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gnu / gcc / 82b61df521d17a96f60e56ede06a55a8894b1c2e / . / gcc / cp / decl.c
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/* Process declarations and variables for C compiler.
Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
2001 Free Software Foundation, Inc.
Contributed by Michael Tiemann (tiemann@cygnus.com)
This file is part of GNU CC.
GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* Process declarations and symbol lookup for C front end.
Also constructs types; the standard scalar types at initialization,
and structure, union, array and enum types when they are declared. */
/* ??? not all decl nodes are given the most useful possible
line numbers. For example, the CONST_DECLs for enum values. */
#include "config.h"
#include "system.h"
#include "tree.h"
#include "rtl.h"
#include "expr.h"
#include "flags.h"
#include "cp-tree.h"
#include "tree-inline.h"
#include "decl.h"
#include "lex.h"
#include "output.h"
#include "except.h"
#include "toplev.h"
#include "../hash.h"
#include "ggc.h"
#include "tm_p.h"
#include "target.h"
#include "c-common.h"
extern const struct attribute_spec *lang_attribute_table;
#ifndef BOOL_TYPE_SIZE
/* `bool' has size and alignment `1', on all platforms. */
#define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
#endif
static tree grokparms PARAMS ((tree));
static const char *redeclaration_error_message PARAMS ((tree, tree));
static void push_binding_level PARAMS ((struct binding_level *, int,
int));
static void pop_binding_level PARAMS ((void));
static void suspend_binding_level PARAMS ((void));
static void resume_binding_level PARAMS ((struct binding_level *));
static struct binding_level *make_binding_level PARAMS ((void));
static void declare_namespace_level PARAMS ((void));
static int decl_jump_unsafe PARAMS ((tree));
static void storedecls PARAMS ((tree));
static void require_complete_types_for_parms PARAMS ((tree));
static int ambi_op_p PARAMS ((enum tree_code));
static int unary_op_p PARAMS ((enum tree_code));
static tree store_bindings PARAMS ((tree, tree));
static tree lookup_tag_reverse PARAMS ((tree, tree));
static tree obscure_complex_init PARAMS ((tree, tree));
static tree lookup_name_real PARAMS ((tree, int, int, int));
static void push_local_name PARAMS ((tree));
static void warn_extern_redeclared_static PARAMS ((tree, tree));
static tree grok_reference_init PARAMS ((tree, tree, tree));
static tree grokfndecl PARAMS ((tree, tree, tree, tree, int,
enum overload_flags, tree,
tree, int, int, int, int, int, int, tree));
static tree grokvardecl PARAMS ((tree, tree, RID_BIT_TYPE *, int, int, tree));
static tree lookup_tag PARAMS ((enum tree_code, tree,
struct binding_level *, int));
static void set_identifier_type_value_with_scope
PARAMS ((tree, tree, struct binding_level *));
static void record_unknown_type PARAMS ((tree, const char *));
static tree build_library_fn_1 PARAMS ((tree, enum tree_code, tree));
static int member_function_or_else PARAMS ((tree, tree, enum overload_flags));
static void bad_specifiers PARAMS ((tree, const char *, int, int, int, int,
int));
static tree maybe_process_template_type_declaration PARAMS ((tree, int, struct binding_level*));
static void check_for_uninitialized_const_var PARAMS ((tree));
static unsigned long typename_hash PARAMS ((hash_table_key));
static bool typename_compare PARAMS ((hash_table_key, hash_table_key));
static void push_binding PARAMS ((tree, tree, struct binding_level*));
static int add_binding PARAMS ((tree, tree));
static void pop_binding PARAMS ((tree, tree));
static tree local_variable_p_walkfn PARAMS ((tree *, int *, void *));
static tree find_binding PARAMS ((tree, tree));
static tree select_decl PARAMS ((tree, int));
static int lookup_flags PARAMS ((int, int));
static tree qualify_lookup PARAMS ((tree, int));
static tree record_builtin_java_type PARAMS ((const char *, int));
static const char *tag_name PARAMS ((enum tag_types code));
static void find_class_binding_level PARAMS ((void));
static struct binding_level *innermost_nonclass_level PARAMS ((void));
static void warn_about_implicit_typename_lookup PARAMS ((tree, tree));
static int walk_namespaces_r PARAMS ((tree, walk_namespaces_fn, void *));
static int walk_globals_r PARAMS ((tree, void *));
static void add_decl_to_level PARAMS ((tree, struct binding_level *));
static tree make_label_decl PARAMS ((tree, int));
static void use_label PARAMS ((tree));
static void check_previous_goto_1 PARAMS ((tree, struct binding_level *, tree,
const char *, int));
static void check_previous_goto PARAMS ((struct named_label_use_list *));
static void check_switch_goto PARAMS ((struct binding_level *));
static void check_previous_gotos PARAMS ((tree));
static void pop_label PARAMS ((tree, tree));
static void pop_labels PARAMS ((tree));
static void maybe_deduce_size_from_array_init PARAMS ((tree, tree));
static void layout_var_decl PARAMS ((tree));
static void maybe_commonize_var PARAMS ((tree));
static tree check_initializer PARAMS ((tree, tree));
static void make_rtl_for_nonlocal_decl PARAMS ((tree, tree, const char *));
static void push_cp_function_context PARAMS ((struct function *));
static void pop_cp_function_context PARAMS ((struct function *));
static void mark_binding_level PARAMS ((void *));
static void mark_named_label_lists PARAMS ((void *, void *));
static void mark_cp_function_context PARAMS ((struct function *));
static void mark_saved_scope PARAMS ((void *));
static void mark_lang_function PARAMS ((struct cp_language_function *));
static void save_function_data PARAMS ((tree));
static void check_function_type PARAMS ((tree, tree));
static void destroy_local_var PARAMS ((tree));
static void finish_constructor_body PARAMS ((void));
static void finish_destructor_body PARAMS ((void));
static tree create_array_type_for_decl PARAMS ((tree, tree, tree));
static tree get_atexit_node PARAMS ((void));
static tree get_dso_handle_node PARAMS ((void));
static tree start_cleanup_fn PARAMS ((void));
static void end_cleanup_fn PARAMS ((void));
static tree cp_make_fname_decl PARAMS ((tree, int));
static void initialize_predefined_identifiers PARAMS ((void));
static tree check_special_function_return_type
PARAMS ((special_function_kind, tree, tree));
static tree push_cp_library_fn PARAMS ((enum tree_code, tree));
static tree build_cp_library_fn PARAMS ((tree, enum tree_code, tree));
static void store_parm_decls PARAMS ((tree));
static int cp_missing_noreturn_ok_p PARAMS ((tree));
#if defined (DEBUG_CP_BINDING_LEVELS)
static void indent PARAMS ((void));
#endif
/* Erroneous argument lists can use this *IFF* they do not modify it. */
tree error_mark_list;
/* The following symbols are subsumed in the cp_global_trees array, and
listed here individually for documentation purposes.
C++ extensions
tree wchar_decl_node;
tree vtable_entry_type;
tree delta_type_node;
tree __t_desc_type_node;
tree ti_desc_type_node;
tree bltn_desc_type_node, ptr_desc_type_node;
tree ary_desc_type_node, func_desc_type_node, enum_desc_type_node;
tree class_desc_type_node, si_class_desc_type_node, vmi_class_desc_type_node;
tree ptm_desc_type_node;
tree base_desc_type_node;
tree class_type_node, record_type_node, union_type_node, enum_type_node;
tree unknown_type_node;
Array type `vtable_entry_type[]'
tree vtbl_type_node;
tree vtbl_ptr_type_node;
Namespaces,
tree std_node;
tree abi_node;
A FUNCTION_DECL which can call `abort'. Not necessarily the
one that the user will declare, but sufficient to be called
by routines that want to abort the program.
tree abort_fndecl;
The FUNCTION_DECL for the default `::operator delete'.
tree global_delete_fndecl;
Used by RTTI
tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
tree tinfo_var_id;
*/
tree cp_global_trees[CPTI_MAX];
/* Indicates that there is a type value in some namespace, although
that is not necessarily in scope at the moment. */
static tree global_type_node;
/* Expect only namespace names now. */
static int only_namespace_names;
/* Used only for jumps to as-yet undefined labels, since jumps to
defined labels can have their validity checked immediately. */
struct named_label_use_list
{
struct binding_level *binding_level;
tree names_in_scope;
tree label_decl;
const char *filename_o_goto;
int lineno_o_goto;
struct named_label_use_list *next;
};
#define named_label_uses cp_function_chain->x_named_label_uses
#define local_names cp_function_chain->x_local_names
/* A list of objects which have constructors or destructors
which reside in the global scope. The decl is stored in
the TREE_VALUE slot and the initializer is stored
in the TREE_PURPOSE slot. */
tree static_aggregates;
/* -- end of C++ */
/* A node for the integer constants 2, and 3. */
tree integer_two_node, integer_three_node;
/* Similar, for last_function_parm_tags. */
tree last_function_parms;
/* A list of all LABEL_DECLs in the function that have names. Here so
we can clear out their names' definitions at the end of the
function, and so we can check the validity of jumps to these labels. */
struct named_label_list
{
struct binding_level *binding_level;
tree names_in_scope;
tree old_value;
tree label_decl;
tree bad_decls;
struct named_label_list *next;
unsigned int in_try_scope : 1;
unsigned int in_catch_scope : 1;
};
#define named_labels cp_function_chain->x_named_labels
/* Nonzero means use the ISO C94 dialect of C. */
int flag_isoc94;
/* Nonzero means use the ISO C99 dialect of C. */
int flag_isoc99;
/* Nonzero means we are a hosted implementation for code shared with C. */
int flag_hosted = 1;
/* Nonzero means add default format_arg attributes for functions not
in ISO C. */
int flag_noniso_default_format_attributes = 1;
/* Nonzero if we want to conserve space in the .o files. We do this
by putting uninitialized data and runtime initialized data into
.common instead of .data at the expense of not flagging multiple
definitions. */
extern int flag_conserve_space;
/* C and C++ flags are in decl2.c. */
/* Flag used when debugging spew.c */
extern int spew_debug;
/* A expression of value 0 with the same precision as a sizetype
node, but signed. */
tree signed_size_zero_node;
/* The name of the anonymous namespace, throughout this translation
unit. */
tree anonymous_namespace_name;
/* The number of function bodies which we are currently processing.
(Zero if we are at namespace scope, one inside the body of a
function, two inside the body of a function in a local class, etc.) */
int function_depth;
/* For each binding contour we allocate a binding_level structure
which records the names defined in that contour.
Contours include:
0) the global one
1) one for each function definition,
where internal declarations of the parameters appear.
2) one for each compound statement,
to record its declarations.
The current meaning of a name can be found by searching the levels
from the current one out to the global one.
Off to the side, may be the class_binding_level. This exists only
to catch class-local declarations. It is otherwise nonexistent.
Also there may be binding levels that catch cleanups that must be
run when exceptions occur. Thus, to see whether a name is bound in
the current scope, it is not enough to look in the
CURRENT_BINDING_LEVEL. You should use lookup_name_current_level
instead. */
/* Note that the information in the `names' component of the global contour
is duplicated in the IDENTIFIER_GLOBAL_VALUEs of all identifiers. */
struct binding_level
{
/* A chain of _DECL nodes for all variables, constants, functions,
and typedef types. These are in the reverse of the order
supplied. There may be OVERLOADs on this list, too, but they
are wrapped in TREE_LISTs; the TREE_VALUE is the OVERLOAD. */
tree names;
/* A list of structure, union and enum definitions, for looking up
tag names.
It is a chain of TREE_LIST nodes, each of whose TREE_PURPOSE is a name,
or NULL_TREE; and whose TREE_VALUE is a RECORD_TYPE, UNION_TYPE,
or ENUMERAL_TYPE node.
C++: the TREE_VALUE nodes can be simple types for
component_bindings. */
tree tags;
/* A list of USING_DECL nodes. */
tree usings;
/* A list of used namespaces. PURPOSE is the namespace,
VALUE the common ancestor with this binding_level's namespace. */
tree using_directives;
/* If this binding level is the binding level for a class, then
class_shadowed is a TREE_LIST. The TREE_PURPOSE of each node
is the name of an entity bound in the class. The TREE_TYPE is
the DECL bound by this name in the class. */
tree class_shadowed;
/* Similar to class_shadowed, but for IDENTIFIER_TYPE_VALUE, and
is used for all binding levels. In addition the TREE_VALUE is the
IDENTIFIER_TYPE_VALUE before we entered the class. */
tree type_shadowed;
/* A TREE_LIST. Each TREE_VALUE is the LABEL_DECL for a local
label in this scope. The TREE_PURPOSE is the previous value of
the IDENTIFIER_LABEL VALUE. */
tree shadowed_labels;
/* For each level (except not the global one),
a chain of BLOCK nodes for all the levels
that were entered and exited one level down. */
tree blocks;
/* The _TYPE node for this level, if parm_flag == 2. */
tree this_class;
/* The binding level which this one is contained in (inherits from). */
struct binding_level *level_chain;
/* List of decls in `names' that have incomplete
structure or union types. */
tree incomplete;
/* List of VAR_DECLS saved from a previous for statement.
These would be dead in ISO-conforming code, but might
be referenced in ARM-era code. These are stored in a
TREE_LIST; the TREE_VALUE is the actual declaration. */
tree dead_vars_from_for;
/* 1 for the level that holds the parameters of a function.
2 for the level that holds a class declaration. */
unsigned parm_flag : 2;
/* 1 means make a BLOCK for this level regardless of all else.
2 for temporary binding contours created by the compiler. */
unsigned keep : 2;
/* Nonzero if this level "doesn't exist" for tags. */
unsigned tag_transparent : 1;
/* Nonzero if this level can safely have additional
cleanup-needing variables added to it. */
unsigned more_cleanups_ok : 1;
unsigned have_cleanups : 1;
/* Nonzero if this scope is for storing the decls for template
parameters and generic decls; these decls will be discarded and
replaced with a TEMPLATE_DECL. */
unsigned template_parms_p : 1;
/* Nonzero if this scope corresponds to the `<>' in a
`template <>' clause. Whenever this flag is set,
TEMPLATE_PARMS_P will be set as well. */
unsigned template_spec_p : 1;
/* This is set for a namespace binding level. */
unsigned namespace_p : 1;
/* True if this level is that of a for-statement where we need to
worry about ambiguous (ARM or ISO) scope rules. */
unsigned is_for_scope : 1;
/* True if this level corresponds to a TRY block. Currently this
information is only available while building the tree structure. */
unsigned is_try_scope : 1;
/* True if this level corresponds to a CATCH block. Currently this
information is only available while building the tree structure. */
unsigned is_catch_scope : 1;
/* Three bits left for this word. */
#if defined(DEBUG_CP_BINDING_LEVELS)
/* Binding depth at which this level began. */
unsigned binding_depth;
#endif /* defined(DEBUG_CP_BINDING_LEVELS) */
};
#define NULL_BINDING_LEVEL ((struct binding_level *) NULL)
/* The binding level currently in effect. */
#define current_binding_level \
(cfun && cp_function_chain->bindings \
? cp_function_chain->bindings \
: scope_chain->bindings)
/* The binding level of the current class, if any. */
#define class_binding_level scope_chain->class_bindings
/* A chain of binding_level structures awaiting reuse. */
static struct binding_level *free_binding_level;
/* The outermost binding level, for names of file scope.
This is created when the compiler is started and exists
through the entire run. */
static struct binding_level *global_binding_level;
/* Nonzero means unconditionally make a BLOCK for the next level pushed. */
static int keep_next_level_flag;
#if defined(DEBUG_CP_BINDING_LEVELS)
static int binding_depth = 0;
static int is_class_level = 0;
static void
indent ()
{
register unsigned i;
for (i = 0; i < binding_depth*2; i++)
putc (' ', stderr);
}
#endif /* defined(DEBUG_CP_BINDING_LEVELS) */
static tree pushdecl_with_scope PARAMS ((tree, struct binding_level *));
static void
push_binding_level (newlevel, tag_transparent, keep)
struct binding_level *newlevel;
int tag_transparent, keep;
{
/* Add this level to the front of the chain (stack) of levels that
are active. */
memset ((char*) newlevel, 0, sizeof (struct binding_level));
newlevel->level_chain = current_binding_level;
current_binding_level = newlevel;
newlevel->tag_transparent = tag_transparent;
newlevel->more_cleanups_ok = 1;
newlevel->keep = keep;
#if defined(DEBUG_CP_BINDING_LEVELS)
newlevel->binding_depth = binding_depth;
indent ();
fprintf (stderr, "push %s level 0x%08x line %d\n",
(is_class_level) ? "class" : "block", newlevel, lineno);
is_class_level = 0;
binding_depth++;
#endif /* defined(DEBUG_CP_BINDING_LEVELS) */
}
/* Find the innermost enclosing class scope, and reset
CLASS_BINDING_LEVEL appropriately. */
static void
find_class_binding_level ()
{
struct binding_level *level = current_binding_level;
while (level && level->parm_flag != 2)
level = level->level_chain;
if (level && level->parm_flag == 2)
class_binding_level = level;
else
class_binding_level = 0;
}
static void
pop_binding_level ()
{
if (global_binding_level)
{
/* Cannot pop a level, if there are none left to pop. */
if (current_binding_level == global_binding_level)
my_friendly_abort (123);
}
/* Pop the current level, and free the structure for reuse. */
#if defined(DEBUG_CP_BINDING_LEVELS)
binding_depth--;
indent ();
fprintf (stderr, "pop %s level 0x%08x line %d\n",
(is_class_level) ? "class" : "block",
current_binding_level, lineno);
if (is_class_level != (current_binding_level == class_binding_level))
{
indent ();
fprintf (stderr, "XXX is_class_level != (current_binding_level == class_binding_level)\n");
}
is_class_level = 0;
#endif /* defined(DEBUG_CP_BINDING_LEVELS) */
{
register struct binding_level *level = current_binding_level;
current_binding_level = current_binding_level->level_chain;
level->level_chain = free_binding_level;
#if 0 /* defined(DEBUG_CP_BINDING_LEVELS) */
if (level->binding_depth != binding_depth)
abort ();
#endif /* defined(DEBUG_CP_BINDING_LEVELS) */
free_binding_level = level;
find_class_binding_level ();
}
}
static void
suspend_binding_level ()
{
if (class_binding_level)
current_binding_level = class_binding_level;
if (global_binding_level)
{
/* Cannot suspend a level, if there are none left to suspend. */
if (current_binding_level == global_binding_level)
my_friendly_abort (123);
}
/* Suspend the current level. */
#if defined(DEBUG_CP_BINDING_LEVELS)
binding_depth--;
indent ();
fprintf (stderr, "suspend %s level 0x%08x line %d\n",
(is_class_level) ? "class" : "block",
current_binding_level, lineno);
if (is_class_level != (current_binding_level == class_binding_level))
{
indent ();
fprintf (stderr, "XXX is_class_level != (current_binding_level == class_binding_level)\n");
}
is_class_level = 0;
#endif /* defined(DEBUG_CP_BINDING_LEVELS) */
current_binding_level = current_binding_level->level_chain;
find_class_binding_level ();
}
static void
resume_binding_level (b)
struct binding_level *b;
{
/* Resuming binding levels is meant only for namespaces,
and those cannot nest into classes. */
my_friendly_assert(!class_binding_level, 386);
/* Also, resuming a non-directly nested namespace is a no-no. */
my_friendly_assert(b->level_chain == current_binding_level, 386);
current_binding_level = b;
#if defined(DEBUG_CP_BINDING_LEVELS)
b->binding_depth = binding_depth;
indent ();
fprintf (stderr, "resume %s level 0x%08x line %d\n",
(is_class_level) ? "class" : "block", b, lineno);
is_class_level = 0;
binding_depth++;
#endif /* defined(DEBUG_CP_BINDING_LEVELS) */
}
/* Create a new `struct binding_level'. */
static
struct binding_level *
make_binding_level ()
{
/* NOSTRICT */
return (struct binding_level *) xmalloc (sizeof (struct binding_level));
}
/* Nonzero if we are currently in the global binding level. */
int
global_bindings_p ()
{
return current_binding_level == global_binding_level;
}
/* Return the innermost binding level that is not for a class scope. */
static struct binding_level *
innermost_nonclass_level ()
{
struct binding_level *b;
b = current_binding_level;
while (b->parm_flag == 2)
b = b->level_chain;
return b;
}
/* Nonzero if we are currently in a toplevel binding level. This
means either the global binding level or a namespace in a toplevel
binding level. Since there are no non-toplevel namespace levels,
this really means any namespace or template parameter level. We
also include a class whose context is toplevel. */
int
toplevel_bindings_p ()
{
struct binding_level *b = innermost_nonclass_level ();
return b->namespace_p || b->template_parms_p;
}
/* Nonzero if this is a namespace scope, or if we are defining a class
which is itself at namespace scope, or whose enclosing class is
such a class, etc. */
int
namespace_bindings_p ()
{
struct binding_level *b = innermost_nonclass_level ();
return b->namespace_p;
}
/* If KEEP is non-zero, make a BLOCK node for the next binding level,
unconditionally. Otherwise, use the normal logic to decide whether
or not to create a BLOCK. */
void
keep_next_level (keep)
int keep;
{
keep_next_level_flag = keep;
}
/* Nonzero if the current level needs to have a BLOCK made. */
int
kept_level_p ()
{
return (current_binding_level->blocks != NULL_TREE
|| current_binding_level->keep
|| current_binding_level->names != NULL_TREE
|| (current_binding_level->tags != NULL_TREE
&& !current_binding_level->tag_transparent));
}
static void
declare_namespace_level ()
{
current_binding_level->namespace_p = 1;
}
/* Returns non-zero if this scope was created to store template
parameters. */
int
template_parm_scope_p ()
{
return current_binding_level->template_parms_p;
}
/* Returns the kind of template specialization we are currently
processing, given that it's declaration contained N_CLASS_SCOPES
explicit scope qualifications. */
tmpl_spec_kind
current_tmpl_spec_kind (n_class_scopes)
int n_class_scopes;
{
int n_template_parm_scopes = 0;
int seen_specialization_p = 0;
int innermost_specialization_p = 0;
struct binding_level *b;
/* Scan through the template parameter scopes. */
for (b = current_binding_level; b->template_parms_p; b = b->level_chain)
{
/* If we see a specialization scope inside a parameter scope,
then something is wrong. That corresponds to a declaration
like:
template <class T> template <> ...
which is always illegal since [temp.expl.spec] forbids the
specialization of a class member template if the enclosing
class templates are not explicitly specialized as well. */
if (b->template_spec_p)
{
if (n_template_parm_scopes == 0)
innermost_specialization_p = 1;
else
seen_specialization_p = 1;
}
else if (seen_specialization_p == 1)
return tsk_invalid_member_spec;
++n_template_parm_scopes;
}
/* Handle explicit instantiations. */
if (processing_explicit_instantiation)
{
if (n_template_parm_scopes != 0)
/* We've seen a template parameter list during an explicit
instantiation. For example:
template <class T> template void f(int);
This is erroneous. */
return tsk_invalid_expl_inst;
else
return tsk_expl_inst;
}
if (n_template_parm_scopes < n_class_scopes)
/* We've not seen enough template headers to match all the
specialized classes present. For example:
template <class T> void R<T>::S<T>::f(int);
This is illegal; there needs to be one set of template
parameters for each class. */
return tsk_insufficient_parms;
else if (n_template_parm_scopes == n_class_scopes)
/* We're processing a non-template declaration (even though it may
be a member of a template class.) For example:
template <class T> void S<T>::f(int);
The `class T' maches the `S<T>', leaving no template headers
corresponding to the `f'. */
return tsk_none;
else if (n_template_parm_scopes > n_class_scopes + 1)
/* We've got too many template headers. For example:
template <> template <class T> void f (T);
There need to be more enclosing classes. */
return tsk_excessive_parms;
else
/* This must be a template. It's of the form:
template <class T> template <class U> void S<T>::f(U);
This is a specialization if the innermost level was a
specialization; otherwise it's just a definition of the
template. */
return innermost_specialization_p ? tsk_expl_spec : tsk_template;
}
void
set_class_shadows (shadows)
tree shadows;
{
class_binding_level->class_shadowed = shadows;
}
/* Enter a new binding level.
If TAG_TRANSPARENT is nonzero, do so only for the name space of variables,
not for that of tags. */
void
pushlevel (tag_transparent)
int tag_transparent;
{
struct binding_level *newlevel;
if (cfun && !doing_semantic_analysis_p ())
return;
/* Reuse or create a struct for this binding level. */
#if defined(DEBUG_CP_BINDING_LEVELS)
if (0)
#else /* !defined(DEBUG_CP_BINDING_LEVELS) */
if (free_binding_level)
#endif /* !defined(DEBUG_CP_BINDING_LEVELS) */
{
newlevel = free_binding_level;
free_binding_level = free_binding_level->level_chain;
}
else
newlevel = make_binding_level ();
push_binding_level (newlevel, tag_transparent, keep_next_level_flag);
GNU_xref_start_scope ((size_t) newlevel);
keep_next_level_flag = 0;
}
/* We're defining an object of type TYPE. If it needs a cleanup, but
we're not allowed to add any more objects with cleanups to the current
scope, create a new binding level. */
void
maybe_push_cleanup_level (type)
tree type;
{
if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
&& current_binding_level->more_cleanups_ok == 0)
{
keep_next_level (2);
pushlevel (1);
clear_last_expr ();
add_scope_stmt (/*begin_p=*/1, /*partial_p=*/1);
}
}
/* Enter a new scope. The KIND indicates what kind of scope is being
created. */
void
begin_scope (sk)
scope_kind sk;
{
pushlevel (0);
switch (sk)
{
case sk_template_spec:
current_binding_level->template_spec_p = 1;
/* Fall through. */
case sk_template_parms:
current_binding_level->template_parms_p = 1;
break;
default:
my_friendly_abort (20000309);
}
}
/* Exit the current scope. */
void
finish_scope ()
{
poplevel (0, 0, 0);
}
void
note_level_for_for ()
{
current_binding_level->is_for_scope = 1;
}
/* Record that the current binding level represents a try block. */
void
note_level_for_try ()
{
current_binding_level->is_try_scope = 1;
}
/* Record that the current binding level represents a catch block. */
void
note_level_for_catch ()
{
current_binding_level->is_catch_scope = 1;
}
/* For a binding between a name and an entity at a block scope,
this is the `struct binding_level' for the block. */
#define BINDING_LEVEL(NODE) \
(((struct tree_binding*)NODE)->scope.level)
/* A free list of CPLUS_BINDING nodes, connected by their
TREE_CHAINs. */
static tree free_bindings;
/* Make DECL the innermost binding for ID. The LEVEL is the binding
level at which this declaration is being bound. */
static void
push_binding (id, decl, level)
tree id;
tree decl;
struct binding_level* level;
{
tree binding;
if (free_bindings)
{
binding = free_bindings;
free_bindings = TREE_CHAIN (binding);
}
else
binding = make_node (CPLUS_BINDING);
/* Now, fill in the binding information. */
BINDING_VALUE (binding) = decl;
BINDING_TYPE (binding) = NULL_TREE;
BINDING_LEVEL (binding) = level;
INHERITED_VALUE_BINDING_P (binding) = 0;
LOCAL_BINDING_P (binding) = (level != class_binding_level);
BINDING_HAS_LEVEL_P (binding) = 1;
/* And put it on the front of the list of bindings for ID. */
TREE_CHAIN (binding) = IDENTIFIER_BINDING (id);
IDENTIFIER_BINDING (id) = binding;
}
/* ID is already bound in the current scope. But, DECL is an
additional binding for ID in the same scope. This is the `struct
stat' hack whereby a non-typedef class-name or enum-name can be
bound at the same level as some other kind of entity. It's the
responsibility of the caller to check that inserting this name is
legal here. Returns nonzero if the new binding was successful. */
static int
add_binding (id, decl)
tree id;
tree decl;
{
tree binding = IDENTIFIER_BINDING (id);
int ok = 1;
if (TREE_CODE (decl) == TYPE_DECL && DECL_ARTIFICIAL (decl))
/* The new name is the type name. */
BINDING_TYPE (binding) = decl;
else if (!BINDING_VALUE (binding))
/* This situation arises when push_class_level_binding moves an
inherited type-binding out of the way to make room for a new
value binding. */
BINDING_VALUE (binding) = decl;
else if (TREE_CODE (BINDING_VALUE (binding)) == TYPE_DECL
&& DECL_ARTIFICIAL (BINDING_VALUE (binding)))
{
/* The old binding was a type name. It was placed in
BINDING_VALUE because it was thought, at the point it was
declared, to be the only entity with such a name. Move the
type name into the type slot; it is now hidden by the new
binding. */
BINDING_TYPE (binding) = BINDING_VALUE (binding);
BINDING_VALUE (binding) = decl;
INHERITED_VALUE_BINDING_P (binding) = 0;
}
else if (TREE_CODE (BINDING_VALUE (binding)) == TYPE_DECL
&& TREE_CODE (decl) == TYPE_DECL
&& DECL_NAME (decl) == DECL_NAME (BINDING_VALUE (binding))
&& (same_type_p (TREE_TYPE (decl),
TREE_TYPE (BINDING_VALUE (binding)))
/* If either type involves template parameters, we must
wait until instantiation. */
|| uses_template_parms (TREE_TYPE (decl))
|| uses_template_parms (TREE_TYPE (BINDING_VALUE (binding)))))
/* We have two typedef-names, both naming the same type to have
the same name. This is OK because of:
[dcl.typedef]
In a given scope, a typedef specifier can be used to redefine
the name of any type declared in that scope to refer to the
type to which it already refers. */
ok = 0;
/* There can be two block-scope declarations of the same variable,
so long as they are `extern' declarations. */
else if (TREE_CODE (decl) == VAR_DECL
&& TREE_CODE (BINDING_VALUE (binding)) == VAR_DECL
&& DECL_EXTERNAL (decl)
&& DECL_EXTERNAL (BINDING_VALUE (binding)))
{
duplicate_decls (decl, BINDING_VALUE (binding));
ok = 0;
}
else
{
error ("declaration of `%#D'", decl);
cp_error_at ("conflicts with previous declaration `%#D'",
BINDING_VALUE (binding));
ok = 0;
}
return ok;
}
/* Add DECL to the list of things declared in B. */
static void
add_decl_to_level (decl, b)
tree decl;
struct binding_level *b;
{
/* We build up the list in reverse order, and reverse it later if
necessary. */
TREE_CHAIN (decl) = b->names;
b->names = decl;
}
/* Bind DECL to ID in the current_binding_level, assumed to be a local
binding level. If PUSH_USING is set in FLAGS, we know that DECL
doesn't really belong to this binding level, that it got here
through a using-declaration. */
void
push_local_binding (id, decl, flags)
tree id;
tree decl;
int flags;
{
struct binding_level *b;
/* Skip over any local classes. This makes sense if we call
push_local_binding with a friend decl of a local class. */
b = current_binding_level;
while (b->parm_flag == 2)
b = b->level_chain;
if (lookup_name_current_level (id))
{
/* Supplement the existing binding. */
if (!add_binding (id, decl))
/* It didn't work. Something else must be bound at this
level. Do not add DECL to the list of things to pop
later. */
return;
}
else
/* Create a new binding. */
push_binding (id, decl, b);
if (TREE_CODE (decl) == OVERLOAD || (flags & PUSH_USING))
/* We must put the OVERLOAD into a TREE_LIST since the
TREE_CHAIN of an OVERLOAD is already used. Similarly for
decls that got here through a using-declaration. */
decl = build_tree_list (NULL_TREE, decl);
/* And put DECL on the list of things declared by the current
binding level. */
add_decl_to_level (decl, b);
}
/* Bind DECL to ID in the class_binding_level. Returns nonzero if the
binding was successful. */
int
push_class_binding (id, decl)
tree id;
tree decl;
{
int result = 1;
tree binding = IDENTIFIER_BINDING (id);
tree context;
/* Note that we declared this value so that we can issue an error if
this an illegal redeclaration of a name already used for some
other purpose. */
note_name_declared_in_class (id, decl);
if (binding && BINDING_LEVEL (binding) == class_binding_level)
/* Supplement the existing binding. */
result = add_binding (id, decl);
else
/* Create a new binding. */
push_binding (id, decl, class_binding_level);
/* Update the IDENTIFIER_CLASS_VALUE for this ID to be the
class-level declaration. Note that we do not use DECL here
because of the possibility of the `struct stat' hack; if DECL is
a class-name or enum-name we might prefer a field-name, or some
such. */
IDENTIFIER_CLASS_VALUE (id) = BINDING_VALUE (IDENTIFIER_BINDING (id));
/* If this is a binding from a base class, mark it as such. */
binding = IDENTIFIER_BINDING (id);
if (BINDING_VALUE (binding) == decl && TREE_CODE (decl) != TREE_LIST)
{
/* Any implicit typename must be from a base-class. The
context for an implicit typename declaration is always
the derived class in which the lookup was done, so the checks
based on the context of DECL below will not trigger. */
if (IMPLICIT_TYPENAME_TYPE_DECL_P (decl))
INHERITED_VALUE_BINDING_P (binding) = 1;
else
{
if (TREE_CODE (decl) == OVERLOAD)
context = CP_DECL_CONTEXT (OVL_CURRENT (decl));
else
{
my_friendly_assert (DECL_P (decl), 0);
context = context_for_name_lookup (decl);
}
if (is_properly_derived_from (current_class_type, context))
INHERITED_VALUE_BINDING_P (binding) = 1;
else
INHERITED_VALUE_BINDING_P (binding) = 0;
}
}
else if (BINDING_VALUE (binding) == decl)
/* We only encounter a TREE_LIST when push_class_decls detects an
ambiguity. Such an ambiguity can be overridden by a definition
in this class. */
INHERITED_VALUE_BINDING_P (binding) = 1;
return result;
}
/* Remove the binding for DECL which should be the innermost binding
for ID. */
static void
pop_binding (id, decl)
tree id;
tree decl;
{
tree binding;
if (id == NULL_TREE)
/* It's easiest to write the loops that call this function without
checking whether or not the entities involved have names. We
get here for such an entity. */
return;
/* Get the innermost binding for ID. */
binding = IDENTIFIER_BINDING (id);
/* The name should be bound. */
my_friendly_assert (binding != NULL_TREE, 0);
/* The DECL will be either the ordinary binding or the type
binding for this identifier. Remove that binding. */
if (BINDING_VALUE (binding) == decl)
BINDING_VALUE (binding) = NULL_TREE;
else if (BINDING_TYPE (binding) == decl)
BINDING_TYPE (binding) = NULL_TREE;
else
my_friendly_abort (0);
if (!BINDING_VALUE (binding) && !BINDING_TYPE (binding))
{
/* We're completely done with the innermost binding for this
identifier. Unhook it from the list of bindings. */
IDENTIFIER_BINDING (id) = TREE_CHAIN (binding);
/* Add it to the free list. */
TREE_CHAIN (binding) = free_bindings;
free_bindings = binding;
/* Clear the BINDING_LEVEL so the garbage collector doesn't walk
it. */
BINDING_LEVEL (binding) = NULL;
}
}
/* When a label goes out of scope, check to see if that label was used
in a valid manner, and issue any appropriate warnings or errors. */
static void
pop_label (label, old_value)
tree label;
tree old_value;
{
if (!processing_template_decl && doing_semantic_analysis_p ())
{
if (DECL_INITIAL (label) == NULL_TREE)
{
cp_error_at ("label `%D' used but not defined", label);
/* Avoid crashing later. */
define_label (input_filename, 1, DECL_NAME (label));
}
else if (warn_unused_label && !TREE_USED (label))
cp_warning_at ("label `%D' defined but not used", label);
}
SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
}
/* At the end of a function, all labels declared within the function
go out of scope. BLOCK is the top-level block for the
function. */
static void
pop_labels (block)
tree block;
{
struct named_label_list *link;
/* Clear out the definitions of all label names, since their scopes
end here. */
for (link = named_labels; link; link = link->next)
{
pop_label (link->label_decl, link->old_value);
/* Put the labels into the "variables" of the top-level block,
so debugger can see them. */
TREE_CHAIN (link->label_decl) = BLOCK_VARS (block);
BLOCK_VARS (block) = link->label_decl;
}
named_labels = NULL;
}
/* Exit a binding level.
Pop the level off, and restore the state of the identifier-decl mappings
that were in effect when this level was entered.
If KEEP == 1, this level had explicit declarations, so
and create a "block" (a BLOCK node) for the level
to record its declarations and subblocks for symbol table output.
If FUNCTIONBODY is nonzero, this level is the body of a function,
so create a block as if KEEP were set and also clear out all
label names.
If REVERSE is nonzero, reverse the order of decls before putting
them into the BLOCK. */
tree
poplevel (keep, reverse, functionbody)
int keep;
int reverse;
int functionbody;
{
register tree link;
/* The chain of decls was accumulated in reverse order.
Put it into forward order, just for cleanliness. */
tree decls;
int tmp = functionbody;
int real_functionbody;
tree tags;
tree subblocks;
tree block = NULL_TREE;
tree decl;
int leaving_for_scope;
if (cfun && !doing_semantic_analysis_p ())
return NULL_TREE;
my_friendly_assert (current_binding_level->parm_flag != 2,
19990916);
real_functionbody = (current_binding_level->keep == 2
? ((functionbody = 0), tmp) : functionbody);
tags = functionbody >= 0 ? current_binding_level->tags : 0;
subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
my_friendly_assert (!current_binding_level->class_shadowed,
19990414);
/* We used to use KEEP == 2 to indicate that the new block should go
at the beginning of the list of blocks at this binding level,
rather than the end. This hack is no longer used. */
my_friendly_assert (keep == 0 || keep == 1, 0);
GNU_xref_end_scope ((size_t) current_binding_level,
(size_t) current_binding_level->level_chain,
current_binding_level->parm_flag,
current_binding_level->keep);
if (current_binding_level->keep == 1)
keep = 1;
/* Any uses of undefined labels, and any defined labels, now operate
under constraints of next binding contour. */
if (cfun && !functionbody)
{
struct binding_level *level_chain;
level_chain = current_binding_level->level_chain;
if (level_chain)
{
struct named_label_use_list *uses;
struct named_label_list *labels;
for (labels = named_labels; labels; labels = labels->next)
if (labels->binding_level == current_binding_level)
{
tree decl;
if (current_binding_level->is_try_scope)
labels->in_try_scope = 1;
if (current_binding_level->is_catch_scope)
labels->in_catch_scope = 1;
for (decl = labels->names_in_scope; decl;
decl = TREE_CHAIN (decl))
if (decl_jump_unsafe (decl))
labels->bad_decls = tree_cons (NULL_TREE, decl,
labels->bad_decls);
labels->binding_level = level_chain;
labels->names_in_scope = level_chain->names;
}
for (uses = named_label_uses; uses; uses = uses->next)
if (uses->binding_level == current_binding_level)
{
uses->binding_level = level_chain;
uses->names_in_scope = level_chain->names;
}
}
}
/* Get the decls in the order they were written.
Usually current_binding_level->names is in reverse order.
But parameter decls were previously put in forward order. */
if (reverse)
current_binding_level->names
= decls = nreverse (current_binding_level->names);
else
decls = current_binding_level->names;
/* Output any nested inline functions within this block
if they weren't already output. */
for (decl = decls; decl; decl = TREE_CHAIN (decl))
if (TREE_CODE (decl) == FUNCTION_DECL
&& ! TREE_ASM_WRITTEN (decl)
&& DECL_INITIAL (decl) != NULL_TREE
&& TREE_ADDRESSABLE (decl)
&& decl_function_context (decl) == current_function_decl)
{
/* If this decl was copied from a file-scope decl
on account of a block-scope extern decl,
propagate TREE_ADDRESSABLE to the file-scope decl. */
if (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE)
TREE_ADDRESSABLE (DECL_ABSTRACT_ORIGIN (decl)) = 1;
else
{
push_function_context ();
output_inline_function (decl);
pop_function_context ();
}
}
/* When not in function-at-a-time mode, expand_end_bindings will
warn about unused variables. But, in function-at-a-time mode
expand_end_bindings is not passed the list of variables in the
current scope, and therefore no warning is emitted. So, we
explicitly warn here. */
if (!processing_template_decl)
warn_about_unused_variables (getdecls ());
/* If there were any declarations or structure tags in that level,
or if this level is a function body,
create a BLOCK to record them for the life of this function. */
block = NULL_TREE;
if (keep == 1 || functionbody)
block = make_node (BLOCK);
if (block != NULL_TREE)
{
BLOCK_VARS (block) = decls;
BLOCK_SUBBLOCKS (block) = subblocks;
}
/* In each subblock, record that this is its superior. */
if (keep >= 0)
for (link = subblocks; link; link = TREE_CHAIN (link))
BLOCK_SUPERCONTEXT (link) = block;
/* We still support the old for-scope rules, whereby the variables
in a for-init statement were in scope after the for-statement
ended. We only use the new rules in flag_new_for_scope is
nonzero. */
leaving_for_scope
= current_binding_level->is_for_scope && flag_new_for_scope == 1;
/* Remove declarations for all the DECLs in this level. */
for (link = decls; link; link = TREE_CHAIN (link))
{
if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
&& DECL_NAME (link))
{
tree outer_binding
= TREE_CHAIN (IDENTIFIER_BINDING (DECL_NAME (link)));
tree ns_binding;
if (!outer_binding)
ns_binding = IDENTIFIER_NAMESPACE_VALUE (DECL_NAME (link));
else
ns_binding = NULL_TREE;
if (outer_binding
&& (BINDING_LEVEL (outer_binding)
== current_binding_level->level_chain))
/* We have something like:
int i;
for (int i; ;);
and we are leaving the `for' scope. There's no reason to
keep the binding of the inner `i' in this case. */
pop_binding (DECL_NAME (link), link);
else if ((outer_binding
&& (TREE_CODE (BINDING_VALUE (outer_binding))
== TYPE_DECL))
|| (ns_binding
&& TREE_CODE (ns_binding) == TYPE_DECL))
/* Here, we have something like:
typedef int I;
void f () {
for (int I; ;);
}
We must pop the for-scope binding so we know what's a
type and what isn't. */
pop_binding (DECL_NAME (link), link);
else
{
/* Mark this VAR_DECL as dead so that we can tell we left it
there only for backward compatibility. */
DECL_DEAD_FOR_LOCAL (link) = 1;
/* Keep track of what should of have happenned when we
popped the binding. */
if (outer_binding && BINDING_VALUE (outer_binding))
DECL_SHADOWED_FOR_VAR (link)
= BINDING_VALUE (outer_binding);
/* Add it to the list of dead variables in the next
outermost binding to that we can remove these when we
leave that binding. */
current_binding_level->level_chain->dead_vars_from_for
= tree_cons (NULL_TREE, link,
current_binding_level->level_chain->
dead_vars_from_for);
/* Although we don't pop the CPLUS_BINDING, we do clear
its BINDING_LEVEL since the level is going away now. */
BINDING_LEVEL (IDENTIFIER_BINDING (DECL_NAME (link)))
= 0;
}
}
else
{
/* Remove the binding. */
decl = link;
if (TREE_CODE (decl) == TREE_LIST)
decl = TREE_VALUE (decl);
if (DECL_P (decl))
pop_binding (DECL_NAME (decl), decl);
else if (TREE_CODE (decl) == OVERLOAD)
pop_binding (DECL_NAME (OVL_FUNCTION (decl)), decl);
else
my_friendly_abort (0);
}
}
/* Remove declarations for any `for' variables from inner scopes
that we kept around. */
for (link = current_binding_level->dead_vars_from_for;
link; link = TREE_CHAIN (link))
pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
/* Restore the IDENTIFIER_TYPE_VALUEs. */
for (link = current_binding_level->type_shadowed;
link; link = TREE_CHAIN (link))
SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
/* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
for (link = current_binding_level->shadowed_labels;
link;
link = TREE_CHAIN (link))
pop_label (TREE_VALUE (link), TREE_PURPOSE (link));
/* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
list if a `using' declaration put them there. The debugging
back-ends won't understand OVERLOAD, so we remove them here.
Because the BLOCK_VARS are (temporarily) shared with
CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
popped all the bindings. */
if (block)
{
tree* d;
for (d = &BLOCK_VARS (block); *d; )
{
if (TREE_CODE (*d) == TREE_LIST)
*d = TREE_CHAIN (*d);
else
d = &TREE_CHAIN (*d);
}
}
/* If the level being exited is the top level of a function,
check over all the labels. */
if (functionbody)
{
/* Since this is the top level block of a function, the vars are
the function's parameters. Don't leave them in the BLOCK
because they are found in the FUNCTION_DECL instead. */
BLOCK_VARS (block) = 0;
pop_labels (block);
}
tmp = current_binding_level->keep;
pop_binding_level ();
if (functionbody)
DECL_INITIAL (current_function_decl) = block;
else if (block)
current_binding_level->blocks
= chainon (current_binding_level->blocks, block);
/* If we did not make a block for the level just exited,
any blocks made for inner levels
(since they cannot be recorded as subblocks in that level)
must be carried forward so they will later become subblocks
of something else. */
else if (subblocks)
current_binding_level->blocks
= chainon (current_binding_level->blocks, subblocks);
/* Each and every BLOCK node created here in `poplevel' is important
(e.g. for proper debugging information) so if we created one
earlier, mark it as "used". */
if (block)
TREE_USED (block) = 1;
/* Take care of compiler's internal binding structures. */
if (tmp == 2)
{
tree scope_stmts;
scope_stmts
= add_scope_stmt (/*begin_p=*/0, /*partial_p=*/1);
if (block)
{
SCOPE_STMT_BLOCK (TREE_PURPOSE (scope_stmts)) = block;
SCOPE_STMT_BLOCK (TREE_VALUE (scope_stmts)) = block;
}
block = poplevel (keep, reverse, functionbody);
}
return block;
}
/* Delete the node BLOCK from the current binding level.
This is used for the block inside a stmt expr ({...})
so that the block can be reinserted where appropriate. */
void
delete_block (block)
tree block;
{
tree t;
if (current_binding_level->blocks == block)
current_binding_level->blocks = TREE_CHAIN (block);
for (t = current_binding_level->blocks; t;)
{
if (TREE_CHAIN (t) == block)
TREE_CHAIN (t) = TREE_CHAIN (block);
else
t = TREE_CHAIN (t);
}
TREE_CHAIN (block) = NULL_TREE;
/* Clear TREE_USED which is always set by poplevel.
The flag is set again if insert_block is called. */
TREE_USED (block) = 0;
}
/* Insert BLOCK at the end of the list of subblocks of the
current binding level. This is used when a BIND_EXPR is expanded,
to handle the BLOCK node inside the BIND_EXPR. */
void
insert_block (block)
tree block;
{
TREE_USED (block) = 1;
current_binding_level->blocks
= chainon (current_binding_level->blocks, block);
}
/* Set the BLOCK node for the innermost scope
(the one we are currently in). */
void
set_block (block)
tree block ATTRIBUTE_UNUSED;
{
/* The RTL expansion machinery requires us to provide this callback,
but it is not applicable in function-at-a-time mode. */
my_friendly_assert (cfun && !doing_semantic_analysis_p (), 20000911);
}
/* Do a pushlevel for class declarations. */
void
pushlevel_class ()
{
register struct binding_level *newlevel;
/* Reuse or create a struct for this binding level. */
#if defined(DEBUG_CP_BINDING_LEVELS)
if (0)
#else /* !defined(DEBUG_CP_BINDING_LEVELS) */
if (free_binding_level)
#endif /* !defined(DEBUG_CP_BINDING_LEVELS) */
{
newlevel = free_binding_level;
free_binding_level = free_binding_level->level_chain;
}
else
newlevel = make_binding_level ();
#if defined(DEBUG_CP_BINDING_LEVELS)
is_class_level = 1;
#endif /* defined(DEBUG_CP_BINDING_LEVELS) */
push_binding_level (newlevel, 0, 0);
class_binding_level = current_binding_level;
class_binding_level->parm_flag = 2;
class_binding_level->this_class = current_class_type;
}
/* ...and a poplevel for class declarations. */
void
poplevel_class ()
{
register struct binding_level *level = class_binding_level;
tree shadowed;
my_friendly_assert (level != 0, 354);
/* If we're leaving a toplevel class, don't bother to do the setting
of IDENTIFIER_CLASS_VALUE to NULL_TREE, since first of all this slot
shouldn't even be used when current_class_type isn't set, and second,
if we don't touch it here, we're able to use the cache effect if the
next time we're entering a class scope, it is the same class. */
if (current_class_depth != 1)
{
struct binding_level* b;
/* Clear out our IDENTIFIER_CLASS_VALUEs. */
for (shadowed = level->class_shadowed;
shadowed;
shadowed = TREE_CHAIN (shadowed))
IDENTIFIER_CLASS_VALUE (TREE_PURPOSE (shadowed)) = NULL_TREE;
/* Find the next enclosing class, and recreate
IDENTIFIER_CLASS_VALUEs appropriate for that class. */
b = level->level_chain;
while (b && b->parm_flag != 2)
b = b->level_chain;
if (b)
for (shadowed = b->class_shadowed;
shadowed;
shadowed = TREE_CHAIN (shadowed))
{
tree t;
t = IDENTIFIER_BINDING (TREE_PURPOSE (shadowed));
while (t && BINDING_LEVEL (t) != b)
t = TREE_CHAIN (t);
if (t)
IDENTIFIER_CLASS_VALUE (TREE_PURPOSE (shadowed))
= BINDING_VALUE (t);
}
}
else
/* Remember to save what IDENTIFIER's were bound in this scope so we
can recover from cache misses. */
{
previous_class_type = current_class_type;
previous_class_values = class_binding_level->class_shadowed;
}
for (shadowed = level->type_shadowed;
shadowed;
shadowed = TREE_CHAIN (shadowed))
SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (shadowed), TREE_VALUE (shadowed));
/* Remove the bindings for all of the class-level declarations. */
for (shadowed = level->class_shadowed;
shadowed;
shadowed = TREE_CHAIN (shadowed))
pop_binding (TREE_PURPOSE (shadowed), TREE_TYPE (shadowed));
GNU_xref_end_scope ((size_t) class_binding_level,
(size_t) class_binding_level->level_chain,
class_binding_level->parm_flag,
class_binding_level->keep);
/* Now, pop out of the binding level which we created up in the
`pushlevel_class' routine. */
#if defined(DEBUG_CP_BINDING_LEVELS)
is_class_level = 1;
#endif /* defined(DEBUG_CP_BINDING_LEVELS) */
pop_binding_level ();
}
/* We are entering the scope of a class. Clear IDENTIFIER_CLASS_VALUE
for any names in enclosing classes. */
void
clear_identifier_class_values ()
{
tree t;
if (!class_binding_level)
return;
for (t = class_binding_level->class_shadowed;
t;
t = TREE_CHAIN (t))
IDENTIFIER_CLASS_VALUE (TREE_PURPOSE (t)) = NULL_TREE;
}
/* Returns non-zero if T is a virtual function table. */
int
vtable_decl_p (t, data)
tree t;
void *data ATTRIBUTE_UNUSED;
{
return (TREE_CODE (t) == VAR_DECL && DECL_VIRTUAL_P (t));
}
/* Returns non-zero if T is a TYPE_DECL for a type with virtual
functions. */
int
vtype_decl_p (t, data)
tree t;
void *data ATTRIBUTE_UNUSED;
{
return (TREE_CODE (t) == TYPE_DECL
&& TREE_CODE (TREE_TYPE (t)) == RECORD_TYPE
&& TYPE_POLYMORPHIC_P (TREE_TYPE (t)));
}
/* Return the declarations that are members of the namespace NS. */
tree
cp_namespace_decls (ns)
tree ns;
{
return NAMESPACE_LEVEL (ns)->names;
}
/* Walk all the namespaces contained NAMESPACE, including NAMESPACE
itself, calling F for each. The DATA is passed to F as well. */
static int
walk_namespaces_r (namespace, f, data)
tree namespace;
walk_namespaces_fn f;
void *data;
{
tree current;
int result = 0;
result |= (*f) (namespace, data);
for (current = cp_namespace_decls (namespace);
current;
current = TREE_CHAIN (current))
{
if (TREE_CODE (current) != NAMESPACE_DECL
|| DECL_NAMESPACE_ALIAS (current))
continue;
/* We found a namespace. */
result |= walk_namespaces_r (current, f, data);
}
return result;
}
/* Walk all the namespaces, calling F for each. The DATA is passed to
F as well. */
int
walk_namespaces (f, data)
walk_namespaces_fn f;
void *data;
{
return walk_namespaces_r (global_namespace, f, data);
}
struct walk_globals_data {
walk_globals_pred p;
walk_globals_fn f;
void *data;
};
/* Walk the global declarations in NAMESPACE. Whenever one is found
for which P returns non-zero, call F with its address. If any call
to F returns a non-zero value, return a non-zero value. */
static int
walk_globals_r (namespace, data)
tree namespace;
void *data;
{
struct walk_globals_data* wgd = (struct walk_globals_data *) data;
walk_globals_pred p = wgd->p;
walk_globals_fn f = wgd->f;
void *d = wgd->data;
tree *t;
int result = 0;
t = &NAMESPACE_LEVEL (namespace)->names;
while (*t)
{
tree glbl = *t;
if ((*p) (glbl, d))
result |= (*f) (t, d);
/* If F changed *T, then *T still points at the next item to
examine. */
if (*t == glbl)
t = &TREE_CHAIN (*t);
}
return result;
}
/* Walk the global declarations. Whenever one is found for which P
returns non-zero, call F with its address. If any call to F
returns a non-zero value, return a non-zero value. */
int
walk_globals (p, f, data)
walk_globals_pred p;
walk_globals_fn f;
void *data;
{
struct walk_globals_data wgd;
wgd.p = p;
wgd.f = f;
wgd.data = data;
return walk_namespaces (walk_globals_r, &wgd);
}
/* Call wrapup_globals_declarations for the globals in NAMESPACE. If
DATA is non-NULL, this is the last time we will call
wrapup_global_declarations for this NAMESPACE. */
int
wrapup_globals_for_namespace (namespace, data)
tree namespace;
void *data;
{
tree globals = cp_namespace_decls (namespace);
int len = list_length (globals);
tree *vec = (tree *) alloca (sizeof (tree) * len);
int i;
int result;
tree decl;
int last_time = (data != 0);
if (last_time && namespace == global_namespace)
/* Let compile_file handle the global namespace. */
return 0;
/* Process the decls in reverse order--earliest first.
