1 /* Definitions for C parsing and type checking.
2 Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
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 2, 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 COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
26 #include "diagnostic.h"
28 /* struct lang_identifier is private to c-decl.c, but langhooks.c needs to
29 know how big it is. This is sanity-checked in c-decl.c. */
30 #define C_SIZEOF_STRUCT_LANG_IDENTIFIER \
31 (sizeof (struct c_common_identifier) + 3 * sizeof (void *))
33 /* For gc purposes, return the most likely link for the longest chain. */
34 #define C_LANG_TREE_NODE_CHAIN_NEXT(T) \
35 ((union lang_tree_node *) \
36 (TREE_CODE (T) == INTEGER_TYPE ? TYPE_NEXT_VARIANT (T) \
37 : TREE_CODE (T) == COMPOUND_EXPR ? TREE_OPERAND (T, 1) \
40 /* Language-specific declaration information. */
42 struct lang_decl
GTY(())
44 /* The return types and parameter types may have variable size.
45 This is a list of any SAVE_EXPRs that need to be evaluated to
46 compute those sizes. */
50 /* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is read-only. */
51 #define C_TYPE_FIELDS_READONLY(TYPE) TREE_LANG_FLAG_1 (TYPE)
53 /* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is volatile. */
54 #define C_TYPE_FIELDS_VOLATILE(TYPE) TREE_LANG_FLAG_2 (TYPE)
56 /* In a RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE
57 nonzero if the definition of the type has already started. */
58 #define C_TYPE_BEING_DEFINED(TYPE) TYPE_LANG_FLAG_0 (TYPE)
60 /* In an incomplete RECORD_TYPE or UNION_TYPE, a list of variable
61 declarations whose type would be completed by completing that type. */
62 #define C_TYPE_INCOMPLETE_VARS(TYPE) TYPE_VFIELD (TYPE)
64 /* In an IDENTIFIER_NODE, nonzero if this identifier is actually a
65 keyword. C_RID_CODE (node) is then the RID_* value of the keyword,
66 and C_RID_YYCODE is the token number wanted by Yacc. */
67 #define C_IS_RESERVED_WORD(ID) TREE_LANG_FLAG_0 (ID)
69 struct lang_type
GTY(())
71 /* In a RECORD_TYPE, a sorted array of the fields of the type. */
72 struct sorted_fields_type
* GTY ((reorder ("resort_sorted_fields"))) s
;
73 /* In an ENUMERAL_TYPE, the min and max values. */
78 /* Record whether a type or decl was written with nonconstant size.
79 Note that TYPE_SIZE may have simplified to a constant. */
80 #define C_TYPE_VARIABLE_SIZE(TYPE) TYPE_LANG_FLAG_1 (TYPE)
81 #define C_DECL_VARIABLE_SIZE(TYPE) DECL_LANG_FLAG_0 (TYPE)
83 /* Record whether a typedef for type `int' was actually `signed int'. */
84 #define C_TYPEDEF_EXPLICITLY_SIGNED(EXP) DECL_LANG_FLAG_1 (EXP)
86 /* For a FUNCTION_DECL, nonzero if it was defined without an explicit
88 #define C_FUNCTION_IMPLICIT_INT(EXP) DECL_LANG_FLAG_1 (EXP)
90 /* For a FUNCTION_DECL, nonzero if it was an implicit declaration. */
91 #define C_DECL_IMPLICIT(EXP) DECL_LANG_FLAG_2 (EXP)
93 /* For FUNCTION_DECLs, evaluates true if the decl is built-in but has
95 #define C_DECL_DECLARED_BUILTIN(EXP) DECL_LANG_FLAG_3 (EXP)
97 /* Record whether a decl was declared register. This is strictly a
98 front-end flag, whereas DECL_REGISTER is used for code generation;
99 they may differ for structures with volatile fields. */
100 #define C_DECL_REGISTER(EXP) DECL_LANG_FLAG_4 (EXP)
102 /* Nonzero for a decl which either doesn't exist or isn't a prototype.
