1/* Definitions for C parsing and type checking. 2 Copyright (C) 1987-2015 Free Software Foundation, Inc. 3 4This file is part of GCC. 5 6GCC is free software; you can redistribute it and/or modify it under 7the terms of the GNU General Public License as published by the Free 8Software Foundation; either version 3, or (at your option) any later 9version. 10 11GCC is distributed in the hope that it will be useful, but WITHOUT ANY 12WARRANTY; without even the implied warranty of MERCHANTABILITY or 13FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14for more details. 15 16You should have received a copy of the GNU General Public License 17along with GCC; see the file COPYING3. If not see 18<http://www.gnu.org/licenses/>. */ 19 20#ifndef GCC_C_TREE_H 21#define GCC_C_TREE_H 22 23#include "c-family/c-common.h" 24#include "diagnostic.h" 25 26/* struct lang_identifier is private to c-decl.c, but langhooks.c needs to 27 know how big it is. This is sanity-checked in c-decl.c. */ 28#define C_SIZEOF_STRUCT_LANG_IDENTIFIER \ 29 (sizeof (struct c_common_identifier) + 3 * sizeof (void *)) 30 31/* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is read-only. */ 32#define C_TYPE_FIELDS_READONLY(TYPE) TREE_LANG_FLAG_1 (TYPE) 33 34/* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is volatile. */ 35#define C_TYPE_FIELDS_VOLATILE(TYPE) TREE_LANG_FLAG_2 (TYPE) 36 37/* In a RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE 38 nonzero if the definition of the type has already started. */ 39#define C_TYPE_BEING_DEFINED(TYPE) TYPE_LANG_FLAG_0 (TYPE) 40 41/* In an incomplete RECORD_TYPE or UNION_TYPE, a list of variable 42 declarations whose type would be completed by completing that type. */ 43#define C_TYPE_INCOMPLETE_VARS(TYPE) TYPE_VFIELD (TYPE) 44 45/* In an IDENTIFIER_NODE, nonzero if this identifier is actually a 46 keyword. C_RID_CODE (node) is then the RID_* value of the keyword, 47 and C_RID_YYCODE is the token number wanted by Yacc. */ 48#define C_IS_RESERVED_WORD(ID) TREE_LANG_FLAG_0 (ID) 49 50/* Record whether a type or decl was written with nonconstant size. 51 Note that TYPE_SIZE may have simplified to a constant. */ 52#define C_TYPE_VARIABLE_SIZE(TYPE) TYPE_LANG_FLAG_1 (TYPE) 53#define C_DECL_VARIABLE_SIZE(TYPE) DECL_LANG_FLAG_0 (TYPE) 54 55/* Record whether a type is defined inside a struct or union type. 56 This is used for -Wc++-compat. */ 57#define C_TYPE_DEFINED_IN_STRUCT(TYPE) TYPE_LANG_FLAG_2 (TYPE) 58 59/* Record whether an "incomplete type" error was given for the type. */ 60#define C_TYPE_ERROR_REPORTED(TYPE) TYPE_LANG_FLAG_3 (TYPE) 61 62/* Record whether a typedef for type `int' was actually `signed int'. */ 63#define C_TYPEDEF_EXPLICITLY_SIGNED(EXP) DECL_LANG_FLAG_1 (EXP) 64 65/* For a FUNCTION_DECL, nonzero if it was defined without an explicit 66 return type. */ 67#define C_FUNCTION_IMPLICIT_INT(EXP) DECL_LANG_FLAG_1 (EXP) 68 69/* For a FUNCTION_DECL, nonzero if it was an implicit declaration. */ 70#define C_DECL_IMPLICIT(EXP) DECL_LANG_FLAG_2 (EXP) 71 72/* For a PARM_DECL, nonzero if it was declared as an array. */ 73#define C_ARRAY_PARAMETER(NODE) DECL_LANG_FLAG_0 (NODE) 74 75/* For FUNCTION_DECLs, evaluates true if the decl is built-in but has 76 been declared. */ 77#define C_DECL_DECLARED_BUILTIN(EXP) \ 78 DECL_LANG_FLAG_3 (FUNCTION_DECL_CHECK (EXP)) 79 80/* For FUNCTION_DECLs, evaluates true if the decl is built-in, has a 81 built-in prototype and does not have a non-built-in prototype. */ 82#define C_DECL_BUILTIN_PROTOTYPE(EXP) \ 83 DECL_LANG_FLAG_6 (FUNCTION_DECL_CHECK (EXP)) 84 85/* Record whether a