blob: 59e399bc3b406a27dbac50398ab27c99dc8c468b [file] [log] [blame]
/* YACC parser for C syntax and for Objective C. -*-c-*-
Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996,
1997, 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
This file is part of GCC.
GCC 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.
GCC 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 GCC; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
/* This file defines the grammar of C and that of Objective C.
ifobjc ... end ifobjc conditionals contain code for Objective C only.
ifc ... end ifc conditionals contain code for C only.
Sed commands in Makefile.in are used to convert this file into
c-parse.y and into objc-parse.y. */
/* To whomever it may concern: I have heard that such a thing was once
written by AT&T, but I have never seen it. */
ifc
%expect 10 /* shift/reduce conflicts, and no reduce/reduce conflicts. */
end ifc
%{
#include "config.h"
#include "system.h"
#include "tree.h"
#include "input.h"
#include "cpplib.h"
#include "intl.h"
#include "timevar.h"
#include "c-pragma.h" /* For YYDEBUG definition, and parse_in. */
#include "c-tree.h"
#include "flags.h"
#include "output.h"
#include "toplev.h"
#include "ggc.h"
#ifdef MULTIBYTE_CHARS
#include <locale.h>
#endif
ifobjc
#include "objc-act.h"
end ifobjc
/* Like YYERROR but do call yyerror. */
#define YYERROR1 { yyerror ("syntax error"); YYERROR; }
/* Like the default stack expander, except (1) use realloc when possible,
(2) impose no hard maxiumum on stack size, (3) REALLY do not use alloca.
Irritatingly, YYSTYPE is defined after this %{ %} block, so we cannot
give malloced_yyvs its proper type. This is ok since all we need from
it is to be able to free it. */
static short *malloced_yyss;
static void *malloced_yyvs;
#define yyoverflow(MSG, SS, SSSIZE, VS, VSSIZE, YYSSZ) \
do { \
size_t newsize; \
short *newss; \
YYSTYPE *newvs; \
newsize = *(YYSSZ) *= 2; \
if (malloced_yyss) \
{ \
newss = (short *) \
really_call_realloc (*(SS), newsize * sizeof (short)); \
newvs = (YYSTYPE *) \
really_call_realloc (*(VS), newsize * sizeof (YYSTYPE)); \
} \
else \
{ \
newss = (short *) really_call_malloc (newsize * sizeof (short)); \
newvs = (YYSTYPE *) really_call_malloc (newsize * sizeof (YYSTYPE)); \
if (newss) \
memcpy (newss, *(SS), (SSSIZE)); \
if (newvs) \
memcpy (newvs, *(VS), (VSSIZE)); \
} \
if (!newss || !newvs) \
{ \
yyerror (MSG); \
return 2; \
} \
*(SS) = newss; \
*(VS) = newvs; \
malloced_yyss = newss; \
malloced_yyvs = (void *) newvs; \
} while (0)
%}
%start program
%union {long itype; tree ttype; enum tree_code code;
const char *filename; int lineno; }
/* All identifiers that are not reserved words
and are not declared typedefs in the current block */
%token IDENTIFIER
/* All identifiers that are declared typedefs in the current block.
In some contexts, they are treated just like IDENTIFIER,
but they can also serve as typespecs in declarations. */
%token TYPENAME
/* Reserved words that specify storage class.
yylval contains an IDENTIFIER_NODE which indicates which one. */
%token SCSPEC /* Storage class other than static. */
%token STATIC /* Static storage class. */
/* Reserved words that specify type.
yylval contains an IDENTIFIER_NODE which indicates which one. */
%token TYPESPEC
/* Reserved words that qualify type: "const", "volatile", or "restrict".
yylval contains an IDENTIFIER_NODE which indicates which one. */
%token TYPE_QUAL
/* Character or numeric constants.
yylval is the node for the constant. */
%token CONSTANT
/* String constants in raw form.
yylval is a STRING_CST node. */
%token STRING
/* "...", used for functions with variable arglists. */
%token ELLIPSIS
/* the reserved words */
/* SCO include files test "ASM", so use something else. */
%token SIZEOF ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
%token BREAK CONTINUE RETURN GOTO ASM_KEYWORD TYPEOF ALIGNOF
%token ATTRIBUTE EXTENSION LABEL
%token REALPART IMAGPART VA_ARG CHOOSE_EXPR TYPES_COMPATIBLE_P
%token PTR_VALUE PTR_BASE PTR_EXTENT
/* function name can be a string const or a var decl. */
%token STRING_FUNC_NAME VAR_FUNC_NAME
/* Add precedence rules to solve dangling else s/r conflict */
%nonassoc IF
%nonassoc ELSE
/* Define the operator tokens and their precedences.
The value is an integer because, if used, it is the tree code
to use in the expression made from the operator. */
%right <code> ASSIGN '='
%right <code> '?' ':'
%left <code> OROR
%left <code> ANDAND
%left <code> '|'
%left <code> '^'
%left <code> '&'
%left <code> EQCOMPARE
%left <code> ARITHCOMPARE
%left <code> LSHIFT RSHIFT
%left <code> '+' '-'
%left <code> '*' '/' '%'
%right <code> UNARY PLUSPLUS MINUSMINUS
%left HYPERUNARY
%left <code> POINTSAT '.' '(' '['
/* The Objective-C keywords. These are included in C and in
Objective C, so that the token codes are the same in both. */
%token INTERFACE IMPLEMENTATION END SELECTOR DEFS ENCODE
%token CLASSNAME PUBLIC PRIVATE PROTECTED PROTOCOL OBJECTNAME CLASS ALIAS
%type <code> unop
%type <ttype> ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
%type <ttype> BREAK CONTINUE RETURN GOTO ASM_KEYWORD SIZEOF TYPEOF ALIGNOF
%type <ttype> identifier IDENTIFIER TYPENAME CONSTANT expr nonnull_exprlist exprlist
%type <ttype> expr_no_commas cast_expr unary_expr primary STRING
%type <ttype> declspecs_nosc_nots_nosa_noea declspecs_nosc_nots_nosa_ea
%type <ttype> declspecs_nosc_nots_sa_noea declspecs_nosc_nots_sa_ea
%type <ttype> declspecs_nosc_ts_nosa_noea declspecs_nosc_ts_nosa_ea
%type <ttype> declspecs_nosc_ts_sa_noea declspecs_nosc_ts_sa_ea
%type <ttype> declspecs_sc_nots_nosa_noea declspecs_sc_nots_nosa_ea
%type <ttype> declspecs_sc_nots_sa_noea declspecs_sc_nots_sa_ea
%type <ttype> declspecs_sc_ts_nosa_noea declspecs_sc_ts_nosa_ea
%type <ttype> declspecs_sc_ts_sa_noea declspecs_sc_ts_sa_ea
%type <ttype> declspecs_ts declspecs_nots
%type <ttype> declspecs_ts_nosa declspecs_nots_nosa
%type <ttype> declspecs_nosc_ts declspecs_nosc_nots declspecs_nosc declspecs
%type <ttype> maybe_type_quals_attrs typespec_nonattr typespec_attr
%type <ttype> typespec_reserved_nonattr typespec_reserved_attr
%type <ttype> typespec_nonreserved_nonattr
%type <ttype> scspec SCSPEC STATIC TYPESPEC TYPE_QUAL maybe_type_qual
%type <ttype> initdecls notype_initdecls initdcl notype_initdcl
%type <ttype> init maybeasm
%type <ttype> asm_operands nonnull_asm_operands asm_operand asm_clobbers
%type <ttype> maybe_attribute attributes attribute attribute_list attrib
%type <ttype> any_word extension
%type <ttype> compstmt compstmt_start compstmt_nostart compstmt_primary_start
%type <ttype> do_stmt_start poplevel stmt label
%type <ttype> c99_block_start c99_block_end
%type <ttype> declarator
%type <ttype> notype_declarator after_type_declarator
%type <ttype> parm_declarator
%type <ttype> parm_declarator_starttypename parm_declarator_nostarttypename
%type <ttype> array_declarator
%type <ttype> structsp_attr structsp_nonattr
%type <ttype> component_decl_list component_decl_list2
%type <ttype> component_decl components components_notype component_declarator
%type <ttype> component_notype_declarator
%type <ttype> enumlist enumerator
%type <ttype> struct_head union_head enum_head
%type <ttype> typename absdcl absdcl1 absdcl1_ea absdcl1_noea
%type <ttype> direct_absdcl1 absdcl_maybe_attribute
%type <ttype> xexpr parms parm firstparm identifiers
%type <ttype> parmlist parmlist_1 parmlist_2
%type <ttype> parmlist_or_identifiers parmlist_or_identifiers_1
%type <ttype> identifiers_or_typenames
%type <itype> setspecs setspecs_fp
%type <filename> save_filename
%type <lineno> save_lineno
ifobjc
/* the Objective-C nonterminals */
%type <ttype> ivar_decl_list ivar_decls ivar_decl ivars ivar_declarator
%type <ttype> methoddecl unaryselector keywordselector selector
%type <ttype> keyworddecl receiver objcmessageexpr messageargs
%type <ttype> keywordexpr keywordarglist keywordarg
%type <ttype> myparms myparm optparmlist reservedwords objcselectorexpr
%type <ttype> selectorarg keywordnamelist keywordname objcencodeexpr
%type <ttype> objc_string non_empty_protocolrefs protocolrefs identifier_list objcprotocolexpr
%type <ttype> CLASSNAME OBJECTNAME
end ifobjc
%{
/* Number of statements (loosely speaking) and compound statements
seen so far. */
static int stmt_count;
static int compstmt_count;
/* Input file and line number of the end of the body of last simple_if;
used by the stmt-rule immediately after simple_if returns. */
static const char *if_stmt_file;
static int if_stmt_line;
/* List of types and structure classes of the current declaration. */
static GTY(()) tree current_declspecs;
static GTY(()) tree prefix_attributes;
/* List of all the attributes applying to the identifier currently being
declared; includes prefix_attributes and possibly some more attributes
just after a comma. */
static GTY(()) tree all_prefix_attributes;
/* Stack of saved values of current_declspecs, prefix_attributes and
all_prefix_attributes. */
static GTY(()) tree declspec_stack;
/* PUSH_DECLSPEC_STACK is called from setspecs; POP_DECLSPEC_STACK
should be called from the productions making use of setspecs. */
#define PUSH_DECLSPEC_STACK \
do { \
declspec_stack = tree_cons (build_tree_list (prefix_attributes, \
all_prefix_attributes), \
current_declspecs, \
declspec_stack); \
} while (0)
#define POP_DECLSPEC_STACK \
do { \
current_declspecs = TREE_VALUE (declspec_stack); \
prefix_attributes = TREE_PURPOSE (TREE_PURPOSE (declspec_stack)); \
all_prefix_attributes = TREE_VALUE (TREE_PURPOSE (declspec_stack)); \
declspec_stack = TREE_CHAIN (declspec_stack); \
} while (0)
/* For __extension__, save/restore the warning flags which are
controlled by __extension__. */
#define SAVE_EXT_FLAGS() \
size_int (pedantic \
| (warn_pointer_arith << 1) \
| (warn_traditional << 2) \
| (flag_iso << 3))
#define RESTORE_EXT_FLAGS(tval) \
do { \
int val = tree_low_cst (tval, 0); \
pedantic = val & 1; \
warn_pointer_arith = (val >> 1) & 1; \
warn_traditional = (val >> 2) & 1; \
flag_iso = (val >> 3) & 1; \
} while (0)
ifobjc
/* Objective-C specific parser/lexer information */
static enum tree_code objc_inherit_code;
static int objc_pq_context = 0, objc_public_flag = 0;
/* The following flag is needed to contextualize ObjC lexical analysis.
