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1.1 root 1: /* Definitions for C parsing and type checking. 1.1.1.6 ! root 2: Copyright (C) 1987, 1993, 1994 Free Software Foundation, Inc. 1.1 root 3: 4: This file is part of GNU CC. 5: 6: GNU CC is free software; you can redistribute it and/or modify 7: it under the terms of the GNU General Public License as published by 8: the Free Software Foundation; either version 2, or (at your option) 9: any later version. 10: 11: GNU CC is distributed in the hope that it will be useful, 12: but WITHOUT ANY WARRANTY; without even the implied warranty of 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14: GNU General Public License for more details. 15: 16: You should have received a copy of the GNU General Public License 17: along with GNU CC; see the file COPYING. If not, write to 18: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ 19: 1.1.1.4 root 20: #ifndef _C_TREE_H 21: #define _C_TREE_H 22: 1.1 root 23: /* Language-dependent contents of an identifier. */ 24: 1.1.1.3 root 25: /* The limbo_value is used for block level extern declarations, which need 26: to be type checked against subsequent extern declarations. They can't 27: be referenced after they fall out of scope, so they can't be global. */ 28: 1.1 root 29: struct lang_identifier 30: { 31: struct tree_identifier ignore; 32: tree global_value, local_value, label_value, implicit_decl; 1.1.1.3 root 33: tree error_locus, limbo_value; 1.1 root 34: }; 35: 36: /* Macros for access to language-specific slots in an identifier. */ 1.1.1.3 root 37: /* Each of these slots contains a DECL node or null. */ 1.1 root 38: 1.1.1.3 root 39: /* This represents the value which the identifier has in the 40: file-scope namespace. */ 1.1 root 41: #define IDENTIFIER_GLOBAL_VALUE(NODE) \ 42: (((struct lang_identifier *)(NODE))->global_value) 1.1.1.3 root 43: /* This represents the value which the identifier has in the current 44: scope. */ 1.1 root 45: #define IDENTIFIER_LOCAL_VALUE(NODE) \ 46: (((struct lang_identifier *)(NODE))->local_value) 1.1.1.3 root 47: /* This represents the value which the identifier has as a label in 48: the current label scope. */ 1.1 root 49: #define IDENTIFIER_LABEL_VALUE(NODE) \ 50: (((struct lang_identifier *)(NODE))->label_value) 1.1.1.3 root 51: /* This records the extern decl of this identifier, if it has had one 52: at any point in this compilation. */ 53: #define IDENTIFIER_LIMBO_VALUE(NODE) \ 54: (((struct lang_identifier *)(NODE))->limbo_value) 55: /* This records the implicit function decl of this identifier, if it 56: has had one at any point in this compilation. */ 1.1 root 57: #define IDENTIFIER_IMPLICIT_DECL(NODE) \ 58: (((struct lang_identifier *)(NODE))->implicit_decl) 1.1.1.3 root 59: /* This is the last function in which we printed an "undefined variable" 60: message for this identifier. Value is a FUNCTION_DECL or null. */ 1.1 root 61: #define IDENTIFIER_ERROR_LOCUS(NODE) \ 62: (((struct lang_identifier *)(NODE))->error_locus) 63: 64: /* In identifiers, C uses the following fields in a special way: 65: TREE_PUBLIC to record that there was a previous local extern decl. 66: TREE_USED to record that such a decl was used. 67: TREE_ADDRESSABLE to record that the address of such a decl was used. */ 68: 69: /* Nonzero means reject anything that ANSI standard C forbids. */ 70: extern int pedantic; 71: 72: /* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is read-only. */ 73: #define C_TYPE_FIELDS_READONLY(type) TREE_LANG_FLAG_1 (type) 74: 75: /* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is volatile. */ 76: #define C_TYPE_FIELDS_VOLATILE(type) TREE_LANG_FLAG_2 (type) 77: 78: /* In a RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE 79: nonzero if the definition of the type has already started. */ 80: #define C_TYPE_BEING_DEFINED(type) TYPE_LANG_FLAG_0 (type) 81: 82: /* In a RECORD_TYPE, a sorted array of the fields of the type. */ 83: struct lang_type 84: { 85: int len; 86: tree elts[1]; 87: }; 88: 89: /* Mark which labels are explicitly declared. 