c-tree.h revision 90083
1/* Definitions for C parsing and type checking. 2 Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998, 3 1999, 2000, 2001, 2002 Free Software Foundation, Inc. 4 5This file is part of GCC. 6 7GCC is free software; you can redistribute it and/or modify it under 8the terms of the GNU General Public License as published by the Free 9Software Foundation; either version 2, or (at your option) any later 10version. 11 12GCC is distributed in the hope that it will be useful, but WITHOUT ANY 13WARRANTY; without even the implied warranty of MERCHANTABILITY or 14FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15for more details. 16 17You should have received a copy of the GNU General Public License 18along with GCC; see the file COPYING. If not, write to the Free 19Software Foundation, 59 Temple Place - Suite 330, Boston, MA 2002111-1307, USA. */ 21 22/* $FreeBSD: head/contrib/gcc/c-tree.h 90083 2002-02-01 18:54:38Z obrien $ */ 23 24#ifndef GCC_C_TREE_H 25#define GCC_C_TREE_H 26 27#include "c-common.h" 28 29/* Language-dependent contents of an identifier. */ 30 31/* The limbo_value is used for block level extern declarations, which need 32 to be type checked against subsequent extern declarations. They can't 33 be referenced after they fall out of scope, so they can't be global. 34 35 The rid_code field is used for keywords. It is in all 36 lang_identifier nodes, because some keywords are only special in a 37 particular context. */ 38 39struct lang_identifier 40{ 41 struct c_common_identifier ignore; 42 tree global_value, local_value, label_value, implicit_decl; 43 tree error_locus, limbo_value; 44}; 45 46/* Language-specific declaration information. */ 47 48struct lang_decl 49{ 50 struct c_lang_decl base; 51 /* The return types and parameter types may have variable size. 52 This is a list of any SAVE_EXPRs that need to be evaluated to 53 compute those sizes. */ 54 tree pending_sizes; 55}; 56 57/* Macros for access to language-specific slots in an identifier. */ 58/* Each of these slots contains a DECL node or null. */ 59 60/* This represents the value which the identifier has in the 61 file-scope namespace. */ 62#define IDENTIFIER_GLOBAL_VALUE(NODE) \ 63 (((struct lang_identifier *) (NODE))->global_value) 64/* This represents the value which the identifier has in the current 65 scope. */ 66#define IDENTIFIER_LOCAL_VALUE(NODE) \ 67 (((struct lang_identifier *) (NODE))->local_value) 68/* This represents the value which the identifier has as a label in 69 the current label scope. */ 70#define IDENTIFIER_LABEL_VALUE(NODE) \ 71 (((struct lang_identifier *) (NODE))->label_value) 72/* This records the extern decl of this identifier, if it has had one 73 at any point in this compilation. */ 74#define IDENTIFIER_LIMBO_VALUE(NODE) \ 75 (((struct lang_identifier *) (NODE))->limbo_value) 76/* This records the implicit function decl of this identifier, if it 77 has had one at any point in this compilation. */ 78#define IDENTIFIER_IMPLICIT_DECL(NODE) \ 79 (((struct lang_identifier *) (NODE))->implicit_decl) 80/* This is the last function in which we printed an "undefined variable" 81 message for this identifier. Value is a FUNCTION_DECL or null. */ 82#define IDENTIFIER_ERROR_LOCUS(NODE) \ 83 (((struct lang_identifier *) (NODE))->error_locus) 84 85/* In identifiers, C uses the following fields in a special way: 86 TREE_PUBLIC to record that there was a previous local extern decl. 87 TREE_USED to record that such a decl was used. 88 TREE_ADDRESSABLE to record that the address of such a decl was used. */ 89 90/* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is read-only. */ 91#define C_TYPE_FIELDS_READONLY(TYPE) TREE_LANG_FLAG_1 (TYPE) 92 93/* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is