1 /* Definitions for C parsing and type checking. 2 Copyright (C) 1987-2020 Free Software Foundation, Inc. 3 4 This file is part of GCC. 5 6 GCC is free software; you can redistribute it and/or modify it under 7 the terms of the GNU General Public License as published by the Free 8 Software Foundation; either version 3, or (at your option) any later 9 version. 10 11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 12 WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 for more details. 15 16 You should have received a copy of the GNU General Public License 17 along 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, UNION_TYPE or ENUMERAL_TYPE, a list of 42 variable declarations whose type would be completed by completing 43 that type. */ 44 #define C_TYPE_INCOMPLETE_VARS(TYPE) \ 45 TYPE_LANG_SLOT_1 (TREE_CHECK4 (TYPE, RECORD_TYPE, UNION_TYPE, \ 46 QUAL_UNION_TYPE, ENUMERAL_TYPE)) 47 48 /* In an IDENTIFIER_NODE, nonzero if this identifier is actually a 49 keyword. C_RID_CODE (node) is then the RID_* value of the keyword. */ 50 #define C_IS_RESERVED_WORD(ID) TREE_LANG_FLAG_0 (ID) 51 52 /* Record whether a type or decl was written with nonconstant size. 53 Note that TYPE_SIZE may have simplified to a constant. */ 54 #define C_TYPE_VARIABLE_SIZE(TYPE) TYPE_LANG_FLAG_1 (TYPE) 55 #define C_DECL_VARIABLE_SIZE(TYPE) DECL_LANG_FLAG_0 (TYPE) 56 57 /* Record whether a type is defined inside a struct or union type. 58 This is used for -Wc++-compat. */ 59 #define C_TYPE_DEFINED_IN_STRUCT(TYPE) TYPE_LANG_FLAG_2 (TYPE) 60 61 /* Record whether a typedef for type `int' was actually `signed int'. */ 62 #define C_TYPEDEF_EXPLICITLY_SIGNED(EXP) DECL_LANG_FLAG_1 (EXP) 63 64 /* For a FUNCTION_DECL, nonzero if it was defined without an explicit 65 return type. */ 66 #define C_FUNCTION_IMPLICIT_INT(EXP) DECL_LANG_FLAG_1 (EXP) 67 68 /* For a FUNCTION_DECL, nonzero if it was an implicit declaration. */ 69 #define C_DECL_IMPLICIT(EXP) DECL_LANG_FLAG_2 (EXP) 70 71 /* For a PARM_DECL, nonzero if it was declared as an array. */ 72 #define C_ARRAY_PARAMETER(NODE) DECL_LANG_FLAG_0 (NODE) 73 74 /* For FUNCTION_DECLs, evaluates true if the decl is built-in but has 75 been declared. */ 76 #define C_DECL_DECLARED_BUILTIN(EXP) \ 77 DECL_LANG_FLAG_3 (FUNCTION_DECL_CHECK (EXP)) 78 79 /* For FUNCTION_DECLs, evaluates true if the decl is built-in, has a 80 built-in prototype and does not have a non-built-in prototype. */ 81 #define C_DECL_BUILTIN_PROTOTYPE(EXP) \ 82 DECL_LANG_FLAG_6 (FUNCTION_DECL_CHECK (EXP)) 83 84 /* Record whether a decl was declared register. This is strictly a 85 front-end flag, whereas DECL_REGISTER is used for code generation; 86 they may differ for structures with volatile fields. */ 87 #define C_DECL_REGISTER(EXP) DECL_LANG_FLAG_4 (EXP) 88 89 /* Record whether a decl was used in an expression anywhere except an 90 unevaluated operand of sizeof / typeof / alignof. This is only 91 used for functions declared static but not defined, though outside 92 sizeof and typeof it is set for other function decls as well. */ 93 #define C_DECL_USED(EXP) DECL_LANG_FLAG_5 (FUNCTION_DECL_CHECK (EXP)) 94 95 /* Record whether a variable has been declared threadprivate by 96 #pragma omp threadprivate. */ 97 #define C_DECL_THREADPRIVATE_P(DECL) DECL_LANG_FLAG_3 (VAR_DECL_CHECK (DECL)) 98 99 /* Set on VAR_DECLs for compound literals. */ 100 #define C_DECL_COMPOUND_LITERAL_P(DECL) \ 101 DECL_LANG_FLAG_5 (VAR_DECL_CHECK (DECL)) 102 103 /* Nonzero for a decl which either doesn't exist or isn't a prototype. 