| 1 | /* YACC parser for Fortran expressions, for GDB. |
| 2 | Copyright 1986, 1989, 1990, 1991, 1993, 1994, 1995, 1996, 2000, 2001 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | Contributed by Motorola. Adapted from the C parser by Farooq Butt |
| 6 | (fmbutt@engage.sps.mot.com). |
| 7 | |
| 8 | This file is part of GDB. |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 2 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program; if not, write to the Free Software |
| 22 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 23 | |
| 24 | /* This was blantantly ripped off the C expression parser, please |
| 25 | be aware of that as you look at its basic structure -FMB */ |
| 26 | |
| 27 | /* Parse a F77 expression from text in a string, |
| 28 | and return the result as a struct expression pointer. |
| 29 | That structure contains arithmetic operations in reverse polish, |
| 30 | with constants represented by operations that are followed by special data. |
| 31 | See expression.h for the details of the format. |
| 32 | What is important here is that it can be built up sequentially |
| 33 | during the process of parsing; the lower levels of the tree always |
| 34 | come first in the result. |
| 35 | |
| 36 | Note that malloc's and realloc's in this file are transformed to |
| 37 | xmalloc and xrealloc respectively by the same sed command in the |
| 38 | makefile that remaps any other malloc/realloc inserted by the parser |
| 39 | generator. Doing this with #defines and trying to control the interaction |
| 40 | with include files (<malloc.h> and <stdlib.h> for example) just became |
| 41 | too messy, particularly when such includes can be inserted at random |
| 42 | times by the parser generator. */ |
| 43 | |
| 44 | %{ |
| 45 | |
| 46 | #include "defs.h" |
| 47 | #include "gdb_string.h" |
| 48 | #include "expression.h" |
| 49 | #include "value.h" |
| 50 | #include "parser-defs.h" |
| 51 | #include "language.h" |
| 52 | #include "f-lang.h" |
| 53 | #include "bfd.h" /* Required by objfiles.h. */ |
| 54 | #include "symfile.h" /* Required by objfiles.h. */ |
| 55 | #include "objfiles.h" /* For have_full_symbols and have_partial_symbols */ |
| 56 | #include <ctype.h> |
| 57 | |
| 58 | /* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc), |
| 59 | as well as gratuitiously global symbol names, so we can have multiple |
| 60 | yacc generated parsers in gdb. Note that these are only the variables |
| 61 | produced by yacc. If other parser generators (bison, byacc, etc) produce |
| 62 | additional global names that conflict at link time, then those parser |
| 63 | generators need to be fixed instead of adding those names to this list. */ |
| 64 | |
| 65 | #define yymaxdepth f_maxdepth |
| 66 | #define yyparse f_parse |
| 67 | #define yylex f_lex |
| 68 | #define yyerror f_error |
| 69 | #define yylval f_lval |
| 70 | #define yychar f_char |
| 71 | #define yydebug f_debug |
| 72 | #define yypact f_pact |
| 73 | #define yyr1 f_r1 |
| 74 | #define yyr2 f_r2 |
| 75 | #define yydef f_def |
| 76 | #define yychk f_chk |
| 77 | #define yypgo f_pgo |
| 78 | #define yyact f_act |
| 79 | #define yyexca f_exca |
| 80 | #define yyerrflag f_errflag |
| 81 | #define yynerrs f_nerrs |
| 82 | #define yyps f_ps |
| 83 | #define yypv f_pv |
| 84 | #define yys f_s |
| 85 | #define yy_yys f_yys |
| 86 | #define yystate f_state |
| 87 | #define yytmp f_tmp |
| 88 | #define yyv f_v |
| 89 | #define yy_yyv f_yyv |
| 90 | #define yyval f_val |
| 91 | #define yylloc f_lloc |
| 92 | #define yyreds f_reds /* With YYDEBUG defined */ |
| 93 | #define yytoks f_toks /* With YYDEBUG defined */ |
| 94 | #define yyname f_name /* With YYDEBUG defined */ |
| 95 | #define yyrule f_rule /* With YYDEBUG defined */ |
| 96 | #define yylhs f_yylhs |
| 97 | #define yylen f_yylen |
| 98 | #define yydefred f_yydefred |
| 99 | #define yydgoto f_yydgoto |
| 100 | #define yysindex f_yysindex |
| 101 | #define yyrindex f_yyrindex |
| 102 | #define yygindex f_yygindex |
| 103 | #define yytable f_yytable |
| 104 | #define yycheck f_yycheck |
| 105 | |
| 106 | #ifndef YYDEBUG |
| 107 | #define YYDEBUG 1 /* Default to yydebug support */ |
| 108 | #endif |
| 109 | |
| 110 | #define YYFPRINTF parser_fprintf |
| 111 | |
| 112 | int yyparse (void); |
| 113 | |
| 114 | static int yylex (void); |
| 115 | |
| 116 | void yyerror (char *); |
| 117 | |
| 118 | static void growbuf_by_size (int); |
| 119 | |
| 120 | static int match_string_literal (void); |
| 121 | |
| 122 | %} |
| 123 | |
| 124 | /* Although the yacc "value" of an expression is not used, |
| 125 | since the result is stored in the structure being created, |
