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1.1 root 1: /* Definitions for C parsing and type checking. 1.1.1.4 ! root 2: Copyright (C) 1987, 1993 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: ! 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: 1.1 root 31: /* Language-dependent contents of an identifier. */ 32: 1.1.1.3 root 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: 1.1 root 37: struct lang_identifier 38: { 39: struct tree_identifier ignore; 40: tree global_value, local_value, label_value, implicit_decl; 1.1.1.3 root 41: tree error_locus, limbo_value; 1.1 root 42: }; 43: 44: /* Macros for access to language-specific slots in an identifier. */ 1.1.1.3 root 45: /* Each of these slots contains a DECL node or null. */ 1.1 root 46: 1.1.1.3 root 47: /* This represents the value which the identifier has in the 48: file-scope namespace. */ 1.1 root 49: #define IDENTIFIER_GLOBAL_VALUE(NODE) \ 50: (((struct lang_identifier *)(NODE))->global_value) 1.1.1.3 root 51: /* This represents the value which the identifier has in the current 52: scope. */ 1.1 root 53: #define IDENTIFIER_LOCAL_VALUE(NODE) \ 54: (((struct lang_identifier *)(NODE))->local_value) 1.1.1.3 root 55: /* This represents the value which the identifier has as a label in 56: the current label scope. */ 1.1 root 57: #define IDENTIFIER_LABEL_VALUE(NODE) \ 58: (((struct lang_identifier *)(NODE))->label_value) 1.1.1.3 root 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. */ 1.1 root 65: #define IDENTIFIER_IMPLICIT_DECL(NODE) \ 66: (((struct lang_identifier *)(NODE))->implicit_decl) 1.1.1.3 root 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. */ 1.1 root 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: 1.1.1.3 root 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: 1.1 root 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) 1.1.1.3 root 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)) 1.1 root 144: 1.1.1.4 ! root 145: /* In a VAR_DECL, means the variable is really an iterator. */ ! 146: #define ITERATOR_P(D) (DECL_LANG_FLAG_4(D)) 1.1 root 147: 1.1.1.4 ! root 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)); 1.1 root 164: 1.1.1.4 ! root 165: /* in c-common.c */ 1.1 root 166: /* Print an error message for invalid operands to arith operation CODE. 167: NOP_EXPR is used as a special case (see truthvalue_conversion). */ 1.1.1.4 ! root 168: extern void binary_op_error PROTO((enum tree_code)); ! 169: extern void c_expand_expr_stmt PROTO((tree)); ! 170: /* Validate the expression after `case' and apply default promotions. */ ! 171: extern tree check_case_value PROTO((tree)); ! 172: /* Concatenate a list of STRING_CST nodes into one STRING_CST. */ ! 173: extern tree combine_strings PROTO((tree)); ! 174: extern void constant_expression_warning PROTO((tree)); ! 175: extern void decl_attributes PROTO((tree, tree)); ! 176: extern void declare_function_name PROTO((void)); ! 177: extern tree convert_and_check PROTO((tree, tree)); ! 178: extern void overflow_warning PROTO((tree)); ! 179: extern void unsigned_conversion_warning PROTO((tree, tree)); ! 180: /* Read the rest of the current #-directive line. */ ! 181: extern char *get_directive_line STDIO_PROTO((FILE *)); 1.1 root 182: /* Subroutine of build_binary_op, used for comparison operations. 183: See if the operands have both been converted from subword integer types 184: and, if so, perhaps change them both back to their original type. */ 1.1.1.4 ! root 185: extern tree shorten_compare PROTO((tree *, tree *, tree *, enum tree_code *)); 1.1.1.3 root 186: /* Prepare expr to be an argument of a TRUTH_NOT_EXPR, 187: or validate its data type for an `if' or `while' statement or ?..: exp. */ 1.1.1.4 ! root 188: extern tree truthvalue_conversion PROTO((tree)); ! 189: extern tree type_for_mode PROTO((enum machine_mode, int)); ! 190: extern tree type_for_size PROTO((unsigned, int)); 1.1.1.3 root 191: 1.1.1.4 ! root 192: /* in c-convert.c */ ! 193: extern tree convert PROTO((tree, tree)); 1.1 root 194: 1.1.1.4 ! root 195: /* in c-decl.c */ ! 196: /* Standard named or nameless data types of the C compiler. */ ! 197: extern tree char_array_type_node; ! 198: extern tree char_type_node; ! 199: extern tree const_ptr_type_node; ! 200: extern tree const_string_type_node; 1.1 root 201: extern tree default_function_type; 1.1.1.4 ! root 202: extern tree double_ftype_double; ! 203: extern tree double_ftype_double_double; ! 204: extern tree double_type_node; ! 205: extern tree float_type_node; ! 206: extern tree intDI_type_node; ! 207: extern tree intHI_type_node; ! 208: extern tree intQI_type_node; ! 