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"
37 enum c_language_kind c_language
= clk_cxx
;
38 static void cp_init_ts (void);
39 static const char * cxx_dwarf_name (tree t
, int verbosity
);
40 static enum classify_record
cp_classify_record (tree type
);
41 static tree
cp_eh_personality (void);
42 static tree
get_template_innermost_arguments_folded (const_tree
);
43 static tree
get_template_argument_pack_elems_folded (const_tree
);
45 /* Lang hooks common to C++ and ObjC++ are declared in cp/cp-objcp-common.h;
46 consequently, there should be very few hooks below. */
48 #undef LANG_HOOKS_NAME
49 #define LANG_HOOKS_NAME "GNU C++"
50 #undef LANG_HOOKS_INIT
51 #define LANG_HOOKS_INIT cxx_init
52 #undef LANG_HOOKS_CLASSIFY_RECORD
53 #define LANG_HOOKS_CLASSIFY_RECORD cp_classify_record
54 #undef LANG_HOOKS_GENERIC_TYPE_P
55 #define LANG_HOOKS_GENERIC_TYPE_P class_tmpl_impl_spec_p
57 #undef LANG_HOOKS_GET_INNERMOST_GENERIC_PARMS
58 #define LANG_HOOKS_GET_INNERMOST_GENERIC_PARMS \
59 get_primary_template_innermost_parameters
60 #undef LANG_HOOKS_GET_INNERMOST_GENERIC_ARGS
61 #define LANG_HOOKS_GET_INNERMOST_GENERIC_ARGS \
62 get_template_innermost_arguments_folded
63 #undef LANG_HOOKS_FUNCTION_PARAMETER_PACK_P
64 #define LANG_HOOKS_FUNCTION_PARAMETER_PACK_P \
65 function_parameter_pack_p
66 #undef LANG_HOOKS_GET_ARGUMENT_PACK_ELEMS
67 #define LANG_HOOKS_GET_ARGUMENT_PACK_ELEMS \
68 get_template_argument_pack_elems_folded
69 #undef LANG_HOOKS_GENERIC_GENERIC_PARAMETER_DECL_P
70 #define LANG_HOOKS_GENERIC_GENERIC_PARAMETER_DECL_P \
71 template_template_parameter_p
72 #undef LANG_HOOKS_FUNCTION_PARM_EXPANDED_FROM_PACK_P
73 #define LANG_HOOKS_FUNCTION_PARM_EXPANDED_FROM_PACK_P \
74 function_parameter_expanded_from_pack_p
75 #undef LANG_HOOKS_GET_GENERIC_FUNCTION_DECL
76 #define LANG_HOOKS_GET_GENERIC_FUNCTION_DECL get_function_template_decl
77 #undef LANG_HOOKS_DWARF_NAME
78 #define LANG_HOOKS_DWARF_NAME cxx_dwarf_name
79 #undef LANG_HOOKS_INIT_TS
80 #define LANG_HOOKS_INIT_TS cp_init_ts
81 #undef LANG_HOOKS_EH_PERSONALITY
82 #define LANG_HOOKS_EH_PERSONALITY cp_eh_personality
83 #undef LANG_HOOKS_EH_RUNTIME_TYPE
84 #define LANG_HOOKS_EH_RUNTIME_TYPE build_eh_type_type
86 /* Each front end provides its own lang hook initializer. */
87 struct lang_hooks lang_hooks
= LANG_HOOKS_INITIALIZER
;
89 /* Lang hook routines common to C++ and ObjC++ appear in cp/cp-objcp-common.c;
90 there should be very few routines below. */
92 /* The following function does something real, but only in Objective-C++. */
95 objcp_tsubst_copy_and_build (tree t ATTRIBUTE_UNUSED
,
96 tree args ATTRIBUTE_UNUSED
,
97 tsubst_flags_t complain ATTRIBUTE_UNUSED
,
98 tree in_decl ATTRIBUTE_UNUSED
,
99 bool function_p ATTRIBUTE_UNUSED
)
108 tree_contains_struct
[NAMESPACE_DECL
][TS_DECL_NON_COMMON
] = 1;
109 tree_contains_struct
[USING_DECL
][TS_DECL_NON_COMMON
] = 1;
110 tree_contains_struct
[TEMPLATE_DECL
][TS_DECL_NON_COMMON
] = 1;
112 tree_contains_struct
[NAMESPACE_DECL
][TS_DECL_WITH_VIS
] = 1;
113 tree_contains_struct
[USING_DECL
][TS_DECL_WITH_VIS
] = 1;
114 tree_contains_struct
[TEMPLATE_DECL
][TS_DECL_WITH_VIS
] = 1;
116 tree_contains_struct
[NAMESPACE_DECL
][TS_DECL_WRTL
] = 1;
117 tree_contains_struct