| 126 | other node types do have values. */ |
| 127 | |
| 128 | %union |
| 129 | { |
| 130 | LONGEST lval; |
| 131 | struct { |
| 132 | LONGEST val; |
| 133 | struct type *type; |
| 134 | } typed_val; |
| 135 | DOUBLEST dval; |
| 136 | struct symbol *sym; |
| 137 | struct type *tval; |
| 138 | struct stoken sval; |
| 139 | struct ttype tsym; |
| 140 | struct symtoken ssym; |
| 141 | int voidval; |
| 142 | struct block *bval; |
| 143 | enum exp_opcode opcode; |
| 144 | struct internalvar *ivar; |
| 145 | |
| 146 | struct type **tvec; |
| 147 | int *ivec; |
| 148 | } |
| 149 | |
| 150 | %{ |
| 151 | /* YYSTYPE gets defined by %union */ |
| 152 | static int parse_number (char *, int, int, YYSTYPE *); |
| 153 | %} |
| 154 | |
| 155 | %type <voidval> exp type_exp start variable |
| 156 | %type <tval> type typebase |
| 157 | %type <tvec> nonempty_typelist |
| 158 | /* %type <bval> block */ |
| 159 | |
| 160 | /* Fancy type parsing. */ |
| 161 | %type <voidval> func_mod direct_abs_decl abs_decl |
| 162 | %type <tval> ptype |
| 163 | |
| 164 | %token <typed_val> INT |
| 165 | %token <dval> FLOAT |
| 166 | |
| 167 | /* Both NAME and TYPENAME tokens represent symbols in the input, |
| 168 | and both convey their data as strings. |
| 169 | But a TYPENAME is a string that happens to be defined as a typedef |
| 170 | or builtin type name (such as int or char) |
| 171 | and a NAME is any other symbol. |
| 172 | Contexts where this distinction is not important can use the |
| 173 | nonterminal "name", which matches either NAME or TYPENAME. */ |
| 174 | |
| 175 | %token <sval> STRING_LITERAL |
| 176 | %token <lval> BOOLEAN_LITERAL |
| 177 | %token <ssym> NAME |
| 178 | %token <tsym> TYPENAME |
| 179 | %type <sval> name |
| 180 | %type <ssym> name_not_typename |
| 181 | %type <tsym> typename |
| 182 | |
| 183 | /* A NAME_OR_INT is a symbol which is not known in the symbol table, |
| 184 | but which would parse as a valid number in the current input radix. |
| 185 | E.g. "c" when input_radix==16. Depending on the parse, it will be |
| 186 | turned into a name or into a number. */ |
| 187 | |
| 188 | %token <ssym> NAME_OR_INT |
| 189 | |
| 190 | %token SIZEOF |
| 191 | %token ERROR |
| 192 | |
| 193 | /* Special type cases, put in to allow the parser to distinguish different |
| 194 | legal basetypes. */ |
| 195 | %token INT_KEYWORD INT_S2_KEYWORD LOGICAL_S1_KEYWORD LOGICAL_S2_KEYWORD |
| 196 | %token LOGICAL_KEYWORD REAL_KEYWORD REAL_S8_KEYWORD REAL_S16_KEYWORD |
| 197 | %token COMPLEX_S8_KEYWORD COMPLEX_S16_KEYWORD COMPLEX_S32_KEYWORD |
| 198 | %token BOOL_AND BOOL_OR BOOL_NOT |
| 199 | %token <lval> CHARACTER |
| 200 | |
| 201 | %token <voidval> VARIABLE |
| 202 | |
| 203 | %token <opcode> ASSIGN_MODIFY |
| 204 | |
| 205 | %left ',' |
| 206 | %left ABOVE_COMMA |
| 207 | %right '=' ASSIGN_MODIFY |
| 208 | %right '?' |
| 209 | %left BOOL_OR |
| 210 | %right BOOL_NOT |
| 211 | %left BOOL_AND |
| 212 | %left '|' |
| 213 | %left '^' |
| 214 | %left '&' |
| 215 | %left EQUAL NOTEQUAL |
| 216 | %left LESSTHAN GREATERTHAN LEQ GEQ |
| 217 | %left LSH RSH |
| 218 | %left '@' |
| 219 | %left '+' '-' |
| 220 | %left '*' '/' '%' |
| 221 | %right UNARY |
| 222 | %right '(' |
| 223 | |
| 224 | \f |
| 225 | %% |
| 226 | |
| 227 | start : exp |
| 228 | | type_exp |
| 229 | ; |
| 230 | |
| 231 | type_exp: type |
| 232 | { write_exp_elt_opcode(OP_TYPE); |
| 233 | write_exp_elt_type($1); |
| 234 | write_exp_elt_opcode(OP_TYPE); } |
| 235 | ; |
| 236 | |
| 237 | exp : '(' exp ')' |
| 238 | { } |
| 239 | ; |
| 240 | |
| 241 | /* Expressions, not including the comma operator. */ |
| 242 | exp : '*' exp %prec UNARY |
| 243 | { write_exp_elt_opcode (UNOP_IND); } |
| 244 | |
| 245 | exp : '&' exp %prec UNARY |
| 246 | { write_exp_elt_opcode (UNOP_ADDR); } |
| 247 | |
| 248 | exp : '-' exp %prec UNARY |
| 249 | { write_exp_elt_opcode (UNOP_NEG); } |
| 250 | ; |
| 251 | |
| 252 | exp : BOOL_NOT exp %prec UNARY |
| 253 | { write_exp_elt_opcode (UNOP_LOGICAL_NOT); } |
| 254 | ; |
| 255 | |
| 256 | exp : '~' exp %prec UNARY |
| 257 | { write_exp_elt_opcode (UNOP_COMPLEMENT); } |
| 258 | ; |
| 259 | |
| 260 | exp : SIZEOF exp %prec UNARY |
| 261 | { write_exp_elt_opcode (UNOP_SIZEOF); } |
| 262 | ; |
| 263 | |
| 264 | /* No more explicit array operators, we treat everything in F77 as |
| 265 | a function call. The disambiguation as to whether we are |
| 266 | doing a subscript operation or a function call is done |
| 267 | later in eval.c. */ |
| 268 | |
| 269 | exp : exp '(' |
| 270 | { start_arglist (); } |
| 271 | arglist ')' |
| 272 | { write_exp_elt_opcode (OP_F77_UNDETERMINED_ARGLIST); |