volatile. */ 94#define C_TYPE_FIELDS_VOLATILE(TYPE) TREE_LANG_FLAG_2 (TYPE) 95 96/* In a RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE 97 nonzero if the definition of the type has already started. */ 98#define C_TYPE_BEING_DEFINED(TYPE) TYPE_LANG_FLAG_0 (TYPE) 99 100/* In an IDENTIFIER_NODE, nonzero if this identifier is actually a 101 keyword. C_RID_CODE (node) is then the RID_* value of the keyword, 102 and C_RID_YYCODE is the token number wanted by Yacc. */ 103#define C_IS_RESERVED_WORD(ID) TREE_LANG_FLAG_0 (ID) 104 105/* This function was declared inline. This flag controls the linkage 106 semantics of 'inline'; whether or not the function is inlined is 107 controlled by DECL_INLINE. */ 108#define DECL_DECLARED_INLINE_P(NODE) \ 109 (DECL_LANG_SPECIFIC (NODE)->base.declared_inline) 110 111/* In a RECORD_TYPE, a sorted array of the fields of the type. */ 112struct lang_type 113{ 114 int len; 115 tree elts[1]; 116}; 117 118/* Record whether a type or decl was written with nonconstant size. 119 Note that TYPE_SIZE may have simplified to a constant. */ 120#define C_TYPE_VARIABLE_SIZE(TYPE) TYPE_LANG_FLAG_1 (TYPE) 121#define C_DECL_VARIABLE_SIZE(TYPE) DECL_LANG_FLAG_0 (TYPE) 122 123#if 0 /* Not used. */ 124/* Record whether a decl for a function or function pointer has 125 already been mentioned (in a warning) because it was called 126 but didn't have a prototype. */ 127#define C_MISSING_PROTOTYPE_WARNED(DECL) DECL_LANG_FLAG_2 (DECL) 128#endif 129 130/* Store a value in that field. */ 131#define C_SET_EXP_ORIGINAL_CODE(EXP, CODE) \ 132 (TREE_COMPLEXITY (EXP) = (int) (CODE)) 133 134/* Record whether a typedef for type `int' was actually `signed int'. */ 135#define C_TYPEDEF_EXPLICITLY_SIGNED(EXP) DECL_LANG_FLAG_1 (EXP) 136 137/* Nonzero for a declaration of a built in function if there has been no 138 occasion that would declare the function in ordinary C. 139 Using the function draws a pedantic warning in this case. */ 140#define C_DECL_ANTICIPATED(EXP) DECL_LANG_FLAG_3 (EXP) 141 142/* For FUNCTION_TYPE, a hidden list of types of arguments. The same as 143 TYPE_ARG_TYPES for functions with prototypes, but created for functions 144 without prototypes. */ 145#define TYPE_ACTUAL_ARG_TYPES(NODE) TYPE_BINFO (NODE) 146 147 148/* in c-lang.c and objc-act.c */ 149extern tree lookup_interface PARAMS ((tree)); 150extern tree is_class_name PARAMS ((tree)); 151extern void maybe_objc_check_decl PARAMS ((tree)); 152extern void finish_file PARAMS ((void)); 153extern int maybe_objc_comptypes PARAMS ((tree, tree, int)); 154extern tree maybe_building_objc_message_expr PARAMS ((void)); 155extern int recognize_objc_keyword PARAMS ((void)); 156extern tree lookup_objc_ivar PARAMS ((tree)); 157 158 159/* in c-parse.in */ 160extern void c_parse_init PARAMS ((void)); 161extern void c_set_yydebug PARAMS ((int)); 162extern int yyparse_1 PARAMS ((void)); 163 164/* in c-aux-info.c */ 165extern void gen_aux_info_record PARAMS ((tree, int, int, int)); 166 167/* in c-decl.c */ 168extern void c_init_decl_processing PARAMS ((void)); 169extern void c_print_identifier PARAMS ((FILE *, tree, int)); 170extern tree build_array_declarator PARAMS ((tree, tree, int, int)); 171extern tree build_enumerator PARAMS ((tree, tree)); 172extern int c_decode_option PARAMS ((int, char **)); 173extern void c_mark_varargs PARAMS ((void)); 174extern void check_for_loop_decls PARAMS ((void)); 175extern void clear_parm_order PARAMS ((void)); 176extern int complete_array_type PARAMS ((tree, tree, int)); 177extern void declare_parm_level PARAMS ((int)); 178extern tree define_label PARAMS ((const char *, int, 179 tree)); 180extern void finish_decl PARAMS ((tree, tree, tree)); 181extern tree finish_enum PARAMS ((tree, tree, tree)); 