104 N.B. Could be simplified if all built-in decls had complete prototypes 105 (but this is presently difficult because some of them need FILE*). */ 106 #define C_DECL_ISNT_PROTOTYPE(EXP) \ 107 (EXP == 0 \ 108 || (!prototype_p (TREE_TYPE (EXP)) \ 109 && !fndecl_built_in_p (EXP))) 110 111 /* For FUNCTION_TYPE, a hidden list of types of arguments. The same as 112 TYPE_ARG_TYPES for functions with prototypes, but created for functions 113 without prototypes. */ 114 #define TYPE_ACTUAL_ARG_TYPES(NODE) \ 115 TYPE_LANG_SLOT_1 (FUNCTION_TYPE_CHECK (NODE)) 116 117 /* For a CONSTRUCTOR, whether some initializer contains a 118 subexpression meaning it is not a constant expression. */ 119 #define CONSTRUCTOR_NON_CONST(EXPR) TREE_LANG_FLAG_1 (CONSTRUCTOR_CHECK (EXPR)) 120 121 /* For a SAVE_EXPR, nonzero if the operand of the SAVE_EXPR has already 122 been folded. */ 123 #define SAVE_EXPR_FOLDED_P(EXP) TREE_LANG_FLAG_1 (SAVE_EXPR_CHECK (EXP)) 124 125 /* Record parser information about an expression that is irrelevant 126 for code generation alongside a tree representing its value. */ 127 struct c_expr 128 { 129 /* The value of the expression. */ 130 tree value; 131 /* Record the original unary/binary operator of an expression, which may 132 have been changed by fold, STRING_CST for unparenthesized string 133 constants, C_MAYBE_CONST_EXPR for __builtin_constant_p calls 134 (even if parenthesized), for subexpressions, and for non-constant 135 initializers, or ERROR_MARK for other expressions (including 136 parenthesized expressions). */ 137 enum tree_code original_code; 138 /* If not NULL, the original type of an expression. This will 139 differ from the type of the value field for an enum constant. 140 The type of an enum constant is a plain integer type, but this 141 field will be the enum type. */ 142 tree original_type; 143 144 /* The source range of this expression. This is redundant 145 for node values that have locations, but not all node kinds 146 have locations (e.g. constants, and references to params, locals, 147 etc), so we stash a copy here. */ 148 source_range src_range; 149 150 /* Access to the first and last locations within the source spelling 151 of this expression. */ get_startc_expr152 location_t get_start () const { return src_range.m_start; } get_finishc_expr153 location_t get_finish () const { return src_range.m_finish; } 154 get_locationc_expr155 location_t get_location () const 156 { 157 if (EXPR_HAS_LOCATION (value)) 158 return EXPR_LOCATION (value); 159 else 160 return make_location (get_start (), get_start (), get_finish ()); 161 } 162 163 /* Set the value to error_mark_node whilst ensuring that src_range 164 is initialized. */ set_errorc_expr165 void set_error () 166 { 167 value = error_mark_node; 168 src_range.m_start = UNKNOWN_LOCATION; 169 src_range.m_finish = UNKNOWN_LOCATION; 170 } 171 }; 172 173 /* Type alias for struct c_expr. This allows to use the structure 174 inside the VEC types. */ 175 typedef struct c_expr c_expr_t; 176 177 /* A kind of type specifier. Note that this information is currently 178 only used to distinguish tag definitions, tag references and typeof 179 uses. */ 180 enum c_typespec_kind { 181 /* No typespec. This appears only in struct c_declspec. */ 182 ctsk_none, 183 /* A reserved keyword type specifier. */ 184 ctsk_resword, 185 /* A reference to a tag, previously declared, such as "struct foo". 186 This includes where the previous declaration was as a different 187 kind of tag, in which case this is only valid if shadowing that 188 tag in an inner scope. */ 189 ctsk_tagref, 190 /* Likewise, with standard attributes present in the reference. */ 191 ctsk_tagref_attrs, 192 /* A reference to a tag, not previously declared in a visible 193 scope. */ 194 ctsk_tagfirstref, 195 /* Likewise, with standard attributes present in the reference. */ 196 ctsk_tagfirstref_attrs, 197 /* A definition of a tag such as "struct foo { int a; }". */ 198 ctsk_tagdef, 199 /* A typedef name. */ 200 ctsk_typedef, 201 /* An ObjC-specific kind of type specifier. */ 202 ctsk_objc, 203 /* A typeof specifier, or _Atomic ( type-name ). */ 204 ctsk_typeof 205 }; 206 207 /* A type specifier: this structure is created in the parser and 208 passed to declspecs_add_type only. */ 209 struct c_typespec { 210 /* What kind of type specifier this is. */ 211 enum c_typespec_kind kind; 212 /* Whether the expression has operands suitable for use in constant 213 expressions. */ 214 bool expr_const_operands; 215 /* The specifier