| 273 | write_exp_elt_longcst ((LONGEST) end_arglist ()); |
| 274 | write_exp_elt_opcode (OP_F77_UNDETERMINED_ARGLIST); } |
| 275 | ; |
| 276 | |
| 277 | arglist : |
| 278 | ; |
| 279 | |
| 280 | arglist : exp |
| 281 | { arglist_len = 1; } |
| 282 | ; |
| 283 | |
| 284 | arglist : substring |
| 285 | { arglist_len = 2;} |
| 286 | |
| 287 | arglist : arglist ',' exp %prec ABOVE_COMMA |
| 288 | { arglist_len++; } |
| 289 | ; |
| 290 | |
| 291 | substring: exp ':' exp %prec ABOVE_COMMA |
| 292 | { } |
| 293 | ; |
| 294 | |
| 295 | |
| 296 | complexnum: exp ',' exp |
| 297 | { } |
| 298 | ; |
| 299 | |
| 300 | exp : '(' complexnum ')' |
| 301 | { write_exp_elt_opcode(OP_COMPLEX); } |
| 302 | ; |
| 303 | |
| 304 | exp : '(' type ')' exp %prec UNARY |
| 305 | { write_exp_elt_opcode (UNOP_CAST); |
| 306 | write_exp_elt_type ($2); |
| 307 | write_exp_elt_opcode (UNOP_CAST); } |
| 308 | ; |
| 309 | |
| 310 | /* Binary operators in order of decreasing precedence. */ |
| 311 | |
| 312 | exp : exp '@' exp |
| 313 | { write_exp_elt_opcode (BINOP_REPEAT); } |
| 314 | ; |
| 315 | |
| 316 | exp : exp '*' exp |
| 317 | { write_exp_elt_opcode (BINOP_MUL); } |
| 318 | ; |
| 319 | |
| 320 | exp : exp '/' exp |
| 321 | { write_exp_elt_opcode (BINOP_DIV); } |
| 322 | ; |
| 323 | |
| 324 | exp : exp '%' exp |
| 325 | { write_exp_elt_opcode (BINOP_REM); } |
| 326 | ; |
| 327 | |
| 328 | exp : exp '+' exp |
| 329 | { write_exp_elt_opcode (BINOP_ADD); } |
| 330 | ; |
| 331 | |
| 332 | exp : exp '-' exp |
| 333 | { write_exp_elt_opcode (BINOP_SUB); } |
| 334 | ; |
| 335 | |
| 336 | exp : exp LSH exp |
| 337 | { write_exp_elt_opcode (BINOP_LSH); } |
| 338 | ; |
| 339 | |
| 340 | exp : exp RSH exp |
| 341 | { write_exp_elt_opcode (BINOP_RSH); } |
| 342 | ; |
| 343 | |
| 344 | exp : exp EQUAL exp |
| 345 | { write_exp_elt_opcode (BINOP_EQUAL); } |
| 346 | ; |
| 347 | |
| 348 | exp : exp NOTEQUAL exp |
| 349 | { write_exp_elt_opcode (BINOP_NOTEQUAL); } |
| 350 | ; |
| 351 | |
| 352 | exp : exp LEQ exp |
| 353 | { write_exp_elt_opcode (BINOP_LEQ); } |
| 354 | ; |
| 355 | |
| 356 | exp : exp GEQ exp |
| 357 | { write_exp_elt_opcode (BINOP_GEQ); } |
| 358 | ; |
| 359 | |
| 360 | exp : exp LESSTHAN exp |
| 361 | { write_exp_elt_opcode (BINOP_LESS); } |
| 362 | ; |
| 363 | |
| 364 | exp : exp GREATERTHAN exp |
| 365 | { write_exp_elt_opcode (BINOP_GTR); } |
| 366 | ; |
| 367 | |
| 368 | exp : exp '&' exp |
| 369 | { write_exp_elt_opcode (BINOP_BITWISE_AND); } |
| 370 | ; |
| 371 | |
| 372 | exp : exp '^' exp |
| 373 | { write_exp_elt_opcode (BINOP_BITWISE_XOR); } |
| 374 | ; |
| 375 | |
| 376 | exp : exp '|' exp |
| 377 | { write_exp_elt_opcode (BINOP_BITWISE_IOR); } |
| 378 | ; |
| 379 | |
| 380 | exp : exp BOOL_AND exp |
| 381 | { write_exp_elt_opcode (BINOP_LOGICAL_AND); } |
| 382 | ; |
| 383 | |
| 384 | |
| 385 | exp : exp BOOL_OR exp |
| 386 | { write_exp_elt_opcode (BINOP_LOGICAL_OR); } |
| 387 | ; |
| 388 | |
| 389 | exp : exp '=' exp |
| 390 | { write_exp_elt_opcode (BINOP_ASSIGN); } |
| 391 | ; |
| 392 | |
| 393 | exp : exp ASSIGN_MODIFY exp |
| 394 | { write_exp_elt_opcode (BINOP_ASSIGN_MODIFY); |
| 395 | write_exp_elt_opcode ($2); |
| 396 | write_exp_elt_opcode (BINOP_ASSIGN_MODIFY); } |
| 397 | ; |
| 398 | |
| 399 | exp : INT |
| 400 | { write_exp_elt_opcode (OP_LONG); |
| 401 | write_exp_elt_type ($1.type); |
| 402 | write_exp_elt_longcst ((LONGEST)($1.val)); |
| 403 | write_exp_elt_opcode (OP_LONG); } |
| 404 | ; |
| 405 | |
| 406 | exp : NAME_OR_INT |
| 407 | { YYSTYPE val; |
| 408 | parse_number ($1.stoken.ptr, $1.stoken.length, 0, &val); |
| 409 | write_exp_elt_opcode (OP_LONG); |
| 410 | write_exp_elt_type (val.typed_val.type); |
| 411 | write_exp_elt_longcst ((LONGEST)val.typed_val.val); |
| 412 | write_exp_elt_opcode (OP_LONG); } |
| 413 | ; |
| 414 | |
| 415 | exp : FLOAT |
| 416 | { write_exp_elt_opcode (OP_DOUBLE); |
| 417 | write_exp_elt_type (builtin_type_f_real_s8); |
| 418 | write_exp_elt_dblcst ($1); |
| 419 | write_exp_elt_opcode (OP_DOUBLE); } |
| 420 | ; |
| 421 | |
| 422 | exp : variable |
| 423 | ; |
| 424 | |
| 425 | exp : VARIABLE |
| 426 | ; |
| 427 | |
| 428 | exp : SIZEOF '(' type ')' %prec UNARY |
| 429 | { write_exp_elt_opcode (OP_LONG); |
| 430 | write_exp_elt_type (builtin_type_f_integer); |
| 431 | CHECK_TYPEDEF ($3); |
| 432 | write_exp_elt_longcst ((LONGEST) TYPE_LENGTH ($3)); |
| 433 | write_exp_elt_opcode (OP_LONG); } |
| 434 | ; |
| 435 | |
| 436 | exp : BOOLEAN_LITERAL |
| 437 | { write_exp_elt_opcode (OP_BOOL); |
| 438 | write_exp_elt_longcst ((LONGEST) $1); |
| 439 | write_exp_elt_opcode (OP_BOOL); |
| 440 | } |
| 441 | ; |
| 442 | |
| 443 | exp : STRING_LITERAL |
| 444 | { |
