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1.1 root 1: /* Definitions for C parsing and type checking. 1.1.1.7 ! root 2: Copyright (C) 1987, 1993, 1994, 1995 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 1.1.1.7 ! root 18: the Free Software Foundation, 59 Temple Place - Suite 330, ! 19: Boston, MA 02111-1307, USA. */ 1.1 root 20: 1.1.1.4 root 21: #ifndef _C_TREE_H 22: #define _C_TREE_H 23: 1.1 root 24: /* Language-dependent contents of an identifier. */ 25: 1.1.1.3 root 26: /* The limbo_value is used for block level extern declarations, which need 27: to be type checked against subsequent extern declarations. They can't 28: be referenced after they fall out of scope, so they can't be global. */ 29: 1.1 root 30: struct lang_identifier 31: { 32: struct tree_identifier ignore; 33: tree global_value, local_value, label_value, implicit_decl; 1.1.1.3 root 34: tree error_locus, limbo_value; 1.1 root 35: }; 36: 37: /* Macros for access to language-specific slots in an identifier. */ 1.1.1.3 root 38: /* Each of these slots contains a DECL node or null. */ 1.1 root 39: 1.1.1.3 root 40: /* This represents the value which the identifier has in the 41: file-scope namespace. */ 1.1 root 42: #define IDENTIFIER_GLOBAL_VALUE(NODE) \ 43: (((struct lang_identifier *)(NODE))->global_value) 1.1.1.3 root 44: /* This represents the value which the identifier has in the current 45: scope. */ 1.1 root 46: #define IDENTIFIER_LOCAL_VALUE(NODE) \ 47: (((struct lang_identifier *)(NODE))->local_value) 1.1.1.3 root 48: /* This represents the value which the identifier has as a label in 49: the current label scope. */ 1.1 root 50: #define IDENTIFIER_LABEL_VALUE(NODE) \ 51: (((struct lang_identifier *)(NODE))->label_value) 1.1.1.3 root 52: /* This records the extern decl of this identifier, if it has had one 53: at any point in this compilation. */ 54: #define IDENTIFIER_LIMBO_VALUE(NODE) \ 55: (((struct lang_identifier *)(NODE))->limbo_value) 56: /* This records the implicit function decl of this identifier, if it 57: has had one at any point in this compilation. */ 1.1 root 58: #define IDENTIFIER_IMPLICIT_DECL(NODE) \ 59: (((struct lang_identifier *)(NODE))->implicit_decl) 1.1.1.3 root 60: /* This is the last function in which we printed an "undefined variable" 61: message for this identifier. Value is a FUNCTION_DECL or null. */ 1.1 root 62: #define IDENTIFIER_ERROR_LOCUS(NODE) \ 63: (((struct lang_identifier *)(NODE))->error_locus) 64: 65: /* In identifiers, C uses the following fields in a special way: 66: TREE_PUBLIC to record that there was a previous local extern decl. 67: TREE_USED to record that such a decl was used. 68: TREE_ADDRESSABLE to record that the address of such a decl was used. */ 69: 70: /* Nonzero means reject anything that ANSI standard C forbids. */ 71: extern int pedantic; 72: 73: /* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is read-only. */ 74: #define C_TYPE_FIELDS_READONLY(type) TREE_LANG_FLAG_1 (type) 75: 76: /* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is volatile. */ 77: #define C_TYPE_FIELDS_VOLATILE(type) TREE_LANG_FLAG_2 (type) 78: 79: /* In a RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE 80: nonzero if the definition of the type has already started. */ 81: #define C_TYPE_BEING_DEFINED(type) TYPE_LANG_FLAG_0 (type) 82: 83: /* In a RECORD_TYPE, a sorted array of the fields of the type. */ 84: struct lang_type 85: { 86: int len; 87: tree elts[1]; 88: }; 89: 90: /* Mark which labels are explicitly declared. 