| /* Some code common to C++ and ObjC++ front ends. |
| Copyright (C) 2004-2013 Free Software Foundation, Inc. |
| Contributed by Ziemowit Laski <zlaski@apple.com> |
| |
| 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 3, 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 COPYING3. If not see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include "config.h" |
| #include "system.h" |
| #include "coretypes.h" |
| #include "tm.h" |
| #include "tree.h" |
| #include "cp-tree.h" |
| #include "c-family/c-common.h" |
| #include "langhooks.h" |
| #include "langhooks-def.h" |
| #include "diagnostic.h" |
| #include "debug.h" |
| #include "cxx-pretty-print.h" |
| #include "cp-objcp-common.h" |
| |
| /* Special routine to get the alias set for C++. */ |
| |
| alias_set_type |
| cxx_get_alias_set (tree t) |
| { |
| if (IS_FAKE_BASE_TYPE (t)) |
| /* The base variant of a type must be in the same alias set as the |
| complete type. */ |
| return get_alias_set (TYPE_CONTEXT (t)); |
| |
| /* Punt on PMFs until we canonicalize functions properly. */ |
| if (TYPE_PTRMEMFUNC_P (t) |
| || (POINTER_TYPE_P (t) |
| && TYPE_PTRMEMFUNC_P (TREE_TYPE (t)))) |
| return 0; |
| |
| return c_common_get_alias_set (t); |
| } |
| |
| /* Called from check_global_declarations. */ |
| |
| bool |
| cxx_warn_unused_global_decl (const_tree decl) |
| { |
| if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl)) |
| return false; |
| if (DECL_IN_SYSTEM_HEADER (decl)) |
| return false; |
| |
| /* Const variables take the place of #defines in C++. */ |
| if (TREE_CODE (decl) == VAR_DECL && TREE_READONLY (decl)) |
| return false; |
| |
| return true; |
| } |
| |
| /* Langhook for tree_size: determine size of our 'x' and 'c' nodes. */ |
| size_t |
| cp_tree_size (enum tree_code code) |
| { |
| switch (code) |
| { |
| case PTRMEM_CST: return sizeof (struct ptrmem_cst); |
| case BASELINK: return sizeof (struct tree_baselink); |
| case TEMPLATE_PARM_INDEX: return sizeof (template_parm_index); |
| case DEFAULT_ARG: return sizeof (struct tree_default_arg); |
| case DEFERRED_NOEXCEPT: return sizeof (struct tree_deferred_noexcept); |
| case OVERLOAD: return sizeof (struct tree_overload); |
| case STATIC_ASSERT: return sizeof (struct tree_static_assert); |
| case TYPE_ARGUMENT_PACK: |
| case TYPE_PACK_EXPANSION: |
| return sizeof (struct tree_common); |
| |
| case NONTYPE_ARGUMENT_PACK: |
| case EXPR_PACK_EXPANSION: |
| return sizeof (struct tree_exp); |
| |
| case ARGUMENT_PACK_SELECT: |
| return sizeof (struct tree_argument_pack_select); |
| |
| case TRAIT_EXPR: |
| return sizeof (struct tree_trait_expr); |
| |
| case LAMBDA_EXPR: return sizeof (struct tree_lambda_expr); |
| |
| case TEMPLATE_INFO: return sizeof (struct tree_template_info); |
| |
| case USERDEF_LITERAL: return sizeof (struct tree_userdef_literal); |
| |
| default: |
| gcc_unreachable (); |
| } |
| /* NOTREACHED */ |
| } |
| |
| /* Returns true if T is a variably modified type, in the sense of C99. |
| FN is as passed to variably_modified_p. |
| This routine needs only check cases that cannot be handled by the |