| 445 | write_exp_elt_opcode (OP_STRING); |
| 446 | write_exp_string ($1); |
| 447 | write_exp_elt_opcode (OP_STRING); |
| 448 | } |
| 449 | ; |
| 450 | |
| 451 | variable: name_not_typename |
| 452 | { struct symbol *sym = $1.sym; |
| 453 | |
| 454 | if (sym) |
| 455 | { |
| 456 | if (symbol_read_needs_frame (sym)) |
| 457 | { |
| 458 | if (innermost_block == 0 || |
| 459 | contained_in (block_found, |
| 460 | innermost_block)) |
| 461 | innermost_block = block_found; |
| 462 | } |
| 463 | write_exp_elt_opcode (OP_VAR_VALUE); |
| 464 | /* We want to use the selected frame, not |
| 465 | another more inner frame which happens to |
| 466 | be in the same block. */ |
| 467 | write_exp_elt_block (NULL); |
| 468 | write_exp_elt_sym (sym); |
| 469 | write_exp_elt_opcode (OP_VAR_VALUE); |
| 470 | break; |
| 471 | } |
| 472 | else |
| 473 | { |
| 474 | struct minimal_symbol *msymbol; |
| 475 | register char *arg = copy_name ($1.stoken); |
| 476 | |
| 477 | msymbol = |
| 478 | lookup_minimal_symbol (arg, NULL, NULL); |
| 479 | if (msymbol != NULL) |
| 480 | { |
| 481 | write_exp_msymbol (msymbol, |
| 482 | lookup_function_type (builtin_type_int), |
| 483 | builtin_type_int); |
| 484 | } |
| 485 | else if (!have_full_symbols () && !have_partial_symbols ()) |
| 486 | error ("No symbol table is loaded. Use the \"file\" command."); |
| 487 | else |
| 488 | error ("No symbol \"%s\" in current context.", |
| 489 | copy_name ($1.stoken)); |
| 490 | } |
| 491 | } |
| 492 | ; |
| 493 | |
| 494 | |
| 495 | type : ptype |
| 496 | ; |
| 497 | |
| 498 | ptype : typebase |
| 499 | | typebase abs_decl |
| 500 | { |
| 501 | /* This is where the interesting stuff happens. */ |
| 502 | int done = 0; |
| 503 | int array_size; |
| 504 | struct type *follow_type = $1; |
| 505 | struct type *range_type; |
| 506 | |
| 507 | while (!done) |
| 508 | switch (pop_type ()) |
| 509 | { |
| 510 | case tp_end: |
| 511 | done = 1; |
| 512 | break; |
| 513 | case tp_pointer: |
| 514 | follow_type = lookup_pointer_type (follow_type); |
| 515 | break; |
| 516 | case tp_reference: |
| 517 | follow_type = lookup_reference_type (follow_type); |
| 518 | break; |
| 519 | case tp_array: |
| 520 | array_size = pop_type_int (); |
| 521 | if (array_size != -1) |
| 522 | { |
| 523 | range_type = |
| 524 | create_range_type ((struct type *) NULL, |
| 525 | builtin_type_f_integer, 0, |
| 526 | array_size - 1); |
| 527 | follow_type = |
| 528 | create_array_type ((struct type *) NULL, |
| 529 | follow_type, range_type); |
| 530 | } |
| 531 | else |
| 532 | follow_type = lookup_pointer_type (follow_type); |
| 533 | break; |
| 534 | case tp_function: |
| 535 | follow_type = lookup_function_type (follow_type); |
| 536 | break; |
| 537 | } |
| 538 | $$ = follow_type; |
| 539 | } |
| 540 | ; |
| 541 | |
| 542 | abs_decl: '*' |
| 543 | { push_type (tp_pointer); $$ = 0; } |
| 544 | | '*' abs_decl |
| 545 | { push_type (tp_pointer); $$ = $2; } |
| 546 | | '&' |
| 547 | { push_type (tp_reference); $$ = 0; } |
| 548 | | '&' abs_decl |
| 549 | { push_type (tp_reference); $$ = $2; } |
| 550 | | direct_abs_decl |
| 551 | ; |
| 552 | |
| 553 | direct_abs_decl: '(' abs_decl ')' |
| 554 | { $$ = $2; } |
| 555 | | direct_abs_decl func_mod |
| 556 | { push_type (tp_function); } |
| 557 | | func_mod |
| 558 | { push_type (tp_function); } |
| 559 | ; |
| 560 | |
| 561 | func_mod: '(' ')' |
| 562 | { $$ = 0; } |
| 563 | | '(' nonempty_typelist ')' |
| 564 | { free ((PTR)$2); $$ = 0; } |
| 565 | ; |
| 566 | |
| 567 | typebase /* Implements (approximately): (type-qualifier)* type-specifier */ |
| 568 | : TYPENAME |
| 569 | { $$ = $1.type; } |
| 570 | | INT_KEYWORD |
| 571 | { $$ = builtin_type_f_integer; } |
| 572 | | INT_S2_KEYWORD |
| 573 | { $$ = builtin_type_f_integer_s2; } |
| 574 | | CHARACTER |
| 575 | { $$ = builtin_type_f_character; } |
| 576 | | LOGICAL_KEYWORD |
| 577 | { $$ = builtin_type_f_logical;} |
| 578 | | LOGICAL_S2_KEYWORD |
| 579 | { $$ = builtin_type_f_logical_s2;} |
| 580 | | LOGICAL_S1_KEYWORD |
| 581 | { $$ = builtin_type_f_logical_s1;} |
| 582 | | REAL_KEYWORD |
| 583 | { $$ = builtin_type_f_real;} |
| 584 | | REAL_S8_KEYWORD |
| 585 | { $$ = builtin_type_f_real_s8;} |
| 586 | | REAL_S16_KEYWORD |
| 587 | { $$ = builtin_type_f_real_s16;} |
| 588 | | COMPLEX_S8_KEYWORD |
| 589 | { $$ = builtin_type_f_complex_s8;} |
| 590 | | COMPLEX_S16_KEYWORD |
| 591 | { $$ = builtin_type_f_complex_s16;} |
| 592 | | COMPLEX_S32_KEYWORD |
| 593 | { $$ = builtin_type_f_complex_s32;} |
| 594 | ; |
| 595 | |
| 596 | typename: TYPENAME |
| 597 | ; |
| 598 | |
| 599 | nonempty_typelist |
| 600 | : type |
| 601 | { $$ = (struct type **) malloc (sizeof (struct type *) * 2); |