91: These may be shadowed, and may be referenced from nested functions. */ 92: #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label) 93: 94: /* Record whether a type or decl was written with nonconstant size. 95: Note that TYPE_SIZE may have simplified to a constant. */ 96: #define C_TYPE_VARIABLE_SIZE(type) TYPE_LANG_FLAG_1 (type) 97: #define C_DECL_VARIABLE_SIZE(type) DECL_LANG_FLAG_0 (type) 98: 99: /* Record in each node resulting from a binary operator 100: what operator was specified for it. */ 101: #define C_EXP_ORIGINAL_CODE(exp) ((enum tree_code) TREE_COMPLEXITY (exp)) 102: 103: #if 0 /* Not used. */ 104: /* Record whether a decl for a function or function pointer has 105: already been mentioned (in a warning) because it was called 106: but didn't have a prototype. */ 107: #define C_MISSING_PROTOTYPE_WARNED(decl) DECL_LANG_FLAG_2(decl) 108: #endif 109: 110: /* Store a value in that field. */ 111: #define C_SET_EXP_ORIGINAL_CODE(exp, code) \ 112: (TREE_COMPLEXITY (exp) = (int)(code)) 113: 114: /* Record whether a typedef for type `int' was actually `signed int'. */ 115: #define C_TYPEDEF_EXPLICITLY_SIGNED(exp) DECL_LANG_FLAG_1 ((exp)) 116: 1.1.1.3 root 117: /* Nonzero for a declaration of a built in function if there has been no 118: occasion that would declare the function in ordinary C. 119: Using the function draws a pedantic warning in this case. */ 120: #define C_DECL_ANTICIPATED(exp) DECL_LANG_FLAG_3 ((exp)) 121: 1.1 root 122: /* For FUNCTION_TYPE, a hidden list of types of arguments. The same as 123: TYPE_ARG_TYPES for functions with prototypes, but created for functions 124: without prototypes. */ 125: #define TYPE_ACTUAL_ARG_TYPES(NODE) TYPE_NONCOPIED_PARTS (NODE) 1.1.1.3 root 126: 127: /* Nonzero if the type T promotes to itself. 128: ANSI C states explicitly the list of types that promote; 129: in particular, short promotes to int even if they have the same width. */ 130: #define C_PROMOTING_INTEGER_TYPE_P(t) \ 131: (TREE_CODE ((t)) == INTEGER_TYPE \ 132: && (TYPE_MAIN_VARIANT (t) == char_type_node \ 133: || TYPE_MAIN_VARIANT (t) == signed_char_type_node \ 134: || TYPE_MAIN_VARIANT (t) == unsigned_char_type_node \ 135: || TYPE_MAIN_VARIANT (t) == short_integer_type_node \ 136: || TYPE_MAIN_VARIANT (t) == short_unsigned_type_node)) 1.1 root 137: 1.1.1.4 root 138: /* In a VAR_DECL, means the variable is really an iterator. */ 139: #define ITERATOR_P(D) (DECL_LANG_FLAG_4(D)) 1.1 root 140: 1.1.1.4 root 141: /* In a VAR_DECL for an iterator, means we are within 142: an explicit loop over that iterator. */ 143: #define ITERATOR_BOUND_P(NODE) ((NODE)->common.readonly_flag) 144: 145: /* in c-lang.c and objc-act.c */ 146: extern tree lookup_interface PROTO((tree)); 147: extern tree is_class_name PROTO((tree)); 148: extern void maybe_objc_check_decl PROTO((tree)); 149: extern int maybe_objc_comptypes PROTO((tree, tree, int)); 150: extern tree maybe_building_objc_message_expr PROTO((void)); 151: extern tree maybe_objc_method_name PROTO((tree)); 152: extern int recognize_objc_keyword PROTO((void)); 153: extern tree build_objc_string PROTO((int, char *)); 154: 155: /* in c-aux-info.c */ 156: extern void gen_aux_info_record PROTO((tree, int, int, int)); 1.1 root 157: 1.1.1.4 root 158: /* in c-common.c */ 1.1.1.5 root 159: extern void declare_function_name PROTO((void)); 1.1.1.7 ! root 160: extern void decl_attributes PROTO((tree, tree, tree)); 1.1.1.5 root 161: extern void init_function_format_info PROTO((void)); 162: extern void record_function_format PROTO((tree, tree, int, int, int)); 