In some cases (e.g., 'int NSObject;'), it is undesirable to bind
an identifier to an ObjC class, even if a class with that name
exists. */
static int objc_need_raw_identifier;
#define OBJC_NEED_RAW_IDENTIFIER(VAL) objc_need_raw_identifier = VAL
end ifobjc
ifc
#define OBJC_NEED_RAW_IDENTIFIER(VAL) /* nothing */
end ifc
static bool parsing_iso_function_signature;
/* Tell yyparse how to print a token's value, if yydebug is set. */
#define YYPRINT(FILE,YYCHAR,YYLVAL) yyprint(FILE,YYCHAR,YYLVAL)
static void yyprint PARAMS ((FILE *, int, YYSTYPE));
static void yyerror PARAMS ((const char *));
static int yylexname PARAMS ((void));
static int yylexstring PARAMS ((void));
static inline int _yylex PARAMS ((void));
static int yylex PARAMS ((void));
static void init_reswords PARAMS ((void));
/* Initialisation routine for this file. */
void
c_parse_init ()
{
init_reswords ();
}
%}
%%
program: /* empty */
{ if (pedantic)
pedwarn ("ISO C forbids an empty source file");
finish_file ();
}
| extdefs
{
/* In case there were missing closebraces,
get us back to the global binding level. */
while (! global_bindings_p ())
poplevel (0, 0, 0);
/* __FUNCTION__ is defined at file scope (""). This
call may not be necessary as my tests indicate it
still works without it. */
finish_fname_decls ();
finish_file ();
}
;
/* the reason for the strange actions in this rule
is so that notype_initdecls when reached via datadef
can find a valid list of type and sc specs in $0. */
extdefs:
{$<ttype>$ = NULL_TREE; } extdef
| extdefs {$<ttype>$ = NULL_TREE; ggc_collect(); } extdef
;
extdef:
extdef_1
{ parsing_iso_function_signature = false; } /* Reset after any external definition. */
;
extdef_1:
fndef
| datadef
ifobjc
| objcdef
end ifobjc
| ASM_KEYWORD '(' expr ')' ';'
{ STRIP_NOPS ($3);
if ((TREE_CODE ($3) == ADDR_EXPR
&& TREE_CODE (TREE_OPERAND ($3, 0)) == STRING_CST)
|| TREE_CODE ($3) == STRING_CST)
assemble_asm ($3);
else
error ("argument of `asm' is not a constant string"); }
| extension extdef
{ RESTORE_EXT_FLAGS ($1); }
;
datadef:
setspecs notype_initdecls ';'
{ if (pedantic)
error ("ISO C forbids data definition with no type or storage class");
else
warning ("data definition has no type or storage class");
POP_DECLSPEC_STACK; }
| declspecs_nots setspecs notype_initdecls ';'
{ POP_DECLSPEC_STACK; }
| declspecs_ts setspecs initdecls ';'
{ POP_DECLSPEC_STACK; }
| declspecs ';'
{ shadow_tag ($1); }
| error ';'
| error '}'
| ';'
{ if (pedantic)
pedwarn ("ISO C does not allow extra `;' outside of a function"); }
;
fndef:
declspecs_ts setspecs declarator
{ if (! start_function (current_declspecs, $3,
all_prefix_attributes))
YYERROR1;
}
old_style_parm_decls
{ store_parm_decls (); }
save_filename save_lineno compstmt_or_error
{ DECL_SOURCE_FILE (current_function_decl) = $7;
DECL_SOURCE_LINE (current_function_decl) = $8;
finish_function (0, 1);
POP_DECLSPEC_STACK; }
| declspecs_ts setspecs declarator error
{ POP_DECLSPEC_STACK; }
| declspecs_nots setspecs notype_declarator
{ if (! start_function (current_declspecs, $3,
all_prefix_attributes))
YYERROR1;
}
old_style_parm_decls
{ store_parm_decls (); }
save_filename save_lineno compstmt_or_error
{ DECL_SOURCE_FILE (current_function_decl) = $7;
DECL_SOURCE_LINE (current_function_decl) = $8;
finish_function (0, 1);
POP_DECLSPEC_STACK; }
| declspecs_nots setspecs notype_declarator error
{ POP_DECLSPEC_STACK; }
| setspecs notype_declarator
{ if (! start_function (NULL_TREE, $2,
all_prefix_attributes))
YYERROR1;
}
old_style_parm_decls
{ store_parm_decls (); }
save_filename save_lineno compstmt_or_error
{ DECL_SOURCE_FILE (current_function_decl) = $6;
DECL_SOURCE_LINE (current_function_decl) = $7;
finish_function (0, 1);
POP_DECLSPEC_STACK; }
| setspecs notype_declarator error
{ POP_DECLSPEC_STACK; }
;
identifier:
IDENTIFIER
| TYPENAME
ifobjc
| OBJECTNAME
| CLASSNAME
end ifobjc
;
unop: '&'
{ $$ = ADDR_EXPR; }
| '-'
{ $$ = NEGATE_EXPR; }
| '+'
{ $$ = CONVERT_EXPR;
ifc
if (warn_traditional && !in_system_header)
warning ("traditional C rejects the unary plus operator");
end ifc
}
| PLUSPLUS
{ $$ = PREINCREMENT_EXPR; }
| MINUSMINUS
{ $$ = PREDECREMENT_EXPR; }
| '~'
{ $$ = BIT_NOT_EXPR; }
| '!'
{ $$ = TRUTH_NOT_EXPR; }
;
expr: nonnull_exprlist
{ $$ = build_compound_expr ($1); }
;
exprlist:
/* empty */
{ $$ = NULL_TREE; }
| nonnull_exprlist
;
nonnull_exprlist:
expr_no_commas
{ $$ = build_tree_list (NULL_TREE, $1); }
| nonnull_exprlist ',' expr_no_commas
{ chainon ($1, build_tree_list (NULL_TREE, $3)); }
;
unary_expr:
primary
| '*' cast_expr %prec UNARY
{ $$ = build_indirect_ref ($2, "unary *"); }
/* __extension__ turns off -pedantic for following primary. */
| extension cast_expr %prec UNARY
{ $$ = $2;
RESTORE_EXT_FLAGS ($1); }
| unop cast_expr %prec UNARY
{ $$ = build_unary_op ($1, $2, 0);
overflow_warning ($$); }
/* Refer to the address of a label as a pointer. */
| ANDAND identifier
{ $$ = finish_label_address_expr ($2); }
| sizeof unary_expr %prec UNARY
{ skip_evaluation--;
if (TREE_CODE ($2) == COMPONENT_REF
&& DECL_C_BIT_FIELD (TREE_OPERAND ($2, 1)))
error ("`sizeof' applied to a bit-field");
$$ = c_sizeof (TREE_TYPE ($2)); }
| sizeof '(' typename ')' %prec HYPERUNARY
{ skip_evaluation--;
$$ = c_sizeof (groktypename ($3)); }
| alignof unary_expr %prec UNARY
{ skip_evaluation--;
$$ = c_alignof_expr ($2); }
| alignof '(' typename ')' %prec HYPERUNARY
{ skip_evaluation--;
$$ = c_alignof (groktypename ($3)); }
| REALPART cast_expr %prec UNARY
{ $$ = build_unary_op (REALPART_EXPR, $2, 0); }
| IMAGPART cast_expr %prec UNARY
{ $$ = build_unary_op (IMAGPART_EXPR, $2, 0); }
;
sizeof:
SIZEOF { skip_evaluation++; }
;
alignof:
ALIGNOF { skip_evaluation++; }
;
typeof:
TYPEOF { skip_evaluation++; }
;
cast_expr:
unary_expr
| '(' typename ')' cast_expr %prec UNARY
{ $$ = c_cast_expr ($2, $4); }
;
expr_no_commas:
cast_expr
| expr_no_commas '+' expr_no_commas
{ $$ = parser_build_binary_op ($2, $1, $3); }
| expr_no_commas '-' expr_no_commas
{ $$ = parser_build_binary_op ($2, $1, $3); }
| expr_no_commas '*' expr_no_commas
{ $$ = parser_build_binary_op ($2, $1, $3); }
| expr_no_commas '/' expr_no_commas
{ $$ = parser_build_binary_op ($2, $1, $3); }
| expr_no_commas '%' expr_no_commas
{ $$ = parser_build_binary_op ($2, $1, $3); }
| expr_no_commas LSHIFT expr_no_commas
{ $$ = parser_build_binary_op ($2, $1, $3); }
| expr_no_commas RSHIFT expr_no_commas
{ $$ = parser_build_binary_op ($2, $1, $3); }
| expr_no_commas ARITHCOMPARE expr_no_commas
{ $$ = parser_build_binary_op ($2, $1, $3); }
| expr_no_commas EQCOMPARE expr_no_commas
{ $$ = parser_build_binary_op ($2, $1, $3); }
| expr_no_commas '&' expr_no_commas
{ $$ = parser_build_binary_op ($2, $1, $3); }
| expr_no_commas '|' expr_no_commas
{ $$ = parser_build_binary_op ($2, $1, $3); }
| expr_no_commas '^' expr_no_commas
{ $$ = parser_build_binary_op ($2, $1, $3); }
| expr_no_commas ANDAND
{ $1 = c_common_truthvalue_conversion
(default_conversion ($1));
skip_evaluation += $1 == boolean_false_node; }
expr_no_commas
{ skip_evaluation -= $1 == boolean_false_node;
$$ = parser_build_binary_op (TRUTH_ANDIF_EXPR, $1, $4); }
| expr_no_commas OROR
{ $1 = c_common_truthvalue_conversion
(default_conversion ($1));
skip_evaluation += $1 == boolean_true_node; }
expr_no_commas
{ skip_evaluation -= $1 == boolean_true_node;
$$ = parser_build_binary_op (TRUTH_ORIF_EXPR, $1, $4); }
| expr_no_commas '?'
{ $1 = c_common_truthvalue_conversion
(default_conversion ($1));
skip_evaluation += $1 == boolean_false_node; }
expr ':'
{ skip_evaluation += (($1 == boolean_true_node)
- ($1 == boolean_false_node)); }
expr_no_commas
{ skip_evaluation -= $1 == boolean_true_node;
$$ = build_conditional_expr ($1, $4, $7); }
| expr_no_commas '?'
{ if (pedantic)
pedwarn ("ISO C forbids omitting the middle term of a ?: expression");
/* Make sure first operand is calculated only once. */
$<ttype>2 = save_expr ($1);
$1 = c_common_truthvalue_conversion
(default_conversion ($<ttype>2));
skip_evaluation += $1 == boolean_true_node; }
':' expr_no_commas
{ skip_evaluation -= $1 == boolean_true_node;
$$ = build_conditional_expr ($1, $<ttype>2, $5); }
| expr_no_commas '=' expr_no_commas
{ char class;
$$ = build_modify_expr ($1, NOP_EXPR, $3);
class = TREE_CODE_CLASS (TREE_CODE ($$));
if (IS_EXPR_CODE_CLASS (class))
C_SET_EXP_ORIGINAL_CODE ($$, MODIFY_EXPR);
}
| expr_no_commas ASSIGN expr_no_commas
{ char class;
$$ = build_modify_expr ($1, $2, $3);
/* This inhibits warnings in
c_common_truthvalue_conversion. */
class = TREE_CODE_CLASS (TREE_CODE ($$));
if (IS_EXPR_CODE_CLASS (class))
C_SET_EXP_ORIGINAL_CODE ($$, ERROR_MARK);
}
;
primary:
IDENTIFIER
{
if (yychar == YYEMPTY)
yychar = YYLEX;
$$ = build_external_ref ($1, yychar == '(');
}
| CONSTANT
| STRING
{ $$ = fix_string_type ($$); }
| VAR_FUNC_NAME
{ $$ = fname_decl (C_RID_CODE ($$), $$); }
| '(' typename ')' '{'
{ start_init (NULL_TREE, NULL, 0);
$2 = groktypename ($2);
really_start_incremental_init ($2); }
initlist_maybe_comma '}' %prec UNARY
{ tree constructor = pop_init_level (0);
tree type = $2;
finish_init ();
if (pedantic && ! flag_isoc99)
pedwarn ("ISO C89 forbids compound literals");
$$ = build_compound_literal (type, constructor);
}
| '(' expr ')'
{ char class = TREE_CODE_CLASS (TREE_CODE ($2));
if (IS_EXPR_CODE_CLASS (class))
C_SET_EXP_ORIGINAL_CODE ($2, ERROR_MARK);
$$ = $2; }
| '(' error ')'
{ $$ = error_mark_node; }
| compstmt_primary_start compstmt_nostart ')'
{ tree saved_last_tree;
if (pedantic)
pedwarn ("ISO C forbids braced-groups within expressions");
pop_label_level ();
saved_last_tree = COMPOUND_BODY ($1);
RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
last_tree = saved_last_tree;
TREE_CHAIN (last_tree) = NULL_TREE;
if (!last_expr_type)
last_expr_type = void_type_node;
$$ = build1 (STMT_EXPR, last_expr_type, $1);
TREE_SIDE_EFFECTS ($$) = 1;
}
| compstmt_primary_start error ')'
{
pop_label_level ();
last_tree = COMPOUND_BODY ($1);
TREE_CHAIN (last_tree) = NULL_TREE;
$$ = error_mark_node;
}
| primary '(' exprlist ')' %prec '.'