[USING_DECL
][TS_DECL_WRTL
] = 1;
118 tree_contains_struct
[TEMPLATE_DECL
][TS_DECL_WRTL
] = 1;
120 tree_contains_struct
[NAMESPACE_DECL
][TS_DECL_COMMON
] = 1;
121 tree_contains_struct
[USING_DECL
][TS_DECL_COMMON
] = 1;
122 tree_contains_struct
[TEMPLATE_DECL
][TS_DECL_COMMON
] = 1;
124 tree_contains_struct
[NAMESPACE_DECL
][TS_DECL_MINIMAL
] = 1;
125 tree_contains_struct
[USING_DECL
][TS_DECL_MINIMAL
] = 1;
126 tree_contains_struct
[TEMPLATE_DECL
][TS_DECL_MINIMAL
] = 1;
128 init_shadowed_var_for_decl ();
133 cxx_dwarf_name (tree t
, int verbosity
)
135 gcc_assert (DECL_P (t
));
138 && (ANON_AGGRNAME_P (DECL_NAME (t
)) || LAMBDANAME_P (DECL_NAME (t
))))
141 return decl_as_string (t
,
142 TFF_DECL_SPECIFIERS
| TFF_UNQUALIFIED_NAME
143 | TFF_NO_OMIT_DEFAULT_TEMPLATE_ARGUMENTS
);
145 return cxx_printable_name (t
, verbosity
);
148 static enum classify_record
149 cp_classify_record (tree type
)
151 if (CLASSTYPE_DECLARED_CLASS (type
))
152 return RECORD_IS_CLASS
;
154 return RECORD_IS_STRUCT
;
157 static GTY(()) tree cp_eh_personality_decl
;
160 cp_eh_personality (void)
162 if (!cp_eh_personality_decl
)
164 const char *lang
= (pragma_java_exceptions
? "gcj" : "gxx");
165 cp_eh_personality_decl
= build_personality_function (lang
);
168 return cp_eh_personality_decl
;
171 /* This is a subroutine of fold_cplus_constants. It returns TRUE if T
172 is a C++ specific constant that needs to be folded further before
173 being passed to the debug info emitter. */
176 template_arg_needs_folding (const_tree t
)
178 /* For now only PTRMEM_CST nodes are to be folded further. */
179 if (TREE_CODE (t
) == PTRMEM_CST
)
184 /* Fold the elements of the TREE_VEC C which are C++ specific nodes
185 that would need folding so that they can be processed by the debug
186 info emitter. This is a subroutine of
187 get_template_innermost_arguments_folded and
188 get_template_argument_pack_elems_folded. */
191 fold_cplus_constants (const_tree c
)
193 tree folded_elems
, elems
= CONST_CAST_TREE (c
);
196 if (elems
== NULL_TREE
|| elems
== error_mark_node
)
199 vec_len
= TREE_VEC_LENGTH (elems
);
201 /* First check if there is at least one element that needs
202 folding. If there is none, we just return ELEMS. Otherwise create
203 and return a new tree vector that contains the folded versions of
204 ELEMS. This is to avoid allocating memory if we don't need
206 for (i
= 0; i
< vec_len
; ++i
)
208 if (template_arg_needs_folding (TREE_VEC_ELT (elems
, i
)))
214 folded_elems
= make_tree_vec (vec_len
);
215 for (i
= 0; i
< vec_len
; ++i
)
217 tree elem
= TREE_VEC_ELT (elems
, i
);
218 TREE_VEC_ELT (folded_elems
, i
) =
219 (elem
&& !TYPE_P (elem
)) ? cplus_expand_constant (elem
) : elem
;
225 /* The C++ implementation of the LANG_HOOKS_GET_INNERMOST_GENERIC_ARGS
226 hook. It returns the innermost template arguments of type T, and
227 makes sure those arguments are folded enough for the debug info
231 get_template_innermost_arguments_folded (const_tree t
)
233 return fold_cplus_constants (get_template_innermost_arguments (t
));
237 get_template_argument_pack_elems_folded (const_tree t
)
239 return fold_cplus_constants (get_template_argument_pack_elems (t
));
242 #include "gt-cp-cp-lang.h"
243 #include "gtype-cp.h"