209: extern tree intSI_type_node; ! 210: extern tree int_array_type_node; ! 211: extern tree int_ftype_cptr_cptr_sizet; ! 212: extern tree int_ftype_int; ! 213: extern tree int_ftype_ptr_ptr_int; ! 214: extern tree int_ftype_string_string; ! 215: extern tree integer_type_node; ! 216: extern tree long_double_type_node; ! 217: extern tree long_ftype_long; ! 218: extern tree long_integer_type_node; ! 219: extern tree long_long_integer_type_node; ! 220: extern tree long_long_unsigned_type_node; ! 221: extern tree long_unsigned_type_node; ! 222: extern tree complex_integer_type_node; ! 223: extern tree complex_float_type_node; ! 224: extern tree complex_double_type_node; ! 225: extern tree complex_long_double_type_node; ! 226: extern tree ptr_type_node; ! 227: extern tree ptrdiff_type_node; ! 228: extern tree short_integer_type_node; ! 229: extern tree short_unsigned_type_node; ! 230: extern tree signed_char_type_node; ! 231: extern tree signed_wchar_type_node; ! 232: extern tree string_ftype_ptr_ptr; ! 233: extern tree string_type_node; ! 234: extern tree unsigned_char_type_node; ! 235: extern tree unsigned_intDI_type_node; ! 236: extern tree unsigned_intHI_type_node; ! 237: extern tree unsigned_intQI_type_node; ! 238: extern tree unsigned_intSI_type_node; ! 239: extern tree unsigned_type_node; ! 240: extern tree unsigned_wchar_type_node; ! 241: extern tree void_ftype_ptr_int_int; ! 242: extern tree void_ftype_ptr_ptr_int; ! 243: extern tree void_type_node; ! 244: extern tree wchar_array_type_node; ! 245: extern tree wchar_type_node; ! 246: ! 247: extern tree build_enumerator PROTO((tree, tree)); ! 248: /* Declare a predefined function. Return the declaration. */ ! 249: extern tree builtin_function PROTO((char *, tree, enum built_in_function function_, char *)); ! 250: /* Add qualifiers to a type, in the fashion for C. */ ! 251: extern tree c_build_type_variant PROTO((tree, int, int)); ! 252: extern int c_decode_option PROTO((char *)); ! 253: extern void c_mark_varargs PROTO((void)); ! 254: extern tree check_identifier PROTO((tree, tree)); ! 255: extern void clear_parm_order PROTO((void)); ! 256: extern tree combine_parm_decls PROTO((tree, tree, int)); ! 257: extern int complete_array_type PROTO((tree, tree, int)); ! 258: extern void declare_parm_level PROTO((int)); ! 259: extern tree define_label PROTO((char *, int, tree)); ! 260: extern void delete_block PROTO((tree)); ! 261: extern void finish_decl PROTO((tree, tree, tree)); ! 262: extern tree finish_enum PROTO((tree, tree)); ! 263: extern void finish_function PROTO((int)); ! 264: extern tree finish_struct PROTO((tree, tree)); ! 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)); ! 281: extern tree maybe_build_cleanup PROTO((tree)); ! 282: extern void parmlist_tags_warning PROTO((void)); ! 283: extern void pending_xref_error PROTO((void)); ! 284: extern void pop_c_function_context PROTO((void)); ! 285: extern void pop_label_level PROTO((void)); ! 286: extern tree poplevel PROTO((int, int, int)); ! 287: extern void print_lang_decl PROTO((void)); ! 288: extern void print_lang_identifier STDIO_PROTO((FILE *, tree, ! 289: int)); ! 290: extern void print_lang_type PROTO((void)); ! 291: extern void push_c_function_context PROTO((void)); ! 292: extern void push_label_level PROTO((void)); ! 293: extern void push_parm_decl PROTO((tree)); ! 294: extern tree pushdecl PROTO((tree)); ! 295: extern tree pushdecl_top_level PROTO((tree)); ! 296: extern void pushlevel PROTO((int)); ! 297: extern void pushtag PROTO((tree, tree)); ! 298: extern void set_block PROTO((tree)); ! 299: extern tree shadow_label PROTO((tree)); ! 300: extern void shadow_record_fields PROTO((tree)); ! 301: extern void shadow_tag PROTO((tree)); ! 302: extern void shadow_tag_warned PROTO((tree, int)); ! 303: extern tree start_enum PROTO((tree)); ! 304: extern int start_function PROTO((tree, tree, int)); ! 305: extern tree start_decl PROTO((tree, tree, int)); ! 306: extern tree start_struct PROTO((enum tree_code, tree)); ! 307: extern void store_parm_decls PROTO((void)); ! 308: extern tree xref_tag PROTO((enum tree_code, tree)); ! 309: ! 310: /* in c-typeck.c */ ! 311: extern tree build_array_ref PROTO((tree, tree)); ! 312: extern tree build_binary_op PROTO((enum tree_code, tree, tree, int)); ! 313: extern tree build_c_cast PROTO((tree, tree)); ! 314: extern tree build_component_ref PROTO((tree, tree)); ! 315: extern tree build_compound_expr PROTO((tree)); ! 316: extern tree build_conditional_expr PROTO((tree, tree, tree)); ! 317: extern tree build_function_call PROTO((tree, tree)); ! 318: extern tree build_indirect_ref PROTO((tree, char *)); ! 