{ $$ = build_function_call ($1, $3); }
| VA_ARG '(' expr_no_commas ',' typename ')'
{ $$ = build_va_arg ($3, groktypename ($5)); }
| CHOOSE_EXPR '(' expr_no_commas ',' expr_no_commas ',' expr_no_commas ')'
{
tree c;
c = fold ($3);
STRIP_NOPS (c);
if (TREE_CODE (c) != INTEGER_CST)
error ("first argument to __builtin_choose_expr not a constant");
$$ = integer_zerop (c) ? $7 : $5;
}
| TYPES_COMPATIBLE_P '(' typename ',' typename ')'
{
tree e1, e2;
e1 = TYPE_MAIN_VARIANT (groktypename ($3));
e2 = TYPE_MAIN_VARIANT (groktypename ($5));
$$ = comptypes (e1, e2)
? build_int_2 (1, 0) : build_int_2 (0, 0);
}
| primary '[' expr ']' %prec '.'
{ $$ = build_array_ref ($1, $3); }
| primary '.' identifier
{
ifobjc
if (!is_public ($1, $3))
$$ = error_mark_node;
else
end ifobjc
$$ = build_component_ref ($1, $3);
}
| primary POINTSAT identifier
{
tree expr = build_indirect_ref ($1, "->");
ifobjc
if (!is_public (expr, $3))
$$ = error_mark_node;
else
end ifobjc
$$ = build_component_ref (expr, $3);
}
| primary PLUSPLUS
{ $$ = build_unary_op (POSTINCREMENT_EXPR, $1, 0); }
| primary MINUSMINUS
{ $$ = build_unary_op (POSTDECREMENT_EXPR, $1, 0); }
ifobjc
| objcmessageexpr
{ $$ = build_message_expr ($1); }
| objcselectorexpr
{ $$ = build_selector_expr ($1); }
| objcprotocolexpr
{ $$ = build_protocol_expr ($1); }
| objcencodeexpr
{ $$ = build_encode_expr ($1); }
| objc_string
{ $$ = build_objc_string_object ($1); }
end ifobjc
;
ifobjc
/* Produces an STRING_CST with perhaps more STRING_CSTs chained
onto it, which is to be read as an ObjC string object. */
objc_string:
'@' STRING
{ $$ = $2; }
| objc_string '@' STRING
{ $$ = chainon ($1, $3); }
;
end ifobjc
old_style_parm_decls:
old_style_parm_decls_1
{
parsing_iso_function_signature = false; /* Reset after decls. */
}
;
old_style_parm_decls_1:
/* empty */
{
if (warn_traditional && !in_system_header
&& parsing_iso_function_signature)
warning ("traditional C rejects ISO C style function definitions");
parsing_iso_function_signature = false; /* Reset after warning. */
}
| datadecls
;
/* The following are analogous to lineno_decl, decls and decl
except that they do not allow nested functions.
They are used for old-style parm decls. */
lineno_datadecl:
save_filename save_lineno datadecl
{ }
;
datadecls:
lineno_datadecl
| errstmt
| datadecls lineno_datadecl
| lineno_datadecl errstmt
;
/* We don't allow prefix attributes here because they cause reduce/reduce
conflicts: we can't know whether we're parsing a function decl with
attribute suffix, or function defn with attribute prefix on first old
style parm. */
datadecl:
declspecs_ts_nosa setspecs initdecls ';'
{ POP_DECLSPEC_STACK; }
| declspecs_nots_nosa setspecs notype_initdecls ';'
{ POP_DECLSPEC_STACK; }
| declspecs_ts_nosa ';'
{ shadow_tag_warned ($1, 1);
pedwarn ("empty declaration"); }
| declspecs_nots_nosa ';'
{ pedwarn ("empty declaration"); }
;
/* This combination which saves a lineno before a decl
is the normal thing to use, rather than decl itself.
This is to avoid shift/reduce conflicts in contexts
where statement labels are allowed. */
lineno_decl:
save_filename save_lineno decl
{ }
;
/* records the type and storage class specs to use for processing
the declarators that follow.
Maintains a stack of outer-level values of current_declspecs,
for the sake of parm declarations nested in function declarators. */
setspecs: /* empty */
{ pending_xref_error ();
PUSH_DECLSPEC_STACK;
split_specs_attrs ($<ttype>0,
&current_declspecs, &prefix_attributes);
all_prefix_attributes = prefix_attributes; }
;
/* Possibly attributes after a comma, which should reset all_prefix_attributes
to prefix_attributes with these ones chained on the front. */
maybe_resetattrs:
maybe_attribute
{ all_prefix_attributes = chainon ($1, prefix_attributes); }
;
decl:
declspecs_ts setspecs initdecls ';'
{ POP_DECLSPEC_STACK; }
| declspecs_nots setspecs notype_initdecls ';'
{ POP_DECLSPEC_STACK; }
| declspecs_ts setspecs nested_function
{ POP_DECLSPEC_STACK; }
| declspecs_nots setspecs notype_nested_function
{ POP_DECLSPEC_STACK; }
| declspecs ';'
{ shadow_tag ($1); }
| extension decl
{ RESTORE_EXT_FLAGS ($1); }
;
/* A list of declaration specifiers. These are:
- Storage class specifiers (scspec), which for GCC currently includes
function specifiers ("inline").
- Type specifiers (typespec_*).
- Type qualifiers (TYPE_QUAL).
- Attribute specifier lists (attributes).
These are stored as a TREE_LIST; the head of the list is the last
item in the specifier list. Each entry in the list has either a
TREE_PURPOSE that is an attribute specifier list, or a TREE_VALUE that
is a single other specifier or qualifier; and a TREE_CHAIN that is the
rest of the list. TREE_STATIC is set on the list if something other
than a storage class specifier or attribute has been seen; this is used
to warn for the obsolescent usage of storage class specifiers other than
at the start of the list. (Doing this properly would require function
specifiers to be handled separately from storage class specifiers.)
The various cases below are classified according to:
(a) Whether a storage class specifier is included or not; some
places in the grammar disallow storage class specifiers (_sc or _nosc).
(b) Whether a type specifier has been seen; after a type specifier,
a typedef name is an identifier to redeclare (_ts or _nots).
(c) Whether the list starts with an attribute; in certain places,
the grammar requires specifiers that don't start with an attribute
(_sa or _nosa).
(d) Whether the list ends with an attribute (or a specifier such that
any following attribute would have been parsed as part of that specifier);
this avoids shift-reduce conflicts in the parsing of attributes
(_ea or _noea).
TODO:
(i) Distinguish between function specifiers and storage class specifiers,
at least for the purpose of warnings about obsolescent usage.
(ii) Halve the number of productions here by eliminating the _sc/_nosc
distinction and instead checking where required that storage class
specifiers aren't present. */
/* Declspecs which contain at least one type specifier or typedef name.
(Just `const' or `volatile' is not enough.)
A typedef'd name following these is taken as a name to be declared.
Declspecs have a non-NULL TREE_VALUE, attributes do not. */
declspecs_nosc_nots_nosa_noea:
TYPE_QUAL
{ $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
TREE_STATIC ($$) = 1; }
| declspecs_nosc_nots_nosa_noea TYPE_QUAL
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_nosc_nots_nosa_ea TYPE_QUAL
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
;
declspecs_nosc_nots_nosa_ea:
declspecs_nosc_nots_nosa_noea attributes
{ $$ = tree_cons ($2, NULL_TREE, $1);
TREE_STATIC ($$) = TREE_STATIC ($1); }
;
declspecs_nosc_nots_sa_noea:
declspecs_nosc_nots_sa_noea TYPE_QUAL
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_nosc_nots_sa_ea TYPE_QUAL
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
;
declspecs_nosc_nots_sa_ea:
attributes
{ $$ = tree_cons ($1, NULL_TREE, NULL_TREE);
TREE_STATIC ($$) = 0; }
| declspecs_nosc_nots_sa_noea attributes
{ $$ = tree_cons ($2, NULL_TREE, $1);
TREE_STATIC ($$) = TREE_STATIC ($1); }
;
declspecs_nosc_ts_nosa_noea:
typespec_nonattr
{ $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
TREE_STATIC ($$) = 1; }
| declspecs_nosc_ts_nosa_noea TYPE_QUAL
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_nosc_ts_nosa_ea TYPE_QUAL
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_nosc_ts_nosa_noea typespec_reserved_nonattr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_nosc_ts_nosa_ea typespec_reserved_nonattr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_nosc_nots_nosa_noea typespec_nonattr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_nosc_nots_nosa_ea typespec_nonattr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
;
declspecs_nosc_ts_nosa_ea:
typespec_attr
{ $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
TREE_STATIC ($$) = 1; }
| declspecs_nosc_ts_nosa_noea attributes
{ $$ = tree_cons ($2, NULL_TREE, $1);
TREE_STATIC ($$) = TREE_STATIC ($1); }
| declspecs_nosc_ts_nosa_noea typespec_reserved_attr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_nosc_ts_nosa_ea typespec_reserved_attr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_nosc_nots_nosa_noea typespec_attr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_nosc_nots_nosa_ea typespec_attr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
;
declspecs_nosc_ts_sa_noea:
declspecs_nosc_ts_sa_noea TYPE_QUAL
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_nosc_ts_sa_ea TYPE_QUAL
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_nosc_ts_sa_noea typespec_reserved_nonattr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_nosc_ts_sa_ea typespec_reserved_nonattr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_nosc_nots_sa_noea typespec_nonattr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_nosc_nots_sa_ea typespec_nonattr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
;
declspecs_nosc_ts_sa_ea:
declspecs_nosc_ts_sa_noea attributes
{ $$ = tree_cons ($2, NULL_TREE, $1);
TREE_STATIC ($$) = TREE_STATIC ($1); }
| declspecs_nosc_ts_sa_noea typespec_reserved_attr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_nosc_ts_sa_ea typespec_reserved_attr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_nosc_nots_sa_noea typespec_attr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_nosc_nots_sa_ea typespec_attr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
;
declspecs_sc_nots_nosa_noea:
scspec
{ $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
TREE_STATIC ($$) = 0; }
| declspecs_sc_nots_nosa_noea TYPE_QUAL
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_sc_nots_nosa_ea TYPE_QUAL
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_nosc_nots_nosa_noea scspec
{ if (extra_warnings && TREE_STATIC ($1))
warning ("`%s' is not at beginning of declaration",
IDENTIFIER_POINTER ($2));
$$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = TREE_STATIC ($1); }
| declspecs_nosc_nots_nosa_ea scspec
{ if (extra_warnings && TREE_STATIC ($1))
warning ("`%s' is not at beginning of declaration",
IDENTIFIER_POINTER ($2));
$$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = TREE_STATIC ($1); }
| declspecs_sc_nots_nosa_noea scspec
{ if (extra_warnings && TREE_STATIC ($1))
warning ("`%s' is not at beginning of declaration",
IDENTIFIER_POINTER ($2));
$$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = TREE_STATIC ($1); }
| declspecs_sc_nots_nosa_ea scspec
{ if (extra_warnings && TREE_STATIC ($1))
warning ("`%s' is not at beginning of declaration",
IDENTIFIER_POINTER ($2));
$$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = TREE_STATIC ($1); }
;
declspecs_sc_nots_nosa_ea:
declspecs_sc_nots_nosa_noea attributes
{ $$ = tree_cons ($2, NULL_TREE, $1);
TREE_STATIC ($$) = TREE_STATIC ($1); }
;
declspecs_sc_nots_sa_noea:
declspecs_sc_nots_sa_noea TYPE_QUAL
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_sc_nots_sa_ea TYPE_QUAL
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_nosc_nots_sa_noea scspec
{ if (extra_warnings && TREE_STATIC ($1))
warning ("`%s' is not at beginning of declaration",
IDENTIFIER_POINTER ($2));