itself. */ 216 tree spec; 217 /* An expression to be evaluated before the type specifier, in the 218 case of typeof specifiers, or NULL otherwise or if no such 219 expression is required for a particular typeof specifier. In 220 particular, when typeof is applied to an expression of variably 221 modified type, that expression must be evaluated in order to 222 determine array sizes that form part of the type, but the 223 expression itself (as opposed to the array sizes) forms no part 224 of the type and so needs to be recorded separately. */ 225 tree expr; 226 }; 227 228 /* A storage class specifier. */ 229 enum c_storage_class { 230 csc_none, 231 csc_auto, 232 csc_extern, 233 csc_register, 234 csc_static, 235 csc_typedef 236 }; 237 238 /* A type specifier keyword "void", "_Bool", "char", "int", "float", 239 "double", "_Decimal32", "_Decimal64", "_Decimal128", "_Fract", "_Accum", 240 or none of these. */ 241 enum c_typespec_keyword { 242 cts_none, 243 cts_void, 244 cts_bool, 245 cts_char, 246 cts_int, 247 cts_float, 248 cts_int_n, 249 cts_double, 250 cts_dfloat32, 251 cts_dfloat64, 252 cts_dfloat128, 253 cts_floatn_nx, 254 cts_fract, 255 cts_accum, 256 cts_auto_type 257 }; 258 259 /* This enum lists all the possible declarator specifiers, storage 260 class or attribute that a user can write. There is at least one 261 enumerator per possible declarator specifier in the struct 262 c_declspecs below. 263 264 It is used to index the array of declspec locations in struct 265 c_declspecs. */ 266 enum c_declspec_word { 267 cdw_typespec /* A catch-all for a typespec. */, 268 cdw_storage_class /* A catch-all for a storage class */, 269 cdw_attributes, 270 cdw_typedef, 271 cdw_explicit_signed, 272 cdw_deprecated, 273 cdw_default_int, 274 cdw_long, 275 cdw_long_long, 276 cdw_short, 277 cdw_signed, 278 cdw_unsigned, 279 cdw_complex, 280 cdw_inline, 281 cdw_noreturn, 282 cdw_thread, 283 cdw_const, 284 cdw_volatile, 285 cdw_restrict, 286 cdw_atomic, 287 cdw_saturating, 288 cdw_alignas, 289 cdw_address_space, 290 cdw_gimple, 291 cdw_rtl, 292 cdw_number_of_elements /* This one must always be the last 293 enumerator. */ 294 }; 295 296 enum c_declspec_il { 297 cdil_none, 298 cdil_gimple, /* __GIMPLE */ 299 cdil_gimple_cfg, /* __GIMPLE(cfg) */ 300 cdil_gimple_ssa, /* __GIMPLE(ssa) */ 301 cdil_rtl /* __RTL */ 302 }; 303 304 /* A sequence of declaration specifiers in C. When a new declaration 305 specifier is added, please update the enum c_declspec_word above 306 accordingly. */ 307 struct c_declspecs { 308 location_t locations[cdw_number_of_elements]; 309 /* The type specified, if a single type specifier such as a struct, 310 union or enum specifier, typedef name or typeof specifies the 311 whole type, or NULL_TREE if none or a keyword such as "void" or 312 "char" is used. Does not include qualifiers. */ 313 tree type; 314 /* Any expression to be evaluated before the type, from a typeof 315 specifier. */ 316 tree expr; 317 /* The attributes from a typedef decl. */ 318 tree decl_attr; 319 /* When parsing, the GNU attributes and prefix standard attributes. 320 Outside the parser, this will be NULL; attributes (possibly from 321 multiple lists) will be passed separately. */ 322 tree attrs; 323 /* When parsing, postfix standard attributes (which appertain to the 324 type specified by the preceding declaration specifiers, unlike 325 prefix standard attributes which appertain to the declaration or 326 declarations as a whole). */ 327 tree postfix_attrs; 328 /* The pass to start compiling a __GIMPLE or __RTL function with. */ 329 char *gimple_or_rtl_pass; 330 /* ENTRY BB count. */ 331 profile_count entry_bb_count; 332 /* The base-2 log of the greatest alignment required by an _Alignas 333 specifier, in bytes, or -1 if no such specifiers with nonzero 334 alignment. */ 335 int align_log; 336 /* For the __intN declspec, this stores the index into the int_n_* arrays. */ 337 int int_n_idx; 338 /* For the _FloatN and _FloatNx declspec, this stores the index into 339 the floatn_nx_types