103 N.B. Could be simplified if all built-in decls had complete prototypes
104 (but this is presently difficult because some of them need FILE*). */
105 #define C_DECL_ISNT_PROTOTYPE(EXP) \
107 || (TYPE_ARG_TYPES (TREE_TYPE (EXP)) == 0 \
108 && !DECL_BUILT_IN (EXP)))
110 /* For FUNCTION_TYPE, a hidden list of types of arguments. The same as
111 TYPE_ARG_TYPES for functions with prototypes, but created for functions
112 without prototypes. */
113 #define TYPE_ACTUAL_ARG_TYPES(NODE) TYPE_LANG_SLOT_1 (NODE)
115 /* Record parser information about an expression that is irrelevant
116 for code generation alongside a tree representing its value. */
119 /* The value of the expression. */
121 /* Record the original binary operator of an expression, which may
122 have been changed by fold, STRING_CST for unparenthesised string
123 constants, or ERROR_MARK for other expressions (including
124 parenthesized expressions). */
125 enum tree_code original_code
;
128 /* Save and restore the variables in this file and elsewhere
129 that keep track of the progress of compilation of the current function.
130 Used for nested functions. */
132 struct language_function
GTY(())
134 struct c_language_function base
;
137 struct c_switch
* GTY((skip
)) x_switch_stack
;
140 int returns_abnormally
;
141 int warn_about_return_type
;
147 extern void c_parse_init (void);
149 /* in c-aux-info.c */
150 extern void gen_aux_info_record (tree
, int, int, int);
153 extern tree c_break_label
;
154 extern tree c_cont_label
;
156 extern int global_bindings_p (void);
157 extern void push_scope (void);
158 extern tree
pop_scope (void);
159 extern void insert_block (tree
);
160 extern tree
pushdecl (tree
);
161 extern void c_expand_body (tree
);
163 extern void c_init_decl_processing (void);
164 extern void c_dup_lang_specific_decl (tree
);
165 extern void c_print_identifier (FILE *, tree
, int);
166 extern tree
build_array_declarator (tree
, tree
, bool, bool);
167 extern tree
build_enumerator (tree
, tree
);
168 extern void check_for_loop_decls (void);
169 extern void mark_forward_parm_decls (void);
170 extern int complete_array_type (tree
, tree
, int);
171 extern void declare_parm_level (void);
172 extern void undeclared_variable (tree
);
173 extern tree
declare_label (tree
);
174 extern tree
define_label (location_t
, tree
);
175 extern void finish_decl (tree
, tree
, tree
);
176 extern tree
finish_enum (tree
, tree
, tree
);
177 extern void finish_function (void);
178 extern tree
finish_struct (tree
, tree
, tree
);
179 extern tree
get_parm_info (bool);
180 extern tree
grokfield (tree
, tree
, tree
);
181 extern tree
groktypename (tree
);
182 extern tree
groktypename_in_parm_context (tree
);
183 extern tree
implicitly_declare (tree
);
184 extern void keep_next_level (void);
185 extern tree
lookup_name (tree
);
186 extern void pending_xref_error (void);
187 extern void c_push_function_context (struct function
*);
188 extern void c_pop_function_context (struct function
*);
189 extern void push_parm_decl (tree
);
190 extern tree
pushdecl_top_level (tree
);
191 extern tree
set_array_declarator_inner (tree
, tree
, bool);
192 extern tree
builtin_function (const char *, tree
, int, enum built_in_class
,
194 extern void shadow_tag (tree
);
195 extern void shadow_tag_warned (tree
, int);
196 extern tree
start_enum (tree
);
197 extern int start_function (tree
, tree
, tree
);
198 extern tree
start_decl (tree
, tree
, bool, tree
);
199 extern tree
start_struct (enum tree_code
, tree
);
200 extern void store_parm_decls (void);
201 extern tree
xref_tag (enum tree_code
, tree
);
202 extern int c_expand_decl (tree
);
203 extern tree
build_c_parm (tree
, tree
, tree
);
204 extern tree
build_attrs_declarator (tree
, tree
);
205 extern tree
build_function_declarator (tree
, tree
);
206 extern tree
make_pointer_declarator (tree
, tree
);
208 /* in c-objc-common.c */
209 extern int c_disregard_inline_limits (tree
);
210 extern int c_cannot_inline_tree_fn (tree
*);
211 extern bool c_objc_common_init (void);
212 extern bool c_missing_noreturn_ok_p (tree
);
213 extern tree
c_objc_common_truthvalue_conversion (tree expr
);
214 extern int defer_fn (tree
);
215 extern bool c_warn_unused_global_decl (tree
);
216 extern void c_initialize_diagnostics (diagnostic_context