$$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = TREE_STATIC ($1); }
| declspecs_nosc_nots_sa_ea scspec
{ if (extra_warnings && TREE_STATIC ($1))
warning ("`%s' is not at beginning of declaration",
IDENTIFIER_POINTER ($2));
$$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = TREE_STATIC ($1); }
| declspecs_sc_nots_sa_noea scspec
{ if (extra_warnings && TREE_STATIC ($1))
warning ("`%s' is not at beginning of declaration",
IDENTIFIER_POINTER ($2));
$$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = TREE_STATIC ($1); }
| declspecs_sc_nots_sa_ea scspec
{ if (extra_warnings && TREE_STATIC ($1))
warning ("`%s' is not at beginning of declaration",
IDENTIFIER_POINTER ($2));
$$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = TREE_STATIC ($1); }
;
declspecs_sc_nots_sa_ea:
declspecs_sc_nots_sa_noea attributes
{ $$ = tree_cons ($2, NULL_TREE, $1);
TREE_STATIC ($$) = TREE_STATIC ($1); }
;
declspecs_sc_ts_nosa_noea:
declspecs_sc_ts_nosa_noea TYPE_QUAL
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_sc_ts_nosa_ea TYPE_QUAL
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_sc_ts_nosa_noea typespec_reserved_nonattr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_sc_ts_nosa_ea typespec_reserved_nonattr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_sc_nots_nosa_noea typespec_nonattr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_sc_nots_nosa_ea typespec_nonattr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_nosc_ts_nosa_noea scspec
{ if (extra_warnings && TREE_STATIC ($1))
warning ("`%s' is not at beginning of declaration",
IDENTIFIER_POINTER ($2));
$$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = TREE_STATIC ($1); }
| declspecs_nosc_ts_nosa_ea scspec
{ if (extra_warnings && TREE_STATIC ($1))
warning ("`%s' is not at beginning of declaration",
IDENTIFIER_POINTER ($2));
$$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = TREE_STATIC ($1); }
| declspecs_sc_ts_nosa_noea scspec
{ if (extra_warnings && TREE_STATIC ($1))
warning ("`%s' is not at beginning of declaration",
IDENTIFIER_POINTER ($2));
$$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = TREE_STATIC ($1); }
| declspecs_sc_ts_nosa_ea scspec
{ if (extra_warnings && TREE_STATIC ($1))
warning ("`%s' is not at beginning of declaration",
IDENTIFIER_POINTER ($2));
$$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = TREE_STATIC ($1); }
;
declspecs_sc_ts_nosa_ea:
declspecs_sc_ts_nosa_noea attributes
{ $$ = tree_cons ($2, NULL_TREE, $1);
TREE_STATIC ($$) = TREE_STATIC ($1); }
| declspecs_sc_ts_nosa_noea typespec_reserved_attr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_sc_ts_nosa_ea typespec_reserved_attr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_sc_nots_nosa_noea typespec_attr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_sc_nots_nosa_ea typespec_attr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
;
declspecs_sc_ts_sa_noea:
declspecs_sc_ts_sa_noea TYPE_QUAL
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_sc_ts_sa_ea TYPE_QUAL
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_sc_ts_sa_noea typespec_reserved_nonattr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_sc_ts_sa_ea typespec_reserved_nonattr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_sc_nots_sa_noea typespec_nonattr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_sc_nots_sa_ea typespec_nonattr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_nosc_ts_sa_noea scspec
{ if (extra_warnings && TREE_STATIC ($1))
warning ("`%s' is not at beginning of declaration",
IDENTIFIER_POINTER ($2));
$$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = TREE_STATIC ($1); }
| declspecs_nosc_ts_sa_ea scspec
{ if (extra_warnings && TREE_STATIC ($1))
warning ("`%s' is not at beginning of declaration",
IDENTIFIER_POINTER ($2));
$$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = TREE_STATIC ($1); }
| declspecs_sc_ts_sa_noea scspec
{ if (extra_warnings && TREE_STATIC ($1))
warning ("`%s' is not at beginning of declaration",
IDENTIFIER_POINTER ($2));
$$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = TREE_STATIC ($1); }
| declspecs_sc_ts_sa_ea scspec
{ if (extra_warnings && TREE_STATIC ($1))
warning ("`%s' is not at beginning of declaration",
IDENTIFIER_POINTER ($2));
$$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = TREE_STATIC ($1); }
;
declspecs_sc_ts_sa_ea:
declspecs_sc_ts_sa_noea attributes
{ $$ = tree_cons ($2, NULL_TREE, $1);
TREE_STATIC ($$) = TREE_STATIC ($1); }
| declspecs_sc_ts_sa_noea typespec_reserved_attr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_sc_ts_sa_ea typespec_reserved_attr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_sc_nots_sa_noea typespec_attr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
| declspecs_sc_nots_sa_ea typespec_attr
{ $$ = tree_cons (NULL_TREE, $2, $1);
TREE_STATIC ($$) = 1; }
;
/* Particular useful classes of declspecs. */
declspecs_ts:
declspecs_nosc_ts_nosa_noea
| declspecs_nosc_ts_nosa_ea
| declspecs_nosc_ts_sa_noea
| declspecs_nosc_ts_sa_ea
| declspecs_sc_ts_nosa_noea
| declspecs_sc_ts_nosa_ea
| declspecs_sc_ts_sa_noea
| declspecs_sc_ts_sa_ea
;
declspecs_nots:
declspecs_nosc_nots_nosa_noea
| declspecs_nosc_nots_nosa_ea
| declspecs_nosc_nots_sa_noea
| declspecs_nosc_nots_sa_ea
| declspecs_sc_nots_nosa_noea
| declspecs_sc_nots_nosa_ea
| declspecs_sc_nots_sa_noea
| declspecs_sc_nots_sa_ea
;
declspecs_ts_nosa:
declspecs_nosc_ts_nosa_noea
| declspecs_nosc_ts_nosa_ea
| declspecs_sc_ts_nosa_noea
| declspecs_sc_ts_nosa_ea
;
declspecs_nots_nosa:
declspecs_nosc_nots_nosa_noea
| declspecs_nosc_nots_nosa_ea
| declspecs_sc_nots_nosa_noea
| declspecs_sc_nots_nosa_ea
;
declspecs_nosc_ts:
declspecs_nosc_ts_nosa_noea
| declspecs_nosc_ts_nosa_ea
| declspecs_nosc_ts_sa_noea
| declspecs_nosc_ts_sa_ea
;
declspecs_nosc_nots:
declspecs_nosc_nots_nosa_noea
| declspecs_nosc_nots_nosa_ea
| declspecs_nosc_nots_sa_noea
| declspecs_nosc_nots_sa_ea
;
declspecs_nosc:
declspecs_nosc_ts_nosa_noea
| declspecs_nosc_ts_nosa_ea
| declspecs_nosc_ts_sa_noea
| declspecs_nosc_ts_sa_ea
| declspecs_nosc_nots_nosa_noea
| declspecs_nosc_nots_nosa_ea
| declspecs_nosc_nots_sa_noea
| declspecs_nosc_nots_sa_ea
;
declspecs:
declspecs_nosc_nots_nosa_noea
| declspecs_nosc_nots_nosa_ea
| declspecs_nosc_nots_sa_noea
| declspecs_nosc_nots_sa_ea
| declspecs_nosc_ts_nosa_noea
| declspecs_nosc_ts_nosa_ea
| declspecs_nosc_ts_sa_noea
| declspecs_nosc_ts_sa_ea
| declspecs_sc_nots_nosa_noea
| declspecs_sc_nots_nosa_ea
| declspecs_sc_nots_sa_noea
| declspecs_sc_nots_sa_ea
| declspecs_sc_ts_nosa_noea
| declspecs_sc_ts_nosa_ea
| declspecs_sc_ts_sa_noea
| declspecs_sc_ts_sa_ea
;
/* A (possibly empty) sequence of type qualifiers and attributes. */
maybe_type_quals_attrs:
/* empty */
{ $$ = NULL_TREE; }
| declspecs_nosc_nots
{ $$ = $1; }
;
/* A type specifier (but not a type qualifier).
Once we have seen one of these in a declaration,
if a typedef name appears then it is being redeclared.
The _reserved versions start with a reserved word and may appear anywhere
in the declaration specifiers; the _nonreserved versions may only
appear before any other type specifiers, and after that are (if names)
being redeclared.
FIXME: should the _nonreserved version be restricted to names being
redeclared only? The other entries there relate only the GNU extensions
and Objective C, and are historically parsed thus, and don't make sense
after other type specifiers, but it might be cleaner to count them as
_reserved.
_attr means: specifiers that either end with attributes,
or are such that any following attributes would
be parsed as part of the specifier.
_nonattr: specifiers. */
typespec_nonattr:
typespec_reserved_nonattr
| typespec_nonreserved_nonattr
;
typespec_attr:
typespec_reserved_attr
;
typespec_reserved_nonattr:
TYPESPEC
{ OBJC_NEED_RAW_IDENTIFIER (1); }
| structsp_nonattr
;
typespec_reserved_attr:
structsp_attr
;
typespec_nonreserved_nonattr:
TYPENAME
{ /* For a typedef name, record the meaning, not the name.
In case of `foo foo, bar;'. */
$$ = lookup_name ($1); }
ifobjc
| CLASSNAME protocolrefs
{ $$ = get_static_reference ($1, $2); }
| OBJECTNAME protocolrefs
{ $$ = get_object_reference ($2); }
/* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>"
- nisse@lysator.liu.se */
| non_empty_protocolrefs
{ $$ = get_object_reference ($1); }
end ifobjc
| typeof '(' expr ')'
{ skip_evaluation--; $$ = TREE_TYPE ($3); }
| typeof '(' typename ')'
{ skip_evaluation--; $$ = groktypename ($3); }
;
/* typespec_nonreserved_attr does not exist. */
initdecls:
initdcl
| initdecls ',' maybe_resetattrs initdcl
;
notype_initdecls:
notype_initdcl
| notype_initdecls ',' maybe_resetattrs notype_initdcl
;
maybeasm:
/* empty */
{ $$ = NULL_TREE; }
| ASM_KEYWORD '(' STRING ')'
{ $$ = $3; }
;
initdcl:
declarator maybeasm maybe_attribute '='
{ $<ttype>$ = start_decl ($1, current_declspecs, 1,
chainon ($3, all_prefix_attributes));
start_init ($<ttype>$, $2, global_bindings_p ()); }
init
/* Note how the declaration of the variable is in effect while its init is parsed! */
{ finish_init ();
finish_decl ($<ttype>5, $6, $2); }
| declarator maybeasm maybe_attribute
{ tree d = start_decl ($1, current_declspecs, 0,
chainon ($3, all_prefix_attributes));
finish_decl (d, NULL_TREE, $2);
}
;
notype_initdcl:
notype_declarator maybeasm maybe_attribute '='
{ $<ttype>$ = start_decl ($1, current_declspecs, 1,
chainon ($3, all_prefix_attributes));
start_init ($<ttype>$, $2, global_bindings_p ()); }
init
/* Note how the declaration of the variable is in effect while its init is parsed! */
{ finish_init ();
finish_decl ($<ttype>5, $6, $2); }
| notype_declarator maybeasm maybe_attribute
{ tree d = start_decl ($1, current_declspecs, 0,
chainon ($3, all_prefix_attributes));
finish_decl (d, NULL_TREE, $2); }
;
/* the * rules are dummies to accept the Apollo extended syntax
so that the header files compile. */
maybe_attribute:
/* empty */
{ $$ = NULL_TREE; }
| attributes
{ $$ = $1; }
;
attributes:
attribute
{ $$ = $1; }
| attributes attribute
{ $$ = chainon ($1, $2); }
;
attribute:
ATTRIBUTE '(' '(' attribute_list ')' ')'
{ $$ = $4; }
;
attribute_list:
attrib
{ $$ = $1; }
| attribute_list ',' attrib
{ $$ = chainon ($1, $3); }
;
attrib:
/* empty */
{ $$ = NULL_TREE; }
| any_word
{ $$ = build_tree_list ($1, NULL_TREE); }
| any_word '(' IDENTIFIER ')'
{ $$ = build_tree_list ($1, build_tree_list (NULL_TREE, $3)); }
| any_word '(' IDENTIFIER ',' nonnull_exprlist ')'
{ $$ = build_tree_list ($1, tree_cons (NULL_TREE, $3, $5)); }
| any_word '(' exprlist ')'
{ $$ = build_tree_list ($1, $3); }
;
/* This still leaves out most reserved keywords,
shouldn't we include them? */
any_word:
identifier
| scspec
| TYPESPEC
| TYPE_QUAL
;
scspec:
STATIC
| SCSPEC
;
/* Initializers. `init' is the entry point. */
init:
expr_no_commas
| '{'
{ really_start_incremental_init (NULL_TREE); }
initlist_maybe_comma '}'
{ $$ = pop_init_level (0); }
| error
{ $$ = error_mark_node; }
;
/* `initlist_maybe_comma' is the guts of an initializer in braces. */
initlist_maybe_comma:
/* empty */
{ if (pedantic)
pedwarn ("ISO C forbids empty initializer braces"); }
| initlist1 maybecomma
;
initlist1:
initelt
| initlist1 ',' initelt
;
/* `initelt' is a single element of an initializer.