| 602 | $<ivec>$[0] = 1; /* Number of types in vector */ |
| 603 | $$[1] = $1; |
| 604 | } |
| 605 | | nonempty_typelist ',' type |
| 606 | { int len = sizeof (struct type *) * (++($<ivec>1[0]) + 1); |
| 607 | $$ = (struct type **) realloc ((char *) $1, len); |
| 608 | $$[$<ivec>$[0]] = $3; |
| 609 | } |
| 610 | ; |
| 611 | |
| 612 | name : NAME |
| 613 | { $$ = $1.stoken; } |
| 614 | | TYPENAME |
| 615 | { $$ = $1.stoken; } |
| 616 | | NAME_OR_INT |
| 617 | { $$ = $1.stoken; } |
| 618 | ; |
| 619 | |
| 620 | name_not_typename : NAME |
| 621 | /* These would be useful if name_not_typename was useful, but it is just |
| 622 | a fake for "variable", so these cause reduce/reduce conflicts because |
| 623 | the parser can't tell whether NAME_OR_INT is a name_not_typename (=variable, |
| 624 | =exp) or just an exp. If name_not_typename was ever used in an lvalue |
| 625 | context where only a name could occur, this might be useful. |
| 626 | | NAME_OR_INT |
| 627 | */ |
| 628 | ; |
| 629 | |
| 630 | %% |
| 631 | |
| 632 | /* Take care of parsing a number (anything that starts with a digit). |
| 633 | Set yylval and return the token type; update lexptr. |
| 634 | LEN is the number of characters in it. */ |
| 635 | |
| 636 | /*** Needs some error checking for the float case ***/ |
| 637 | |
| 638 | static int |
| 639 | parse_number (p, len, parsed_float, putithere) |
| 640 | register char *p; |
| 641 | register int len; |
| 642 | int parsed_float; |
| 643 | YYSTYPE *putithere; |
| 644 | { |
| 645 | register LONGEST n = 0; |
| 646 | register LONGEST prevn = 0; |
| 647 | register int c; |
| 648 | register int base = input_radix; |
| 649 | int unsigned_p = 0; |
| 650 | int long_p = 0; |
| 651 | ULONGEST high_bit; |
| 652 | struct type *signed_type; |
| 653 | struct type *unsigned_type; |
| 654 | |
| 655 | if (parsed_float) |
| 656 | { |
| 657 | /* It's a float since it contains a point or an exponent. */ |
| 658 | /* [dD] is not understood as an exponent by atof, change it to 'e'. */ |
| 659 | char *tmp, *tmp2; |
| 660 | |
| 661 | tmp = xstrdup (p); |
| 662 | for (tmp2 = tmp; *tmp2; ++tmp2) |
| 663 | if (*tmp2 == 'd' || *tmp2 == 'D') |
| 664 | *tmp2 = 'e'; |
| 665 | putithere->dval = atof (tmp); |
| 666 | free (tmp); |
| 667 | return FLOAT; |
| 668 | } |
| 669 | |
| 670 | /* Handle base-switching prefixes 0x, 0t, 0d, 0 */ |
| 671 | if (p[0] == '0') |
| 672 | switch (p[1]) |
| 673 | { |
| 674 | case 'x': |
| 675 | case 'X': |
| 676 | if (len >= 3) |
| 677 | { |
| 678 | p += 2; |
| 679 | base = 16; |
| 680 | len -= 2; |
| 681 | } |
| 682 | break; |
| 683 | |
| 684 | case 't': |
| 685 | case 'T': |
| 686 | case 'd': |
| 687 | case 'D': |
| 688 | if (len >= 3) |
| 689 | { |
| 690 | p += 2; |
| 691 | base = 10; |
| 692 | len -= 2; |
| 693 | } |
| 694 | break; |
| 695 | |
| 696 | default: |
| 697 | base = 8; |
| 698 | break; |
| 699 | } |
| 700 | |
| 701 | while (len-- > 0) |
| 702 | { |
| 703 | c = *p++; |
| 704 | if (isupper (c)) |
| 705 | c = tolower (c); |
| 706 | if (len == 0 && c == 'l') |
| 707 | long_p = 1; |
| 708 | else if (len == 0 && c == 'u') |
| 709 | unsigned_p = 1; |
| 710 | else |
| 711 | { |
| 712 | int i; |
| 713 | if (c >= '0' && c <= '9') |
| 714 | i = c - '0'; |
| 715 | else if (c >= 'a' && c <= 'f') |
| 716 | i = c - 'a' + 10; |
| 717 | else |
| 718 | return ERROR; /* Char not a digit */ |
| 719 | if (i >= base) |
| 720 | return ERROR; /* Invalid digit in this base */ |
| 721 | n *= base; |
| 722 | n += i; |
| 723 | } |
| 724 | /* Portably test for overflow (only works for nonzero values, so make |
| 725 | a second check for zero). */ |
| 726 | if ((prevn >= n) && n != 0) |
| 727 | unsigned_p=1; /* Try something unsigned */ |
| 728 | /* If range checking enabled, portably test for unsigned overflow. */ |
| 729 | if (RANGE_CHECK && n != 0) |
| 730 | { |
| 731 | if ((unsigned_p && (unsigned)prevn >= (unsigned)n)) |
| 732 | range_error("Overflow on numeric constant."); |
| 733 | } |
| 734 | prevn = n; |
| 735 | } |
| 736 | |
| 737 | /* If the number is too big to be an int, or it's got an l suffix |
| 738 | then it's a long. Work out if this has to be a long by |
| 739 | shifting right and and seeing if anything remains, and the |
| 740 | target int size is different to the target long size. |
| 741 | |
| 742 | In the expression below, we could have tested |
| 743 | (n >> TARGET_INT_BIT) |
| 744 | to see if it was zero, |
| 745 | but too many compilers warn about that, when ints and longs |
| 746 | are the same size. So we shift it twice, with fewer bits |
| 747 | each time, for the same result. */ |
| 748 | |
| 749 | if ((TARGET_INT_BIT != TARGET_LONG_BIT |
