Commit | Line | Data |
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c906108c | 1 | /* YACC parser for C expressions, for GDB. |
197e01b6 | 2 | Copyright (C) 1986, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, |
0fb0cc75 | 3 | 1998, 1999, 2000, 2003, 2004, 2006, 2007, 2008, 2009 |
9b254dd1 | 4 | Free Software Foundation, Inc. |
c906108c | 5 | |
5b1ba0e5 | 6 | This file is part of GDB. |
c906108c | 7 | |
5b1ba0e5 NS |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 3 of the License, or | |
11 | (at your option) any later version. | |
c906108c | 12 | |
5b1ba0e5 NS |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
c906108c | 17 | |
5b1ba0e5 NS |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
c906108c SS |
20 | |
21 | /* Parse a C expression from text in a string, | |
22 | and return the result as a struct expression pointer. | |
23 | That structure contains arithmetic operations in reverse polish, | |
24 | with constants represented by operations that are followed by special data. | |
25 | See expression.h for the details of the format. | |
26 | What is important here is that it can be built up sequentially | |
27 | during the process of parsing; the lower levels of the tree always | |
28 | come first in the result. | |
29 | ||
30 | Note that malloc's and realloc's in this file are transformed to | |
31 | xmalloc and xrealloc respectively by the same sed command in the | |
32 | makefile that remaps any other malloc/realloc inserted by the parser | |
33 | generator. Doing this with #defines and trying to control the interaction | |
34 | with include files (<malloc.h> and <stdlib.h> for example) just became | |
35 | too messy, particularly when such includes can be inserted at random | |
36 | times by the parser generator. */ | |
37 | ||
38 | %{ | |
39 | ||
40 | #include "defs.h" | |
41 | #include "gdb_string.h" | |
42 | #include <ctype.h> | |
43 | #include "expression.h" | |
44 | #include "value.h" | |
45 | #include "parser-defs.h" | |
46 | #include "language.h" | |
47 | #include "c-lang.h" | |
48 | #include "bfd.h" /* Required by objfiles.h. */ | |
49 | #include "symfile.h" /* Required by objfiles.h. */ | |
50 | #include "objfiles.h" /* For have_full_symbols and have_partial_symbols */ | |
234b45d4 | 51 | #include "charset.h" |
fe898f56 | 52 | #include "block.h" |
79c2c32d | 53 | #include "cp-support.h" |
27bc4d80 | 54 | #include "dfp.h" |
7c8adf68 TT |
55 | #include "gdb_assert.h" |
56 | #include "macroscope.h" | |
c906108c | 57 | |
3e79cecf UW |
58 | #define parse_type builtin_type (parse_gdbarch) |
59 | ||
c906108c SS |
60 | /* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc), |
61 | as well as gratuitiously global symbol names, so we can have multiple | |
62 | yacc generated parsers in gdb. Note that these are only the variables | |
63 | produced by yacc. If other parser generators (bison, byacc, etc) produce | |
64 | additional global names that conflict at link time, then those parser | |
65 | generators need to be fixed instead of adding those names to this list. */ | |
66 | ||
67 | #define yymaxdepth c_maxdepth | |
65d12d83 | 68 | #define yyparse c_parse_internal |
c906108c SS |
69 | #define yylex c_lex |
70 | #define yyerror c_error | |
71 | #define yylval c_lval | |
72 | #define yychar c_char | |
73 | #define yydebug c_debug | |
74 | #define yypact c_pact | |
75 | #define yyr1 c_r1 | |
76 | #define yyr2 c_r2 | |
77 | #define yydef c_def | |
78 | #define yychk c_chk | |
79 | #define yypgo c_pgo | |
80 | #define yyact c_act | |
81 | #define yyexca c_exca | |
82 | #define yyerrflag c_errflag | |
83 | #define yynerrs c_nerrs | |
84 | #define yyps c_ps | |
85 | #define yypv c_pv | |
86 | #define yys c_s | |
87 | #define yy_yys c_yys | |
88 | #define yystate c_state | |
89 | #define yytmp c_tmp | |
90 | #define yyv c_v | |
91 | #define yy_yyv c_yyv | |
92 | #define yyval c_val | |
93 | #define yylloc c_lloc | |
94 | #define yyreds c_reds /* With YYDEBUG defined */ | |
95 | #define yytoks c_toks /* With YYDEBUG defined */ | |
06891d83 JT |
96 | #define yyname c_name /* With YYDEBUG defined */ |
97 | #define yyrule c_rule /* With YYDEBUG defined */ | |
c906108c SS |
98 | #define yylhs c_yylhs |