It may use braces. */
initelt:
designator_list '=' initval
{ if (pedantic && ! flag_isoc99)
pedwarn ("ISO C89 forbids specifying subobject to initialize"); }
| designator initval
{ if (pedantic)
pedwarn ("obsolete use of designated initializer without `='"); }
| identifier ':'
{ set_init_label ($1);
if (pedantic)
pedwarn ("obsolete use of designated initializer with `:'"); }
initval
{}
| initval
;
initval:
'{'
{ push_init_level (0); }
initlist_maybe_comma '}'
{ process_init_element (pop_init_level (0)); }
| expr_no_commas
{ process_init_element ($1); }
| error
;
designator_list:
designator
| designator_list designator
;
designator:
'.' identifier
{ set_init_label ($2); }
| '[' expr_no_commas ELLIPSIS expr_no_commas ']'
{ set_init_index ($2, $4);
if (pedantic)
pedwarn ("ISO C forbids specifying range of elements to initialize"); }
| '[' expr_no_commas ']'
{ set_init_index ($2, NULL_TREE); }
;
nested_function:
declarator
{ if (pedantic)
pedwarn ("ISO C forbids nested functions");
push_function_context ();
if (! start_function (current_declspecs, $1,
all_prefix_attributes))
{
pop_function_context ();
YYERROR1;
}
parsing_iso_function_signature = false; /* Don't warn about nested functions. */
}
old_style_parm_decls
{ store_parm_decls (); }
/* This used to use compstmt_or_error.
That caused a bug with input `f(g) int g {}',
where the use of YYERROR1 above caused an error
which then was handled by compstmt_or_error.
There followed a repeated execution of that same rule,
which called YYERROR1 again, and so on. */
save_filename save_lineno compstmt
{ tree decl = current_function_decl;
DECL_SOURCE_FILE (decl) = $5;
DECL_SOURCE_LINE (decl) = $6;
finish_function (1, 1);
pop_function_context ();
add_decl_stmt (decl); }
;
notype_nested_function:
notype_declarator
{ if (pedantic)
pedwarn ("ISO C forbids nested functions");
push_function_context ();
if (! start_function (current_declspecs, $1,
all_prefix_attributes))
{
pop_function_context ();
YYERROR1;
}
parsing_iso_function_signature = false; /* Don't warn about nested functions. */
}
old_style_parm_decls
{ store_parm_decls (); }
/* This used to use compstmt_or_error.
That caused a bug with input `f(g) int g {}',
where the use of YYERROR1 above caused an error
which then was handled by compstmt_or_error.
There followed a repeated execution of that same rule,
which called YYERROR1 again, and so on. */
save_filename save_lineno compstmt
{ tree decl = current_function_decl;
DECL_SOURCE_FILE (decl) = $5;
DECL_SOURCE_LINE (decl) = $6;
finish_function (1, 1);
pop_function_context ();
add_decl_stmt (decl); }
;
/* Any kind of declarator (thus, all declarators allowed
after an explicit typespec). */
declarator:
after_type_declarator
| notype_declarator
;
/* A declarator that is allowed only after an explicit typespec. */
after_type_declarator:
'(' maybe_attribute after_type_declarator ')'
{ $$ = $2 ? tree_cons ($2, $3, NULL_TREE) : $3; }
| after_type_declarator '(' parmlist_or_identifiers %prec '.'
{ $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
/* | after_type_declarator '(' error ')' %prec '.'
{ $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
poplevel (0, 0, 0); } */
| after_type_declarator array_declarator %prec '.'
{ $$ = set_array_declarator_type ($2, $1, 0); }
| '*' maybe_type_quals_attrs after_type_declarator %prec UNARY
{ $$ = make_pointer_declarator ($2, $3); }
| TYPENAME
ifobjc
| OBJECTNAME
end ifobjc
;
/* Kinds of declarator that can appear in a parameter list
in addition to notype_declarator. This is like after_type_declarator
but does not allow a typedef name in parentheses as an identifier
(because it would conflict with a function with that typedef as arg). */
parm_declarator:
parm_declarator_starttypename
| parm_declarator_nostarttypename
;
parm_declarator_starttypename:
parm_declarator_starttypename '(' parmlist_or_identifiers %prec '.'
{ $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
/* | parm_declarator_starttypename '(' error ')' %prec '.'
{ $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
poplevel (0, 0, 0); } */
| parm_declarator_starttypename array_declarator %prec '.'
{ $$ = set_array_declarator_type ($2, $1, 0); }
| TYPENAME
ifobjc
| OBJECTNAME
end ifobjc
;
parm_declarator_nostarttypename:
parm_declarator_nostarttypename '(' parmlist_or_identifiers %prec '.'
{ $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
/* | parm_declarator_nostarttypename '(' error ')' %prec '.'
{ $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
poplevel (0, 0, 0); } */
| parm_declarator_nostarttypename array_declarator %prec '.'
{ $$ = set_array_declarator_type ($2, $1, 0); }
| '*' maybe_type_quals_attrs parm_declarator_starttypename %prec UNARY
{ $$ = make_pointer_declarator ($2, $3); }
| '*' maybe_type_quals_attrs parm_declarator_nostarttypename %prec UNARY
{ $$ = make_pointer_declarator ($2, $3); }
| '(' maybe_attribute parm_declarator_nostarttypename ')'
{ $$ = $2 ? tree_cons ($2, $3, NULL_TREE) : $3; }
;
/* A declarator allowed whether or not there has been
an explicit typespec. These cannot redeclare a typedef-name. */
notype_declarator:
notype_declarator '(' parmlist_or_identifiers %prec '.'
{ $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
/* | notype_declarator '(' error ')' %prec '.'
{ $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
poplevel (0, 0, 0); } */
| '(' maybe_attribute notype_declarator ')'
{ $$ = $2 ? tree_cons ($2, $3, NULL_TREE) : $3; }
| '*' maybe_type_quals_attrs notype_declarator %prec UNARY
{ $$ = make_pointer_declarator ($2, $3); }
| notype_declarator array_declarator %prec '.'
{ $$ = set_array_declarator_type ($2, $1, 0); }
| IDENTIFIER
;
struct_head:
STRUCT
{ $$ = NULL_TREE; }
| STRUCT attributes
{ $$ = $2; }
;
union_head:
UNION
{ $$ = NULL_TREE; }
| UNION attributes
{ $$ = $2; }
;
enum_head:
ENUM
{ $$ = NULL_TREE; }
| ENUM attributes
{ $$ = $2; }
;
/* structsp_attr: struct/union/enum specifiers that either
end with attributes, or are such that any following attributes would
be parsed as part of the struct/union/enum specifier.
structsp_nonattr: other struct/union/enum specifiers. */
structsp_attr:
struct_head identifier '{'
{ $$ = start_struct (RECORD_TYPE, $2);
/* Start scope of tag before parsing components. */
}
component_decl_list '}' maybe_attribute
{ $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
| struct_head '{' component_decl_list '}' maybe_attribute
{ $$ = finish_struct (start_struct (RECORD_TYPE, NULL_TREE),
$3, chainon ($1, $5));
}
| union_head identifier '{'
{ $$ = start_struct (UNION_TYPE, $2); }
component_decl_list '}' maybe_attribute
{ $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
| union_head '{' component_decl_list '}' maybe_attribute
{ $$ = finish_struct (start_struct (UNION_TYPE, NULL_TREE),
$3, chainon ($1, $5));
}
| enum_head identifier '{'
{ $$ = start_enum ($2); }
enumlist maybecomma_warn '}' maybe_attribute
{ $$ = finish_enum ($<ttype>4, nreverse ($5),
chainon ($1, $8)); }
| enum_head '{'
{ $$ = start_enum (NULL_TREE); }
enumlist maybecomma_warn '}' maybe_attribute
{ $$ = finish_enum ($<ttype>3, nreverse ($4),
chainon ($1, $7)); }
;
structsp_nonattr:
struct_head identifier
{ $$ = xref_tag (RECORD_TYPE, $2); }
| union_head identifier
{ $$ = xref_tag (UNION_TYPE, $2); }
| enum_head identifier
{ $$ = xref_tag (ENUMERAL_TYPE, $2);
/* In ISO C, enumerated types can be referred to
only if already defined. */
if (pedantic && !COMPLETE_TYPE_P ($$))
pedwarn ("ISO C forbids forward references to `enum' types"); }
;
maybecomma:
/* empty */
| ','
;
maybecomma_warn:
/* empty */
| ','
{ if (pedantic && ! flag_isoc99)
pedwarn ("comma at end of enumerator list"); }
;
component_decl_list:
component_decl_list2
{ $$ = $1; }
| component_decl_list2 component_decl
{ $$ = chainon ($1, $2);
pedwarn ("no semicolon at end of struct or union"); }
;
component_decl_list2: /* empty */
{ $$ = NULL_TREE; }
| component_decl_list2 component_decl ';'
{ $$ = chainon ($1, $2); }
| component_decl_list2 ';'
{ if (pedantic)
pedwarn ("extra semicolon in struct or union specified"); }
ifobjc
/* foo(sizeof(struct{ @defs(ClassName)})); */
| DEFS '(' CLASSNAME ')'
{
tree interface = lookup_interface ($3);
if (interface)
$$ = get_class_ivars (interface);
else
{
error ("cannot find interface declaration for `%s'",
IDENTIFIER_POINTER ($3));
$$ = NULL_TREE;
}
}
end ifobjc
;
component_decl:
declspecs_nosc_ts setspecs components
{ $$ = $3;
POP_DECLSPEC_STACK; }
| declspecs_nosc_ts setspecs save_filename save_lineno
{
/* Support for unnamed structs or unions as members of
structs or unions (which is [a] useful and [b] supports
MS P-SDK). */
if (pedantic)
pedwarn ("ISO C doesn't support unnamed structs/unions");
$$ = grokfield($3, $4, NULL, current_declspecs, NULL_TREE);
POP_DECLSPEC_STACK; }
| declspecs_nosc_nots setspecs components_notype
{ $$ = $3;
POP_DECLSPEC_STACK; }
| declspecs_nosc_nots
{ if (pedantic)
pedwarn ("ISO C forbids member declarations with no members");
shadow_tag($1);
$$ = NULL_TREE; }
| error
{ $$ = NULL_TREE; }
| extension component_decl
{ $$ = $2;
RESTORE_EXT_FLAGS ($1); }
;
components:
component_declarator
| components ',' maybe_resetattrs component_declarator
{ $$ = chainon ($1, $4); }
;
components_notype:
component_notype_declarator
| components_notype ',' maybe_resetattrs component_notype_declarator
{ $$ = chainon ($1, $4); }
;
component_declarator:
save_filename save_lineno declarator maybe_attribute
{ $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
decl_attributes (&$$, chainon ($4, all_prefix_attributes), 0); }
| save_filename save_lineno
declarator ':' expr_no_commas maybe_attribute
{ $$ = grokfield ($1, $2, $3, current_declspecs, $5);
decl_attributes (&$$, chainon ($6, all_prefix_attributes), 0); }
| save_filename save_lineno ':' expr_no_commas maybe_attribute
{ $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
decl_attributes (&$$, chainon ($5, all_prefix_attributes), 0); }
;
component_notype_declarator:
save_filename save_lineno notype_declarator maybe_attribute
{ $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
decl_attributes (&$$, chainon ($4, all_prefix_attributes), 0); }
| save_filename save_lineno
notype_declarator ':' expr_no_commas maybe_attribute
{ $$ = grokfield ($1, $2, $3, current_declspecs, $5);
decl_attributes (&$$, chainon ($6, all_prefix_attributes), 0); }
| save_filename save_lineno ':' expr_no_commas maybe_attribute
{ $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
decl_attributes (&$$, chainon ($5, all_prefix_attributes), 0); }
;
/* We chain the enumerators in reverse order.