| 750 | && ((n >> 2) >> (TARGET_INT_BIT-2))) /* Avoid shift warning */ |
| 751 | || long_p) |
| 752 | { |
| 753 | high_bit = ((ULONGEST)1) << (TARGET_LONG_BIT-1); |
| 754 | unsigned_type = builtin_type_unsigned_long; |
| 755 | signed_type = builtin_type_long; |
| 756 | } |
| 757 | else |
| 758 | { |
| 759 | high_bit = ((ULONGEST)1) << (TARGET_INT_BIT-1); |
| 760 | unsigned_type = builtin_type_unsigned_int; |
| 761 | signed_type = builtin_type_int; |
| 762 | } |
| 763 | |
| 764 | putithere->typed_val.val = n; |
| 765 | |
| 766 | /* If the high bit of the worked out type is set then this number |
| 767 | has to be unsigned. */ |
| 768 | |
| 769 | if (unsigned_p || (n & high_bit)) |
| 770 | putithere->typed_val.type = unsigned_type; |
| 771 | else |
| 772 | putithere->typed_val.type = signed_type; |
| 773 | |
| 774 | return INT; |
| 775 | } |
| 776 | |
| 777 | struct token |
| 778 | { |
| 779 | char *operator; |
| 780 | int token; |
| 781 | enum exp_opcode opcode; |
| 782 | }; |
| 783 | |
| 784 | static const struct token dot_ops[] = |
| 785 | { |
| 786 | { ".and.", BOOL_AND, BINOP_END }, |
| 787 | { ".AND.", BOOL_AND, BINOP_END }, |
| 788 | { ".or.", BOOL_OR, BINOP_END }, |
| 789 | { ".OR.", BOOL_OR, BINOP_END }, |
| 790 | { ".not.", BOOL_NOT, BINOP_END }, |
| 791 | { ".NOT.", BOOL_NOT, BINOP_END }, |
| 792 | { ".eq.", EQUAL, BINOP_END }, |
| 793 | { ".EQ.", EQUAL, BINOP_END }, |
| 794 | { ".eqv.", EQUAL, BINOP_END }, |
| 795 | { ".NEQV.", NOTEQUAL, BINOP_END }, |
| 796 | { ".neqv.", NOTEQUAL, BINOP_END }, |
| 797 | { ".EQV.", EQUAL, BINOP_END }, |
| 798 | { ".ne.", NOTEQUAL, BINOP_END }, |
| 799 | { ".NE.", NOTEQUAL, BINOP_END }, |
| 800 | { ".le.", LEQ, BINOP_END }, |
| 801 | { ".LE.", LEQ, BINOP_END }, |
| 802 | { ".ge.", GEQ, BINOP_END }, |
| 803 | { ".GE.", GEQ, BINOP_END }, |
| 804 | { ".gt.", GREATERTHAN, BINOP_END }, |
| 805 | { ".GT.", GREATERTHAN, BINOP_END }, |
| 806 | { ".lt.", LESSTHAN, BINOP_END }, |
| 807 | { ".LT.", LESSTHAN, BINOP_END }, |
| 808 | { NULL, 0, 0 } |
| 809 | }; |
| 810 | |
| 811 | struct f77_boolean_val |
| 812 | { |
| 813 | char *name; |
| 814 | int value; |
| 815 | }; |
| 816 | |
| 817 | static const struct f77_boolean_val boolean_values[] = |
| 818 | { |
| 819 | { ".true.", 1 }, |
| 820 | { ".TRUE.", 1 }, |
| 821 | { ".false.", 0 }, |
| 822 | { ".FALSE.", 0 }, |
| 823 | { NULL, 0 } |
| 824 | }; |
| 825 | |
| 826 | static const struct token f77_keywords[] = |
| 827 | { |
| 828 | { "complex_16", COMPLEX_S16_KEYWORD, BINOP_END }, |
| 829 | { "complex_32", COMPLEX_S32_KEYWORD, BINOP_END }, |
| 830 | { "character", CHARACTER, BINOP_END }, |
| 831 | { "integer_2", INT_S2_KEYWORD, BINOP_END }, |
| 832 | { "logical_1", LOGICAL_S1_KEYWORD, BINOP_END }, |
| 833 | { "logical_2", LOGICAL_S2_KEYWORD, BINOP_END }, |
| 834 | { "complex_8", COMPLEX_S8_KEYWORD, BINOP_END }, |
| 835 | { "integer", INT_KEYWORD, BINOP_END }, |
| 836 | { "logical", LOGICAL_KEYWORD, BINOP_END }, |
| 837 | { "real_16", REAL_S16_KEYWORD, BINOP_END }, |
| 838 | { "complex", COMPLEX_S8_KEYWORD, BINOP_END }, |
| 839 | { "sizeof", SIZEOF, BINOP_END }, |
| 840 | { "real_8", REAL_S8_KEYWORD, BINOP_END }, |
| 841 | { "real", REAL_KEYWORD, BINOP_END }, |
| 842 | { NULL, 0, 0 } |
| 843 | }; |
| 844 | |
| 845 | /* Implementation of a dynamically expandable buffer for processing input |
| 846 | characters acquired through lexptr and building a value to return in |
| 847 | yylval. Ripped off from ch-exp.y */ |
| 848 | |
| 849 | static char *tempbuf; /* Current buffer contents */ |
| 850 | static int tempbufsize; /* Size of allocated buffer */ |
| 851 | static int tempbufindex; /* Current index into buffer */ |
| 852 | |
| 853 | #define GROWBY_MIN_SIZE 64 /* Minimum amount to grow buffer by */ |
| 854 | |
| 855 | #define CHECKBUF(size) \ |
| 856 | do { \ |
| 857 | if (tempbufindex + (size) >= tempbufsize) \ |
| 858 | { \ |
| 859 | growbuf_by_size (size); \ |
| 860 | } \ |
| 861 | } while (0); |
| 862 | |
| 863 | |
| 864 | /* Grow the static temp buffer if necessary, including allocating the first one |
| 865 | on demand. */ |
| 866 | |
| 867 | static void |
| 868 | growbuf_by_size (count) |
| 869 | int count; |
| 870 | { |
| 871 | int growby; |
| 872 | |
| 873 | growby = max (count, GROWBY_MIN_SIZE); |
| 874 | tempbufsize += growby; |
| 875 | if (tempbuf == NULL) |
| 876 | tempbuf = (char *) malloc (tempbufsize); |
| 877 | else |
| 878 | tempbuf = (char *) realloc (tempbuf, tempbufsize); |
| 879 | } |
| 880 | |
| 881 | /* Blatantly ripped off from ch-exp.y. This routine recognizes F77 |
| 882 | string-literals. |
| 883 | |
| 884 | Recognize a string literal. A string literal is a nonzero sequence |