Put them into VEC from back to front, then take out from front. */
for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
vec[len - i - 1] = decl;
if (last_time)
{
check_global_declarations (vec, len);
return 0;
}
/* Temporarily mark vtables as external. That prevents
wrapup_global_declarations from writing them out; we must process
them ourselves in finish_vtable_vardecl. */
for (i = 0; i < len; ++i)
if (vtable_decl_p (vec[i], /*data=*/0) && !DECL_EXTERNAL (vec[i]))
{
DECL_NOT_REALLY_EXTERN (vec[i]) = 1;
DECL_EXTERNAL (vec[i]) = 1;
}
/* Write out any globals that need to be output. */
result = wrapup_global_declarations (vec, len);
/* Undo the hack to DECL_EXTERNAL above. */
for (i = 0; i < len; ++i)
if (vtable_decl_p (vec[i], /*data=*/0)
&& DECL_NOT_REALLY_EXTERN (vec[i]))
{
DECL_NOT_REALLY_EXTERN (vec[i]) = 0;
DECL_EXTERNAL (vec[i]) = 0;
}
return result;
}
/* Mark ARG (which is really a struct binding_level **) for GC. */
static void
mark_binding_level (arg)
void *arg;
{
struct binding_level *lvl = *(struct binding_level **)arg;
for (; lvl; lvl = lvl->level_chain)
{
ggc_mark_tree (lvl->names);
ggc_mark_tree (lvl->tags);
ggc_mark_tree (lvl->usings);
ggc_mark_tree (lvl->using_directives);
ggc_mark_tree (lvl->class_shadowed);
ggc_mark_tree (lvl->type_shadowed);
ggc_mark_tree (lvl->shadowed_labels);
ggc_mark_tree (lvl->blocks);
ggc_mark_tree (lvl->this_class);
ggc_mark_tree (lvl->incomplete);
ggc_mark_tree (lvl->dead_vars_from_for);
}
}
static void
mark_named_label_lists (labs, uses)
void *labs;
void *uses;
{
struct named_label_list *l = *(struct named_label_list **)labs;
struct named_label_use_list *u = *(struct named_label_use_list **)uses;
for (; l; l = l->next)
{
ggc_mark (l);
mark_binding_level (l->binding_level);
ggc_mark_tree (l->old_value);
ggc_mark_tree (l->label_decl);
ggc_mark_tree (l->bad_decls);
}
for (; u; u = u->next)
ggc_mark (u);
}
/* For debugging. */
static int no_print_functions = 0;
static int no_print_builtins = 0;
void
print_binding_level (lvl)
struct binding_level *lvl;
{
tree t;
int i = 0, len;
fprintf (stderr, " blocks=");
fprintf (stderr, HOST_PTR_PRINTF, lvl->blocks);
fprintf (stderr, " n_incomplete=%d parm_flag=%d keep=%d",
list_length (lvl->incomplete), lvl->parm_flag, lvl->keep);
if (lvl->tag_transparent)
fprintf (stderr, " tag-transparent");
if (lvl->more_cleanups_ok)
fprintf (stderr, " more-cleanups-ok");
if (lvl->have_cleanups)
fprintf (stderr, " have-cleanups");
fprintf (stderr, "\n");
if (lvl->names)
{
fprintf (stderr, " names:\t");
/* We can probably fit 3 names to a line? */
for (t = lvl->names; t; t = TREE_CHAIN (t))
{
if (no_print_functions && (TREE_CODE (t) == FUNCTION_DECL))
continue;
if (no_print_builtins
&& (TREE_CODE (t) == TYPE_DECL)
&& (!strcmp (DECL_SOURCE_FILE (t),"<built-in>")))
continue;
/* Function decls tend to have longer names. */
if (TREE_CODE (t) == FUNCTION_DECL)
len = 3;
else
len = 2;
i += len;
if (i > 6)
{
fprintf (stderr, "\n\t");
i = len;
}
print_node_brief (stderr, "", t, 0);
if (t == error_mark_node)
break;
}
if (i)
fprintf (stderr, "\n");
}
if (lvl->tags)
{
fprintf (stderr, " tags:\t");
i = 0;
for (t = lvl->tags; t; t = TREE_CHAIN (t))
{
if (TREE_PURPOSE (t) == NULL_TREE)
len = 3;
else if (TREE_PURPOSE (t) == TYPE_IDENTIFIER (TREE_VALUE (t)))
len = 2;
else
len = 4;
i += len;
if (i > 5)
{
fprintf (stderr, "\n\t");
i = len;
}
if (TREE_PURPOSE (t) == NULL_TREE)
{
print_node_brief (stderr, "<unnamed-typedef", TREE_VALUE (t), 0);
fprintf (stderr, ">");
}
else if (TREE_PURPOSE (t) == TYPE_IDENTIFIER (TREE_VALUE (t)))
print_node_brief (stderr, "", TREE_VALUE (t), 0);
else
{
print_node_brief (stderr, "<typedef", TREE_PURPOSE (t), 0);
print_node_brief (stderr, "", TREE_VALUE (t), 0);
fprintf (stderr, ">");
}
}
if (i)
fprintf (stderr, "\n");
}
if (lvl->class_shadowed)
{
fprintf (stderr, " class-shadowed:");
for (t = lvl->class_shadowed; t; t = TREE_CHAIN (t))
{
fprintf (stderr, " %s ", IDENTIFIER_POINTER (TREE_PURPOSE (t)));
}
fprintf (stderr, "\n");
}
if (lvl->type_shadowed)
{
fprintf (stderr, " type-shadowed:");
for (t = lvl->type_shadowed; t; t = TREE_CHAIN (t))
{
fprintf (stderr, " %s ", IDENTIFIER_POINTER (TREE_PURPOSE (t)));
}
fprintf (stderr, "\n");
}
}
void
print_other_binding_stack (stack)
struct binding_level *stack;
{
struct binding_level *level;
for (level = stack; level != global_binding_level; level = level->level_chain)
{
fprintf (stderr, "binding level ");
fprintf (stderr, HOST_PTR_PRINTF, level);
fprintf (stderr, "\n");
print_binding_level (level);
}
}
void
print_binding_stack ()
{
struct binding_level *b;
fprintf (stderr, "current_binding_level=");
fprintf (stderr, HOST_PTR_PRINTF, current_binding_level);
fprintf (stderr, "\nclass_binding_level=");
fprintf (stderr, HOST_PTR_PRINTF, class_binding_level);
fprintf (stderr, "\nglobal_binding_level=");
fprintf (stderr, HOST_PTR_PRINTF, global_binding_level);
fprintf (stderr, "\n");
if (class_binding_level)
{
for (b = class_binding_level; b; b = b->level_chain)
if (b == current_binding_level)
break;
if (b)
b = class_binding_level;
else
b = current_binding_level;
}
else
b = current_binding_level;
print_other_binding_stack (b);
fprintf (stderr, "global:\n");
print_binding_level (global_binding_level);
}
/* Namespace binding access routines: The namespace_bindings field of
the identifier is polymorphic, with three possible values:
NULL_TREE, a list of CPLUS_BINDINGS, or any other tree_node
indicating the BINDING_VALUE of global_namespace. */
/* Check whether the a binding for the name to scope is known.
Assumes that the bindings of the name are already a list
of bindings. Returns the binding found, or NULL_TREE. */
static tree
find_binding (name, scope)
tree name;
tree scope;
{
tree iter, prev = NULL_TREE;
scope = ORIGINAL_NAMESPACE (scope);
for (iter = IDENTIFIER_NAMESPACE_BINDINGS (name); iter;
iter = TREE_CHAIN (iter))
{
my_friendly_assert (TREE_CODE (iter) == CPLUS_BINDING, 374);
if (BINDING_SCOPE (iter) == scope)
{
/* Move binding found to the front of the list, so
subsequent lookups will find it faster. */
if (prev)
{
TREE_CHAIN (prev) = TREE_CHAIN (iter);
TREE_CHAIN (iter) = IDENTIFIER_NAMESPACE_BINDINGS (name);
IDENTIFIER_NAMESPACE_BINDINGS (name) = iter;
}
return iter;
}
prev = iter;
}
return NULL_TREE;
}
/* Always returns a binding for name in scope. If the
namespace_bindings is not a list, convert it to one first.
If no binding is found, make a new one. */
tree
binding_for_name (name, scope)
tree name;
tree scope;
{
tree b = IDENTIFIER_NAMESPACE_BINDINGS (name);
tree result;
scope = ORIGINAL_NAMESPACE (scope);
if (b && TREE_CODE (b) != CPLUS_BINDING)
{
/* Get rid of optimization for global scope. */
IDENTIFIER_NAMESPACE_BINDINGS (name) = NULL_TREE;
BINDING_VALUE (binding_for_name (name, global_namespace)) = b;
b = IDENTIFIER_NAMESPACE_BINDINGS (name);
}
if (b && (result = find_binding (name, scope)))
return result;
/* Not found, make a new one. */
result = make_node (CPLUS_BINDING);
TREE_CHAIN (result) = b;
IDENTIFIER_NAMESPACE_BINDINGS (name) = result;
BINDING_SCOPE (result) = scope;
BINDING_TYPE (result) = NULL_TREE;
BINDING_VALUE (result) = NULL_TREE;
return result;
}
/* Return the binding value for name in scope, considering that
namespace_binding may or may not be a list of CPLUS_BINDINGS. */
tree
namespace_binding (name, scope)
tree name;
tree scope;
{
tree b = IDENTIFIER_NAMESPACE_BINDINGS (name);
if (b == NULL_TREE)
return NULL_TREE;
if (scope == NULL_TREE)
scope = global_namespace;
if (TREE_CODE (b) != CPLUS_BINDING)
return (scope == global_namespace) ? b : NULL_TREE;
name = find_binding (name,scope);
if (name == NULL_TREE)
return name;
return BINDING_VALUE (name);
}
/* Set the binding value for name in scope. If modifying the binding
of global_namespace is attempted, try to optimize it. */
void
set_namespace_binding (name, scope, val)
tree name;
tree scope;
tree val;
{
tree b;
if (scope == NULL_TREE)
scope = global_namespace;
if (scope == global_namespace)
{
b = IDENTIFIER_NAMESPACE_BINDINGS (name);
if (b == NULL_TREE || TREE_CODE (b) != CPLUS_BINDING)
{
IDENTIFIER_NAMESPACE_BINDINGS (name) = val;
return;
}
}
b = binding_for_name (name, scope);
BINDING_VALUE (b) = val;
}
/* Push into the scope of the NAME namespace. If NAME is NULL_TREE, then we
select a name that is unique to this compilation unit. */
void
push_namespace (name)
tree name;
{
tree d = NULL_TREE;
int need_new = 1;
int implicit_use = 0;
int global = 0;
if (!global_namespace)
{
/* This must be ::. */
my_friendly_assert (name == get_identifier ("::"), 377);
global = 1;
}
else if (!name)
{
/* The name of anonymous namespace is unique for the translation
unit. */
if (!anonymous_namespace_name)
anonymous_namespace_name = get_file_function_name ('N');
name = anonymous_namespace_name;
d = IDENTIFIER_NAMESPACE_VALUE (name);
if (d)
/* Reopening anonymous namespace. */
need_new = 0;
implicit_use = 1;
}
else
{
/* Check whether this is an extended namespace definition. */
d = IDENTIFIER_NAMESPACE_VALUE (name);
if (d != NULL_TREE && TREE_CODE (d) == NAMESPACE_DECL)
{
need_new = 0;
if (DECL_NAMESPACE_ALIAS (d))
{
error ("namespace alias `%D' not allowed here, assuming `%D'",
d, DECL_NAMESPACE_ALIAS (d));
d = DECL_NAMESPACE_ALIAS (d);
}
}
}
if (need_new)
{
/* Make a new namespace, binding the name to it. */
d = build_lang_decl (NAMESPACE_DECL, name, void_type_node);
/* The global namespace is not pushed, and the global binding
level is set elsewhere. */
if (!global)
{
DECL_CONTEXT (d) = FROB_CONTEXT (current_namespace);
d = pushdecl (d);
pushlevel (0);
declare_namespace_level ();
NAMESPACE_LEVEL (d) = current_binding_level;
}
}
else
resume_binding_level (NAMESPACE_LEVEL (d));
if (implicit_use)
do_using_directive (d);
/* Enter the name space. */
current_namespace = d;
}
/* Pop from the scope of the current namespace. */
void
pop_namespace ()
{
my_friendly_assert (current_namespace != global_namespace, 20010801);
current_namespace = CP_DECL_CONTEXT (current_namespace);
/* The binding level is not popped, as it might be re-opened later. */
suspend_binding_level ();
}
/* Push into the scope of the namespace NS, even if it is deeply
nested within another namespace. */
void
push_nested_namespace (ns)
tree ns;
{
if (ns == global_namespace)
push_to_top_level ();
else
{
push_nested_namespace (CP_DECL_CONTEXT (ns));
push_namespace (DECL_NAME (ns));
}
}
/* Pop back from the scope of the namespace NS, which was previously
entered with push_nested_namespace. */
void
pop_nested_namespace (ns)
tree ns;
{
while (ns != global_namespace)
{
pop_namespace ();
ns = CP_DECL_CONTEXT (ns);
}
pop_from_top_level ();
}
/* Subroutines for reverting temporarily to top-level for instantiation
of templates and such. We actually need to clear out the class- and
local-value slots of all identifiers, so that only the global values
are at all visible. Simply setting current_binding_level to the global
scope isn't enough, because more binding levels may be pushed. */
struct saved_scope *scope_chain;
/* Mark ARG (which is really a struct saved_scope **) for GC. */
static void
mark_saved_scope (arg)
void *arg;
{
struct saved_scope *t = *(struct saved_scope **)arg;
while (t)
{
mark_binding_level (&t->class_bindings);
ggc_mark_tree (t->old_bindings);
ggc_mark_tree (t->old_namespace);
ggc_mark_tree (t->decl_ns_list);
ggc_mark_tree (t->class_name);
ggc_mark_tree (t->class_type);
ggc_mark_tree (t->access_specifier);
ggc_mark_tree (t->function_decl);
if (t->lang_base)
ggc_mark_tree_varray (t->lang_base);
ggc_mark_tree (t->lang_name);
ggc_mark_tree (t->template_parms);
ggc_mark_tree (t->x_previous_class_type);
ggc_mark_tree (t->x_previous_class_values);
ggc_mark_tree (t->x_saved_tree);
ggc_mark_tree (t->incomplete);
ggc_mark_tree (t->lookups);
mark_stmt_tree (&t->x_stmt_tree);
mark_binding_level (&t->bindings);
t = t->prev;
}
}
static tree
store_bindings (names, old_bindings)
tree names, old_bindings;
{
tree t;
tree search_bindings = old_bindings;
for (t = names; t; t = TREE_CHAIN (t))
{
tree binding, t1, id;
if (TREE_CODE (t) == TREE_LIST)
id = TREE_PURPOSE (t);
else
id = DECL_NAME (t);
if (!id
/* Note that we may have an IDENTIFIER_CLASS_VALUE even when
we have no IDENTIFIER_BINDING if we have left the class
scope, but cached the class-level declarations. */
|| !(IDENTIFIER_BINDING (id) || IDENTIFIER_CLASS_VALUE (id)))
continue;
for (t1 = search_bindings; t1; t1 = TREE_CHAIN (t1))
if (TREE_VEC_ELT (t1, 0) == id)
goto skip_it;
my_friendly_assert (TREE_CODE (id) == IDENTIFIER_NODE, 135);
binding = make_tree_vec (4);
TREE_VEC_ELT (binding, 0) = id;
TREE_VEC_ELT (binding, 1) = REAL_IDENTIFIER_TYPE_VALUE (id);
TREE_VEC_ELT (binding, 2) = IDENTIFIER_BINDING (id);
TREE_VEC_ELT (binding, 3) = IDENTIFIER_CLASS_VALUE (id);
IDENTIFIER_BINDING (id) = NULL_TREE;
IDENTIFIER_CLASS_VALUE (id) = NULL_TREE;
TREE_CHAIN (binding) = old_bindings;
old_bindings = binding;
skip_it:
;
}
return old_bindings;
}
void
maybe_push_to_top_level (pseudo)
int pseudo;
{
struct saved_scope *s;
struct binding_level *b;
tree old_bindings;
int need_pop;
s = (struct saved_scope *) xcalloc (1, sizeof (struct saved_scope));
b = scope_chain ? current_binding_level : 0;
/* If we're in the middle of some function, save our state. */
if (cfun)
{
need_pop = 1;
push_function_context_to (NULL_TREE);
}
else
need_pop = 0;
old_bindings = NULL_TREE;
if (scope_chain && previous_class_type)
old_bindings = store_bindings (previous_class_values, old_bindings);
/* Have to include global_binding_level, because class-level decls
aren't listed anywhere useful. */
for (; b; b = b->level_chain)
{
tree t;
/* Template IDs are inserted into the global level. If they were
inserted into namespace level, finish_file wouldn't find them
when doing pending instantiations. Therefore, don't stop at
namespace level, but continue until :: . */
if (b == global_binding_level || (pseudo && b->template_parms_p))
break;
old_bindings = store_bindings (b->names, old_bindings);
/* We also need to check class_shadowed to save class-level type
bindings, since pushclass doesn't fill in b->names. */
if (b->parm_flag == 2)
old_bindings = store_bindings (b->class_shadowed, old_bindings);
/* Unwind type-value slots back to top level. */
for (t = b->type_shadowed; t; t = TREE_CHAIN (t))
SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (t), TREE_VALUE (t));
}
s->prev = scope_chain;
s->old_bindings = old_bindings;
s->bindings = b;
s->need_pop_function_context = need_pop;
s->function_decl = current_function_decl;
scope_chain = s;
current_function_decl = NULL_TREE;
VARRAY_TREE_INIT (current_lang_base, 10, "current_lang_base");
current_lang_name = lang_name_cplusplus;
current_namespace = global_namespace;
}
void
push_to_top_level ()
{
maybe_push_to_top_level (0);
}
void
pop_from_top_level ()
{
struct saved_scope *s = scope_chain;
tree t;
/* Clear out class-level bindings cache. */
if (previous_class_type)
invalidate_class_lookup_cache ();
VARRAY_FREE (current_lang_base);
scope_chain = s->prev;
for (t = s->old_bindings; t; t = TREE_CHAIN (t))
{
tree id = TREE_VEC_ELT (t, 0);
SET_IDENTIFIER_TYPE_VALUE (id, TREE_VEC_ELT (t, 1));
IDENTIFIER_BINDING (id) = TREE_VEC_ELT (t, 2);
IDENTIFIER_CLASS_VALUE (id) = TREE_VEC_ELT (t, 3);
}
/* If we were in the middle of compiling a function, restore our
state. */
if (s->need_pop_function_context)
pop_function_context_from (NULL_TREE);
current_function_decl = s->function_decl;
free (s);
}
/* Push a definition of struct, union or enum tag "name".
into binding_level "b". "type" should be the type node,
We assume that the tag "name" is not already defined.
Note that the definition may really be just a forward reference.
In that case, the TYPE_SIZE will be a NULL_TREE.
C++ gratuitously puts all these tags in the name space. */
/* When setting the IDENTIFIER_TYPE_VALUE field of an identifier ID,
record the shadowed value for this binding contour. TYPE is
the type that ID maps to. */
static void
set_identifier_type_value_with_scope (id, type, b)
tree id;
tree type;
struct binding_level *b;
{
if (!b->namespace_p)
{
/* Shadow the marker, not the real thing, so that the marker
gets restored later. */
tree old_type_value = REAL_IDENTIFIER_TYPE_VALUE (id);
b->type_shadowed
= tree_cons (id, old_type_value, b->type_shadowed);
}
else
{
tree binding = binding_for_name (id, current_namespace);
BINDING_TYPE (binding) = type;
/* Store marker instead of real type. */
type = global_type_node;
}
SET_IDENTIFIER_TYPE_VALUE (id, type);
}
/* As set_identifier_type_value_with_scope, but using current_binding_level. */
void
set_identifier_type_value (id, type)
tree id;
tree type;
{
set_identifier_type_value_with_scope (id, type, current_binding_level);
}
/* Return the type associated with id. */
tree
identifier_type_value (id)
tree id;
{
/* There is no type with that name, anywhere. */
if (REAL_IDENTIFIER_TYPE_VALUE (id) == NULL_TREE)
return NULL_TREE;
/* This is not the type marker, but the real thing. */
if (REAL_IDENTIFIER_TYPE_VALUE (id) != global_type_node)
return REAL_IDENTIFIER_TYPE_VALUE (id);
/* Have to search for it. It must be on the global level, now.
Ask lookup_name not to return non-types. */
id = lookup_name_real (id, 2, 1, 0);
if (id)
return TREE_TYPE (id);
return NULL_TREE;
}
/* Pop off extraneous binding levels left over due to syntax errors.
We don't pop past namespaces, as they might be valid. */
void
pop_everything ()
{
#ifdef DEBUG_CP_BINDING_LEVELS
fprintf (stderr, "XXX entering pop_everything ()\n");
#endif
while (!toplevel_bindings_p ())
{
if (current_binding_level->parm_flag == 2)
pop_nested_class ();
else
poplevel (0, 0, 0);
}
#ifdef DEBUG_CP_BINDING_LEVELS
fprintf (stderr, "XXX leaving pop_everything ()\n");
#endif
}
/* The type TYPE is being declared. If it is a class template, or a
specialization of a class template, do any processing required and
perform error-checking. If IS_FRIEND is non-zero, this TYPE is
being declared a friend. B is the binding level at which this TYPE
should be bound.
Returns the TYPE_DECL for TYPE, which may have been altered by this
processing. */
static tree
maybe_process_template_type_declaration (type, globalize, b)
tree type;
int globalize;
struct binding_level* b;
{
tree decl = TYPE_NAME (type);
if (processing_template_parmlist)
/* You can't declare a new template type in a template parameter
list. But, you can declare a non-template type:
template <class A*> struct S;
is a forward-declaration of `A'. */
;
else
{
maybe_check_template_type (type);
my_friendly_assert (IS_AGGR_TYPE (type)
|| TREE_CODE (type) == ENUMERAL_TYPE, 0);
if (processing_template_decl)
{
/* This may change after the call to
push_template_decl_real, but we want the original value. */
tree name = DECL_NAME (decl);
decl = push_template_decl_real (decl, globalize);
/* If the current binding level is the binding level for the
template parameters (see the comment in
begin_template_parm_list) and the enclosing level is a class
scope, and we're not looking at a friend, push the
declaration of the member class into the class scope. In the
friend case, push_template_decl will already have put the
friend into global scope, if appropriate. */
if (TREE_CODE (type) != ENUMERAL_TYPE
&& !globalize && b->template_parms_p
&& b->level_chain->parm_flag == 2)
{
finish_member_declaration (CLASSTYPE_TI_TEMPLATE (type));
/* Put this tag on the list of tags for the class, since
that won't happen below because B is not the class
binding level, but is instead the pseudo-global level. */
b->level_chain->tags =
tree_cons (name, type, b->level_chain->tags);
if (!COMPLETE_TYPE_P (current_class_type))
CLASSTYPE_TAGS (current_class_type) = b->level_chain->tags;
}
}
}
return decl;
}
/* In C++, you don't have to write `struct S' to refer to `S'; you
can just use `S'. We accomplish this by creating a TYPE_DECL as
if the user had written `typedef struct S S'. Create and return
the TYPE_DECL for TYPE. */
tree
create_implicit_typedef (name, type)
tree name;
tree type;
{
tree decl;
decl = build_decl (TYPE_DECL, name, type);
DECL_ARTIFICIAL (decl) = 1;
/* There are other implicit type declarations, like the one *within*
a class that allows you to write `S::S'. We must distinguish
amongst these. */
SET_DECL_IMPLICIT_TYPEDEF_P (decl);
TYPE_NAME (type) = decl;
return decl;
}
/* Remember a local name for name-mangling purposes. */
static void
push_local_name (decl)
tree decl;
{
size_t i, nelts;
tree t, name;
if (!local_names)
VARRAY_TREE_INIT (local_names, 8, "local_names");
name = DECL_NAME (decl);
nelts = VARRAY_ACTIVE_SIZE (local_names);
for (i = 0; i < nelts; i++)
{
t = VARRAY_TREE (local_names, i);
if (DECL_NAME (t) == name)
{
if (!DECL_LANG_SPECIFIC (decl))
retrofit_lang_decl (decl);
if (DECL_LANG_SPECIFIC (t))
DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
else
DECL_DISCRIMINATOR (decl) = 1;
VARRAY_TREE (local_names, i) = decl;
return;
}
}
VARRAY_PUSH_TREE (local_names, decl);
}
/* Push a tag name NAME for struct/class/union/enum type TYPE.
Normally put it into the inner-most non-tag-transparent scope,
but if GLOBALIZE is true, put it in the inner-most non-class scope.
The latter is needed for implicit declarations. */
void
pushtag (name, type, globalize)
tree name, type;
int globalize;
{
register struct binding_level *b;
b = current_binding_level;
while (b->tag_transparent
|| (b->parm_flag == 2
&& (globalize
/* We may be defining a new type in the initializer
of a static member variable. We allow this when
not pedantic, and it is particularly useful for
type punning via an anonymous union. */
|| COMPLETE_TYPE_P (b->this_class))))
b = b->level_chain;
b->tags = tree_cons (name, type, b->tags);
if (name)
{
/* Do C++ gratuitous typedefing. */
if (IDENTIFIER_TYPE_VALUE (name) != type)
{
register tree d = NULL_TREE;
int in_class = 0;
tree context = TYPE_CONTEXT (type);
if (! context)
{
tree cs = current_scope ();
if (! globalize)
context = cs;
else if (cs != NULL_TREE && TYPE_P (cs))
/* When declaring a friend class of a local class, we want
to inject the newly named class into the scope
containing the local class, not the namespace scope. */
context = decl_function_context (get_type_decl (cs));
}
if (!context)
context = current_namespace;
if ((b->template_parms_p && b->level_chain->parm_flag == 2)
|| b->parm_flag == 2)
in_class = 1;
if (current_lang_name == lang_name_java)
TYPE_FOR_JAVA (type) = 1;
d = create_implicit_typedef (name, type);
DECL_CONTEXT (d) = FROB_CONTEXT (context);
if (! in_class)
set_identifier_type_value_with_scope (name, type, b);
d = maybe_process_template_type_declaration (type,
globalize, b);
if (b->parm_flag == 2)
{
if (!PROCESSING_REAL_TEMPLATE_DECL_P ())
/* Put this TYPE_DECL on the TYPE_FIELDS list for the
class. But if it's a member template class, we
want the TEMPLATE_DECL, not the TYPE_DECL, so this
is done later. */
finish_member_declaration (d);
else
pushdecl_class_level (d);
}
else
d = pushdecl_with_scope (d, b);
/* FIXME what if it gets a name from typedef? */
if (ANON_AGGRNAME_P (name))
DECL_IGNORED_P (d) = 1;
TYPE_CONTEXT (type) = DECL_CONTEXT (d);
/* If this is a local class, keep track of it. We need this
information for name-mangling, and so that it is possible to find
all function definitions in a translation unit in a convenient
way. (It's otherwise tricky to find a member function definition
it's only pointed to from within a local class.) */
if (TYPE_CONTEXT (type)
&& TREE_CODE (TYPE_CONTEXT (type)) == FUNCTION_DECL
&& !processing_template_decl)
VARRAY_PUSH_TREE (local_classes, type);
}
if (b->parm_flag == 2)
{
if (!COMPLETE_TYPE_P (current_class_type))
CLASSTYPE_TAGS (current_class_type) = b->tags;
}
}
if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL)
/* Use the canonical TYPE_DECL for this node. */
TYPE_STUB_DECL (type) = TYPE_NAME (type);
else
{
/* Create a fake NULL-named TYPE_DECL node whose TREE_TYPE
will be the tagged type we just added to the current
binding level. This fake NULL-named TYPE_DECL node helps
dwarfout.c to know when it needs to output a
representation of a tagged type, and it also gives us a
convenient place to record the "scope start" address for
the tagged type. */
tree d = build_decl (TYPE_DECL, NULL_TREE, type);
TYPE_STUB_DECL (type) = pushdecl_with_scope (d, b);
}
}
/* Counter used to create anonymous type names. */
static int anon_cnt = 0;
/* Return an IDENTIFIER which can be used as a name for
anonymous structs and unions. */
tree
make_anon_name ()
{
char buf[32];
sprintf (buf, ANON_AGGRNAME_FORMAT, anon_cnt++);
return get_identifier (buf);
}
/* Clear the TREE_PURPOSE slot of tags which have anonymous typenames.
This keeps dbxout from getting confused. */
void
clear_anon_tags ()
{
register struct binding_level *b;
register tree tags;
static int last_cnt = 0;
/* Fast out if no new anon names were declared. */
if (last_cnt == anon_cnt)
return;
b = current_binding_level;
while (b->tag_transparent)
b = b->level_chain;
tags = b->tags;
while (tags)
{
/* A NULL purpose means we have already processed all tags
from here to the end of the list. */
if (TREE_PURPOSE (tags) == NULL_TREE)
break;
if (ANON_AGGRNAME_P (TREE_PURPOSE (tags)))
TREE_PURPOSE (tags) = NULL_TREE;
tags = TREE_CHAIN (tags);
}
last_cnt = anon_cnt;
}
/* Subroutine of duplicate_decls: return truthvalue of whether
or not types of these decls match.
For C++, we must compare the parameter list so that `int' can match
`int&' in a parameter position, but `int&' is not confused with
`const int&'. */
int
decls_match (newdecl, olddecl)
tree newdecl, olddecl;
{
int types_match;
if (newdecl == olddecl)
return 1;
if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
/* If the two DECLs are not even the same kind of thing, we're not
interested in their types. */
return 0;
if (TREE_CODE (newdecl) == FUNCTION_DECL)
{
tree f1 = TREE_TYPE (newdecl);
tree f2 = TREE_TYPE (olddecl);
tree p1 = TYPE_ARG_TYPES (f1);
tree p2 = TYPE_ARG_TYPES (f2);
if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
&& ! (DECL_EXTERN_C_P (newdecl)
&& DECL_EXTERN_C_P (olddecl)))
return 0;
if (TREE_CODE (f1) != TREE_CODE (f2))
return 0;
if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
{
if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
&& (DECL_BUILT_IN (olddecl)
#ifndef NO_IMPLICIT_EXTERN_C
|| (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
|| (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
#endif
))
{
types_match = self_promoting_args_p (p1);
if (p1 == void_list_node)
TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
}
#ifndef NO_IMPLICIT_EXTERN_C
else if (p1 == NULL_TREE
&& (DECL_EXTERN_C_P (olddecl)
&& DECL_IN_SYSTEM_HEADER (olddecl)
&& !DECL_CLASS_SCOPE_P (olddecl))
&& (DECL_EXTERN_C_P (newdecl)
&& DECL_IN_SYSTEM_HEADER (newdecl)
&& !DECL_CLASS_SCOPE_P (newdecl)))
{
types_match = self_promoting_args_p (p2);
TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
}
#endif
else
types_match = compparms (p1, p2);
}
else
types_match = 0;
}
else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
{
if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
DECL_TEMPLATE_PARMS (olddecl)))
return 0;
if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
!= TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
return 0;
if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
types_match = 1;
else
types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
DECL_TEMPLATE_RESULT (newdecl));
}
else
{
if (TREE_TYPE (newdecl) == error_mark_node)
types_match = TREE_TYPE (olddecl) == error_mark_node;
else if (TREE_TYPE (olddecl) == NULL_TREE)
types_match = TREE_TYPE (newdecl) == NULL_TREE;
else if (TREE_TYPE (newdecl) == NULL_TREE)
types_match = 0;
else
types_match = comptypes (TREE_TYPE (newdecl),
TREE_TYPE (olddecl),
COMPARE_REDECLARATION);
}
return types_match;
}
/* If NEWDECL is `static' and an `extern' was seen previously,
warn about it. OLDDECL is the previous declaration.
Note that this does not apply to the C++ case of declaring
a variable `extern const' and then later `const'.
Don't complain about built-in functions, since they are beyond
the user's control. */
static void
warn_extern_redeclared_static (newdecl, olddecl)
tree newdecl, olddecl;
{
static const char *const explicit_extern_static_warning
= "`%D' was declared `extern' and later `static'";
static const char *const implicit_extern_static_warning
= "`%D' was declared implicitly `extern' and later `static'";
tree name;
if (TREE_CODE (newdecl) == TYPE_DECL
|| TREE_CODE (newdecl) == TEMPLATE_DECL
|| TREE_CODE (newdecl) == CONST_DECL)
return;
/* Don't get confused by static member functions; that's a different
use of `static'. */
if (TREE_CODE (newdecl) == FUNCTION_DECL
&& DECL_STATIC_FUNCTION_P (newdecl))
return;
/* If the old declaration was `static', or the new one isn't, then
then everything is OK. */
if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
return;
/* It's OK to declare a builtin function as `static'. */
if (TREE_CODE (olddecl) == FUNCTION_DECL
&& DECL_ARTIFICIAL (olddecl))
return;
name = DECL_ASSEMBLER_NAME (newdecl);
pedwarn (IDENTIFIER_IMPLICIT_DECL (name)
? implicit_extern_static_warning
: explicit_extern_static_warning, newdecl);
cp_pedwarn_at ("previous declaration of `%D'", olddecl);
}
/* Handle when a new declaration NEWDECL has the same name as an old
one OLDDECL in the same binding contour. Prints an error message
if appropriate.
If safely possible, alter OLDDECL to look like NEWDECL, and return 1.
Otherwise, return 0. */
int
duplicate_decls (newdecl, olddecl)
tree newdecl, olddecl;
{
unsigned olddecl_uid = DECL_UID (olddecl);
int olddecl_friend = 0, types_match = 0;
int new_defines_function = 0;
if (newdecl == olddecl)
return 1;
types_match = decls_match (newdecl, olddecl);
/* If either the type of the new decl or the type of the old decl is an
error_mark_node, then that implies that we have already issued an
error (earlier) for some bogus type specification, and in that case,
it is rather pointless to harass the user with yet more error message
about the same declaration, so just pretend the types match here. */
if (TREE_TYPE (newdecl) == error_mark_node
|| TREE_TYPE (olddecl) == error_mark_node)
types_match = 1;
if (DECL_P (olddecl)
&& TREE_CODE (newdecl) == FUNCTION_DECL
&& TREE_CODE (olddecl) == FUNCTION_DECL
&& (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
{
if (DECL_DECLARED_INLINE_P (newdecl)
&& DECL_UNINLINABLE (newdecl)
&& lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
/* Already warned elsewhere. */;
else if (DECL_DECLARED_INLINE_P (olddecl)
&& DECL_UNINLINABLE (olddecl)
&& lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
/* Already warned. */;
else if (DECL_DECLARED_INLINE_P (newdecl)
&& DECL_UNINLINABLE (olddecl)
&& lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
{
warning_with_decl (newdecl,
"function `%s' redeclared as inline");
warning_with_decl (olddecl,
"previous declaration of function `%s' with attribute noinline");
}
else if (DECL_DECLARED_INLINE_P (olddecl)
&& DECL_UNINLINABLE (newdecl)
&& lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
{
warning_with_decl (newdecl,
"function `%s' redeclared with attribute noinline");
warning_with_decl (olddecl,
"previous declaration of function `%s' was inline");
}
}
/* Check for redeclaration and other discrepancies. */
if (TREE_CODE (olddecl) == FUNCTION_DECL
&& DECL_ARTIFICIAL (olddecl))
{
if (TREE_CODE (newdecl) != FUNCTION_DECL)
{
/* If you declare a built-in or predefined function name as static,
the old definition is overridden, but optionally warn this was a
bad choice of name. */
if (! TREE_PUBLIC (newdecl))
{
if (warn_shadow)
warning ("shadowing %s function `%#D'",
DECL_BUILT_IN (olddecl) ? "built-in" : "library",
olddecl);
/* Discard the old built-in function. */
return 0;
}
/* If the built-in is not ansi, then programs can override
it even globally without an error. */
else if (! DECL_BUILT_IN (olddecl))
warning ("library function `%#D' redeclared as non-function `%#D'",
olddecl, newdecl);
else
{
error ("declaration of `%#D'", newdecl);
error ("conflicts with built-in declaration `%#D'",
olddecl);
}
return 0;
}
else if (!types_match)
{
if ((DECL_EXTERN_C_P (newdecl)
&& DECL_EXTERN_C_P (olddecl))
|| compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
{
/* A near match; override the builtin. */
if (TREE_PUBLIC (newdecl))
{
warning ("new declaration `%#D'", newdecl);
warning ("ambiguates built-in declaration `%#D'",
olddecl);
}
else if (warn_shadow)
warning ("shadowing %s function `%#D'",
DECL_BUILT_IN (olddecl) ? "built-in" : "library",
olddecl);
}
else
/* Discard the old built-in function. */
return 0;
}
if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
{
/* If a builtin function is redeclared as `static', merge
the declarations, but make the original one static. */
DECL_THIS_STATIC (olddecl) = 1;
TREE_PUBLIC (olddecl) = 0;
/* Make the old declaration consistent with the new one so
that all remnants of the builtin-ness of this function
will be banished. */
SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
SET_DECL_RTL (olddecl, DECL_RTL (newdecl));
COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
SET_IDENTIFIER_GLOBAL_VALUE (DECL_ASSEMBLER_NAME (newdecl),
newdecl);
}
}
else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
{
if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
&& TREE_CODE (newdecl) != TYPE_DECL
&& ! (TREE_CODE (newdecl) == TEMPLATE_DECL
&& TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL))
|| (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
&& TREE_CODE (olddecl) != TYPE_DECL
&& ! (TREE_CODE (olddecl) == TEMPLATE_DECL
&& (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
== TYPE_DECL))))
{
/* We do nothing special here, because C++ does such nasty
things with TYPE_DECLs. Instead, just let the TYPE_DECL
get shadowed, and know that if we need to find a TYPE_DECL
for a given name, we can look in the IDENTIFIER_TYPE_VALUE
slot of the identifier. */
return 0;
}
if ((TREE_CODE (newdecl) == FUNCTION_DECL
&& DECL_FUNCTION_TEMPLATE_P (olddecl))
|| (TREE_CODE (olddecl) == FUNCTION_DECL
&& DECL_FUNCTION_TEMPLATE_P (newdecl)))
return 0;
error ("`%#D' redeclared as different kind of symbol", newdecl);
if (TREE_CODE (olddecl) == TREE_LIST)
olddecl = TREE_VALUE (olddecl);
cp_error_at ("previous declaration of `%#D'", olddecl);
/* New decl is completely inconsistent with the old one =>
tell caller to replace the old one. */
return 0;
}
else if (!types_match)
{
if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
/* These are certainly not duplicate declarations; they're
from different scopes. */
return 0;
if (TREE_CODE (newdecl) == TEMPLATE_DECL)
{
/* The name of a class template may not be declared to refer to
any other template, class, function, object, namespace, value,
or type in the same scope. */
if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
|| TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
{
error ("declaration of template `%#D'", newdecl);
cp_error_at ("conflicts with previous declaration `%#D'",
olddecl);
}
else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
&& TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
&& compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
&& comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
DECL_TEMPLATE_PARMS (olddecl)))
{
error ("new declaration `%#D'", newdecl);
cp_error_at ("ambiguates old declaration `%#D'", olddecl);
}
return 0;
}
if (TREE_CODE (newdecl) == FUNCTION_DECL)
{
if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
{
error ("declaration of C function `%#D' conflicts with",
newdecl);
cp_error_at ("previous declaration `%#D' here", olddecl);
}
else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
{
error ("new declaration `%#D'", newdecl);
cp_error_at ("ambiguates old declaration `%#D'", olddecl);
}
else
return 0;
}
/* Already complained about this, so don't do so again. */
else if (current_class_type == NULL_TREE
|| IDENTIFIER_ERROR_LOCUS (DECL_ASSEMBLER_NAME (newdecl)) != current_class_type)
{
error ("conflicting types for `%#D'", newdecl);
cp_error_at ("previous declaration as `%#D'", olddecl);
}
}
else if (TREE_CODE (newdecl) == FUNCTION_DECL
&& ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
&& (!DECL_TEMPLATE_INFO (newdecl)
|| (DECL_TI_TEMPLATE (newdecl)
!= DECL_TI_TEMPLATE (olddecl))))
|| (DECL_TEMPLATE_SPECIALIZATION (newdecl)
&& (!DECL_TEMPLATE_INFO (olddecl)
|| (DECL_TI_TEMPLATE (olddecl)
!= DECL_TI_TEMPLATE (newdecl))))))
/* It's OK to have a template specialization and a non-template
with the same type, or to have specializations of two
different templates with the same type. Note that if one is a
specialization, and the other is an instantiation of the same
template, that we do not exit at this point. That situation
can occur if we instantiate a template class, and then
specialize one of its methods. This situation is legal, but
the declarations must be merged in the usual way. */
return 0;
else if (TREE_CODE (newdecl) == FUNCTION_DECL
&& ((DECL_TEMPLATE_INSTANTIATION (olddecl)
&& !DECL_USE_TEMPLATE (newdecl))
|| (DECL_TEMPLATE_INSTANTIATION (newdecl)
&& !DECL_USE_TEMPLATE (olddecl))))
/* One of the declarations is a template instantiation, and the
other is not a template at all. That's OK. */
return 0;
else if (TREE_CODE (newdecl) == NAMESPACE_DECL
&& DECL_NAMESPACE_ALIAS (newdecl)
&& DECL_NAMESPACE_ALIAS (newdecl) == DECL_NAMESPACE_ALIAS (olddecl))
/* Redeclaration of namespace alias, ignore it. */
return 1;
else
{
const char *errmsg = redeclaration_error_message (newdecl, olddecl);
if (errmsg)
{
error (errmsg, newdecl);
if (DECL_NAME (olddecl) != NULL_TREE)
cp_error_at ((DECL_INITIAL (olddecl)
&& namespace_bindings_p ())
? "`%#D' previously defined here"
: "`%#D' previously declared here", olddecl);
}
else if (TREE_CODE (olddecl) == FUNCTION_DECL
&& DECL_INITIAL (olddecl) != NULL_TREE
&& TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
&& TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
{
/* Prototype decl follows defn w/o prototype. */
cp_warning_at ("prototype for `%#D'", newdecl);
cp_warning_at ("follows non-prototype definition here", olddecl);
}
else if (TREE_CODE (olddecl) == FUNCTION_DECL
&& DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
{
/* extern "C" int foo ();
int foo () { bar (); }
is OK. */
if (current_lang_depth () == 0)
SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
else
{
cp_error_at ("previous declaration of `%#D' with %L linkage",
olddecl, DECL_LANGUAGE (olddecl));
error ("conflicts with new declaration with %L linkage",
DECL_LANGUAGE (newdecl));
}
}
if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
;
else if (TREE_CODE (olddecl) == FUNCTION_DECL)
{
tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
int i = 1;
if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
for (; t1 && t1 != void_list_node;
t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
{
if (1 == simple_cst_equal (TREE_PURPOSE (t1),
TREE_PURPOSE (t2)))
{
if (pedantic)
{
pedwarn ("default argument given for parameter %d of `%#D'",
i, newdecl);
cp_pedwarn_at ("after previous specification in `%#D'",
olddecl);
}
}
else
{
error ("default argument given for parameter %d of `%#D'",
i, newdecl);
cp_error_at ("after previous specification in `%#D'",
olddecl);
}
}
if (DECL_DECLARED_INLINE_P (newdecl)
&& ! DECL_DECLARED_INLINE_P (olddecl)
&& TREE_ADDRESSABLE (olddecl) && warn_inline)
{
warning ("`%#D' was used before it was declared inline",
newdecl);
cp_warning_at ("previous non-inline declaration here",
olddecl);
}
}
}
/* If new decl is `static' and an `extern' was seen previously,
warn about it. */
warn_extern_redeclared_static (newdecl, olddecl);
/* We have committed to returning 1 at this point. */
if (TREE_CODE (newdecl) == FUNCTION_DECL)
{
/* Now that functions must hold information normally held
by field decls, there is extra work to do so that
declaration information does not get destroyed during
definition. */
if (DECL_VINDEX (olddecl))
DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
if (DECL_VIRTUAL_CONTEXT (olddecl))
DECL_VIRTUAL_CONTEXT (newdecl) = DECL_VIRTUAL_CONTEXT (olddecl);
if (DECL_CONTEXT (olddecl))
DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
DECL_NEEDS_FINAL_OVERRIDER_P (newdecl) |= DECL_NEEDS_FINAL_OVERRIDER_P (olddecl);
DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
SET_OVERLOADED_OPERATOR_CODE
(newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
/* Optionally warn about more than one declaration for the same
name, but don't warn about a function declaration followed by a
definition. */
if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
&& !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
/* Don't warn about extern decl followed by definition. */
&& !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
/* Don't warn about friends, let add_friend take care of it. */
&& ! (DECL_FRIEND_P (newdecl) || DECL_FRIEND_P (olddecl)))
{
warning ("redundant redeclaration of `%D' in same scope", newdecl);
cp_warning_at ("previous declaration of `%D'", olddecl);
}
}
/* Deal with C++: must preserve virtual function table size. */
if (TREE_CODE (olddecl) == TYPE_DECL)
{
register tree newtype = TREE_TYPE (newdecl);
register tree oldtype = TREE_TYPE (olddecl);
if (newtype != error_mark_node && oldtype != error_mark_node
&& TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
{
CLASSTYPE_VSIZE (newtype) = CLASSTYPE_VSIZE (oldtype);
CLASSTYPE_FRIEND_CLASSES (newtype)
= CLASSTYPE_FRIEND_CLASSES (oldtype);
}
DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
}
/* Copy all the DECL_... slots specified in the new decl
except for any that we copy here from the old type. */
DECL_ATTRIBUTES (newdecl)
= (*targetm.merge_decl_attributes) (olddecl, newdecl);
if (TREE_CODE (newdecl) == TEMPLATE_DECL)
{
TREE_TYPE (olddecl) = TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl));
DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
= chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
/* If the new declaration is a definition, update the file and
line information on the declaration. */
if (DECL_INITIAL (DECL_TEMPLATE_RESULT (olddecl)) == NULL_TREE
&& DECL_INITIAL (DECL_TEMPLATE_RESULT (newdecl)) != NULL_TREE)
{
DECL_SOURCE_LINE (olddecl)
= DECL_SOURCE_LINE (DECL_TEMPLATE_RESULT (olddecl))
= DECL_SOURCE_LINE (newdecl);
DECL_SOURCE_FILE (olddecl)
= DECL_SOURCE_FILE (DECL_TEMPLATE_RESULT (olddecl))
= DECL_SOURCE_FILE (newdecl);
}
return 1;
}
if (types_match)
{
/* Automatically handles default parameters. */
tree oldtype = TREE_TYPE (olddecl);
tree newtype;
/* Merge the data types specified in the two decls. */
newtype = common_type (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
/* If common_type produces a non-typedef type, just use the old type. */
if (TREE_CODE (newdecl) == TYPE_DECL
&& newtype == DECL_ORIGINAL_TYPE (newdecl))
newtype = oldtype;
if (TREE_CODE (newdecl) == VAR_DECL)
DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
/* Do this after calling `common_type' so that default
parameters don't confuse us. */
else if (TREE_CODE (newdecl) == FUNCTION_DECL
&& (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl))
!= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl))))
{
TREE_TYPE (newdecl) = build_exception_variant (newtype,
TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)));
TREE_TYPE (olddecl) = build_exception_variant (newtype,
TYPE_RAISES_EXCEPTIONS (oldtype));
if ((pedantic || ! DECL_IN_SYSTEM_HEADER (olddecl))
&& DECL_SOURCE_LINE (olddecl) != 0
&& flag_exceptions
&& !comp_except_specs (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)),
TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl)), 1))
{
error ("declaration of `%F' throws different exceptions",
newdecl);
cp_error_at ("than previous declaration `%F'", olddecl);
}
}
TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
/* Lay the type out, unless already done. */
if (! same_type_p (newtype, oldtype)
&& TREE_TYPE (newdecl) != error_mark_node
&& !(processing_template_decl && uses_template_parms (newdecl)))
layout_type (TREE_TYPE (newdecl));
if ((TREE_CODE (newdecl) == VAR_DECL
|| TREE_CODE (newdecl) == PARM_DECL
|| TREE_CODE (newdecl) == RESULT_DECL
|| TREE_CODE (newdecl) == FIELD_DECL
|| TREE_CODE (newdecl) == TYPE_DECL)
&& !(processing_template_decl && uses_template_parms (newdecl)))
layout_decl (newdecl, 0);
/* Merge the type qualifiers. */
if (TREE_READONLY (newdecl))
TREE_READONLY (olddecl) = 1;
if (TREE_THIS_VOLATILE (newdecl))
TREE_THIS_VOLATILE (olddecl) = 1;
/* Merge the initialization information. */
if (DECL_INITIAL (newdecl) == NULL_TREE
&& DECL_INITIAL (olddecl) != NULL_TREE)
{
DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
DECL_SOURCE_FILE (newdecl) = DECL_SOURCE_FILE (olddecl);
DECL_SOURCE_LINE (newdecl) = DECL_SOURCE_LINE (olddecl);
if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
&& DECL_LANG_SPECIFIC (newdecl)
&& DECL_LANG_SPECIFIC (olddecl))
DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
}
/* Merge the section attribute.