*);
218 #define c_build_type_variant(TYPE, CONST_P, VOLATILE_P) \
219 c_build_qualified_type ((TYPE), \
220 ((CONST_P) ? TYPE_QUAL_CONST : 0) | \
221 ((VOLATILE_P) ? TYPE_QUAL_VOLATILE : 0))
224 extern struct c_switch
*c_switch_stack
;
226 extern tree
require_complete_type (tree
);
227 extern int same_translation_unit_p (tree
, tree
);
228 extern int comptypes (tree
, tree
);
229 extern tree
c_size_in_bytes (tree
);
230 extern bool c_mark_addressable (tree
);
231 extern void c_incomplete_type_error (tree
, tree
);
232 extern tree
c_type_promotes_to (tree
);
233 extern tree
composite_type (tree
, tree
);
234 extern tree
build_component_ref (tree
, tree
);
235 extern tree
build_indirect_ref (tree
, const char *);
236 extern tree
build_array_ref (tree
, tree
);
237 extern tree
build_external_ref (tree
, int);
238 extern struct c_expr
parser_build_binary_op (enum tree_code
, struct c_expr
,
240 extern void readonly_error (tree
, const char *);
241 extern tree
build_conditional_expr (tree
, tree
, tree
);
242 extern tree
build_compound_expr (tree
, tree
);
243 extern tree
c_cast_expr (tree
, tree
);
244 extern tree
build_c_cast (tree
, tree
);
245 extern tree
build_modify_expr (tree
, enum tree_code
, tree
);
246 extern void store_init_value (tree
, tree
);
247 extern void error_init (const char *);
248 extern void pedwarn_init (const char *);
249 extern void maybe_warn_string_init (tree
, struct c_expr
);
250 extern void start_init (tree
, tree
, int);
251 extern void finish_init (void);
252 extern void really_start_incremental_init (tree
);
253 extern void push_init_level (int);
254 extern struct c_expr
pop_init_level (int);
255 extern void set_init_index (tree
, tree
);
256 extern void set_init_label (tree
);
257 extern void process_init_element (struct c_expr
);
258 extern tree
build_compound_literal (tree
, tree
);
259 extern void pedwarn_c90 (const char *, ...) ATTRIBUTE_PRINTF_1
;
260 extern void pedwarn_c99 (const char *, ...) ATTRIBUTE_PRINTF_1
;
261 extern tree
c_start_case (tree
);
262 extern void c_finish_case (tree
);
263 extern tree
build_asm_expr (tree
, tree
, tree
, tree
, bool);
264 extern tree
build_asm_stmt (tree
, tree
);
265 extern tree
c_convert_parm_for_inlining (tree
, tree
, tree
, int);
266 extern int c_types_compatible_p (tree
, tree
);
267 extern tree
c_begin_compound_stmt (bool);
268 extern tree
c_end_compound_stmt (tree
, bool);
269 extern void c_finish_if_stmt (location_t
, tree
, tree
, tree
, bool);
270 extern void c_finish_loop (location_t
, tree
, tree
, tree
, tree
, tree
, bool);
271 extern tree
c_begin_stmt_expr (void);
272 extern tree
c_finish_stmt_expr (tree
);
273 extern tree
c_process_expr_stmt (tree
);
274 extern tree
c_finish_expr_stmt (tree
);
275 extern tree
c_finish_return (tree
);
276 extern tree
c_finish_bc_stmt (tree
*, bool);
277 extern tree
c_finish_goto_label (tree
);
278 extern tree
c_finish_goto_ptr (tree
);
279 extern tree
build_offsetof (tree
, tree
);
281 /* Set to 0 at beginning of a function definition, set to 1 if
282 a return statement that specifies a return value is seen. */
284 extern int current_function_returns_value
;
286 /* Set to 0 at beginning of a function definition, set to 1 if
287 a return statement with no argument is seen. */
289 extern int current_function_returns_null
;
291 /* Set to 0 at beginning of a function definition, set to 1 if
292 a call to a noreturn function is seen. */
294 extern int current_function_returns_abnormally
;
296 /* Nonzero means we are reading code that came from a system header file. */
298 extern int system_header_p
;
300 /* True means global_bindings_p should return false even if the scope stack
301 says we are in file scope. */
303 extern bool c_override_global_bindings_to_false
;
305 /* True means we've initialized exception handling. */
306 extern bool c_eh_initialized_p
;
309 extern void c_finish_incomplete_decl (tree
);
310 extern void *get_current_scope (void);
311 extern void objc_mark_locals_volatile (void *);
312 extern void c_write_global_declarations (void);
314 /* In order for the format checking to accept the C frontend
315 diagnostic framework extensions, you must include this file before
316 toplev.h, not after. */
317 #define GCC_DIAG_STYLE __gcc_cdiag__
319 #endif /* ! GCC_C_TREE_H */