| 885 | of characters enclosed in matching single quotes, except that |
| 886 | a single character inside single quotes is a character literal, which |
| 887 | we reject as a string literal. To embed the terminator character inside |
| 888 | a string, it is simply doubled (I.E. 'this''is''one''string') */ |
| 889 | |
| 890 | static int |
| 891 | match_string_literal () |
| 892 | { |
| 893 | char *tokptr = lexptr; |
| 894 | |
| 895 | for (tempbufindex = 0, tokptr++; *tokptr != '\0'; tokptr++) |
| 896 | { |
| 897 | CHECKBUF (1); |
| 898 | if (*tokptr == *lexptr) |
| 899 | { |
| 900 | if (*(tokptr + 1) == *lexptr) |
| 901 | tokptr++; |
| 902 | else |
| 903 | break; |
| 904 | } |
| 905 | tempbuf[tempbufindex++] = *tokptr; |
| 906 | } |
| 907 | if (*tokptr == '\0' /* no terminator */ |
| 908 | || tempbufindex == 0) /* no string */ |
| 909 | return 0; |
| 910 | else |
| 911 | { |
| 912 | tempbuf[tempbufindex] = '\0'; |
| 913 | yylval.sval.ptr = tempbuf; |
| 914 | yylval.sval.length = tempbufindex; |
| 915 | lexptr = ++tokptr; |
| 916 | return STRING_LITERAL; |
| 917 | } |
| 918 | } |
| 919 | |
| 920 | /* Read one token, getting characters through lexptr. */ |
| 921 | |
| 922 | static int |
| 923 | yylex () |
| 924 | { |
| 925 | int c; |
| 926 | int namelen; |
| 927 | unsigned int i,token; |
| 928 | char *tokstart; |
| 929 | |
| 930 | retry: |
| 931 | |
| 932 | prev_lexptr = lexptr; |
| 933 | |
| 934 | tokstart = lexptr; |
| 935 | |
| 936 | /* First of all, let us make sure we are not dealing with the |
| 937 | special tokens .true. and .false. which evaluate to 1 and 0. */ |
| 938 | |
| 939 | if (*lexptr == '.') |
| 940 | { |
| 941 | for (i = 0; boolean_values[i].name != NULL; i++) |
| 942 | { |
| 943 | if STREQN (tokstart, boolean_values[i].name, |
| 944 | strlen (boolean_values[i].name)) |
| 945 | { |
| 946 | lexptr += strlen (boolean_values[i].name); |
| 947 | yylval.lval = boolean_values[i].value; |
| 948 | return BOOLEAN_LITERAL; |
| 949 | } |
| 950 | } |
| 951 | } |
| 952 | |
| 953 | /* See if it is a special .foo. operator */ |
| 954 | |
| 955 | for (i = 0; dot_ops[i].operator != NULL; i++) |
| 956 | if (STREQN (tokstart, dot_ops[i].operator, strlen (dot_ops[i].operator))) |
| 957 | { |
| 958 | lexptr += strlen (dot_ops[i].operator); |
| 959 | yylval.opcode = dot_ops[i].opcode; |
| 960 | return dot_ops[i].token; |
| 961 | } |
| 962 | |
| 963 | switch (c = *tokstart) |
| 964 | { |
| 965 | case 0: |
| 966 | return 0; |
| 967 | |
| 968 | case ' ': |
| 969 | case '\t': |
| 970 | case '\n': |
| 971 | lexptr++; |
| 972 | goto retry; |
| 973 | |
| 974 | case '\'': |
| 975 | token = match_string_literal (); |
| 976 | if (token != 0) |
| 977 | return (token); |
| 978 | break; |
| 979 | |
| 980 | case '(': |
| 981 | paren_depth++; |
| 982 | lexptr++; |
| 983 | return c; |
| 984 | |
| 985 | case ')': |
| 986 | if (paren_depth == 0) |
| 987 | return 0; |
| 988 | paren_depth--; |
| 989 | lexptr++; |
| 990 | return c; |
| 991 | |
| 992 | case ',': |
| 993 | if (comma_terminates && paren_depth == 0) |
| 994 | return 0; |
| 995 | lexptr++; |
| 996 | return c; |
| 997 | |
| 998 | case '.': |
| 999 | /* Might be a floating point number. */ |
| 1000 | if (lexptr[1] < '0' || lexptr[1] > '9') |
| 1001 | goto symbol; /* Nope, must be a symbol. */ |
| 1002 | /* FALL THRU into number case. */ |
| 1003 | |
| 1004 | case '0': |
| 1005 | case '1': |
| 1006 | case '2': |
| 1007 | case '3': |
| 1008 | case '4': |
| 1009 | case '5': |
| 1010 | case '6': |
| 1011 | case '7': |
| 1012 | case '8': |
| 1013 | case '9': |
| 1014 | { |
| 1015 | /* It's a number. */ |
| 1016 | int got_dot = 0, got_e = 0, got_d = 0, toktype; |
| 1017 | register char *p = tokstart; |
| 1018 | int hex = input_radix > 10; |
| 1019 | |
| 1020 | if (c == '0' && (p[1] == 'x' || p[1] == 'X')) |
| 1021 | { |
| 1022 | p += 2; |
| 1023 | hex = 1; |
| 1024 | } |
| 1025 | else if (c == '0' && (p[1]=='t' || p[1]=='T' || p[1]=='d' || p[1]=='D')) |
| 1026 | { |
| 1027 | p += 2; |
| 1028 | hex = 0; |
| 1029 | } |
| 1030 | |
| 1031 | for (;; ++p) |
| 1032 | { |
| 1033 | if (!hex && !got_e && (*p == 'e' || *p == 'E')) |
| 1034 | got_dot = got_e = 1; |
| 1035 | else if (!hex && !got_d && (*p == 'd' || *p == 'D')) |
| 1036 | got_dot = got_d = 1; |
| 1037 | else if (!hex && !got_dot && *p == '.') |
| 1038 | got_dot = 1; |
| 1039 | else if (((got_e && (p[-1] == 'e' || p[-1] == 'E')) |
| 1040 | || (got_d && (p[-1] == 'd' || p[-1] == 'D'))) |
| 1041 | && (*p == '-' || *p == '+')) |
| 1042 | /* This is the sign of the exponent, not the end of the |
| 1043 | number. */ |
| 1044 | continue; |
| 1045 | /* We will take any letters or digits. parse_number will |