We want to issue an error if the sections conflict but that must be
done later in decl_attributes since we are called before attributes
are assigned. */
if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
/* Keep the old rtl since we can safely use it. */
COPY_DECL_RTL (olddecl, newdecl);
if (TREE_CODE (newdecl) == FUNCTION_DECL)
{
DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
|= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
DECL_NO_LIMIT_STACK (newdecl)
|= DECL_NO_LIMIT_STACK (olddecl);
}
}
/* If cannot merge, then use the new type and qualifiers,
and don't preserve the old rtl. */
else
{
/* Clean out any memory we had of the old declaration. */
tree oldstatic = value_member (olddecl, static_aggregates);
if (oldstatic)
TREE_VALUE (oldstatic) = error_mark_node;
TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
}
/* Merge the storage class information. */
DECL_WEAK (newdecl) |= DECL_WEAK (olddecl);
DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
if (! DECL_EXTERNAL (olddecl))
DECL_EXTERNAL (newdecl) = 0;
if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
{
DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
DECL_TEMPLATE_INSTANTIATED (newdecl)
|= DECL_TEMPLATE_INSTANTIATED (olddecl);
/* Don't really know how much of the language-specific
values we should copy from old to new. */
DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
DECL_ACCESS (newdecl) = DECL_ACCESS (olddecl);
DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
DECL_INITIALIZED_IN_CLASS_P (newdecl)
|= DECL_INITIALIZED_IN_CLASS_P (olddecl);
olddecl_friend = DECL_FRIEND_P (olddecl);
/* Only functions have DECL_BEFRIENDING_CLASSES. */
if (TREE_CODE (newdecl) == FUNCTION_DECL
|| DECL_FUNCTION_TEMPLATE_P (newdecl))
DECL_BEFRIENDING_CLASSES (newdecl)
= chainon (DECL_BEFRIENDING_CLASSES (newdecl),
DECL_BEFRIENDING_CLASSES (olddecl));
}
if (TREE_CODE (newdecl) == FUNCTION_DECL)
{
if (DECL_TEMPLATE_INSTANTIATION (olddecl)
&& !DECL_TEMPLATE_INSTANTIATION (newdecl))
{
/* If newdecl is not a specialization, then it is not a
template-related function at all. And that means that we
shoud have exited above, returning 0. */
my_friendly_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl),
0);
if (TREE_USED (olddecl))
/* From [temp.expl.spec]:
If a template, a member template or the member of a class
template is explicitly specialized then that
specialization shall be declared before the first use of
that specialization that would cause an implicit
instantiation to take place, in every translation unit in
which such a use occurs. */
error ("explicit specialization of %D after first use",
olddecl);
SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
}
DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
/* If either decl says `inline', this fn is inline, unless its
definition was passed already. */
if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
DECL_INLINE (olddecl) = 1;
DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
= (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
/* Preserve abstractness on cloned [cd]tors. */
DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
if (! types_match)
{
SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
SET_DECL_RTL (olddecl, DECL_RTL (newdecl));
}
if (! types_match || new_defines_function)
{
/* These need to be copied so that the names are available.
Note that if the types do match, we'll preserve inline
info and other bits, but if not, we won't. */
DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
}
if (new_defines_function)
/* If defining a function declared with other language
linkage, use the previously declared language linkage. */
SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
else if (types_match)
{
/* If redeclaring a builtin function, and not a definition,
it stays built in. */
if (DECL_BUILT_IN (olddecl))
{
DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
/* If we're keeping the built-in definition, keep the rtl,
regardless of declaration matches. */
SET_DECL_RTL (newdecl, DECL_RTL (olddecl));
}
else
DECL_NUM_STMTS (newdecl) = DECL_NUM_STMTS (olddecl);
DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
/* Don't clear out the arguments if we're redefining a function. */
if (DECL_ARGUMENTS (olddecl))
DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
}
}
else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
/* Now preserve various other info from the definition. */
TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
if (TREE_CODE (newdecl) == FUNCTION_DECL)
{
int function_size;
function_size = sizeof (struct tree_decl);
memcpy ((char *) olddecl + sizeof (struct tree_common),
(char *) newdecl + sizeof (struct tree_common),
function_size - sizeof (struct tree_common));
if (DECL_TEMPLATE_INSTANTIATION (newdecl))
{
/* If newdecl is a template instantiation, it is possible that
the following sequence of events has occurred:
o A friend function was declared in a class template. The
class template was instantiated.
o The instantiation of the friend declaration was
recorded on the instantiation list, and is newdecl.
o Later, however, instantiate_class_template called pushdecl
on the newdecl to perform name injection. But, pushdecl in
turn called duplicate_decls when it discovered that another
declaration of a global function with the same name already
existed.
o Here, in duplicate_decls, we decided to clobber newdecl.
If we're going to do that, we'd better make sure that
olddecl, and not newdecl, is on the list of
instantiations so that if we try to do the instantiation
again we won't get the clobbered declaration. */
tree tmpl = DECL_TI_TEMPLATE (newdecl);
tree decls = DECL_TEMPLATE_SPECIALIZATIONS (tmpl);
for (; decls; decls = TREE_CHAIN (decls))
if (TREE_VALUE (decls) == newdecl)
TREE_VALUE (decls) = olddecl;
}
}
else
{
memcpy ((char *) olddecl + sizeof (struct tree_common),
(char *) newdecl + sizeof (struct tree_common),
sizeof (struct tree_decl) - sizeof (struct tree_common)
+ tree_code_length [(int)TREE_CODE (newdecl)] * sizeof (char *));
}
DECL_UID (olddecl) = olddecl_uid;
if (olddecl_friend)
DECL_FRIEND_P (olddecl) = 1;
/* NEWDECL contains the merged attribute lists.
Update OLDDECL to be the same. */
DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
return 1;
}
/* Record a decl-node X as belonging to the current lexical scope.
Check for errors (such as an incompatible declaration for the same
name already seen in the same scope).
Returns either X or an old decl for the same name.
If an old decl is returned, it may have been smashed
to agree with what X says. */
tree
pushdecl (x)
tree x;
{
register tree t;
register tree name;
int need_new_binding;
/* We shouldn't be calling pushdecl when we're generating RTL for a
function that we already did semantic analysis on previously. */
my_friendly_assert (!cfun || doing_semantic_analysis_p (),
19990913);
need_new_binding = 1;
if (DECL_TEMPLATE_PARM_P (x))
/* Template parameters have no context; they are not X::T even
when declared within a class or namespace. */
;
else
{
if (current_function_decl && x != current_function_decl
/* A local declaration for a function doesn't constitute
nesting. */
&& !(TREE_CODE (x) == FUNCTION_DECL && !DECL_INITIAL (x))
/* A local declaration for an `extern' variable is in the
scope of the current namespace, not the current
function. */
&& !(TREE_CODE (x) == VAR_DECL && DECL_EXTERNAL (x))
&& !DECL_CONTEXT (x))
DECL_CONTEXT (x) = current_function_decl;
/* If this is the declaration for a namespace-scope function,
but the declaration itself is in a local scope, mark the
declaration. */
if (TREE_CODE (x) == FUNCTION_DECL
&& DECL_NAMESPACE_SCOPE_P (x)
&& current_function_decl
&& x != current_function_decl)
DECL_LOCAL_FUNCTION_P (x) = 1;
}
name = DECL_NAME (x);
if (name)
{
int different_binding_level = 0;
if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
name = TREE_OPERAND (name, 0);
/* In case this decl was explicitly namespace-qualified, look it
up in its namespace context. */
if (TREE_CODE (x) == VAR_DECL && DECL_NAMESPACE_SCOPE_P (x)
&& namespace_bindings_p ())
t = namespace_binding (name, DECL_CONTEXT (x));
else
t = lookup_name_current_level (name);
/* [basic.link] If there is a visible declaration of an entity
with linkage having the same name and type, ignoring entities
declared outside the innermost enclosing namespace scope, the
block scope declaration declares that same entity and
receives the linkage of the previous declaration. */
if (! t && current_function_decl && x != current_function_decl
&& (TREE_CODE (x) == FUNCTION_DECL || TREE_CODE (x) == VAR_DECL)
&& DECL_EXTERNAL (x))
{
/* Look in block scope. */
t = IDENTIFIER_VALUE (name);
/* Or in the innermost namespace. */
if (! t)
t = namespace_binding (name, DECL_CONTEXT (x));
/* Does it have linkage? Note that if this isn't a DECL, it's an
OVERLOAD, which is OK. */
if (t && DECL_P (t) && ! (TREE_STATIC (t) || DECL_EXTERNAL (t)))
t = NULL_TREE;
if (t)
different_binding_level = 1;
}
/* If we are declaring a function, and the result of name-lookup
was an OVERLOAD, look for an overloaded instance that is
actually the same as the function we are declaring. (If
there is one, we have to merge our declaration with the
previous declaration.) */
if (t && TREE_CODE (t) == OVERLOAD)
{
tree match;
if (TREE_CODE (x) == FUNCTION_DECL)
for (match = t; match; match = OVL_NEXT (match))
{
if (decls_match (OVL_CURRENT (match), x))
break;
}
else
/* Just choose one. */
match = t;
if (match)
t = OVL_CURRENT (match);
else
t = NULL_TREE;
}
if (t == error_mark_node)
{
/* error_mark_node is 0 for a while during initialization! */
t = NULL_TREE;
cp_error_at ("`%#D' used prior to declaration", x);
}
else if (t != NULL_TREE)
{
if (different_binding_level)
{
if (decls_match (x, t))
/* The standard only says that the local extern
inherits linkage from the previous decl; in
particular, default args are not shared. It would
be nice to propagate inlining info, though. FIXME. */
TREE_PUBLIC (x) = TREE_PUBLIC (t);
}
else if (TREE_CODE (t) == PARM_DECL)
{
if (DECL_CONTEXT (t) == NULL_TREE)
/* This is probaby caused by too many errors, but calling
abort will say that if errors have occurred. */
abort ();
/* Check for duplicate params. */
if (duplicate_decls (x, t))
return t;
}
else if ((DECL_EXTERN_C_FUNCTION_P (x)
|| DECL_FUNCTION_TEMPLATE_P (x))
&& is_overloaded_fn (t))
/* Don't do anything just yet. */;
else if (t == wchar_decl_node)
{
if (pedantic && ! DECL_IN_SYSTEM_HEADER (x))
pedwarn ("redeclaration of `wchar_t' as `%T'",
TREE_TYPE (x));
/* Throw away the redeclaration. */
return t;
}
else if (TREE_CODE (t) != TREE_CODE (x))
{
if (duplicate_decls (x, t))
return t;
}
else if (duplicate_decls (x, t))
{
if (TREE_CODE (t) == TYPE_DECL)
SET_IDENTIFIER_TYPE_VALUE (name, TREE_TYPE (t));
else if (TREE_CODE (t) == FUNCTION_DECL)
check_default_args (t);
return t;
}
else if (DECL_MAIN_P (x))
{
/* A redeclaration of main, but not a duplicate of the
previous one.
[basic.start.main]
This function shall not be overloaded. */
cp_error_at ("invalid redeclaration of `%D'", t);
error ("as `%D'", x);
/* We don't try to push this declaration since that
causes a crash. */
return x;
}
}
check_template_shadow (x);
/* If this is a function conjured up by the backend, massage it
so it looks friendly. */
if (DECL_NON_THUNK_FUNCTION_P (x) && ! DECL_LANG_SPECIFIC (x))
{
retrofit_lang_decl (x);
SET_DECL_LANGUAGE (x, lang_c);
}
if (DECL_NON_THUNK_FUNCTION_P (x) && ! DECL_FUNCTION_MEMBER_P (x))
{
t = push_overloaded_decl (x, PUSH_LOCAL);
if (t != x)
return t;
if (!namespace_bindings_p ())
/* We do not need to create a binding for this name;
push_overloaded_decl will have already done so if
necessary. */
need_new_binding = 0;
}
else if (DECL_FUNCTION_TEMPLATE_P (x) && DECL_NAMESPACE_SCOPE_P (x))
{
t = push_overloaded_decl (x, PUSH_GLOBAL);
if (t == x)
add_decl_to_level (x, NAMESPACE_LEVEL (CP_DECL_CONTEXT (t)));
return t;
}
/* If declaring a type as a typedef, copy the type (unless we're
at line 0), and install this TYPE_DECL as the new type's typedef
name. See the extensive comment in ../c-decl.c (pushdecl). */
if (TREE_CODE (x) == TYPE_DECL)
{
tree type = TREE_TYPE (x);
if (DECL_SOURCE_LINE (x) == 0)
{
if (TYPE_NAME (type) == 0)
TYPE_NAME (type) = x;
}
else if (type != error_mark_node && TYPE_NAME (type) != x
/* We don't want to copy the type when all we're
doing is making a TYPE_DECL for the purposes of
inlining. */
&& (!TYPE_NAME (type)
|| TYPE_NAME (type) != DECL_ABSTRACT_ORIGIN (x)))
{
DECL_ORIGINAL_TYPE (x) = type;
type = build_type_copy (type);
TYPE_STUB_DECL (type) = TYPE_STUB_DECL (DECL_ORIGINAL_TYPE (x));
TYPE_NAME (type) = x;
TREE_TYPE (x) = type;
}
if (type != error_mark_node
&& TYPE_NAME (type)
&& TYPE_IDENTIFIER (type))
set_identifier_type_value_with_scope (DECL_NAME (x), type,
current_binding_level);
}
/* Multiple external decls of the same identifier ought to match.
We get warnings about inline functions where they are defined.
We get warnings about other functions from push_overloaded_decl.
Avoid duplicate warnings where they are used. */
if (TREE_PUBLIC (x) && TREE_CODE (x) != FUNCTION_DECL)
{
tree decl;
decl = IDENTIFIER_NAMESPACE_VALUE (name);
if (decl && TREE_CODE (decl) == OVERLOAD)
decl = OVL_FUNCTION (decl);
if (decl && decl != error_mark_node
&& (DECL_EXTERNAL (decl) || TREE_PUBLIC (decl))
/* If different sort of thing, we already gave an error. */
&& TREE_CODE (decl) == TREE_CODE (x)
&& !same_type_p (TREE_TYPE (x), TREE_TYPE (decl)))
{
pedwarn ("type mismatch with previous external decl", x);
cp_pedwarn_at ("previous external decl of `%#D'", decl);
}
}
/* This name is new in its binding level.
Install the new declaration and return it. */
if (namespace_bindings_p ())
{
/* Install a global value. */
/* If the first global decl has external linkage,
warn if we later see static one. */
if (IDENTIFIER_GLOBAL_VALUE (name) == NULL_TREE && TREE_PUBLIC (x))
TREE_PUBLIC (name) = 1;
/* Bind the name for the entity. */
if (!(TREE_CODE (x) == TYPE_DECL && DECL_ARTIFICIAL (x)
&& t != NULL_TREE)
&& (TREE_CODE (x) == TYPE_DECL
|| TREE_CODE (x) == VAR_DECL
|| TREE_CODE (x) == NAMESPACE_DECL
|| TREE_CODE (x) == CONST_DECL
|| TREE_CODE (x) == TEMPLATE_DECL))
SET_IDENTIFIER_NAMESPACE_VALUE (name, x);
/* Don't forget if the function was used via an implicit decl. */
if (IDENTIFIER_IMPLICIT_DECL (name)
&& TREE_USED (IDENTIFIER_IMPLICIT_DECL (name)))
TREE_USED (x) = 1;
/* Don't forget if its address was taken in that way. */
if (IDENTIFIER_IMPLICIT_DECL (name)
&& TREE_ADDRESSABLE (IDENTIFIER_IMPLICIT_DECL (name)))
TREE_ADDRESSABLE (x) = 1;
/* Warn about mismatches against previous implicit decl. */
if (IDENTIFIER_IMPLICIT_DECL (name) != NULL_TREE
/* If this real decl matches the implicit, don't complain. */
&& ! (TREE_CODE (x) == FUNCTION_DECL
&& TREE_TYPE (TREE_TYPE (x)) == integer_type_node))
warning
("`%D' was previously implicitly declared to return `int'", x);
/* If new decl is `static' and an `extern' was seen previously,
warn about it. */
if (x != NULL_TREE && t != NULL_TREE && decls_match (x, t))
warn_extern_redeclared_static (x, t);
}
else
{
/* Here to install a non-global value. */
tree oldlocal = IDENTIFIER_VALUE (name);
tree oldglobal = IDENTIFIER_NAMESPACE_VALUE (name);
if (need_new_binding)
{
push_local_binding (name, x, 0);
/* Because push_local_binding will hook X on to the
current_binding_level's name list, we don't want to
do that again below. */
need_new_binding = 0;
}
/* If this is a TYPE_DECL, push it into the type value slot. */
if (TREE_CODE (x) == TYPE_DECL)
set_identifier_type_value_with_scope (name, TREE_TYPE (x),
current_binding_level);
/* Clear out any TYPE_DECL shadowed by a namespace so that
we won't think this is a type. The C struct hack doesn't
go through namespaces. */
if (TREE_CODE (x) == NAMESPACE_DECL)
set_identifier_type_value_with_scope (name, NULL_TREE,
current_binding_level);
if (oldlocal)
{
tree d = oldlocal;
while (oldlocal
&& TREE_CODE (oldlocal) == VAR_DECL
&& DECL_DEAD_FOR_LOCAL (oldlocal))
oldlocal = DECL_SHADOWED_FOR_VAR (oldlocal);
if (oldlocal == NULL_TREE)
oldlocal = IDENTIFIER_NAMESPACE_VALUE (DECL_NAME (d));
}
/* If this is an extern function declaration, see if we
have a global definition or declaration for the function. */
if (oldlocal == NULL_TREE
&& DECL_EXTERNAL (x)
&& oldglobal != NULL_TREE
&& TREE_CODE (x) == FUNCTION_DECL
&& TREE_CODE (oldglobal) == FUNCTION_DECL)
{
/* We have one. Their types must agree. */
if (decls_match (x, oldglobal))
/* OK */;
else
{
warning ("extern declaration of `%#D' doesn't match", x);
cp_warning_at ("global declaration `%#D'", oldglobal);
}
}
/* If we have a local external declaration,
and no file-scope declaration has yet been seen,
then if we later have a file-scope decl it must not be static. */
if (oldlocal == NULL_TREE
&& oldglobal == NULL_TREE
&& DECL_EXTERNAL (x)
&& TREE_PUBLIC (x))
TREE_PUBLIC (name) = 1;
/* Warn if shadowing an argument at the top level of the body. */
if (oldlocal != NULL_TREE && !DECL_EXTERNAL (x)
/* Inline decls shadow nothing. */
&& !DECL_FROM_INLINE (x)
&& TREE_CODE (oldlocal) == PARM_DECL)
{
bool err = false;
/* Don't complain if it's from an enclosing function. */
if (DECL_CONTEXT (oldlocal) == current_function_decl
&& TREE_CODE (x) != PARM_DECL)
{
/* Go to where the parms should be and see if we find
them there. */
struct binding_level *b = current_binding_level->level_chain;
/* Skip the ctor/dtor cleanup level. */
b = b->level_chain;
/* ARM $8.3 */
if (b->parm_flag == 1)
{
error ("declaration of `%#D' shadows a parameter",
name);
err = true;
}
}
if (warn_shadow && !err)
shadow_warning ("a parameter", name, oldlocal);
}
/* Maybe warn if shadowing something else. */
else if (warn_shadow && !DECL_EXTERNAL (x)
/* No shadow warnings for internally generated vars. */
&& ! DECL_ARTIFICIAL (x)
/* No shadow warnings for vars made for inlining. */
&& ! DECL_FROM_INLINE (x))
{
if (IDENTIFIER_CLASS_VALUE (name) != NULL_TREE
&& current_class_ptr
&& !TREE_STATIC (name))
warning ("declaration of `%s' shadows a member of `this'",
IDENTIFIER_POINTER (name));
else if (oldlocal != NULL_TREE
&& TREE_CODE (oldlocal) == VAR_DECL)
shadow_warning ("a previous local", name, oldlocal);
else if (oldglobal != NULL_TREE
&& TREE_CODE (oldglobal) == VAR_DECL)
/* XXX shadow warnings in outer-more namespaces */
shadow_warning ("a global declaration", name, oldglobal);
}
}
if (TREE_CODE (x) == FUNCTION_DECL)
check_default_args (x);
/* Keep count of variables in this level with incomplete type. */
if (TREE_CODE (x) == VAR_DECL
&& TREE_TYPE (x) != error_mark_node
&& ((!COMPLETE_TYPE_P (TREE_TYPE (x))
&& PROMOTES_TO_AGGR_TYPE (TREE_TYPE (x), ARRAY_TYPE))
/* RTTI TD entries are created while defining the type_info. */
|| (TYPE_LANG_SPECIFIC (TREE_TYPE (x))
&& TYPE_BEING_DEFINED (TREE_TYPE (x)))))
{
if (namespace_bindings_p ())
namespace_scope_incomplete
= tree_cons (NULL_TREE, x, namespace_scope_incomplete);
else
current_binding_level->incomplete
= tree_cons (NULL_TREE, x, current_binding_level->incomplete);
}
}
if (need_new_binding)
add_decl_to_level (x,
DECL_NAMESPACE_SCOPE_P (x)
? NAMESPACE_LEVEL (CP_DECL_CONTEXT (x))
: current_binding_level);
return x;
}
/* Same as pushdecl, but define X in binding-level LEVEL. We rely on the
caller to set DECL_CONTEXT properly. */
static tree
pushdecl_with_scope (x, level)
tree x;
struct binding_level *level;
{
register struct binding_level *b;
tree function_decl = current_function_decl;
current_function_decl = NULL_TREE;
if (level->parm_flag == 2)
{
b = class_binding_level;
class_binding_level = level;
pushdecl_class_level (x);
class_binding_level = b;
}
else
{
b = current_binding_level;
current_binding_level = level;
x = pushdecl (x);
current_binding_level = b;
}
current_function_decl = function_decl;
return x;
}
/* Like pushdecl, only it places X in the current namespace,
if appropriate. */
tree
pushdecl_namespace_level (x)
tree x;
{
register struct binding_level *b = current_binding_level;
register tree t;
t = pushdecl_with_scope (x, NAMESPACE_LEVEL (current_namespace));
/* Now, the type_shadowed stack may screw us. Munge it so it does
what we want. */
if (TREE_CODE (x) == TYPE_DECL)
{
tree name = DECL_NAME (x);
tree newval;
tree *ptr = (tree *)0;
for (; b != global_binding_level; b = b->level_chain)
{
tree shadowed = b->type_shadowed;
for (; shadowed; shadowed = TREE_CHAIN (shadowed))
if (TREE_PURPOSE (shadowed) == name)
{
ptr = &TREE_VALUE (shadowed);
/* Can't break out of the loop here because sometimes
a binding level will have duplicate bindings for
PT names. It's gross, but I haven't time to fix it. */
}
}
newval = TREE_TYPE (x);
if (ptr == (tree *)0)
{
/* @@ This shouldn't be needed. My test case "zstring.cc" trips
up here if this is changed to an assertion. --KR */
SET_IDENTIFIER_TYPE_VALUE (name, newval);
}
else
{
*ptr = newval;
}
}
return t;
}
/* Like pushdecl, only it places X in GLOBAL_BINDING_LEVEL,
if appropriate. */
tree
pushdecl_top_level (x)
tree x;
{
push_to_top_level ();
x = pushdecl_namespace_level (x);
pop_from_top_level ();
return x;
}
/* Make the declaration of X appear in CLASS scope. */
void
pushdecl_class_level (x)
tree x;
{
/* Don't use DECL_ASSEMBLER_NAME here! Everything that looks in class
scope looks for the pre-mangled name. */
register tree name;
if (TREE_CODE (x) == OVERLOAD)
x = OVL_CURRENT (x);
name = DECL_NAME (x);
if (name)
{
push_class_level_binding (name, x);
if (TREE_CODE (x) == TYPE_DECL)
set_identifier_type_value (name, TREE_TYPE (x));
}
else if (ANON_AGGR_TYPE_P (TREE_TYPE (x)))
{
tree f;
for (f = TYPE_FIELDS (TREE_TYPE (x));
f;
f = TREE_CHAIN (f))
pushdecl_class_level (f);
}
}
/* Enter DECL into the symbol table, if that's appropriate. Returns
DECL, or a modified version thereof. */
tree
maybe_push_decl (decl)
tree decl;
{
tree type = TREE_TYPE (decl);
/* Add this decl to the current binding level, but not if it comes
from another scope, e.g. a static member variable. TEM may equal
DECL or it may be a previous decl of the same name. */
if (decl == error_mark_node
|| (TREE_CODE (decl) != PARM_DECL
&& DECL_CONTEXT (decl) != NULL_TREE
/* Definitions of namespace members outside their namespace are
possible. */
&& TREE_CODE (DECL_CONTEXT (decl)) != NAMESPACE_DECL)
|| (TREE_CODE (decl) == TEMPLATE_DECL && !namespace_bindings_p ())
|| TREE_CODE (type) == UNKNOWN_TYPE
/* The declaration of a template specialization does not affect
the functions available for overload resolution, so we do not
call pushdecl. */
|| (TREE_CODE (decl) == FUNCTION_DECL
&& DECL_TEMPLATE_SPECIALIZATION (decl)))
return decl;
else
return pushdecl (decl);
}
/* Make the declaration(s) of X appear in CLASS scope
under the name NAME. */
void
push_class_level_binding (name, x)
tree name;
tree x;
{
tree binding;
/* The class_binding_level will be NULL if x is a template
parameter name in a member template. */
if (!class_binding_level)
return;
/* Make sure that this new member does not have the same name
as a template parameter. */
if (TYPE_BEING_DEFINED (current_class_type))
check_template_shadow (x);
/* If this declaration shadows a declaration from an enclosing
class, then we will need to restore IDENTIFIER_CLASS_VALUE when
we leave this class. Record the shadowed declaration here. */
binding = IDENTIFIER_BINDING (name);
if (binding
&& ((TREE_CODE (x) == OVERLOAD
&& BINDING_VALUE (binding)
&& is_overloaded_fn (BINDING_VALUE (binding)))
|| INHERITED_VALUE_BINDING_P (binding)))
{
tree shadow;
tree old_decl;
/* If the old binding was from a base class, and was for a tag
name, slide it over to make room for the new binding. The
old binding is still visible if explicitly qualified with a
class-key. */
if (INHERITED_VALUE_BINDING_P (binding)
&& BINDING_VALUE (binding)
&& TREE_CODE (BINDING_VALUE (binding)) == TYPE_DECL
&& DECL_ARTIFICIAL (BINDING_VALUE (binding))
&& !(TREE_CODE (x) == TYPE_DECL && DECL_ARTIFICIAL (x)))
{
old_decl = BINDING_TYPE (binding);
BINDING_TYPE (binding) = BINDING_VALUE (binding);
BINDING_VALUE (binding) = NULL_TREE;
INHERITED_VALUE_BINDING_P (binding) = 0;
}
else
old_decl = BINDING_VALUE (binding);
/* Find the previous binding of name on the class-shadowed
list, and update it. */
for (shadow = class_binding_level->class_shadowed;
shadow;
shadow = TREE_CHAIN (shadow))
if (TREE_PURPOSE (shadow) == name
&& TREE_TYPE (shadow) == old_decl)
{
BINDING_VALUE (binding) = x;
INHERITED_VALUE_BINDING_P (binding) = 0;
TREE_TYPE (shadow) = x;
IDENTIFIER_CLASS_VALUE (name) = x;
return;
}
}
/* If we didn't replace an existing binding, put the binding on the
stack of bindings for the identifier, and update the shadowed list. */
if (push_class_binding (name, x))
{
class_binding_level->class_shadowed
= tree_cons (name, NULL,
class_binding_level->class_shadowed);
/* Record the value we are binding NAME to so that we can know
what to pop later. */
TREE_TYPE (class_binding_level->class_shadowed) = x;
}
}
/* Insert another USING_DECL into the current binding level, returning
this declaration. If this is a redeclaration, do nothing, and
return NULL_TREE if this not in namespace scope (in namespace
scope, a using decl might extend any previous bindings). */
tree
push_using_decl (scope, name)
tree scope;
tree name;
{
tree decl;
my_friendly_assert (TREE_CODE (scope) == NAMESPACE_DECL, 383);
my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, 384);
for (decl = current_binding_level->usings; decl; decl = TREE_CHAIN (decl))
if (DECL_INITIAL (decl) == scope && DECL_NAME (decl) == name)
break;
if (decl)
return namespace_bindings_p () ? decl : NULL_TREE;
decl = build_lang_decl (USING_DECL, name, void_type_node);
DECL_INITIAL (decl) = scope;
TREE_CHAIN (decl) = current_binding_level->usings;
current_binding_level->usings = decl;
return decl;
}
/* Add namespace to using_directives. Return NULL_TREE if nothing was
changed (i.e. there was already a directive), or the fresh
TREE_LIST otherwise. */
tree
push_using_directive (used)
tree used;
{
tree ud = current_binding_level->using_directives;
tree iter, ancestor;
/* Check if we already have this. */
if (purpose_member (used, ud) != NULL_TREE)
return NULL_TREE;
/* Recursively add all namespaces used. */
for (iter = DECL_NAMESPACE_USING (used); iter; iter = TREE_CHAIN (iter))
push_using_directive (TREE_PURPOSE (iter));
ancestor = namespace_ancestor (current_decl_namespace (), used);
ud = current_binding_level->using_directives;
ud = tree_cons (used, ancestor, ud);
current_binding_level->using_directives = ud;
return ud;
}
/* DECL is a FUNCTION_DECL for a non-member function, which may have
other definitions already in place. We get around this by making
the value of the identifier point to a list of all the things that
want to be referenced by that name. It is then up to the users of
that name to decide what to do with that list.
DECL may also be a TEMPLATE_DECL, with a FUNCTION_DECL in its
DECL_TEMPLATE_RESULT. It is dealt with the same way.
FLAGS is a bitwise-or of the following values:
PUSH_LOCAL: Bind DECL in the current scope, rather than at
namespace scope.
PUSH_USING: DECL is being pushed as the result of a using
declaration.
The value returned may be a previous declaration if we guessed wrong
about what language DECL should belong to (C or C++). Otherwise,
it's always DECL (and never something that's not a _DECL). */
tree
push_overloaded_decl (decl, flags)
tree decl;
int flags;
{
tree name = DECL_NAME (decl);
tree old;
tree new_binding;
int doing_global = (namespace_bindings_p () || !(flags & PUSH_LOCAL));
if (doing_global)
old = namespace_binding (name, DECL_CONTEXT (decl));
else
old = lookup_name_current_level (name);
if (old)
{
if (TREE_CODE (old) == TYPE_DECL && DECL_ARTIFICIAL (old))
{
tree t = TREE_TYPE (old);
if (IS_AGGR_TYPE (t) && warn_shadow
&& (! DECL_IN_SYSTEM_HEADER (decl)
|| ! DECL_IN_SYSTEM_HEADER (old)))
warning ("`%#D' hides constructor for `%#T'", decl, t);
old = NULL_TREE;
}
else if (is_overloaded_fn (old))
{
tree tmp;
for (tmp = old; tmp; tmp = OVL_NEXT (tmp))
{
tree fn = OVL_CURRENT (tmp);
if (TREE_CODE (tmp) == OVERLOAD && OVL_USED (tmp)
&& !(flags & PUSH_USING)
&& compparms (TYPE_ARG_TYPES (TREE_TYPE (fn)),
TYPE_ARG_TYPES (TREE_TYPE (decl))))
error ("`%#D' conflicts with previous using declaration `%#D'",
decl, fn);
if (duplicate_decls (decl, fn))
return fn;
}
}
else if (old == error_mark_node)
/* Ignore the undefined symbol marker. */
old = NULL_TREE;
else
{
cp_error_at ("previous non-function declaration `%#D'", old);
error ("conflicts with function declaration `%#D'", decl);
return decl;
}
}
if (old || TREE_CODE (decl) == TEMPLATE_DECL)
{
if (old && TREE_CODE (old) != OVERLOAD)
new_binding = ovl_cons (decl, ovl_cons (old, NULL_TREE));
else
new_binding = ovl_cons (decl, old);
if (flags & PUSH_USING)
OVL_USED (new_binding) = 1;
}
else
/* NAME is not ambiguous. */
new_binding = decl;
if (doing_global)
set_namespace_binding (name, current_namespace, new_binding);
else
{
/* We only create an OVERLOAD if there was a previous binding at
this level, or if decl is a template. In the former case, we
need to remove the old binding and replace it with the new
binding. We must also run through the NAMES on the binding
level where the name was bound to update the chain. */
if (TREE_CODE (new_binding) == OVERLOAD && old)
{
tree *d;
for (d = &BINDING_LEVEL (IDENTIFIER_BINDING (name))->names;
*d;
d = &TREE_CHAIN (*d))
if (*d == old
|| (TREE_CODE (*d) == TREE_LIST
&& TREE_VALUE (*d) == old))
{
if (TREE_CODE (*d) == TREE_LIST)
/* Just replace the old binding with the new. */
TREE_VALUE (*d) = new_binding;
else
/* Build a TREE_LIST to wrap the OVERLOAD. */
*d = tree_cons (NULL_TREE, new_binding,
TREE_CHAIN (*d));
/* And update the CPLUS_BINDING node. */
BINDING_VALUE (IDENTIFIER_BINDING (name))
= new_binding;
return decl;
}
/* We should always find a previous binding in this case. */
my_friendly_abort (0);
}
/* Install the new binding. */
push_local_binding (name, new_binding, flags);
}
return decl;
}
/* Generate an implicit declaration for identifier FUNCTIONID
as a function of type int (). Print a warning if appropriate. */
tree
implicitly_declare (functionid)
tree functionid;
{
register tree decl;
/* We used to reuse an old implicit decl here,
but this loses with inline functions because it can clobber
the saved decl chains. */
decl = build_lang_decl (FUNCTION_DECL, functionid, default_function_type);
DECL_EXTERNAL (decl) = 1;
TREE_PUBLIC (decl) = 1;
/* ISO standard says implicit declarations are in the innermost block.
So we record the decl in the standard fashion. */
pushdecl (decl);
rest_of_decl_compilation (decl, NULL, 0, 0);
if (warn_implicit
/* Only one warning per identifier. */
&& IDENTIFIER_IMPLICIT_DECL (functionid) == NULL_TREE)
{
pedwarn ("implicit declaration of function `%#D'", decl);
}
SET_IDENTIFIER_IMPLICIT_DECL (functionid, decl);
return decl;
}
/* Return zero if the declaration NEWDECL is valid
when the declaration OLDDECL (assumed to be for the same name)
has already been seen.
Otherwise return an error message format string with a %s
where the identifier should go. */
static const char *
redeclaration_error_message (newdecl, olddecl)
tree newdecl, olddecl;
{
if (TREE_CODE (newdecl) == TYPE_DECL)
{
/* Because C++ can put things into name space for free,
constructs like "typedef struct foo { ... } foo"
would look like an erroneous redeclaration. */
if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
return 0;
else
return "redefinition of `%#D'";
}
else if (TREE_CODE (newdecl) == FUNCTION_DECL)
{
/* If this is a pure function, its olddecl will actually be
the original initialization to `0' (which we force to call
abort()). Don't complain about redefinition in this case. */
if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl))
return 0;
/* If both functions come from different namespaces, this is not
a redeclaration - this is a conflict with a used function. */
if (DECL_NAMESPACE_SCOPE_P (olddecl)
&& DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl))
return "`%D' conflicts with used function";
/* We'll complain about linkage mismatches in
warn_extern_redeclared_static. */
/* Defining the same name twice is no good. */
if (DECL_INITIAL (olddecl) != NULL_TREE
&& DECL_INITIAL (newdecl) != NULL_TREE)
{
if (DECL_NAME (olddecl) == NULL_TREE)
return "`%#D' not declared in class";
else
return "redefinition of `%#D'";
}
return 0;
}
else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
{
if ((TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
&& (DECL_TEMPLATE_RESULT (newdecl)
!= DECL_TEMPLATE_RESULT (olddecl))
&& DECL_INITIAL (DECL_TEMPLATE_RESULT (newdecl))
&& DECL_INITIAL (DECL_TEMPLATE_RESULT (olddecl)))
|| (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL
&& COMPLETE_TYPE_P (TREE_TYPE (newdecl))
&& COMPLETE_TYPE_P (TREE_TYPE (olddecl))))
return "redefinition of `%#D'";
return 0;
}
else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
{
/* Objects declared at top level: */
/* If at least one is a reference, it's ok. */
if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
return 0;
/* Reject two definitions. */
return "redefinition of `%#D'";
}
else
{
/* Objects declared with block scope: */
/* Reject two definitions, and reject a definition
together with an external reference. */
if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
return "redeclaration of `%#D'";
return 0;
}
}
/* Create a new label, named ID. */
static tree
make_label_decl (id, local_p)
tree id;
int local_p;
{
tree decl;
decl = build_decl (LABEL_DECL, id, void_type_node);
if (expanding_p)
/* Make sure every label has an rtx. */
label_rtx (decl);
DECL_CONTEXT (decl) = current_function_decl;
DECL_MODE (decl) = VOIDmode;
C_DECLARED_LABEL_FLAG (decl) = local_p;
/* Say where one reference is to the label, for the sake of the
error if it is not defined. */
DECL_SOURCE_LINE (decl) = lineno;
DECL_SOURCE_FILE (decl) = input_filename;
/* Record the fact that this identifier is bound to this label. */
SET_IDENTIFIER_LABEL_VALUE (id, decl);
return decl;
}
/* Record this label on the list of used labels so that we can check
at the end of the function to see whether or not the label was
actually defined, and so we can check when the label is defined whether
this use is valid. */
static void
use_label (decl)
tree decl;
{
if (named_label_uses == NULL
|| named_label_uses->names_in_scope != current_binding_level->names
|| named_label_uses->label_decl != decl)
{
struct named_label_use_list *new_ent;
new_ent = ((struct named_label_use_list *)
ggc_alloc (sizeof (struct named_label_use_list)));
new_ent->label_decl = decl;
new_ent->names_in_scope = current_binding_level->names;
new_ent->binding_level = current_binding_level;
new_ent->lineno_o_goto = lineno;
new_ent->filename_o_goto = input_filename;
new_ent->next = named_label_uses;
named_label_uses = new_ent;
}
}
/* Look for a label named ID in the current function. If one cannot
be found, create one. (We keep track of used, but undefined,
labels, and complain about them at the end of a function.) */
tree
lookup_label (id)
tree id;
{
tree decl;
struct named_label_list *ent;
/* You can't use labels at global scope. */
if (current_function_decl == NULL_TREE)
{
error ("label `%s' referenced outside of any function",
IDENTIFIER_POINTER (id));
return NULL_TREE;
}
/* See if we've already got this label. */
decl = IDENTIFIER_LABEL_VALUE (id);
if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
return decl;
/* Record this label on the list of labels used in this function.
We do this before calling make_label_decl so that we get the
IDENTIFIER_LABEL_VALUE before the new label is declared. */
ent = ((struct named_label_list *)
ggc_alloc_cleared (sizeof (struct named_label_list)));
ent->old_value = IDENTIFIER_LABEL_VALUE (id);
ent->next = named_labels;
named_labels = ent;
/* We need a new label. */
decl = make_label_decl (id, /*local_p=*/0);
/* Now fill in the information we didn't have before. */
ent->label_decl = decl;
return decl;
}
/* Declare a local label named ID. */
tree
declare_local_label (id)
tree id;
{
tree decl;
/* Add a new entry to the SHADOWED_LABELS list so that when we leave
this scope we can restore the old value of
IDENTIFIER_TYPE_VALUE. */
current_binding_level->shadowed_labels
= tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
current_binding_level->shadowed_labels);
/* Look for the label. */
decl = make_label_decl (id, /*local_p=*/1);
/* Now fill in the information we didn't have before. */
TREE_VALUE (current_binding_level->shadowed_labels) = decl;
return decl;
}
/* Returns nonzero if it is ill-formed to jump past the declaration of
DECL. Returns 2 if it's also a real problem. */
static int
decl_jump_unsafe (decl)
tree decl;
{
if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl))
return 0;
if (DECL_INITIAL (decl) == NULL_TREE
&& pod_type_p (TREE_TYPE (decl)))
return 0;
/* This is really only important if we're crossing an initialization.
The POD stuff is just pedantry; why should it matter if the class
contains a field of pointer to member type? */
if (DECL_INITIAL (decl)
|| (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))))
return 2;
return 1;
}
/* Check that a single previously seen jump to a newly defined label
is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
the jump context; NAMES are the names in scope in LEVEL at the jump
context; FILE and LINE are the source position of the jump or 0. */
static void
check_previous_goto_1 (decl, level, names, file, line)
tree decl;
struct binding_level *level;
tree names;
const char *file;
int line;
{
int identified = 0;
int saw_eh = 0;
struct binding_level *b = current_binding_level;
for (; b; b = b->level_chain)
{
tree new_decls = b->names;
tree old_decls = (b == level ? names : NULL_TREE);
for (; new_decls != old_decls;
new_decls = TREE_CHAIN (new_decls))
{
int problem = decl_jump_unsafe (new_decls);
if (! problem)
continue;
if (! identified)
{
if (decl)
pedwarn ("jump to label `%D'", decl);
else
pedwarn ("jump to case label");
if (file)
pedwarn_with_file_and_line (file, line, " from here");
identified = 1;
}
if (problem > 1)
cp_error_at (" crosses initialization of `%#D'",
new_decls);
else
cp_pedwarn_at (" enters scope of non-POD `%#D'",
new_decls);
}
if (b == level)
break;
if ((b->is_try_scope || b->is_catch_scope) && ! saw_eh)
{
if (! identified)
{
if (decl)
pedwarn ("jump to label `%D'", decl);
else
pedwarn ("jump to case label");
if (file)
pedwarn_with_file_and_line (file, line, " from here");
identified = 1;
}
if (b->is_try_scope)
error (" enters try block");
else
error (" enters catch block");
saw_eh = 1;
}
}
}
static void
check_previous_goto (use)
struct named_label_use_list *use;
{
check_previous_goto_1 (use->label_decl, use->binding_level,
use->names_in_scope, use->filename_o_goto,
use->lineno_o_goto);
}
static void
check_switch_goto (level)
struct binding_level *level;
{
check_previous_goto_1 (NULL_TREE, level, level->names, NULL, 0);
}
/* Check that any previously seen jumps to a newly defined label DECL
are OK. Called by define_label. */
static void
check_previous_gotos (decl)
tree decl;
{
struct named_label_use_list **usep;
if (! TREE_USED (decl))
return;
for (usep = &named_label_uses; *usep; )
{
struct named_label_use_list *use = *usep;
if (use->label_decl == decl)
{
check_previous_goto (use);
*usep = use->next;
}
else
usep = &(use->next);
}
}
/* Check that a new jump to a label DECL is OK. Called by
finish_goto_stmt. */
void
check_goto (decl)
tree decl;
{
int identified = 0;
tree bad;
struct named_label_list *lab;
/* We can't know where a computed goto is jumping. So we assume
that it's OK. */
if (! DECL_P (decl))
return;
/* If the label hasn't been defined yet, defer checking. */
if (! DECL_INITIAL (decl))
{
use_label (decl);
return;
}
for (lab = named_labels; lab; lab = lab->next)
if (decl == lab->label_decl)
break;
/* If the label is not on named_labels it's a gcc local label, so
it must be in an outer scope, so jumping to it is always OK. */
if (lab == 0)
return;
if ((lab->in_try_scope || lab->in_catch_scope || lab->bad_decls)
&& !identified)
{
cp_pedwarn_at ("jump to label `%D'", decl);
pedwarn (" from here");
identified = 1;
}
for (bad = lab->bad_decls; bad; bad = TREE_CHAIN (bad))
{
tree b = TREE_VALUE (bad);
int u = decl_jump_unsafe (b);
if (u > 1 && DECL_ARTIFICIAL (b))
/* Can't skip init of __exception_info. */
cp_error_at (" enters catch block", b);
else if (u > 1)
cp_error_at (" skips initialization of `%#D'", b);
else
cp_pedwarn_at (" enters scope of non-POD `%#D'", b);
}
if (lab->in_try_scope)
error (" enters try block");
else if (lab->in_catch_scope)
error (" enters catch block");
}
/* Define a label, specifying the location in the source file.
Return the LABEL_DECL node for the label, if the definition is valid.
Otherwise return 0. */
tree
define_label (filename, line, name)
const char *filename;
int line;
tree name;
{
tree decl = lookup_label (name);
struct named_label_list *ent;
register struct binding_level *p;
for (ent = named_labels; ent; ent = ent->next)
if (ent->label_decl == decl)
break;
/* After labels, make any new cleanups in the function go into their
own new (temporary) binding contour. */
for (p = current_binding_level; !(p->parm_flag); p = p->level_chain)
p->more_cleanups_ok = 0;
if (name == get_identifier ("wchar_t"))
pedwarn ("label named wchar_t");
if (DECL_INITIAL (decl) != NULL_TREE)
{
error ("duplicate label `%D'", decl);
return 0;
}
else
{
/* Mark label as having been defined. */
DECL_INITIAL (decl) = error_mark_node;
/* Say where in the source. */
DECL_SOURCE_FILE (decl) = filename;
DECL_SOURCE_LINE (decl) = line;
if (ent)
{
ent->names_in_scope = current_binding_level->names;
ent->binding_level = current_binding_level;
}
check_previous_gotos (decl);
return decl;
}
}
struct cp_switch
{
struct binding_level *level;
struct cp_switch *next;
/* The SWITCH_STMT being built. */
tree switch_stmt;
/* A splay-tree mapping the low element of a case range to the high
element, or NULL_TREE if there is no high element. Used to
determine whether or not a new case label duplicates an old case
label. We need a tree, rather than simply a hash table, because
of the GNU case range extension. */
splay_tree cases;
};
/* A stack of the currently active switch statements. The innermost
switch statement is on the top of the stack. There is no need to
mark the stack for garbage collection because it is only active
during the processing of the body of a function, and we never
collect at that point. */
static struct cp_switch *switch_stack;
/* Called right after a switch-statement condition is parsed.
SWITCH_STMT is the switch statement being parsed. */
void
push_switch (switch_stmt)
tree switch_stmt;
{
struct cp_switch *p
= (struct cp_switch *) xmalloc (sizeof (struct cp_switch));
p->level = current_binding_level;
p->next = switch_stack;
p->switch_stmt = switch_stmt;
p->cases = splay_tree_new (case_compare, NULL, NULL);
switch_stack = p;
}
void
pop_switch ()
{
struct cp_switch *cs;
cs = switch_stack;
splay_tree_delete (cs->cases);
switch_stack = switch_stack->next;
free (cs);
}
/* Note that we've seen a definition of a case label, and complain if this
is a bad place for one. */
tree
finish_case_label (low_value, high_value)
tree low_value;
tree high_value;
{
tree cond, r;
register struct binding_level *p;
if (! switch_stack)
{
if (high_value)
error ("case label not within a switch statement");
else if (low_value)
error ("case label `%E' not within a switch statement",
low_value);
else
error ("`default' label not within a switch statement");
return NULL_TREE;
}
if (processing_template_decl)
{
tree label;
/* For templates, just add the case label; we'll do semantic
analysis at instantiation-time. */
label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
return add_stmt (build_case_label (low_value, high_value, label));
}
/* Find the condition on which this switch statement depends. */
cond = SWITCH_COND (switch_stack->switch_stmt);
if (cond && TREE_CODE (cond) == TREE_LIST)
cond = TREE_VALUE (cond);
r = c_add_case_label (switch_stack->cases, cond, low_value, high_value);
if (r == error_mark_node)
r = NULL_TREE;
check_switch_goto (switch_stack->level);
/* After labels, make any new cleanups in the function go into their
own new (temporary) binding contour. */
for (p = current_binding_level; !(p->parm_flag); p = p->level_chain)
p->more_cleanups_ok = 0;
return r;
}
/* Return the list of declarations of the current level.
Note that this list is in reverse order unless/until
you nreverse it; and when you do nreverse it, you must
store the result back using `storedecls' or you will lose. */
tree
getdecls ()
{
return current_binding_level->names;
}
/* Return the list of type-tags (for structs, etc) of the current level. */
tree
gettags ()
{
return current_binding_level->tags;
}
/* Store the list of declarations of the current level.
This is done for the parameter declarations of a function being defined,
after they are modified in the light of any missing parameters. */
static void
storedecls (decls)
tree decls;
{
current_binding_level->names = decls;
}
/* Similarly, store the list of tags of the current level. */
void
storetags (tags)
tree tags;
{
current_binding_level->tags = tags;
}
/* Given NAME, an IDENTIFIER_NODE,
return the structure (or union or enum) definition for that name.
Searches binding levels from BINDING_LEVEL up to the global level.
If THISLEVEL_ONLY is nonzero, searches only the specified context
(but skips any tag-transparent contexts to find one that is
meaningful for tags).
FORM says which kind of type the caller wants;
it is RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE.
If the wrong kind of type is found, and it's not a template, an error is
reported. */
static tree
lookup_tag (form, name, binding_level, thislevel_only)
enum tree_code form;
tree name;
struct binding_level *binding_level;
int thislevel_only;
{
register struct binding_level *level;
/* Non-zero if, we should look past a template parameter level, even
if THISLEVEL_ONLY. */
int allow_template_parms_p = 1;
for (level = binding_level; level; level = level->level_chain)
{
register tree tail;
if (ANON_AGGRNAME_P (name))
for (tail = level->tags; tail; tail = TREE_CHAIN (tail))
{
/* There's no need for error checking here, because
anon names are unique throughout the compilation. */
if (TYPE_IDENTIFIER (TREE_VALUE (tail)) == name)
return TREE_VALUE (tail);
}
else if (level->namespace_p)
/* Do namespace lookup. */
for (tail = current_namespace; 1; tail = CP_DECL_CONTEXT (tail))
{
tree old = binding_for_name (name, tail);
/* If we just skipped past a template parameter level,
even though THISLEVEL_ONLY, and we find a template
class declaration, then we use the _TYPE node for the
template. See the example below. */
if (thislevel_only && !allow_template_parms_p
&& old && BINDING_VALUE (old)
&& DECL_CLASS_TEMPLATE_P (BINDING_VALUE (old)))
old = TREE_TYPE (BINDING_VALUE (old));
else
old = BINDING_TYPE (old);
/* If it has an original type, it is a typedef, and we
should not return it. */
if (old && DECL_ORIGINAL_TYPE (TYPE_NAME (old)))
old = NULL_TREE;
if (old && TREE_CODE (old) != form
&& !(form != ENUMERAL_TYPE && TREE_CODE (old) == TEMPLATE_DECL))
{
error ("`%#D' redeclared as %C", old, form);
return NULL_TREE;
}
if (old)
return old;
if (thislevel_only || tail == global_namespace)
return NULL_TREE;
}
else
for (tail = level->tags; tail; tail = TREE_CHAIN (tail))
{
if (TREE_PURPOSE (tail) == name)
{
enum tree_code code = TREE_CODE (TREE_VALUE (tail));
/* Should tighten this up; it'll probably permit
UNION_TYPE and a struct template, for example. */
if (code != form
&& !(form != ENUMERAL_TYPE && code == TEMPLATE_DECL))
{
/* Definition isn't the kind we were looking for. */
error ("`%#D' redeclared as %C", TREE_VALUE (tail),
form);
return NULL_TREE;
}
return TREE_VALUE (tail);
}
}
if (thislevel_only && ! level->tag_transparent)
{
if (level->template_parms_p && allow_template_parms_p)
{
/* We must deal with cases like this:
template <class T> struct S;
template <class T> struct S {};
When looking up `S', for the second declaration, we
would like to find the first declaration. But, we
are in the pseudo-global level created for the
template parameters, rather than the (surrounding)
namespace level. Thus, we keep going one more level,
even though THISLEVEL_ONLY is non-zero. */
allow_template_parms_p = 0;
continue;
}
else
return NULL_TREE;
}
}
return NULL_TREE;
}
#if 0
void
set_current_level_tags_transparency (tags_transparent)
int tags_transparent;
{
current_binding_level->tag_transparent = tags_transparent;
}
#endif
/* Given a type, find the tag that was defined for it and return the tag name.
Otherwise return 0. However, the value can never be 0
in the cases in which this is used.