They are put in forward order where enumlist is used.
(The order used to be significant, but no longer is so.
However, we still maintain the order, just to be clean.) */
enumlist:
enumerator
| enumlist ',' enumerator
{ if ($1 == error_mark_node)
$$ = $1;
else
$$ = chainon ($3, $1); }
| error
{ $$ = error_mark_node; }
;
enumerator:
identifier
{ $$ = build_enumerator ($1, NULL_TREE); }
| identifier '=' expr_no_commas
{ $$ = build_enumerator ($1, $3); }
;
typename:
declspecs_nosc
{ pending_xref_error ();
$<ttype>$ = $1; }
absdcl
{ $$ = build_tree_list ($<ttype>2, $3); }
;
absdcl: /* an absolute declarator */
/* empty */
{ $$ = NULL_TREE; }
| absdcl1
;
absdcl_maybe_attribute: /* absdcl maybe_attribute, but not just attributes */
/* empty */
{ $$ = build_tree_list (build_tree_list (current_declspecs,
NULL_TREE),
all_prefix_attributes); }
| absdcl1
{ $$ = build_tree_list (build_tree_list (current_declspecs,
$1),
all_prefix_attributes); }
| absdcl1_noea attributes
{ $$ = build_tree_list (build_tree_list (current_declspecs,
$1),
chainon ($2, all_prefix_attributes)); }
;
absdcl1: /* a nonempty absolute declarator */
absdcl1_ea
| absdcl1_noea
;
absdcl1_noea:
direct_absdcl1
| '*' maybe_type_quals_attrs absdcl1_noea
{ $$ = make_pointer_declarator ($2, $3); }
;
absdcl1_ea:
'*' maybe_type_quals_attrs
{ $$ = make_pointer_declarator ($2, NULL_TREE); }
| '*' maybe_type_quals_attrs absdcl1_ea
{ $$ = make_pointer_declarator ($2, $3); }
;
direct_absdcl1:
'(' maybe_attribute absdcl1 ')'
{ $$ = $2 ? tree_cons ($2, $3, NULL_TREE) : $3; }
| direct_absdcl1 '(' parmlist
{ $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
| direct_absdcl1 array_declarator
{ $$ = set_array_declarator_type ($2, $1, 1); }
| '(' parmlist
{ $$ = build_nt (CALL_EXPR, NULL_TREE, $2, NULL_TREE); }
| array_declarator
{ $$ = set_array_declarator_type ($1, NULL_TREE, 1); }
;
/* The [...] part of a declarator for an array type. */
array_declarator:
'[' maybe_type_quals_attrs expr ']'
{ $$ = build_array_declarator ($3, $2, 0, 0); }
| '[' maybe_type_quals_attrs ']'
{ $$ = build_array_declarator (NULL_TREE, $2, 0, 0); }
| '[' maybe_type_quals_attrs '*' ']'
{ $$ = build_array_declarator (NULL_TREE, $2, 0, 1); }
| '[' STATIC maybe_type_quals_attrs expr ']'
{ $$ = build_array_declarator ($4, $3, 1, 0); }
/* declspecs_nosc_nots is a synonym for type_quals_attrs. */
| '[' declspecs_nosc_nots STATIC expr ']'
{ $$ = build_array_declarator ($4, $2, 1, 0); }
;
/* A nonempty series of declarations and statements (possibly followed by
some labels) that can form the body of a compound statement.
NOTE: we don't allow labels on declarations; this might seem like a
natural extension, but there would be a conflict between attributes
on the label and prefix attributes on the declaration. */
stmts_and_decls:
lineno_stmt_decl_or_labels_ending_stmt
| lineno_stmt_decl_or_labels_ending_decl
| lineno_stmt_decl_or_labels_ending_label
{
pedwarn ("deprecated use of label at end of compound statement");
}
| lineno_stmt_decl_or_labels_ending_error
;
lineno_stmt_decl_or_labels_ending_stmt:
lineno_stmt
| lineno_stmt_decl_or_labels_ending_stmt lineno_stmt
| lineno_stmt_decl_or_labels_ending_decl lineno_stmt
| lineno_stmt_decl_or_labels_ending_label lineno_stmt
| lineno_stmt_decl_or_labels_ending_error lineno_stmt
;
lineno_stmt_decl_or_labels_ending_decl:
lineno_decl
| lineno_stmt_decl_or_labels_ending_stmt lineno_decl
{ if (pedantic && !flag_isoc99)
pedwarn ("ISO C89 forbids mixed declarations and code"); }
| lineno_stmt_decl_or_labels_ending_decl lineno_decl
| lineno_stmt_decl_or_labels_ending_error lineno_decl
;
lineno_stmt_decl_or_labels_ending_label:
lineno_label
| lineno_stmt_decl_or_labels_ending_stmt lineno_label
| lineno_stmt_decl_or_labels_ending_decl lineno_label
| lineno_stmt_decl_or_labels_ending_label lineno_label
| lineno_stmt_decl_or_labels_ending_error lineno_label
;
lineno_stmt_decl_or_labels_ending_error:
errstmt
| lineno_stmt_decl_or_labels errstmt
;
lineno_stmt_decl_or_labels:
lineno_stmt_decl_or_labels_ending_stmt
| lineno_stmt_decl_or_labels_ending_decl
| lineno_stmt_decl_or_labels_ending_label
| lineno_stmt_decl_or_labels_ending_error
;
errstmt: error ';'
;
pushlevel: /* empty */
{ pushlevel (0);
clear_last_expr ();
add_scope_stmt (/*begin_p=*/1, /*partial_p=*/0);
ifobjc
if (objc_method_context)
add_objc_decls ();
end ifobjc
}
;
poplevel: /* empty */
{ $$ = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/0); }
;
/* Start and end blocks created for the new scopes of C99. */
c99_block_start: /* empty */
{ if (flag_isoc99)
{
$$ = c_begin_compound_stmt ();
pushlevel (0);
clear_last_expr ();
add_scope_stmt (/*begin_p=*/1, /*partial_p=*/0);
ifobjc
if (objc_method_context)
add_objc_decls ();
end ifobjc
}
else
$$ = NULL_TREE;
}
;
/* Productions using c99_block_start and c99_block_end will need to do what's
in compstmt: RECHAIN_STMTS ($1, COMPOUND_BODY ($1)); $$ = $2; where
$1 is the value of c99_block_start and $2 of c99_block_end. */
c99_block_end: /* empty */
{ if (flag_isoc99)
{
tree scope_stmt = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/0);
$$ = poplevel (kept_level_p (), 0, 0);
SCOPE_STMT_BLOCK (TREE_PURPOSE (scope_stmt))
= SCOPE_STMT_BLOCK (TREE_VALUE (scope_stmt))
= $$;
}
else
$$ = NULL_TREE; }
;
/* Read zero or more forward-declarations for labels
that nested functions can jump to. */
maybe_label_decls:
/* empty */
| label_decls
{ if (pedantic)
pedwarn ("ISO C forbids label declarations"); }
;
label_decls:
label_decl
| label_decls label_decl
;
label_decl:
LABEL identifiers_or_typenames ';'
{ tree link;
for (link = $2; link; link = TREE_CHAIN (link))
{
tree label = shadow_label (TREE_VALUE (link));
C_DECLARED_LABEL_FLAG (label) = 1;
add_decl_stmt (label);
}
}
;
/* This is the body of a function definition.
It causes syntax errors to ignore to the next openbrace. */
compstmt_or_error:
compstmt
{}
| error compstmt
;
compstmt_start: '{' { compstmt_count++;
$$ = c_begin_compound_stmt (); }
;
compstmt_nostart: '}'
{ $$ = convert (void_type_node, integer_zero_node); }
| pushlevel maybe_label_decls compstmt_contents_nonempty '}' poplevel
{ $$ = poplevel (kept_level_p (), 1, 0);
SCOPE_STMT_BLOCK (TREE_PURPOSE ($5))
= SCOPE_STMT_BLOCK (TREE_VALUE ($5))
= $$; }
;
compstmt_contents_nonempty:
stmts_and_decls
| error
;
compstmt_primary_start:
'(' '{'
{ if (current_function_decl == 0)
{
error ("braced-group within expression allowed only inside a function");
YYERROR;
}
/* We must force a BLOCK for this level
so that, if it is not expanded later,
there is a way to turn off the entire subtree of blocks
that are contained in it. */
keep_next_level ();
push_label_level ();
compstmt_count++;
$$ = add_stmt (build_stmt (COMPOUND_STMT, last_tree));
}
;
compstmt: compstmt_start compstmt_nostart
{ RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
last_expr_type = NULL_TREE;
$$ = $1; }
;
/* Value is number of statements counted as of the closeparen. */
simple_if:
if_prefix c99_block_lineno_labeled_stmt
{ c_finish_then (); }
/* Make sure c_expand_end_cond is run once
for each call to c_expand_start_cond.
Otherwise a crash is likely. */
| if_prefix error
;
if_prefix:
/* We must build the IF_STMT node before parsing its
condition so that STMT_LINENO refers to the line
containing the "if", and not the line containing
the close-parenthesis.
c_begin_if_stmt returns the IF_STMT node, which
we later pass to c_expand_start_cond to fill
in the condition and other tidbits. */
IF
{ $<ttype>$ = c_begin_if_stmt (); }
'(' expr ')'
{ c_expand_start_cond (c_common_truthvalue_conversion ($4),
compstmt_count,$<ttype>2);
$<itype>$ = stmt_count;
if_stmt_file = $<filename>-2;
if_stmt_line = $<lineno>-1; }
;
/* This is a subroutine of stmt.
It is used twice, once for valid DO statements
and once for catching errors in parsing the end test. */
do_stmt_start:
DO
{ stmt_count++;
compstmt_count++;
$<ttype>$
= add_stmt (build_stmt (DO_STMT, NULL_TREE,
NULL_TREE));
/* In the event that a parse error prevents
parsing the complete do-statement, set the
condition now. Otherwise, we can get crashes at
RTL-generation time. */
DO_COND ($<ttype>$) = error_mark_node; }
c99_block_lineno_labeled_stmt WHILE
{ $$ = $<ttype>2;
RECHAIN_STMTS ($$, DO_BODY ($$)); }
;
/* The forced readahead in here is because we might be at the end of a
line, and the line and file won't be bumped until yylex absorbs the
first token on the next line. */
save_filename:
{ if (yychar == YYEMPTY)
yychar = YYLEX;
$$ = input_filename; }
;
save_lineno:
{ if (yychar == YYEMPTY)
yychar = YYLEX;
$$ = lineno; }
;
lineno_labeled_stmt:
lineno_stmt
| lineno_label lineno_labeled_stmt
;
/* Like lineno_labeled_stmt, but a block in C99. */
c99_block_lineno_labeled_stmt:
c99_block_start lineno_labeled_stmt c99_block_end
{ if (flag_isoc99)
RECHAIN_STMTS ($1, COMPOUND_BODY ($1)); }
;
lineno_stmt:
save_filename save_lineno stmt
{ if ($3)
{
STMT_LINENO ($3) = $2;
/* ??? We currently have no way of recording
the filename for a statement. This probably
matters little in practice at the moment,
but I suspect that problems will occur when
doing inlining at the tree level. */
}
}
;
lineno_label:
save_filename save_lineno label
{ if ($3)
{
STMT_LINENO ($3) = $2;
}
}
;
select_or_iter_stmt:
simple_if ELSE
{ c_expand_start_else ();
$<itype>1 = stmt_count; }
c99_block_lineno_labeled_stmt
{ c_finish_else ();
c_expand_end_cond ();
if (extra_warnings && stmt_count == $<itype>1)
warning ("empty body in an else-statement"); }
| simple_if %prec IF
{ c_expand_end_cond ();
/* This warning is here instead of in simple_if, because we
do not want a warning if an empty if is followed by an
else statement. Increment stmt_count so we don't
give a second error if this is a nested `if'. */
if (extra_warnings && stmt_count++ == $<itype>1)
warning_with_file_and_line (if_stmt_file, if_stmt_line,
"empty body in an if-statement"); }
/* Make sure c_expand_end_cond is run once
for each call to c_expand_start_cond.