decl was declared register. This is strictly a 86 front-end flag, whereas DECL_REGISTER is used for code generation; 87 they may differ for structures with volatile fields. */ 88#define C_DECL_REGISTER(EXP) DECL_LANG_FLAG_4 (EXP) 89 90/* Record whether a decl was used in an expression anywhere except an 91 unevaluated operand of sizeof / typeof / alignof. This is only 92 used for functions declared static but not defined, though outside 93 sizeof and typeof it is set for other function decls as well. */ 94#define C_DECL_USED(EXP) DECL_LANG_FLAG_5 (FUNCTION_DECL_CHECK (EXP)) 95 96/* Record whether a variable has been declared threadprivate by 97 #pragma omp threadprivate. */ 98#define C_DECL_THREADPRIVATE_P(DECL) DECL_LANG_FLAG_3 (VAR_DECL_CHECK (DECL)) 99 100/* Nonzero for a decl which either doesn't exist or isn't a prototype. 101 N.B. Could be simplified if all built-in decls had complete prototypes 102 (but this is presently difficult because some of them need FILE*). */ 103#define C_DECL_ISNT_PROTOTYPE(EXP) \ 104 (EXP == 0 \ 105 || (!prototype_p (TREE_TYPE (EXP)) \ 106 && !DECL_BUILT_IN (EXP))) 107 108/* For FUNCTION_TYPE, a hidden list of types of arguments. The same as 109 TYPE_ARG_TYPES for functions with prototypes, but created for functions 110 without prototypes. */ 111#define TYPE_ACTUAL_ARG_TYPES(NODE) TYPE_LANG_SLOT_1 (NODE) 112 113/* For a CONSTRUCTOR, whether some initializer contains a 114 subexpression meaning it is not a constant expression. */ 115#define CONSTRUCTOR_NON_CONST(EXPR) TREE_LANG_FLAG_1 (CONSTRUCTOR_CHECK (EXPR)) 116 117/* Record parser information about an expression that is irrelevant 118 for code generation alongside a tree representing its value. */ 119struct c_expr 120{ 121 /* The value of the expression. */ 122 tree value; 123 /* Record the original unary/binary operator of an expression, which may 124 have been changed by fold, STRING_CST for unparenthesized string 125 constants, C_MAYBE_CONST_EXPR for __builtin_constant_p calls 126 (even if parenthesized), for subexpressions, and for non-constant 127 initializers, or ERROR_MARK for other expressions (including 128 parenthesized expressions). */ 129 enum tree_code original_code; 130 /* If not NULL, the original type of an expression. This will 131 differ from the type of the value field for an enum constant. 132 The type of an enum constant is a plain integer type, but this 133 field will be the enum type. */ 134 tree original_type; 135}; 136 137/* Type alias for struct c_expr. This allows to use the structure 138 inside the VEC types. */ 139typedef struct c_expr c_expr_t; 140 141/* A kind of type specifier. Note that this information is currently 142 only used to distinguish tag definitions, tag references and typeof 143 uses. */ 144enum c_typespec_kind { 145 /* No typespec. This appears only in struct c_declspec. */ 146 ctsk_none, 147 /* A reserved keyword type specifier. */ 148 ctsk_resword, 149 /* A reference to a tag, previously declared, such as "struct foo". 150 This includes where the previous declaration was as a different 151 kind of tag, in which case this is only valid if shadowing that 152 tag in an inner scope. */ 153 ctsk_tagref, 154 /* A reference to a tag, not previously declared in a visible 155 scope. */ 156 ctsk_tagfirstref, 157 /* A definition of a tag such as "struct foo { int a; }". */ 158 ctsk_tagdef, 159 /* A typedef name. */ 160 ctsk_typedef, 161 /* An ObjC-specific kind of type specifier. */ 162 ctsk_objc, 163 /* A typeof specifier, or _Atomic ( type-name ). */ 164 ctsk_typeof 165}; 166 167/* A type specifier: this