C++: If NAME is non-zero, this is the new name to install. This is
done when replacing anonymous tags with real tag names. */
static tree
lookup_tag_reverse (type, name)
tree type;
tree name;
{
register struct binding_level *level;
for (level = current_binding_level; level; level = level->level_chain)
{
register tree tail;
for (tail = level->tags; tail; tail = TREE_CHAIN (tail))
{
if (TREE_VALUE (tail) == type)
{
if (name)
TREE_PURPOSE (tail) = name;
return TREE_PURPOSE (tail);
}
}
}
return NULL_TREE;
}
/* Look up NAME in the NAMESPACE. */
tree
lookup_namespace_name (namespace, name)
tree namespace, name;
{
tree val;
tree template_id = NULL_TREE;
my_friendly_assert (TREE_CODE (namespace) == NAMESPACE_DECL, 370);
if (TREE_CODE (name) == NAMESPACE_DECL)
/* This happens for A::B<int> when B is a namespace. */
return name;
else if (TREE_CODE (name) == TEMPLATE_DECL)
{
/* This happens for A::B where B is a template, and there are no
template arguments. */
error ("invalid use of `%D'", name);
return error_mark_node;
}
namespace = ORIGINAL_NAMESPACE (namespace);
if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
{
template_id = name;
name = TREE_OPERAND (name, 0);
if (TREE_CODE (name) == OVERLOAD)
name = DECL_NAME (OVL_CURRENT (name));
else if (DECL_P (name))
name = DECL_NAME (name);
}
my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, 373);
val = make_node (CPLUS_BINDING);
if (!qualified_lookup_using_namespace (name, namespace, val, 0))
return error_mark_node;
if (BINDING_VALUE (val))
{
val = BINDING_VALUE (val);
if (template_id)
{
if (DECL_CLASS_TEMPLATE_P (val))
val = lookup_template_class (val,
TREE_OPERAND (template_id, 1),
/*in_decl=*/NULL_TREE,
/*context=*/NULL_TREE,
/*entering_scope=*/0,
/*complain=*/1);
else if (DECL_FUNCTION_TEMPLATE_P (val)
|| TREE_CODE (val) == OVERLOAD)
val = lookup_template_function (val,
TREE_OPERAND (template_id, 1));
else
{
error ("`%D::%D' is not a template",
namespace, name);
return error_mark_node;
}
}
/* If we have a single function from a using decl, pull it out. */
if (TREE_CODE (val) == OVERLOAD && ! really_overloaded_fn (val))
val = OVL_FUNCTION (val);
return val;
}
error ("`%D' undeclared in namespace `%D'", name, namespace);
return error_mark_node;
}
/* Hash a TYPENAME_TYPE. K is really of type `tree'. */
static unsigned long
typename_hash (k)
hash_table_key k;
{
unsigned long hash;
tree t;
t = (tree) k;
hash = (((unsigned long) TYPE_CONTEXT (t))
^ ((unsigned long) DECL_NAME (TYPE_NAME (t))));
return hash;
}
/* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
static bool
typename_compare (k1, k2)
hash_table_key k1;
hash_table_key k2;
{
tree t1;
tree t2;
tree d1;
tree d2;
t1 = (tree) k1;
t2 = (tree) k2;
d1 = TYPE_NAME (t1);
d2 = TYPE_NAME (t2);
return (DECL_NAME (d1) == DECL_NAME (d2)
&& same_type_p (TYPE_CONTEXT (t1), TYPE_CONTEXT (t2))
&& ((TREE_TYPE (t1) != NULL_TREE)
== (TREE_TYPE (t2) != NULL_TREE))
&& same_type_p (TREE_TYPE (t1), TREE_TYPE (t2))
&& TYPENAME_TYPE_FULLNAME (t1) == TYPENAME_TYPE_FULLNAME (t2));
}
/* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
the type of `T', NAME is the IDENTIFIER_NODE for `t'. If BASE_TYPE
is non-NULL, this type is being created by the implicit typename
extension, and BASE_TYPE is a type named `t' in some base class of
`T' which depends on template parameters.
Returns the new TYPENAME_TYPE. */
tree
build_typename_type (context, name, fullname, base_type)
tree context;
tree name;
tree fullname;
tree base_type;
{
tree t;
tree d;
struct hash_entry *e;
static struct hash_table ht;
if (!ht.table)
{
static struct hash_table *h = &ht;
hash_table_init (&ht, &hash_newfunc, &typename_hash, &typename_compare);
ggc_add_tree_hash_table_root (&h, 1);
}
/* Build the TYPENAME_TYPE. */
t = make_aggr_type (TYPENAME_TYPE);
TYPE_CONTEXT (t) = FROB_CONTEXT (context);
TYPENAME_TYPE_FULLNAME (t) = fullname;
TREE_TYPE (t) = base_type;
/* Build the corresponding TYPE_DECL. */
d = build_decl (TYPE_DECL, name, t);
TYPE_NAME (TREE_TYPE (d)) = d;
TYPE_STUB_DECL (TREE_TYPE (d)) = d;
DECL_CONTEXT (d) = FROB_CONTEXT (context);
DECL_ARTIFICIAL (d) = 1;
/* See if we already have this type. */
e = hash_lookup (&ht, t, /*create=*/false, /*copy=*/0);
if (e)
t = (tree) e->key;
else
/* Insert the type into the table. */
hash_lookup (&ht, t, /*create=*/true, /*copy=*/0);
return t;
}
/* Resolve `typename CONTEXT::NAME'. Returns an appropriate type,
unless an error occurs, in which case error_mark_node is returned.
If COMPLAIN zero, don't complain about any errors that occur. */
tree
make_typename_type (context, name, complain)
tree context, name;
int complain;
{
tree fullname;
if (TYPE_P (name))
{
if (!(TYPE_LANG_SPECIFIC (name)
&& (CLASSTYPE_IS_TEMPLATE (name)
|| CLASSTYPE_USE_TEMPLATE (name))))
name = TYPE_IDENTIFIER (name);
else
/* Create a TEMPLATE_ID_EXPR for the type. */
name = build_nt (TEMPLATE_ID_EXPR,
CLASSTYPE_TI_TEMPLATE (name),
CLASSTYPE_TI_ARGS (name));
}
else if (TREE_CODE (name) == TYPE_DECL)
name = DECL_NAME (name);
fullname = name;
if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
{
name = TREE_OPERAND (name, 0);
if (TREE_CODE (name) == TEMPLATE_DECL)
name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
}
if (TREE_CODE (name) == TEMPLATE_DECL)
{
error ("`%D' used without template parameters", name);
return error_mark_node;
}
if (TREE_CODE (name) != IDENTIFIER_NODE)
my_friendly_abort (2000);
if (TREE_CODE (context) == NAMESPACE_DECL)
{
/* We can get here from typename_sub0 in the explicit_template_type
expansion. Just fail. */
if (complain)
error ("no class template named `%#T' in `%#T'",
name, context);
return error_mark_node;
}
if (! uses_template_parms (context)
|| currently_open_class (context))
{
if (TREE_CODE (fullname) == TEMPLATE_ID_EXPR)
{
tree tmpl = NULL_TREE;
if (IS_AGGR_TYPE (context))
tmpl = lookup_field (context, name, 0, 0);
if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
{
if (complain)
error ("no class template named `%#T' in `%#T'",
name, context);
return error_mark_node;
}
return lookup_template_class (tmpl,
TREE_OPERAND (fullname, 1),
NULL_TREE, context,
/*entering_scope=*/0,
/*complain=*/1);
}
else
{
tree t;
if (!IS_AGGR_TYPE (context))
{
if (complain)
error ("no type named `%#T' in `%#T'", name, context);
return error_mark_node;
}
t = lookup_field (context, name, 0, 1);
if (t)
return TREE_TYPE (t);
}
}
/* If the CONTEXT is not a template type, then either the field is
there now or its never going to be. */
if (!uses_template_parms (context))
{
if (complain)
error ("no type named `%#T' in `%#T'", name, context);
return error_mark_node;
}
return build_typename_type (context, name, fullname, NULL_TREE);
}
/* Resolve `CONTEXT::template NAME'. Returns an appropriate type,
unless an error occurs, in which case error_mark_node is returned.
If COMPLAIN zero, don't complain about any errors that occur. */
tree
make_unbound_class_template (context, name, complain)
tree context, name;
int complain;
{
tree t;
tree d;
if (TYPE_P (name))
name = TYPE_IDENTIFIER (name);
else if (DECL_P (name))
name = DECL_NAME (name);
if (TREE_CODE (name) != IDENTIFIER_NODE)
my_friendly_abort (20010902);
if (!uses_template_parms (context)
|| currently_open_class (context))
{
tree tmpl = NULL_TREE;
if (IS_AGGR_TYPE (context))
tmpl = lookup_field (context, name, 0, 0);
if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
{
if (complain)
error ("no class template named `%#T' in `%#T'", name, context);
return error_mark_node;
}
if (!enforce_access (context, tmpl))
return error_mark_node;
return tmpl;
}
/* Build the UNBOUND_CLASS_TEMPLATE. */
t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
TYPE_CONTEXT (t) = FROB_CONTEXT (context);
TREE_TYPE (t) = NULL_TREE;
/* Build the corresponding TEMPLATE_DECL. */
d = build_decl (TEMPLATE_DECL, name, t);
TYPE_NAME (TREE_TYPE (d)) = d;
TYPE_STUB_DECL (TREE_TYPE (d)) = d;
DECL_CONTEXT (d) = FROB_CONTEXT (context);
DECL_ARTIFICIAL (d) = 1;
return t;
}
/* Select the right _DECL from multiple choices. */
static tree
select_decl (binding, flags)
tree binding;
int flags;
{
tree val;
val = BINDING_VALUE (binding);
/* When we implicitly declare some builtin entity, we mark it
DECL_ANTICIPATED, so that we know to ignore it until it is
really declared. */
if (val && DECL_P (val)
&& DECL_LANG_SPECIFIC (val)
&& DECL_ANTICIPATED (val))
return NULL_TREE;
if (LOOKUP_NAMESPACES_ONLY (flags))
{
/* We are not interested in types. */
if (val && TREE_CODE (val) == NAMESPACE_DECL)
return val;
return NULL_TREE;
}
/* If we could have a type and
we have nothing or we need a type and have none. */
if (BINDING_TYPE (binding)
&& (!val || ((flags & LOOKUP_PREFER_TYPES)
&& TREE_CODE (val) != TYPE_DECL)))
val = TYPE_STUB_DECL (BINDING_TYPE (binding));
/* Don't return non-types if we really prefer types. */
else if (val && LOOKUP_TYPES_ONLY (flags) && TREE_CODE (val) != TYPE_DECL
&& (TREE_CODE (val) != TEMPLATE_DECL
|| !DECL_CLASS_TEMPLATE_P (val)))
val = NULL_TREE;
return val;
}
/* Unscoped lookup of a global: iterate over current namespaces,
considering using-directives. If SPACESP is non-NULL, store a list
of the namespaces we've considered in it. */
tree
unqualified_namespace_lookup (name, flags, spacesp)
tree name;
int flags;
tree *spacesp;
{
tree b = make_node (CPLUS_BINDING);
tree initial = current_decl_namespace ();
tree scope = initial;
tree siter;
struct binding_level *level;
tree val = NULL_TREE;
if (spacesp)
*spacesp = NULL_TREE;
for (; !val; scope = CP_DECL_CONTEXT (scope))
{
if (spacesp)
*spacesp = tree_cons (scope, NULL_TREE, *spacesp);
val = binding_for_name (name, scope);
/* Initialize binding for this context. */
BINDING_VALUE (b) = BINDING_VALUE (val);
BINDING_TYPE (b) = BINDING_TYPE (val);
/* Add all _DECLs seen through local using-directives. */
for (level = current_binding_level;
!level->namespace_p;
level = level->level_chain)
if (!lookup_using_namespace (name, b, level->using_directives,
scope, flags, spacesp))
/* Give up because of error. */
return error_mark_node;
/* Add all _DECLs seen through global using-directives. */
/* XXX local and global using lists should work equally. */
siter = initial;
while (1)
{
if (!lookup_using_namespace (name, b, DECL_NAMESPACE_USING (siter),
scope, flags, spacesp))
/* Give up because of error. */
return error_mark_node;
if (siter == scope) break;
siter = CP_DECL_CONTEXT (siter);
}
val = select_decl (b, flags);
if (scope == global_namespace)
break;
}
return val;
}
/* Combine prefer_type and namespaces_only into flags. */
static int
lookup_flags (prefer_type, namespaces_only)
int prefer_type, namespaces_only;
{
if (namespaces_only)
return LOOKUP_PREFER_NAMESPACES;
if (prefer_type > 1)
return LOOKUP_PREFER_TYPES;
if (prefer_type > 0)
return LOOKUP_PREFER_BOTH;
return 0;
}
/* Given a lookup that returned VAL, use FLAGS to decide if we want to
ignore it or not. Subroutine of lookup_name_real. */
static tree
qualify_lookup (val, flags)
tree val;
int flags;
{
if (val == NULL_TREE)
return val;
if ((flags & LOOKUP_PREFER_NAMESPACES) && TREE_CODE (val) == NAMESPACE_DECL)
return val;
if ((flags & LOOKUP_PREFER_TYPES)
&& (TREE_CODE (val) == TYPE_DECL
|| ((flags & LOOKUP_TEMPLATES_EXPECTED)
&& DECL_CLASS_TEMPLATE_P (val))))
return val;
if (flags & (LOOKUP_PREFER_NAMESPACES | LOOKUP_PREFER_TYPES))
return NULL_TREE;
return val;
}
/* Any other BINDING overrides an implicit TYPENAME. Warn about
that. */
static void
warn_about_implicit_typename_lookup (typename, binding)
tree typename;
tree binding;
{
tree subtype = TREE_TYPE (TREE_TYPE (typename));
tree name = DECL_NAME (typename);
if (! (TREE_CODE (binding) == TEMPLATE_DECL
&& CLASSTYPE_TEMPLATE_INFO (subtype)
&& CLASSTYPE_TI_TEMPLATE (subtype) == binding)
&& ! (TREE_CODE (binding) == TYPE_DECL
&& same_type_p (TREE_TYPE (binding), subtype)))
{
warning ("lookup of `%D' finds `%#D'",
name, binding);
warning (" instead of `%D' from dependent base class",
typename);
warning (" (use `typename %T::%D' if that's what you meant)",
constructor_name (current_class_type), name);
}
}
/* Look up NAME in the current binding level and its superiors in the
namespace of variables, functions and typedefs. Return a ..._DECL
node of some kind representing its definition if there is only one
such declaration, or return a TREE_LIST with all the overloaded
definitions if there are many, or return 0 if it is undefined.
If PREFER_TYPE is > 0, we prefer TYPE_DECLs or namespaces.
If PREFER_TYPE is > 1, we reject non-type decls (e.g. namespaces).
If PREFER_TYPE is -2, we're being called from yylex(). (UGLY)
Otherwise we prefer non-TYPE_DECLs.
If NONCLASS is non-zero, we don't look for the NAME in class scope,
using IDENTIFIER_CLASS_VALUE. */
static tree
lookup_name_real (name, prefer_type, nonclass, namespaces_only)
tree name;
int prefer_type, nonclass, namespaces_only;
{
tree t;
tree val = NULL_TREE;
int yylex = 0;
tree from_obj = NULL_TREE;
int flags;
int val_is_implicit_typename = 0;
/* Hack: copy flag set by parser, if set. */
if (only_namespace_names)
namespaces_only = 1;
if (prefer_type == -2)
{
extern int looking_for_typename;
tree type = NULL_TREE;
yylex = 1;
prefer_type = looking_for_typename;
flags = lookup_flags (prefer_type, namespaces_only);
/* If the next thing is '<', class templates are types. */
if (looking_for_template)
flags |= LOOKUP_TEMPLATES_EXPECTED;
if (got_scope)
type = got_scope;
else if (got_object != error_mark_node)
type = got_object;
if (type)
{
if (type == error_mark_node)
return error_mark_node;
if (TREE_CODE (type) == TYPENAME_TYPE && TREE_TYPE (type))
type = TREE_TYPE (type);
if (TYPE_P (type))
type = complete_type (type);
if (TREE_CODE (type) == VOID_TYPE)
type = global_namespace;
if (TREE_CODE (type) == NAMESPACE_DECL)
{
val = make_node (CPLUS_BINDING);
flags |= LOOKUP_COMPLAIN;
if (!qualified_lookup_using_namespace (name, type, val, flags))
return NULL_TREE;
val = select_decl (val, flags);
}
else if (! IS_AGGR_TYPE (type)
|| TREE_CODE (type) == TEMPLATE_TYPE_PARM
|| TREE_CODE (type) == BOUND_TEMPLATE_TEMPLATE_PARM
|| TREE_CODE (type) == TYPENAME_TYPE)
/* Someone else will give an error about this if needed. */
val = NULL_TREE;
else if (type == current_class_type)
val = IDENTIFIER_CLASS_VALUE (name);
else
{
val = lookup_member (type, name, 0, prefer_type);
type_access_control (type, val);
/* Restore the containing TYPENAME_TYPE if we looked
through it before. */
if (got_scope && got_scope != type
&& val && TREE_CODE (val) == TYPE_DECL
&& TREE_CODE (TREE_TYPE (val)) == TYPENAME_TYPE)
TYPE_CONTEXT (TREE_TYPE (val)) = got_scope;
}
}
else
val = NULL_TREE;
if (got_scope)
goto done;
else if (got_object && val)
{
from_obj = val;
val = NULL_TREE;
}
}
else
{
flags = lookup_flags (prefer_type, namespaces_only);
/* If we're not parsing, we need to complain. */
flags |= LOOKUP_COMPLAIN;
}
/* First, look in non-namespace scopes. */
if (current_class_type == NULL_TREE)
nonclass = 1;
for (t = IDENTIFIER_BINDING (name); t; t = TREE_CHAIN (t))
{
tree binding;
if (!LOCAL_BINDING_P (t) && nonclass)
/* We're not looking for class-scoped bindings, so keep going. */
continue;
/* If this is the kind of thing we're looking for, we're done. */
if (qualify_lookup (BINDING_VALUE (t), flags))
binding = BINDING_VALUE (t);
else if ((flags & LOOKUP_PREFER_TYPES)
&& qualify_lookup (BINDING_TYPE (t), flags))
binding = BINDING_TYPE (t);
else
binding = NULL_TREE;
/* Handle access control on types from enclosing or base classes. */
if (binding && ! yylex
&& BINDING_LEVEL (t) && BINDING_LEVEL (t)->parm_flag == 2)
type_access_control (BINDING_LEVEL (t)->this_class, binding);
if (binding
&& (!val || !IMPLICIT_TYPENAME_TYPE_DECL_P (binding)))
{
if (val_is_implicit_typename && !yylex)
warn_about_implicit_typename_lookup (val, binding);
val = binding;
val_is_implicit_typename
= IMPLICIT_TYPENAME_TYPE_DECL_P (val);
if (!val_is_implicit_typename)
break;
}
}
/* Now lookup in namespace scopes. */
if (!val || val_is_implicit_typename)
{
t = unqualified_namespace_lookup (name, flags, 0);
if (t)
{
if (val_is_implicit_typename && !yylex)
warn_about_implicit_typename_lookup (val, t);
val = t;
}
}
done:
if (val)
{
/* This should only warn about types used in qualified-ids. */
if (from_obj && from_obj != val)
{
if (looking_for_typename && TREE_CODE (from_obj) == TYPE_DECL
&& TREE_CODE (val) == TYPE_DECL
&& ! same_type_p (TREE_TYPE (from_obj), TREE_TYPE (val)))
pedwarn ("\
lookup of `%D' in the scope of `%#T' (`%#D') \
does not match lookup in the current scope (`%#D')",
name, got_object, from_obj, val);
/* We don't change val to from_obj if got_object depends on
template parms because that breaks implicit typename for
destructor calls. */
if (! uses_template_parms (got_object))
val = from_obj;
}
/* If we have a single function from a using decl, pull it out. */
if (TREE_CODE (val) == OVERLOAD && ! really_overloaded_fn (val))
val = OVL_FUNCTION (val);
}
else if (from_obj)
val = from_obj;
return val;
}
tree
lookup_name_nonclass (name)
tree name;
{
return lookup_name_real (name, 0, 1, 0);
}
tree
lookup_function_nonclass (name, args)
tree name;
tree args;
{
return lookup_arg_dependent (name, lookup_name_nonclass (name), args);
}
tree
lookup_name_namespace_only (name)
tree name;
{
/* type-or-namespace, nonclass, namespace_only */
return lookup_name_real (name, 1, 1, 1);
}
tree
lookup_name (name, prefer_type)
tree name;
int prefer_type;
{
return lookup_name_real (name, prefer_type, 0, 0);
}
/* Similar to `lookup_name' but look only in the innermost non-class
binding level. */
tree
lookup_name_current_level (name)
tree name;
{
struct binding_level *b;
tree t = NULL_TREE;
b = current_binding_level;
while (b->parm_flag == 2)
b = b->level_chain;
if (b->namespace_p)
{
t = IDENTIFIER_NAMESPACE_VALUE (name);
/* extern "C" function() */
if (t != NULL_TREE && TREE_CODE (t) == TREE_LIST)
t = TREE_VALUE (t);
}
else if (IDENTIFIER_BINDING (name)
&& LOCAL_BINDING_P (IDENTIFIER_BINDING (name)))
{
while (1)
{
if (BINDING_LEVEL (IDENTIFIER_BINDING (name)) == b)
return IDENTIFIER_VALUE (name);
if (b->keep == 2)
b = b->level_chain;
else
break;
}
}
return t;
}
/* Like lookup_name_current_level, but for types. */
tree
lookup_type_current_level (name)
tree name;
{
register tree t = NULL_TREE;
my_friendly_assert (! current_binding_level->namespace_p, 980716);
if (REAL_IDENTIFIER_TYPE_VALUE (name) != NULL_TREE
&& REAL_IDENTIFIER_TYPE_VALUE (name) != global_type_node)
{
struct binding_level *b = current_binding_level;
while (1)
{
if (purpose_member (name, b->type_shadowed))
return REAL_IDENTIFIER_TYPE_VALUE (name);
if (b->keep == 2)
b = b->level_chain;
else
break;
}
}
return t;
}
void
begin_only_namespace_names ()
{
only_namespace_names = 1;
}
void
end_only_namespace_names ()
{
only_namespace_names = 0;
}
/* Push the declarations of builtin types into the namespace.
RID_INDEX is the index of the builtin type
in the array RID_POINTERS. NAME is the name used when looking
up the builtin type. TYPE is the _TYPE node for the builtin type. */
void
record_builtin_type (rid_index, name, type)
enum rid rid_index;
const char *name;
tree type;
{
tree rname = NULL_TREE, tname = NULL_TREE;
tree tdecl = NULL_TREE;
if ((int) rid_index < (int) RID_MAX)
rname = ridpointers[(int) rid_index];
if (name)
tname = get_identifier (name);
TYPE_BUILT_IN (type) = 1;
if (tname)
{
tdecl = pushdecl (build_decl (TYPE_DECL, tname, type));
set_identifier_type_value (tname, NULL_TREE);
if ((int) rid_index < (int) RID_MAX)
/* Built-in types live in the global namespace. */
SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
}
if (rname != NULL_TREE)
{
if (tname != NULL_TREE)
{
set_identifier_type_value (rname, NULL_TREE);
SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
}
else
{
tdecl = pushdecl (build_decl (TYPE_DECL, rname, type));
set_identifier_type_value (rname, NULL_TREE);
}
}
}
/* Record one of the standard Java types.
* Declare it as having the given NAME.
* If SIZE > 0, it is the size of one of the integral types;
* otherwise it is the negative of the size of one of the other types. */
static tree
record_builtin_java_type (name, size)
const char *name;
int size;
{
tree type, decl;
if (size > 0)
type = make_signed_type (size);
else if (size > -32)
{ /* "__java_char" or ""__java_boolean". */
type = make_unsigned_type (-size);
/*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
}
else
{ /* "__java_float" or ""__java_double". */
type = make_node (REAL_TYPE);
TYPE_PRECISION (type) = - size;
layout_type (type);
}
record_builtin_type (RID_MAX, name, type);
decl = TYPE_NAME (type);
/* Suppress generate debug symbol entries for these types,
since for normal C++ they are just clutter.
However, push_lang_context undoes this if extern "Java" is seen. */
DECL_IGNORED_P (decl) = 1;
TYPE_FOR_JAVA (type) = 1;
return type;
}
/* Push a type into the namespace so that the back-ends ignore it. */
static void
record_unknown_type (type, name)
tree type;
const char *name;
{
tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
/* Make sure the "unknown type" typedecl gets ignored for debug info. */
DECL_IGNORED_P (decl) = 1;
TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
TYPE_ALIGN (type) = 1;
TYPE_USER_ALIGN (type) = 0;
TYPE_MODE (type) = TYPE_MODE (void_type_node);
}
/* An string for which we should create an IDENTIFIER_NODE at
startup. */
typedef struct predefined_identifier
{
/* The name of the identifier. */
const char *const name;
/* The place where the IDENTIFIER_NODE should be stored. */
tree *const node;
/* Non-zero if this is the name of a constructor or destructor. */
const int ctor_or_dtor_p;
} predefined_identifier;
/* Create all the predefined identifiers. */
static void
initialize_predefined_identifiers ()
{
const predefined_identifier *pid;
/* A table of identifiers to create at startup. */
static const predefined_identifier predefined_identifiers[] = {
{ "C++", &lang_name_cplusplus, 0 },
{ "C", &lang_name_c, 0 },
{ "Java", &lang_name_java, 0 },
{ CTOR_NAME, &ctor_identifier, 1 },
{ "__base_ctor", &base_ctor_identifier, 1 },
{ "__comp_ctor", &complete_ctor_identifier, 1 },
{ DTOR_NAME, &dtor_identifier, 1 },
{ "__comp_dtor", &complete_dtor_identifier, 1 },
{ "__base_dtor", &base_dtor_identifier, 1 },
{ "__deleting_dtor", &deleting_dtor_identifier, 1 },
{ IN_CHARGE_NAME, &in_charge_identifier, 0 },
{ "nelts", &nelts_identifier, 0 },
{ THIS_NAME, &this_identifier, 0 },
{ VTABLE_DELTA_NAME, &delta_identifier, 0 },
{ VTABLE_PFN_NAME, &pfn_identifier, 0 },
{ "_vptr", &vptr_identifier, 0 },
{ "__vtt_parm", &vtt_parm_identifier, 0 },
{ "std", &std_identifier, 0 },
{ NULL, NULL, 0 }
};
for (pid = predefined_identifiers; pid->name; ++pid)
{
*pid->node = get_identifier (pid->name);
if (pid->ctor_or_dtor_p)
IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
}
}
/* Create the predefined scalar types of C,
and some nodes representing standard constants (0, 1, (void *)0).
Initialize the global binding level.
Make definitions for built-in primitive functions. */
void
cxx_init_decl_processing ()
{
tree void_ftype;
tree void_ftype_ptr;
/* Create all the identifiers we need. */
initialize_predefined_identifiers ();
/* Fill in back-end hooks. */
init_lang_status = &push_cp_function_context;
free_lang_status = &pop_cp_function_context;
mark_lang_status = &mark_cp_function_context;
lang_missing_noreturn_ok_p = &cp_missing_noreturn_ok_p;
cp_parse_init ();
init_decl2 ();
init_pt ();
/* Create the global variables. */
push_to_top_level ();
/* Enter the global namespace. */
my_friendly_assert (global_namespace == NULL_TREE, 375);
push_namespace (get_identifier ("::"));
global_namespace = current_namespace;
current_lang_name = NULL_TREE;
/* Adjust various flags based on command-line settings. */
if (! flag_permissive && ! pedantic)
flag_pedantic_errors = 1;
if (!flag_no_inline)
{
flag_inline_trees = 1;
flag_no_inline = 1;
}
if (flag_inline_functions)
{
flag_inline_trees = 2;
flag_inline_functions = 0;
}
/* In C++, we never create builtin functions whose name does not
begin with `__'. Users should be using headers to get prototypes
in C++. It would be nice if we could warn when `-fbuiltin' is
used explicitly, but we do not have that information. */
flag_no_builtin = 1;
/* Initially, C. */
current_lang_name = lang_name_c;
current_function_decl = NULL_TREE;
current_binding_level = NULL_BINDING_LEVEL;
free_binding_level = NULL_BINDING_LEVEL;
build_common_tree_nodes (flag_signed_char);
error_mark_list = build_tree_list (error_mark_node, error_mark_node);
TREE_TYPE (error_mark_list) = error_mark_node;
/* Make the binding_level structure for global names. */
pushlevel (0);
global_binding_level = current_binding_level;
/* The global level is the namespace level of ::. */
NAMESPACE_LEVEL (global_namespace) = global_binding_level;
declare_namespace_level ();
/* Create the `std' namespace. */
push_namespace (std_identifier);
std_node = current_namespace;
pop_namespace ();
lang_attribute_table = cp_attribute_table;
c_common_nodes_and_builtins ();
java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
java_short_type_node = record_builtin_java_type ("__java_short", 16);
java_int_type_node = record_builtin_java_type ("__java_int", 32);
java_long_type_node = record_builtin_java_type ("__java_long", 64);
java_float_type_node = record_builtin_java_type ("__java_float", -32);
java_double_type_node = record_builtin_java_type ("__java_double", -64);
java_char_type_node = record_builtin_java_type ("__java_char", -16);
java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
integer_two_node = build_int_2 (2, 0);
TREE_TYPE (integer_two_node) = integer_type_node;
integer_three_node = build_int_2 (3, 0);
TREE_TYPE (integer_three_node) = integer_type_node;
boolean_type_node = make_unsigned_type (BOOL_TYPE_SIZE);
TREE_SET_CODE (boolean_type_node, BOOLEAN_TYPE);
TYPE_MAX_VALUE (boolean_type_node) = build_int_2 (1, 0);
TREE_TYPE (TYPE_MAX_VALUE (boolean_type_node)) = boolean_type_node;
TYPE_PRECISION (boolean_type_node) = 1;
record_builtin_type (RID_BOOL, "bool", boolean_type_node);
boolean_false_node = build_int_2 (0, 0);
TREE_TYPE (boolean_false_node) = boolean_type_node;
boolean_true_node = build_int_2 (1, 0);
TREE_TYPE (boolean_true_node) = boolean_type_node;
signed_size_zero_node = build_int_2 (0, 0);
TREE_TYPE (signed_size_zero_node) = make_signed_type (TYPE_PRECISION (sizetype));
empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
#if 0
record_builtin_type (RID_MAX, NULL, string_type_node);
#endif
delta_type_node = ptrdiff_type_node;
vtable_index_type = ptrdiff_type_node;
vtt_parm_type = build_pointer_type (const_ptr_type_node);
lang_type_promotes_to = convert_type_from_ellipsis;
void_ftype = build_function_type (void_type_node, void_list_node);
void_ftype_ptr = build_function_type (void_type_node,
tree_cons (NULL_TREE,
ptr_type_node,
void_list_node));
void_ftype_ptr
= build_exception_variant (void_ftype_ptr, empty_except_spec);
/* C++ extensions */
unknown_type_node = make_node (UNKNOWN_TYPE);
record_unknown_type (unknown_type_node, "unknown type");
/* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
TREE_TYPE (unknown_type_node) = unknown_type_node;
/* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
result. */
TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
{
/* Make sure we get a unique function type, so we can give
its pointer type a name. (This wins for gdb.) */
tree vfunc_type = make_node (FUNCTION_TYPE);
TREE_TYPE (vfunc_type) = integer_type_node;
TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
layout_type (vfunc_type);
vtable_entry_type = build_pointer_type (vfunc_type);
}
record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
vtbl_type_node
= build_cplus_array_type (vtable_entry_type, NULL_TREE);
layout_type (vtbl_type_node);
vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
record_builtin_type (RID_MAX, NULL, vtbl_type_node);
vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
layout_type (vtbl_ptr_type_node);
record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
push_namespace (get_identifier ("__cxxabiv1"));
abi_node = current_namespace;
pop_namespace ();
global_type_node = make_node (LANG_TYPE);
record_unknown_type (global_type_node, "global type");
/* Now, C++. */
current_lang_name = lang_name_cplusplus;
{
tree bad_alloc_type_node, newtype, deltype;
tree ptr_ftype_sizetype;
push_namespace (std_identifier);
bad_alloc_type_node = xref_tag
(class_type_node, get_identifier ("bad_alloc"), 1);
pop_namespace ();
ptr_ftype_sizetype
= build_function_type (ptr_type_node,
tree_cons (NULL_TREE,
c_size_type_node,
void_list_node));
newtype = build_exception_variant
(ptr_ftype_sizetype, add_exception_specifier
(NULL_TREE, bad_alloc_type_node, -1));
deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
push_cp_library_fn (NEW_EXPR, newtype);
push_cp_library_fn (VEC_NEW_EXPR, newtype);
global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
push_cp_library_fn (VEC_DELETE_EXPR, deltype);
}
abort_fndecl
= build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
/* Perform other language dependent initializations. */
init_class_processing ();
init_init_processing ();
init_search_processing ();
init_rtti_processing ();
if (flag_exceptions)
init_exception_processing ();
if (! supports_one_only ())
flag_weak = 0;
make_fname_decl = cp_make_fname_decl;
start_fname_decls ();
/* Show we use EH for cleanups. */
using_eh_for_cleanups ();
/* Maintain consistency. Perhaps we should just complain if they
say -fwritable-strings? */
if (flag_writable_strings)
flag_const_strings = 0;
/* Add GC roots for all of our global variables. */
ggc_add_tree_root (c_global_trees, sizeof c_global_trees / sizeof(tree));
ggc_add_tree_root (cp_global_trees, sizeof cp_global_trees / sizeof(tree));
ggc_add_tree_root (&integer_three_node, 1);
ggc_add_tree_root (&integer_two_node, 1);
ggc_add_tree_root (&signed_size_zero_node, 1);
ggc_add_tree_root (&size_one_node, 1);
ggc_add_tree_root (&size_zero_node, 1);
ggc_add_root (&global_binding_level, 1, sizeof global_binding_level,
mark_binding_level);
ggc_add_root (&scope_chain, 1, sizeof scope_chain, &mark_saved_scope);
ggc_add_tree_root (&static_ctors, 1);
ggc_add_tree_root (&static_dtors, 1);
ggc_add_tree_root (&lastiddecl, 1);
ggc_add_tree_root (&last_function_parms, 1);
ggc_add_tree_root (&error_mark_list, 1);
ggc_add_tree_root (&global_namespace, 1);
ggc_add_tree_root (&global_type_node, 1);
ggc_add_tree_root (&anonymous_namespace_name, 1);
ggc_add_tree_root (&got_object, 1);
ggc_add_tree_root (&got_scope, 1);
ggc_add_tree_root (&current_lang_name, 1);
ggc_add_tree_root (&static_aggregates, 1);
ggc_add_tree_root (&free_bindings, 1);
}
/* Generate an initializer for a function naming variable from
NAME. NAME may be NULL, in which case we generate a special
ERROR_MARK node which should be replaced later. */
tree
cp_fname_init (name)
const char *name;
{
tree domain = NULL_TREE;
tree type;
tree init = NULL_TREE;
size_t length = 0;
if (name)
{
length = strlen (name);
domain = build_index_type (size_int (length));
init = build_string (length + 1, name);
}
type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
type = build_cplus_array_type (type, domain);
if (init)
TREE_TYPE (init) = type;
else
/* We don't know the value until instantiation time. Make
something which will be digested now, but replaced later. */
init = build (ERROR_MARK, type);
return init;
}
/* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
decl, NAME is the initialization string and TYPE_DEP indicates whether
NAME depended on the type of the function. We make use of that to detect
__PRETTY_FUNCTION__ inside a template fn. This is being done
lazily at the point of first use, so we musn't push the decl now. */
static tree
cp_make_fname_decl (id, type_dep)
tree id;
int type_dep;
{
const char *const name = (type_dep && processing_template_decl
? NULL : fname_as_string (type_dep));
tree init = cp_fname_init (name);
tree decl = build_decl (VAR_DECL, id, TREE_TYPE (init));
/* As we don't push the decl here, we must set the context. */
DECL_CONTEXT (decl) = current_function_decl;
DECL_PRETTY_FUNCTION_P (decl) = type_dep;
TREE_STATIC (decl) = 1;
TREE_READONLY (decl) = 1;
DECL_ARTIFICIAL (decl) = 1;
DECL_INITIAL (decl) = init;
TREE_USED (decl) = 1;
cp_finish_decl (decl, init, NULL_TREE, LOOKUP_ONLYCONVERTING);
return decl;
}
/* Entry point for the benefit of c_common_nodes_and_builtins.
Make a definition for a builtin function named NAME and whose data type
is TYPE. TYPE should be a function type with argument types.
CLASS and CODE tell later passes how to compile calls to this function.
See tree.h for possible values.
If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
the name to be called if we can't opencode the function. */
tree
builtin_function (name, type, code, class, libname)
const char *name;
tree type;
int code;
enum built_in_class class;
const char *libname;
{
tree decl = build_library_fn_1 (get_identifier (name), ERROR_MARK, type);
DECL_BUILT_IN_CLASS (decl) = class;
DECL_FUNCTION_CODE (decl) = code;
my_friendly_assert (DECL_CONTEXT (decl) == NULL_TREE, 392);
/* All builtins that don't begin with an `_' should go in the `std'
namespace. */
if (name[0] != '_')
{
push_namespace (std_identifier);
DECL_CONTEXT (decl) = std_node;
}
pushdecl (decl);
if (name[0] != '_')
pop_namespace ();
/* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
we cannot change DECL_ASSEMBLER_NAME until we have installed this
function in the namespace. */
if (libname)
SET_DECL_ASSEMBLER_NAME (decl, get_identifier (libname));
make_decl_rtl (decl, NULL);
/* Warn if a function in the namespace for users
is used without an occasion to consider it declared. */
if (name[0] != '_' || name[1] != '_')
DECL_ANTICIPATED (decl) = 1;
/* Possibly apply some default attributes to this built-in function. */
decl_attributes (&decl, NULL_TREE, 0);
return decl;
}
/* Generate a FUNCTION_DECL with the typical flags for a runtime library
function. Not called directly. */
static tree
build_library_fn_1 (name, operator_code, type)
tree name;
enum tree_code operator_code;
tree type;
{
tree fn = build_lang_decl (FUNCTION_DECL, name, type);
DECL_EXTERNAL (fn) = 1;
TREE_PUBLIC (fn) = 1;
DECL_ARTIFICIAL (fn) = 1;
TREE_NOTHROW (fn) = 1;
SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
SET_DECL_LANGUAGE (fn, lang_c);
return fn;
}
/* Returns the _DECL for a library function with C linkage.
We assume that such functions never throw; if this is incorrect,
callers should unset TREE_NOTHROW. */
tree
build_library_fn (name, type)
tree name;
tree type;
{
return build_library_fn_1 (name, ERROR_MARK, type);
}
/* Returns the _DECL for a library function with C++ linkage. */
static tree
build_cp_library_fn (name, operator_code, type)
tree name;
enum tree_code operator_code;
tree type;
{
tree fn = build_library_fn_1 (name, operator_code, type);
TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
SET_DECL_LANGUAGE (fn, lang_cplusplus);
set_mangled_name_for_decl (fn);
return fn;
}
/* Like build_library_fn, but takes a C string instead of an
IDENTIFIER_NODE. */
tree
build_library_fn_ptr (name, type)
const char *name;
tree type;
{
return build_library_fn (get_identifier (name), type);
}
/* Like build_cp_library_fn, but takes a C string instead of an
IDENTIFIER_NODE. */
tree
build_cp_library_fn_ptr (name, type)
const char *name;
tree type;
{
return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
}
/* Like build_library_fn, but also pushes the function so that we will
be able to find it via IDENTIFIER_GLOBAL_VALUE. */
tree
push_library_fn (name, type)
tree name, type;
{
tree fn = build_library_fn (name, type);
pushdecl_top_level (fn);
return fn;
}
/* Like build_cp_library_fn, but also pushes the function so that it
will be found by normal lookup. */
static tree
push_cp_library_fn (operator_code, type)
enum tree_code operator_code;
tree type;
{
tree fn = build_cp_library_fn (ansi_opname (operator_code),
operator_code,
type);
pushdecl (fn);
return fn;
}
/* Like push_library_fn, but takes a TREE_LIST of parm types rather than
a FUNCTION_TYPE. */
tree
push_void_library_fn (name, parmtypes)
tree name, parmtypes;
{
tree type = build_function_type (void_type_node, parmtypes);
return push_library_fn (name, type);
}
/* Like push_library_fn, but also note that this function throws
and does not return. Used for __throw_foo and the like. */
tree
push_throw_library_fn (name, type)
tree name, type;
{
tree fn = push_library_fn (name, type);
TREE_THIS_VOLATILE (fn) = 1;
TREE_NOTHROW (fn) = 0;
return fn;
}
/* Apply default attributes to a function, if a system function with default
attributes. */
void
insert_default_attributes (decl)
tree decl;
{
if (!DECL_EXTERN_C_FUNCTION_P (decl))
return;
if (!TREE_PUBLIC (decl))
return;
c_common_insert_default_attributes (decl);
}
/* When we call finish_struct for an anonymous union, we create
default copy constructors and such. But, an anonymous union
shouldn't have such things; this function undoes the damage to the
anonymous union type T.
(The reason that we create the synthesized methods is that we don't
distinguish `union { int i; }' from `typedef union { int i; } U'.
The first is an anonymous union; the second is just an ordinary
union type.) */
void
fixup_anonymous_aggr (t)
tree t;
{
tree *q;
/* Wipe out memory of synthesized methods */
TYPE_HAS_CONSTRUCTOR (t) = 0;
TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
TYPE_HAS_INIT_REF (t) = 0;
TYPE_HAS_CONST_INIT_REF (t) = 0;
TYPE_HAS_ASSIGN_REF (t) = 0;
TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
/* Splice the implicitly generated functions out of the TYPE_METHODS
list. */
q = &TYPE_METHODS (t);
while (*q)
{
if (DECL_ARTIFICIAL (*q))
*q = TREE_CHAIN (*q);
else
q = &TREE_CHAIN (*q);
}
/* ISO C++ 9.5.3. Anonymous unions may not have function members. */
if (TYPE_METHODS (t))
cp_error_at ("an anonymous union cannot have function members", t);
/* Anonymous aggregates cannot have fields with ctors, dtors or complex
assignment operators (because they cannot have these methods themselves).
For anonymous unions this is already checked because they are not allowed
in any union, otherwise we have to check it. */
if (TREE_CODE (t) != UNION_TYPE)
{
tree field, type;
for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
if (TREE_CODE (field) == FIELD_DECL)
{
type = TREE_TYPE (field);
if (CLASS_TYPE_P (type))
{
if (TYPE_NEEDS_CONSTRUCTING (type))
cp_error_at ("member %#D' with constructor not allowed in anonymous aggregate",
field);
if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
cp_error_at ("member %#D' with destructor not allowed in anonymous aggregate",
field);
if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
cp_error_at ("member %#D' with copy assignment operator not allowed in anonymous aggregate",
field);
}
}
}
}
/* Make sure that a declaration with no declarator is well-formed, i.e.
just defines a tagged type or anonymous union.
Returns the type defined, if any. */
tree
check_tag_decl (declspecs)
tree declspecs;
{
int found_type = 0;
int saw_friend = 0;
int saw_typedef = 0;
tree ob_modifier = NULL_TREE;
register tree link;
register tree t = NULL_TREE;
for (link = declspecs; link; link = TREE_CHAIN (link))
{
register tree value = TREE_VALUE (link);
if (TYPE_P (value)
|| TREE_CODE (value) == TYPE_DECL
|| (TREE_CODE (value) == IDENTIFIER_NODE
&& IDENTIFIER_GLOBAL_VALUE (value)
&& TREE_CODE (IDENTIFIER_GLOBAL_VALUE (value)) == TYPE_DECL))
{
++found_type;
if (found_type == 2 && TREE_CODE (value) == IDENTIFIER_NODE)
{
if (! in_system_header)
pedwarn ("redeclaration of C++ built-in type `%T'", value);
return NULL_TREE;
}
if (TYPE_P (value)
&& ((TREE_CODE (value) != TYPENAME_TYPE && IS_AGGR_TYPE (value))
|| TREE_CODE (value) == ENUMERAL_TYPE))
{
my_friendly_assert (TYPE_MAIN_DECL (value) != NULL_TREE, 261);
t = value;
}
}
else if (value == ridpointers[(int) RID_TYPEDEF])
saw_typedef = 1;
else if (value == ridpointers[(int) RID_FRIEND])
{
if (current_class_type == NULL_TREE
|| current_scope () != current_class_type)
ob_modifier = value;
else
saw_friend = 1;
}
else if (value == ridpointers[(int) RID_STATIC]
|| value == ridpointers[(int) RID_EXTERN]
|| value == ridpointers[(int) RID_AUTO]
|| value == ridpointers[(int) RID_REGISTER]
|| value == ridpointers[(int) RID_INLINE]
|| value == ridpointers[(int) RID_VIRTUAL]
|| value == ridpointers[(int) RID_CONST]
|| value == ridpointers[(int) RID_VOLATILE]
|| value == ridpointers[(int) RID_EXPLICIT])
ob_modifier = value;
}
if (found_type > 1)
error ("multiple types in one declaration");
if (t == NULL_TREE && ! saw_friend)
pedwarn ("declaration does not declare anything");
/* Check for an anonymous union. */
else if (t && IS_AGGR_TYPE_CODE (TREE_CODE (t))
&& TYPE_ANONYMOUS_P (t))
{
/* 7/3 In a simple-declaration, the optional init-declarator-list
can be omitted only when declaring a class (clause 9) or
enumeration (7.2), that is, when the decl-specifier-seq contains
either a class-specifier, an elaborated-type-specifier with
a class-key (9.1), or an enum-specifier. In these cases and
whenever a class-specifier or enum-specifier is present in the
decl-specifier-seq, the identifiers in these specifiers are among
the names being declared by the declaration (as class-name,
enum-names, or enumerators, depending on the syntax). In such
cases, and except for the declaration of an unnamed bit-field (9.6),
the decl-specifier-seq shall introduce one or more names into the
program, or shall redeclare a name introduced by a previous
declaration. [Example:
enum { }; // ill-formed
typedef class { }; // ill-formed
--end example] */
if (saw_typedef)
{
error ("missing type-name in typedef-declaration");
return NULL_TREE;
}
/* Anonymous unions are objects, so they can have specifiers. */;
SET_ANON_AGGR_TYPE_P (t);
if (TREE_CODE (t) != UNION_TYPE && pedantic && ! in_system_header)
pedwarn ("ISO C++ prohibits anonymous structs");
}
else if (ob_modifier)
{
if (ob_modifier == ridpointers[(int) RID_INLINE]
|| ob_modifier == ridpointers[(int) RID_VIRTUAL])
error ("`%D' can only be specified for functions", ob_modifier);
else if (ob_modifier == ridpointers[(int) RID_FRIEND])
error ("`%D' can only be specified inside a class", ob_modifier);
else if (ob_modifier == ridpointers[(int) RID_EXPLICIT])
error ("`%D' can only be specified for constructors",
ob_modifier);
else
error ("`%D' can only be specified for objects and functions",
ob_modifier);
}
return t;
}
/* Called when a declaration is seen that contains no names to declare.
If its type is a reference to a structure, union or enum inherited
from a containing scope, shadow that tag name for the current scope
with a forward reference.
If its type defines a new named structure or union
or defines an enum, it is valid but we need not do anything here.
Otherwise, it is an error.
C++: may have to grok the declspecs to learn about static,
complain for anonymous unions. */
void
shadow_tag (declspecs)
tree declspecs;
{
tree t = check_tag_decl (declspecs);
if (t)
maybe_process_partial_specialization (t);
/* This is where the variables in an anonymous union are
declared. An anonymous union declaration looks like:
union { ... } ;
because there is no declarator after the union, the parser
sends that declaration here. */
if (t && ANON_AGGR_TYPE_P (t))
{
fixup_anonymous_aggr (t);
if (TYPE_FIELDS (t))
{
tree decl = grokdeclarator (NULL_TREE, declspecs, NORMAL, 0,
NULL);
finish_anon_union (decl);
}
}
}
/* Decode a "typename", such as "int **", returning a ..._TYPE node. */
tree
groktypename (typename)
tree typename;
{
if (TREE_CODE (typename) != TREE_LIST)
return typename;
return grokdeclarator (TREE_VALUE (typename),
TREE_PURPOSE (typename),
TYPENAME, 0, NULL);
}
/* Decode a declarator in an ordinary declaration or data definition.
This is called as soon as the type information and variable name
have been parsed, before parsing the initializer if any.
Here we create the ..._DECL node, fill in its type,
and put it on the list of decls for the current context.
The ..._DECL node is returned as the value.
Exception: for arrays where the length is not specified,
the type is left null, to be filled in by `cp_finish_decl'.
Function definitions do not come here; they go to start_function
instead. However, external and forward declarations of functions
do go through here. Structure field declarations are done by
grokfield and not through here. */
tree
start_decl (declarator, declspecs, initialized, attributes, prefix_attributes)
tree declarator, declspecs;
int initialized;
tree attributes, prefix_attributes;
{
tree decl;
register tree type, tem;
tree context;
extern int have_extern_spec;
extern int used_extern_spec;
#if 0
/* See code below that used this. */
int init_written = initialized;
#endif
/* This should only be done once on the top most decl. */
if (have_extern_spec && !used_extern_spec)
{
declspecs = tree_cons (NULL_TREE, get_identifier ("extern"),
declspecs);
used_extern_spec = 1;
}
attributes = chainon (attributes, prefix_attributes);
decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
&attributes);
if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE)
return NULL_TREE;
type = TREE_TYPE (decl);
if (type == error_mark_node)
return NULL_TREE;
context = DECL_CONTEXT (decl);
if (initialized && context && TREE_CODE (context) == NAMESPACE_DECL
&& context != current_namespace && TREE_CODE (decl) == VAR_DECL)
{
/* When parsing the initializer, lookup should use the object's
namespace. */
push_decl_namespace (context);
}
/* We are only interested in class contexts, later. */
if (context && TREE_CODE (context) == NAMESPACE_DECL)
context = NULL_TREE;
if (initialized)
/* Is it valid for this decl to have an initializer at all?
If not, set INITIALIZED to zero, which will indirectly
tell `cp_finish_decl' to ignore the initializer once it is parsed. */
switch (TREE_CODE (decl))
{
case TYPE_DECL:
/* typedef foo = bar means give foo the same type as bar.
We haven't parsed bar yet, so `cp_finish_decl' will fix that up.
Any other case of an initialization in a TYPE_DECL is an error. */
if (pedantic || list_length (declspecs) > 1)
{
error ("typedef `%D' is initialized", decl);
initialized = 0;
}
break;
case FUNCTION_DECL:
error ("function `%#D' is initialized like a variable", decl);
initialized = 0;
break;
default:
break;
}
if (initialized)
{
if (! toplevel_bindings_p ()
&& DECL_EXTERNAL (decl))
warning ("declaration of `%#D' has `extern' and is initialized",
decl);
DECL_EXTERNAL (decl) = 0;
if (toplevel_bindings_p ())
TREE_STATIC (decl) = 1;
/* Tell `pushdecl' this is an initialized decl
even though we don't yet have the initializer expression.
Also tell `cp_finish_decl' it may store the real initializer. */
DECL_INITIAL (decl) = error_mark_node;
}
/* Set attributes here so if duplicate decl, will have proper attributes. */
cplus_decl_attributes (&decl, attributes, 0);
if (TREE_CODE (decl) == FUNCTION_DECL
&& DECL_DECLARED_INLINE_P (decl)
&& DECL_UNINLINABLE (decl)
&& lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
warning_with_decl (decl,
"inline function `%s' given attribute noinline");
if (context && COMPLETE_TYPE_P (complete_type (context)))
{
push_nested_class (context, 2);
if (TREE_CODE (decl) == VAR_DECL)
{
tree field = lookup_field (context, DECL_NAME (decl), 0, 0);
if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
error ("`%#D' is not a static member of `%#T'", decl, context);
else
{
if (DECL_CONTEXT (field) != context)
{
pedwarn ("ISO C++ does not permit `%T::%D' to be defined as `%T::%D'",
DECL_CONTEXT (field), DECL_NAME (decl),
context, DECL_NAME (decl));
DECL_CONTEXT (decl) = DECL_CONTEXT (field);
}
/* Static data member are tricky; an in-class initialization
still doesn't provide a definition, so the in-class
declaration will have DECL_EXTERNAL set, but will have an
initialization. Thus, duplicate_decls won't warn
about this situation, and so we check here. */
if (DECL_INITIAL (decl) && DECL_INITIAL (field))
error ("duplicate initialization of %D", decl);
if (duplicate_decls (decl, field))
decl = field;
}
}
else
{
tree field = check_classfn (context, decl);
if (field && duplicate_decls (decl, field))
decl = field;
}
/* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
DECL_IN_AGGR_P (decl) = 0;
if ((DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
|| CLASSTYPE_TEMPLATE_INSTANTIATION (context))
{
SET_DECL_TEMPLATE_SPECIALIZATION (decl);
/* [temp.expl.spec] An explicit specialization of a static data
member of a template is a definition if the declaration
includes an initializer; otherwise, it is a declaration.