90: These may be shadowed, and may be referenced from nested functions. */ 91: #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label) 92: 93: /* Record whether a type or decl was written with nonconstant size. 94: Note that TYPE_SIZE may have simplified to a constant. */ 95: #define C_TYPE_VARIABLE_SIZE(type) TYPE_LANG_FLAG_1 (type) 96: #define C_DECL_VARIABLE_SIZE(type) DECL_LANG_FLAG_0 (type) 97: 98: /* Record in each node resulting from a binary operator 99: what operator was specified for it. */ 100: #define C_EXP_ORIGINAL_CODE(exp) ((enum tree_code) TREE_COMPLEXITY (exp)) 101: 102: #if 0 /* Not used. */ 103: /* Record whether a decl for a function or function pointer has 104: already been mentioned (in a warning) because it was called 105: but didn't have a prototype. */ 106: #define C_MISSING_PROTOTYPE_WARNED(decl) DECL_LANG_FLAG_2(decl) 107: #endif 108: 109: /* Store a value in that field. */ 110: #define C_SET_EXP_ORIGINAL_CODE(exp, code) \ 111: (TREE_COMPLEXITY (exp) = (int)(code)) 112: 113: /* Record whether a typedef for type `int' was actually `signed int'. */ 114: #define C_TYPEDEF_EXPLICITLY_SIGNED(exp) DECL_LANG_FLAG_1 ((exp)) 115: 1.1.1.3 root 116: /* Nonzero for a declaration of a built in function if there has been no 117: occasion that would declare the function in ordinary C. 118: Using the function draws a pedantic warning in this case. */ 119: #define C_DECL_ANTICIPATED(exp) DECL_LANG_FLAG_3 ((exp)) 120: 1.1 root 121: /* For FUNCTION_TYPE, a hidden list of types of arguments. The same as 122: TYPE_ARG_TYPES for functions with prototypes, but created for functions 123: without prototypes. */ 124: #define TYPE_ACTUAL_ARG_TYPES(NODE) TYPE_NONCOPIED_PARTS (NODE) 1.1.1.3 root 125: 126: /* Nonzero if the type T promotes to itself. 127: ANSI C states explicitly the list of types that promote; 128: in particular, short promotes to int even if they have the same width. */ 129: #define C_PROMOTING_INTEGER_TYPE_P(t) \ 130: (TREE_CODE ((t)) == INTEGER_TYPE \ 131: && (TYPE_MAIN_VARIANT (t) == char_type_node \ 132: || TYPE_MAIN_VARIANT (t) == signed_char_type_node \ 133: || TYPE_MAIN_VARIANT (t) == unsigned_char_type_node \ 134: || TYPE_MAIN_VARIANT (t) == short_integer_type_node \ 135: || TYPE_MAIN_VARIANT (t) == short_unsigned_type_node)) 1.1 root 136: 1.1.1.4 root 137: /* In a VAR_DECL, means the variable is really an iterator. */ 138: #define ITERATOR_P(D) (DECL_LANG_FLAG_4(D)) 1.1 root 139: 1.1.1.4 root 140: /* In a VAR_DECL for an iterator, means we are within 141: an explicit loop over that iterator. */ 142: #define ITERATOR_BOUND_P(NODE) ((NODE)->common.readonly_flag) 143: 144: /* in c-lang.c and objc-act.c */ 145: extern tree lookup_interface PROTO((tree)); 146: extern tree is_class_name PROTO((tree)); 147: extern void maybe_objc_check_decl PROTO((tree)); 148: extern int maybe_objc_comptypes PROTO((tree, tree, int)); 149: extern tree maybe_building_objc_message_expr PROTO((void)); 150: extern tree maybe_objc_method_name PROTO((tree)); 151: extern int recognize_objc_keyword PROTO((void)); 152: extern tree build_objc_string PROTO((int, char *)); 153: 154: /* in c-aux-info.c */ 155: extern void gen_aux_info_record PROTO((tree, int, int, int)); 1.1 root 156: 1.1.1.4 root 157: /* in c-common.c */ 1.1.1.5 root 158: extern void declare_function_name PROTO((void)); 159: extern void decl_attributes PROTO((tree, tree)); 160: extern void init_function_format_info PROTO((void)); 161: extern void record_function_format PROTO((tree, tree, int, int, int)); 162: extern void check_function_format PROTO((tree, tree, tree)); 1.1 root 163: /* Print an error message for invalid operands to arith operation CODE. 164: NOP_EXPR is used as a special case (see truthvalue_conversion). */ 1.1.1.4 root 165: extern void binary_op_error PROTO((enum tree_code)); 166: extern void c_expand_expr_stmt PROTO((tree)); 167: /* Validate the expression after `case' and apply default promotions. */ 168: extern tree check_case_value PROTO((tree)); 169: /* Concatenate a list of STRING_CST nodes into one STRING_CST. */ 170: extern tree combine_strings PROTO((tree)); 171: extern void constant_expression_warning PROTO((tree)); 172: extern tree convert_and_check PROTO((tree, tree)); 173: extern void overflow_warning PROTO((tree)); 174: extern void unsigned_conversion_warning PROTO((tree, tree)); 175: /* Read the rest of the current #-directive line. */ 176: extern char *get_directive_line STDIO_PROTO((FILE *)); 1.1 root 177: /* Subroutine of build_binary_op, used for comparison operations. 178: See if the operands have both been converted from subword integer types 179: and, if so, perhaps change them both back to their original type. */ 1.1.1.4 root 180: extern tree shorten_compare PROTO((tree *, tree *, tree *, enum tree_code *)); 1.1.1.3 root 181: /* Prepare expr to be an argument of a TRUTH_NOT_EXPR, 182: or validate its data type for an `if' or `while' statement or ?..: exp. */ 1.1.1.4 root 183: extern tree truthvalue_conversion PROTO((tree)); 184: extern tree type_for_mode PROTO((enum machine_mode, int)); 185: extern tree type_for_size PROTO((unsigned, int)); 1.1.1.3 root 186: 1.1.1.4 root 187: /* in c-convert.c */ 188: extern tree convert PROTO((tree, tree)); 1.1 root 189: 1.1.1.4 root 190: /* in c-decl.c */ 191: /* Standard named or nameless data types of the C compiler. */ 192: extern tree char_array_type_node; 193: extern tree char_type_node; 194: extern tree const_ptr_type_node; 195: extern tree const_string_type_node; 1.1 root 196: extern tree default_function_type; 1.1.1.4 root 197: extern tree double_ftype_double; 198: extern tree double_ftype_double_double; 199: extern tree double_type_node; 200: extern tree float_type_node; 201: extern tree intDI_type_node; 202: extern tree intHI_type_node; 203: extern tree intQI_type_node; 204: extern tree intSI_type_node; 205: extern tree int_array_type_node; 206: extern tree int_ftype_cptr_cptr_sizet; 207: extern tree int_ftype_int; 208: extern tree int_ftype_ptr_ptr_int; 209: extern tree int_ftype_string_string; 210: extern tree integer_type_node; 211: extern tree long_double_type_node; 212: extern tree long_ftype_long; 213: extern tree long_integer_type_node; 214: extern tree long_long_integer_type_node; 215: extern tree long_long_unsigned_type_node; 216: extern tree long_unsigned_type_node; 217: extern tree complex_integer_type_node; 218: extern tree complex_float_type_node; 219: extern tree complex_double_type_node; 220: extern tree complex_long_double_type_node; 221: extern tree ptr_type_node; 222: extern tree ptrdiff_type_node; 223: extern tree short_integer_type_node; 224: extern tree short_unsigned_type_node; 225: extern tree signed_char_type_node; 226: extern tree signed_wchar_type_node; 227: extern tree string_ftype_ptr_ptr; 228: extern tree string_type_node; 229: extern tree unsigned_char_type_node; 230: extern tree unsigned_intDI_type_node; 231: extern tree unsigned_intHI_type_node; 232: extern tree unsigned_intQI_type_node; 233: extern tree unsigned_intSI_type_node; 234: extern tree unsigned_type_node; 235: extern tree unsigned_wchar_type_node; 236: extern tree void_ftype_ptr_int_int; 237: extern tree void_ftype_ptr_ptr_int; 238: extern tree void_type_node; 239: extern tree wchar_array_type_node; 240: extern tree wchar_type_node; 241: 242: extern tree build_enumerator PROTO((tree, tree)); 243: /* Declare a predefined function. Return the declaration. */ 244: extern tree builtin_function PROTO((char *, tree, enum built_in_function function_, char *)); 245: /* Add qualifiers to a type, in the fashion for C. */ 246: extern tree c_build_type_variant PROTO((tree, int, int)); 247: extern int c_decode_option PROTO((char *)); 248: extern void c_mark_varargs PROTO((void)); 249: extern tree check_identifier PROTO((tree, tree)); 250: extern void clear_parm_order PROTO((void)); 251: extern tree combine_parm_decls PROTO((tree, tree, int)); 252: extern int complete_array_type PROTO((tree, tree, int)); 253: extern void declare_parm_level PROTO((int)); 254: extern tree define_label PROTO((char *, int, tree)); 255: extern void delete_block PROTO((tree)); 256: extern void finish_decl PROTO((tree, tree, tree)); 257: extern tree finish_enum PROTO((tree, tree)); 258: extern void finish_function PROTO((int)); 259: extern tree finish_struct PROTO((tree, tree)); 260: extern tree get_parm_info PROTO((int)); 261: extern tree getdecls PROTO((void)); 262: extern tree gettags PROTO((void)); 263: extern int global_bindings_p PROTO((void)); 264: extern tree grokfield PROTO((char *, int, tree, tree, tree)); 265: extern tree groktypename PROTO((tree)); 266: extern tree groktypename_in_parm_context PROTO((tree)); 267: extern tree implicitly_declare PROTO((tree)); 268: extern int in_parm_level_p PROTO((void)); 269: extern void init_decl_processing PROTO((void)); 270: extern void insert_block PROTO((tree)); 271: extern void keep_next_level PROTO((void)); 272: extern int kept_level_p PROTO((void)); 273: extern tree lookup_label PROTO((tree)); 274: extern tree lookup_name PROTO((tree)); 275: extern tree lookup_name_current_level PROTO((tree)); 1.1.1.6 ! root 276: extern tree lookup_name_current_level_global PROTO((tree)); 1.1.1.4 root 277: extern tree maybe_build_cleanup PROTO((tree)); 278: extern void parmlist_tags_warning PROTO((void)); 279: extern void pending_xref_error PROTO((void)); 280: extern void pop_c_function_context PROTO((void)); 281: extern void pop_label_level PROTO((void)); 282: extern tree poplevel PROTO((int, int, int)); 1.1.1.5 root 283: extern void print_lang_decl STDIO_PROTO((FILE *, tree, 284: int)); 1.1.1.4 root 285: extern void print_lang_identifier STDIO_PROTO((FILE *, tree, 286: int)); 1.1.1.5 root 287: extern void print_lang_type STDIO_PROTO((FILE *, tree, 288: int)); 1.1.1.4 root 289: extern void push_c_function_context PROTO((void)); 290: extern void push_label_level PROTO((void)); 291: extern void push_parm_decl PROTO((tree)); 292: extern tree pushdecl PROTO((tree)); 293: extern tree pushdecl_top_level PROTO((tree)); 294: extern void pushlevel PROTO((int)); 295: extern void pushtag PROTO((tree, tree)); 296: extern void set_block PROTO((tree)); 297: extern tree shadow_label PROTO((tree)); 298: extern void shadow_record_fields PROTO((tree)); 299: extern void shadow_tag PROTO((tree)); 300: extern void shadow_tag_warned PROTO((tree, int)); 301: extern tree start_enum PROTO((tree)); 302: extern int start_function PROTO((tree, tree, int)); 303: extern tree start_decl PROTO((tree, tree, int)); 304: extern tree start_struct PROTO((enum tree_code, tree)); 305: extern void store_parm_decls PROTO((void)); 306: extern tree xref_tag PROTO((enum tree_code, tree)); 307: 308: /* in c-typeck.c */ 1.1.1.6 ! root 309: extern tree require_complete_type PROTO((tree)); ! 