163: extern void check_function_format PROTO((tree, tree, tree)); 1.1 root 164: /* Print an error message for invalid operands to arith operation CODE. 165: NOP_EXPR is used as a special case (see truthvalue_conversion). */ 1.1.1.4 root 166: extern void binary_op_error PROTO((enum tree_code)); 167: extern void c_expand_expr_stmt PROTO((tree)); 168: /* Validate the expression after `case' and apply default promotions. */ 169: extern tree check_case_value PROTO((tree)); 170: /* Concatenate a list of STRING_CST nodes into one STRING_CST. */ 171: extern tree combine_strings PROTO((tree)); 172: extern void constant_expression_warning PROTO((tree)); 173: extern tree convert_and_check PROTO((tree, tree)); 174: extern void overflow_warning PROTO((tree)); 175: extern void unsigned_conversion_warning PROTO((tree, tree)); 176: /* Read the rest of the current #-directive line. */ 177: extern char *get_directive_line STDIO_PROTO((FILE *)); 1.1 root 178: /* Subroutine of build_binary_op, used for comparison operations. 179: See if the operands have both been converted from subword integer types 180: and, if so, perhaps change them both back to their original type. */ 1.1.1.4 root 181: extern tree shorten_compare PROTO((tree *, tree *, tree *, enum tree_code *)); 1.1.1.3 root 182: /* Prepare expr to be an argument of a TRUTH_NOT_EXPR, 183: or validate its data type for an `if' or `while' statement or ?..: exp. */ 1.1.1.4 root 184: extern tree truthvalue_conversion PROTO((tree)); 185: extern tree type_for_mode PROTO((enum machine_mode, int)); 186: extern tree type_for_size PROTO((unsigned, int)); 1.1.1.3 root 187: 1.1.1.4 root 188: /* in c-convert.c */ 189: extern tree convert PROTO((tree, tree)); 1.1 root 190: 1.1.1.4 root 191: /* in c-decl.c */ 192: /* Standard named or nameless data types of the C compiler. */ 193: extern tree char_array_type_node; 194: extern tree char_type_node; 195: extern tree const_ptr_type_node; 196: extern tree const_string_type_node; 1.1 root 197: extern tree default_function_type; 1.1.1.4 root 198: extern tree double_ftype_double; 199: extern tree double_ftype_double_double; 200: extern tree double_type_node; 201: extern tree float_type_node; 202: extern tree intDI_type_node; 203: extern tree intHI_type_node; 204: extern tree intQI_type_node; 205: extern tree intSI_type_node; 206: extern tree int_array_type_node; 207: extern tree int_ftype_cptr_cptr_sizet; 208: extern tree int_ftype_int; 209: extern tree int_ftype_ptr_ptr_int; 210: extern tree int_ftype_string_string; 211: extern tree integer_type_node; 212: extern tree long_double_type_node; 213: extern tree long_ftype_long; 214: extern tree long_integer_type_node; 215: extern tree long_long_integer_type_node; 216: extern tree long_long_unsigned_type_node; 217: extern tree long_unsigned_type_node; 218: extern tree complex_integer_type_node; 219: extern tree complex_float_type_node; 220: extern tree complex_double_type_node; 221: extern tree complex_long_double_type_node; 222: extern tree ptr_type_node; 223: extern tree ptrdiff_type_node; 224: extern tree short_integer_type_node; 225: extern tree short_unsigned_type_node; 226: extern tree signed_char_type_node; 227: extern tree signed_wchar_type_node; 228: extern tree string_ftype_ptr_ptr; 229: extern tree string_type_node; 230: extern tree unsigned_char_type_node; 231: extern tree unsigned_intDI_type_node; 232: extern tree unsigned_intHI_type_node; 233: extern tree unsigned_intQI_type_node; 234: extern tree unsigned_intSI_type_node; 235: extern tree unsigned_type_node; 236: extern tree unsigned_wchar_type_node; 237: extern tree void_ftype_ptr_int_int; 238: extern tree void_ftype_ptr_ptr_int; 239: extern tree void_type_node; 240: extern tree wchar_array_type_node; 241: extern tree wchar_type_node; 1.1.1.7 ! root 242: extern tree boolean_type_node; ! 