| language-independent logic in tree.c. */ |
| |
| bool |
| cp_var_mod_type_p (tree type, tree fn) |
| { |
| /* If TYPE is a pointer-to-member, it is variably modified if either |
| the class or the member are variably modified. */ |
| if (TYPE_PTRMEM_P (type)) |
| return (variably_modified_type_p (TYPE_PTRMEM_CLASS_TYPE (type), fn) |
| || variably_modified_type_p (TYPE_PTRMEM_POINTED_TO_TYPE (type), |
| fn)); |
| |
| /* All other types are not variably modified. */ |
| return false; |
| } |
| |
| /* Construct a C++-aware pretty-printer for CONTEXT. It is assumed |
| that CONTEXT->printer is an already constructed basic pretty_printer. */ |
| void |
| cxx_initialize_diagnostics (diagnostic_context *context) |
| { |
| pretty_printer *base; |
| cxx_pretty_printer *pp; |
| |
| c_common_initialize_diagnostics (context); |
| |
| base = context->printer; |
| pp = XNEW (cxx_pretty_printer); |
| memcpy (pp_base (pp), base, sizeof (pretty_printer)); |
| pp_cxx_pretty_printer_init (pp); |
| context->printer = (pretty_printer *) pp; |
| |
| /* It is safe to free this object because it was previously malloc()'d. */ |
| free (base); |
| } |
| |
| /* This compares two types for equivalence ("compatible" in C-based languages). |
| This routine should only return 1 if it is sure. It should not be used |
| in contexts where erroneously returning 0 causes problems. */ |
| |
| int |
| cxx_types_compatible_p (tree x, tree y) |
| { |
| return same_type_ignoring_top_level_qualifiers_p (x, y); |
| } |
| |
| /* Return true if DECL is explicit member function. */ |
| |
| bool |
| cp_function_decl_explicit_p (tree decl) |
| { |
| return (decl |
| && FUNCTION_FIRST_USER_PARMTYPE (decl) != void_list_node |
| && DECL_LANG_SPECIFIC (STRIP_TEMPLATE (decl)) |
| && DECL_NONCONVERTING_P (decl)); |
| } |
| |
| /* Stubs to keep c-opts.c happy. */ |
| void |
| push_file_scope (void) |
| { |
| } |
| |
| void |
| pop_file_scope (void) |
| { |
| } |
| |
| /* c-pragma.c needs to query whether a decl has extern "C" linkage. */ |
| bool |
| has_c_linkage (const_tree decl) |
| { |
| return DECL_EXTERN_C_P (decl); |
| } |
| |
| static GTY ((if_marked ("tree_decl_map_marked_p"), param_is (struct tree_decl_map))) |
| htab_t shadowed_var_for_decl; |
| |
| /* Lookup a shadowed var for FROM, and return it if we find one. */ |
| |
| tree |
| decl_shadowed_for_var_lookup (tree from) |
| { |
| struct tree_decl_map *h, in; |
| in.base.from = from; |
| |
| h = (struct tree_decl_map *) |
| htab_find_with_hash (shadowed_var_for_decl, &in, DECL_UID (from)); |
| if (h) |
| return h->to; |
| return NULL_TREE; |
| } |
| |
| /* Insert a mapping FROM->TO in the shadowed var hashtable. */ |
| |
| void |
| decl_shadowed_for_var_insert (tree from, tree to) |
| { |
| struct tree_decl_map *h; |
| void **loc; |
| |
| h = ggc_alloc_tree_decl_map (); |
| h->base.from = from; |
| h->to = to; |
| loc = htab_find_slot_with_hash (shadowed_var_for_decl, h, DECL_UID (from), |
| INSERT); |
| *(struct tree_decl_map **) loc = h; |
| } |
| |
| void |
| init_shadowed_var_for_decl (void) |
| { |
