1 /* Some code common to C++ and ObjC++ front ends.
2 Copyright (C) 2004, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
3 Contributed by Ziemowit Laski <zlaski@apple.com>
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
27 #include "c-family/c-common.h"
28 #include "langhooks.h"
29 #include "langhooks-def.h"
30 #include "diagnostic.h"
32 #include "cxx-pretty-print.h"
33 #include "cp-objcp-common.h"
35 /* Special routine to get the alias set for C++. */
38 cxx_get_alias_set (tree t)
40 if (IS_FAKE_BASE_TYPE (t))
41 /* The base variant of a type must be in the same alias set as the
43 return get_alias_set (TYPE_CONTEXT (t));
45 /* Punt on PMFs until we canonicalize functions properly. */
46 if (TYPE_PTRMEMFUNC_P (t)
47 || (POINTER_TYPE_P (t)
48 && TYPE_PTRMEMFUNC_P (TREE_TYPE (t))))
51 return c_common_get_alias_set (t);
54 /* Called from check_global_declarations. */
57 cxx_warn_unused_global_decl (const_tree decl)
59 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl))
61 if (DECL_IN_SYSTEM_HEADER (decl))
64 /* Const variables take the place of #defines in C++. */
65 if (TREE_CODE (decl) == VAR_DECL && TREE_READONLY (decl))
71 /* Langhook for tree_size: determine size of our 'x' and 'c' nodes. */
73 cp_tree_size (enum tree_code code)
77 case PTRMEM_CST: return sizeof (struct ptrmem_cst);
78 case BASELINK: return sizeof (struct tree_baselink);
79 case TEMPLATE_PARM_INDEX: return sizeof (template_parm_index);
80 case DEFAULT_ARG: return sizeof (struct tree_default_arg);
81 case OVERLOAD: return sizeof (struct tree_overload);
82 case STATIC_ASSERT: return sizeof (struct tree_static_assert);
83 case TYPE_ARGUMENT_PACK:
84 case TYPE_PACK_EXPANSION:
85 return sizeof (struct tree_common);
87 case NONTYPE_ARGUMENT_PACK:
88 case EXPR_PACK_EXPANSION:
89 return sizeof (struct tree_exp);
91 case ARGUMENT_PACK_SELECT:
92 return sizeof (struct tree_argument_pack_select);
95 return sizeof (struct tree_trait_expr);
97 case LAMBDA_EXPR: return sizeof (struct tree_lambda_expr);
99 case TEMPLATE_INFO: return sizeof (struct tree_template_info);
107 /* Returns true if T is a variably modified type, in the sense of C99.
108 FN is as passed to variably_modified_p.
109 This routine needs only check cases that cannot be handled by the
110 language-independent logic in tree.c. */
113 cp_var_mod_type_p (tree type, tree fn)
115 /* If TYPE is a pointer-to-member, it is variably modified if either
116 the class or the member are variably modified. */
117 if (TYPE_PTR_TO_MEMBER_P (type))
118 return (variably_modified_type_p (TYPE_PTRMEM_CLASS_TYPE (type), fn)
119 || variably_modified_type_p (TYPE_PTRMEM_POINTED_TO_TYPE (type),
122 /* All other types are not variably modified. */
126 /* Construct a C++-aware pretty-printer for CONTEXT. It is assumed
127 that CONTEXT->printer is an already constructed basic pretty_printer. */
129 cxx_initialize_diagnostics (diagnostic_context *context)
131 pretty_printer *base;
132 cxx_pretty_printer *pp;
134 c_common_initialize_diagnostics (context);
136 base = context->printer;
137 pp = XNEW (cxx_pretty_printer);
138 memcpy (pp_base (pp), base, sizeof (pretty_printer));
139 pp_cxx_pretty_printer_init (pp);
140 context->printer = (pretty_printer *) pp;
142 /* It is safe to free this object because it was previously malloc()'d. */
146 /* This compares two types for equivalence ("compatible" in C-based languages).
147 This routine should only return 1 if it is sure. It should not be used
148 in contexts where erroneously returning 0 causes problems. */
151 cxx_types_compatible_p (tree x, tree y)
153 return same_type_ignoring_top_level_qualifiers_p (x, y);
156 /* Return true if DECL is explicit member function. */
159 cp_function_decl_explicit_p (tree decl)
162 && FUNCTION_FIRST_USER_PARMTYPE (decl) != void_list_node
163 && DECL_NONCONVERTING_P (decl));
166 /* Stubs to keep c-opts.c happy. */
168 push_file_scope (void)
173 pop_file_scope (void)
177 /* c-pragma.c needs to query whether a decl has extern "C" linkage. */
179 has_c_linkage (const_tree decl)
181 return DECL_EXTERN_C_P (decl);
184 static GTY ((if_marked ("tree_decl_map_marked_p"), param_is (struct tree_decl_map)))
185 htab_t shadowed_var_for_decl;
187 /* Lookup a shadowed var for FROM, and return it if we find one. */
190 decl_shadowed_for_var_lookup (tree from)
192 struct tree_decl_map *h, in;
195 h = (struct tree_decl_map *)
196 htab_find_with_hash (shadowed_var_for_decl, &in, DECL_UID (from));
202 /* Insert a mapping FROM->TO in the shadowed var hashtable. */
205 decl_shadowed_for_var_insert (tree from, tree to)
207 struct tree_decl_map *h;
210 h = ggc_alloc_tree_decl_map ();
213 loc = htab_find_slot_with_hash (shadowed_var_for_decl, h, DECL_UID (from),
215 *(struct tree_decl_map **) loc = h;
219 init_shadowed_var_for_decl (void)
221 shadowed_var_for_decl = htab_create_ggc (512, tree_decl_map_hash,
222 tree_decl_map_eq, 0);
226 #include "gt-cp-cp-objcp-common.h"