243: extern tree boolean_true_node; ! 244: extern tree boolean_false_node; 1.1.1.4 root 245: 246: extern tree build_enumerator PROTO((tree, tree)); 247: /* Declare a predefined function. Return the declaration. */ 248: extern tree builtin_function PROTO((char *, tree, enum built_in_function function_, char *)); 249: /* Add qualifiers to a type, in the fashion for C. */ 250: extern tree c_build_type_variant PROTO((tree, int, int)); 251: extern int c_decode_option PROTO((char *)); 252: extern void c_mark_varargs PROTO((void)); 253: extern tree check_identifier PROTO((tree, tree)); 254: extern void clear_parm_order PROTO((void)); 255: extern tree combine_parm_decls PROTO((tree, tree, int)); 256: extern int complete_array_type PROTO((tree, tree, int)); 257: extern void declare_parm_level PROTO((int)); 258: extern tree define_label PROTO((char *, int, tree)); 259: extern void delete_block PROTO((tree)); 260: extern void finish_decl PROTO((tree, tree, tree)); 1.1.1.7 ! root 261: extern void finish_decl_top_level PROTO((tree, tree, tree)); ! 262: extern tree finish_enum PROTO((tree, tree, tree)); 1.1.1.4 root 263: extern void finish_function PROTO((int)); 1.1.1.7 ! root 264: extern tree finish_struct PROTO((tree, tree, tree)); 1.1.1.4 root 265: extern tree get_parm_info PROTO((int)); 266: extern tree getdecls PROTO((void)); 267: extern tree gettags PROTO((void)); 268: extern int global_bindings_p PROTO((void)); 269: extern tree grokfield PROTO((char *, int, tree, tree, tree)); 270: extern tree groktypename PROTO((tree)); 271: extern tree groktypename_in_parm_context PROTO((tree)); 272: extern tree implicitly_declare PROTO((tree)); 273: extern int in_parm_level_p PROTO((void)); 274: extern void init_decl_processing PROTO((void)); 275: extern void insert_block PROTO((tree)); 276: extern void keep_next_level PROTO((void)); 277: extern int kept_level_p PROTO((void)); 278: extern tree lookup_label PROTO((tree)); 279: extern tree lookup_name PROTO((tree)); 280: extern tree lookup_name_current_level PROTO((tree)); 1.1.1.6 root 281: extern tree lookup_name_current_level_global PROTO((tree)); 1.1.1.4 root 282: extern tree maybe_build_cleanup PROTO((tree)); 283: extern void parmlist_tags_warning PROTO((void)); 284: extern void pending_xref_error PROTO((void)); 285: extern void pop_c_function_context PROTO((void)); 286: extern void pop_label_level PROTO((void)); 287: extern tree poplevel PROTO((int, int, int)); 1.1.1.5 root 288: extern void print_lang_decl STDIO_PROTO((FILE *, tree, 289: int)); 1.1.1.4 root 290: extern void print_lang_identifier STDIO_PROTO((FILE *, tree, 291: int)); 1.1.1.5 root 292: extern void print_lang_type STDIO_PROTO((FILE *, tree, 293: int)); 1.1.1.4 root 294: extern void push_c_function_context PROTO((void)); 295: extern void push_label_level PROTO((void)); 296: extern void push_parm_decl PROTO((tree)); 297: extern tree pushdecl PROTO((tree)); 298: extern tree pushdecl_top_level PROTO((tree)); 299: extern void pushlevel PROTO((int)); 300: extern void pushtag PROTO((tree, tree)); 301: extern void set_block PROTO((tree)); 302: extern tree shadow_label PROTO((tree)); 303: extern void shadow_record_fields PROTO((tree)); 304: extern void shadow_tag PROTO((tree)); 305: extern void shadow_tag_warned PROTO((tree, int)); 306: extern tree start_enum PROTO((tree)); 1.1.1.7 ! root 307: extern int start_function PROTO((tree, tree, tree, ! 