1 /* Language-dependent hooks for C++.
2 Copyright 2001, 2002, 2004, 2007, 2008, 2009, 2010
3 Free Software Foundation, Inc.
4 Contributed by Alexandre Oliva <aoliva@redhat.com>
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
24 #include "coretypes.h"
28 #include "c-family/c-common.h"
29 #include "langhooks.h"
30 #include "langhooks-def.h"
32 #include "cp-objcp-common.h"
36 enum c_language_kind c_language = clk_cxx;
37 static void cp_init_ts (void);
38 static const char * cxx_dwarf_name (tree t, int verbosity);
39 static enum classify_record cp_classify_record (tree type);
40 static tree cp_eh_personality (void);
41 static tree get_template_innermost_arguments_folded (const_tree);
42 static tree get_template_argument_pack_elems_folded (const_tree);
44 /* Lang hooks common to C++ and ObjC++ are declared in cp/cp-objcp-common.h;
45 consequently, there should be very few hooks below. */
47 #undef LANG_HOOKS_NAME
48 #define LANG_HOOKS_NAME "GNU C++"
49 #undef LANG_HOOKS_INIT
50 #define LANG_HOOKS_INIT cxx_init
51 #undef LANG_HOOKS_CLASSIFY_RECORD
52 #define LANG_HOOKS_CLASSIFY_RECORD cp_classify_record
53 #undef LANG_HOOKS_GENERIC_TYPE_P
54 #define LANG_HOOKS_GENERIC_TYPE_P class_tmpl_impl_spec_p
56 #undef LANG_HOOKS_GET_INNERMOST_GENERIC_PARMS
57 #define LANG_HOOKS_GET_INNERMOST_GENERIC_PARMS \
58 get_primary_template_innermost_parameters
59 #undef LANG_HOOKS_GET_INNERMOST_GENERIC_ARGS
60 #define LANG_HOOKS_GET_INNERMOST_GENERIC_ARGS \
61 get_template_innermost_arguments_folded
62 #undef LANG_HOOKS_FUNCTION_PARAMETER_PACK_P
63 #define LANG_HOOKS_FUNCTION_PARAMETER_PACK_P \
64 function_parameter_pack_p
65 #undef LANG_HOOKS_GET_ARGUMENT_PACK_ELEMS
66 #define LANG_HOOKS_GET_ARGUMENT_PACK_ELEMS \
67 get_template_argument_pack_elems_folded
68 #undef LANG_HOOKS_GENERIC_GENERIC_PARAMETER_DECL_P
69 #define LANG_HOOKS_GENERIC_GENERIC_PARAMETER_DECL_P \
70 template_template_parameter_p
71 #undef LANG_HOOKS_FUNCTION_PARM_EXPANDED_FROM_PACK_P
72 #define LANG_HOOKS_FUNCTION_PARM_EXPANDED_FROM_PACK_P \
73 function_parameter_expanded_from_pack_p
74 #undef LANG_HOOKS_GET_GENERIC_FUNCTION_DECL
75 #define LANG_HOOKS_GET_GENERIC_FUNCTION_DECL get_function_template_decl
76 #undef LANG_HOOKS_DWARF_NAME
77 #define LANG_HOOKS_DWARF_NAME cxx_dwarf_name
78 #undef LANG_HOOKS_INIT_TS
79 #define LANG_HOOKS_INIT_TS cp_init_ts
80 #undef LANG_HOOKS_EH_PERSONALITY
81 #define LANG_HOOKS_EH_PERSONALITY cp_eh_personality
82 #undef LANG_HOOKS_EH_RUNTIME_TYPE
83 #define LANG_HOOKS_EH_RUNTIME_TYPE build_eh_type_type
85 /* Each front end provides its own lang hook initializer. */
86 struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;
88 /* Lang hook routines common to C++ and ObjC++ appear in cp/cp-objcp-common.c;
89 there should be very few routines below. */
91 /* The following function does something real, but only in Objective-C++. */
94 objcp_tsubst_copy_and_build (tree t ATTRIBUTE_UNUSED,
95 tree args ATTRIBUTE_UNUSED,
96 tsubst_flags_t complain ATTRIBUTE_UNUSED,
97 tree in_decl ATTRIBUTE_UNUSED,
98 bool function_p ATTRIBUTE_UNUSED)
107 tree_contains_struct[NAMESPACE_DECL][TS_DECL_NON_COMMON] = 1;
108 tree_contains_struct[USING_DECL][TS_DECL_NON_COMMON] = 1;
109 tree_contains_struct[TEMPLATE_DECL][TS_DECL_NON_COMMON] = 1;
111 tree_contains_struct[NAMESPACE_DECL][TS_DECL_WITH_VIS] = 1;