structure is created in the parser and 168 passed to declspecs_add_type only. */ 169struct c_typespec { 170 /* What kind of type specifier this is. */ 171 enum c_typespec_kind kind; 172 /* Whether the expression has operands suitable for use in constant 173 expressions. */ 174 bool expr_const_operands; 175 /* The specifier itself. */ 176 tree spec; 177 /* An expression to be evaluated before the type specifier, in the 178 case of typeof specifiers, or NULL otherwise or if no such 179 expression is required for a particular typeof specifier. In 180 particular, when typeof is applied to an expression of variably 181 modified type, that expression must be evaluated in order to 182 determine array sizes that form part of the type, but the 183 expression itself (as opposed to the array sizes) forms no part 184 of the type and so needs to be recorded separately. */ 185 tree expr; 186}; 187 188/* A storage class specifier. */ 189enum c_storage_class { 190 csc_none, 191 csc_auto, 192 csc_extern, 193 csc_register, 194 csc_static, 195 csc_typedef 196}; 197 198/* A type specifier keyword "void", "_Bool", "char", "int", "float", 199 "double", "_Decimal32", "_Decimal64", "_Decimal128", "_Fract", "_Accum", 200 or none of these. */ 201enum c_typespec_keyword { 202 cts_none, 203 cts_void, 204 cts_bool, 205 cts_char, 206 cts_int, 207 cts_float, 208 cts_int_n, 209 cts_double, 210 cts_dfloat32, 211 cts_dfloat64, 212 cts_dfloat128, 213 cts_fract, 214 cts_accum, 215 cts_auto_type 216}; 217 218/* This enum lists all the possible declarator specifiers, storage 219 class or attribute that a user can write. There is at least one 220 enumerator per possible declarator specifier in the struct 221 c_declspecs below. 222 223 It is used to index the array of declspec locations in struct 224 c_declspecs. */ 225enum c_declspec_word { 226 cdw_typespec /* A catch-all for a typespec. */, 227 cdw_storage_class /* A catch-all for a storage class */, 228 cdw_attributes, 229 cdw_typedef, 230 cdw_explicit_signed, 231 cdw_deprecated, 232 cdw_default_int, 233 cdw_long, 234 cdw_long_long, 235 cdw_short, 236 cdw_signed, 237 cdw_unsigned, 238 cdw_complex, 239 cdw_inline, 240 cdw_noreturn, 241 cdw_thread, 242 cdw_const, 243 cdw_volatile, 244 cdw_restrict, 245 cdw_saturating, 246 cdw_alignas, 247 cdw_address_space, 248 cdw_number_of_elements /* This one must always be the last 249 enumerator. */ 250}; 251 252/* A sequence of declaration specifiers in C. When a new declaration 253 specifier is added, please update the enum c_declspec_word above 254 accordingly. */ 255struct c_declspecs { 256 source_location locations[cdw_number_of_elements]; 257 /* The type specified, if a single type specifier such as a struct, 258 union or enum specifier, typedef name or typeof specifies the 259 whole type, or NULL_TREE if none or a keyword such as "void" or 260 "char" is used. Does not include qualifiers. */ 261 tree type; 262 /* Any expression to be evaluated before the type, from a typeof 263 specifier. */ 264 tree expr; 265 /* The attributes from a typedef decl. */ 266 tree decl_attr; 267 /* When parsing, the attributes. Outside the parser, this will be 268 NULL; attributes (possibly from multiple lists) will be passed 269 separately. */ 270 tree attrs; 271 /* The base-2 log of the greatest alignment required by an _Alignas 272 specifier, in bytes, or -1 if no such specifiers with nonzero 273 alignment. */ 274 int align_log; 275 /* For the __intN declspec, this stores the index into the int_n_* arrays. */ 276 int int_n_idx; 277 /* The storage class specifier, or csc_none if none. */ 278 enum