308: tree, int)); ! 309: extern tree start_decl PROTO((tree, tree, int, ! 310: tree, tree)); 1.1.1.4 root 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 */ 1.1.1.6 root 316: extern tree require_complete_type PROTO((tree)); 317: extern void incomplete_type_error PROTO((tree, tree)); 1.1.1.4 root 318: /* Given two integer or real types, return the type for their sum. 319: Given two compatible ANSI C types, returns the merged type. */ 320: extern tree common_type PROTO((tree, tree)); 1.1.1.6 root 321: extern int comptypes PROTO((tree, tree)); 322: extern int self_promoting_args_p PROTO((tree)); 323: extern tree c_sizeof PROTO((tree)); 324: extern tree c_sizeof_nowarn PROTO((tree)); 325: extern tree c_size_in_bytes PROTO((tree)); 326: extern tree c_alignof PROTO((tree)); 327: extern tree c_alignof_expr PROTO((tree)); 1.1.1.4 root 328: extern tree default_conversion PROTO((tree)); 1.1.1.6 root 329: extern tree build_component_ref PROTO((tree, tree)); 330: extern tree build_indirect_ref PROTO((tree, char *)); 331: extern tree build_array_ref PROTO((tree, tree)); 332: extern tree build_function_call PROTO((tree, tree)); 333: extern tree parser_build_binary_op PROTO((enum tree_code, 334: tree, tree)); 335: extern tree build_binary_op PROTO((enum tree_code, 336: tree, tree, int)); 337: extern tree build_unary_op PROTO((enum tree_code, 338: tree, int)); 339: extern int lvalue_p PROTO((tree)); 340: extern int lvalue_or_else PROTO((tree, char *)); 341: extern void readonly_warning PROTO((tree, char *)); 342: extern int mark_addressable PROTO((tree)); 343: extern tree build_conditional_expr PROTO((tree, tree, tree)); 344: extern tree build_compound_expr PROTO((tree)); 345: extern tree build_c_cast PROTO((tree, tree)); 346: extern tree build_modify_expr PROTO((tree, enum tree_code, 347: tree)); 348: extern tree initializer_constant_valid_p PROTO((tree, tree)); 1.1.1.4 root 349: extern void store_init_value PROTO((tree, tree)); 1.1.1.6 root 350: extern void error_init PROTO((char *, char *, 351: char *)); 352: extern void pedwarn_init PROTO((char *, char *, 353: char *)); 1.1.1.5 root 354: extern void start_init PROTO((tree, tree, int)); 355: extern void finish_init PROTO((void)); 356: extern void really_start_incremental_init PROTO((tree)); 357: extern void push_init_level PROTO((int)); 358: extern tree pop_init_level PROTO((int)); 359: extern void set_init_index PROTO((tree, tree)); 360: extern void set_init_label PROTO((tree)); 361: extern void process_init_element PROTO((tree)); 1.1.1.6 root 362: extern void c_expand_asm_operands PROTO((tree, tree, tree, tree, 363: int, char *, int)); 364: extern void c_expand_return PROTO((tree)); 365: extern tree c_expand_start_case PROTO((tree)); 1.1.1.4 root 366: 367: /* in c-iterate.c */ 368: extern void iterator_expand PROTO((tree)); 369: extern void iterator_for_loop_start PROTO((tree)); 370: extern void iterator_for_loop_end PROTO((tree)); 371: extern void iterator_for_loop_record PROTO((tree)); 372: extern void push_iterator_stack PROTO((void)); 373: extern void pop_iterator_stack PROTO((void)); 1.1 root 374: 375: /* Set to 0 at beginning of a function definition, set to 1 if 376: a return statement that specifies a return value is seen. */ 377: 378: extern int current_function_returns_value; 379: 380: /* Set to 0 at beginning of a function definition, set to 1 if 381: a return statement with no