array. */ 340 int floatn_nx_idx; 341 /* The storage class specifier, or csc_none if none. */ 342 enum c_storage_class storage_class; 343 /* Any type specifier keyword used such as "int", not reflecting 344 modifiers such as "short", or cts_none if none. */ 345 ENUM_BITFIELD (c_typespec_keyword) typespec_word : 8; 346 /* The kind of type specifier if one has been seen, ctsk_none 347 otherwise. */ 348 ENUM_BITFIELD (c_typespec_kind) typespec_kind : 4; 349 ENUM_BITFIELD (c_declspec_il) declspec_il : 3; 350 /* Whether any expressions in typeof specifiers may appear in 351 constant expressions. */ 352 BOOL_BITFIELD expr_const_operands : 1; 353 /* Whether any declaration specifiers have been seen at all. */ 354 BOOL_BITFIELD declspecs_seen_p : 1; 355 /* Whether any declaration specifiers other than standard attributes 356 have been seen at all. If only standard attributes have been 357 seen, this is an attribute-declaration. */ 358 BOOL_BITFIELD non_std_attrs_seen_p : 1; 359 /* Whether something other than a storage class specifier or 360 attribute has been seen. This is used to warn for the 361 obsolescent usage of storage class specifiers other than at the 362 start of the list. (Doing this properly would require function 363 specifiers to be handled separately from storage class 364 specifiers.) */ 365 BOOL_BITFIELD non_sc_seen_p : 1; 366 /* Whether the type is specified by a typedef or typeof name. */ 367 BOOL_BITFIELD typedef_p : 1; 368 /* Whether the type is explicitly "signed" or specified by a typedef 369 whose type is explicitly "signed". */ 370 BOOL_BITFIELD explicit_signed_p : 1; 371 /* Whether the specifiers include a deprecated typedef. */ 372 BOOL_BITFIELD deprecated_p : 1; 373 /* Whether the type defaulted to "int" because there were no type 374 specifiers. */ 375 BOOL_BITFIELD default_int_p : 1; 376 /* Whether "long" was specified. */ 377 BOOL_BITFIELD long_p : 1; 378 /* Whether "long" was specified more than once. */ 379 BOOL_BITFIELD long_long_p : 1; 380 /* Whether "short" was specified. */ 381 BOOL_BITFIELD short_p : 1; 382 /* Whether "signed" was specified. */ 383 BOOL_BITFIELD signed_p : 1; 384 /* Whether "unsigned" was specified. */ 385 BOOL_BITFIELD unsigned_p : 1; 386 /* Whether "complex" was specified. */ 387 BOOL_BITFIELD complex_p : 1; 388 /* Whether "inline" was specified. */ 389 BOOL_BITFIELD inline_p : 1; 390 /* Whether "_Noreturn" was speciied. */ 391 BOOL_BITFIELD noreturn_p : 1; 392 /* Whether "__thread" or "_Thread_local" was specified. */ 393 BOOL_BITFIELD thread_p : 1; 394 /* Whether "__thread" rather than "_Thread_local" was specified. */ 395 BOOL_BITFIELD thread_gnu_p : 1; 396 /* Whether "const" was specified. */ 397 BOOL_BITFIELD const_p : 1; 398 /* Whether "volatile" was specified. */ 399 BOOL_BITFIELD volatile_p : 1; 400 /* Whether "restrict" was specified. */ 401 BOOL_BITFIELD restrict_p : 1; 402 /* Whether "_Atomic" was specified. */ 403 BOOL_BITFIELD atomic_p : 1; 404 /* Whether "_Sat" was specified. */ 405 BOOL_BITFIELD saturating_p : 1; 406 /* Whether any alignment specifier (even with zero alignment) was 407 specified. */ 408 BOOL_BITFIELD alignas_p : 1; 409 /* The address space that the declaration belongs to. */ 410 addr_space_t address_space; 411 }; 412 413 /* The various kinds of declarators in C. */ 414 enum c_declarator_kind { 415 /* An identifier. */ 416 cdk_id, 417 /* A function. */ 418 cdk_function, 419 /* An array. */ 420 cdk_array, 421 /* A pointer. */ 422 cdk_pointer, 423 /* Parenthesized declarator with nested attributes. */ 424 cdk_attrs 425 }; 426 427 struct c_arg_tag { 428 /* The argument name. */ 429 tree id; 430 /* The type of the argument. */ 431 tree type; 432 }; 433 434 435 /* Information about the parameters in a function declarator. */ 436 struct c_arg_info { 437 /* A list of parameter decls. */ 438 tree parms; 439 /* A list of structure, union and enum tags defined. */ 440 vec<c_arg_tag, va_gc> *tags; 441 /* A list of argument types to go in the FUNCTION_TYPE. */ 442 tree types; 443 /* A list