319: extern tree build_modify_expr PROTO((tree, enum tree_code, tree)); ! 320: extern tree build_unary_op PROTO((enum tree_code, tree, int)); ! 321: extern tree c_alignof PROTO((tree)); ! 322: extern tree c_alignof_expr PROTO((tree)); ! 323: extern tree c_sizeof PROTO((tree)); ! 324: extern tree c_expand_start_case PROTO((tree)); ! 325: /* Given two integer or real types, return the type for their sum. ! 326: Given two compatible ANSI C types, returns the merged type. */ ! 327: extern tree common_type PROTO((tree, tree)); ! 328: extern tree default_conversion PROTO((tree)); ! 329: extern tree digest_init PROTO((tree, tree, tree *, int, int, char *)); ! 330: extern tree parser_build_binary_op PROTO((enum tree_code, tree, tree)); ! 331: extern tree require_complete_type PROTO((tree)); ! 332: extern void store_init_value PROTO((tree, tree)); ! 333: ! 334: /* in c-iterate.c */ ! 335: extern void iterator_expand PROTO((tree)); ! 336: extern void iterator_for_loop_start PROTO((tree)); ! 337: extern void iterator_for_loop_end PROTO((tree)); ! 338: extern void iterator_for_loop_record PROTO((tree)); ! 339: extern void push_iterator_stack PROTO((void)); ! 340: extern void pop_iterator_stack PROTO((void)); 1.1 root 341: 342: /* Set to 0 at beginning of a function definition, set to 1 if 343: a return statement that specifies a return value is seen. */ 344: 345: extern int current_function_returns_value; 346: 347: /* Set to 0 at beginning of a function definition, set to 1 if 348: a return statement with no argument is seen. */ 349: 350: extern int current_function_returns_null; 351: 352: /* Nonzero means `$' can be in an identifier. */ 353: 354: extern int dollars_in_ident; 355: 356: /* Nonzero means allow type mismatches in conditional expressions; 357: just make their values `void'. */ 358: 359: extern int flag_cond_mismatch; 360: 361: /* Nonzero means don't recognize the keyword `asm'. */ 362: 363: extern int flag_no_asm; 364: 365: /* Nonzero means ignore `#ident' directives. */ 366: 367: extern int flag_no_ident; 368: 369: /* Nonzero means warn about implicit declarations. */ 370: 371: extern int warn_implicit; 372: 373: /* Nonzero means give string constants the type `const char *' 374: to get extra warnings from them. These warnings will be too numerous 375: to be useful, except in thoroughly ANSIfied programs. */ 376: 377: extern int warn_write_strings; 378: 379: /* Nonzero means warn about sizeof (function) or addition/subtraction 380: of function pointers. */ 381: 382: extern int warn_pointer_arith; 383: 384: /* Nonzero means warn for all old-style non-prototype function decls. */ 385: 386: extern int warn_strict_prototypes; 387: 388: /* Nonzero means warn about multiple (redundant) decls for the same single 389: variable or function. */ 390: 391: extern int warn_redundant_decls; 392: 393: /* Nonzero means warn about extern declarations of objects not at 394: file-scope level and about *all* declarations of functions (whether 395: extern or static) not at file-scope level. Note that we exclude 396: implicit function declarations. To get warnings about those, use 397: -Wimplicit. */ 398: 399: extern int warn_nested_externs; 400: 401: /* Nonzero means warn about pointer casts that can drop a type qualifier 402: from the pointer target type. */ 403: 404: extern int warn_cast_qual; 405: 406: /* Warn about traditional constructs whose meanings changed in ANSI C. */ 407: 408: extern int warn_traditional; 409: 410: /* Warn about *printf or *scanf format/argument anomalies. */ 411: 412: extern int warn_format; 413: 414: /* Warn about a subscript that has type char. */ 415: 416: extern int warn_char_subscripts; 417: 418: /* Warn if a type conversion is done that might have confusing results. */ 419: 420: extern int warn_conversion; 421: 422: /* Nonzero means do some things the same way PCC does. */ 423: 424: extern int flag_traditional; 425: 426: /* Nonzero means warn about suggesting putting in ()'s. */ 427: 428: extern int warn_parentheses; 429: 1.1.1.4 ! root 430: /* Warn if initializer is not completely bracketed. */ ! 431: ! 432: extern int warn_missing_braces; ! 433: 1.1 root 434: /* Nonzero means this is a function to call to perform comptypes 435: on two record types. */ 436: 437: extern int (*comptypes_record_hook) (); 438: 439: /* Nonzero means we are reading code that came from a system header file. */ 440: 441: extern int system_header_p; 1.1.1.4 ! root 442: ! 443: /* Nonzero enables objc features. */ ! 444: ! 445: extern int doing_objc_thang; ! 446: ! 447: #endif /* not _C_TREE_H */
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