310: extern void incomplete_type_error PROTO((tree, tree)); 1.1.1.4 root 311: /* Given two integer or real types, return the type for their sum. 312: Given two compatible ANSI C types, returns the merged type. */ 313: extern tree common_type PROTO((tree, tree)); 1.1.1.6 ! root 314: extern int comptypes PROTO((tree, tree)); ! 315: extern int self_promoting_args_p PROTO((tree)); ! 316: extern tree c_sizeof PROTO((tree)); ! 317: extern tree c_sizeof_nowarn PROTO((tree)); ! 318: extern tree c_size_in_bytes PROTO((tree)); ! 319: extern tree c_alignof PROTO((tree)); ! 320: extern tree c_alignof_expr PROTO((tree)); 1.1.1.4 root 321: extern tree default_conversion PROTO((tree)); 1.1.1.6 ! root 322: extern tree build_component_ref PROTO((tree, tree)); ! 323: extern tree build_indirect_ref PROTO((tree, char *)); ! 324: extern tree build_array_ref PROTO((tree, tree)); ! 325: extern tree build_function_call PROTO((tree, tree)); ! 326: extern tree parser_build_binary_op PROTO((enum tree_code, ! 327: tree, tree)); ! 328: extern tree build_binary_op PROTO((enum tree_code, ! 329: tree, tree, int)); ! 330: extern tree build_unary_op PROTO((enum tree_code, ! 331: tree, int)); ! 332: extern int lvalue_p PROTO((tree)); ! 333: extern int lvalue_or_else PROTO((tree, char *)); ! 334: extern void readonly_warning PROTO((tree, char *)); ! 335: extern int mark_addressable PROTO((tree)); ! 336: extern tree build_conditional_expr PROTO((tree, tree, tree)); ! 337: extern tree build_compound_expr PROTO((tree)); ! 338: extern tree build_c_cast PROTO((tree, tree)); ! 339: extern tree build_modify_expr PROTO((tree, enum tree_code, ! 340: tree)); ! 341: extern tree initializer_constant_valid_p PROTO((tree, tree)); 1.1.1.4 root 342: extern void store_init_value PROTO((tree, tree)); 1.1.1.6 ! root 343: extern void error_init PROTO((char *, char *, ! 344: char *)); ! 345: extern void pedwarn_init PROTO((char *, char *, ! 346: char *)); 1.1.1.5 root 347: extern void start_init PROTO((tree, tree, int)); 348: extern void finish_init PROTO((void)); 349: extern void really_start_incremental_init PROTO((tree)); 350: extern void push_init_level PROTO((int)); 351: extern tree pop_init_level PROTO((int)); 352: extern void set_init_index PROTO((tree, tree)); 353: extern void set_init_label PROTO((tree)); 354: extern void process_init_element PROTO((tree)); 1.1.1.6 ! root 355: extern void c_expand_asm_operands PROTO((tree, tree, tree, tree, ! 356: int, char *, int)); ! 357: extern void c_expand_return PROTO((tree)); ! 358: extern tree c_expand_start_case PROTO((tree)); 1.1.1.4 root 359: 360: /* in c-iterate.c */ 361: extern void iterator_expand PROTO((tree)); 362: extern void iterator_for_loop_start PROTO((tree)); 363: extern void iterator_for_loop_end PROTO((tree)); 364: extern void iterator_for_loop_record PROTO((tree)); 365: extern void push_iterator_stack PROTO((void)); 366: extern void pop_iterator_stack PROTO((void)); 1.1 root 367: 368: /* Set to 0 at beginning of a function definition, set to 1 if 369: a return statement that specifies a return value is seen. */ 370: 371: extern int current_function_returns_value; 372: 373: /* Set to 0 at beginning of a function