We check for processing_specialization so this only applies
to the new specialization syntax. */
if (DECL_INITIAL (decl) == NULL_TREE && processing_specialization)
DECL_EXTERNAL (decl) = 1;
}
if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
pedwarn ("declaration of `%#D' outside of class is not definition",
decl);
}
/* Enter this declaration into the symbol table. */
tem = maybe_push_decl (decl);
if (processing_template_decl)
tem = push_template_decl (tem);
#if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
/* Tell the back-end to use or not use .common as appropriate. If we say
-fconserve-space, we want this to save .data space, at the expense of
wrong semantics. If we say -fno-conserve-space, we want this to
produce errors about redefs; to do this we force variables into the
data segment. */
DECL_COMMON (tem) = flag_conserve_space || ! TREE_PUBLIC (tem);
#endif
if (! processing_template_decl)
start_decl_1 (tem);
return tem;
}
void
start_decl_1 (decl)
tree decl;
{
tree type = TREE_TYPE (decl);
int initialized = (DECL_INITIAL (decl) != NULL_TREE);
if (type == error_mark_node)
return;
maybe_push_cleanup_level (type);
if (initialized)
/* Is it valid for this decl to have an initializer at all?
If not, set INITIALIZED to zero, which will indirectly
tell `cp_finish_decl' to ignore the initializer once it is parsed. */
{
/* Don't allow initializations for incomplete types except for
arrays which might be completed by the initialization. */
if (COMPLETE_TYPE_P (complete_type (type)))
; /* A complete type is ok. */
else if (TREE_CODE (type) != ARRAY_TYPE)
{
error ("variable `%#D' has initializer but incomplete type",
decl);
initialized = 0;
type = TREE_TYPE (decl) = error_mark_node;
}
else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
{
if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
error ("elements of array `%#D' have incomplete type", decl);
/* else we already gave an error in start_decl. */
initialized = 0;
}
}
if (!initialized
&& TREE_CODE (decl) != TYPE_DECL
&& TREE_CODE (decl) != TEMPLATE_DECL
&& type != error_mark_node
&& IS_AGGR_TYPE (type)
&& ! DECL_EXTERNAL (decl))
{
if ((! processing_template_decl || ! uses_template_parms (type))
&& !COMPLETE_TYPE_P (complete_type (type)))
{
error ("aggregate `%#D' has incomplete type and cannot be initialized",
decl);
/* Change the type so that assemble_variable will give
DECL an rtl we can live with: (mem (const_int 0)). */
type = TREE_TYPE (decl) = error_mark_node;
}
else
{
/* If any base type in the hierarchy of TYPE needs a constructor,
then we set initialized to 1. This way any nodes which are
created for the purposes of initializing this aggregate
will live as long as it does. This is necessary for global
aggregates which do not have their initializers processed until
the end of the file. */
initialized = TYPE_NEEDS_CONSTRUCTING (type);
}
}
if (! initialized)
DECL_INITIAL (decl) = NULL_TREE;
}
/* Handle initialization of references.
These three arguments are from `cp_finish_decl', and have the
same meaning here that they do there.
Quotes on semantics can be found in ARM 8.4.3. */
static tree
grok_reference_init (decl, type, init)
tree decl, type, init;
{
tree tmp;
if (init == NULL_TREE)
{
if ((DECL_LANG_SPECIFIC (decl) == 0
|| DECL_IN_AGGR_P (decl) == 0)
&& ! DECL_THIS_EXTERN (decl))
error ("`%D' declared as reference but not initialized", decl);
return NULL_TREE;
}
if (init == error_mark_node)
return NULL_TREE;
if (TREE_CODE (init) == CONSTRUCTOR)
{
error ("ISO C++ forbids use of initializer list to initialize reference `%D'", decl);
return NULL_TREE;
}
if (TREE_CODE (init) == TREE_LIST)
init = build_compound_expr (init);
if (TREE_CODE (TREE_TYPE (init)) == REFERENCE_TYPE)
init = convert_from_reference (init);
if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
&& TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
{
/* Note: default conversion is only called in very special cases. */
init = default_conversion (init);
}
/* Convert INIT to the reference type TYPE. This may involve the
creation of a temporary, whose lifetime must be the same as that
of the reference. If so, a DECL_STMT for the temporary will be
added just after the DECL_STMT for DECL. That's why we don't set
DECL_INITIAL for local references (instead assigning to them
explicitly); we need to allow the temporary to be initialized
first. */
tmp = convert_to_reference
(type, init, CONV_IMPLICIT,
LOOKUP_ONLYCONVERTING|LOOKUP_SPECULATIVELY|LOOKUP_NORMAL|DIRECT_BIND,
decl);
if (tmp == error_mark_node)
return NULL_TREE;
else if (tmp == NULL_TREE)
{
error ("cannot initialize `%T' from `%T'", type, TREE_TYPE (init));
return NULL_TREE;
}
if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
return tmp;
DECL_INITIAL (decl) = tmp;
return NULL_TREE;
}
/* Fill in DECL_INITIAL with some magical value to prevent expand_decl from
mucking with forces it does not comprehend (i.e. initialization with a
constructor). If we are at global scope and won't go into COMMON, fill
it in with a dummy CONSTRUCTOR to force the variable into .data;
otherwise we can use error_mark_node. */
static tree
obscure_complex_init (decl, init)
tree decl, init;
{
if (! flag_no_inline && TREE_STATIC (decl))
{
if (extract_init (decl, init))
return NULL_TREE;
}
#if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
if (toplevel_bindings_p () && ! DECL_COMMON (decl))
DECL_INITIAL (decl) = build (CONSTRUCTOR, TREE_TYPE (decl), NULL_TREE,
NULL_TREE);
else
#endif
DECL_INITIAL (decl) = error_mark_node;
return init;
}
/* When parsing `int a[] = {1, 2};' we don't know the size of the
array until we finish parsing the initializer. If that's the
situation we're in, update DECL accordingly. */
static void
maybe_deduce_size_from_array_init (decl, init)
tree decl;
tree init;
{
tree type = TREE_TYPE (decl);
if (TREE_CODE (type) == ARRAY_TYPE
&& TYPE_DOMAIN (type) == NULL_TREE
&& TREE_CODE (decl) != TYPE_DECL)
{
/* do_default is really a C-ism to deal with tentative definitions.
But let's leave it here to ease the eventual merge. */
int do_default = !DECL_EXTERNAL (decl);
tree initializer = init ? init : DECL_INITIAL (decl);
int failure = complete_array_type (type, initializer, do_default);
if (failure == 1)
error ("initializer fails to determine size of `%D'", decl);
if (failure == 2)
{
if (do_default)
error ("array size missing in `%D'", decl);
/* If a `static' var's size isn't known, make it extern as
well as static, so it does not get allocated. If it's not
`static', then don't mark it extern; finish_incomplete_decl
will give it a default size and it will get allocated. */
else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
DECL_EXTERNAL (decl) = 1;
}
if (pedantic && TYPE_DOMAIN (type) != NULL_TREE
&& tree_int_cst_lt (TYPE_MAX_VALUE (TYPE_DOMAIN (type)),
integer_zero_node))
error ("zero-size array `%D'", decl);
layout_decl (decl, 0);
}
}
/* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
any appropriate error messages regarding the layout. */
static void
layout_var_decl (decl)
tree decl;
{
tree type = TREE_TYPE (decl);
#if 0
tree ttype = target_type (type);
#endif
/* If we haven't already layed out this declaration, do so now.
Note that we must not call complete type for an external object
because it's type might involve templates that we are not
supposed to isntantiate yet. (And it's perfectly legal to say
`extern X x' for some incomplete type `X'.) */
if (!DECL_EXTERNAL (decl))
complete_type (type);
if (!DECL_SIZE (decl) && COMPLETE_TYPE_P (type))
layout_decl (decl, 0);
if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
{
/* An automatic variable with an incomplete type: that is an error.
Don't talk about array types here, since we took care of that
message in grokdeclarator. */
error ("storage size of `%D' isn't known", decl);
TREE_TYPE (decl) = error_mark_node;
}
#if 0
/* Keep this code around in case we later want to control debug info
based on whether a type is "used". (jason 1999-11-11) */
else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
/* Let debugger know it should output info for this type. */
note_debug_info_needed (ttype);
if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
note_debug_info_needed (DECL_CONTEXT (decl));
#endif
if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
&& DECL_SIZE (decl) != NULL_TREE
&& ! TREE_CONSTANT (DECL_SIZE (decl)))
{
if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
constant_expression_warning (DECL_SIZE (decl));
else
error ("storage size of `%D' isn't constant", decl);
}
if (TREE_STATIC (decl)
&& !DECL_ARTIFICIAL (decl)
&& current_function_decl
&& DECL_CONTEXT (decl) == current_function_decl)
push_local_name (decl);
}
/* If a local static variable is declared in an inline function, or if
we have a weak definition, we must endeavor to create only one
instance of the variable at link-time. */
static void
maybe_commonize_var (decl)
tree decl;
{
/* Static data in a function with comdat linkage also has comdat
linkage. */
if (TREE_STATIC (decl)
/* Don't mess with __FUNCTION__. */
&& ! DECL_ARTIFICIAL (decl)
&& current_function_decl
&& DECL_CONTEXT (decl) == current_function_decl
&& (DECL_DECLARED_INLINE_P (current_function_decl)
|| DECL_TEMPLATE_INSTANTIATION (current_function_decl))
&& TREE_PUBLIC (current_function_decl))
{
/* If flag_weak, we don't need to mess with this, as we can just
make the function weak, and let it refer to its unique local
copy. This works because we don't allow the function to be
inlined. */
if (! flag_weak)
{
if (DECL_INTERFACE_KNOWN (current_function_decl))
{
TREE_PUBLIC (decl) = 1;
DECL_EXTERNAL (decl) = DECL_EXTERNAL (current_function_decl);
}
else if (DECL_INITIAL (decl) == NULL_TREE
|| DECL_INITIAL (decl) == error_mark_node)
{
TREE_PUBLIC (decl) = 1;
DECL_COMMON (decl) = 1;
}
/* else we lose. We can only do this if we can use common,
which we can't if it has been initialized. */
if (!TREE_PUBLIC (decl))
{
cp_warning_at ("sorry: semantics of inline function static data `%#D' are wrong (you'll wind up with multiple copies)", decl);
cp_warning_at (" you can work around this by removing the initializer", decl);
}
}
else
comdat_linkage (decl);
}
else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
/* Set it up again; we might have set DECL_INITIAL since the last
time. */
comdat_linkage (decl);
}
/* Issue an error message if DECL is an uninitialized const variable. */
static void
check_for_uninitialized_const_var (decl)
tree decl;
{
tree type = TREE_TYPE (decl);
/* ``Unless explicitly declared extern, a const object does not have
external linkage and must be initialized. ($8.4; $12.1)'' ARM
7.1.6 */
if (TREE_CODE (decl) == VAR_DECL
&& TREE_CODE (type) != REFERENCE_TYPE
&& CP_TYPE_CONST_P (type)
&& !TYPE_NEEDS_CONSTRUCTING (type)
&& !DECL_INITIAL (decl))
error ("uninitialized const `%D'", decl);
}
/* Verify INIT (the initializer for DECL), and record the
initialization in DECL_INITIAL, if appropriate. Returns a new
value for INIT. */
static tree
check_initializer (decl, init)
tree decl;
tree init;
{
tree type;
if (TREE_CODE (decl) == FIELD_DECL)
return init;
type = TREE_TYPE (decl);
/* If `start_decl' didn't like having an initialization, ignore it now. */
if (init != NULL_TREE && DECL_INITIAL (decl) == NULL_TREE)
init = NULL_TREE;
/* Check the initializer. */
if (init)
{
/* Things that are going to be initialized need to have complete
type. */
TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
if (type == error_mark_node)
/* We will have already complained. */
init = NULL_TREE;
else if (COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
{
error ("variable-sized object `%D' may not be initialized", decl);
init = NULL_TREE;
}
else if (TREE_CODE (type) == ARRAY_TYPE
&& !COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
{
error ("elements of array `%#D' have incomplete type", decl);
init = NULL_TREE;
}
else if (TREE_CODE (type) != ARRAY_TYPE && !COMPLETE_TYPE_P (type))
{
error ("`%D' has incomplete type", decl);
TREE_TYPE (decl) = error_mark_node;
init = NULL_TREE;
}
}
if (TREE_CODE (decl) == CONST_DECL)
{
my_friendly_assert (TREE_CODE (decl) != REFERENCE_TYPE, 148);
DECL_INITIAL (decl) = init;
my_friendly_assert (init != NULL_TREE, 149);
init = NULL_TREE;
}
else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
{
init = grok_reference_init (decl, type, init);
if (init)
init = obscure_complex_init (decl, init);
}
else if (init)
{
if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
{
if (TREE_CODE (type) == ARRAY_TYPE)
init = digest_init (type, init, (tree *) 0);
else if (TREE_CODE (init) == CONSTRUCTOR
&& TREE_HAS_CONSTRUCTOR (init))
{
if (TYPE_NON_AGGREGATE_CLASS (type))
{
error ("`%D' must be initialized by constructor, not by `{...}'",
decl);
init = error_mark_node;
}
else
goto dont_use_constructor;
}
}
else
{
dont_use_constructor:
if (TREE_CODE (init) != TREE_VEC)
init = store_init_value (decl, init);
}
if (init)
/* We must hide the initializer so that expand_decl
won't try to do something it does not understand. */
init = obscure_complex_init (decl, init);
}
else if (DECL_EXTERNAL (decl))
;
else if (TYPE_P (type)
&& (IS_AGGR_TYPE (type) || TYPE_NEEDS_CONSTRUCTING (type)))
{
tree core_type = strip_array_types (type);
if (! TYPE_NEEDS_CONSTRUCTING (core_type))
{
if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
error ("structure `%D' with uninitialized const members", decl);
if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
error ("structure `%D' with uninitialized reference members",
decl);
}
check_for_uninitialized_const_var (decl);
if (COMPLETE_TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
init = obscure_complex_init (decl, NULL_TREE);
}
else
check_for_uninitialized_const_var (decl);
return init;
}
/* If DECL is not a local variable, give it RTL. */
static void
make_rtl_for_nonlocal_decl (decl, init, asmspec)
tree decl;
tree init;
const char *asmspec;
{
int toplev = toplevel_bindings_p ();
int defer_p;
/* Handle non-variables up front. */
if (TREE_CODE (decl) != VAR_DECL)
{
rest_of_decl_compilation (decl, asmspec, toplev, at_eof);
return;
}
/* If we see a class member here, it should be a static data
member. */
if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
{
my_friendly_assert (TREE_STATIC (decl), 19990828);
/* An in-class declaration of a static data member should be
external; it is only a declaration, and not a definition. */
if (init == NULL_TREE)
my_friendly_assert (DECL_EXTERNAL (decl), 20000723);
}
/* Set the DECL_ASSEMBLER_NAME for the variable. */
if (asmspec)
{
SET_DECL_ASSEMBLER_NAME (decl, get_identifier (asmspec));
/* The `register' keyword, when used together with an
asm-specification, indicates that the variable should be
placed in a particular register. */
if (DECL_REGISTER (decl))
DECL_C_HARD_REGISTER (decl) = 1;
}
/* We don't create any RTL for local variables. */
if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
return;
/* We defer emission of local statics until the corresponding
DECL_STMT is expanded. */
defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
/* We try to defer namespace-scope static constants so that they are
not emitted into the object file unnecessarily. */
if (!DECL_VIRTUAL_P (decl)
&& TREE_READONLY (decl)
&& DECL_INITIAL (decl) != NULL_TREE
&& DECL_INITIAL (decl) != error_mark_node
&& ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
&& toplev
&& !TREE_PUBLIC (decl))
{
/* Fool with the linkage according to #pragma interface. */
if (!interface_unknown)
{
TREE_PUBLIC (decl) = 1;
DECL_EXTERNAL (decl) = interface_only;
}
defer_p = 1;
}
/* If we're deferring the variable, we only need to make RTL if
there's an ASMSPEC. Otherwise, we'll lazily create it later when
we need it. (There's no way to lazily create RTL for things that
have assembly specs because the information about the specifier
isn't stored in the tree, yet) */
if (defer_p && asmspec)
make_decl_rtl (decl, asmspec);
/* If we're not deferring, go ahead and assemble the variable. */
else if (!defer_p)
rest_of_decl_compilation (decl, asmspec, toplev, at_eof);
}
/* The old ARM scoping rules injected variables declared in the
initialization statement of a for-statement into the surrounding
scope. We support this usage, in order to be backward-compatible.
DECL is a just-declared VAR_DECL; if necessary inject its
declaration into the surrounding scope. */
void
maybe_inject_for_scope_var (decl)
tree decl;
{
if (!DECL_NAME (decl))
return;
if (current_binding_level->is_for_scope)
{
struct binding_level *outer
= current_binding_level->level_chain;
/* Check to see if the same name is already bound at the outer
level, either because it was directly declared, or because a
dead for-decl got preserved. In either case, the code would
not have been valid under the ARM scope rules, so clear
is_for_scope for the current_binding_level.
Otherwise, we need to preserve the temp slot for decl to last
into the outer binding level. */
tree outer_binding
= TREE_CHAIN (IDENTIFIER_BINDING (DECL_NAME (decl)));
if (outer_binding && BINDING_LEVEL (outer_binding) == outer
&& (TREE_CODE (BINDING_VALUE (outer_binding))
== VAR_DECL)
&& DECL_DEAD_FOR_LOCAL (BINDING_VALUE (outer_binding)))
{
BINDING_VALUE (outer_binding)
= DECL_SHADOWED_FOR_VAR (BINDING_VALUE (outer_binding));
current_binding_level->is_for_scope = 0;
}
else if (DECL_IN_MEMORY_P (decl))
preserve_temp_slots (DECL_RTL (decl));
}
}
/* Generate code to initialize DECL (a local variable). */
void
initialize_local_var (decl, init, flags)
tree decl;
tree init;
int flags;
{
tree type = TREE_TYPE (decl);
/* If the type is bogus, don't bother initializing the variable. */
if (type == error_mark_node)
return;
if (DECL_SIZE (decl) == NULL_TREE && !TREE_STATIC (decl))
{
/* If we used it already as memory, it must stay in memory. */
DECL_INITIAL (decl) = NULL_TREE;
TREE_ADDRESSABLE (decl) = TREE_USED (decl);
}
/* Local statics are handled differently from ordinary automatic
variables. */
if (TREE_STATIC (decl))
{
if (TYPE_NEEDS_CONSTRUCTING (type) || init != NULL_TREE
|| TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
expand_static_init (decl, init);
return;
}
if (DECL_SIZE (decl) && type != error_mark_node)
{
int already_used;
/* Compute and store the initial value. */
already_used = TREE_USED (decl) || TREE_USED (type);
if (init || TYPE_NEEDS_CONSTRUCTING (type))
{
int saved_stmts_are_full_exprs_p;
my_friendly_assert (building_stmt_tree (), 20000906);
saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
current_stmt_tree ()->stmts_are_full_exprs_p = 1;
finish_expr_stmt (build_aggr_init (decl, init, flags));
current_stmt_tree ()->stmts_are_full_exprs_p =
saved_stmts_are_full_exprs_p;
}
/* Set this to 0 so we can tell whether an aggregate which was
initialized was ever used. Don't do this if it has a
destructor, so we don't complain about the 'resource
allocation is initialization' idiom. Now set
attribute((unused)) on types so decls of that type will be
marked used. (see TREE_USED, above.) */
if (TYPE_NEEDS_CONSTRUCTING (type)
&& ! already_used
&& TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
&& DECL_NAME (decl))
TREE_USED (decl) = 0;
else if (already_used)
TREE_USED (decl) = 1;
}
}
/* Generate code to destroy DECL (a local variable). */
static void
destroy_local_var (decl)
tree decl;
{
tree type = TREE_TYPE (decl);
tree cleanup;
/* Only variables get cleaned up. */
if (TREE_CODE (decl) != VAR_DECL)
return;
/* And only things with destructors need cleaning up. */
if (type == error_mark_node
|| TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
return;
if (TREE_CODE (decl) == VAR_DECL &&
(DECL_EXTERNAL (decl) || TREE_STATIC (decl)))
/* We don't clean up things that aren't defined in this
translation unit, or that need a static cleanup. The latter
are handled by finish_file. */
return;
/* Compute the cleanup. */
cleanup = maybe_build_cleanup (decl);
/* Record the cleanup required for this declaration. */
if (DECL_SIZE (decl) && TREE_TYPE (decl) != error_mark_node
&& cleanup)
finish_decl_cleanup (decl, cleanup);
}
/* Finish processing of a declaration;
install its line number and initial value.
If the length of an array type is not known before,
it must be determined now, from the initial value, or it is an error.
INIT holds the value of an initializer that should be allowed to escape
the normal rules.
FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
if the (init) syntax was used. */
void
cp_finish_decl (decl, init, asmspec_tree, flags)
tree decl, init;
tree asmspec_tree;
int flags;
{
register tree type;
tree ttype = NULL_TREE;
const char *asmspec = NULL;
int was_readonly = 0;
if (! decl)
{
if (init)
error ("assignment (not initialization) in declaration");
return;
}
/* If a name was specified, get the string. */
if (asmspec_tree)
asmspec = TREE_STRING_POINTER (asmspec_tree);
if (init && TREE_CODE (init) == NAMESPACE_DECL)
{
error ("cannot initialize `%D' to namespace `%D'",
decl, init);
init = NULL_TREE;
}
if (current_class_type
&& CP_DECL_CONTEXT (decl) == current_class_type
&& TYPE_BEING_DEFINED (current_class_type)
&& (DECL_INITIAL (decl) || init))
DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
if (TREE_CODE (decl) == VAR_DECL
&& DECL_CONTEXT (decl)
&& TREE_CODE (DECL_CONTEXT (decl)) == NAMESPACE_DECL
&& DECL_CONTEXT (decl) != current_namespace
&& init)
{
/* Leave the namespace of the object. */
pop_decl_namespace ();
}
type = TREE_TYPE (decl);
if (type == error_mark_node)
return;
if (TYPE_HAS_MUTABLE_P (type))
TREE_READONLY (decl) = 0;
if (processing_template_decl)
{
/* Add this declaration to the statement-tree. */
if (at_function_scope_p ()
&& TREE_CODE (decl) != RESULT_DECL)
add_decl_stmt (decl);
if (init && DECL_INITIAL (decl))
DECL_INITIAL (decl) = init;
goto finish_end0;
}
/* Parameters are handled by store_parm_decls, not cp_finish_decl. */
my_friendly_assert (TREE_CODE (decl) != PARM_DECL, 19990828);
/* Take care of TYPE_DECLs up front. */
if (TREE_CODE (decl) == TYPE_DECL)
{
if (init && DECL_INITIAL (decl))
{
/* typedef foo = bar; store the type of bar as the type of foo. */
TREE_TYPE (decl) = type = TREE_TYPE (init);
DECL_INITIAL (decl) = init = NULL_TREE;
}
if (type != error_mark_node
&& IS_AGGR_TYPE (type) && DECL_NAME (decl))
{
if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
warning ("shadowing previous type declaration of `%#D'", decl);
set_identifier_type_value (DECL_NAME (decl), type);
CLASSTYPE_GOT_SEMICOLON (type) = 1;
}
GNU_xref_decl (current_function_decl, decl);
/* If we have installed this as the canonical typedef for this
type, and that type has not been defined yet, delay emitting
the debug information for it, as we will emit it later. */
if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
&& !COMPLETE_TYPE_P (TREE_TYPE (decl)))
TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
rest_of_decl_compilation (decl, NULL,
DECL_CONTEXT (decl) == NULL_TREE, at_eof);
goto finish_end;
}
if (TREE_CODE (decl) != FUNCTION_DECL)
ttype = target_type (type);
if (! DECL_EXTERNAL (decl) && TREE_READONLY (decl)
&& TYPE_NEEDS_CONSTRUCTING (type))
{
/* Currently, GNU C++ puts constants in text space, making them
impossible to initialize. In the future, one would hope for
an operating system which understood the difference between
initialization and the running of a program. */
was_readonly = 1;
TREE_READONLY (decl) = 0;
}
if (TREE_CODE (decl) == FIELD_DECL && asmspec)
{
/* This must override the asm specifier which was placed by
grokclassfn. Lay this out fresh. */
SET_DECL_RTL (TREE_TYPE (decl), NULL_RTX);
SET_DECL_ASSEMBLER_NAME (decl, get_identifier (asmspec));
make_decl_rtl (decl, asmspec);
}
/* Deduce size of array from initialization, if not already known. */
init = check_initializer (decl, init);
maybe_deduce_size_from_array_init (decl, init);
GNU_xref_decl (current_function_decl, decl);
/* Add this declaration to the statement-tree. This needs to happen
after the call to check_initializer so that the DECL_STMT for a
reference temp is added before the DECL_STMT for the reference itself. */
if (building_stmt_tree ()
&& at_function_scope_p ()
&& TREE_CODE (decl) != RESULT_DECL)
add_decl_stmt (decl);
if (TREE_CODE (decl) == VAR_DECL)
layout_var_decl (decl);
/* Output the assembler code and/or RTL code for variables and functions,
unless the type is an undefined structure or union.
If not, it will get done when the type is completed. */
if (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == FUNCTION_DECL
|| TREE_CODE (decl) == RESULT_DECL)
{
if (TREE_CODE (decl) == VAR_DECL)
maybe_commonize_var (decl);
make_rtl_for_nonlocal_decl (decl, init, asmspec);
if (TREE_CODE (type) == FUNCTION_TYPE
|| TREE_CODE (type) == METHOD_TYPE)
abstract_virtuals_error (decl,
strip_array_types (TREE_TYPE (type)));
else
abstract_virtuals_error (decl, strip_array_types (type));
if (TREE_CODE (decl) == FUNCTION_DECL)
;
else if (DECL_EXTERNAL (decl)
&& ! (DECL_LANG_SPECIFIC (decl)
&& DECL_NOT_REALLY_EXTERN (decl)))
{
if (init)
DECL_INITIAL (decl) = init;
}
else if (TREE_CODE (CP_DECL_CONTEXT (decl)) == FUNCTION_DECL)
{
/* This is a local declaration. */
if (doing_semantic_analysis_p ())
maybe_inject_for_scope_var (decl);
/* Initialize the local variable. But, if we're building a
statement-tree, we'll do the initialization when we
expand the tree. */
if (processing_template_decl)
{
if (init || DECL_INITIAL (decl) == error_mark_node)
DECL_INITIAL (decl) = init;
}
else
{
/* If we're not building RTL, then we need to do so
now. */
my_friendly_assert (building_stmt_tree (), 20000906);
/* Initialize the variable. */
initialize_local_var (decl, init, flags);
/* Clean up the variable. */
destroy_local_var (decl);
}
}
else if (TREE_STATIC (decl) && type != error_mark_node)
{
/* Cleanups for static variables are handled by `finish_file'. */
if (TYPE_NEEDS_CONSTRUCTING (type) || init != NULL_TREE
|| TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
expand_static_init (decl, init);
}
finish_end0:
/* Undo call to `pushclass' that was done in `start_decl'
due to initialization of qualified member variable.
I.e., Foo::x = 10; */
{
tree context = CP_DECL_CONTEXT (decl);
if (context
&& TYPE_P (context)
&& (TREE_CODE (decl) == VAR_DECL
/* We also have a pushclass done that we need to undo here
if we're at top level and declare a method. */
|| TREE_CODE (decl) == FUNCTION_DECL)
/* If size hasn't been set, we're still defining it,
and therefore inside the class body; don't pop
the binding level.. */
&& COMPLETE_TYPE_P (context)
&& context == current_class_type)
pop_nested_class ();
}
}
finish_end:
if (was_readonly)
TREE_READONLY (decl) = 1;
}
/* This is here for a midend callback from c-common.c */
void
finish_decl (decl, init, asmspec_tree)
tree decl, init;
tree asmspec_tree;
{
cp_finish_decl (decl, init, asmspec_tree, 0);
}
/* Returns a declaration for a VAR_DECL as if:
extern "C" TYPE NAME;
had been seen. Used to create compiler-generated global
variables. */
tree
declare_global_var (name, type)
tree name;
tree type;
{
tree decl;
push_to_top_level ();
decl = build_decl (VAR_DECL, name, type);
TREE_PUBLIC (decl) = 1;
DECL_EXTERNAL (decl) = 1;
DECL_ARTIFICIAL (decl) = 1;
pushdecl (decl);
cp_finish_decl (decl, NULL_TREE, NULL_TREE, 0);
pop_from_top_level ();
return decl;
}
/* Returns a pointer to the `atexit' function. Note that if
FLAG_USE_CXA_ATEXIT is non-zero, then this will actually be the new
`__cxa_atexit' function specified in the IA64 C++ ABI. */
static tree
get_atexit_node ()
{
tree atexit_fndecl;
tree arg_types;
tree fn_type;
tree fn_ptr_type;
const char *name;
if (atexit_node)
return atexit_node;
if (flag_use_cxa_atexit)
{
/* The declaration for `__cxa_atexit' is:
int __cxa_atexit (void (*)(void *), void *, void *)
We build up the argument types and then then function type
itself. */
/* First, build the pointer-to-function type for the first
argument. */
arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
fn_type = build_function_type (void_type_node, arg_types);
fn_ptr_type = build_pointer_type (fn_type);
/* Then, build the rest of the argument types. */
arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
/* And the final __cxa_atexit type. */
fn_type = build_function_type (integer_type_node, arg_types);
fn_ptr_type = build_pointer_type (fn_type);
name = "__cxa_atexit";
}
else
{
/* The declaration for `atexit' is:
int atexit (void (*)());
We build up the argument types and then then function type
itself. */
fn_type = build_function_type (void_type_node, void_list_node);
fn_ptr_type = build_pointer_type (fn_type);
arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
/* Build the final atexit type. */
fn_type = build_function_type (integer_type_node, arg_types);
name = "atexit";
}
/* Now, build the function declaration. */
push_lang_context (lang_name_c);
atexit_fndecl = build_library_fn_ptr (name, fn_type);
mark_used (atexit_fndecl);
pop_lang_context ();
atexit_node = default_conversion (atexit_fndecl);
return atexit_node;
}
/* Returns the __dso_handle VAR_DECL. */
static tree
get_dso_handle_node ()
{
if (dso_handle_node)
return dso_handle_node;
/* Declare the variable. */
dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
ptr_type_node);
return dso_handle_node;
}
/* Begin a new function with internal linkage whose job will be simply
to destroy some particular variable. */
static tree
start_cleanup_fn ()
{
static int counter = 0;
int old_interface_unknown = interface_unknown;
char name[32];
tree parmtypes;
tree fntype;
tree fndecl;
push_to_top_level ();
/* No need to mangle this. */
push_lang_context (lang_name_c);
interface_unknown = 1;
/* Build the parameter-types. */
parmtypes = void_list_node;
/* Functions passed to __cxa_atexit take an additional parameter.
We'll just ignore it. After we implement the new calling
convention for destructors, we can eliminate the use of
additional cleanup functions entirely in the -fnew-abi case. */
if (flag_use_cxa_atexit)
parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
/* Build the function type itself. */
fntype = build_function_type (void_type_node, parmtypes);
/* Build the name of the function. */
sprintf (name, "__tcf_%d", counter++);
/* Build the function declaration. */
fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
/* It's a function with internal linkage, generated by the
compiler. */
TREE_PUBLIC (fndecl) = 0;
DECL_ARTIFICIAL (fndecl) = 1;
/* Make the function `inline' so that it is only emitted if it is
actually needed. It is unlikely that it will be inlined, since
it is only called via a function pointer, but we avoid unnecessary
emissions this way. */
DECL_INLINE (fndecl) = 1;
/* Build the parameter. */
if (flag_use_cxa_atexit)
{
tree parmdecl;
parmdecl = build_decl (PARM_DECL, NULL_TREE, ptr_type_node);
DECL_CONTEXT (parmdecl) = fndecl;
DECL_ARG_TYPE (parmdecl) = ptr_type_node;
TREE_USED (parmdecl) = 1;
DECL_ARGUMENTS (fndecl) = parmdecl;
}
pushdecl (fndecl);
start_function (/*specs=*/NULL_TREE, fndecl, NULL_TREE, SF_PRE_PARSED);
interface_unknown = old_interface_unknown;
pop_lang_context ();
return current_function_decl;
}
/* Finish the cleanup function begun by start_cleanup_fn. */
static void
end_cleanup_fn ()
{
expand_body (finish_function (0));
pop_from_top_level ();
}
/* Generate code to handle the destruction of DECL, an object with
static storage duration. */
void
register_dtor_fn (decl)
tree decl;
{
tree cleanup;
tree compound_stmt;
tree args;
tree fcall;
int saved_flag_access_control;
if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
return;
/* Call build_cleanup before we enter the anonymous function so that
any access checks will be done relative to the current scope,
rather than the scope of the anonymous function. */
build_cleanup (decl);
/* Now start the function. */
cleanup = start_cleanup_fn ();
/* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
to the original function, rather than the anonymous one. That
will make the back-end think that nested functions are in use,
which causes confusion. */
saved_flag_access_control = flag_access_control;
flag_access_control = 0;
fcall = build_cleanup (decl);
flag_access_control = saved_flag_access_control;
/* Create the body of the anonymous function. */
compound_stmt = begin_compound_stmt (/*has_no_scope=*/0);
finish_expr_stmt (fcall);
finish_compound_stmt (/*has_no_scope=*/0, compound_stmt);
end_cleanup_fn ();
/* Call atexit with the cleanup function. */
mark_addressable (cleanup);
cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
if (flag_use_cxa_atexit)
{
args = tree_cons (NULL_TREE, get_dso_handle_node (), NULL_TREE);
args = tree_cons (NULL_TREE, null_pointer_node, args);
args = tree_cons (NULL_TREE, cleanup, args);
}
else
args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
finish_expr_stmt (build_function_call (get_atexit_node (), args));
}
void
expand_static_init (decl, init)
tree decl;
tree init;
{
tree oldstatic = value_member (decl, static_aggregates);
if (oldstatic)
{
if (TREE_PURPOSE (oldstatic) && init != NULL_TREE)
error ("multiple initializations given for `%D'", decl);
}
else if (! toplevel_bindings_p ())
{
/* Emit code to perform this initialization but once. */
tree if_stmt;
tree then_clause;
tree assignment;
tree guard;
tree guard_init;
/* Emit code to perform this initialization but once. This code
looks like:
static int guard = 0;
if (!guard) {
// Do initialization.
guard = 1;
// Register variable for destruction at end of program.
}
Note that the `temp' variable is only set to 1 *after* the
initialization is complete. This ensures that an exception,
thrown during the construction, will cause the variable to
reinitialized when we pass through this code again, as per:
[stmt.dcl]
If the initialization exits by throwing an exception, the
initialization is not complete, so it will be tried again
the next time control enters the declaration.
In theory, this process should be thread-safe, too; multiple
threads should not be able to initialize the variable more
than once. We don't yet attempt to ensure thread-safety. */
/* Create the guard variable. */
guard = get_guard (decl);
/* Begin the conditional initialization. */
if_stmt = begin_if_stmt ();
finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
then_clause = begin_compound_stmt (/*has_no_scope=*/0);
/* Do the initialization itself. */
if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
|| (init && TREE_CODE (init) == TREE_LIST))
assignment = build_aggr_init (decl, init, 0);
else if (init)
/* The initialization we're doing here is just a bitwise
copy. */
assignment = build (INIT_EXPR, TREE_TYPE (decl), decl, init);
else
assignment = NULL_TREE;
/* Once the assignment is complete, set TEMP to 1. Since the
construction of the static object is complete at this point,
we want to make sure TEMP is set to 1 even if a temporary
constructed during the initialization throws an exception
when it is destroyed. So, we combine the initialization and
the assignment to TEMP into a single expression, ensuring
that when we call finish_expr_stmt the cleanups will not be
run until after TEMP is set to 1. */
guard_init = set_guard (guard);
if (assignment)
{
assignment = tree_cons (NULL_TREE, assignment,
build_tree_list (NULL_TREE,
guard_init));
assignment = build_compound_expr (assignment);
}
else
assignment = guard_init;
finish_expr_stmt (assignment);
/* Use atexit to register a function for destroying this static
variable. */
register_dtor_fn (decl);
finish_compound_stmt (/*has_no_scope=*/0, then_clause);
finish_then_clause (if_stmt);
finish_if_stmt ();
}
else
static_aggregates = tree_cons (init, decl, static_aggregates);
}
/* Finish the declaration of a catch-parameter. */
tree
start_handler_parms (declspecs, declarator)
tree declspecs;
tree declarator;
{
tree decl;
if (declspecs)
{
decl = grokdeclarator (declarator, declspecs, CATCHPARM,
1, NULL);
if (decl == NULL_TREE)
error ("invalid catch parameter");
}
else
decl = NULL_TREE;
return decl;
}
/* Make TYPE a complete type based on INITIAL_VALUE.
Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
2 if there was no information (in which case assume 0 if DO_DEFAULT). */
int
complete_array_type (type, initial_value, do_default)
tree type, initial_value;
int do_default;
{
register tree maxindex = NULL_TREE;
int value = 0;
if (initial_value)
{
/* An array of character type can be initialized from a
brace-enclosed string constant. */
if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type)))
&& TREE_CODE (initial_value) == CONSTRUCTOR
&& CONSTRUCTOR_ELTS (initial_value)
&& (TREE_CODE (TREE_VALUE (CONSTRUCTOR_ELTS (initial_value)))
== STRING_CST)
&& TREE_CHAIN (CONSTRUCTOR_ELTS (initial_value)) == NULL_TREE)
initial_value = TREE_VALUE (CONSTRUCTOR_ELTS (initial_value));
/* Note MAXINDEX is really the maximum index, one less than the
size. */
if (TREE_CODE (initial_value) == STRING_CST)
{
int eltsize
= int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value)));
maxindex = build_int_2 ((TREE_STRING_LENGTH (initial_value)
/ eltsize) - 1, 0);
}
else if (TREE_CODE (initial_value) == CONSTRUCTOR)
{
tree elts = CONSTRUCTOR_ELTS (initial_value);
maxindex = ssize_int (-1);
for (; elts; elts = TREE_CHAIN (elts))
{
if (TREE_PURPOSE (elts))
maxindex = TREE_PURPOSE (elts);
else
maxindex = size_binop (PLUS_EXPR, maxindex, ssize_int (1));
}
maxindex = copy_node (maxindex);
}
else
{
/* Make an error message unless that happened already. */
if (initial_value != error_mark_node)
value = 1;
else
initial_value = NULL_TREE;
/* Prevent further error messages. */
maxindex = build_int_2 (0, 0);
}
}
if (!maxindex)
{
if (do_default)
maxindex = build_int_2 (0, 0);
value = 2;
}
if (maxindex)
{
tree itype;
tree domain;
domain = build_index_type (maxindex);
TYPE_DOMAIN (type) = domain;
if (! TREE_TYPE (maxindex))
TREE_TYPE (maxindex) = domain;
if (initial_value)
itype = TREE_TYPE (initial_value);
else
itype = NULL;
if (itype && !TYPE_DOMAIN (itype))
TYPE_DOMAIN (itype) = domain;
/* The type of the main variant should never be used for arrays
of different sizes. It should only ever be completed with the
size of the array. */
if (! TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)))
TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)) = domain;
}
/* Lay out the type now that we can get the real answer. */
layout_type (type);
return value;
}
/* Return zero if something is declared to be a member of type
CTYPE when in the context of CUR_TYPE. STRING is the error
message to print in that case. Otherwise, quietly return 1. */
static int
member_function_or_else (ctype, cur_type, flags)
tree ctype, cur_type;
enum overload_flags flags;
{
if (ctype && ctype != cur_type)
{
if (flags == DTOR_FLAG)
error ("destructor for alien class `%T' cannot be a member",
ctype);
else
error ("constructor for alien class `%T' cannot be a member",
ctype);
return 0;
}
return 1;
}
/* Subroutine of `grokdeclarator'. */
/* Generate errors possibly applicable for a given set of specifiers.
This is for ARM $7.1.2. */
static void
bad_specifiers (object, type, virtualp, quals, inlinep, friendp, raises)
tree object;
const char *type;
int virtualp, quals, friendp, raises, inlinep;
{
if (virtualp)
error ("`%D' declared as a `virtual' %s", object, type);
if (inlinep)
error ("`%D' declared as an `inline' %s", object, type);
if (quals)
error ("`const' and `volatile' function specifiers on `%D' invalid in %s declaration",
object, type);
if (friendp)
cp_error_at ("`%D' declared as a friend", object);
if (raises
&& (TREE_CODE (object) == TYPE_DECL
|| (!TYPE_PTRFN_P (TREE_TYPE (object))
&& !TYPE_REFFN_P (TREE_TYPE (object))
&& !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
cp_error_at ("`%D' declared with an exception specification", object);
}
/* CTYPE is class type, or null if non-class.
TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
or METHOD_TYPE.
DECLARATOR is the function's name.
VIRTUALP is truthvalue of whether the function is virtual or not.
FLAGS are to be passed through to `grokclassfn'.
QUALS are qualifiers indicating whether the function is `const'
or `volatile'.
RAISES is a list of exceptions that this function can raise.
CHECK is 1 if we must find this method in CTYPE, 0 if we should
not look, and -1 if we should not call `grokclassfn' at all.
Returns `NULL_TREE' if something goes wrong, after issuing
applicable error messages. */
static tree
grokfndecl (ctype, type, declarator, orig_declarator, virtualp, flags, quals,
raises, check, friendp, publicp, inlinep, funcdef_flag,
template_count, in_namespace)
tree ctype, type;
tree declarator;
tree orig_declarator;
int virtualp;
enum overload_flags flags;
tree quals, raises;
int check, friendp, publicp, inlinep, funcdef_flag, template_count;
tree in_namespace;
{
tree decl;
int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
int has_default_arg = 0;
tree t;
if (raises)
type = build_exception_variant (type, raises);
decl = build_lang_decl (FUNCTION_DECL, declarator, type);
/* Propagate volatile out from type to decl. */
if (TYPE_VOLATILE (type))
TREE_THIS_VOLATILE (decl) = 1;
/* If this decl has namespace scope, set that up. */
if (in_namespace)
set_decl_namespace (decl, in_namespace, friendp);
else if (!ctype)
DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
/* `main' and builtins have implicit 'C' linkage. */
if ((MAIN_NAME_P (declarator)
|| (IDENTIFIER_LENGTH (declarator) > 10
&& IDENTIFIER_POINTER (declarator)[0] == '_'
&& IDENTIFIER_POINTER (declarator)[1] == '_'
&& strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
&& current_lang_name == lang_name_cplusplus
&& ctype == NULL_TREE
/* NULL_TREE means global namespace. */
&& DECL_CONTEXT (decl) == NULL_TREE)
SET_DECL_LANGUAGE (decl, lang_c);
/* Should probably propagate const out from type to decl I bet (mrs). */
if (staticp)
{
DECL_STATIC_FUNCTION_P (decl) = 1;
DECL_CONTEXT (decl) = ctype;
}
if (ctype)
DECL_CONTEXT (decl) = ctype;
if (ctype == NULL_TREE && DECL_MAIN_P (decl))
{
if (processing_template_decl)
error ("cannot declare `::main' to be a template");
if (inlinep)
error ("cannot declare `::main' to be inline");
if (!publicp)
error ("cannot declare `::main' to be static");
if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
integer_type_node))
error ("`main' must return `int'");
inlinep = 0;
publicp = 1;
}
/* Members of anonymous types and local classes have no linkage; make
them internal. */
/* FIXME what if it gets a name from typedef? */
if (ctype && (TYPE_ANONYMOUS_P (ctype)
|| decl_function_context (TYPE_MAIN_DECL (ctype))))
publicp = 0;
if (publicp)
{
/* [basic.link]: A name with no linkage (notably, the name of a class
or enumeration declared in a local scope) shall not be used to
declare an entity with linkage.
Only check this for public decls for now. */
t = no_linkage_check (TREE_TYPE (decl));
if (t)
{
if (TYPE_ANONYMOUS_P (t))
{
if (DECL_EXTERN_C_P (decl))
/* Allow this; it's pretty common in C. */;
else
{
pedwarn ("non-local function `%#D' uses anonymous type",
decl);
if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
cp_pedwarn_at ("\
`%#D' does not refer to the unqualified type, so it is not used for linkage",
TYPE_NAME (t));
}
}
else
pedwarn ("non-local function `%#D' uses local type `%T'",
decl, t);
}
}
TREE_PUBLIC (decl) = publicp;
if (! publicp)
{
DECL_INTERFACE_KNOWN (decl) = 1;
DECL_NOT_REALLY_EXTERN (decl) = 1;
}
/* If the declaration was declared inline, mark it as such. */
if (inlinep)
DECL_DECLARED_INLINE_P (decl) = 1;
/* We inline functions that are explicitly declared inline, or, when
the user explicitly asks us to, all functions. */
if (DECL_DECLARED_INLINE_P (decl) || flag_inline_trees == 2)
DECL_INLINE (decl) = 1;
DECL_EXTERNAL (decl) = 1;
if (quals != NULL_TREE && TREE_CODE (type) == FUNCTION_TYPE)
{
error ("%smember function `%D' cannot have `%T' method qualifier",
(ctype ? "static " : "non-"), decl, TREE_VALUE (quals));
quals = NULL_TREE;
}
if (IDENTIFIER_OPNAME_P (DECL_NAME (decl)))
grok_op_properties (decl, friendp);
if (ctype && decl_function_context (decl))
DECL_NO_STATIC_CHAIN (decl) = 1;
for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
if (TREE_PURPOSE (t)
&& TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
{
has_default_arg = 1;
break;
}
if (friendp
&& TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
{
if (funcdef_flag)
error
("defining explicit specialization `%D' in friend declaration",
orig_declarator);
else
{
tree fns = TREE_OPERAND (orig_declarator, 0);
tree args = TREE_OPERAND (orig_declarator, 1);
if (PROCESSING_REAL_TEMPLATE_DECL_P ())
{
/* Something like `template <class T> friend void f<T>()'. */
error ("invalid use of template-id `%D' in declaration of primary template",
orig_declarator);
return NULL_TREE;
}
/* A friend declaration of the form friend void f<>(). Record
the information in the TEMPLATE_ID_EXPR. */
SET_DECL_IMPLICIT_INSTANTIATION (decl);
if (TREE_CODE (fns) == COMPONENT_REF)
{
/* Due to bison parser ickiness, we will have already looked
up an operator_name or PFUNCNAME within the current class
(see template_id in parse.y). If the current class contains
such a name, we'll get a COMPONENT_REF here. Undo that. */
my_friendly_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
== current_class_type, 20001120);
fns = TREE_OPERAND (fns, 1);
}
my_friendly_assert (TREE_CODE (fns) == IDENTIFIER_NODE
|| TREE_CODE (fns) == LOOKUP_EXPR
|| TREE_CODE (fns) == OVERLOAD, 20001120);
DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
if (has_default_arg)
{
error ("default arguments are not allowed in declaration of friend template specialization `%D'",
decl);
return NULL_TREE;
}
if (inlinep)
{
error ("`inline' is not allowed in declaration of friend template specialization `%D'",
decl);
return NULL_TREE;
}
}
}
if (has_default_arg)
add_defarg_fn (decl);
if (funcdef_flag)
/* Make the init_value nonzero so pushdecl knows this is not
tentative. error_mark_node is replaced later with the BLOCK. */
DECL_INITIAL (decl) = error_mark_node;
if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
TREE_NOTHROW (decl) = 1;
/* Caller will do the rest of this. */
if (check < 0)
return decl;
if (flags == NO_SPECIAL && ctype && constructor_name (ctype) == declarator)
DECL_CONSTRUCTOR_P (decl) = 1;
/* Function gets the ugly name, field gets the nice one. This call
may change the type of the function (because of default
parameters)! */
if (ctype != NULL_TREE)
grokclassfn (ctype, decl, flags, quals);
decl = check_explicit_specialization (orig_declarator, decl,
template_count,
2 * (funcdef_flag != 0) +
4 * (friendp != 0));
if (decl == error_mark_node)
return NULL_TREE;
if (ctype != NULL_TREE
&& (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
&& check)
{
tree old_decl;
old_decl = check_classfn (ctype, decl);
if (old_decl && TREE_CODE (old_decl) == TEMPLATE_DECL)
/* Because grokfndecl is always supposed to return a
FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
here. We depend on our callers to figure out that its
really a template that's being returned. */
old_decl = DECL_TEMPLATE_RESULT (old_decl);
if (old_decl && DECL_STATIC_FUNCTION_P (old_decl)
&& TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
{
/* Remove the `this' parm added by grokclassfn.
XXX Isn't this done in start_function, too? */
revert_static_member_fn (decl);
last_function_parms = TREE_CHAIN (last_function_parms);
}
if (old_decl && DECL_ARTIFICIAL (old_decl))
error ("definition of implicitly-declared `%D'", old_decl);
if (old_decl)
{
/* Since we've smashed OLD_DECL to its
DECL_TEMPLATE_RESULT, we must do the same to DECL. */
if (TREE_CODE (decl) == TEMPLATE_DECL)
decl = DECL_TEMPLATE_RESULT (decl);
/* Attempt to merge the declarations. This can fail, in
the case of some illegal specialization declarations. */
if (!duplicate_decls (decl, old_decl))
error ("no `%#D' member function declared in class `%T'",
decl, ctype);
return old_decl;
}
}
if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
return NULL_TREE;
if (ctype == NULL_TREE || check)
return decl;
if (virtualp)
DECL_VIRTUAL_P (decl) = 1;
return decl;
}
static tree
grokvardecl (type, declarator, specbits_in, initialized, constp, in_namespace)
tree type;
tree declarator;
RID_BIT_TYPE *specbits_in;
int initialized;
int constp;
tree in_namespace;
{
tree decl;
RID_BIT_TYPE specbits;
specbits = *specbits_in;
if (TREE_CODE (type) == OFFSET_TYPE)
{
/* If you declare a static member so that it
can be initialized, the code will reach here. */
tree basetype = TYPE_OFFSET_BASETYPE (type);
type = TREE_TYPE (type);
decl = build_lang_decl (VAR_DECL, declarator, type);
DECL_CONTEXT (decl) = basetype;
}
else
{
tree context;
if (in_namespace)
context = in_namespace;
else if (namespace_bindings_p () || RIDBIT_SETP (RID_EXTERN, specbits))
context = current_namespace;
else
context = NULL_TREE;
/* For namespace-scope variables, declared in a template, we
need the full lang_decl. The same is true for
namespace-scope variables that do not have C++ language
linkage. */
if (context
&& (processing_template_decl
|| current_lang_name != lang_name_cplusplus))
decl = build_lang_decl (VAR_DECL, declarator, type);
else
decl = build_decl (VAR_DECL, declarator, type);
if (context)
set_decl_namespace (decl, context, 0);
context = DECL_CONTEXT (decl);
if (declarator && context && current_lang_name != lang_name_c)
/* We can't mangle lazily here because we don't have any
way to recover whether or not a variable was `extern
"C"' later. */
mangle_decl (decl);
}
if (in_namespace)
set_decl_namespace (decl, in_namespace, 0);
if (RIDBIT_SETP (RID_EXTERN, specbits))
{
DECL_THIS_EXTERN (decl) = 1;
DECL_EXTERNAL (decl) = !initialized;
}
/* In class context, static means one per class,
public access, and static storage. */
if (DECL_CLASS_SCOPE_P (decl))
{
TREE_PUBLIC (decl) = 1;
TREE_STATIC (decl) = 1;
DECL_EXTERNAL (decl) = 0;
}
/* At top level, either `static' or no s.c. makes a definition
(perhaps tentative), and absence of `static' makes it public. */
else if (toplevel_bindings_p ())
{
TREE_PUBLIC (decl) = (RIDBIT_NOTSETP (RID_STATIC, specbits)
&& (DECL_THIS_EXTERN (decl) || ! constp));
TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
}
/* Not at top level, only `static' makes a static definition. */
else
{
TREE_STATIC (decl) = !! RIDBIT_SETP (RID_STATIC, specbits);
TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
}
if (TREE_PUBLIC (decl))
{
/* [basic.link]: A name with no linkage (notably, the name of a class
or enumeration declared in a local scope) shall not be used to
declare an entity with linkage.