112 tree_contains_struct[USING_DECL][TS_DECL_WITH_VIS] = 1;
113 tree_contains_struct[TEMPLATE_DECL][TS_DECL_WITH_VIS] = 1;
115 tree_contains_struct[NAMESPACE_DECL][TS_DECL_WRTL] = 1;
116 tree_contains_struct[USING_DECL][TS_DECL_WRTL] = 1;
117 tree_contains_struct[TEMPLATE_DECL][TS_DECL_WRTL] = 1;
119 tree_contains_struct[NAMESPACE_DECL][TS_DECL_COMMON] = 1;
120 tree_contains_struct[USING_DECL][TS_DECL_COMMON] = 1;
121 tree_contains_struct[TEMPLATE_DECL][TS_DECL_COMMON] = 1;
123 tree_contains_struct[NAMESPACE_DECL][TS_DECL_MINIMAL] = 1;
124 tree_contains_struct[USING_DECL][TS_DECL_MINIMAL] = 1;
125 tree_contains_struct[TEMPLATE_DECL][TS_DECL_MINIMAL] = 1;
127 init_shadowed_var_for_decl ();
132 cxx_dwarf_name (tree t, int verbosity)
134 gcc_assert (DECL_P (t));
137 && (ANON_AGGRNAME_P (DECL_NAME (t)) || LAMBDANAME_P (DECL_NAME (t))))
140 return decl_as_string (t,
141 TFF_DECL_SPECIFIERS | TFF_UNQUALIFIED_NAME
142 | TFF_NO_OMIT_DEFAULT_TEMPLATE_ARGUMENTS);
144 return cxx_printable_name (t, verbosity);
147 static enum classify_record
148 cp_classify_record (tree type)
150 if (CLASSTYPE_DECLARED_CLASS (type))
151 return RECORD_IS_CLASS;
153 return RECORD_IS_STRUCT;
156 static GTY(()) tree cp_eh_personality_decl;
159 cp_eh_personality (void)
161 if (!cp_eh_personality_decl)
163 const char *lang = (pragma_java_exceptions ? "gcj" : "gxx");
164 cp_eh_personality_decl = build_personality_function (lang);
167 return cp_eh_personality_decl;
170 /* This is a subroutine of fold_cplus_constants. It returns TRUE if T
171 is a C++ specific constant that needs to be folded further before
172 being passed to the debug info emitter. */
175 template_arg_needs_folding (const_tree t)
177 /* For now only PTRMEM_CST nodes are to be folded further. */
178 if (TREE_CODE (t) == PTRMEM_CST)
183 /* Fold the elements of the TREE_VEC C which are C++ specific nodes
184 that would need folding so that they can be processed by the debug
185 info emitter. This is a subroutine of
186 get_template_innermost_arguments_folded and
187 get_template_argument_pack_elems_folded. */
190 fold_cplus_constants (const_tree c)
192 tree folded_elems, elems = CONST_CAST_TREE (c);
195 if (elems == NULL_TREE || elems == error_mark_node)
198 vec_len = TREE_VEC_LENGTH (elems);
200 /* First check if there is at least one element that needs
201 folding. If there is none, we just return ELEMS. Otherwise create
202 and return a new tree vector that contains the folded versions of
203 ELEMS. This is to avoid allocating memory if we don't need
205 for (i = 0; i < vec_len; ++i)
207 if (template_arg_needs_folding (TREE_VEC_ELT (elems, i)))
213 folded_elems = make_tree_vec (vec_len);
214 for (i = 0; i < vec_len; ++i)
216 tree elem = TREE_VEC_ELT (elems, i);
217 TREE_VEC_ELT (folded_elems, i) =
218 (elem && !TYPE_P (elem)) ? cplus_expand_constant (elem) : elem;
224 /* The C++ implementation of the LANG_HOOKS_GET_INNERMOST_GENERIC_ARGS
225 hook. It returns the innermost template arguments of type T, and
226 makes sure those arguments are folded enough for the debug info
230 get_template_innermost_arguments_folded (const_tree t)
232 return fold_cplus_constants (get_template_innermost_arguments (t));
236 get_template_argument_pack_elems_folded (const_tree t)
238 return fold_cplus_constants (get_template_argument_pack_elems (t));
241 #include "gt-cp-cp-lang.h"
242 #include "gtype-cp.h"