| 1046 | complain if past the radix, or if L or U are not final. */ |
| 1047 | else if ((*p < '0' || *p > '9') |
| 1048 | && ((*p < 'a' || *p > 'z') |
| 1049 | && (*p < 'A' || *p > 'Z'))) |
| 1050 | break; |
| 1051 | } |
| 1052 | toktype = parse_number (tokstart, p - tokstart, got_dot|got_e|got_d, |
| 1053 | &yylval); |
| 1054 | if (toktype == ERROR) |
| 1055 | { |
| 1056 | char *err_copy = (char *) alloca (p - tokstart + 1); |
| 1057 | |
| 1058 | memcpy (err_copy, tokstart, p - tokstart); |
| 1059 | err_copy[p - tokstart] = 0; |
| 1060 | error ("Invalid number \"%s\".", err_copy); |
| 1061 | } |
| 1062 | lexptr = p; |
| 1063 | return toktype; |
| 1064 | } |
| 1065 | |
| 1066 | case '+': |
| 1067 | case '-': |
| 1068 | case '*': |
| 1069 | case '/': |
| 1070 | case '%': |
| 1071 | case '|': |
| 1072 | case '&': |
| 1073 | case '^': |
| 1074 | case '~': |
| 1075 | case '!': |
| 1076 | case '@': |
| 1077 | case '<': |
| 1078 | case '>': |
| 1079 | case '[': |
| 1080 | case ']': |
| 1081 | case '?': |
| 1082 | case ':': |
| 1083 | case '=': |
| 1084 | case '{': |
| 1085 | case '}': |
| 1086 | symbol: |
| 1087 | lexptr++; |
| 1088 | return c; |
| 1089 | } |
| 1090 | |
| 1091 | if (!(c == '_' || c == '$' |
| 1092 | || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))) |
| 1093 | /* We must have come across a bad character (e.g. ';'). */ |
| 1094 | error ("Invalid character '%c' in expression.", c); |
| 1095 | |
| 1096 | namelen = 0; |
| 1097 | for (c = tokstart[namelen]; |
| 1098 | (c == '_' || c == '$' || (c >= '0' && c <= '9') |
| 1099 | || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')); |
| 1100 | c = tokstart[++namelen]); |
| 1101 | |
| 1102 | /* The token "if" terminates the expression and is NOT |
| 1103 | removed from the input stream. */ |
| 1104 | |
| 1105 | if (namelen == 2 && tokstart[0] == 'i' && tokstart[1] == 'f') |
| 1106 | return 0; |
| 1107 | |
| 1108 | lexptr += namelen; |
| 1109 | |
| 1110 | /* Catch specific keywords. */ |
| 1111 | |
| 1112 | for (i = 0; f77_keywords[i].operator != NULL; i++) |
| 1113 | if (STREQN(tokstart, f77_keywords[i].operator, |
| 1114 | strlen(f77_keywords[i].operator))) |
| 1115 | { |
| 1116 | /* lexptr += strlen(f77_keywords[i].operator); */ |
| 1117 | yylval.opcode = f77_keywords[i].opcode; |
| 1118 | return f77_keywords[i].token; |
| 1119 | } |
| 1120 | |
| 1121 | yylval.sval.ptr = tokstart; |
| 1122 | yylval.sval.length = namelen; |
| 1123 | |
| 1124 | if (*tokstart == '$') |
| 1125 | { |
| 1126 | write_dollar_variable (yylval.sval); |
| 1127 | return VARIABLE; |
| 1128 | } |
| 1129 | |
| 1130 | /* Use token-type TYPENAME for symbols that happen to be defined |
| 1131 | currently as names of types; NAME for other symbols. |
| 1132 | The caller is not constrained to care about the distinction. */ |
| 1133 | { |
| 1134 | char *tmp = copy_name (yylval.sval); |
| 1135 | struct symbol *sym; |
| 1136 | int is_a_field_of_this = 0; |
| 1137 | int hextype; |
| 1138 | |
| 1139 | sym = lookup_symbol (tmp, expression_context_block, |
| 1140 | VAR_NAMESPACE, |
| 1141 | current_language->la_language == language_cplus |
| 1142 | ? &is_a_field_of_this : NULL, |
| 1143 | NULL); |
| 1144 | if (sym && SYMBOL_CLASS (sym) == LOC_TYPEDEF) |
| 1145 | { |
| 1146 | yylval.tsym.type = SYMBOL_TYPE (sym); |
| 1147 | return TYPENAME; |
| 1148 | } |
| 1149 | if ((yylval.tsym.type = lookup_primitive_typename (tmp)) != 0) |
| 1150 | return TYPENAME; |
| 1151 | |
| 1152 | /* Input names that aren't symbols but ARE valid hex numbers, |
| 1153 | when the input radix permits them, can be names or numbers |
| 1154 | depending on the parse. Note we support radixes > 16 here. */ |
| 1155 | if (!sym |
| 1156 | && ((tokstart[0] >= 'a' && tokstart[0] < 'a' + input_radix - 10) |
| 1157 | || (tokstart[0] >= 'A' && tokstart[0] < 'A' + input_radix - 10))) |
| 1158 | { |
| 1159 | YYSTYPE newlval; /* Its value is ignored. */ |
| 1160 | hextype = parse_number (tokstart, namelen, 0, &newlval); |
| 1161 | if (hextype == INT) |
| 1162 | { |
| 1163 | yylval.ssym.sym = sym; |
| 1164 | yylval.ssym.is_a_field_of_this = is_a_field_of_this; |
| 1165 | return NAME_OR_INT; |
| 1166 | } |
| 1167 | } |
| 1168 | |
| 1169 | /* Any other kind of symbol */ |
| 1170 | yylval.ssym.sym = sym; |
| 1171 | yylval.ssym.is_a_field_of_this = is_a_field_of_this; |
| 1172 | return NAME; |
| 1173 | } |
| 1174 | } |
| 1175 | |
| 1176 | void |
| 1177 | yyerror (msg) |
| 1178 | char *msg; |
| 1179 | { |
| 1180 | if (prev_lexptr) |
| 1181 | lexptr = prev_lexptr; |
| 1182 | |
| 1183 | error ("A %s in expression, near `%s'.", (msg ? msg : "error"), lexptr); |
| 1184 | } |