Only check this for public decls for now. */
tree t = no_linkage_check (TREE_TYPE (decl));
if (t)
{
if (TYPE_ANONYMOUS_P (t))
/* Ignore for now; `enum { foo } e' is pretty common. */;
else
pedwarn ("non-local variable `%#D' uses local type `%T'",
decl, t);
}
}
return decl;
}
/* Create and return a canonical pointer to member function type, for
TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
tree
build_ptrmemfunc_type (type)
tree type;
{
tree fields[4];
tree t;
tree unqualified_variant = NULL_TREE;
if (type == error_mark_node)
return type;
/* If a canonical type already exists for this type, use it. We use
this method instead of type_hash_canon, because it only does a
simple equality check on the list of field members. */
if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
return t;
/* Make sure that we always have the unqualified pointer-to-member
type first. */
if (cp_type_quals (type) != TYPE_UNQUALIFIED)
unqualified_variant
= build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
t = make_aggr_type (RECORD_TYPE);
/* Let the front-end know this is a pointer to member function... */
TYPE_PTRMEMFUNC_FLAG (t) = 1;
/* ... and not really an aggregate. */
SET_IS_AGGR_TYPE (t, 0);
fields[0] = build_decl (FIELD_DECL, pfn_identifier, type);
fields[1] = build_decl (FIELD_DECL, delta_identifier,
delta_type_node);
finish_builtin_type (t, "__ptrmemfunc_type", fields, 1, ptr_type_node);
/* Zap out the name so that the back-end will give us the debugging
information for this anonymous RECORD_TYPE. */
TYPE_NAME (t) = NULL_TREE;
/* If this is not the unqualified form of this pointer-to-member
type, set the TYPE_MAIN_VARIANT for this type to be the
unqualified type. Since they are actually RECORD_TYPEs that are
not variants of each other, we must do this manually. */
if (cp_type_quals (type) != TYPE_UNQUALIFIED)
{
t = build_qualified_type (t, cp_type_quals (type));
TYPE_MAIN_VARIANT (t) = unqualified_variant;
TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
TYPE_NEXT_VARIANT (unqualified_variant) = t;
}
/* Cache this pointer-to-member type so that we can find it again
later. */
TYPE_SET_PTRMEMFUNC_TYPE (type, t);
/* Seems to be wanted. */
CLASSTYPE_GOT_SEMICOLON (t) = 1;
return t;
}
/* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
Check to see that the definition is valid. Issue appropriate error
messages. Return 1 if the definition is particularly bad, or 0
otherwise. */
int
check_static_variable_definition (decl, type)
tree decl;
tree type;
{
/* Motion 10 at San Diego: If a static const integral data member is
initialized with an integral constant expression, the initializer
may appear either in the declaration (within the class), or in
the definition, but not both. If it appears in the class, the
member is a member constant. The file-scope definition is always
required. */
if (CLASS_TYPE_P (type) || TREE_CODE (type) == REFERENCE_TYPE)
{
error ("invalid in-class initialization of static data member of non-integral type `%T'",
type);
/* If we just return the declaration, crashes will sometimes
occur. We therefore return void_type_node, as if this was a
friend declaration, to cause callers to completely ignore
this declaration. */
return 1;
}
else if (!CP_TYPE_CONST_P (type))
error ("ISO C++ forbids in-class initialization of non-const static member `%D'",
decl);
else if (pedantic && !INTEGRAL_TYPE_P (type))
pedwarn ("ISO C++ forbids initialization of member constant `%D' of non-integral type `%T'", decl, type);
return 0;
}
/* Given the SIZE (i.e., number of elements) in an array, compute an
appropriate index type for the array. If non-NULL, NAME is the
name of the thing being declared. */
tree
compute_array_index_type (name, size)
tree name;
tree size;
{
tree itype;
/* If this involves a template parameter, it will be a constant at
instantiation time, but we don't know what the value is yet.
Even if no template parameters are involved, we may an expression
that is not a constant; we don't even simplify `1 + 2' when
processing a template. */
if (processing_template_decl)
{
/* Resolve a qualified reference to an enumerator or static
const data member of ours. */
if (TREE_CODE (size) == SCOPE_REF
&& TREE_OPERAND (size, 0) == current_class_type)
{
tree t = lookup_field (current_class_type,
TREE_OPERAND (size, 1), 0, 0);
if (t)
size = t;
}
return build_index_type (build_min (MINUS_EXPR, sizetype,
size, integer_one_node));
}
/* The size might be the result of a cast. */
STRIP_TYPE_NOPS (size);
/* It might be a const variable or enumeration constant. */
size = decl_constant_value (size);
/* The array bound must be an integer type. */
if (TREE_CODE (TREE_TYPE (size)) != INTEGER_TYPE
&& TREE_CODE (TREE_TYPE (size)) != ENUMERAL_TYPE
&& TREE_CODE (TREE_TYPE (size)) != BOOLEAN_TYPE)
{
if (name)
error ("size of array `%D' has non-integer type", name);
else
error ("size of array has non-integer type");
size = integer_one_node;
}
/* Normally, the array-bound will be a constant. */
if (TREE_CODE (size) == INTEGER_CST)
{
/* Check to see if the array bound overflowed. Make that an
error, no matter how generous we're being. */
int old_flag_pedantic_errors = flag_pedantic_errors;
int old_pedantic = pedantic;
pedantic = flag_pedantic_errors = 1;
constant_expression_warning (size);
pedantic = old_pedantic;
flag_pedantic_errors = old_flag_pedantic_errors;
/* An array must have a positive number of elements. */
if (INT_CST_LT (size, integer_zero_node))
{
if (name)
error ("size of array `%D' is negative", name);
else
error ("size of array is negative");
size = integer_one_node;
}
/* Except that an extension we allow zero-sized arrays. We
always allow them in system headers because glibc uses
them. */
else if (integer_zerop (size) && pedantic && !in_system_header)
{
if (name)
pedwarn ("ISO C++ forbids zero-size array `%D'", name);
else
pedwarn ("ISO C++ forbids zero-size array");
}
}
else if (TREE_CONSTANT (size))
{
/* `(int) &fn' is not a valid array bound. */
if (name)
error ("size of array `%D' is not an integral constant-expression",
name);
else
error ("size of array is not an integral constant-expression");
}
/* Compute the index of the largest element in the array. It is
one less than the number of elements in the array. */
itype
= fold (cp_build_binary_op (MINUS_EXPR,
cp_convert (ssizetype, size),
cp_convert (ssizetype,
integer_one_node)));
/* Check for variable-sized arrays. We allow such things as an
extension, even though they are not allowed in ANSI/ISO C++. */
if (!TREE_CONSTANT (itype))
{
if (pedantic)
{
if (name)
pedwarn ("ISO C++ forbids variable-size array `%D'",
name);
else
pedwarn ("ISO C++ forbids variable-size array");
}
/* Create a variable-sized array index type. */
itype = variable_size (itype);
}
/* Make sure that there was no overflow when creating to a signed
index type. (For example, on a 32-bit machine, an array with
size 2^32 - 1 is too big.) */
else if (TREE_OVERFLOW (itype))
{
error ("overflow in array dimension");
TREE_OVERFLOW (itype) = 0;
}
/* Create and return the appropriate index type. */
return build_index_type (itype);
}
/* Returns an ARRAY_TYPE for an array with SIZE elements of the
indicated TYPE. If non-NULL, NAME is the NAME of the declaration
with this type. */
static tree
create_array_type_for_decl (name, type, size)
tree name;
tree type;
tree size;
{
tree itype = NULL_TREE;
const char* error_msg;
/* If things have already gone awry, bail now. */
if (type == error_mark_node || size == error_mark_node)
return error_mark_node;
/* Assume that everything will go OK. */
error_msg = NULL;
/* There are some types which cannot be array elements. */
switch (TREE_CODE (type))
{
case VOID_TYPE:
error_msg = "array of void";
break;
case FUNCTION_TYPE:
error_msg = "array of functions";
break;
case REFERENCE_TYPE:
error_msg = "array of references";
break;
case OFFSET_TYPE:
error_msg = "array of data members";
break;
case METHOD_TYPE:
error_msg = "array of function members";
break;
default:
break;
}
/* If something went wrong, issue an error-message and return. */
if (error_msg)
{
if (name)
error ("declaration of `%D' as %s", name, error_msg);
else
error ("creating %s", error_msg);
return error_mark_node;
}
/* [dcl.array]
The constant expressions that specify the bounds of the arrays
can be omitted only for the first member of the sequence. */
if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
{
if (name)
error ("declaration of `%D' as multidimensional array must have bounds for all dimensions except the first",
name);
else
error ("multidimensional array must have bounds for all dimensions except the first");
return error_mark_node;
}
/* Figure out the index type for the array. */
if (size)
itype = compute_array_index_type (name, size);
return build_cplus_array_type (type, itype);
}
/* Check that it's OK to declare a function with the indicated TYPE.
SFK indicates the kind of special function (if any) that this
function is. OPTYPE is the type given in a conversion operator
declaration. Returns the actual return type of the function; that
may be different than TYPE if an error occurs, or for certain
special functions. */
static tree
check_special_function_return_type (sfk, type, optype)
special_function_kind sfk;
tree type;
tree optype;
{
switch (sfk)
{
case sfk_constructor:
if (type)
error ("return type specification for constructor invalid");
type = void_type_node;
break;
case sfk_destructor:
if (type)
error ("return type specification for destructor invalid");
type = void_type_node;
break;
case sfk_conversion:
if (type && !same_type_p (type, optype))
error ("operator `%T' declared to return `%T'", optype, type);
else if (type)
pedwarn ("return type specified for `operator %T'", optype);
type = optype;
break;
default:
my_friendly_abort (20000408);
break;
}
return type;
}
/* Given declspecs and a declarator,
determine the name and type of the object declared
and construct a ..._DECL node for it.
(In one case we can return a ..._TYPE node instead.
For invalid input we sometimes return 0.)
DECLSPECS is a chain of tree_list nodes whose value fields
are the storage classes and type specifiers.
DECL_CONTEXT says which syntactic context this declaration is in:
NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
FUNCDEF for a function definition. Like NORMAL but a few different
error messages in each case. Return value may be zero meaning
this definition is too screwy to try to parse.
MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
handle member functions (which have FIELD context).
Return value may be zero meaning this definition is too screwy to
try to parse.
PARM for a parameter declaration (either within a function prototype
or before a function body). Make a PARM_DECL, or return void_type_node.
CATCHPARM for a parameter declaration before a catch clause.
TYPENAME if for a typename (in a cast or sizeof).
Don't make a DECL node; just return the ..._TYPE node.
FIELD for a struct or union field; make a FIELD_DECL.
BITFIELD for a field with specified width.
INITIALIZED is 1 if the decl has an initializer.
ATTRLIST is a pointer to the list of attributes, which may be NULL
if there are none; *ATTRLIST may be modified if attributes from inside
the declarator should be applied to the declaration.
In the TYPENAME case, DECLARATOR is really an abstract declarator.
It may also be so in the PARM case, for a prototype where the
argument type is specified but not the name.
This function is where the complicated C meanings of `static'
and `extern' are interpreted.
For C++, if there is any monkey business to do, the function which
calls this one must do it, i.e., prepending instance variables,
renaming overloaded function names, etc.
Note that for this C++, it is an error to define a method within a class
which does not belong to that class.
Except in the case where SCOPE_REFs are implicitly known (such as
methods within a class being redundantly qualified),
declarations which involve SCOPE_REFs are returned as SCOPE_REFs
(class_name::decl_name). The caller must also deal with this.
If a constructor or destructor is seen, and the context is FIELD,
then the type gains the attribute TREE_HAS_x. If such a declaration
is erroneous, NULL_TREE is returned.
QUALS is used only for FUNCDEF and MEMFUNCDEF cases. For a member
function, these are the qualifiers to give to the `this' pointer. We
apply TYPE_QUAL_RESTRICT to the this ptr, not the object.
May return void_type_node if the declarator turned out to be a friend.
See grokfield for details. */
tree
grokdeclarator (declarator, declspecs, decl_context, initialized, attrlist)
tree declspecs;
tree declarator;
enum decl_context decl_context;
int initialized;
tree *attrlist;
{
RID_BIT_TYPE specbits;
int nclasses = 0;
tree spec;
tree type = NULL_TREE;
int longlong = 0;
int constp;
int restrictp;
int volatilep;
int type_quals;
int virtualp, explicitp, friendp, inlinep, staticp;
int explicit_int = 0;
int explicit_char = 0;
int defaulted_int = 0;
int extern_langp = 0;
tree typedef_decl = NULL_TREE;
const char *name;
tree typedef_type = NULL_TREE;
int funcdef_flag = 0;
enum tree_code innermost_code = ERROR_MARK;
int bitfield = 0;
#if 0
/* See the code below that used this. */
tree decl_attr = NULL_TREE;
#endif
/* Set this to error_mark_node for FIELD_DECLs we could not handle properly.
All FIELD_DECLs we build here have `init' put into their DECL_INITIAL. */
tree init = NULL_TREE;
/* Keep track of what sort of function is being processed
so that we can warn about default return values, or explicit
return values which do not match prescribed defaults. */
special_function_kind sfk = sfk_none;
tree dname = NULL_TREE;
tree ctype = current_class_type;
tree ctor_return_type = NULL_TREE;
enum overload_flags flags = NO_SPECIAL;
tree quals = NULL_TREE;
tree raises = NULL_TREE;
int template_count = 0;
tree in_namespace = NULL_TREE;
tree returned_attrs = NULL_TREE;
RIDBIT_RESET_ALL (specbits);
if (decl_context == FUNCDEF)
funcdef_flag = 1, decl_context = NORMAL;
else if (decl_context == MEMFUNCDEF)
funcdef_flag = -1, decl_context = FIELD;
else if (decl_context == BITFIELD)
bitfield = 1, decl_context = FIELD;
/* Look inside a declarator for the name being declared
and get it as a string, for an error message. */
{
tree *next = &declarator;
register tree decl;
name = NULL;
while (next && *next)
{
decl = *next;
switch (TREE_CODE (decl))
{
case TREE_LIST:
/* For attributes. */
next = &TREE_VALUE (decl);
break;
case COND_EXPR:
ctype = NULL_TREE;
next = &TREE_OPERAND (decl, 0);
break;
case BIT_NOT_EXPR: /* For C++ destructors! */
{
tree name = TREE_OPERAND (decl, 0);
tree rename = NULL_TREE;
my_friendly_assert (flags == NO_SPECIAL, 152);
flags = DTOR_FLAG;
sfk = sfk_destructor;
if (TREE_CODE (name) == TYPE_DECL)
TREE_OPERAND (decl, 0) = name = constructor_name (name);
my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, 153);
if (ctype == NULL_TREE)
{
if (current_class_type == NULL_TREE)
{
error ("destructors must be member functions");
flags = NO_SPECIAL;
}
else
{
tree t = constructor_name (current_class_name);
if (t != name)
rename = t;
}
}
else
{
tree t = constructor_name (ctype);
if (t != name)
rename = t;
}
if (rename)
{
error ("destructor `%T' must match class name `%T'",
name, rename);
TREE_OPERAND (decl, 0) = rename;
}
next = &name;
}
break;
case ADDR_EXPR: /* C++ reference declaration */
/* Fall through. */
case ARRAY_REF:
case INDIRECT_REF:
ctype = NULL_TREE;
innermost_code = TREE_CODE (decl);
next = &TREE_OPERAND (decl, 0);
break;
case CALL_EXPR:
if (parmlist_is_exprlist (CALL_DECLARATOR_PARMS (decl)))
{
/* This is actually a variable declaration using
constructor syntax. We need to call start_decl and
cp_finish_decl so we can get the variable
initialized... */
tree attributes;
*next = TREE_OPERAND (decl, 0);
init = CALL_DECLARATOR_PARMS (decl);
if (attrlist)
{
attributes = *attrlist;
}
else
{
attributes = NULL_TREE;
}
decl = start_decl (declarator, declspecs, 1,
attributes, NULL_TREE);
decl_type_access_control (decl);
if (decl)
{
/* Look for __unused__ attribute */
if (TREE_USED (TREE_TYPE (decl)))
TREE_USED (decl) = 1;
finish_decl (decl, init, NULL_TREE);
}
else
error ("invalid declarator");
return 0;
}
innermost_code = TREE_CODE (decl);
if (decl_context == FIELD && ctype == NULL_TREE)
ctype = current_class_type;
if (ctype
&& TREE_OPERAND (decl, 0)
&& (TREE_CODE (TREE_OPERAND (decl, 0)) == TYPE_DECL
&& ((DECL_NAME (TREE_OPERAND (decl, 0))
== constructor_name_full (ctype))
|| (DECL_NAME (TREE_OPERAND (decl, 0))
== constructor_name (ctype)))))
TREE_OPERAND (decl, 0) = constructor_name (ctype);
next = &TREE_OPERAND (decl, 0);
decl = *next;
if (ctype != NULL_TREE
&& decl != NULL_TREE && flags != DTOR_FLAG
&& decl == constructor_name (ctype))
{
sfk = sfk_constructor;
ctor_return_type = ctype;
}
ctype = NULL_TREE;
break;
case TEMPLATE_ID_EXPR:
{
tree fns = TREE_OPERAND (decl, 0);
if (TREE_CODE (fns) == LOOKUP_EXPR)
fns = TREE_OPERAND (fns, 0);
dname = fns;
if (TREE_CODE (dname) == COMPONENT_REF)
dname = TREE_OPERAND (dname, 1);
if (TREE_CODE (dname) != IDENTIFIER_NODE)
{
my_friendly_assert (is_overloaded_fn (dname),
19990331);
dname = DECL_NAME (get_first_fn (dname));
}
}
/* Fall through. */
case IDENTIFIER_NODE:
if (TREE_CODE (decl) == IDENTIFIER_NODE)
dname = decl;
next = 0;
if (C_IS_RESERVED_WORD (dname))
{
error ("declarator-id missing; using reserved word `%D'",
dname);
name = IDENTIFIER_POINTER (dname);
}
else if (!IDENTIFIER_TYPENAME_P (dname))
name = IDENTIFIER_POINTER (dname);
else
{
my_friendly_assert (flags == NO_SPECIAL, 154);
flags = TYPENAME_FLAG;
ctor_return_type = TREE_TYPE (dname);
sfk = sfk_conversion;
if (IDENTIFIER_GLOBAL_VALUE (dname)
&& (TREE_CODE (IDENTIFIER_GLOBAL_VALUE (dname))
== TYPE_DECL))
name = IDENTIFIER_POINTER (dname);
else
name = "<invalid operator>";
}
break;
/* C++ extension */
case SCOPE_REF:
{
/* Perform error checking, and decide on a ctype. */
tree cname = TREE_OPERAND (decl, 0);
if (cname == NULL_TREE)
ctype = NULL_TREE;
else if (TREE_CODE (cname) == NAMESPACE_DECL)
{
ctype = NULL_TREE;
in_namespace = TREE_OPERAND (decl, 0);
TREE_OPERAND (decl, 0) = NULL_TREE;
}
else if (! is_aggr_type (cname, 1))
TREE_OPERAND (decl, 0) = NULL_TREE;
/* Must test TREE_OPERAND (decl, 1), in case user gives
us `typedef (class::memfunc)(int); memfunc *memfuncptr;' */
else if (TREE_OPERAND (decl, 1)
&& TREE_CODE (TREE_OPERAND (decl, 1)) == INDIRECT_REF)
ctype = cname;
else if (TREE_CODE (cname) == TEMPLATE_TYPE_PARM
|| TREE_CODE (cname) == BOUND_TEMPLATE_TEMPLATE_PARM)
{
error ("`%T::%D' is not a valid declarator", cname,
TREE_OPERAND (decl, 1));
error (" perhaps you want `typename %T::%D' to make it a type",
cname, TREE_OPERAND (decl, 1));
return void_type_node;
}
else if (ctype == NULL_TREE)
ctype = cname;
else if (TREE_COMPLEXITY (decl) == current_class_depth)
TREE_OPERAND (decl, 0) = ctype;
else
{
if (! UNIQUELY_DERIVED_FROM_P (cname, ctype))
{
error ("type `%T' is not derived from type `%T'",
cname, ctype);
TREE_OPERAND (decl, 0) = NULL_TREE;
}
else
ctype = cname;
}
if (ctype && TREE_CODE (TREE_OPERAND (decl, 1)) == TYPE_DECL
&& ((DECL_NAME (TREE_OPERAND (decl, 1))
== constructor_name_full (ctype))
|| (DECL_NAME (TREE_OPERAND (decl, 1))
== constructor_name (ctype))))
TREE_OPERAND (decl, 1) = constructor_name (ctype);
next = &TREE_OPERAND (decl, 1);
decl = *next;
if (ctype)
{
if (TREE_CODE (decl) == IDENTIFIER_NODE
&& constructor_name (ctype) == decl)
{
sfk = sfk_constructor;
ctor_return_type = ctype;
}
else if (TREE_CODE (decl) == BIT_NOT_EXPR
&& TREE_CODE (TREE_OPERAND (decl, 0)) == IDENTIFIER_NODE
&& (constructor_name (ctype) == TREE_OPERAND (decl, 0)
|| constructor_name_full (ctype) == TREE_OPERAND (decl, 0)))
{
sfk = sfk_destructor;
ctor_return_type = ctype;
flags = DTOR_FLAG;
TREE_OPERAND (decl, 0) = constructor_name (ctype);
next = &TREE_OPERAND (decl, 0);
}
}
}
break;
case ERROR_MARK:
next = 0;
break;
case TYPE_DECL:
/* Parse error puts this typespec where
a declarator should go. */
error ("`%T' specified as declarator-id", DECL_NAME (decl));
if (TREE_TYPE (decl) == current_class_type)
error (" perhaps you want `%T' for a constructor",
current_class_name);
dname = DECL_NAME (decl);
name = IDENTIFIER_POINTER (dname);
/* Avoid giving two errors for this. */
IDENTIFIER_CLASS_VALUE (dname) = NULL_TREE;
declspecs = tree_cons (NULL_TREE, integer_type_node, declspecs);
*next = dname;
next = 0;
break;
default:
internal_error ("`%D' as declarator", decl);
}
}
}
/* A function definition's declarator must have the form of
a function declarator. */
if (funcdef_flag && innermost_code != CALL_EXPR)
return 0;
if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
&& innermost_code != CALL_EXPR
&& ! (ctype && declspecs == NULL_TREE))
{
error ("declaration of `%D' as non-function", dname);
return void_type_node;
}
/* Anything declared one level down from the top level
must be one of the parameters of a function
(because the body is at least two levels down). */
/* This heuristic cannot be applied to C++ nodes! Fixed, however,
by not allowing C++ class definitions to specify their parameters
with xdecls (must be spec.d in the parmlist).
Since we now wait to push a class scope until we are sure that
we are in a legitimate method context, we must set oldcname
explicitly (since current_class_name is not yet alive).
We also want to avoid calling this a PARM if it is in a namespace. */
if (decl_context == NORMAL && !toplevel_bindings_p ())
{
struct binding_level *b = current_binding_level;
current_binding_level = b->level_chain;
if (current_binding_level != 0 && toplevel_bindings_p ())
decl_context = PARM;
current_binding_level = b;
}
if (name == NULL)
name = decl_context == PARM ? "parameter" : "type name";
/* Look through the decl specs and record which ones appear.
Some typespecs are defined as built-in typenames.
Others, the ones that are modifiers of other types,
are represented by bits in SPECBITS: set the bits for
the modifiers that appear. Storage class keywords are also in SPECBITS.
If there is a typedef name or a type, store the type in TYPE.
This includes builtin typedefs such as `int'.
Set EXPLICIT_INT if the type is `int' or `char' and did not
come from a user typedef.
Set LONGLONG if `long' is mentioned twice.
For C++, constructors and destructors have their own fast treatment. */
for (spec = declspecs; spec; spec = TREE_CHAIN (spec))
{
register int i;
register tree id;
/* Certain parse errors slip through. For example,
`int class;' is not caught by the parser. Try
weakly to recover here. */
if (TREE_CODE (spec) != TREE_LIST)
return 0;
id = TREE_VALUE (spec);
if (TREE_CODE (id) == IDENTIFIER_NODE)
{
if (id == ridpointers[(int) RID_INT]
|| id == ridpointers[(int) RID_CHAR]
|| id == ridpointers[(int) RID_BOOL]
|| id == ridpointers[(int) RID_WCHAR])
{
if (type)
{
if (id == ridpointers[(int) RID_BOOL])
error ("`bool' is now a keyword");
else
error ("extraneous `%T' ignored", id);
}
else
{
if (id == ridpointers[(int) RID_INT])
explicit_int = 1;
else if (id == ridpointers[(int) RID_CHAR])
explicit_char = 1;
type = TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (id));
}
goto found;
}
/* C++ aggregate types. */
if (IDENTIFIER_HAS_TYPE_VALUE (id))
{
if (type)
error ("multiple declarations `%T' and `%T'", type, id);
else
type = IDENTIFIER_TYPE_VALUE (id);
goto found;
}
for (i = (int) RID_FIRST_MODIFIER; i <= (int) RID_LAST_MODIFIER; i++)
{
if (ridpointers[i] == id)
{
if (i == (int) RID_LONG && RIDBIT_SETP (i, specbits))
{
if (pedantic && ! in_system_header && warn_long_long)
pedwarn ("ISO C++ does not support `long long'");
if (longlong)
error ("`long long long' is too long for GCC");
else
longlong = 1;
}
else if (RIDBIT_SETP (i, specbits))
pedwarn ("duplicate `%s'", IDENTIFIER_POINTER (id));
if (i == (int)RID_EXTERN
&& TREE_PURPOSE (spec) == error_mark_node)
/* This extern was part of a language linkage. */
extern_langp = 1;
RIDBIT_SET (i, specbits);
goto found;
}
}
}
/* C++ aggregate types. */
else if (TREE_CODE (id) == TYPE_DECL)
{
if (type)
error ("multiple declarations `%T' and `%T'", type,
TREE_TYPE (id));
else
{
type = TREE_TYPE (id);
TREE_VALUE (spec) = type;
}
goto found;
}
if (type)
error ("two or more data types in declaration of `%s'", name);
else if (TREE_CODE (id) == IDENTIFIER_NODE)
{
register tree t = lookup_name (id, 1);
if (!t || TREE_CODE (t) != TYPE_DECL)
error ("`%s' fails to be a typedef or built in type",
IDENTIFIER_POINTER (id));
else
{
type = TREE_TYPE (t);
#if 0
/* See the code below that used this. */
decl_attr = DECL_ATTRIBUTES (id);
#endif
typedef_decl = t;
}
}
else if (id != error_mark_node)
/* Can't change CLASS nodes into RECORD nodes here! */
type = id;
found: ;
}
typedef_type = type;
/* No type at all: default to `int', and set DEFAULTED_INT
because it was not a user-defined typedef. */
if (type == NULL_TREE
&& (RIDBIT_SETP (RID_SIGNED, specbits)
|| RIDBIT_SETP (RID_UNSIGNED, specbits)
|| RIDBIT_SETP (RID_LONG, specbits)
|| RIDBIT_SETP (RID_SHORT, specbits)))
{
/* These imply 'int'. */
type = integer_type_node;
defaulted_int = 1;
}
if (sfk != sfk_none)
type = check_special_function_return_type (sfk, type,
ctor_return_type);
else if (type == NULL_TREE)
{
int is_main;
explicit_int = -1;
/* We handle `main' specially here, because 'main () { }' is so
common. With no options, it is allowed. With -Wreturn-type,
it is a warning. It is only an error with -pedantic-errors. */
is_main = (funcdef_flag
&& MAIN_NAME_P (dname)
&& ctype == NULL_TREE
&& in_namespace == NULL_TREE
&& current_namespace == global_namespace);
if (in_system_header || flag_ms_extensions)
/* Allow it, sigh. */;
else if (pedantic || ! is_main)
pedwarn ("ISO C++ forbids declaration of `%s' with no type",
name);
else if (warn_return_type)
warning ("ISO C++ forbids declaration of `%s' with no type",
name);
type = integer_type_node;
}
if (type && TREE_CODE (type) == TYPENAME_TYPE && TREE_TYPE (type))
{
/* The implicit typename extension is deprecated and will be
removed. Warn about its use now. */
warning ("`%T' is implicitly a typename", type);
cp_deprecated ("implicit typename");
/* Now remove its implicitness, so that we don't warn again.
For instance this might be a typedef, and we do not want to
warn on uses of the typedef itself. Simply clearing the
TREE_TYPE is insufficient. */
type = copy_node (type);
TREE_TYPE (type) = NULL_TREE;
}
ctype = NULL_TREE;
/* Now process the modifiers that were specified
and check for invalid combinations. */
/* Long double is a special combination. */
if (RIDBIT_SETP (RID_LONG, specbits)
&& TYPE_MAIN_VARIANT (type) == double_type_node)
{
RIDBIT_RESET (RID_LONG, specbits);
type = build_qualified_type (long_double_type_node,
cp_type_quals (type));
}
/* Check all other uses of type modifiers. */
if (RIDBIT_SETP (RID_UNSIGNED, specbits)
|| RIDBIT_SETP (RID_SIGNED, specbits)
|| RIDBIT_SETP (RID_LONG, specbits)
|| RIDBIT_SETP (RID_SHORT, specbits))
{
int ok = 0;
if (TREE_CODE (type) == REAL_TYPE)
error ("short, signed or unsigned invalid for `%s'", name);
else if (TREE_CODE (type) != INTEGER_TYPE)
error ("long, short, signed or unsigned invalid for `%s'", name);
else if (RIDBIT_SETP (RID_LONG, specbits)
&& RIDBIT_SETP (RID_SHORT, specbits))
error ("long and short specified together for `%s'", name);
else if ((RIDBIT_SETP (RID_LONG, specbits)
|| RIDBIT_SETP (RID_SHORT, specbits))
&& explicit_char)
error ("long or short specified with char for `%s'", name);
else if ((RIDBIT_SETP (RID_LONG, specbits)
|| RIDBIT_SETP (RID_SHORT, specbits))
&& TREE_CODE (type) == REAL_TYPE)
error ("long or short specified with floating type for `%s'", name);
else if (RIDBIT_SETP (RID_SIGNED, specbits)
&& RIDBIT_SETP (RID_UNSIGNED, specbits))
error ("signed and unsigned given together for `%s'", name);
else
{
ok = 1;
if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
{
pedwarn ("long, short, signed or unsigned used invalidly for `%s'",
name);
if (flag_pedantic_errors)
ok = 0;
}
}
/* Discard the type modifiers if they are invalid. */
if (! ok)
{
RIDBIT_RESET (RID_UNSIGNED, specbits);
RIDBIT_RESET (RID_SIGNED, specbits);
RIDBIT_RESET (RID_LONG, specbits);
RIDBIT_RESET (RID_SHORT, specbits);
longlong = 0;
}
}
if (RIDBIT_SETP (RID_COMPLEX, specbits)
&& TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
{
error ("complex invalid for `%s'", name);
RIDBIT_RESET (RID_COMPLEX, specbits);
}
/* Decide whether an integer type is signed or not.
Optionally treat bitfields as signed by default. */
if (RIDBIT_SETP (RID_UNSIGNED, specbits)
/* [class.bit]
It is implementation-defined whether a plain (neither
explicitly signed or unsigned) char, short, int, or long
bit-field is signed or unsigned.
Naturally, we extend this to long long as well. Note that
this does not include wchar_t. */
|| (bitfield && !flag_signed_bitfields
&& RIDBIT_NOTSETP (RID_SIGNED, specbits)
/* A typedef for plain `int' without `signed' can be
controlled just like plain `int', but a typedef for
`signed int' cannot be so controlled. */
&& !(typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
&& (TREE_CODE (type) == INTEGER_TYPE
|| TREE_CODE (type) == CHAR_TYPE)
&& !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
{
if (longlong)
type = long_long_unsigned_type_node;
else if (RIDBIT_SETP (RID_LONG, specbits))
type = long_unsigned_type_node;
else if (RIDBIT_SETP (RID_SHORT, specbits))
type = short_unsigned_type_node;
else if (type == char_type_node)
type = unsigned_char_type_node;
else if (typedef_decl)
type = unsigned_type (type);
else
type = unsigned_type_node;
}
else if (RIDBIT_SETP (RID_SIGNED, specbits)
&& type == char_type_node)
type = signed_char_type_node;
else if (longlong)
type = long_long_integer_type_node;
else if (RIDBIT_SETP (RID_LONG, specbits))
type = long_integer_type_node;
else if (RIDBIT_SETP (RID_SHORT, specbits))
type = short_integer_type_node;
if (RIDBIT_SETP (RID_COMPLEX, specbits))
{
/* If we just have "complex", it is equivalent to
"complex double", but if any modifiers at all are specified it is
the complex form of TYPE. E.g, "complex short" is
"complex short int". */
if (defaulted_int && ! longlong
&& ! (RIDBIT_SETP (RID_LONG, specbits)
|| RIDBIT_SETP (RID_SHORT, specbits)
|| RIDBIT_SETP (RID_SIGNED, specbits)
|| RIDBIT_SETP (RID_UNSIGNED, specbits)))
type = complex_double_type_node;
else if (type == integer_type_node)
type = complex_integer_type_node;
else if (type == float_type_node)
type = complex_float_type_node;
else if (type == double_type_node)
type = complex_double_type_node;
else if (type == long_double_type_node)
type = complex_long_double_type_node;
else
type = build_complex_type (type);
}
if (sfk == sfk_conversion
&& (RIDBIT_SETP (RID_CONST, specbits)
|| RIDBIT_SETP (RID_VOLATILE, specbits)
|| RIDBIT_SETP (RID_RESTRICT, specbits)))
error ("qualifiers are not allowed on declaration of `operator %T'",
ctor_return_type);
/* Set CONSTP if this declaration is `const', whether by
explicit specification or via a typedef.
Likewise for VOLATILEP. */
constp = !! RIDBIT_SETP (RID_CONST, specbits) + CP_TYPE_CONST_P (type);
restrictp =
!! RIDBIT_SETP (RID_RESTRICT, specbits) + CP_TYPE_RESTRICT_P (type);
volatilep =
!! RIDBIT_SETP (RID_VOLATILE, specbits) + CP_TYPE_VOLATILE_P (type);
type_quals = ((constp ? TYPE_QUAL_CONST : 0)
| (restrictp ? TYPE_QUAL_RESTRICT : 0)
| (volatilep ? TYPE_QUAL_VOLATILE : 0));
type = cp_build_qualified_type (type, type_quals);
staticp = 0;
inlinep = !! RIDBIT_SETP (RID_INLINE, specbits);
virtualp = RIDBIT_SETP (RID_VIRTUAL, specbits);
RIDBIT_RESET (RID_VIRTUAL, specbits);
explicitp = RIDBIT_SETP (RID_EXPLICIT, specbits) != 0;
RIDBIT_RESET (RID_EXPLICIT, specbits);
if (RIDBIT_SETP (RID_STATIC, specbits))
staticp = 1 + (decl_context == FIELD);
if (virtualp && staticp == 2)
{
error ("member `%D' cannot be declared both virtual and static",
dname);
staticp = 0;
}
friendp = RIDBIT_SETP (RID_FRIEND, specbits);
RIDBIT_RESET (RID_FRIEND, specbits);
/* Warn if two storage classes are given. Default to `auto'. */
if (RIDBIT_ANY_SET (specbits))
{
if (RIDBIT_SETP (RID_STATIC, specbits)) nclasses++;
if (RIDBIT_SETP (RID_EXTERN, specbits) && !extern_langp) nclasses++;
if (decl_context == PARM && nclasses > 0)
error ("storage class specifiers invalid in parameter declarations");
if (RIDBIT_SETP (RID_TYPEDEF, specbits))
{
if (decl_context == PARM)
error ("typedef declaration invalid in parameter declaration");
nclasses++;
}
if (RIDBIT_SETP (RID_AUTO, specbits)) nclasses++;
if (RIDBIT_SETP (RID_REGISTER, specbits)) nclasses++;
if (!nclasses && !friendp && extern_langp)
nclasses++;
}
/* Give error if `virtual' is used outside of class declaration. */
if (virtualp
&& (current_class_name == NULL_TREE || decl_context != FIELD))
{
error ("virtual outside class declaration");
virtualp = 0;
}
/* Static anonymous unions are dealt with here. */
if (staticp && decl_context == TYPENAME
&& TREE_CODE (declspecs) == TREE_LIST
&& ANON_AGGR_TYPE_P (TREE_VALUE (declspecs)))
decl_context = FIELD;
/* Warn about storage classes that are invalid for certain
kinds of declarations (parameters, typenames, etc.). */
if (nclasses > 1)
error ("multiple storage classes in declaration of `%s'", name);
else if (decl_context != NORMAL && nclasses > 0)
{
if ((decl_context == PARM || decl_context == CATCHPARM)
&& (RIDBIT_SETP (RID_REGISTER, specbits)
|| RIDBIT_SETP (RID_AUTO, specbits)))
;
else if (RIDBIT_SETP (RID_TYPEDEF, specbits))
;
else if (decl_context == FIELD
/* C++ allows static class elements */
&& RIDBIT_SETP (RID_STATIC, specbits))
/* C++ also allows inlines and signed and unsigned elements,
but in those cases we don't come in here. */
;
else
{
if (decl_context == FIELD)
{
tree tmp = NULL_TREE;
register int op = 0;
if (declarator)
{
/* Avoid trying to get an operand off an identifier node. */
if (TREE_CODE (declarator) == IDENTIFIER_NODE)
tmp = declarator;
else
tmp = TREE_OPERAND (declarator, 0);
op = IDENTIFIER_OPNAME_P (tmp);
if (IDENTIFIER_TYPENAME_P (tmp))
{
if (IDENTIFIER_GLOBAL_VALUE (tmp)
&& (TREE_CODE (IDENTIFIER_GLOBAL_VALUE (tmp))
== TYPE_DECL))
name = IDENTIFIER_POINTER (tmp);
else
name = "<invalid operator>";
}
}
error ("storage class specified for %s `%s'",
op ? "member operator" : "field",
name);
}
else
{
if (decl_context == PARM || decl_context == CATCHPARM)
error ("storage class specified for parameter `%s'", name);
else
error ("storage class specified for typename");
}
RIDBIT_RESET (RID_REGISTER, specbits);
RIDBIT_RESET (RID_AUTO, specbits);
RIDBIT_RESET (RID_EXTERN, specbits);
}
}
else if (RIDBIT_SETP (RID_EXTERN, specbits) && initialized && !funcdef_flag)
{
if (toplevel_bindings_p ())
{
/* It's common practice (and completely valid) to have a const
be initialized and declared extern. */
if (!(type_quals & TYPE_QUAL_CONST))
warning ("`%s' initialized and declared `extern'", name);
}
else
error ("`%s' has both `extern' and initializer", name);
}
else if (RIDBIT_SETP (RID_EXTERN, specbits) && funcdef_flag
&& ! toplevel_bindings_p ())
error ("nested function `%s' declared `extern'", name);
else if (toplevel_bindings_p ())
{
if (RIDBIT_SETP (RID_AUTO, specbits))
error ("top-level declaration of `%s' specifies `auto'", name);
}
if (nclasses > 0 && friendp)
error ("storage class specifiers invalid in friend function declarations");
/* Now figure out the structure of the declarator proper.
Descend through it, creating more complex types, until we reach
the declared identifier (or NULL_TREE, in an absolute declarator). */
while (declarator && TREE_CODE (declarator) != IDENTIFIER_NODE
&& TREE_CODE (declarator) != TEMPLATE_ID_EXPR)
{
/* Each level of DECLARATOR is either an ARRAY_REF (for ...[..]),
an INDIRECT_REF (for *...),
a CALL_EXPR (for ...(...)),
an identifier (for the name being declared)
or a null pointer (for the place in an absolute declarator
where the name was omitted).
For the last two cases, we have just exited the loop.
For C++ it could also be
a SCOPE_REF (for class :: ...). In this case, we have converted
sensible names to types, and those are the values we use to
qualify the member name.
an ADDR_EXPR (for &...),
a BIT_NOT_EXPR (for destructors)
At this point, TYPE is the type of elements of an array,
or for a function to return, or for a pointer to point to.
After this sequence of ifs, TYPE is the type of the
array or function or pointer, and DECLARATOR has had its
outermost layer removed. */
if (type == error_mark_node)
{
if (TREE_CODE (declarator) == SCOPE_REF)
declarator = TREE_OPERAND (declarator, 1);
else
declarator = TREE_OPERAND (declarator, 0);
continue;
}
if (quals != NULL_TREE
&& (declarator == NULL_TREE
|| TREE_CODE (declarator) != SCOPE_REF))
{
if (ctype == NULL_TREE && TREE_CODE (type) == METHOD_TYPE)
ctype = TYPE_METHOD_BASETYPE (type);
if (ctype != NULL_TREE)
{
tree dummy = build_decl (TYPE_DECL, NULL_TREE, type);
grok_method_quals (ctype, dummy, quals);
type = TREE_TYPE (dummy);
ctype = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (type)));
quals = NULL_TREE;
}
}
switch (TREE_CODE (declarator))
{
case TREE_LIST:
{
/* We encode a declarator with embedded attributes using
a TREE_LIST. */
tree attrs = TREE_PURPOSE (declarator);
tree inner_decl;
int attr_flags;
declarator = TREE_VALUE (declarator);
inner_decl = declarator;
while (inner_decl != NULL_TREE
&& TREE_CODE (inner_decl) == TREE_LIST)
inner_decl = TREE_VALUE (inner_decl);
attr_flags = 0;
if (inner_decl == NULL_TREE
|| TREE_CODE (inner_decl) == IDENTIFIER_NODE)
attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
if (TREE_CODE (inner_decl) == CALL_EXPR)
attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
if (TREE_CODE (inner_decl) == ARRAY_REF)
attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
returned_attrs = decl_attributes (&type,
chainon (returned_attrs, attrs),
attr_flags);
}
break;
case ARRAY_REF:
{
register tree size;
size = TREE_OPERAND (declarator, 1);
/* VC++ spells a zero-sized array with []. */
if (size == NULL_TREE && decl_context == FIELD && ! staticp
&& ! RIDBIT_SETP (RID_TYPEDEF, specbits))
size = integer_zero_node;
declarator = TREE_OPERAND (declarator, 0);
type = create_array_type_for_decl (dname, type, size);
/* VLAs never work as fields. */
if (decl_context == FIELD && !processing_template_decl
&& TREE_CODE (type) == ARRAY_TYPE
&& TYPE_DOMAIN (type) != NULL_TREE
&& !TREE_CONSTANT (TYPE_MAX_VALUE (TYPE_DOMAIN (type))))
{
error ("size of member `%D' is not constant", dname);
/* Proceed with arbitrary constant size, so that offset
computations don't get confused. */
type = create_array_type_for_decl (dname, TREE_TYPE (type),
integer_one_node);
}
ctype = NULL_TREE;
}
break;
case CALL_EXPR:
{
tree arg_types;
int funcdecl_p;
tree inner_parms = CALL_DECLARATOR_PARMS (declarator);
tree inner_decl = TREE_OPERAND (declarator, 0);
/* Declaring a function type.
Make sure we have a valid type for the function to return. */
/* We now know that the TYPE_QUALS don't apply to the
decl, but to its return type. */
type_quals = TYPE_UNQUALIFIED;
/* Warn about some types functions can't return. */
if (TREE_CODE (type) == FUNCTION_TYPE)
{
error ("`%s' declared as function returning a function", name);
type = integer_type_node;
}
if (TREE_CODE (type) == ARRAY_TYPE)
{
error ("`%s' declared as function returning an array", name);
type = integer_type_node;
}
if (inner_decl && TREE_CODE (inner_decl) == SCOPE_REF)
inner_decl = TREE_OPERAND (inner_decl, 1);
if (inner_decl && TREE_CODE (inner_decl) == TEMPLATE_ID_EXPR)
inner_decl = dname;
/* Pick up type qualifiers which should be applied to `this'. */
quals = CALL_DECLARATOR_QUALS (declarator);
/* Pick up the exception specifications. */
raises = CALL_DECLARATOR_EXCEPTION_SPEC (declarator);
/* Say it's a definition only for the CALL_EXPR
closest to the identifier. */
funcdecl_p
= inner_decl
&& (TREE_CODE (inner_decl) == IDENTIFIER_NODE
|| TREE_CODE (inner_decl) == TEMPLATE_ID_EXPR
|| TREE_CODE (inner_decl) == BIT_NOT_EXPR);
if (ctype == NULL_TREE
&& decl_context == FIELD
&& funcdecl_p
&& (friendp == 0 || dname == current_class_name))
ctype = current_class_type;
if (ctype && sfk == sfk_conversion)
TYPE_HAS_CONVERSION (ctype) = 1;
if (ctype && constructor_name (ctype) == dname)
{
/* We are within a class's scope. If our declarator name
is the same as the class name, and we are defining
a function, then it is a constructor/destructor, and
therefore returns a void type. */
if (flags == DTOR_FLAG)
{
/* ISO C++ 12.4/2. A destructor may not be
declared const or volatile. A destructor may
not be static. */
if (staticp == 2)
error ("destructor cannot be static member function");
if (quals)
{
error ("destructors may not be `%s'",
IDENTIFIER_POINTER (TREE_VALUE (quals)));
quals = NULL_TREE;
}
if (decl_context == FIELD)
{
if (! member_function_or_else (ctype,
current_class_type,
flags))
return void_type_node;
}
}
else /* It's a constructor. */
{
if (explicitp == 1)
explicitp = 2;
/* ISO C++ 12.1. A constructor may not be
declared const or volatile. A constructor may
not be virtual. A constructor may not be
static. */
if (staticp == 2)
error ("constructor cannot be static member function");
if (virtualp)
{
pedwarn ("constructors cannot be declared virtual");
virtualp = 0;
}
if (quals)
{
error ("constructors may not be `%s'",
IDENTIFIER_POINTER (TREE_VALUE (quals)));
quals = NULL_TREE;
}
{
RID_BIT_TYPE tmp_bits;
memcpy (&tmp_bits, &specbits, sizeof (RID_BIT_TYPE));
RIDBIT_RESET (RID_INLINE, tmp_bits);
RIDBIT_RESET (RID_STATIC, tmp_bits);
if (RIDBIT_ANY_SET (tmp_bits))
error ("return value type specifier for constructor ignored");
}
if (decl_context == FIELD)
{
if (! member_function_or_else (ctype,
current_class_type,
flags))
return void_type_node;
TYPE_HAS_CONSTRUCTOR (ctype) = 1;
if (sfk != sfk_constructor)
return NULL_TREE;
}
}
if (decl_context == FIELD)
staticp = 0;
}
else if (friendp)
{
if (initialized)
error ("can't initialize friend function `%s'", name);
if (virtualp)
{
/* Cannot be both friend and virtual. */
error ("virtual functions cannot be friends");
RIDBIT_RESET (RID_FRIEND, specbits);
friendp = 0;
}
if (decl_context == NORMAL)
error ("friend declaration not in class definition");
if (current_function_decl && funcdef_flag)
error ("can't define friend function `%s' in a local class definition",
name);
}
/* Construct the function type and go to the next
inner layer of declarator. */
declarator = TREE_OPERAND (declarator, 0);
/* FIXME: This is where default args should be fully
processed. */
arg_types = grokparms (inner_parms);
if (declarator && flags == DTOR_FLAG)
{
/* A destructor declared in the body of a class will
be represented as a BIT_NOT_EXPR. But, we just
want the underlying IDENTIFIER. */
if (TREE_CODE (declarator) == BIT_NOT_EXPR)
declarator = TREE_OPERAND (declarator, 0);
if (arg_types != void_list_node)
{
error ("destructors may not have parameters");
arg_types = void_list_node;
last_function_parms = NULL_TREE;
}
}
/* ANSI says that `const int foo ();'
does not make the function foo const. */
type = build_function_type (type, arg_types);
{
tree t;
for (t = arg_types; t; t = TREE_CHAIN (t))
if (TREE_PURPOSE (t)
&& TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
{
add_defarg_fn (type);
break;
}
}
}
break;
case ADDR_EXPR:
case INDIRECT_REF:
/* Filter out pointers-to-references and references-to-references.
We can get these if a TYPE_DECL is used. */
if (TREE_CODE (type) == REFERENCE_TYPE)
{
error ("cannot declare %s to references",
TREE_CODE (declarator) == ADDR_EXPR
? "references" : "pointers");
declarator = TREE_OPERAND (declarator, 0);
continue;
}
if (TREE_CODE (type) == OFFSET_TYPE
&& (TREE_CODE (TREE_TYPE (type)) == VOID_TYPE
|| TREE_CODE (TREE_TYPE (type)) == REFERENCE_TYPE))
{
error ("cannot declare pointer to `%#T' member",
TREE_TYPE (type));
type = TREE_TYPE (type);
}
/* Merge any constancy or volatility into the target type
for the pointer. */
/* We now know that the TYPE_QUALS don't apply to the decl,
but to the target of the pointer. */
type_quals = TYPE_UNQUALIFIED;
if (TREE_CODE (declarator) == ADDR_EXPR)
{
if (TREE_CODE (type) == VOID_TYPE)
error ("invalid type: `void &'");
else
type = build_reference_type (type);
}
else if (TREE_CODE (type) == METHOD_TYPE)
type = build_ptrmemfunc_type (build_pointer_type (type));
else
type = build_pointer_type (type);
/* Process a list of type modifier keywords (such as
const or volatile) that were given inside the `*' or `&'. */
if (TREE_TYPE (declarator))
{
register tree typemodlist;
int erred = 0;
constp = 0;
volatilep = 0;
restrictp = 0;
for (typemodlist = TREE_TYPE (declarator); typemodlist;
typemodlist = TREE_CHAIN (typemodlist))
{
tree qualifier = TREE_VALUE (typemodlist);
if (qualifier == ridpointers[(int) RID_CONST])
constp++;
else if (qualifier == ridpointers[(int) RID_VOLATILE])
volatilep++;
else if (qualifier == ridpointers[(int) RID_RESTRICT])
restrictp++;
else if (!erred)
{
erred = 1;
error ("invalid type modifier within pointer declarator");
}
}
if (constp > 1)
pedwarn ("duplicate `const'");
if (volatilep > 1)
pedwarn ("duplicate `volatile'");
if (restrictp > 1)
pedwarn ("duplicate `restrict'");
type_quals = ((constp ? TYPE_QUAL_CONST : 0)
| (restrictp ? TYPE_QUAL_RESTRICT : 0)
| (volatilep ? TYPE_QUAL_VOLATILE : 0));
if (TREE_CODE (declarator) == ADDR_EXPR
&& (constp || volatilep))
{
if (constp)
pedwarn ("discarding `const' applied to a reference");
if (volatilep)
pedwarn ("discarding `volatile' applied to a reference");
type_quals &= ~(TYPE_QUAL_CONST | TYPE_QUAL_VOLATILE);
}
type = cp_build_qualified_type (type, type_quals);
}
declarator = TREE_OPERAND (declarator, 0);
ctype = NULL_TREE;
break;
case SCOPE_REF:
{
/* We have converted type names to NULL_TREE if the
name was bogus, or to a _TYPE node, if not.
The variable CTYPE holds the type we will ultimately
resolve to. The code here just needs to build
up appropriate member types. */
tree sname = TREE_OPERAND (declarator, 1);
tree t;
/* Destructors can have their visibilities changed as well. */
if (TREE_CODE (sname) == BIT_NOT_EXPR)
sname = TREE_OPERAND (sname, 0);
if (TREE_COMPLEXITY (declarator) == 0)
/* This needs to be here, in case we are called
multiple times. */ ;
else if (TREE_COMPLEXITY (declarator) == -1)
/* Namespace member. */
pop_decl_namespace ();
else if (friendp && (TREE_COMPLEXITY (declarator) < 2))
/* Don't fall out into global scope. Hides real bug? --eichin */ ;
else if (! IS_AGGR_TYPE_CODE
(TREE_CODE (TREE_OPERAND (declarator, 0))))
;
else if (TREE_COMPLEXITY (declarator) == current_class_depth)
{
/* Resolve any TYPENAME_TYPEs from the decl-specifier-seq
that refer to ctype. They couldn't be resolved earlier
because we hadn't pushed into the class yet.
