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