of non-parameter decls (notably enumeration constants) 444 defined with the parameters. */ 445 tree others; 446 /* A compound expression of VLA sizes from the parameters, or NULL. 447 In a function definition, these are used to ensure that 448 side-effects in sizes of arrays converted to pointers (such as a 449 parameter int i[n++]) take place; otherwise, they are 450 ignored. */ 451 tree pending_sizes; 452 /* True when these arguments had [*]. */ 453 BOOL_BITFIELD had_vla_unspec : 1; 454 }; 455 456 /* A declarator. */ 457 struct c_declarator { 458 /* The kind of declarator. */ 459 enum c_declarator_kind kind; 460 location_t id_loc; /* Currently only set for cdk_id, cdk_array. */ 461 /* Except for cdk_id, the contained declarator. For cdk_id, NULL. */ 462 struct c_declarator *declarator; 463 union { 464 /* For identifiers. */ 465 struct { 466 /* An IDENTIFIER_NODE, or NULL_TREE if an abstract 467 declarator. */ 468 tree id; 469 /* Any attributes (which apply to the declaration rather than to 470 the type described by the outer declarators). */ 471 tree attrs; 472 } id; 473 /* For functions. */ 474 struct c_arg_info *arg_info; 475 /* For arrays. */ 476 struct { 477 /* The array dimension, or NULL for [] and [*]. */ 478 tree dimen; 479 /* The qualifiers inside []. */ 480 int quals; 481 /* The attributes (currently ignored) inside []. */ 482 tree attrs; 483 /* Whether [static] was used. */ 484 BOOL_BITFIELD static_p : 1; 485 /* Whether [*] was used. */ 486 BOOL_BITFIELD vla_unspec_p : 1; 487 } array; 488 /* For pointers, the qualifiers on the pointer type. */ 489 int pointer_quals; 490 /* For attributes. */ 491 tree attrs; 492 } u; 493 }; 494 495 /* A type name. */ 496 struct c_type_name { 497 /* The declaration specifiers. */ 498 struct c_declspecs *specs; 499 /* The declarator. */ 500 struct c_declarator *declarator; 501 }; 502 503 /* A parameter. */ 504 struct c_parm { 505 /* The declaration specifiers, minus any prefix attributes. */ 506 struct c_declspecs *specs; 507 /* The attributes. */ 508 tree attrs; 509 /* The declarator. */ 510 struct c_declarator *declarator; 511 /* The location of the parameter. */ 512 location_t loc; 513 }; 514 515 /* Used when parsing an enum. Initialized by start_enum. */ 516 struct c_enum_contents 517 { 518 /* While defining an enum type, this is 1 plus the last enumerator 519 constant value. */ 520 tree enum_next_value; 521 522 /* Nonzero means that there was overflow computing enum_next_value. */ 523 int enum_overflow; 524 }; 525 526 /* A type of reference to a static identifier in an inline 527 function. */ 528 enum c_inline_static_type { 529 /* Identifier with internal linkage used in function that may be an 530 inline definition (i.e., file-scope static). */ 531 csi_internal, 532 /* Modifiable object with static storage duration defined in 533 function that may be an inline definition (i.e., local 534 static). */ 535 csi_modifiable 536 }; 537 538 539 /* in c-parser.c */ 540 extern void c_parse_init (void); 541 extern bool c_keyword_starts_typename (enum rid keyword); 542 543 /* in c-aux-info.c */ 544 extern void gen_aux_info_record (tree, int, int, int); 545 546 /* in c-decl.c */ 547 struct c_spot_bindings; 548 class c_struct_parse_info; 549 extern struct obstack parser_obstack; 550 extern tree c_break_label; 551 extern tree c_cont_label; 552 553 extern bool global_bindings_p (void); 554 extern tree pushdecl (tree); 555 extern void push_scope (void); 556 extern tree pop_scope (void); 557 extern void c_bindings_start_stmt_expr (struct c_spot_bindings *); 558 extern void c_bindings_end_stmt_expr (struct c_spot_bindings *); 559 560 extern void record_inline_static (location_t, tree, tree, 561 enum c_inline_static_type); 562 extern void c_init_decl_processing (void); 563 extern void c_print_identifier (FILE *, tree, int); 564 extern int quals_from_declspecs (const struct c_declspecs *); 565 extern struct c_declarator *build_array_declarator (location_t, tree, 566 struct c_declspecs *, 567 bool, bool); 568 extern tree