Example: resolve 'B<T>::type' in
'B<typename B<T>::type> B<T>::f () { }'. */
if (current_template_parms
&& uses_template_parms (type)
&& uses_template_parms (current_class_type))
{
tree args = current_template_args ();
type = tsubst (type, args, /*complain=*/1, NULL_TREE);
}
/* This pop_nested_class corresponds to the
push_nested_class used to push into class scope for
parsing the argument list of a function decl, in
qualified_id. */
pop_nested_class ();
TREE_COMPLEXITY (declarator) = current_class_depth;
}
else
my_friendly_abort (16);
if (TREE_OPERAND (declarator, 0) == NULL_TREE)
{
/* We had a reference to a global decl, or
perhaps we were given a non-aggregate typedef,
in which case we cleared this out, and should just
keep going as though it wasn't there. */
declarator = sname;
continue;
}
ctype = TREE_OPERAND (declarator, 0);
t = ctype;
while (t != NULL_TREE && CLASS_TYPE_P (t))
{
/* You're supposed to have one `template <...>'
for every template class, but you don't need one
for a full specialization. For example:
template <class T> struct S{};
template <> struct S<int> { void f(); };
void S<int>::f () {}
is correct; there shouldn't be a `template <>' for
the definition of `S<int>::f'. */
if (CLASSTYPE_TEMPLATE_INFO (t)
&& (CLASSTYPE_TEMPLATE_INSTANTIATION (t)
|| uses_template_parms (CLASSTYPE_TI_ARGS (t)))
&& PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
template_count += 1;
t = TYPE_MAIN_DECL (t);
t = DECL_CONTEXT (t);
}
if (sname == NULL_TREE)
goto done_scoping;
if (TREE_CODE (sname) == IDENTIFIER_NODE)
{
/* This is the `standard' use of the scoping operator:
basetype :: member . */
if (ctype == current_class_type)
{
/* class A {
void A::f ();
};
Is this ill-formed? */
if (pedantic)
pedwarn ("extra qualification `%T::' on member `%s' ignored",
ctype, name);
}
else if (TREE_CODE (type) == FUNCTION_TYPE)
{
if (current_class_type == NULL_TREE || friendp)
type = build_cplus_method_type (ctype, TREE_TYPE (type),
TYPE_ARG_TYPES (type));
else
{
error ("cannot declare member function `%T::%s' within `%T'",
ctype, name, current_class_type);
return void_type_node;
}
}
else if (RIDBIT_SETP (RID_TYPEDEF, specbits)
|| COMPLETE_TYPE_P (complete_type (ctype)))
{
/* Have to move this code elsewhere in this function.
this code is used for i.e., typedef int A::M; M *pm;
It is? How? jason 10/2/94 */
if (current_class_type)
{
error ("cannot declare member `%T::%s' within `%T'",
ctype, name, current_class_type);
return void_type_node;
}
type = build_offset_type (ctype, type);
}
else
{
incomplete_type_error (NULL_TREE, ctype);
return error_mark_node;
}
declarator = sname;
}
else if (TREE_CODE (sname) == SCOPE_REF)
my_friendly_abort (17);
else
{
done_scoping:
declarator = TREE_OPERAND (declarator, 1);
if (declarator && TREE_CODE (declarator) == CALL_EXPR)
/* In this case, we will deal with it later. */
;
else
{
if (TREE_CODE (type) == FUNCTION_TYPE)
type = build_cplus_method_type (ctype, TREE_TYPE (type),
TYPE_ARG_TYPES (type));
else
type = build_offset_type (ctype, type);
}
}
}
break;
case BIT_NOT_EXPR:
declarator = TREE_OPERAND (declarator, 0);
break;
case RECORD_TYPE:
case UNION_TYPE:
case ENUMERAL_TYPE:
declarator = NULL_TREE;
break;
case ERROR_MARK:
declarator = NULL_TREE;
break;
default:
my_friendly_abort (158);
}
}
if (returned_attrs)
{
if (attrlist)
*attrlist = chainon (returned_attrs, *attrlist);
else
attrlist = &returned_attrs;
}
/* Now TYPE has the actual type. */
/* Did array size calculations overflow? */
if (TREE_CODE (type) == ARRAY_TYPE
&& COMPLETE_TYPE_P (type)
&& TREE_OVERFLOW (TYPE_SIZE (type)))
{
error ("size of array `%s' is too large", name);
/* If we proceed with the array type as it is, we'll eventually
crash in tree_low_cst(). */
type = error_mark_node;
}
if (explicitp == 1 || (explicitp && friendp))
{
/* [dcl.fct.spec] The explicit specifier shall only be used in
declarations of constructors within a class definition. */
error ("only declarations of constructors can be `explicit'");
explicitp = 0;
}
if (RIDBIT_SETP (RID_MUTABLE, specbits))
{
if (current_class_name == NULL_TREE || decl_context == PARM || friendp)
{
error ("non-member `%s' cannot be declared `mutable'", name);
RIDBIT_RESET (RID_MUTABLE, specbits);
}
else if (decl_context == TYPENAME || RIDBIT_SETP (RID_TYPEDEF, specbits))
{
error ("non-object member `%s' cannot be declared `mutable'", name);
RIDBIT_RESET (RID_MUTABLE, specbits);
}
else if (TREE_CODE (type) == FUNCTION_TYPE
|| TREE_CODE (type) == METHOD_TYPE)
{
error ("function `%s' cannot be declared `mutable'", name);
RIDBIT_RESET (RID_MUTABLE, specbits);
}
else if (staticp)
{
error ("static `%s' cannot be declared `mutable'", name);
RIDBIT_RESET (RID_MUTABLE, specbits);
}
else if (type_quals & TYPE_QUAL_CONST)
{
error ("const `%s' cannot be declared `mutable'", name);
RIDBIT_RESET (RID_MUTABLE, specbits);
}
}
if (declarator == NULL_TREE
|| TREE_CODE (declarator) == IDENTIFIER_NODE
|| (TREE_CODE (declarator) == TEMPLATE_ID_EXPR
&& (TREE_CODE (type) == FUNCTION_TYPE
|| TREE_CODE (type) == METHOD_TYPE)))
/* OK */;
else if (TREE_CODE (declarator) == TEMPLATE_ID_EXPR)
{
error ("template-id `%D' used as a declarator", declarator);
declarator = dname;
}
else
/* Unexpected declarator format. */
my_friendly_abort (990210);
/* If this is declaring a typedef name, return a TYPE_DECL. */
if (RIDBIT_SETP (RID_TYPEDEF, specbits) && decl_context != TYPENAME)
{
tree decl;
/* Note that the grammar rejects storage classes
in typenames, fields or parameters. */
if (current_lang_name == lang_name_java)
TYPE_FOR_JAVA (type) = 1;
if (decl_context == FIELD)
{
if (declarator == constructor_name (current_class_type))
pedwarn ("ISO C++ forbids nested type `%D' with same name as enclosing class",
declarator);
decl = build_lang_decl (TYPE_DECL, declarator, type);
}
else
{
decl = build_decl (TYPE_DECL, declarator, type);
if (!current_function_decl)
DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
}
/* If the user declares "typedef struct {...} foo" then the
struct will have an anonymous name. Fill that name in now.
Nothing can refer to it, so nothing needs know about the name
change. */
if (type != error_mark_node
&& declarator
&& TYPE_NAME (type)
&& TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
&& TYPE_ANONYMOUS_P (type)
&& cp_type_quals (type) == TYPE_UNQUALIFIED)
{
tree oldname = TYPE_NAME (type);
tree t;
/* Replace the anonymous name with the real name everywhere. */
lookup_tag_reverse (type, declarator);
for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
if (TYPE_NAME (t) == oldname)
TYPE_NAME (t) = decl;
if (TYPE_LANG_SPECIFIC (type))
TYPE_WAS_ANONYMOUS (type) = 1;
/* If this is a typedef within a template class, the nested
type is a (non-primary) template. The name for the
template needs updating as well. */
if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
= TYPE_IDENTIFIER (type);
/* FIXME remangle member functions; member functions of a
type with external linkage have external linkage. */
}
if (TREE_CODE (type) == OFFSET_TYPE || TREE_CODE (type) == METHOD_TYPE)
{
cp_error_at ("typedef name may not be class-qualified", decl);
return NULL_TREE;
}
else if (quals)
{
if (ctype == NULL_TREE)
{
if (TREE_CODE (type) != METHOD_TYPE)
cp_error_at ("invalid type qualifier for non-member function type", decl);
else
ctype = TYPE_METHOD_BASETYPE (type);
}
if (ctype != NULL_TREE)
grok_method_quals (ctype, decl, quals);
}
if (RIDBIT_SETP (RID_SIGNED, specbits)
|| (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
bad_specifiers (decl, "type", virtualp, quals != NULL_TREE,
inlinep, friendp, raises != NULL_TREE);
if (initialized)
error ("typedef declaration includes an initializer");
return decl;
}
/* Detect the case of an array type of unspecified size
which came, as such, direct from a typedef name.
We must copy the type, so that each identifier gets
a distinct type, so that each identifier's size can be
controlled separately by its own initializer. */
if (type != 0 && typedef_type != 0
&& TREE_CODE (type) == ARRAY_TYPE && TYPE_DOMAIN (type) == 0
&& TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
{
type = build_cplus_array_type (TREE_TYPE (type), TYPE_DOMAIN (type));
}
/* Detect where we're using a typedef of function type to declare a
function. last_function_parms will not be set, so we must create
it now. */
if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
{
tree decls = NULL_TREE;
tree args;
for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
{
tree decl = build_decl (PARM_DECL, NULL_TREE, TREE_VALUE (args));
TREE_CHAIN (decl) = decls;
decls = decl;
}
last_function_parms = nreverse (decls);
}
/* If this is a type name (such as, in a cast or sizeof),
compute the type and return it now. */
if (decl_context == TYPENAME)
{
/* Note that the grammar rejects storage classes
in typenames, fields or parameters. */
if (type_quals != TYPE_UNQUALIFIED)
type_quals = TYPE_UNQUALIFIED;
/* Special case: "friend class foo" looks like a TYPENAME context. */
if (friendp)
{
if (type_quals != TYPE_UNQUALIFIED)
{
error ("type qualifiers specified for friend class declaration");
type_quals = TYPE_UNQUALIFIED;
}
if (inlinep)
{
error ("`inline' specified for friend class declaration");
inlinep = 0;
}
/* Until core issue 180 is resolved, allow 'friend typename A::B'.
But don't allow implicit typenames except with a class-key. */
if (!current_aggr && (TREE_CODE (type) != TYPENAME_TYPE
|| IMPLICIT_TYPENAME_P (type)))
{
if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
pedwarn ("template parameters cannot be friends");
else if (TREE_CODE (type) == TYPENAME_TYPE)
pedwarn ("\
friend declaration requires class-key, i.e. `friend class %T::%T'",
constructor_name (current_class_type),
TYPE_IDENTIFIER (type));
else
pedwarn ("\
friend declaration requires class-key, i.e. `friend %#T'",
type);
}
/* Only try to do this stuff if we didn't already give up. */
if (type != integer_type_node)
{
/* DR 209. The friendly class does not need to be accessible
in the scope of the class granting friendship. */
skip_type_access_control ();
/* A friendly class? */
if (current_class_type)
make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type));
else
error ("trying to make class `%T' a friend of global scope",
type);
type = void_type_node;
}
}
else if (quals)
{
if (ctype == NULL_TREE)
{
if (TREE_CODE (type) != METHOD_TYPE)
error ("invalid qualifiers on non-member function type");
else
ctype = TYPE_METHOD_BASETYPE (type);
}
if (ctype)
{
tree dummy = build_decl (TYPE_DECL, declarator, type);
grok_method_quals (ctype, dummy, quals);
type = TREE_TYPE (dummy);
}
}
return type;
}
else if (declarator == NULL_TREE && decl_context != PARM
&& decl_context != CATCHPARM
&& TREE_CODE (type) != UNION_TYPE
&& ! bitfield)
{
error ("abstract declarator `%T' used as declaration", type);
declarator = make_anon_name ();
}
/* `void' at top level (not within pointer)
is allowed only in typedefs or type names.
We don't complain about parms either, but that is because
a better error message can be made later. */
if (TREE_CODE (type) == VOID_TYPE && decl_context != PARM)
{
if (! declarator)
error ("unnamed variable or field declared void");
else if (TREE_CODE (declarator) == IDENTIFIER_NODE)
{
if (IDENTIFIER_OPNAME_P (declarator))
my_friendly_abort (356);
else
error ("variable or field `%s' declared void", name);
}
else
error ("variable or field declared void");
type = integer_type_node;
}
/* Now create the decl, which may be a VAR_DECL, a PARM_DECL
or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
if (decl_context == PARM || decl_context == CATCHPARM)
{
if (ctype || in_namespace)
error ("cannot use `::' in parameter declaration");
/* A parameter declared as an array of T is really a pointer to T.
One declared as a function is really a pointer to a function.
One declared as a member is really a pointer to member. */
if (TREE_CODE (type) == ARRAY_TYPE)
{
/* Transfer const-ness of array into that of type pointed to. */
type = build_pointer_type (TREE_TYPE (type));
type_quals = TYPE_UNQUALIFIED;
}
else if (TREE_CODE (type) == FUNCTION_TYPE)
type = build_pointer_type (type);
else if (TREE_CODE (type) == OFFSET_TYPE)
type = build_pointer_type (type);
}
{
register tree decl;
if (decl_context == PARM)
{
decl = build_decl (PARM_DECL, declarator, type);
bad_specifiers (decl, "parameter", virtualp, quals != NULL_TREE,
inlinep, friendp, raises != NULL_TREE);
/* Compute the type actually passed in the parmlist,
for the case where there is no prototype.
(For example, shorts and chars are passed as ints.)
When there is a prototype, this is overridden later. */
DECL_ARG_TYPE (decl) = type_promotes_to (type);
}
else if (decl_context == FIELD)
{
if (type == error_mark_node)
{
/* Happens when declaring arrays of sizes which
are error_mark_node, for example. */
decl = NULL_TREE;
}
else if (in_namespace && !friendp)
{
/* Something like struct S { int N::j; }; */
error ("invalid use of `::'");
decl = NULL_TREE;
}
else if (TREE_CODE (type) == FUNCTION_TYPE)
{
int publicp = 0;
tree function_context;
/* We catch the others as conflicts with the builtin
typedefs. */
if (friendp && declarator == ridpointers[(int) RID_SIGNED])
{
error ("function `%D' cannot be declared friend",
declarator);
friendp = 0;
}
if (friendp == 0)
{
if (ctype == NULL_TREE)
ctype = current_class_type;
if (ctype == NULL_TREE)
{
error ("can't make `%D' into a method -- not in a class",
declarator);
return void_type_node;
}
/* ``A union may [ ... ] not [ have ] virtual functions.''
ARM 9.5 */
if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
{
error ("function `%D' declared virtual inside a union",
declarator);
return void_type_node;
}
if (declarator == ansi_opname (NEW_EXPR)
|| declarator == ansi_opname (VEC_NEW_EXPR)
|| declarator == ansi_opname (DELETE_EXPR)
|| declarator == ansi_opname (VEC_DELETE_EXPR))
{
if (virtualp)
{
error ("`%D' cannot be declared virtual, since it is always static",
declarator);
virtualp = 0;
}
}
else if (staticp < 2)
type = build_cplus_method_type (ctype, TREE_TYPE (type),
TYPE_ARG_TYPES (type));
}
/* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
function_context = (ctype != NULL_TREE) ?
decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
publicp = (! friendp || ! staticp)
&& function_context == NULL_TREE;
decl = grokfndecl (ctype, type,
TREE_CODE (declarator) != TEMPLATE_ID_EXPR
? declarator : dname,
declarator,
virtualp, flags, quals, raises,
friendp ? -1 : 0, friendp, publicp, inlinep,
funcdef_flag, template_count, in_namespace);
if (decl == NULL_TREE)
return decl;
#if 0
/* This clobbers the attrs stored in `decl' from `attrlist'. */
/* The decl and setting of decl_attr is also turned off. */
decl = build_decl_attribute_variant (decl, decl_attr);
#endif
/* [class.conv.ctor]
A constructor declared without the function-specifier
explicit that can be called with a single parameter
specifies a conversion from the type of its first
parameter to the type of its class. Such a constructor
is called a converting constructor. */
if (explicitp == 2)
DECL_NONCONVERTING_P (decl) = 1;
else if (DECL_CONSTRUCTOR_P (decl))
{
/* The constructor can be called with exactly one
parameter if there is at least one parameter, and
any subsequent parameters have default arguments.
Ignore any compiler-added parms. */
tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
if (arg_types == void_list_node
|| (arg_types
&& TREE_CHAIN (arg_types)
&& TREE_CHAIN (arg_types) != void_list_node
&& !TREE_PURPOSE (TREE_CHAIN (arg_types))))
DECL_NONCONVERTING_P (decl) = 1;
}
}
else if (TREE_CODE (type) == METHOD_TYPE)
{
/* We only get here for friend declarations of
members of other classes. */
/* All method decls are public, so tell grokfndecl to set
TREE_PUBLIC, also. */
decl = grokfndecl (ctype, type, declarator, declarator,
virtualp, flags, quals, raises,
friendp ? -1 : 0, friendp, 1, 0, funcdef_flag,
template_count, in_namespace);
if (decl == NULL_TREE)
return NULL_TREE;
}
else if (!staticp && ! processing_template_decl
&& !COMPLETE_TYPE_P (complete_type (type))
&& (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
{
if (declarator)
error ("field `%D' has incomplete type", declarator);
else
error ("name `%T' has incomplete type", type);
/* If we're instantiating a template, tell them which
instantiation made the field's type be incomplete. */
if (current_class_type
&& TYPE_NAME (current_class_type)
&& IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
&& declspecs && TREE_VALUE (declspecs)
&& TREE_TYPE (TREE_VALUE (declspecs)) == type)
error (" in instantiation of template `%T'",
current_class_type);
type = error_mark_node;
decl = NULL_TREE;
}
else
{
if (friendp)
{
error ("`%s' is neither function nor member function; cannot be declared friend",
IDENTIFIER_POINTER (declarator));
friendp = 0;
}
decl = NULL_TREE;
}
if (friendp)
{
/* Friends are treated specially. */
tree t = NULL_TREE;
/* DR 209. The friend does not need to be accessible at this
point. */
skip_type_access_control ();
if (ctype == current_class_type)
warning ("member functions are implicitly friends of their class");
if (decl && DECL_NAME (decl))
{
if (template_class_depth (current_class_type) == 0)
{
decl = check_explicit_specialization
(declarator, decl,
template_count, 2 * (funcdef_flag != 0) + 4);
if (decl == error_mark_node)
return error_mark_node;
}
t = do_friend (ctype, declarator, decl,
last_function_parms, *attrlist, flags, quals,
funcdef_flag);
}
if (t && funcdef_flag)
return t;
return void_type_node;
}
/* Structure field. It may not be a function, except for C++ */
if (decl == NULL_TREE)
{
if (initialized)
{
if (!staticp)
{
/* An attempt is being made to initialize a non-static
member. But, from [class.mem]:
4 A member-declarator can contain a
constant-initializer only if it declares a static
member (_class.static_) of integral or enumeration
type, see _class.static.data_.
This used to be relatively common practice, but
the rest of the compiler does not correctly
handle the initialization unless the member is
static so we make it static below. */
pedwarn ("ISO C++ forbids initialization of member `%D'",
declarator);
pedwarn ("making `%D' static", declarator);
staticp = 1;
}
if (uses_template_parms (type))
/* We'll check at instantiation time. */
;
else if (check_static_variable_definition (declarator,
type))
/* If we just return the declaration, crashes
will sometimes occur. We therefore return
void_type_node, as if this was a friend
declaration, to cause callers to completely
ignore this declaration. */
return void_type_node;
}
/* 9.2p13 [class.mem] */
if (declarator == constructor_name (current_class_type)
/* The standard does not allow non-static data members
here either, but we agreed at the 10/99 meeting
to change that in TC 1 so that they are allowed in
classes with no user-defined constructors. */
&& staticp)
pedwarn ("ISO C++ forbids static data member `%D' with same name as enclosing class",
declarator);
if (staticp)
{
/* C++ allows static class members. All other work
for this is done by grokfield. */
decl = build_lang_decl (VAR_DECL, declarator, type);
TREE_STATIC (decl) = 1;
/* In class context, 'static' means public access. */
TREE_PUBLIC (decl) = DECL_EXTERNAL (decl) = 1;
}
else
{
decl = build_decl (FIELD_DECL, declarator, type);
DECL_NONADDRESSABLE_P (decl) = bitfield;
if (RIDBIT_SETP (RID_MUTABLE, specbits))
{
DECL_MUTABLE_P (decl) = 1;
RIDBIT_RESET (RID_MUTABLE, specbits);
}
}
bad_specifiers (decl, "field", virtualp, quals != NULL_TREE,
inlinep, friendp, raises != NULL_TREE);
}
}
else if (TREE_CODE (type) == FUNCTION_TYPE || TREE_CODE (type) == METHOD_TYPE)
{
tree original_name;
int publicp = 0;
if (! declarator)
return NULL_TREE;
if (TREE_CODE (declarator) == TEMPLATE_ID_EXPR)
original_name = dname;
else
original_name = declarator;
if (RIDBIT_SETP (RID_AUTO, specbits))
error ("storage class `auto' invalid for function `%s'", name);
else if (RIDBIT_SETP (RID_REGISTER, specbits))
error ("storage class `register' invalid for function `%s'", name);
/* Function declaration not at top level.
Storage classes other than `extern' are not allowed
and `extern' makes no difference. */
if (! toplevel_bindings_p ()
&& (RIDBIT_SETP (RID_STATIC, specbits)
|| RIDBIT_SETP (RID_INLINE, specbits))
&& pedantic)
{
if (RIDBIT_SETP (RID_STATIC, specbits))
pedwarn ("storage class `static' invalid for function `%s' declared out of global scope", name);
else
pedwarn ("storage class `inline' invalid for function `%s' declared out of global scope", name);
}
if (ctype == NULL_TREE)
{
if (virtualp)
{
error ("virtual non-class function `%s'", name);
virtualp = 0;
}
}
else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2)
type = build_cplus_method_type (ctype, TREE_TYPE (type),
TYPE_ARG_TYPES (type));
/* Record presence of `static'. */
publicp = (ctype != NULL_TREE
|| RIDBIT_SETP (RID_EXTERN, specbits)
|| !RIDBIT_SETP (RID_STATIC, specbits));
decl = grokfndecl (ctype, type, original_name, declarator,
virtualp, flags, quals, raises,
1, friendp,
publicp, inlinep, funcdef_flag,
template_count, in_namespace);
if (decl == NULL_TREE)
return NULL_TREE;
if (staticp == 1)
{
int illegal_static = 0;
/* Don't allow a static member function in a class, and forbid
declaring main to be static. */
if (TREE_CODE (type) == METHOD_TYPE)
{
pedwarn ("cannot declare member function `%D' to have static linkage", decl);
illegal_static = 1;
}
else if (current_function_decl)
{
/* FIXME need arm citation */
error ("cannot declare static function inside another function");
illegal_static = 1;
}
if (illegal_static)
{
staticp = 0;
RIDBIT_RESET (RID_STATIC, specbits);
}
}
}
else
{
/* It's a variable. */
/* An uninitialized decl with `extern' is a reference. */
decl = grokvardecl (type, declarator, &specbits,
initialized,
(type_quals & TYPE_QUAL_CONST) != 0,
in_namespace);
bad_specifiers (decl, "variable", virtualp, quals != NULL_TREE,
inlinep, friendp, raises != NULL_TREE);
if (ctype)
{
DECL_CONTEXT (decl) = ctype;
if (staticp == 1)
{
pedwarn ("`static' may not be used when defining (as opposed to declaring) a static data member");
staticp = 0;
RIDBIT_RESET (RID_STATIC, specbits);
}
if (RIDBIT_SETP (RID_REGISTER, specbits) && TREE_STATIC (decl))
{
error ("static member `%D' declared `register'", decl);
RIDBIT_RESET (RID_REGISTER, specbits);
}
if (RIDBIT_SETP (RID_EXTERN, specbits) && pedantic)
{
pedwarn ("cannot explicitly declare member `%#D' to have extern linkage",
decl);
RIDBIT_RESET (RID_EXTERN, specbits);
}
}
}
my_friendly_assert (!RIDBIT_SETP (RID_MUTABLE, specbits), 19990927);
/* Record `register' declaration for warnings on &
and in case doing stupid register allocation. */
if (RIDBIT_SETP (RID_REGISTER, specbits))
DECL_REGISTER (decl) = 1;
if (RIDBIT_SETP (RID_EXTERN, specbits))
DECL_THIS_EXTERN (decl) = 1;
if (RIDBIT_SETP (RID_STATIC, specbits))
DECL_THIS_STATIC (decl) = 1;
/* Record constancy and volatility. There's no need to do this
when processing a template; we'll do this for the instantiated
declaration based on the type of DECL. */
if (!processing_template_decl)
c_apply_type_quals_to_decl (type_quals, decl);
return decl;
}
}
/* Tell if a parmlist/exprlist looks like an exprlist or a parmlist.
An empty exprlist is a parmlist. An exprlist which
contains only identifiers at the global level
is a parmlist. Otherwise, it is an exprlist. */
int
parmlist_is_exprlist (exprs)
tree exprs;
{
if (exprs == NULL_TREE || TREE_PARMLIST (exprs))
return 0;
if (toplevel_bindings_p ())
{
/* At the global level, if these are all identifiers,
then it is a parmlist. */
while (exprs)
{
if (TREE_CODE (TREE_VALUE (exprs)) != IDENTIFIER_NODE)
return 1;
exprs = TREE_CHAIN (exprs);
}
return 0;
}
return 1;
}
/* Subroutine of start_function. Ensure that each of the parameter
types (as listed in PARMS) is complete, as is required for a
function definition. */
static void
require_complete_types_for_parms (parms)
tree parms;
{
for (; parms; parms = TREE_CHAIN (parms))
{
if (VOID_TYPE_P (TREE_TYPE (parms)))
/* grokparms will have already issued an error */
TREE_TYPE (parms) = error_mark_node;
else if (complete_type_or_else (TREE_TYPE (parms), parms))
layout_decl (parms, 0);
else
TREE_TYPE (parms) = error_mark_node;
}
}
/* Returns non-zero if T is a local variable. */
int
local_variable_p (t)
tree t;
{
if ((TREE_CODE (t) == VAR_DECL
/* A VAR_DECL with a context that is a _TYPE is a static data
member. */
&& !TYPE_P (CP_DECL_CONTEXT (t))
/* Any other non-local variable must be at namespace scope. */
&& !DECL_NAMESPACE_SCOPE_P (t))
|| (TREE_CODE (t) == PARM_DECL))
return 1;
return 0;
}
/* Returns non-zero if T is an automatic local variable or a label.
(These are the declarations that need to be remapped when the code
containing them is duplicated.) */
int
nonstatic_local_decl_p (t)
tree t;
{
return ((local_variable_p (t) && !TREE_STATIC (t))
|| TREE_CODE (t) == LABEL_DECL
|| TREE_CODE (t) == RESULT_DECL);
}
/* Like local_variable_p, but suitable for use as a tree-walking
function. */
static tree
local_variable_p_walkfn (tp, walk_subtrees, data)
tree *tp;
int *walk_subtrees ATTRIBUTE_UNUSED;
void *data ATTRIBUTE_UNUSED;
{
return ((local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
? *tp : NULL_TREE);
}
/* Check that ARG, which is a default-argument expression for a
parameter DECL, is legal. Returns ARG, or ERROR_MARK_NODE, if
something goes wrong. DECL may also be a _TYPE node, rather than a
DECL, if there is no DECL available. */
tree
check_default_argument (decl, arg)
tree decl;
tree arg;
{
tree var;
tree decl_type;
if (TREE_CODE (arg) == DEFAULT_ARG)
/* We get a DEFAULT_ARG when looking at an in-class declaration
with a default argument. Ignore the argument for now; we'll
deal with it after the class is complete. */
return arg;
if (processing_template_decl || uses_template_parms (arg))
/* We don't do anything checking until instantiation-time. Note
that there may be uninstantiated arguments even for an
instantiated function, since default arguments are not
instantiated until they are needed. */
return arg;
if (TYPE_P (decl))
{
decl_type = decl;
decl = NULL_TREE;
}
else
decl_type = TREE_TYPE (decl);
if (arg == error_mark_node
|| decl == error_mark_node
|| TREE_TYPE (arg) == error_mark_node
|| decl_type == error_mark_node)
/* Something already went wrong. There's no need to check
further. */
return error_mark_node;
/* [dcl.fct.default]
A default argument expression is implicitly converted to the
parameter type. */
if (!TREE_TYPE (arg)
|| !can_convert_arg (decl_type, TREE_TYPE (arg), arg))
{
if (decl)
error ("default argument for `%#D' has type `%T'",
decl, TREE_TYPE (arg));
else
error ("default argument for parameter of type `%T' has type `%T'",
decl_type, TREE_TYPE (arg));
return error_mark_node;
}
/* [dcl.fct.default]
Local variables shall not be used in default argument
expressions.
The keyword `this' shall not be used in a default argument of a
member function. */
var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
NULL);
if (var)
{
error ("default argument `%E' uses local variable `%D'",
arg, var);
return error_mark_node;
}
/* All is well. */
return arg;
}
/* Decode the list of parameter types for a function type.
Given the list of things declared inside the parens,
return a list of types.
We determine whether ellipsis parms are used by PARMLIST_ELLIPSIS_P
flag. If unset, we append void_list_node. A parmlist declared
as `(void)' is accepted as the empty parmlist.
Also set last_function_parms to the chain of PARM_DECLs. */
static tree
grokparms (first_parm)
tree first_parm;
{
tree result = NULL_TREE;
tree decls = NULL_TREE;
int ellipsis = !first_parm || PARMLIST_ELLIPSIS_P (first_parm);
tree parm, chain;
int any_error = 0;
my_friendly_assert (!first_parm || TREE_PARMLIST (first_parm), 20001115);
for (parm = first_parm; parm != NULL_TREE; parm = chain)
{
tree type = NULL_TREE;
register tree decl = TREE_VALUE (parm);
tree init = TREE_PURPOSE (parm);
chain = TREE_CHAIN (parm);
/* @@ weak defense against parse errors. */
if (TREE_CODE (decl) != VOID_TYPE
&& TREE_CODE (decl) != TREE_LIST)
{
/* Give various messages as the need arises. */
if (TREE_CODE (decl) == STRING_CST)
error ("invalid string constant `%E'", decl);
else if (TREE_CODE (decl) == INTEGER_CST)
error ("invalid integer constant in parameter list, did you forget to give parameter name?");
continue;
}
if (parm == void_list_node)
break;
decl = grokdeclarator (TREE_VALUE (decl), TREE_PURPOSE (decl),
PARM, init != NULL_TREE, NULL);
if (! decl || TREE_TYPE (decl) == error_mark_node)
continue;
type = TREE_TYPE (decl);
if (VOID_TYPE_P (type))
{
if (same_type_p (type, void_type_node)
&& !DECL_NAME (decl) && !result && !chain && !ellipsis)
/* this is a parmlist of `(void)', which is ok. */
break;
incomplete_type_error (decl, type);
/* It's not a good idea to actually create parameters of
type `void'; other parts of the compiler assume that a
void type terminates the parameter list. */
type = error_mark_node;
TREE_TYPE (decl) = error_mark_node;
}
if (type != error_mark_node)
{
/* Top-level qualifiers on the parameters are
ignored for function types. */
type = TYPE_MAIN_VARIANT (type);
if (TREE_CODE (type) == METHOD_TYPE)
{
error ("parameter `%D' invalidly declared method type", decl);
type = build_pointer_type (type);
TREE_TYPE (decl) = type;
}
else if (TREE_CODE (type) == OFFSET_TYPE)
{
error ("parameter `%D' invalidly declared offset type", decl);
type = build_pointer_type (type);
TREE_TYPE (decl) = type;
}
else if (abstract_virtuals_error (decl, type))
any_error = 1; /* Seems like a good idea. */
else if (POINTER_TYPE_P (type))
{
/* [dcl.fct]/6, parameter types cannot contain pointers
(references) to arrays of unknown bound. */
tree t = TREE_TYPE (type);
int ptr = TYPE_PTR_P (type);
while (1)
{
if (TYPE_PTR_P (t))
ptr = 1;
else if (TREE_CODE (t) != ARRAY_TYPE)
break;
else if (!TYPE_DOMAIN (t))
break;
t = TREE_TYPE (t);
}
if (TREE_CODE (t) == ARRAY_TYPE)
error ("parameter `%D' includes %s to array of unknown bound `%T'",
decl, ptr ? "pointer" : "reference", t);
}
DECL_ARG_TYPE (decl) = TREE_TYPE (decl);
if (PROMOTE_PROTOTYPES
&& INTEGRAL_TYPE_P (type)
&& TYPE_PRECISION (type) < TYPE_PRECISION (integer_type_node))
DECL_ARG_TYPE (decl) = integer_type_node;
if (!any_error && init)
init = check_default_argument (decl, init);
else
init = NULL_TREE;
}
TREE_CHAIN (decl) = decls;
decls = decl;
result = tree_cons (init, type, result);
}
decls = nreverse (decls);
result = nreverse (result);
if (!ellipsis)
result = chainon (result, void_list_node);
last_function_parms = decls;
return result;
}
/* D is a constructor or overloaded `operator='.
Let T be the class in which D is declared. Then, this function
returns:
-1 if D's is an ill-formed constructor or copy assignment operator
whose first parameter is of type `T'.
0 if D is not a copy constructor or copy assignment
operator.
1 if D is a copy constructor or copy assignment operator whose
first parameter is a reference to const qualified T.
2 if D is a copy constructor or copy assignment operator whose
first parameter is a reference to non-const qualified T.
This function can be used as a predicate. Positive values indicate
a copy constructor and non-zero values indicate a copy assignment
operator. */
int
copy_fn_p (d)
tree d;
{
tree args;
tree arg_type;
int result = 1;
my_friendly_assert (DECL_FUNCTION_MEMBER_P (d), 20011208);
if (DECL_TEMPLATE_INFO (d) && is_member_template (DECL_TI_TEMPLATE (d)))
/* Instantiations of template member functions are never copy
functions. Note that member functions of templated classes are
represented as template functions internally, and we must
accept those as copy functions. */
return 0;
args = FUNCTION_FIRST_USER_PARMTYPE (d);
if (!args)
return 0;
arg_type = TREE_VALUE (args);
if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
{
/* Pass by value copy assignment operator. */
result = -1;
}
else if (TREE_CODE (arg_type) == REFERENCE_TYPE
&& TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
{
if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
result = 2;
}
else
return 0;
args = TREE_CHAIN (args);
if (args && args != void_list_node && !TREE_PURPOSE (args))
/* There are more non-optional args. */
return 0;
return result;
}
/* Remember any special properties of member function DECL. */
void grok_special_member_properties (decl)
tree decl;
{
if (!DECL_NONSTATIC_MEMBER_FUNCTION_P(decl))
; /* Not special. */
else if (DECL_CONSTRUCTOR_P (decl))
{
int ctor = copy_fn_p (decl);
if (ctor > 0)
{
/* [class.copy]
A non-template constructor for class X is a copy
constructor if its first parameter is of type X&, const
X&, volatile X& or const volatile X&, and either there
are no other parameters or else all other parameters have
default arguments. */
TYPE_HAS_INIT_REF (DECL_CONTEXT (decl)) = 1;
if (ctor > 1)
TYPE_HAS_CONST_INIT_REF (DECL_CONTEXT (decl)) = 1;
}
else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
TYPE_HAS_DEFAULT_CONSTRUCTOR (DECL_CONTEXT (decl)) = 1;
}
else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
{
/* [class.copy]
A non-template assignment operator for class X is a copy
assignment operator if its parameter is of type X, X&, const
X&, volatile X& or const volatile X&. */
int assop = copy_fn_p (decl);
if (assop)
{
TYPE_HAS_ASSIGN_REF (DECL_CONTEXT (decl)) = 1;
if (assop != 1)
TYPE_HAS_CONST_ASSIGN_REF (DECL_CONTEXT (decl)) = 1;
if (DECL_PURE_VIRTUAL_P (decl))
TYPE_HAS_ABSTRACT_ASSIGN_REF (DECL_CONTEXT (decl)) = 1;
}
}
}
/* Check a constructor DECL has the correct form. Complains
if the class has a constructor of the form X(X). */
int
grok_ctor_properties (ctype, decl)
tree ctype, decl;
{
int ctor_parm = copy_fn_p (decl);
if (ctor_parm < 0)
{
/* [class.copy]
A declaration of a constructor for a class X is ill-formed if
its first parameter is of type (optionally cv-qualified) X
and either there are no other parameters or else all other
parameters have default arguments.
We *don't* complain about member template instantiations that
have this form, though; they can occur as we try to decide
what constructor to use during overload resolution. Since
overload resolution will never prefer such a constructor to
the non-template copy constructor (which is either explicitly
or implicitly defined), there's no need to worry about their
existence. Theoretically, they should never even be
instantiated, but that's hard to forestall. */
error ("invalid constructor; you probably meant `%T (const %T&)'",
ctype, ctype);
SET_IDENTIFIER_ERROR_LOCUS (DECL_NAME (decl), ctype);
return 0;
}
return 1;
}
/* An operator with this code is unary, but can also be binary. */
static int
ambi_op_p (code)
enum tree_code code;
{
return (code == INDIRECT_REF
|| code == ADDR_EXPR
|| code == CONVERT_EXPR
|| code == NEGATE_EXPR
|| code == PREINCREMENT_EXPR
|| code == PREDECREMENT_EXPR);
}
/* An operator with this name can only be unary. */
static int
unary_op_p (code)
enum tree_code code;
{
return (code == TRUTH_NOT_EXPR
|| code == BIT_NOT_EXPR
|| code == COMPONENT_REF
|| code == TYPE_EXPR);
}
/* Do a little sanity-checking on how they declared their operator. */
void
grok_op_properties (decl, friendp)
tree decl;
int friendp;
{
tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
tree argtype;
int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
tree name = DECL_NAME (decl);
enum tree_code operator_code;
int arity;
/* Count the number of arguments. */
for (argtype = argtypes, arity = 0;
argtype && argtype != void_list_node;
argtype = TREE_CHAIN (argtype))
++arity;
if (current_class_type == NULL_TREE)
friendp = 1;
if (DECL_CONV_FN_P (decl))
operator_code = TYPE_EXPR;
else
do
{
#define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
if (ansi_opname (CODE) == name) \
{ \
operator_code = CODE; \
break; \
} \
else if (ansi_assopname (CODE) == name) \
{ \
operator_code = CODE; \
DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
break; \
}
#include "operators.def"
#undef DEF_OPERATOR
my_friendly_abort (20000527);
}
while (0);
my_friendly_assert (operator_code != LAST_CPLUS_TREE_CODE, 20000526);
SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
if (! friendp)
{
switch (operator_code)
{
case CALL_EXPR:
TYPE_OVERLOADS_CALL_EXPR (current_class_type) = 1;
break;
case ARRAY_REF:
TYPE_OVERLOADS_ARRAY_REF (current_class_type) = 1;
break;
case COMPONENT_REF:
case MEMBER_REF:
TYPE_OVERLOADS_ARROW (current_class_type) = 1;
break;
case NEW_EXPR:
TYPE_HAS_NEW_OPERATOR (current_class_type) = 1;
break;
case DELETE_EXPR:
TYPE_GETS_DELETE (current_class_type) |= 1;
break;
case VEC_NEW_EXPR:
TYPE_HAS_ARRAY_NEW_OPERATOR (current_class_type) = 1;
break;
case VEC_DELETE_EXPR:
TYPE_GETS_DELETE (current_class_type) |= 2;
break;
default:
break;
}
}
if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
{
/* When the compiler encounters the definition of A::operator new, it
doesn't look at the class declaration to find out if it's static. */
if (methodp)
revert_static_member_fn (decl);
TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
}
else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
{
if (methodp)
revert_static_member_fn (decl);
TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
}
else
{
/* An operator function must either be a non-static member function
or have at least one parameter of a class, a reference to a class,
an enumeration, or a reference to an enumeration. 13.4.0.6 */
if (! methodp || DECL_STATIC_FUNCTION_P (decl))
{
if (operator_code == TYPE_EXPR
|| operator_code == CALL_EXPR
|| operator_code == COMPONENT_REF
|| operator_code == ARRAY_REF
|| operator_code == NOP_EXPR)
error ("`%D' must be a nonstatic member function", decl);
else
{
tree p = argtypes;
if (DECL_STATIC_FUNCTION_P (decl))
error ("`%D' must be either a non-static member function or a non-member function", decl);
if (p)
for (; TREE_CODE (TREE_VALUE (p)) != VOID_TYPE ; p = TREE_CHAIN (p))
{
tree arg = TREE_VALUE (p);
if (TREE_CODE (arg) == REFERENCE_TYPE)
arg = TREE_TYPE (arg);
/* This lets bad template code slip through. */
if (IS_AGGR_TYPE (arg)
|| TREE_CODE (arg) == ENUMERAL_TYPE
|| TREE_CODE (arg) == TEMPLATE_TYPE_PARM
|| TREE_CODE (arg) == BOUND_TEMPLATE_TEMPLATE_PARM)
goto foundaggr;
}
error
("`%D' must have an argument of class or enumerated type",
decl);
foundaggr:
;
}
}
if (operator_code == CALL_EXPR)
return; /* No restrictions on args. */
if (IDENTIFIER_TYPENAME_P (name) && ! DECL_TEMPLATE_INFO (decl))
{
tree t = TREE_TYPE (name);
if (! friendp)
{
int ref = (TREE_CODE (t) == REFERENCE_TYPE);
const char *what = 0;
if (ref)
t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
if (TREE_CODE (t) == VOID_TYPE)
what = "void";
else if (t == current_class_type)
what = "the same type";
/* Don't force t to be complete here. */
else if (IS_AGGR_TYPE (t)
&& COMPLETE_TYPE_P (t)
&& DERIVED_FROM_P (t, current_class_type))
what = "a base class";
if (what)
warning ("conversion to %s%s will never use a type conversion operator",
ref ? "a reference to " : "", what);
}
}
if (operator_code == COND_EXPR)
{
/* 13.4.0.3 */
error ("ISO C++ prohibits overloading operator ?:");
}
else if (ambi_op_p (operator_code))
{
if (arity == 1)
/* We pick the one-argument operator codes by default, so
we don't have to change anything. */
;
else if (arity == 2)
{
/* If we thought this was a unary operator, we now know
it to be a binary operator. */
switch (operator_code)
{
case INDIRECT_REF:
operator_code = MULT_EXPR;
break;
case ADDR_EXPR:
operator_code = BIT_AND_EXPR;
break;
case CONVERT_EXPR:
operator_code = PLUS_EXPR;
break;
case NEGATE_EXPR:
operator_code = MINUS_EXPR;
break;
case PREINCREMENT_EXPR:
operator_code = POSTINCREMENT_EXPR;
break;
case PREDECREMENT_EXPR:
operator_code = POSTDECREMENT_EXPR;
break;
default:
my_friendly_abort (20000527);
}
SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
if ((operator_code == POSTINCREMENT_EXPR
|| operator_code == POSTDECREMENT_EXPR)
&& ! processing_template_decl
&& ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
{
if (methodp)
error ("postfix `%D' must take `int' as its argument",
decl);
else
error
("postfix `%D' must take `int' as its second argument",
decl);
}
}
else
{
if (methodp)
error ("`%D' must take either zero or one argument", decl);
else
error ("`%D' must take either one or two arguments", decl);
}
/* More Effective C++ rule 6. */
if (warn_ecpp
&& (operator_code == POSTINCREMENT_EXPR
|| operator_code == POSTDECREMENT_EXPR
|| operator_code == PREINCREMENT_EXPR
|| operator_code == PREDECREMENT_EXPR))
{
tree arg = TREE_VALUE (argtypes);
tree ret = TREE_TYPE (TREE_TYPE (decl));
if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
arg = TREE_TYPE (arg);
arg = TYPE_MAIN_VARIANT (arg);
if (operator_code == PREINCREMENT_EXPR
|| operator_code == PREDECREMENT_EXPR)
{
if (TREE_CODE (ret) != REFERENCE_TYPE
|| !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
arg))
warning ("prefix `%D' should return `%T'", decl,
build_reference_type (arg));
}
else
{
if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
warning ("postfix `%D' should return `%T'", decl, arg);
}
}
}
else if (unary_op_p (operator_code))
{
if (arity != 1)
{
if (methodp)
error ("`%D' must take `void'", decl);
else
error ("`%D' must take exactly one argument", decl);
}
}
else /* if (binary_op_p (operator_code)) */
{
if (arity != 2)
{
if (methodp)
error ("`%D' must take exactly one argument", decl);
else
error ("`%D' must take exactly two arguments", decl);
}
/* More Effective C++ rule 7. */
if (warn_ecpp
&& (operator_code == TRUTH_ANDIF_EXPR
|| operator_code == TRUTH_ORIF_EXPR
|| operator_code == COMPOUND_EXPR))
warning ("user-defined `%D' always evaluates both arguments",
decl);
}
/* Effective C++ rule 23. */
if (warn_ecpp
&& arity == 2
&& (operator_code == PLUS_EXPR
|| operator_code == MINUS_EXPR
|| operator_code == TRUNC_DIV_EXPR
|| operator_code == MULT_EXPR)
&& TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
warning ("`%D' should return by value", decl);
/* [over.oper]/8 */
for (; argtypes && argtypes != void_list_node;
argtypes = TREE_CHAIN (argtypes))
if (TREE_PURPOSE (argtypes))
{
TREE_PURPOSE (argtypes) = NULL_TREE;
if (operator_code == POSTINCREMENT_EXPR
|| operator_code == POSTDECREMENT_EXPR)
{
if (pedantic)
pedwarn ("`%D' cannot have default arguments", decl);
}
else
error ("`%D' cannot have default arguments", decl);
}
}
}
static const char *
tag_name (code)
enum tag_types code;
{
switch (code)
{
case record_type:
return "struct";
case class_type:
return "class";
case union_type:
return "union ";
case enum_type:
return "enum";
default:
my_friendly_abort (981122);
}
}
/* Get the struct, enum or union (CODE says which) with tag NAME.
Define the tag as a forward-reference if it is not defined.
C++: If a class derivation is given, process it here, and report
an error if multiple derivation declarations are not identical.
If this is a definition, come in through xref_tag and only look in
the current frame for the name (since C++ allows new names in any
scope.) */
tree
xref_tag (code_type_node, name, globalize)
tree code_type_node;
tree name;
int globalize;
{
enum tag_types tag_code;
enum tree_code code;
register tree ref, t;
struct binding_level *b = current_binding_level;
int got_type = 0;
tree attributes = NULL_TREE;
tree context = NULL_TREE;
/* If we are called from the parser, code_type_node will sometimes be a
TREE_LIST. This indicates that the user wrote
"class __attribute__ ((foo)) bar". Extract the attributes so we can
use them later. */
if (TREE_CODE (code_type_node) == TREE_LIST)
{
attributes = TREE_PURPOSE (code_type_node);
code_type_node = TREE_VALUE (code_type_node);
}
tag_code = (enum tag_types) tree_low_cst (code_type_node, 1);
switch (tag_code)
{
case record_type:
case class_type:
code = RECORD_TYPE;
break;
case union_type:
code = UNION_TYPE;
break;
case enum_type:
code = ENUMERAL_TYPE;
break;
default:
my_friendly_abort (18);
}
/* If a cross reference is requested, look up the type
already defined for this tag and return it. */
if (TYPE_P (name))
{
t = name;
name = TYPE_IDENTIFIER (t);
got_type = 1;
}
else
t = IDENTIFIER_TYPE_VALUE (name);
/* Warn about 'friend struct Inherited;' doing the wrong thing. */
if (t && globalize && TREE_CODE (t) == TYPENAME_TYPE)
{
static int explained;
tree shadowed;
warning ("`%s %T' declares a new type at namespace scope",
tag_name (tag_code), name);
if (!explained++)
warning (" names from dependent base classes are not visible to unqualified name lookup - to refer to the inherited type, say `%s %T::%T'",
tag_name (tag_code),
constructor_name (current_class_type),
TYPE_IDENTIFIER (t));
/* We need to remove the class scope binding for the
TYPENAME_TYPE as otherwise poplevel_class gets confused. */
for (shadowed = b->class_shadowed;
shadowed;
shadowed = TREE_CHAIN (shadowed))
if (TREE_TYPE (shadowed) == TYPE_NAME (t))
{
TREE_PURPOSE (shadowed) = NULL_TREE;
break;
}
}
if (t && TREE_CODE (t) != code && TREE_CODE (t) != TEMPLATE_TYPE_PARM
&& TREE_CODE (t) != BOUND_TEMPLATE_TEMPLATE_PARM)
t = NULL_TREE;
if (! globalize)
{
/* If we know we are defining this tag, only look it up in
this scope and don't try to find it as a type. */
ref = lookup_tag (code, name, b, 1);
}
else
{
if (t)
{
/* [dcl.type.elab] If the identifier resolves to a
typedef-name or a template type-parameter, the
elaborated-type-specifier is ill-formed. */
if (t != TYPE_MAIN_VARIANT (t)
|| (CLASS_TYPE_P (t) && TYPE_WAS_ANONYMOUS (t)))
pedwarn ("using typedef-name `%D' after `%s'",
TYPE_NAME (t), tag_name (tag_code));
else if (TREE_CODE (t) == TEMPLATE_TYPE_PARM)
error ("using template type parameter `%T' after `%s'",
t, tag_name (tag_code));
ref = t;
}
else
ref = lookup_tag (code, name, b, 0);
if (! ref)
{
/* Try finding it as a type declaration. If that wins,
use it. */
ref = lookup_name (name, 1);
if (ref != NULL_TREE
&& processing_template_decl
&& DECL_CLASS_TEMPLATE_P (ref)
&& template_class_depth (current_class_type) == 0)
/* Since GLOBALIZE is true, we're declaring a global
template, so we want this type. */
ref = DECL_TEMPLATE_RESULT (ref);
if (ref && TREE_CODE (ref) == TYPE_DECL
&& TREE_CODE (TREE_TYPE (ref)) == code)
ref = TREE_TYPE (ref);
else
ref = NULL_TREE;
}
if (ref && current_class_type
&& template_class_depth (current_class_type)
&& PROCESSING_REAL_TEMPLATE_DECL_P ())
{
/* Since GLOBALIZE is non-zero, we are not looking at a
definition of this tag. Since, in addition, we are currently
processing a (member) template declaration of a template
class, we must be very careful; consider:
template <class X>
struct S1
template <class U>
struct S2
{ template <class V>
friend struct S1; };
Here, the S2::S1 declaration should not be confused with the
outer declaration. In particular, the inner version should
have a template parameter of level 2, not level 1. This
would be particularly important if the member declaration
were instead:
template <class V = U> friend struct S1;
say, when we should tsubst into `U' when instantiating
S2. On the other hand, when presented with:
template <class T>
struct S1 {
template <class U>
struct S2 {};
template <class U>
friend struct S2;
};
we must find the inner binding eventually. We
accomplish this by making sure that the new type we
create to represent this declaration has the right
TYPE_CONTEXT. */
context = TYPE_CONTEXT (ref);
ref = NULL_TREE;
}
}
if (! ref)
{
/* If no such tag is yet defined, create a forward-reference node
and record it as the "definition".
When a real declaration of this type is found,
the forward-reference will be altered into a real type. */
if (code == ENUMERAL_TYPE)
{
error ("use of enum `%#D' without previous declaration", name);
ref = make_node (ENUMERAL_TYPE);
/* Give the type a default layout like unsigned int
to avoid crashing if it does not get defined. */
TYPE_MODE (ref) = TYPE_MODE (unsigned_type_node);
TYPE_ALIGN (ref) = TYPE_ALIGN (unsigned_type_node);
TYPE_USER_ALIGN (ref) = 0;
TREE_UNSIGNED (ref) = 1;
TYPE_PRECISION (ref) = TYPE_PRECISION (unsigned_type_node);
TYPE_MIN_VALUE (ref) = TYPE_MIN_VALUE (unsigned_type_node);
TYPE_MAX_VALUE (ref) = TYPE_MAX_VALUE (unsigned_type_node);
/* Enable us to recognize when a type is created in class context.