c_storage_class storage_class; 279 /* Any type specifier keyword used such as "int", not reflecting 280 modifiers such as "short", or cts_none if none. */ 281 ENUM_BITFIELD (c_typespec_keyword) typespec_word : 8; 282 /* The kind of type specifier if one has been seen, ctsk_none 283 otherwise. */ 284 ENUM_BITFIELD (c_typespec_kind) typespec_kind : 3; 285 /* Whether any expressions in typeof specifiers may appear in 286 constant expressions. */ 287 BOOL_BITFIELD expr_const_operands : 1; 288 /* Whether any declaration specifiers have been seen at all. */ 289 BOOL_BITFIELD declspecs_seen_p : 1; 290 /* Whether something other than a storage class specifier or 291 attribute has been seen. This is used to warn for the 292 obsolescent usage of storage class specifiers other than at the 293 start of the list. (Doing this properly would require function 294 specifiers to be handled separately from storage class 295 specifiers.) */ 296 BOOL_BITFIELD non_sc_seen_p : 1; 297 /* Whether the type is specified by a typedef or typeof name. */ 298 BOOL_BITFIELD typedef_p : 1; 299 /* Whether the type is explicitly "signed" or specified by a typedef 300 whose type is explicitly "signed". */ 301 BOOL_BITFIELD explicit_signed_p : 1; 302 /* Whether the specifiers include a deprecated typedef. */ 303 BOOL_BITFIELD deprecated_p : 1; 304 /* Whether the type defaulted to "int" because there were no type 305 specifiers. */ 306 BOOL_BITFIELD default_int_p : 1; 307 /* Whether "long" was specified. */ 308 BOOL_BITFIELD long_p : 1; 309 /* Whether "long" was specified more than once. */ 310 BOOL_BITFIELD long_long_p : 1; 311 /* Whether "short" was specified. */ 312 BOOL_BITFIELD short_p : 1; 313 /* Whether "signed" was specified. */ 314 BOOL_BITFIELD signed_p : 1; 315 /* Whether "unsigned" was specified. */ 316 BOOL_BITFIELD unsigned_p : 1; 317 /* Whether "complex" was specified. */ 318 BOOL_BITFIELD complex_p : 1; 319 /* Whether "inline" was specified. */ 320 BOOL_BITFIELD inline_p : 1; 321 /* Whether "_Noreturn" was speciied. */ 322 BOOL_BITFIELD noreturn_p : 1; 323 /* Whether "__thread" or "_Thread_local" was specified. */ 324 BOOL_BITFIELD thread_p : 1; 325 /* Whether "__thread" rather than "_Thread_local" was specified. */ 326 BOOL_BITFIELD thread_gnu_p : 1; 327 /* Whether "const" was specified. */ 328 BOOL_BITFIELD const_p : 1; 329 /* Whether "volatile" was specified. */ 330 BOOL_BITFIELD volatile_p : 1; 331 /* Whether "restrict" was specified. */ 332 BOOL_BITFIELD restrict_p : 1; 333 /* Whether "_Atomic" was specified. */ 334 BOOL_BITFIELD atomic_p : 1; 335 /* Whether "_Sat" was specified. */ 336 BOOL_BITFIELD saturating_p : 1; 337 /* Whether any alignment specifier (even with zero alignment) was 338 specified. */ 339 BOOL_BITFIELD alignas_p : 1; 340 /* The address space that the declaration belongs to. */ 341 addr_space_t address_space; 342}; 343 344/* The various kinds of declarators in C. */ 345enum c_declarator_kind { 346 /* An identifier. */ 347 cdk_id, 348 /* A function. */ 349 cdk_function, 350 /* An array. */ 351 cdk_array, 352 /* A pointer. */ 353 cdk_pointer, 354 /* Parenthesized declarator with nested attributes. */ 355 cdk_attrs 356}; 357 358typedef struct c_arg_tag_d { 359 /* The argument name. */ 360 tree id; 361 /* The type of the argument. */ 362 tree type; 363} c_arg_tag; 364 365 366/* Information about the parameters in a function declarator. */ 367struct c_arg_info { 368 /* A list of parameter decls. */ 369 tree parms; 370 /* A list of structure, union and enum tags defined. */ 371 vec<c_arg_tag, va_gc> *tags; 372 /* A list of argument