build_enumerator (location_t, location_t, struct c_enum_contents *, 569 tree, tree); 570 extern tree check_for_loop_decls (location_t, bool); 571 extern void mark_forward_parm_decls (void); 572 extern void declare_parm_level (void); 573 extern void undeclared_variable (location_t, tree); 574 extern tree lookup_label_for_goto (location_t, tree); 575 extern tree declare_label (tree); 576 extern tree define_label (location_t, tree); 577 extern struct c_spot_bindings *c_get_switch_bindings (void); 578 extern void c_release_switch_bindings (struct c_spot_bindings *); 579 extern bool c_check_switch_jump_warnings (struct c_spot_bindings *, 580 location_t, location_t); 581 extern void finish_decl (tree, location_t, tree, tree, tree); 582 extern tree finish_enum (tree, tree, tree); 583 extern void finish_function (location_t = input_location); 584 extern tree finish_struct (location_t, tree, tree, tree, 585 class c_struct_parse_info *); 586 extern tree c_simulate_enum_decl (location_t, const char *, 587 vec<string_int_pair>); 588 extern struct c_arg_info *build_arg_info (void); 589 extern struct c_arg_info *get_parm_info (bool, tree); 590 extern tree grokfield (location_t, struct c_declarator *, 591 struct c_declspecs *, tree, tree *); 592 extern tree groktypename (struct c_type_name *, tree *, bool *); 593 extern tree grokparm (const struct c_parm *, tree *); 594 extern tree implicitly_declare (location_t, tree); 595 extern void keep_next_level (void); 596 extern void pending_xref_error (void); 597 extern void c_push_function_context (void); 598 extern void c_pop_function_context (void); 599 extern void push_parm_decl (const struct c_parm *, tree *); 600 extern struct c_declarator *set_array_declarator_inner (struct c_declarator *, 601 struct c_declarator *); 602 extern tree c_builtin_function (tree); 603 extern tree c_builtin_function_ext_scope (tree); 604 extern tree c_simulate_builtin_function_decl (tree); 605 extern void c_warn_unused_attributes (tree); 606 extern tree c_warn_type_attributes (tree); 607 extern void shadow_tag (const struct c_declspecs *); 608 extern void shadow_tag_warned (const struct c_declspecs *, int); 609 extern tree start_enum (location_t, struct c_enum_contents *, tree); 610 extern bool start_function (struct c_declspecs *, struct c_declarator *, tree); 611 extern tree start_decl (struct c_declarator *, struct c_declspecs *, bool, 612 tree); 613 extern tree start_struct (location_t, enum tree_code, tree, 614 class c_struct_parse_info **); 615 extern void store_parm_decls (void); 616 extern void store_parm_decls_from (struct c_arg_info *); 617 extern void temp_store_parm_decls (tree, tree); 618 extern void temp_pop_parm_decls (void); 619 extern tree xref_tag (enum tree_code, tree); 620 extern struct c_typespec parser_xref_tag (location_t, enum tree_code, tree, 621 bool, tree); 622 extern struct c_parm *build_c_parm (struct c_declspecs *, tree, 623 struct c_declarator *, location_t); 624 extern struct c_declarator *build_attrs_declarator (tree, 625 struct c_declarator *); 626 extern struct c_declarator *build_function_declarator (struct c_arg_info *, 627 struct c_declarator *); 628 extern struct c_declarator *build_id_declarator (tree); 629 extern struct c_declarator *make_pointer_declarator (struct c_declspecs *, 630 struct c_declarator *); 631 extern struct c_declspecs *build_null_declspecs (void); 632 extern struct c_declspecs *declspecs_add_qual (location_t, 633 struct c_declspecs *, tree); 634 extern struct c_declspecs *declspecs_add_type (location_t, 635 struct c_declspecs *, 636 struct c_typespec); 637 extern struct c_declspecs *declspecs_add_scspec (location_t, 638 struct c_declspecs *, tree); 639 extern struct c_declspecs *declspecs_add_attrs (location_t, 640 struct c_declspecs *, tree); 641 extern struct c_declspecs *declspecs_add_addrspace (location_t, 642 struct c_declspecs *, 643 addr_space_t); 644 extern struct c_declspecs *declspecs_add_alignas (location_t, 645 struct c_declspecs *, tree); 646 extern struct c_declspecs *finish_declspecs (struct c_declspecs *); 647 648 /* in c-objc-common.c */ 649 extern bool c_objc_common_init (void); 650 extern bool c_missing_noreturn_ok_p (tree); 651 extern bool c_warn_unused_global_decl (const_tree); 652 extern void c_initialize_diagnostics (diagnostic_context *); 653 extern bool c_vla_unspec_p (tree x, tree fn); 654 extern alias_set_type c_get_alias_set (tree); 655 656 /* in c-typeck.c */ 657 extern int in_alignof; 658 extern int in_sizeof; 659 extern int in_typeof; 660 661 extern tree c_last_sizeof_arg; 662 extern location_t c_last_sizeof_loc; 663 664 extern struct c_switch *c_switch_stack; 665 666 extern tree c_objc_common_truthvalue_conversion (location_t, tree); 667 extern tree require_complete_type (location_t, tree); 668 extern bool same_translation_unit_p (const_tree, const_tree); 669 extern int comptypes (tree, tree); 670 extern int comptypes_check_different_types (tree, tree, bool *); 671 extern bool c_vla_type_p (const_tree); 672 extern bool c_mark_addressable (tree, bool = false); 673 extern void c_incomplete_type_error (location_t, const_tree, const_tree); 674 extern tree c_type_promotes_to (tree); 675 extern struct c_expr default_function_array_conversion (location_t, 676 struct c_expr); 677 extern struct c_expr default_function_array_read_conversion (location_t, 678 struct c_expr); 679 extern struct c_expr convert_lvalue_to_rvalue (location_t, struct c_expr, 680 bool, bool); 681 extern tree decl_constant_value_1 (tree, bool); 682 extern void mark_exp_read (tree); 683 extern tree composite_type (tree, tree); 684 extern tree build_component_ref (location_t, tree, tree, location_t); 685 extern tree build_array_ref (location_t, tree, tree); 686 extern tree build_external_ref (location_t, tree, bool, tree *); 687 extern void pop_maybe_used (bool); 688 extern struct c_expr c_expr_sizeof_expr (location_t, struct c_expr); 689 extern struct c_expr c_expr_sizeof_type (location_t, struct c_type_name *); 690 extern struct c_expr parser_build_unary_op (location_t, enum tree_code, 691 struct c_expr); 692 extern struct c_expr parser_build_binary_op (location_t, 693 enum tree_code, struct c_expr, 694 struct c_expr); 695 extern tree build_conditional_expr (location_t, tree, bool, tree, tree, 696 location_t, tree, tree, location_t); 697 extern tree build_compound_expr (location_t, tree, tree); 698 extern tree c_cast_expr (location_t, struct c_type_name *, tree); 699 extern tree build_c_cast (location_t, tree, tree); 700 extern void store_init_value (location_t, tree, tree, tree); 701 extern void maybe_warn_string_init (location_t, tree, struct c_expr); 702 extern void start_init (tree, tree, int, rich_location *); 703 extern void finish_init (void); 704 extern void really_start_incremental_init (tree); 705 extern void finish_implicit_inits (location_t, struct obstack *); 706 extern void push_init_level (location_t, int, struct obstack *); 707 extern struct c_expr pop_init_level (location_t, int, struct obstack *, 708 location_t); 709 extern void set_init_index (location_t, tree, tree, struct obstack *); 710 extern void set_init_label (location_t, tree, location_t, struct obstack *); 711 extern void process_init_element (location_t, struct c_expr, bool, 712 struct obstack *); 713 extern tree build_compound_literal (location_t, tree, tree, bool, 714 unsigned int); 715 extern void check_compound_literal_type (location_t, struct c_type_name *); 716 extern tree c_start_case (location_t, location_t, tree, bool); 717 extern void c_finish_case (tree, tree); 718 extern tree build_asm_expr (location_t, tree, tree, tree, tree, tree, bool, 719 bool); 720 extern tree build_asm_stmt (bool, tree); 721 extern int c_types_compatible_p (tree, tree); 722 extern tree c_begin_compound_stmt (bool); 723 extern tree c_end_compound_stmt (location_t, tree, bool); 724 extern void c_finish_if_stmt (location_t, tree, tree, tree); 725 extern void c_finish_loop (location_t, location_t, tree, location_t, tree, 726 tree, tree, tree, bool); 727 extern tree c_begin_stmt_expr (void); 728 extern tree c_finish_stmt_expr (location_t, tree); 729 extern tree c_process_expr_stmt (location_t, tree); 730 extern tree c_finish_expr_stmt (location_t, tree); 731 extern tree c_finish_return (location_t, tree, tree); 732 extern tree c_finish_bc_stmt (location_t, tree *, bool); 733 extern tree c_finish_goto_label (location_t, tree); 734 extern tree c_finish_goto_ptr (location_t, tree); 735 extern tree c_expr_to_decl (tree, bool *, bool *); 736 extern tree c_finish_omp_construct (location_t, enum tree_code, tree, tree); 737 extern tree c_finish_oacc_data (location_t, tree, tree); 738 extern tree c_finish_oacc_host_data (location_t, tree, tree); 739 extern tree c_begin_omp_parallel (void); 740 extern tree c_finish_omp_parallel (location_t, tree, tree); 741 extern tree c_begin_omp_task (void); 742 extern tree c_finish_omp_task (location_t, tree, tree); 743 extern void c_finish_omp_cancel (location_t, tree); 744 extern void c_finish_omp_cancellation_point (location_t, tree); 745 extern tree c_finish_omp_clauses (tree, enum c_omp_region_type); 746 extern tree c_build_va_arg (location_t, tree, location_t, tree); 747 extern tree c_finish_transaction (location_t, tree, int); 748 extern bool c_tree_equal (tree, tree); 749 extern tree c_build_function_call_vec (location_t, vec<location_t>, tree, 750 vec<tree, va_gc> *, vec<tree, va_gc> *); 751 extern tree c_omp_clause_copy_ctor (tree, tree, tree); 752 753 /* Set to 0 at beginning of a function definition, set to 1 if 754 a return statement that specifies a return value is seen. */ 755 756 extern int current_function_returns_value; 757 758 /* Set to 0 at beginning of a function definition, set to 1 if 759 a return statement with no argument is seen. */ 760 761 extern int current_function_returns_null; 762 763 /* Set to 0 at beginning of a function definition, set to 1 if 764 a call to a noreturn function is seen. */ 765 766 extern int current_function_returns_abnormally; 767 768 /* In c-decl.c */ 769 770 /* Tell the binding oracle what kind of binding we are looking for. */ 771 772 enum c_oracle_request 773 { 774 C_ORACLE_SYMBOL, 775 C_ORACLE_TAG, 776 C_ORACLE_LABEL 777 }; 778 779 /* If this is non-NULL, then it is a "binding oracle" which can lazily 780 create bindings when needed by the C compiler. The oracle is told 781 the name and type of the binding to create. It can call pushdecl 782 or the like to ensure the binding is visible; or do nothing, 783 leaving the binding untouched. c-decl.c takes note of when the 784 oracle has been called and will not call it again if it fails to 785 create a given binding. */ 786 787 typedef void c_binding_oracle_function (enum c_oracle_request, tree identifier); 788 789 extern c_binding_oracle_function *c_binding_oracle; 790 791 extern void c_finish_incomplete_decl (tree); 792 extern tree c_omp_reduction_id (enum tree_code, tree); 793 extern tree c_omp_reduction_decl (tree); 794 extern tree c_omp_reduction_lookup (tree, tree); 795 extern tree c_check_omp_declare_reduction_r (tree *, int *, void *); 796 extern bool c_check_in_current_scope (tree); 797 extern void c_pushtag (location_t, tree, tree); 798 extern void c_bind (location_t, tree, bool); 799 extern bool tag_exists_p (enum tree_code, tree); 800 801 /* In c-errors.c */ 802 extern bool pedwarn_c90 (location_t, int opt, const char *, ...) 803 ATTRIBUTE_GCC_DIAG(3,4); 804 extern bool pedwarn_c99 (location_t, int opt, const char *, ...) 805 ATTRIBUTE_GCC_DIAG(3,4); 806 extern bool pedwarn_c11 (location_t, int opt, const char *, ...) 807 ATTRIBUTE_GCC_DIAG(3,4); 808 809 extern void 810 set_c_expr_source_range (c_expr *expr, 811 location_t start, location_t finish); 812 813 extern void 814 set_c_expr_source_range (c_expr *expr, 815 source_range src_range); 816 817 /* In c-fold.c */ 818 extern vec<tree> incomplete_record_decls; 819 820 #if CHECKING_P 821 namespace selftest { 822 extern void run_c_tests (void); 823 } // namespace selftest 824 #endif /* #if CHECKING_P */ 825 826 827 #endif /* ! GCC_C_TREE_H */ 828