182extern void finish_function PARAMS ((int)); 183extern tree finish_struct PARAMS ((tree, tree, tree)); 184extern tree get_parm_info PARAMS ((int)); 185extern tree grokfield PARAMS ((const char *, int, tree, tree, tree)); 186extern tree groktypename PARAMS ((tree)); 187extern tree groktypename_in_parm_context PARAMS ((tree)); 188extern tree implicitly_declare PARAMS ((tree)); 189extern void implicit_decl_warning PARAMS ((tree)); 190extern int in_parm_level_p PARAMS ((void)); 191extern void keep_next_level PARAMS ((void)); 192extern int kept_level_p PARAMS ((void)); 193extern tree lookup_name PARAMS ((tree)); 194extern tree lookup_name_current_level PARAMS ((tree)); 195extern void parmlist_tags_warning PARAMS ((void)); 196extern void pending_xref_error PARAMS ((void)); 197extern void mark_c_function_context PARAMS ((struct function *)); 198extern void push_c_function_context PARAMS ((struct function *)); 199extern void pop_c_function_context PARAMS ((struct function *)); 200extern void pop_label_level PARAMS ((void)); 201extern void push_label_level PARAMS ((void)); 202extern void push_parm_decl PARAMS ((tree)); 203extern tree pushdecl_top_level PARAMS ((tree)); 204extern void pushtag PARAMS ((tree, tree)); 205extern tree set_array_declarator_type PARAMS ((tree, tree, int)); 206extern tree shadow_label PARAMS ((tree)); 207extern void shadow_tag PARAMS ((tree)); 208extern void shadow_tag_warned PARAMS ((tree, int)); 209extern tree start_enum PARAMS ((tree)); 210extern int start_function PARAMS ((tree, tree, tree)); 211extern tree start_decl PARAMS ((tree, tree, int, 212 tree)); 213extern tree start_struct PARAMS ((enum tree_code, tree)); 214extern void store_parm_decls PARAMS ((void)); 215extern tree xref_tag PARAMS ((enum tree_code, tree)); 216extern tree c_begin_compound_stmt PARAMS ((void)); 217extern void c_expand_deferred_function PARAMS ((tree)); 218extern void c_expand_decl_stmt PARAMS ((tree)); 219 220 221/* in c-objc-common.c */ 222extern int c_disregard_inline_limits PARAMS ((tree)); 223extern int c_cannot_inline_tree_fn PARAMS ((tree *)); 224extern const char *c_objc_common_init PARAMS ((const char *)); 225extern int c_missing_noreturn_ok_p PARAMS ((tree)); 226extern void c_objc_common_finish_file PARAMS ((void)); 227extern int defer_fn PARAMS ((tree)); 228 229#define c_build_type_variant(TYPE, CONST_P, VOLATILE_P) \ 230 c_build_qualified_type ((TYPE), \ 231 ((CONST_P) ? TYPE_QUAL_CONST : 0) | \ 232 ((VOLATILE_P) ? TYPE_QUAL_VOLATILE : 0)) 233 234/* in c-typeck.c */ 235extern tree require_complete_type PARAMS ((tree)); 236extern int comptypes PARAMS ((tree, tree)); 237extern tree c_sizeof_nowarn PARAMS ((tree)); 238extern tree c_size_in_bytes PARAMS ((tree)); 239extern tree build_component_ref PARAMS ((tree, tree)); 240extern tree build_indirect_ref PARAMS ((tree, const char *)); 241extern tree build_array_ref PARAMS ((tree, tree)); 242extern tree build_external_ref PARAMS ((tree, int)); 243extern tree parser_build_binary_op PARAMS ((enum tree_code, 244 tree, tree)); 245extern void readonly_warning PARAMS ((tree, const char *)); 246extern tree build_conditional_expr PARAMS ((tree, tree, tree)); 247extern tree build_compound_expr PARAMS ((tree)); 248extern tree c_cast_expr PARAMS ((tree, tree)); 249extern tree build_c_cast PARAMS ((tree, tree)); 250extern tree build_modify_expr PARAMS ((tree, enum tree_code, 251 tree)); 252extern void store_init_value PARAMS ((tree, tree)); 253extern void error_init PARAMS ((const char *)); 254extern void pedwarn_init PARAMS ((const char *)); 255extern void start_init PARAMS ((tree, tree, int)); 256extern void finish_init PARAMS ((void)); 257extern void really_start_incremental_init PARAMS ((tree)); 258extern void push_init_level PARAMS ((int)); 259extern tree pop_init_level PARAMS ((int)); 260extern void set_init_index PARAMS ((tree, tree)); 261extern void set_init_label PARAMS ((tree)); 262extern void process_init_element PARAMS ((tree)); 263extern tree build_compound_literal PARAMS ((tree, tree)); 264extern void pedwarn_c99 PARAMS ((const char *, ...)) 