types to go in the FUNCTION_TYPE. */ 373 tree types; 374 /* A list of non-parameter decls (notably enumeration constants) 375 defined with the parameters. */ 376 tree others; 377 /* A compound expression of VLA sizes from the parameters, or NULL. 378 In a function definition, these are used to ensure that 379 side-effects in sizes of arrays converted to pointers (such as a 380 parameter int i[n++]) take place; otherwise, they are 381 ignored. */ 382 tree pending_sizes; 383 /* True when these arguments had [*]. */ 384 BOOL_BITFIELD had_vla_unspec : 1; 385}; 386 387/* A declarator. */ 388struct c_declarator { 389 /* The kind of declarator. */ 390 enum c_declarator_kind kind; 391 location_t id_loc; /* Currently only set for cdk_id, cdk_array. */ 392 /* Except for cdk_id, the contained declarator. For cdk_id, NULL. */ 393 struct c_declarator *declarator; 394 union { 395 /* For identifiers, an IDENTIFIER_NODE or NULL_TREE if an abstract 396 declarator. */ 397 tree id; 398 /* For functions. */ 399 struct c_arg_info *arg_info; 400 /* For arrays. */ 401 struct { 402 /* The array dimension, or NULL for [] and [*]. */ 403 tree dimen; 404 /* The qualifiers inside []. */ 405 int quals; 406 /* The attributes (currently ignored) inside []. */ 407 tree attrs; 408 /* Whether [static] was used. */ 409 BOOL_BITFIELD static_p : 1; 410 /* Whether [*] was used. */ 411 BOOL_BITFIELD vla_unspec_p : 1; 412 } array; 413 /* For pointers, the qualifiers on the pointer type. */ 414 int pointer_quals; 415 /* For attributes. */ 416 tree attrs; 417 } u; 418}; 419 420/* A type name. */ 421struct c_type_name { 422 /* The declaration specifiers. */ 423 struct c_declspecs *specs; 424 /* The declarator. */ 425 struct c_declarator *declarator; 426}; 427 428/* A parameter. */ 429struct c_parm { 430 /* The declaration specifiers, minus any prefix attributes. */ 431 struct c_declspecs *specs; 432 /* The attributes. */ 433 tree attrs; 434 /* The declarator. */ 435 struct c_declarator *declarator; 436}; 437 438/* Used when parsing an enum. Initialized by start_enum. */ 439struct c_enum_contents 440{ 441 /* While defining an enum type, this is 1 plus the last enumerator 442 constant value. */ 443 tree enum_next_value; 444 445 /* Nonzero means that there was overflow computing enum_next_value. */ 446 int enum_overflow; 447}; 448 449/* A type of reference to a static identifier in an inline 450 function. */ 451enum c_inline_static_type { 452 /* Identifier with internal linkage used in function that may be an 453 inline definition (i.e., file-scope static). */ 454 csi_internal, 455 /* Modifiable object with static storage duration defined in 456 function that may be an inline definition (i.e., local 457 static). */ 458 csi_modifiable 459}; 460 461 462/* in c-parser.c */ 463extern void c_parse_init (void); 464 465/* in c-aux-info.c */ 466extern void gen_aux_info_record (tree, int, int, int); 467 468/* in c-decl.c */ 469struct c_spot_bindings; 470struct c_struct_parse_info; 471extern struct obstack parser_obstack; 472extern tree c_break_label; 473extern tree c_cont_label; 474 475extern bool global_bindings_p (void); 476extern void push_scope (void); 477extern tree pop_scope (void); 478extern void c_bindings_start_stmt_expr (struct c_spot_bindings *); 479extern void c_bindings_end_stmt_expr (struct c_spot_bindings *); 480 481extern void record_inline_static (location_t, tree, tree, 482 enum c_inline_static_type); 483extern void c_init_decl_processing (void); 484extern void c_print_identifier (FILE *, tree, int); 485extern int quals_from_declspecs (const struct c_declspecs *); 