argument is seen. */ 382: 383: extern int current_function_returns_null; 384: 385: /* Nonzero means `$' can be in an identifier. */ 386: 387: extern int dollars_in_ident; 388: 389: /* Nonzero means allow type mismatches in conditional expressions; 390: just make their values `void'. */ 391: 392: extern int flag_cond_mismatch; 393: 394: /* Nonzero means don't recognize the keyword `asm'. */ 395: 396: extern int flag_no_asm; 397: 398: /* Nonzero means ignore `#ident' directives. */ 399: 400: extern int flag_no_ident; 401: 402: /* Nonzero means warn about implicit declarations. */ 403: 404: extern int warn_implicit; 405: 406: /* Nonzero means give string constants the type `const char *' 407: to get extra warnings from them. These warnings will be too numerous 408: to be useful, except in thoroughly ANSIfied programs. */ 409: 410: extern int warn_write_strings; 411: 412: /* Nonzero means warn about sizeof (function) or addition/subtraction 413: of function pointers. */ 414: 415: extern int warn_pointer_arith; 416: 417: /* Nonzero means warn for all old-style non-prototype function decls. */ 418: 419: extern int warn_strict_prototypes; 420: 421: /* Nonzero means warn about multiple (redundant) decls for the same single 422: variable or function. */ 423: 424: extern int warn_redundant_decls; 425: 426: /* Nonzero means warn about extern declarations of objects not at 427: file-scope level and about *all* declarations of functions (whether 428: extern or static) not at file-scope level. Note that we exclude 429: implicit function declarations. To get warnings about those, use 430: -Wimplicit. */ 431: 432: extern int warn_nested_externs; 433: 434: /* Nonzero means warn about pointer casts that can drop a type qualifier 435: from the pointer target type. */ 436: 437: extern int warn_cast_qual; 438: 1.1.1.6 root 439: /* Nonzero means warn when casting a function call to a type that does 440: not match the return type (e.g. (float)sqrt() or (anything*)malloc() 441: when there is no previous declaration of sqrt or malloc. */ 442: 443: extern int warn_bad_function_cast; 444: 1.1 root 445: /* Warn about traditional constructs whose meanings changed in ANSI C. */ 446: 447: extern int warn_traditional; 448: 449: /* Warn about *printf or *scanf format/argument anomalies. */ 450: 451: extern int warn_format; 452: 453: /* Warn about a subscript that has type char. */ 454: 455: extern int warn_char_subscripts; 456: 457: /* Warn if a type conversion is done that might have confusing results. */ 458: 459: extern int warn_conversion; 460: 461: /* Nonzero means do some things the same way PCC does. */ 462: 463: extern int flag_traditional; 464: 1.1.1.5 root 465: /* Nonzero means to allow single precision math even if we're generally 466: being traditional. */ 467: extern int flag_allow_single_precision; 468: 1.1 root 469: /* Nonzero means warn about suggesting putting in ()'s. */ 470: 471: extern int warn_parentheses; 472: 1.1.1.4 root 473: /* Warn if initializer is not completely bracketed. */ 474: 475: extern int warn_missing_braces; 476: 1.1 root 477: /* Nonzero means this is a function to call to perform comptypes 478: on two record types. */ 479: 480: extern int (*comptypes_record_hook) (); 481: 482: /* Nonzero means we are reading code that came from a system header file. */ 483: 484: extern int system_header_p; 1.1.1.4 root 485: 486: /* Nonzero enables objc features. */ 487: 488: extern int doing_objc_thang; 489: 490: #endif /* not _C_TREE_H */
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