definition, set to 1 if 374: a return statement with no argument is seen. */ 375: 376: extern int current_function_returns_null; 377: 378: /* Nonzero means `$' can be in an identifier. */ 379: 380: extern int dollars_in_ident; 381: 382: /* Nonzero means allow type mismatches in conditional expressions; 383: just make their values `void'. */ 384: 385: extern int flag_cond_mismatch; 386: 387: /* Nonzero means don't recognize the keyword `asm'. */ 388: 389: extern int flag_no_asm; 390: 391: /* Nonzero means ignore `#ident' directives. */ 392: 393: extern int flag_no_ident; 394: 395: /* Nonzero means warn about implicit declarations. */ 396: 397: extern int warn_implicit; 398: 399: /* Nonzero means give string constants the type `const char *' 400: to get extra warnings from them. These warnings will be too numerous 401: to be useful, except in thoroughly ANSIfied programs. */ 402: 403: extern int warn_write_strings; 404: 405: /* Nonzero means warn about sizeof (function) or addition/subtraction 406: of function pointers. */ 407: 408: extern int warn_pointer_arith; 409: 410: /* Nonzero means warn for all old-style non-prototype function decls. */ 411: 412: extern int warn_strict_prototypes; 413: 414: /* Nonzero means warn about multiple (redundant) decls for the same single 415: variable or function. */ 416: 417: extern int warn_redundant_decls; 418: 419: /* Nonzero means warn about extern declarations of objects not at 420: file-scope level and about *all* declarations of functions (whether 421: extern or static) not at file-scope level. Note that we exclude 422: implicit function declarations. To get warnings about those, use 423: -Wimplicit. */ 424: 425: extern int warn_nested_externs; 426: 427: /* Nonzero means warn about pointer casts that can drop a type qualifier 428: from the pointer target type. */ 429: 430: extern int warn_cast_qual; 431: 1.1.1.6 ! root 432: /* Nonzero means warn when casting a function call to a type that does ! 433: not match the return type (e.g. (float)sqrt() or (anything*)malloc() ! 434: when there is no previous declaration of sqrt or malloc. */ ! 435: ! 436: extern int warn_bad_function_cast; ! 437: 1.1 root 438: /* Warn about traditional constructs whose meanings changed in ANSI C. */ 439: 440: extern int warn_traditional; 441: 442: /* Warn about *printf or *scanf format/argument anomalies. */ 443: 444: extern int warn_format; 445: 446: /* Warn about a subscript that has type char. */ 447: 448: extern int warn_char_subscripts; 449: 450: /* Warn if a type conversion is done that might have confusing results. */ 451: 452: extern int warn_conversion; 453: 454: /* Nonzero means do some things the same way PCC does. */ 455: 456: extern int flag_traditional; 457: 1.1.1.5 root 458: /* Nonzero means to allow single precision math even if we're generally 459: being traditional. */ 460: extern int flag_allow_single_precision; 461: 1.1 root 462: /* Nonzero means warn about suggesting putting in ()'s. */ 463: 464: extern int warn_parentheses; 465: 1.1.1.4 root 466: /* Warn if initializer is not completely bracketed. */ 467: 468: extern int warn_missing_braces; 469: 1.1 root 470: /* Nonzero means this is a function to call to perform comptypes 471: on two record types. */ 472: 473: extern int (*comptypes_record_hook) (); 474: 475: /* Nonzero means we are reading code that came from a system header file. */ 476: 477: extern int system_header_p; 1.1.1.4 root 478: 479: /* Nonzero enables objc features. */ 480: 481: extern int doing_objc_thang; 482: 483: #endif /* not _C_TREE_H */
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