To do nested classes correctly, this should probably be cleared
out when we leave this classes scope. Currently this in only
done in `start_enum'. */
pushtag (name, ref, globalize);
}
else
{
struct binding_level *old_b = class_binding_level;
ref = make_aggr_type (code);
TYPE_CONTEXT (ref) = context;
#ifdef NONNESTED_CLASSES
/* Class types don't nest the way enums do. */
class_binding_level = (struct binding_level *)0;
#endif
pushtag (name, ref, globalize);
class_binding_level = old_b;
}
}
else
{
if (!globalize && processing_template_decl && IS_AGGR_TYPE (ref))
redeclare_class_template (ref, current_template_parms);
}
/* Until the type is defined, tentatively accept whatever
structure tag the user hands us. */
if (!COMPLETE_TYPE_P (ref)
&& ref != current_class_type
/* Have to check this, in case we have contradictory tag info. */
&& IS_AGGR_TYPE_CODE (TREE_CODE (ref)))
{
if (tag_code == class_type)
CLASSTYPE_DECLARED_CLASS (ref) = 1;
else if (tag_code == record_type)
CLASSTYPE_DECLARED_CLASS (ref) = 0;
}
TREE_TYPE (ref) = attributes;
return ref;
}
tree
xref_tag_from_type (old, id, globalize)
tree old, id;
int globalize;
{
tree code_type_node;
if (TREE_CODE (old) == RECORD_TYPE)
code_type_node = (CLASSTYPE_DECLARED_CLASS (old)
? class_type_node : record_type_node);
else
code_type_node = union_type_node;
if (id == NULL_TREE)
id = TYPE_IDENTIFIER (old);
return xref_tag (code_type_node, id, globalize);
}
/* REF is a type (named NAME), for which we have just seen some
baseclasses. BINFO is a list of those baseclasses; the
TREE_PURPOSE is an access_* node, and the TREE_VALUE is the type of
the base-class. CODE_TYPE_NODE indicates whether REF is a class,
struct, or union. */
void
xref_basetypes (code_type_node, name, ref, binfo)
tree code_type_node;
tree name, ref;
tree binfo;
{
/* In the declaration `A : X, Y, ... Z' we mark all the types
(A, X, Y, ..., Z) so we can check for duplicates. */
tree binfos;
tree base;
int i, len;
enum tag_types tag_code;
/* If we are called from the parser, code_type_node will sometimes be a
TREE_LIST. This indicates that the user wrote
"class __attribute__ ((foo)) bar". Extract the attributes so that
tree_low_cst doesn't crash. */
if (TREE_CODE (code_type_node) == TREE_LIST)
code_type_node = TREE_VALUE (code_type_node);
tag_code = (enum tag_types) tree_low_cst (code_type_node, 1);
if (tag_code == union_type)
{
error ("derived union `%T' invalid", ref);
return;
}
len = list_length (binfo);
/* First, make sure that any templates in base-classes are
instantiated. This ensures that if we call ourselves recursively
we do not get confused about which classes are marked and which
are not. */
for (base = binfo; base; base = TREE_CHAIN (base))
complete_type (TREE_VALUE (base));
SET_CLASSTYPE_MARKED (ref);
BINFO_BASETYPES (TYPE_BINFO (ref)) = binfos = make_tree_vec (len);
for (i = 0; binfo; binfo = TREE_CHAIN (binfo))
{
/* The base of a derived struct is public by default. */
int via_public
= (TREE_PURPOSE (binfo) == access_public_node
|| TREE_PURPOSE (binfo) == access_public_virtual_node
|| (tag_code != class_type
&& (TREE_PURPOSE (binfo) == access_default_node
|| TREE_PURPOSE (binfo) == access_default_virtual_node)));
int via_protected
= (TREE_PURPOSE (binfo) == access_protected_node
|| TREE_PURPOSE (binfo) == access_protected_virtual_node);
int via_virtual
= (TREE_PURPOSE (binfo) == access_private_virtual_node
|| TREE_PURPOSE (binfo) == access_protected_virtual_node
|| TREE_PURPOSE (binfo) == access_public_virtual_node
|| TREE_PURPOSE (binfo) == access_default_virtual_node);
tree basetype = TREE_VALUE (binfo);
tree base_binfo;
if (basetype && TREE_CODE (basetype) == TYPE_DECL)
basetype = TREE_TYPE (basetype);
if (!basetype
|| (TREE_CODE (basetype) != RECORD_TYPE
&& TREE_CODE (basetype) != TYPENAME_TYPE
&& TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
&& TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM))
{
error ("base type `%T' fails to be a struct or class type",
TREE_VALUE (binfo));
continue;
}
GNU_xref_hier (name, basetype, via_public, via_virtual, 0);
/* This code replaces similar code in layout_basetypes.
We put the complete_type first for implicit `typename'. */
if (!COMPLETE_TYPE_P (basetype)
&& ! (current_template_parms && uses_template_parms (basetype)))
{
error ("base class `%T' has incomplete type", basetype);
continue;
}
else
{
if (CLASSTYPE_MARKED (basetype))
{
if (basetype == ref)
error ("recursive type `%T' undefined", basetype);
else
error ("duplicate base type `%T' invalid", basetype);
continue;
}
if (TYPE_FOR_JAVA (basetype)
&& (current_lang_depth () == 0))
TYPE_FOR_JAVA (ref) = 1;
/* Note that the BINFO records which describe individual
inheritances are *not* shared in the lattice! They
cannot be shared because a given baseclass may be
inherited with different `accessibility' by different
derived classes. (Each BINFO record describing an
individual inheritance contains flags which say what
the `accessibility' of that particular inheritance is.) */
base_binfo
= make_binfo (size_zero_node, basetype,
CLASS_TYPE_P (basetype)
? TYPE_BINFO_VTABLE (basetype) : NULL_TREE,
CLASS_TYPE_P (basetype)
? TYPE_BINFO_VIRTUALS (basetype) : NULL_TREE);
TREE_VEC_ELT (binfos, i) = base_binfo;
TREE_VIA_PUBLIC (base_binfo) = via_public;
TREE_VIA_PROTECTED (base_binfo) = via_protected;
TREE_VIA_VIRTUAL (base_binfo) = via_virtual;
BINFO_INHERITANCE_CHAIN (base_binfo) = TYPE_BINFO (ref);
/* We need to unshare the binfos now so that lookups during class
definition work. */
unshare_base_binfos (base_binfo);
SET_CLASSTYPE_MARKED (basetype);
/* We are free to modify these bits because they are meaningless
at top level, and BASETYPE is a top-level type. */
if (via_virtual || TYPE_USES_VIRTUAL_BASECLASSES (basetype))
{
TYPE_USES_VIRTUAL_BASECLASSES (ref) = 1;
/* Converting to a virtual base class requires looking
up the offset of the virtual base. */
TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (ref) = 1;
}
if (CLASS_TYPE_P (basetype))
{
TYPE_HAS_NEW_OPERATOR (ref)
|= TYPE_HAS_NEW_OPERATOR (basetype);
TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
|= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
/* If the base-class uses multiple inheritance, so do we. */
TYPE_USES_MULTIPLE_INHERITANCE (ref)
|= TYPE_USES_MULTIPLE_INHERITANCE (basetype);
/* Likewise, if converting to a base of the base may require
code, then we may need to generate code to convert to a
base as well. */
TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (ref)
|= TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (basetype);
}
i += 1;
}
}
if (i)
TREE_VEC_LENGTH (binfos) = i;
else
BINFO_BASETYPES (TYPE_BINFO (ref)) = NULL_TREE;
if (i > 1)
{
TYPE_USES_MULTIPLE_INHERITANCE (ref) = 1;
/* If there is more than one non-empty they cannot be at the same
address. */
TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (ref) = 1;
}
/* Unmark all the types. */
while (--i >= 0)
CLEAR_CLASSTYPE_MARKED (BINFO_TYPE (TREE_VEC_ELT (binfos, i)));
CLEAR_CLASSTYPE_MARKED (ref);
/* Now that we know all the base-classes, set up the list of virtual
bases. */
get_vbase_types (ref);
}
/* Begin compiling the definition of an enumeration type.
NAME is its name (or null if anonymous).
Returns the type object, as yet incomplete.
Also records info about it so that build_enumerator
may be used to declare the individual values as they are read. */
tree
start_enum (name)
tree name;
{
register tree enumtype = NULL_TREE;
struct binding_level *b = current_binding_level;
/* If this is the real definition for a previous forward reference,
fill in the contents in the same object that used to be the
forward reference. */
if (name != NULL_TREE)
enumtype = lookup_tag (ENUMERAL_TYPE, name, b, 1);
if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
{
error ("multiple definition of `%#T'", enumtype);
cp_error_at ("previous definition here", enumtype);
/* Clear out TYPE_VALUES, and start again. */
TYPE_VALUES (enumtype) = NULL_TREE;
}
else
{
enumtype = make_node (ENUMERAL_TYPE);
pushtag (name, enumtype, 0);
}
if (current_class_type)
TREE_ADDRESSABLE (b->tags) = 1;
GNU_xref_decl (current_function_decl, enumtype);
return enumtype;
}
/* After processing and defining all the values of an enumeration type,
install their decls in the enumeration type and finish it off.
ENUMTYPE is the type object and VALUES a list of name-value pairs. */
void
finish_enum (enumtype)
tree enumtype;
{
tree pair;
tree minnode;
tree maxnode;
tree t;
bool unsignedp;
int lowprec;
int highprec;
int precision;
/* We built up the VALUES in reverse order. */
TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
/* [dcl.enum]
Following the closing brace of an enum-specifier, each
enumerator has the type of its enumeration. Prior to the
closing brace, the type of each enumerator is the type of
its initializing value. */
for (pair = TYPE_VALUES (enumtype); pair; pair = TREE_CHAIN (pair))
TREE_TYPE (TREE_VALUE (pair)) = enumtype;
/* For a enum defined in a template, all further processing is
postponed until the template is instantiated. */
if (processing_template_decl)
{
tree scope = current_scope ();
if (scope && TREE_CODE (scope) == FUNCTION_DECL)
add_stmt (build_min (TAG_DEFN, enumtype));
return;
}
/* Figure out what the minimum and maximum values of the enumerators
are. */
if (TYPE_VALUES (enumtype))
{
minnode = maxnode = NULL_TREE;
for (pair = TYPE_VALUES (enumtype);
pair;
pair = TREE_CHAIN (pair))
{
tree value;
value = DECL_INITIAL (TREE_VALUE (pair));
if (!minnode)
minnode = maxnode = value;
else if (tree_int_cst_lt (maxnode, value))
maxnode = value;
else if (tree_int_cst_lt (value, minnode))
minnode = value;
}
}
else
minnode = maxnode = integer_zero_node;
/* Compute the number of bits require to represent all values of the
enumeration. We must do this before the type of MINNODE and
MAXNODE are transformed, since min_precision relies on the
TREE_TYPE of the value it is passed. */
unsignedp = tree_int_cst_sgn (minnode) >= 0;
lowprec = min_precision (minnode, unsignedp);
highprec = min_precision (maxnode, unsignedp);
precision = MAX (lowprec, highprec);
/* Set the TREE_TYPE for the values as well. That's so that when we
call decl_constant_value we get an entity of the right type (but
with the constant value). In addition, transform the TYPE_VALUES
list to contain the values, rather than the CONST_DECLs for them. */
for (pair = TYPE_VALUES (enumtype); pair; pair = TREE_CHAIN (pair))
{
tree value = DECL_INITIAL (TREE_VALUE (pair));
TREE_TYPE (value) = enumtype;
TREE_VALUE (pair) = value;
}
/* Set TYPE_MIN_VALUE and TYPE_MAX_VALUE according to `precision'. */
TYPE_SIZE (enumtype) = NULL_TREE;
TYPE_PRECISION (enumtype) = precision;
if (unsignedp)
fixup_unsigned_type (enumtype);
else
fixup_signed_type (enumtype);
if (flag_short_enums || (precision > TYPE_PRECISION (integer_type_node)))
/* Use the width of the narrowest normal C type which is wide
enough. */
TYPE_PRECISION (enumtype) = TYPE_PRECISION (type_for_size
(precision, 1));
else
TYPE_PRECISION (enumtype) = TYPE_PRECISION (integer_type_node);
TYPE_SIZE (enumtype) = NULL_TREE;
layout_type (enumtype);
/* Fix up all variant types of this enum type. */
for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
{
TYPE_VALUES (t) = TYPE_VALUES (enumtype);
TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
TYPE_SIZE (t) = TYPE_SIZE (enumtype);
TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
TYPE_MODE (t) = TYPE_MODE (enumtype);
TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
TREE_UNSIGNED (t) = TREE_UNSIGNED (enumtype);
}
/* Finish debugging output for this type. */
rest_of_type_compilation (enumtype, namespace_bindings_p ());
}
/* Build and install a CONST_DECL for an enumeration constant of the
enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
Assignment of sequential values by default is handled here. */
void
build_enumerator (name, value, enumtype)
tree name;
tree value;
tree enumtype;
{
tree decl;
tree context;
tree type;
tree values;
/* Remove no-op casts from the value. */
if (value)
STRIP_TYPE_NOPS (value);
if (! processing_template_decl)
{
/* Validate and default VALUE. */
if (value != NULL_TREE)
{
value = decl_constant_value (value);
if (TREE_CODE (value) == INTEGER_CST)
{
value = default_conversion (value);
constant_expression_warning (value);
}
else
{
error ("enumerator value for `%D' not integer constant", name);
value = NULL_TREE;
}
}
/* Default based on previous value. */
if (value == NULL_TREE && ! processing_template_decl)
{
tree prev_value;
if (TYPE_VALUES (enumtype))
{
/* The next value is the previous value ... */
prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
/* ... plus one. */
value = cp_build_binary_op (PLUS_EXPR,
prev_value,
integer_one_node);
if (tree_int_cst_lt (value, prev_value))
error ("overflow in enumeration values at `%D'", name);
}
else
value = integer_zero_node;
}
/* Remove no-op casts from the value. */
if (value)
STRIP_TYPE_NOPS (value);
#if 0
/* To fix MAX_VAL enum consts. (bkoz) */
TREE_TYPE (value) = integer_type_node;
#endif
}
/* We always have to copy here; not all INTEGER_CSTs are unshared.
Even in other cases, we will later (in finish_enum) be setting
the type of VALUE. But, we don't need to make a copy if this
VALUE is one of the enumeration constants for this same
enumeration type. */
for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
if (TREE_VALUE (values) == value)
break;
/* If we didn't break out of the loop, then we do need a copy. */
if (!values && value)
value = copy_node (value);
/* C++ associates enums with global, function, or class declarations. */
context = current_scope ();
/* Build the actual enumeration constant. Note that the enumeration
constants have the type of their initializers until the
enumeration is complete:
[ dcl.enum ]
Following the closing brace of an enum-specifier, each enumer-
ator has the type of its enumeration. Prior to the closing
brace, the type of each enumerator is the type of its
initializing value.
In finish_enum we will reset the type. Of course, if we're
processing a template, there may be no value. */
type = value ? TREE_TYPE (value) : NULL_TREE;
if (context && context == current_class_type)
/* This enum declaration is local to the class. We need the full
lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
decl = build_lang_decl (CONST_DECL, name, type);
else
/* It's a global enum, or it's local to a function. (Note local to
a function could mean local to a class method. */
decl = build_decl (CONST_DECL, name, type);
DECL_CONTEXT (decl) = FROB_CONTEXT (context);
DECL_INITIAL (decl) = value;
TREE_READONLY (decl) = 1;
if (context && context == current_class_type)
/* In something like `struct S { enum E { i = 7 }; };' we put `i'
on the TYPE_FIELDS list for `S'. (That's so that you can say
things like `S::i' later.) */
finish_member_declaration (decl);
else
{
pushdecl (decl);
GNU_xref_decl (current_function_decl, decl);
}
/* Add this enumeration constant to the list for this type. */
TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
}
/* We're defining DECL. Make sure that it's type is OK. */
static void
check_function_type (decl, current_function_parms)
tree decl;
tree current_function_parms;
{
tree fntype = TREE_TYPE (decl);
tree return_type = complete_type (TREE_TYPE (fntype));
/* In a function definition, arg types must be complete. */
require_complete_types_for_parms (current_function_parms);
if (!COMPLETE_OR_VOID_TYPE_P (return_type))
{
error ("return type `%#T' is incomplete", TREE_TYPE (fntype));
/* Make it return void instead, but don't change the
type of the DECL_RESULT, in case we have a named return value. */
if (TREE_CODE (fntype) == METHOD_TYPE)
{
tree ctype = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (fntype)));
TREE_TYPE (decl)
= build_cplus_method_type (ctype,
void_type_node,
FUNCTION_ARG_CHAIN (decl));
}
else
TREE_TYPE (decl)
= build_function_type (void_type_node,
TYPE_ARG_TYPES (TREE_TYPE (decl)));
TREE_TYPE (decl)
= build_exception_variant (fntype,
TYPE_RAISES_EXCEPTIONS (fntype));
}
else
abstract_virtuals_error (decl, TREE_TYPE (fntype));
}
/* Create the FUNCTION_DECL for a function definition.
DECLSPECS and DECLARATOR are the parts of the declaration;
they describe the function's name and the type it returns,
but twisted together in a fashion that parallels the syntax of C.
FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
DECLARATOR is really the DECL for the function we are about to
process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
indicating that the function is an inline defined in-class.
This function creates a binding context for the function body
as well as setting up the FUNCTION_DECL in current_function_decl.
Returns 1 on success. If the DECLARATOR is not suitable for a function
(it defines a datum instead), we return 0, which tells
yyparse to report a parse error.
For C++, we must first check whether that datum makes any sense.
For example, "class A local_a(1,2);" means that variable local_a
is an aggregate of type A, which should have a constructor
applied to it with the argument list [1, 2]. */
int
start_function (declspecs, declarator, attrs, flags)
tree declspecs, declarator, attrs;
int flags;
{
tree decl1;
tree ctype = NULL_TREE;
tree fntype;
tree restype;
extern int have_extern_spec;
extern int used_extern_spec;
int doing_friend = 0;
struct binding_level *bl;
tree current_function_parms;
/* Sanity check. */
my_friendly_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE, 160);
my_friendly_assert (TREE_CHAIN (void_list_node) == NULL_TREE, 161);
/* This should only be done once on the top most decl. */
if (have_extern_spec && !used_extern_spec)
{
declspecs = tree_cons (NULL_TREE, get_identifier ("extern"), declspecs);
used_extern_spec = 1;
}
if (flags & SF_PRE_PARSED)
{
decl1 = declarator;
fntype = TREE_TYPE (decl1);
if (TREE_CODE (fntype) == METHOD_TYPE)
ctype = TYPE_METHOD_BASETYPE (fntype);
/* ISO C++ 11.4/5. A friend function defined in a class is in
the (lexical) scope of the class in which it is defined. */
if (!ctype && DECL_FRIEND_P (decl1))
{
ctype = DECL_FRIEND_CONTEXT (decl1);
/* CTYPE could be null here if we're dealing with a template;
for example, `inline friend float foo()' inside a template
will have no CTYPE set. */
if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
ctype = NULL_TREE;
else
doing_friend = 1;
}
last_function_parms = DECL_ARGUMENTS (decl1);
}
else
{
decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, NULL);
/* If the declarator is not suitable for a function definition,
cause a syntax error. */
if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL) return 0;
fntype = TREE_TYPE (decl1);
restype = TREE_TYPE (fntype);
if (CLASS_TYPE_P (restype) && !CLASSTYPE_GOT_SEMICOLON (restype))
{
error ("semicolon missing after declaration of `%#T'", restype);
shadow_tag (build_tree_list (NULL_TREE, restype));
CLASSTYPE_GOT_SEMICOLON (restype) = 1;
if (TREE_CODE (fntype) == FUNCTION_TYPE)
fntype = build_function_type (integer_type_node,
TYPE_ARG_TYPES (fntype));
else
fntype = build_cplus_method_type (build_type_variant (TYPE_METHOD_BASETYPE (fntype), TREE_READONLY (decl1), TREE_SIDE_EFFECTS (decl1)),
integer_type_node,
TYPE_ARG_TYPES (fntype));
TREE_TYPE (decl1) = fntype;
}
if (TREE_CODE (fntype) == METHOD_TYPE)
ctype = TYPE_METHOD_BASETYPE (fntype);
else if (DECL_MAIN_P (decl1))
{
/* If this doesn't return integer_type, complain. */
if (TREE_TYPE (TREE_TYPE (decl1)) != integer_type_node)
{
if (pedantic || warn_return_type)
pedwarn ("return type for `main' changed to `int'");
TREE_TYPE (decl1) = fntype = default_function_type;
}
}
}
if (DECL_DECLARED_INLINE_P (decl1)
&& lookup_attribute ("noinline", attrs))
warning_with_decl (decl1,
"inline function `%s' given attribute noinline");
if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
/* This is a constructor, we must ensure that any default args
introduced by this definition are propagated to the clones
now. The clones are used directly in overload resolution. */
adjust_clone_args (decl1);
/* Sometimes we don't notice that a function is a static member, and
build a METHOD_TYPE for it. Fix that up now. */
if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
&& TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
{
revert_static_member_fn (decl1);
last_function_parms = TREE_CHAIN (last_function_parms);
ctype = NULL_TREE;
}
/* Warn if function was previously implicitly declared
(but not if we warned then). */
if (! warn_implicit
&& IDENTIFIER_IMPLICIT_DECL (DECL_NAME (decl1)) != NULL_TREE)
cp_warning_at ("`%D' implicitly declared before its definition", IDENTIFIER_IMPLICIT_DECL (DECL_NAME (decl1)));
/* Set up current_class_type, and enter the scope of the class, if
appropriate. */
if (ctype)
push_nested_class (ctype, 1);
else if (DECL_STATIC_FUNCTION_P (decl1))
push_nested_class (DECL_CONTEXT (decl1), 2);
/* Now that we have entered the scope of the class, we must restore
the bindings for any template parameters surrounding DECL1, if it
is an inline member template. (Order is important; consider the
case where a template parameter has the same name as a field of
the class.) It is not until after this point that
PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
if (flags & SF_INCLASS_INLINE)
maybe_begin_member_template_processing (decl1);
/* Effective C++ rule 15. */
if (warn_ecpp
&& DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
&& TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
warning ("`operator=' should return a reference to `*this'");
/* Make the init_value nonzero so pushdecl knows this is not tentative.
error_mark_node is replaced below (in poplevel) with the BLOCK. */
if (!DECL_INITIAL (decl1))
DECL_INITIAL (decl1) = error_mark_node;
/* This function exists in static storage.
(This does not mean `static' in the C sense!) */
TREE_STATIC (decl1) = 1;
/* We must call push_template_decl after current_class_type is set
up. (If we are processing inline definitions after exiting a
class scope, current_class_type will be NULL_TREE until set above
by push_nested_class.) */
if (processing_template_decl)
decl1 = push_template_decl (decl1);
/* We are now in the scope of the function being defined. */
current_function_decl = decl1;
/* Save the parm names or decls from this function's declarator
where store_parm_decls will find them. */
current_function_parms = last_function_parms;
/* Make sure the parameter and return types are reasonable. When
you declare a function, these types can be incomplete, but they
must be complete when you define the function. */
if (! processing_template_decl)
check_function_type (decl1, current_function_parms);
/* Build the return declaration for the function. */
restype = TREE_TYPE (fntype);
if (!processing_template_decl)
{
if (!DECL_RESULT (decl1))
{
DECL_RESULT (decl1)
= build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
c_apply_type_quals_to_decl (cp_type_quals (restype),
DECL_RESULT (decl1));
}
}
else
/* Just use `void'. Nobody will ever look at this anyhow. */
DECL_RESULT (decl1) = build_decl (RESULT_DECL, 0, void_type_node);
/* Initialize RTL machinery. We cannot do this until
CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
even when processing a template; this is how we get
CFUN set up, and our per-function variables initialized.
FIXME factor out the non-RTL stuff. */
bl = current_binding_level;
init_function_start (decl1, input_filename, lineno);
current_binding_level = bl;
/* Even though we're inside a function body, we still don't want to
call expand_expr to calculate the size of a variable-sized array.
We haven't necessarily assigned RTL to all variables yet, so it's
not safe to try to expand expressions involving them. */
immediate_size_expand = 0;
cfun->x_dont_save_pending_sizes_p = 1;
/* Start the statement-tree, start the tree now. */
begin_stmt_tree (&DECL_SAVED_TREE (decl1));
/* Let the user know we're compiling this function. */
announce_function (decl1);
/* Record the decl so that the function name is defined.
If we already have a decl for this name, and it is a FUNCTION_DECL,
use the old decl. */
if (!processing_template_decl && !(flags & SF_PRE_PARSED))
{
/* A specialization is not used to guide overload resolution. */
if (!DECL_TEMPLATE_SPECIALIZATION (decl1)
&& ! DECL_FUNCTION_MEMBER_P (decl1))
decl1 = pushdecl (decl1);
else
{
/* We need to set the DECL_CONTEXT. */
if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
/* And make sure we have enough default args. */
check_default_args (decl1);
}
fntype = TREE_TYPE (decl1);
}
/* Reset these in case the call to pushdecl changed them. */
current_function_decl = decl1;
cfun->decl = decl1;
/* If we are (erroneously) defining a function that we have already
defined before, wipe out what we knew before. */
if (!DECL_PENDING_INLINE_P (decl1)
&& DECL_SAVED_FUNCTION_DATA (decl1))
{
free (DECL_SAVED_FUNCTION_DATA (decl1));
DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
}
if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
{
/* We know that this was set up by `grokclassfn'. We do not
wait until `store_parm_decls', since evil parse errors may
never get us to that point. Here we keep the consistency
between `current_class_type' and `current_class_ptr'. */
tree t = DECL_ARGUMENTS (decl1);
my_friendly_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL,
162);
my_friendly_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE,
19990811);
cp_function_chain->x_current_class_ref
= build_indirect_ref (t, NULL);
cp_function_chain->x_current_class_ptr = t;
/* Constructors and destructors need to know whether they're "in
charge" of initializing virtual base classes. */
t = TREE_CHAIN (t);
if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
{
current_in_charge_parm = t;
t = TREE_CHAIN (t);
}
if (DECL_HAS_VTT_PARM_P (decl1))
{
if (DECL_NAME (t) != vtt_parm_identifier)
abort ();
current_vtt_parm = t;
}
}
if (DECL_INTERFACE_KNOWN (decl1))
{
tree ctx = decl_function_context (decl1);
if (DECL_NOT_REALLY_EXTERN (decl1))
DECL_EXTERNAL (decl1) = 0;
if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
&& TREE_PUBLIC (ctx))
/* This is a function in a local class in an extern inline
function. */
comdat_linkage (decl1);
}
/* If this function belongs to an interface, it is public.
If it belongs to someone else's interface, it is also external.
This only affects inlines and template instantiations. */
else if (interface_unknown == 0
&& (! DECL_TEMPLATE_INSTANTIATION (decl1)
|| flag_alt_external_templates))
{
if (DECL_DECLARED_INLINE_P (decl1)
|| DECL_TEMPLATE_INSTANTIATION (decl1)
|| processing_template_decl)
{
DECL_EXTERNAL (decl1)
= (interface_only
|| (DECL_DECLARED_INLINE_P (decl1)
&& ! flag_implement_inlines
&& !DECL_VINDEX (decl1)));
/* For WIN32 we also want to put these in linkonce sections. */
maybe_make_one_only (decl1);
}
else
DECL_EXTERNAL (decl1) = 0;
DECL_NOT_REALLY_EXTERN (decl1) = 0;
DECL_INTERFACE_KNOWN (decl1) = 1;
}
else if (interface_unknown && interface_only
&& (! DECL_TEMPLATE_INSTANTIATION (decl1)
|| flag_alt_external_templates))
{
/* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
interface, we will have interface_only set but not
interface_known. In that case, we don't want to use the normal
heuristics because someone will supply a #pragma implementation
elsewhere, and deducing it here would produce a conflict. */
comdat_linkage (decl1);
DECL_EXTERNAL (decl1) = 0;
DECL_INTERFACE_KNOWN (decl1) = 1;
DECL_DEFER_OUTPUT (decl1) = 1;
}
else
{
/* This is a definition, not a reference.
So clear DECL_EXTERNAL. */
DECL_EXTERNAL (decl1) = 0;
if ((DECL_DECLARED_INLINE_P (decl1)
|| DECL_TEMPLATE_INSTANTIATION (decl1))
&& ! DECL_INTERFACE_KNOWN (decl1)
/* Don't try to defer nested functions for now. */
&& ! decl_function_context (decl1))
DECL_DEFER_OUTPUT (decl1) = 1;
else
DECL_INTERFACE_KNOWN (decl1) = 1;
}
pushlevel (0);
current_binding_level->parm_flag = 1;
cplus_decl_attributes (&decl1, attrs, 0);
/* Promote the value to int before returning it. */
if (c_promoting_integer_type_p (restype))
restype = type_promotes_to (restype);
if (DECL_RESULT (decl1) == NULL_TREE)
{
DECL_RESULT (decl1)
= build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
TREE_READONLY (DECL_RESULT (decl1)) = CP_TYPE_CONST_P (restype);
TREE_THIS_VOLATILE (DECL_RESULT (decl1)) = CP_TYPE_VOLATILE_P (restype);
}
++function_depth;
if (DECL_DESTRUCTOR_P (decl1))
{
dtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
DECL_CONTEXT (dtor_label) = current_function_decl;
}
start_fname_decls ();
store_parm_decls (current_function_parms);
return 1;
}
/* Store the parameter declarations into the current function declaration.
This is called after parsing the parameter declarations, before
digesting the body of the function.
Also install to binding contour return value identifier, if any. */
static void
store_parm_decls (current_function_parms)
tree current_function_parms;
{
register tree fndecl = current_function_decl;
register tree parm;
/* This is a chain of any other decls that came in among the parm
declarations. If a parm is declared with enum {foo, bar} x;
then CONST_DECLs for foo and bar are put here. */
tree nonparms = NULL_TREE;
if (current_function_parms)
{
/* This case is when the function was defined with an ANSI prototype.
The parms already have decls, so we need not do anything here
except record them as in effect
and complain if any redundant old-style parm decls were written. */
tree specparms = current_function_parms;
tree next;
/* Must clear this because it might contain TYPE_DECLs declared
at class level. */
storedecls (NULL_TREE);
/* If we're doing semantic analysis, then we'll call pushdecl
for each of these. We must do them in reverse order so that
they end in the correct forward order. */
specparms = nreverse (specparms);
for (parm = specparms; parm; parm = next)
{
next = TREE_CHAIN (parm);
if (TREE_CODE (parm) == PARM_DECL)
{
if (DECL_NAME (parm) == NULL_TREE
|| TREE_CODE (parm) != VOID_TYPE)
pushdecl (parm);
else
error ("parameter `%D' declared void", parm);
}
else
{
/* If we find an enum constant or a type tag,
put it aside for the moment. */
TREE_CHAIN (parm) = NULL_TREE;
nonparms = chainon (nonparms, parm);
}
}
/* Get the decls in their original chain order and record in the
function. This is all and only the PARM_DECLs that were
pushed into scope by the loop above. */
DECL_ARGUMENTS (fndecl) = getdecls ();
storetags (gettags ());
}
else
DECL_ARGUMENTS (fndecl) = NULL_TREE;
/* Now store the final chain of decls for the arguments
as the decl-chain of the current lexical scope.
Put the enumerators in as well, at the front so that
DECL_ARGUMENTS is not modified. */
storedecls (chainon (nonparms, DECL_ARGUMENTS (fndecl)));
/* Do the starting of the exception specifications, if we have any. */
if (flag_exceptions && !processing_template_decl
&& flag_enforce_eh_specs
&& TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
current_eh_spec_block = begin_eh_spec_block ();
}
/* We have finished doing semantic analysis on DECL, but have not yet
generated RTL for its body. Save away our current state, so that
when we want to generate RTL later we know what to do. */
static void
save_function_data (decl)
tree decl;
{
struct cp_language_function *f;
/* Save the language-specific per-function data so that we can
get it back when we really expand this function. */
my_friendly_assert (!DECL_PENDING_INLINE_P (decl),
19990908);
/* Make a copy. */
f = ((struct cp_language_function *)
xmalloc (sizeof (struct cp_language_function)));
memcpy (f, cp_function_chain, sizeof (struct cp_language_function));
DECL_SAVED_FUNCTION_DATA (decl) = f;
/* Clear out the bits we don't need. */
f->base.x_stmt_tree.x_last_stmt = NULL_TREE;
f->base.x_stmt_tree.x_last_expr_type = NULL_TREE;
f->x_named_label_uses = NULL;
f->bindings = NULL;
f->x_local_names = NULL;
/* When we get back here again, we will be expanding. */
f->x_expanding_p = 1;
/* If we've already decided that we cannot inline this function, we
must remember that fact when we actually go to expand the
function. */
if (current_function_cannot_inline)
{
f->cannot_inline = current_function_cannot_inline;
DECL_INLINE (decl) = 0;
}
}
/* Add a note to mark the end of the main body of the constructor. This is
used to end the cleanup regions for fully-constructed bases and
members. */
static void
finish_constructor_body ()
{
/* Mark the end of the cleanups for a partially constructed object.
??? These should really be handled automatically by closing the block,
as with the destructor cleanups; the only difference is that these are
only run if an exception is thrown. */
add_stmt (build_stmt (CTOR_STMT));
}
/* At the end of every destructor we generate code to delete the object if
necessary. Do that now. */
static void
finish_destructor_body ()
{
tree exprstmt;
/* In a virtual destructor, we must call delete. */
if (DECL_VIRTUAL_P (current_function_decl))
{
tree if_stmt;
tree virtual_size = c_sizeof (current_class_type);
/* [class.dtor]
At the point of definition of a virtual destructor (including
an implicit definition), non-placement operator delete shall
be looked up in the scope of the destructor's class and if
found shall be accessible and unambiguous. */
exprstmt = build_op_delete_call
(DELETE_EXPR, current_class_ptr, virtual_size,
LOOKUP_NORMAL | LOOKUP_SPECULATIVELY, NULL_TREE);
if_stmt = begin_if_stmt ();
finish_if_stmt_cond (build (BIT_AND_EXPR, integer_type_node,
current_in_charge_parm,
integer_one_node),
if_stmt);
finish_expr_stmt (exprstmt);
finish_then_clause (if_stmt);
finish_if_stmt ();
}
}
/* Do the necessary processing for the beginning of a function body, which
in this case includes member-initializers, but not the catch clauses of
a function-try-block. Currently, this means opening a binding level
for the member-initializers (in a ctor) and member cleanups (in a dtor).
In other functions, this isn't necessary, but it doesn't hurt. */
tree
begin_function_body ()
{
tree stmt = begin_compound_stmt (0);
COMPOUND_STMT_BODY_BLOCK (stmt) = 1;
return stmt;
}
/* Do the processing for the end of a function body. Currently, this means
closing out the cleanups for fully-constructed bases and members, and in
the case of the destructor, deleting the object if desired. Again, this
is only meaningful for [cd]tors, since they are the only functions where
there is a significant distinction between the main body and any
function catch clauses. Handling, say, main() return semantics here
would be wrong, as flowing off the end of a function catch clause for
main() would also need to return 0. */
void
finish_function_body (compstmt)
tree compstmt;
{
if (processing_template_decl)
/* Do nothing now. */;
else if (DECL_DESTRUCTOR_P (current_function_decl))
/* Any return from a destructor will end up here. Put it before the
cleanups so that an explicit return doesn't duplicate them. */
add_stmt (build_stmt (LABEL_STMT, dtor_label));
/* Close the block; in a destructor, run the member cleanups. */
finish_compound_stmt (0, compstmt);
if (processing_template_decl)
/* Do nothing now. */;
else if (DECL_CONSTRUCTOR_P (current_function_decl))
finish_constructor_body ();
else if (DECL_DESTRUCTOR_P (current_function_decl))
finish_destructor_body ();
}
/* Finish up a function declaration and compile that function
all the way to assembler language output. The free the storage
for the function definition.
FLAGS is a bitwise or of the following values:
2 - INCLASS_INLINE
We just finished processing the body of an in-class inline
function definition. (This processing will have taken place
after the class definition is complete.) */
tree
finish_function (flags)
int flags;
{
register tree fndecl = current_function_decl;
tree fntype, ctype = NULL_TREE;
int inclass_inline = (flags & 2) != 0;
int nested;
/* When we get some parse errors, we can end up without a
current_function_decl, so cope. */
if (fndecl == NULL_TREE)
return error_mark_node;
nested = function_depth > 1;
fntype = TREE_TYPE (fndecl);
/* TREE_READONLY (fndecl) = 1;
This caused &foo to be of type ptr-to-const-function
which then got a warning when stored in a ptr-to-function variable. */
my_friendly_assert (building_stmt_tree (), 20000911);
finish_fname_decls ();
/* For a cloned function, we've already got all the code we need;
there's no need to add any extra bits. */
if (!DECL_CLONED_FUNCTION_P (fndecl))
{
if (DECL_MAIN_P (current_function_decl))
{
/* Make it so that `main' always returns 0 by default. */
#ifdef VMS_TARGET
finish_return_stmt (integer_one_node);
#else
finish_return_stmt (integer_zero_node);
#endif
}
/* Finish dealing with exception specifiers. */
if (flag_exceptions && !processing_template_decl
&& flag_enforce_eh_specs
&& TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
(TREE_TYPE (current_function_decl)),
current_eh_spec_block);
}
/* If we're saving up tree structure, tie off the function now. */
finish_stmt_tree (&DECL_SAVED_TREE (fndecl));
/* This must come after expand_function_end because cleanups might
have declarations (from inline functions) that need to go into
this function's blocks. */
if (current_binding_level->parm_flag != 1)
my_friendly_abort (122);
poplevel (1, 0, 1);
/* Set up the named return value optimization, if we can. Here, we
eliminate the copy from the nrv into the RESULT_DECL and any cleanup
for the nrv. genrtl_start_function and declare_return_variable
handle making the nrv and RESULT_DECL share space. */
if (current_function_return_value)
{
tree r = current_function_return_value;
/* This is only worth doing for fns that return in memory--and
simpler, since we don't have to worry about promoted modes. */
if (r != error_mark_node
&& aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl))))
{
DECL_ALIGN (r) = DECL_ALIGN (DECL_RESULT (fndecl));
walk_tree_without_duplicates (&DECL_SAVED_TREE (fndecl),
nullify_returns_r, r);
}
else
/* Clear it so genrtl_start_function and declare_return_variable
know we're not optimizing. */
current_function_return_value = NULL_TREE;
}
/* Remember that we were in class scope. */
if (current_class_name)
ctype = current_class_type;
/* Must mark the RESULT_DECL as being in this function. */
DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
/* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
to the FUNCTION_DECL node itself. */
BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
/* Save away current state, if appropriate. */
if (!processing_template_decl)
save_function_data (fndecl);
/* If this function calls `setjmp' it cannot be inlined. When
`longjmp' is called it is not guaranteed to restore the value of
local variables that have been modified since the call to
`setjmp'. So, if were to inline this function into some caller
`c', then when we `longjmp', we might not restore all variables
in `c'. (It might seem, at first blush, that there's no way for
this function to modify local variables in `c', but their
addresses may have been stored somewhere accessible to this
function.) */
if (!processing_template_decl && calls_setjmp_p (fndecl))
DECL_UNINLINABLE (fndecl) = 1;
/* Clear out memory we no longer need. */
free_after_parsing (cfun);
/* Since we never call rest_of_compilation, we never clear
CFUN. Do so explicitly. */
free_after_compilation (cfun);
cfun = NULL;
/* If this is a in-class inline definition, we may have to pop the
bindings for the template parameters that we added in
maybe_begin_member_template_processing when start_function was
called. */
if (inclass_inline)
maybe_end_member_template_processing ();
/* Leave the scope of the class. */
if (ctype)
pop_nested_class ();
--function_depth;
/* Clean up. */
if (! nested)
/* Let the error reporting routines know that we're outside a
function. For a nested function, this value is used in
pop_cp_function_context and then reset via pop_function_context. */
current_function_decl = NULL_TREE;
return fndecl;
}
/* Create the FUNCTION_DECL for a function definition.
DECLSPECS and DECLARATOR are the parts of the declaration;
they describe the return type and the name of the function,
but twisted together in a fashion that parallels the syntax of C.
This function creates a binding context for the function body
as well as setting up the FUNCTION_DECL in current_function_decl.
Returns a FUNCTION_DECL on success.
If the DECLARATOR is not suitable for a function (it defines a datum
instead), we return 0, which tells yyparse to report a parse error.
May return void_type_node indicating that this method is actually
a friend. See grokfield for more details.
Came here with a `.pushlevel' .
DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
CHANGES TO CODE IN `grokfield'. */
tree
start_method (declspecs, declarator, attrlist)
tree declarator, declspecs, attrlist;
{
tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
&attrlist);
/* Something too ugly to handle. */
if (fndecl == NULL_TREE)
return NULL_TREE;
/* Pass friends other than inline friend functions back. */
if (fndecl == void_type_node)
return fndecl;
if (TREE_CODE (fndecl) != FUNCTION_DECL)
/* Not a function, tell parser to report parse error. */
return NULL_TREE;
if (DECL_IN_AGGR_P (fndecl))
{
if (IDENTIFIER_ERROR_LOCUS (DECL_ASSEMBLER_NAME (fndecl)) != current_class_type)
{
if (DECL_CONTEXT (fndecl)
&& TREE_CODE( DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
error ("`%D' is already defined in class `%T'", fndecl,
DECL_CONTEXT (fndecl));
}
return void_type_node;
}
check_template_shadow (fndecl);
DECL_DECLARED_INLINE_P (fndecl) = 1;
if (flag_default_inline)
DECL_INLINE (fndecl) = 1;
/* We process method specializations in finish_struct_1. */
if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
fndecl = push_template_decl (fndecl);
if (! DECL_FRIEND_P (fndecl))
{
if (TREE_CHAIN (fndecl))
{
fndecl = copy_node (fndecl);
TREE_CHAIN (fndecl) = NULL_TREE;
}
grok_special_member_properties (fndecl);
}
cp_finish_decl (fndecl, NULL_TREE, NULL_TREE, 0);
/* Make a place for the parms */
pushlevel (0);
current_binding_level->parm_flag = 1;
DECL_IN_AGGR_P (fndecl) = 1;
return fndecl;
}
/* Go through the motions of finishing a function definition.
We don't compile this method until after the whole class has
been processed.
FINISH_METHOD must return something that looks as though it
came from GROKFIELD (since we are defining a method, after all).
This is called after parsing the body of the function definition.
STMTS is the chain of statements that makes up the function body.
DECL is the ..._DECL that `start_method' provided. */
tree
finish_method (decl)
tree decl;
{
register tree fndecl = decl;
tree old_initial;
register tree link;
if (decl == void_type_node)
return decl;
old_initial = DECL_INITIAL (fndecl);
/* Undo the level for the parms (from start_method).
This is like poplevel, but it causes nothing to be
saved. Saving information here confuses symbol-table
output routines. Besides, this information will
be correctly output when this method is actually
compiled. */
/* Clear out the meanings of the local variables of this level;
also record in each decl which block it belongs to. */
for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
{
if (DECL_NAME (link) != NULL_TREE)
pop_binding (DECL_NAME (link), link);
my_friendly_assert (TREE_CODE (link) != FUNCTION_DECL, 163);
DECL_CONTEXT (link) = NULL_TREE;
}
GNU_xref_end_scope ((size_t) current_binding_level,
(size_t) current_binding_level->level_chain,
current_binding_level->parm_flag,
current_binding_level->keep);
poplevel (0, 0, 0);
DECL_INITIAL (fndecl) = old_initial;
/* We used to check if the context of FNDECL was different from
current_class_type as another way to get inside here. This didn't work
for String.cc in libg++. */
if (DECL_FRIEND_P (fndecl))
{
CLASSTYPE_INLINE_FRIENDS (current_class_type)
= tree_cons (NULL_TREE, fndecl, CLASSTYPE_INLINE_FRIENDS (current_class_type));
decl = void_type_node;
}
return decl;
}
/* Called when a new struct TYPE is defined.
If this structure or union completes the type of any previous
variable declaration, lay it out and output its rtl. */
void
hack_incomplete_structures (type)
tree type;
{
tree *list;
struct binding_level *level;
if (!type) /* Don't do this for class templates. */
return;
if (namespace_bindings_p ())
{
level = 0;
list = &namespace_scope_incomplete;
}
else
{
level = innermost_nonclass_level ();
list = &level->incomplete;
}
while (1)
{
while (*list)
{
tree decl = TREE_VALUE (*list);
if ((decl && TREE_TYPE (decl) == type)
|| (TREE_TYPE (decl)
&& TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE
&& TREE_TYPE (TREE_TYPE (decl)) == type))
{
int toplevel = toplevel_bindings_p ();
if (TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE
&& TREE_TYPE (TREE_TYPE (decl)) == type)
layout_type (TREE_TYPE (decl));
layout_decl (decl, 0);
rest_of_decl_compilation (decl, NULL, toplevel, 0);
if (! toplevel)
{
tree cleanup;
expand_decl (decl);
cleanup = maybe_build_cleanup (decl);
expand_decl_init (decl);
if (! expand_decl_cleanup (decl, cleanup))
error ("parser lost in parsing declaration of `%D'",
decl);
}
*list = TREE_CHAIN (*list);
}
else
list = &TREE_CHAIN (*list);
}
/* Keep looking through artificial binding levels generated
for local variables. */
if (level && level->keep == 2)
{
level = level->level_chain;
list = &level->incomplete;
}
else
break;
}
}
/* If DECL is of a type which needs a cleanup, build that cleanup
here. */
tree
maybe_build_cleanup (decl)
tree decl;
{
tree type = TREE_TYPE (decl);
if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
{
int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
tree rval;
if (TREE_CODE (type) == ARRAY_TYPE)
rval = decl;
else
{
mark_addressable (decl);
rval = build_unary_op (ADDR_EXPR, decl, 0);
}
/* Optimize for space over speed here. */
if (! TYPE_USES_VIRTUAL_BASECLASSES (type)
|| flag_expensive_optimizations)
flags |= LOOKUP_NONVIRTUAL;
rval = build_delete (TREE_TYPE (rval), rval,
sfk_complete_destructor, flags, 0);
if (TYPE_USES_VIRTUAL_BASECLASSES (type)
&& ! TYPE_HAS_DESTRUCTOR (type))
rval = build_compound_expr (tree_cons (NULL_TREE, rval,
build_tree_list (NULL_TREE, build_vbase_delete (type, decl))));
return rval;
}
return 0;
}
/* When a stmt has been parsed, this function is called. */
void
finish_stmt ()
{
/* Always assume this statement was not an expression statement. If
it actually was an expression statement, its our callers
responsibility to fix this up. */
last_expr_type = NULL_TREE;
}
/* DECL was originally constructed as a non-static member function,
but turned out to be static. Update it accordingly. */
void
revert_static_member_fn (decl)
tree decl;
{
tree tmp;
tree function = TREE_TYPE (decl);
tree args = TYPE_ARG_TYPES (function);
if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
!= TYPE_UNQUALIFIED)
error ("static member function `%#D' declared with type qualifiers",
decl);
args = TREE_CHAIN (args);
tmp = build_function_type (TREE_TYPE (function), args);
tmp = build_qualified_type (tmp, cp_type_quals (function));
tmp = build_exception_variant (tmp,
TYPE_RAISES_EXCEPTIONS (function));
TREE_TYPE (decl) = tmp;
if (DECL_ARGUMENTS (decl))
DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
DECL_STATIC_FUNCTION_P (decl) = 1;
}
/* Initialize the variables used during compilation of a C++
function. */
static void
push_cp_function_context (f)
struct function *f;
{
struct cp_language_function *p
= ((struct cp_language_function *)
xcalloc (1, sizeof (struct cp_language_function)));
f->language = (struct language_function *) p;
/* It takes an explicit call to expand_body to generate RTL for a
function. */
expanding_p = 0;
/* Whenever we start a new function, we destroy temporaries in the
usual way. */
current_stmt_tree ()->stmts_are_full_exprs_p = 1;
}
/* Free the language-specific parts of F, now that we've finished
compiling the function. */
static void
pop_cp_function_context (f)
struct function *f;
{
if (f->language)
{
struct cp_language_function *cp =
(struct cp_language_function *) f->language;
if (cp->x_local_names)
VARRAY_FREE (cp->x_local_names);
free (f->language);
}
f->language = 0;
}
/* Mark P for GC. */
static void
mark_lang_function (p)
struct cp_language_function *p;
{
if (!p)
return;
mark_c_language_function (&p->base);
ggc_mark_tree (p->x_dtor_label);
ggc_mark_tree (p->x_current_class_ptr);
ggc_mark_tree (p->x_current_class_ref);
ggc_mark_tree (p->x_eh_spec_block);
ggc_mark_tree_varray (p->x_local_names);
mark_named_label_lists (&p->x_named_labels, &p->x_named_label_uses);
mark_binding_level (&p->bindings);
}
/* Mark the language-specific data in F for GC. */
static void
mark_cp_function_context (f)
struct function *f;
{
mark_lang_function ((struct cp_language_function *) f->language);
}
void
lang_mark_tree (t)
tree t;
{
enum tree_code code = TREE_CODE (t);
if (code == IDENTIFIER_NODE)
{
struct lang_identifier *li = (struct lang_identifier *) t;
struct lang_id2 *li2 = li->x;
ggc_mark_tree (li->namespace_bindings);
ggc_mark_tree (li->bindings);
ggc_mark_tree (li->class_value);
ggc_mark_tree (li->class_template_info);
if (li2)
{
ggc_mark_tree (li2->label_value);
ggc_mark_tree (li2->implicit_decl);
ggc_mark_tree (li2->error_locus);
}
}
else if (code == CPLUS_BINDING)
{
if (BINDING_HAS_LEVEL_P (t))
mark_binding_level (&BINDING_LEVEL (t));
else
ggc_mark_tree (BINDING_SCOPE (t));
ggc_mark_tree (BINDING_VALUE (t));
}
else if (code == OVERLOAD)
ggc_mark_tree (OVL_FUNCTION (t));
else if (code == TEMPLATE_PARM_INDEX)
ggc_mark_tree (TEMPLATE_PARM_DECL (t));
else if (TREE_CODE_CLASS (code) == 'd')
{
struct lang_decl *ld = DECL_LANG_SPECIFIC (t);
if (ld)
{
ggc_mark (ld);
c_mark_lang_decl (&ld->decl_flags.base);
if (!DECL_GLOBAL_CTOR_P (t)
&& !DECL_GLOBAL_DTOR_P (t)
&& !DECL_THUNK_P (t)
&& !DECL_DISCRIMINATOR_P (t))
ggc_mark_tree (ld->decl_flags.u2.access);
else if (DECL_THUNK_P (t))
ggc_mark_tree (ld->decl_flags.u2.vcall_offset);
if (TREE_CODE (t) != NAMESPACE_DECL)
ggc_mark_tree (ld->decl_flags.u.template_info);
else
mark_binding_level (&NAMESPACE_LEVEL (t));
if (CAN_HAVE_FULL_LANG_DECL_P (t))
{
ggc_mark_tree (ld->befriending_classes);
ggc_mark_tree (ld->context);
ggc_mark_tree (ld->cloned_function);
if (TREE_CODE (t) == TYPE_DECL)
ggc_mark_tree (ld->u.sorted_fields);
else if (TREE_CODE (t) == FUNCTION_DECL
&& !DECL_PENDING_INLINE_P (t))
mark_lang_function (DECL_SAVED_FUNCTION_DATA (t));
}
}
}
else if (TREE_CODE_CLASS (code) == 't')
{
struct lang_type *lt = TYPE_LANG_SPECIFIC (t);
if (lt && !(TREE_CODE (t) == POINTER_TYPE
&& TREE_CODE (TREE_TYPE (t)) == METHOD_TYPE))
{
ggc_mark (lt);
ggc_mark_tree (lt->primary_base);
ggc_mark_tree (lt->vfields);
ggc_mark_tree (lt->vbases);
ggc_mark_tree (lt->tags);
ggc_mark_tree (lt->size);
ggc_mark_tree (lt->pure_virtuals);
ggc_mark_tree (lt->friend_classes);
ggc_mark_tree (lt->rtti);
ggc_mark_tree (lt->methods);
ggc_mark_tree (lt->template_info);
ggc_mark_tree (lt->befriending_classes);
}
else if (lt)
/* In the case of pointer-to-member function types, the
TYPE_LANG_SPECIFIC is really just a tree. */
ggc_mark_tree ((tree) lt);
}
}
/* Return the IDENTIFIER_GLOBAL_VALUE of T, for use in common code, since
the definition of IDENTIFIER_GLOBAL_VALUE is different for C and C++. */
tree
identifier_global_value (t)
tree t;
{
return IDENTIFIER_GLOBAL_VALUE (t);
}
/* Build the void_list_node (void_type_node having been created). */
tree
build_void_list_node ()
{
tree t = build_tree_list (NULL_TREE, void_type_node);
TREE_PARMLIST (t) = 1;
return t;
}
static int
cp_missing_noreturn_ok_p (decl)
tree decl;
{
/* A missing noreturn is ok for the `main' function. */
return DECL_MAIN_P (decl);
}