265 ATTRIBUTE_PRINTF_1; 266extern tree c_start_case PARAMS ((tree)); 267extern void c_finish_case PARAMS ((void)); 268extern tree simple_asm_stmt PARAMS ((tree)); 269extern tree build_asm_stmt PARAMS ((tree, tree, tree, 270 tree, tree)); 271 272/* Set to 0 at beginning of a function definition, set to 1 if 273 a return statement that specifies a return value is seen. */ 274 275extern int current_function_returns_value; 276 277/* Set to 0 at beginning of a function definition, set to 1 if 278 a return statement with no argument is seen. */ 279 280extern int current_function_returns_null; 281 282/* Nonzero means the expression being parsed will never be evaluated. 283 This is a count, since unevaluated expressions can nest. */ 284 285extern int skip_evaluation; 286 287/* Nonzero means `$' can be in an identifier. */ 288 289extern int dollars_in_ident; 290 291/* Nonzero means allow type mismatches in conditional expressions; 292 just make their values `void'. */ 293 294extern int flag_cond_mismatch; 295 296/* Nonzero means don't recognize the keyword `asm'. */ 297 298extern int flag_no_asm; 299 300/* Nonzero means warn about implicit declarations. */ 301 302extern int warn_implicit; 303 304/* Nonzero means warn for all old-style non-prototype function decls. */ 305 306extern int warn_strict_prototypes; 307 308/* Nonzero means warn about multiple (redundant) decls for the same single 309 variable or function. */ 310 311extern int warn_redundant_decls; 312 313/* Nonzero means warn about extern declarations of objects not at 314 file-scope level and about *all* declarations of functions (whether 315 extern or static) not at file-scope level. Note that we exclude 316 implicit function declarations. To get warnings about those, use 317 -Wimplicit. */ 318 319extern int warn_nested_externs; 320 321/* Nonzero means warn about pointer casts that can drop a type qualifier 322 from the pointer target type. */ 323 324extern int warn_cast_qual; 325 326/* Nonzero means warn when casting a function call to a type that does 327 not match the return type (e.g. (float)sqrt() or (anything*)malloc() 328 when there is no previous declaration of sqrt or malloc. */ 329 330extern int warn_bad_function_cast; 331 332/* Warn about traditional constructs whose meanings changed in ANSI C. */ 333 334extern int warn_traditional; 335 336/* Warn about a subscript that has type char. */ 337 338extern int warn_char_subscripts; 339 340/* Warn if main is suspicious. */ 341 342extern int warn_main; 343 344/* Nonzero means to allow single precision math even if we're generally 345 being traditional. */ 346extern int flag_allow_single_precision; 347 348/* Warn if initializer is not completely bracketed. */ 349 350extern int warn_missing_braces; 351 352/* Warn about comparison of signed and unsigned values. */ 353 354extern int warn_sign_compare; 355 356/* Warn about testing equality of floating point numbers. */ 357 358extern int warn_float_equal; 359 360/* Warn about multicharacter constants. */ 361 362extern int warn_multichar; 363 364/* Nonzero means we are reading code that came from a system header file. */ 365 366extern int system_header_p; 367 368/* Warn about implicit declarations. 1 = warning, 2 = error. */ 369extern int mesg_implicit_function_declaration; 370 371/* In c-decl.c */ 372extern void finish_incomplete_decl PARAMS ((tree)); 373 374extern tree static_ctors; 375extern tree static_dtors; 376 377#endif /* ! GCC_C_TREE_H */ 378