486extern struct c_declarator *build_array_declarator (location_t, tree, 487 struct c_declspecs *, 488 bool, bool); 489extern tree build_enumerator (location_t, location_t, struct c_enum_contents *, 490 tree, tree); 491extern tree check_for_loop_decls (location_t, bool); 492extern void mark_forward_parm_decls (void); 493extern void declare_parm_level (void); 494extern void undeclared_variable (location_t, tree); 495extern tree lookup_label_for_goto (location_t, tree); 496extern tree declare_label (tree); 497extern tree define_label (location_t, tree); 498extern struct c_spot_bindings *c_get_switch_bindings (void); 499extern void c_release_switch_bindings (struct c_spot_bindings *); 500extern bool c_check_switch_jump_warnings (struct c_spot_bindings *, 501 location_t, location_t); 502extern void finish_decl (tree, location_t, tree, tree, tree); 503extern tree finish_enum (tree, tree, tree); 504extern void finish_function (void); 505extern tree finish_struct (location_t, tree, tree, tree, 506 struct c_struct_parse_info *); 507extern struct c_arg_info *build_arg_info (void); 508extern struct c_arg_info *get_parm_info (bool, tree); 509extern tree grokfield (location_t, struct c_declarator *, 510 struct c_declspecs *, tree, tree *); 511extern tree groktypename (struct c_type_name *, tree *, bool *); 512extern tree grokparm (const struct c_parm *, tree *); 513extern tree implicitly_declare (location_t, tree); 514extern void keep_next_level (void); 515extern void pending_xref_error (void); 516extern void c_push_function_context (void); 517extern void c_pop_function_context (void); 518extern void push_parm_decl (const struct c_parm *, tree *); 519extern struct c_declarator *set_array_declarator_inner (struct c_declarator *, 520 struct c_declarator *); 521extern tree c_builtin_function (tree); 522extern tree c_builtin_function_ext_scope (tree); 523extern void shadow_tag (const struct c_declspecs *); 524extern void shadow_tag_warned (const struct c_declspecs *, int); 525extern tree start_enum (location_t, struct c_enum_contents *, tree); 526extern int start_function (struct c_declspecs *, struct c_declarator *, tree); 527extern tree start_decl (struct c_declarator *, struct c_declspecs *, bool, 528 tree); 529extern tree start_struct (location_t, enum tree_code, tree, 530 struct c_struct_parse_info **); 531extern void store_parm_decls (void); 532extern void store_parm_decls_from (struct c_arg_info *); 533extern void temp_store_parm_decls (tree, tree); 534extern void temp_pop_parm_decls (void); 535extern tree xref_tag (enum tree_code, tree); 536extern struct c_typespec parser_xref_tag (location_t, enum tree_code, tree); 537extern struct c_parm *build_c_parm (struct c_declspecs *, tree, 538 struct c_declarator *); 539extern struct c_declarator *build_attrs_declarator (tree, 540 struct c_declarator *); 541extern struct c_declarator *build_function_declarator (struct c_arg_info *, 542 struct c_declarator *); 543extern struct c_declarator *build_id_declarator (tree); 544extern struct c_declarator *make_pointer_declarator (struct c_declspecs *, 545 struct c_declarator *); 546extern struct c_declspecs *build_null_declspecs (void); 547extern struct c_declspecs *declspecs_add_qual (source_location, 548 struct c_declspecs *, tree); 549extern struct c_declspecs *declspecs_add_type (location_t, 550 struct c_declspecs *, 551 struct c_typespec); 552extern struct c_declspecs *declspecs_add_scspec (source_location, 553 struct c_declspecs *, tree); 554extern struct c_declspecs *declspecs_add_attrs (source_location, 555 struct c_declspecs *, tree); 556extern struct