Otherwise a crash is likely. */
| simple_if ELSE error
{ c_expand_end_cond (); }
/* We must build the WHILE_STMT node before parsing its
condition so that STMT_LINENO refers to the line
containing the "while", and not the line containing
the close-parenthesis.
c_begin_while_stmt returns the WHILE_STMT node, which
we later pass to c_finish_while_stmt_cond to fill
in the condition and other tidbits. */
| WHILE
{ stmt_count++;
$<ttype>$ = c_begin_while_stmt (); }
'(' expr ')'
{ $4 = c_common_truthvalue_conversion ($4);
c_finish_while_stmt_cond
(c_common_truthvalue_conversion ($4), $<ttype>2);
$<ttype>$ = add_stmt ($<ttype>2); }
c99_block_lineno_labeled_stmt
{ RECHAIN_STMTS ($<ttype>6, WHILE_BODY ($<ttype>6)); }
| do_stmt_start
'(' expr ')' ';'
{ DO_COND ($1) = c_common_truthvalue_conversion ($3); }
| do_stmt_start error
{ }
| FOR
{ $<ttype>$ = build_stmt (FOR_STMT, NULL_TREE, NULL_TREE,
NULL_TREE, NULL_TREE);
add_stmt ($<ttype>$); }
'(' for_init_stmt
{ stmt_count++;
RECHAIN_STMTS ($<ttype>2, FOR_INIT_STMT ($<ttype>2)); }
xexpr ';'
{ if ($6)
FOR_COND ($<ttype>2)
= c_common_truthvalue_conversion ($6); }
xexpr ')'
{ FOR_EXPR ($<ttype>2) = $9; }
c99_block_lineno_labeled_stmt
{ RECHAIN_STMTS ($<ttype>2, FOR_BODY ($<ttype>2)); }
| SWITCH '(' expr ')'
{ stmt_count++;
$<ttype>$ = c_start_case ($3); }
c99_block_lineno_labeled_stmt
{ c_finish_case (); }
;
for_init_stmt:
xexpr ';'
{ add_stmt (build_stmt (EXPR_STMT, $1)); }
| decl
{ check_for_loop_decls (); }
;
/* Parse a single real statement, not including any labels. */
stmt:
compstmt
{ stmt_count++; $$ = $1; }
| expr ';'
{ stmt_count++;
$$ = c_expand_expr_stmt ($1); }
| c99_block_start select_or_iter_stmt c99_block_end
{ if (flag_isoc99)
RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
$$ = NULL_TREE; }
| BREAK ';'
{ stmt_count++;
$$ = add_stmt (build_break_stmt ()); }
| CONTINUE ';'
{ stmt_count++;
$$ = add_stmt (build_continue_stmt ()); }
| RETURN ';'
{ stmt_count++;
$$ = c_expand_return (NULL_TREE); }
| RETURN expr ';'
{ stmt_count++;
$$ = c_expand_return ($2); }
| ASM_KEYWORD maybe_type_qual '(' expr ')' ';'
{ stmt_count++;
$$ = simple_asm_stmt ($4); }
/* This is the case with just output operands. */
| ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ')' ';'
{ stmt_count++;
$$ = build_asm_stmt ($2, $4, $6, NULL_TREE, NULL_TREE); }
/* This is the case with input operands as well. */
| ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
asm_operands ')' ';'
{ stmt_count++;
$$ = build_asm_stmt ($2, $4, $6, $8, NULL_TREE); }
/* This is the case with clobbered registers as well. */
| ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
asm_operands ':' asm_clobbers ')' ';'
{ stmt_count++;
$$ = build_asm_stmt ($2, $4, $6, $8, $10); }
| GOTO identifier ';'
{ tree decl;
stmt_count++;
decl = lookup_label ($2);
if (decl != 0)
{
TREE_USED (decl) = 1;
$$ = add_stmt (build_stmt (GOTO_STMT, decl));
}
else
$$ = NULL_TREE;
}
| GOTO '*' expr ';'
{ if (pedantic)
pedwarn ("ISO C forbids `goto *expr;'");
stmt_count++;
$3 = convert (ptr_type_node, $3);
$$ = add_stmt (build_stmt (GOTO_STMT, $3)); }
| ';'
{ $$ = NULL_TREE; }
;
/* Any kind of label, including jump labels and case labels.
ANSI C accepts labels only before statements, but we allow them
also at the end of a compound statement. */
label: CASE expr_no_commas ':'
{ stmt_count++;
$$ = do_case ($2, NULL_TREE); }
| CASE expr_no_commas ELLIPSIS expr_no_commas ':'
{ stmt_count++;
$$ = do_case ($2, $4); }
| DEFAULT ':'
{ stmt_count++;
$$ = do_case (NULL_TREE, NULL_TREE); }
| identifier save_filename save_lineno ':' maybe_attribute
{ tree label = define_label ($2, $3, $1);
stmt_count++;
if (label)
{
decl_attributes (&label, $5, 0);
$$ = add_stmt (build_stmt (LABEL_STMT, label));
}
else
$$ = NULL_TREE;
}
;
/* Either a type-qualifier or nothing. First thing in an `asm' statement. */
maybe_type_qual:
/* empty */
{ emit_line_note (input_filename, lineno);
$$ = NULL_TREE; }
| TYPE_QUAL
{ emit_line_note (input_filename, lineno); }
;
xexpr:
/* empty */
{ $$ = NULL_TREE; }
| expr
;
/* These are the operands other than the first string and colon
in asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x)) */
asm_operands: /* empty */
{ $$ = NULL_TREE; }
| nonnull_asm_operands
;
nonnull_asm_operands:
asm_operand
| nonnull_asm_operands ',' asm_operand
{ $$ = chainon ($1, $3); }
;
asm_operand:
STRING '(' expr ')'
{ $$ = build_tree_list (build_tree_list (NULL_TREE, $1), $3); }
| '[' identifier ']' STRING '(' expr ')'
{ $2 = build_string (IDENTIFIER_LENGTH ($2),
IDENTIFIER_POINTER ($2));
$$ = build_tree_list (build_tree_list ($2, $4), $6); }
;
asm_clobbers:
STRING
{ $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
| asm_clobbers ',' STRING
{ $$ = tree_cons (NULL_TREE, $3, $1); }
;
/* This is what appears inside the parens in a function declarator.
Its value is a list of ..._TYPE nodes. Attributes must appear here
to avoid a conflict with their appearance after an open parenthesis
in an abstract declarator, as in
"void bar (int (__attribute__((__mode__(SI))) int foo));". */
parmlist:
maybe_attribute
{ pushlevel (0);
clear_parm_order ();
declare_parm_level (0); }
parmlist_1
{ $$ = $3;
parmlist_tags_warning ();
poplevel (0, 0, 0); }
;
parmlist_1:
parmlist_2 ')'
| parms ';'
{ tree parm;
if (pedantic)
pedwarn ("ISO C forbids forward parameter declarations");
/* Mark the forward decls as such. */
for (parm = getdecls (); parm; parm = TREE_CHAIN (parm))
TREE_ASM_WRITTEN (parm) = 1;
clear_parm_order (); }
maybe_attribute
{ /* Dummy action so attributes are in known place
on parser stack. */ }
parmlist_1
{ $$ = $6; }
| error ')'
{ $$ = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE); }
;
/* This is what appears inside the parens in a function declarator.
Is value is represented in the format that grokdeclarator expects. */
parmlist_2: /* empty */
{ $$ = get_parm_info (0); }
| ELLIPSIS
{ $$ = get_parm_info (0);
/* Gcc used to allow this as an extension. However, it does
not work for all targets, and thus has been disabled.
Also, since func (...) and func () are indistinguishable,
it caused problems with the code in expand_builtin which
tries to verify that BUILT_IN_NEXT_ARG is being used
correctly. */
error ("ISO C requires a named argument before `...'");
}
| parms
{ $$ = get_parm_info (1);
parsing_iso_function_signature = true;
}
| parms ',' ELLIPSIS
{ $$ = get_parm_info (0); }
;
parms:
firstparm
{ push_parm_decl ($1); }
| parms ',' parm
{ push_parm_decl ($3); }
;
/* A single parameter declaration or parameter type name,
as found in a parmlist. */
parm:
declspecs_ts setspecs parm_declarator maybe_attribute
{ $$ = build_tree_list (build_tree_list (current_declspecs,
$3),
chainon ($4, all_prefix_attributes));
POP_DECLSPEC_STACK; }
| declspecs_ts setspecs notype_declarator maybe_attribute
{ $$ = build_tree_list (build_tree_list (current_declspecs,
$3),
chainon ($4, all_prefix_attributes));
POP_DECLSPEC_STACK; }
| declspecs_ts setspecs absdcl_maybe_attribute
{ $$ = $3;
POP_DECLSPEC_STACK; }
| declspecs_nots setspecs notype_declarator maybe_attribute
{ $$ = build_tree_list (build_tree_list (current_declspecs,
$3),
chainon ($4, all_prefix_attributes));
POP_DECLSPEC_STACK; }
| declspecs_nots setspecs absdcl_maybe_attribute
{ $$ = $3;
POP_DECLSPEC_STACK; }
;
/* The first parm, which must suck attributes from off the top of the parser
stack. */
firstparm:
declspecs_ts_nosa setspecs_fp parm_declarator maybe_attribute
{ $$ = build_tree_list (build_tree_list (current_declspecs,
$3),
chainon ($4, all_prefix_attributes));
POP_DECLSPEC_STACK; }
| declspecs_ts_nosa setspecs_fp notype_declarator maybe_attribute
{ $$ = build_tree_list (build_tree_list (current_declspecs,
$3),
chainon ($4, all_prefix_attributes));
POP_DECLSPEC_STACK; }
| declspecs_ts_nosa setspecs_fp absdcl_maybe_attribute
{ $$ = $3;
POP_DECLSPEC_STACK; }
| declspecs_nots_nosa setspecs_fp notype_declarator maybe_attribute
{ $$ = build_tree_list (build_tree_list (current_declspecs,
$3),
chainon ($4, all_prefix_attributes));
POP_DECLSPEC_STACK; }
| declspecs_nots_nosa setspecs_fp absdcl_maybe_attribute
{ $$ = $3;
POP_DECLSPEC_STACK; }
;
setspecs_fp:
setspecs
{ prefix_attributes = chainon (prefix_attributes, $<ttype>-2);
all_prefix_attributes = prefix_attributes; }
;
/* This is used in a function definition
where either a parmlist or an identifier list is ok.