| shadowed_var_for_decl = htab_create_ggc (512, tree_decl_map_hash, |
| tree_decl_map_eq, 0); |
| } |
| |
| /* Return true if stmt can fall thru. Used by block_may_fallthru |
| default case. */ |
| |
| bool |
| cxx_block_may_fallthru (const_tree stmt) |
| { |
| switch (TREE_CODE (stmt)) |
| { |
| case EXPR_STMT: |
| return block_may_fallthru (EXPR_STMT_EXPR (stmt)); |
| |
| case THROW_EXPR: |
| return false; |
| |
| default: |
| return true; |
| } |
| } |
| |
| void |
| cp_common_init_ts (void) |
| { |
| MARK_TS_DECL_NON_COMMON (NAMESPACE_DECL); |
| MARK_TS_DECL_NON_COMMON (USING_DECL); |
| MARK_TS_DECL_NON_COMMON (TEMPLATE_DECL); |
| |
| MARK_TS_COMMON (TEMPLATE_TEMPLATE_PARM); |
| MARK_TS_COMMON (TEMPLATE_TYPE_PARM); |
| MARK_TS_COMMON (TEMPLATE_PARM_INDEX); |
| MARK_TS_COMMON (OVERLOAD); |
| MARK_TS_COMMON (TEMPLATE_INFO); |
| MARK_TS_COMMON (TYPENAME_TYPE); |
| MARK_TS_COMMON (TYPEOF_TYPE); |
| MARK_TS_COMMON (UNDERLYING_TYPE); |
| MARK_TS_COMMON (BASELINK); |
| MARK_TS_COMMON (TYPE_PACK_EXPANSION); |
| MARK_TS_COMMON (TYPE_ARGUMENT_PACK); |
| MARK_TS_COMMON (DECLTYPE_TYPE); |
| MARK_TS_COMMON (BOUND_TEMPLATE_TEMPLATE_PARM); |
| MARK_TS_COMMON (UNBOUND_CLASS_TEMPLATE); |
| |
| MARK_TS_TYPED (EXPR_PACK_EXPANSION); |
| MARK_TS_TYPED (SWITCH_STMT); |
| MARK_TS_TYPED (IF_STMT); |
| MARK_TS_TYPED (FOR_STMT); |
| MARK_TS_TYPED (RANGE_FOR_STMT); |
| MARK_TS_TYPED (AGGR_INIT_EXPR); |
| MARK_TS_TYPED (EXPR_STMT); |
| MARK_TS_TYPED (EH_SPEC_BLOCK); |
| MARK_TS_TYPED (CLEANUP_STMT); |
| MARK_TS_TYPED (SCOPE_REF); |
| MARK_TS_TYPED (CAST_EXPR); |
| MARK_TS_TYPED (NON_DEPENDENT_EXPR); |
| MARK_TS_TYPED (MODOP_EXPR); |
| MARK_TS_TYPED (TRY_BLOCK); |
| MARK_TS_TYPED (THROW_EXPR); |
| MARK_TS_TYPED (HANDLER); |
| MARK_TS_TYPED (REINTERPRET_CAST_EXPR); |
| MARK_TS_TYPED (CONST_CAST_EXPR); |
| MARK_TS_TYPED (STATIC_CAST_EXPR); |
| MARK_TS_TYPED (DYNAMIC_CAST_EXPR); |
| MARK_TS_TYPED (IMPLICIT_CONV_EXPR); |
| MARK_TS_TYPED (TEMPLATE_ID_EXPR); |
| MARK_TS_TYPED (ARROW_EXPR); |
| MARK_TS_TYPED (SIZEOF_EXPR); |
| MARK_TS_TYPED (ALIGNOF_EXPR); |
| MARK_TS_TYPED (AT_ENCODE_EXPR); |
| MARK_TS_TYPED (UNARY_PLUS_EXPR); |
| MARK_TS_TYPED (TRAIT_EXPR); |
| MARK_TS_TYPED (TYPE_ARGUMENT_PACK); |
| MARK_TS_TYPED (NOEXCEPT_EXPR); |
| MARK_TS_TYPED (NONTYPE_ARGUMENT_PACK); |
| MARK_TS_TYPED (WHILE_STMT); |
| MARK_TS_TYPED (NEW_EXPR); |
| MARK_TS_TYPED (VEC_NEW_EXPR); |
| MARK_TS_TYPED (BREAK_STMT); |
| MARK_TS_TYPED (MEMBER_REF); |
| MARK_TS_TYPED (DOTSTAR_EXPR); |
| MARK_TS_TYPED (DO_STMT); |
| MARK_TS_TYPED (DELETE_EXPR); |
| MARK_TS_TYPED (VEC_DELETE_EXPR); |
| MARK_TS_TYPED (CONTINUE_STMT); |
| MARK_TS_TYPED (TAG_DEFN); |
| MARK_TS_TYPED (PSEUDO_DTOR_EXPR); |
| MARK_TS_TYPED (TYPEID_EXPR); |
| MARK_TS_TYPED (MUST_NOT_THROW_EXPR); |
| MARK_TS_TYPED (STMT_EXPR); |
| MARK_TS_TYPED (OFFSET_REF); |
| MARK_TS_TYPED (OFFSETOF_EXPR); |
| MARK_TS_TYPED (PTRMEM_CST); |
| MARK_TS_TYPED (EMPTY_CLASS_EXPR); |
| MARK_TS_TYPED (VEC_INIT_EXPR); |
| MARK_TS_TYPED (USING_STMT); |
| MARK_TS_TYPED (LAMBDA_EXPR); |
| MARK_TS_TYPED (CTOR_INITIALIZER); |
| } |
| |
| #include "gt-cp-cp-objcp-common.h" |