c_declspecs *declspecs_add_addrspace (source_location, 557 struct c_declspecs *, 558 addr_space_t); 559extern struct c_declspecs *declspecs_add_alignas (source_location, 560 struct c_declspecs *, tree); 561extern struct c_declspecs *finish_declspecs (struct c_declspecs *); 562 563/* in c-objc-common.c */ 564extern bool c_objc_common_init (void); 565extern bool c_missing_noreturn_ok_p (tree); 566extern bool c_warn_unused_global_decl (const_tree); 567extern void c_initialize_diagnostics (diagnostic_context *); 568extern bool c_vla_unspec_p (tree x, tree fn); 569 570/* in c-typeck.c */ 571extern int in_alignof; 572extern int in_sizeof; 573extern int in_typeof; 574 575extern tree c_last_sizeof_arg; 576 577extern struct c_switch *c_switch_stack; 578 579extern tree c_objc_common_truthvalue_conversion (location_t, tree); 580extern tree require_complete_type (tree); 581extern int same_translation_unit_p (const_tree, const_tree); 582extern int comptypes (tree, tree); 583extern int comptypes_check_different_types (tree, tree, bool *); 584extern bool c_vla_type_p (const_tree); 585extern bool c_mark_addressable (tree); 586extern void c_incomplete_type_error (const_tree, const_tree); 587extern tree c_type_promotes_to (tree); 588extern struct c_expr default_function_array_conversion (location_t, 589 struct c_expr); 590extern struct c_expr default_function_array_read_conversion (location_t, 591 struct c_expr); 592extern struct c_expr convert_lvalue_to_rvalue (location_t, struct c_expr, 593 bool, bool); 594extern void mark_exp_read (tree); 595extern tree composite_type (tree, tree); 596extern tree build_component_ref (location_t, tree, tree); 597extern tree build_array_ref (location_t, tree, tree); 598extern tree build_external_ref (location_t, tree, int, tree *); 599extern void pop_maybe_used (bool); 600extern struct c_expr c_expr_sizeof_expr (location_t, struct c_expr); 601extern struct c_expr c_expr_sizeof_type (location_t, struct c_type_name *); 602extern struct c_expr parser_build_unary_op (location_t, enum tree_code, 603 struct c_expr); 604extern struct c_expr parser_build_binary_op (location_t, 605 enum tree_code, struct c_expr, 606 struct c_expr); 607extern tree build_conditional_expr (location_t, tree, bool, tree, tree, 608 tree, tree); 609extern tree build_compound_expr (location_t, tree, tree); 610extern tree c_cast_expr (location_t, struct c_type_name *, tree); 611extern tree build_c_cast (location_t, tree, tree); 612extern void store_init_value (location_t, tree, tree, tree); 613extern void maybe_warn_string_init (location_t, tree, struct c_expr); 614extern void start_init (tree, tree, int); 615extern void finish_init (void); 616extern void really_start_incremental_init (tree); 617extern void finish_implicit_inits (location_t, struct obstack *); 618extern void push_init_level (location_t, int, struct obstack *); 619extern struct c_expr pop_init_level (location_t, int, struct obstack *); 620extern void set_init_index (location_t, tree, tree, struct obstack *); 621extern void set_init_label (location_t, tree, struct obstack *); 622extern void process_init_element (location_t, struct c_expr, bool, 623 struct obstack *); 624extern tree build_compound_literal (location_t, tree, tree, bool); 625extern void check_compound_literal_type (location_t, struct c_type_name *); 626extern tree c_start_case (location_t, location_t, tree, bool); 627extern void c_finish_case (tree, tree); 628extern tree build_asm_expr (location_t, tree, tree, tree, tree, tree, bool); 629extern tree build_asm_stmt (tree, tree); 630extern int c_types_compatible_p (tree, tree); 631extern tree c_begin_compound_stmt (bool); 632extern tree c_end_compound_stmt (location_t, tree, bool); 633extern void c_finish_if_stmt (location_t, tree, tree, tree, bool); 634extern void c_finish_loop (location_t, tree, tree, tree, tree, tree, bool); 635extern tree c_begin_stmt_expr (void); 636extern tree c_finish_stmt_expr (location_t, tree); 637extern tree c_process_expr_stmt (location_t, tree); 638extern tree c_finish_expr_stmt (location_t, tree); 639extern tree c_finish_return (location_t, tree, tree); 640extern tree c_finish_bc_stmt (location_t, tree *, bool); 641extern tree c_finish_goto_label (location_t, tree); 642extern tree c_finish_goto_ptr (location_t, tree); 643extern tree c_expr_to_decl (tree, bool *, bool *); 644extern tree c_finish_oacc_parallel (location_t, tree, tree); 645extern tree c_finish_oacc_kernels (location_t, tree, tree); 646extern tree c_finish_oacc_data (location_t, tree, tree); 647extern tree c_begin_omp_parallel (void); 648extern tree c_finish_omp_parallel (location_t, tree, tree); 649extern tree c_begin_omp_task (void); 650extern tree c_finish_omp_task (location_t, tree, tree); 651extern void c_finish_omp_cancel (location_t, tree); 652extern void c_finish_omp_cancellation_point (location_t, tree); 653extern tree c_finish_omp_clauses (tree); 654extern tree c_build_va_arg (location_t, tree, tree); 655extern tree c_finish_transaction (location_t, tree, int); 656extern bool c_tree_equal (tree, tree); 657extern tree c_build_function_call_vec (location_t, vec<location_t>, tree, 658 vec<tree, va_gc> *, vec<tree, va_gc> *); 659 660/* Set to 0 at beginning of a function definition, set to 1 if 661 a return statement that specifies a return value is seen. */ 662 663extern int current_function_returns_value; 664 665/* Set to 0 at beginning of a function definition, set to 1 if 666 a return statement with no argument is seen. */ 667 668extern int current_function_returns_null; 669 670/* Set to 0 at beginning of a function definition, set to 1 if 671 a call to a noreturn function is seen. */ 672 673extern int current_function_returns_abnormally; 674 675/* In c-decl.c */ 676 677/* Tell the binding oracle what kind of binding we are looking for. */ 678 679enum c_oracle_request 680{ 681 C_ORACLE_SYMBOL, 682 C_ORACLE_TAG, 683 C_ORACLE_LABEL 684}; 685 686/* If this is non-NULL, then it is a "binding oracle" which can lazily 687 create bindings when needed by the C compiler. The oracle is told 688 the name and type of the binding to create. It can call pushdecl 689 or the like to ensure the binding is visible; or do nothing, 690 leaving the binding untouched. c-decl.c takes note of when the 691 oracle has been called and will not call it again if it fails to 692 create a given binding. */ 693 694typedef void c_binding_oracle_function (enum c_oracle_request, tree identifier); 695 696extern c_binding_oracle_function *c_binding_oracle; 697 698extern void c_finish_incomplete_decl (tree); 699extern void c_write_global_declarations (void); 700extern tree c_omp_reduction_id (enum tree_code, tree); 701extern tree c_omp_reduction_decl (tree); 702extern tree c_omp_reduction_lookup (tree, tree); 703extern tree c_check_omp_declare_reduction_r (tree *, int *, void *); 704extern void c_pushtag (location_t, tree, tree); 705extern void c_bind (location_t, tree, bool); 706 707/* In c-errors.c */ 708extern void pedwarn_c90 (location_t, int opt, const char *, ...) 709 ATTRIBUTE_GCC_DIAG(3,4); 710extern bool pedwarn_c99 (location_t, int opt, const char *, ...) 711 ATTRIBUTE_GCC_DIAG(3,4); 712 713#endif /* ! GCC_C_TREE_H */ 714