Its value is a list of ..._TYPE nodes or a list of identifiers. */
parmlist_or_identifiers:
maybe_attribute
{ pushlevel (0);
clear_parm_order ();
declare_parm_level (1); }
parmlist_or_identifiers_1
{ $$ = $3;
parmlist_tags_warning ();
poplevel (0, 0, 0); }
;
parmlist_or_identifiers_1:
parmlist_1
| identifiers ')'
{ tree t;
for (t = $1; t; t = TREE_CHAIN (t))
if (TREE_VALUE (t) == NULL_TREE)
error ("`...' in old-style identifier list");
$$ = tree_cons (NULL_TREE, NULL_TREE, $1);
/* Make sure we have a parmlist after attributes. */
if ($<ttype>-1 != 0
&& (TREE_CODE ($$) != TREE_LIST
|| TREE_PURPOSE ($$) == 0
|| TREE_CODE (TREE_PURPOSE ($$)) != PARM_DECL))
YYERROR1;
}
;
/* A nonempty list of identifiers. */
identifiers:
IDENTIFIER
{ $$ = build_tree_list (NULL_TREE, $1); }
| identifiers ',' IDENTIFIER
{ $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
;
/* A nonempty list of identifiers, including typenames. */
identifiers_or_typenames:
identifier
{ $$ = build_tree_list (NULL_TREE, $1); }
| identifiers_or_typenames ',' identifier
{ $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
;
extension:
EXTENSION
{ $$ = SAVE_EXT_FLAGS();
pedantic = 0;
warn_pointer_arith = 0;
warn_traditional = 0;
flag_iso = 0; }
;
ifobjc
/* Objective-C productions. */
objcdef:
classdef
| classdecl
| aliasdecl
| protocoldef
| methoddef
| END
{
if (objc_implementation_context)
{
finish_class (objc_implementation_context);
objc_ivar_chain = NULL_TREE;
objc_implementation_context = NULL_TREE;
}
else
warning ("`@end' must appear in an implementation context");
}
;
/* A nonempty list of identifiers. */
identifier_list:
identifier
{ $$ = build_tree_list (NULL_TREE, $1); }
| identifier_list ',' identifier
{ $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
;
classdecl:
CLASS identifier_list ';'
{
objc_declare_class ($2);
}
;
aliasdecl:
ALIAS identifier identifier ';'
{
objc_declare_alias ($2, $3);
}
;
classdef:
INTERFACE identifier protocolrefs '{'
{
objc_interface_context = objc_ivar_context
= start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
objc_public_flag = 0;
}
ivar_decl_list '}'
{
continue_class (objc_interface_context);
}
methodprotolist
END
{
finish_class (objc_interface_context);
objc_interface_context = NULL_TREE;
}
| INTERFACE identifier protocolrefs
{
objc_interface_context
= start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
continue_class (objc_interface_context);
}
methodprotolist
END
{
finish_class (objc_interface_context);
objc_interface_context = NULL_TREE;
}
| INTERFACE identifier ':' identifier protocolrefs '{'
{
objc_interface_context = objc_ivar_context
= start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
objc_public_flag = 0;
}
ivar_decl_list '}'
{
continue_class (objc_interface_context);
}
methodprotolist
END
{
finish_class (objc_interface_context);
objc_interface_context = NULL_TREE;
}
| INTERFACE identifier ':' identifier protocolrefs
{
objc_interface_context
= start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
continue_class (objc_interface_context);
}
methodprotolist
END
{
finish_class (objc_interface_context);
objc_interface_context = NULL_TREE;
}
| IMPLEMENTATION identifier '{'
{
objc_implementation_context = objc_ivar_context
= start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
objc_public_flag = 0;
}
ivar_decl_list '}'
{
objc_ivar_chain
= continue_class (objc_implementation_context);
}
| IMPLEMENTATION identifier
{
objc_implementation_context
= start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
objc_ivar_chain
= continue_class (objc_implementation_context);
}
| IMPLEMENTATION identifier ':' identifier '{'
{
objc_implementation_context = objc_ivar_context
= start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
objc_public_flag = 0;
}
ivar_decl_list '}'
{
objc_ivar_chain
= continue_class (objc_implementation_context);
}
| IMPLEMENTATION identifier ':' identifier
{
objc_implementation_context
= start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
objc_ivar_chain
= continue_class (objc_implementation_context);
}
| INTERFACE identifier '(' identifier ')' protocolrefs
{
objc_interface_context
= start_class (CATEGORY_INTERFACE_TYPE, $2, $4, $6);
continue_class (objc_interface_context);
}
methodprotolist
END
{
finish_class (objc_interface_context);
objc_interface_context = NULL_TREE;
}
| IMPLEMENTATION identifier '(' identifier ')'
{
objc_implementation_context
= start_class (CATEGORY_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
objc_ivar_chain
= continue_class (objc_implementation_context);
}
;
protocoldef:
PROTOCOL identifier protocolrefs
{
objc_pq_context = 1;
objc_interface_context
= start_protocol(PROTOCOL_INTERFACE_TYPE, $2, $3);
}
methodprotolist END
{
objc_pq_context = 0;
finish_protocol(objc_interface_context);
objc_interface_context = NULL_TREE;
}
/* The @protocol forward-declaration production introduces a
reduce/reduce conflict on ';', which should be resolved in
favor of the production 'identifier_list -> identifier'. */
| PROTOCOL identifier_list ';'
{
objc_declare_protocols ($2);
}
;
protocolrefs:
/* empty */
{
$$ = NULL_TREE;
}
| non_empty_protocolrefs
;
non_empty_protocolrefs:
ARITHCOMPARE identifier_list ARITHCOMPARE
{
if ($1 == LT_EXPR && $3 == GT_EXPR)
$$ = $2;
else
YYERROR1;
}
;
ivar_decl_list:
ivar_decl_list visibility_spec ivar_decls
| ivar_decls
;
visibility_spec:
PRIVATE { objc_public_flag = 2; }
| PROTECTED { objc_public_flag = 0; }
| PUBLIC { objc_public_flag = 1; }
;
ivar_decls:
/* empty */
{
$$ = NULL_TREE;
}
| ivar_decls ivar_decl ';'
| ivar_decls ';'
{
if (pedantic)
pedwarn ("extra semicolon in struct or union specified");
}
;
/* There is a shift-reduce conflict here, because `components' may
start with a `typename'. It happens that shifting (the default resolution)
does the right thing, because it treats the `typename' as part of
a `typed_typespecs'.
It is possible that this same technique would allow the distinction
between `notype_initdecls' and `initdecls' to be eliminated.
But I am being cautious and not trying it. */
ivar_decl:
declspecs_nosc_ts setspecs ivars
{ $$ = $3;
POP_DECLSPEC_STACK; }
| declspecs_nosc_nots setspecs ivars
{ $$ = $3;
POP_DECLSPEC_STACK; }
| error
{ $$ = NULL_TREE; }
;
ivars:
/* empty */
{ $$ = NULL_TREE; }
| ivar_declarator
| ivars ',' maybe_resetattrs ivar_declarator
;
ivar_declarator:
declarator
{
$$ = add_instance_variable (objc_ivar_context,
objc_public_flag,
$1, current_declspecs,
NULL_TREE);
}
| declarator ':' expr_no_commas
{
$$ = add_instance_variable (objc_ivar_context,
objc_public_flag,
$1, current_declspecs, $3);
}
| ':' expr_no_commas
{
$$ = add_instance_variable (objc_ivar_context,
objc_public_flag,
NULL_TREE,
current_declspecs, $2);
}
;
methodtype:
'+'
{ objc_inherit_code = CLASS_METHOD_DECL; }
| '-'
{ objc_inherit_code = INSTANCE_METHOD_DECL; }
;
methoddef:
methodtype
{
objc_pq_context = 1;
if (!objc_implementation_context)
fatal_error ("method definition not in class context");
}
methoddecl
{
objc_pq_context = 0;
if (objc_inherit_code == CLASS_METHOD_DECL)
add_class_method (objc_implementation_context, $3);
else
add_instance_method (objc_implementation_context, $3);
start_method_def ($3);
}
optarglist
{
continue_method_def ();
}
compstmt_or_error
{
finish_method_def ();
}
;
/* the reason for the strange actions in this rule
is so that notype_initdecls when reached via datadef
can find a valid list of type and sc specs in $0. */
methodprotolist:
/* empty */
| {$<ttype>$ = NULL_TREE; } methodprotolist2
;
methodprotolist2: /* eliminates a shift/reduce conflict */
methodproto
| datadef
| methodprotolist2 methodproto
| methodprotolist2 {$<ttype>$ = NULL_TREE; } datadef
;
semi_or_error:
';'
| error
;
methodproto:
methodtype
{
/* Remember protocol qualifiers in prototypes. */
objc_pq_context = 1;
}
methoddecl
{
/* Forget protocol qualifiers here. */
objc_pq_context = 0;
if (objc_inherit_code == CLASS_METHOD_DECL)
add_class_method (objc_interface_context, $3);
else
add_instance_method (objc_interface_context, $3);
}
semi_or_error
;
methoddecl:
'(' typename ')' unaryselector
{
$$ = build_method_decl (objc_inherit_code, $2, $4, NULL_TREE);
}
| unaryselector
{
$$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, NULL_TREE);
}
| '(' typename ')' keywordselector optparmlist
{
$$ = build_method_decl (objc_inherit_code, $2, $4, $5);
}
| keywordselector optparmlist
{
$$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, $2);
}
;
/* "optarglist" assumes that start_method_def has already been called...
if it is not, the "xdecls" will not be placed in the proper scope */
optarglist:
/* empty */
| ';' myxdecls
;
/* to get around the following situation: "int foo (int a) int b; {}" that
is synthesized when parsing "- a:a b:b; id c; id d; { ... }" */
myxdecls:
/* empty */
| mydecls
;
mydecls:
mydecl
| errstmt
| mydecls mydecl
| mydecl errstmt
;
mydecl:
declspecs_ts setspecs myparms ';'
{ POP_DECLSPEC_STACK; }
| declspecs_ts ';'
{ shadow_tag ($1); }
| declspecs_nots ';'
{ pedwarn ("empty declaration"); }
;
myparms:
myparm
{ push_parm_decl ($1); }
| myparms ',' myparm
{ push_parm_decl ($3); }
;
/* A single parameter declaration or parameter type name,
as found in a parmlist. DOES NOT ALLOW AN INITIALIZER OR ASMSPEC */
myparm:
parm_declarator maybe_attribute
{ $$ = build_tree_list (build_tree_list (current_declspecs,
$1),
chainon ($2, all_prefix_attributes)); }
| notype_declarator maybe_attribute
{ $$ = build_tree_list (build_tree_list (current_declspecs,
$1),
chainon ($2, all_prefix_attributes)); }
| absdcl_maybe_attribute
{ $$ = $1; }
;
optparmlist:
/* empty */
{
$$ = NULL_TREE;
}
| ',' ELLIPSIS
{
/* oh what a kludge! */
$$ = objc_ellipsis_node;
}
| ','
{
pushlevel (0);
}
parmlist_2
{
/* returns a tree list node generated by get_parm_info */
$$ = $3;
poplevel (0, 0, 0);
}
;
unaryselector:
selector
;
keywordselector:
keyworddecl
| keywordselector keyworddecl
{
$$ = chainon ($1, $2);
}
;
selector:
IDENTIFIER
| TYPENAME
| CLASSNAME
| OBJECTNAME
| reservedwords
;
reservedwords:
ENUM | STRUCT | UNION | IF | ELSE | WHILE | DO | FOR
| SWITCH | CASE | DEFAULT | BREAK | CONTINUE | RETURN
| GOTO | ASM_KEYWORD | SIZEOF | TYPEOF | ALIGNOF
| TYPESPEC | TYPE_QUAL
;
keyworddecl:
selector ':' '(' typename ')' identifier
{
$$ = build_keyword_decl ($1, $4, $6);
}
| selector ':' identifier
{
$$ = build_keyword_decl ($1, NULL_TREE, $3);
}
| ':' '(' typename ')' identifier
{
$$ = build_keyword_decl (NULL_TREE, $3, $5);
}
| ':' identifier
{
$$ = build_keyword_decl (NULL_TREE, NULL_TREE, $2);
}
;
messageargs:
selector
| keywordarglist
;
keywordarglist:
keywordarg
| keywordarglist keywordarg
{
$$ = chainon ($1, $2);
}
;
keywordexpr:
nonnull_exprlist
{
if (TREE_CHAIN ($1) == NULL_TREE)
/* just return the expr., remove a level of indirection */
$$ = TREE_VALUE ($1);
else
/* we have a comma expr., we will collapse later */
$$ = $1;
}
;
keywordarg:
selector ':' keywordexpr
{
$$ = build_tree_list ($1, $3);
}
| ':' keywordexpr
{
$$ = build_tree_list (NULL_TREE, $2);
}
;
receiver:
expr
| CLASSNAME
{
$$ = get_class_reference ($1);
}
;
objcmessageexpr:
'[' receiver messageargs ']'
{ $$ = build_tree_list ($2, $3); }
;
selectorarg:
selector
| keywordnamelist
;
keywordnamelist:
keywordname
| keywordnamelist keywordname
{
$$ = chainon ($1, $2);
}
;
keywordname:
selector ':'
{
$$ = build_tree_list ($1, NULL_TREE);
}
| ':'
{
$$ = build_tree_list (NULL_TREE, NULL_TREE);
}
;
objcselectorexpr:
SELECTOR '(' selectorarg ')'
{
$$ = $3;
}
;
objcprotocolexpr:
PROTOCOL '(' identifier ')'
{
$$ = $3;
}