99 | #define yylen c_yylen | |
100 | #define yydefred c_yydefred | |
101 | #define yydgoto c_yydgoto | |
102 | #define yysindex c_yysindex | |
103 | #define yyrindex c_yyrindex | |
104 | #define yygindex c_yygindex | |
105 | #define yytable c_yytable | |
106 | #define yycheck c_yycheck | |
107 | ||
108 | #ifndef YYDEBUG | |
f461f5cf | 109 | #define YYDEBUG 1 /* Default to yydebug support */ |
c906108c SS |
110 | #endif |
111 | ||
f461f5cf PM |
112 | #define YYFPRINTF parser_fprintf |
113 | ||
a14ed312 | 114 | int yyparse (void); |
c906108c | 115 | |
a14ed312 | 116 | static int yylex (void); |
c906108c | 117 | |
a14ed312 | 118 | void yyerror (char *); |
c906108c SS |
119 | |
120 | %} | |
121 | ||
122 | /* Although the yacc "value" of an expression is not used, | |
123 | since the result is stored in the structure being created, | |
124 | other node types do have values. */ | |
125 | ||
126 | %union | |
127 | { | |
128 | LONGEST lval; | |
129 | struct { | |
130 | LONGEST val; | |
131 | struct type *type; | |
132 | } typed_val_int; | |
133 | struct { | |
134 | DOUBLEST dval; | |
135 | struct type *type; | |
136 | } typed_val_float; | |
27bc4d80 TJB |
137 | struct { |
138 | gdb_byte val[16]; | |
139 | struct type *type; | |
140 | } typed_val_decfloat; | |
c906108c SS |
141 | struct symbol *sym; |
142 | struct type *tval; | |
143 | struct stoken sval; | |
6c7a06a3 | 144 | struct typed_stoken tsval; |
c906108c SS |
145 | struct ttype tsym; |
146 | struct symtoken ssym; | |
147 | int voidval; | |
148 | struct block *bval; | |
149 | enum exp_opcode opcode; | |
150 | struct internalvar *ivar; | |
151 | ||
6c7a06a3 | 152 | struct stoken_vector svec; |
c906108c SS |
153 | struct type **tvec; |
154 | int *ivec; | |
155 | } | |
156 | ||
157 | %{ | |
158 | /* YYSTYPE gets defined by %union */ | |
a14ed312 | 159 | static int parse_number (char *, int, int, YYSTYPE *); |
66c53f2b | 160 | static struct stoken operator_stoken (const char *); |
c906108c SS |
161 | %} |
162 | ||
163 | %type <voidval> exp exp1 type_exp start variable qualified_name lcurly | |
164 | %type <lval> rcurly | |
79c2c32d | 165 | %type <tval> type typebase qualified_type |
c906108c SS |
166 | %type <tvec> nonempty_typelist |
167 | /* %type <bval> block */ | |
168 | ||
169 | /* Fancy type parsing. */ | |
170 | %type <voidval> func_mod direct_abs_decl abs_decl | |
171 | %type <tval> ptype | |
172 | %type <lval> array_mod | |
173 | ||
174 | %token <typed_val_int> INT | |
175 | %token <typed_val_float> FLOAT | |
27bc4d80 | 176 | %token <typed_val_decfloat> DECFLOAT |
c906108c SS |
177 | |
178 | /* Both NAME and TYPENAME tokens represent symbols in the input, | |
179 | and both convey their data as strings. | |
180 | But a TYPENAME is a string that happens to be defined as a typedef | |
181 | or builtin type name (such as int or char) | |
182 | and a NAME is any other symbol. | |
183 | Contexts where this distinction is not important can use the | |
184 | nonterminal "name", which matches either NAME or TYPENAME. */ | |
185 | ||
6c7a06a3 TT |
186 | %token <tsval> STRING |
187 | %token <tsval> CHAR | |
c906108c | 188 | %token <ssym> NAME /* BLOCKNAME defined below to give it higher precedence. */ |
65d12d83 | 189 | %token <voidval> COMPLETE |
c906108c | 190 | %token <tsym> TYPENAME |
6c7a06a3 TT |
191 | %type <sval> name |
192 | %type <svec> string_exp | |
c906108c SS |
193 | %type <ssym> name_not_typename |
194 | %type <tsym> typename | |
195 | ||
196 | /* A NAME_OR_INT is a symbol which is not known in the symbol table, | |
197 | but which would parse as a valid number in the current input radix. | |
198 | E.g. "c" when input_radix==16. Depending on the parse, it will be | |
199 | turned into a name or into a number. */ | |
200 | ||
201 | %token <ssym> NAME_OR_INT | |
202 | ||
66c53f2b | 203 | %token OPERATOR |
c906108c SS |
204 | %token STRUCT CLASS UNION ENUM SIZEOF UNSIGNED COLONCOLON |
205 | %token TEMPLATE | |
206 | %token ERROR | |
66c53f2b KS |
207 | %token NEW DELETE |
208 | %type <sval> operator | |
c906108c SS |
209 | |
210 | /* Special type cases, put in to allow the parser to distinguish different | |
211 | legal basetypes. */ | |
212 | %token SIGNED_KEYWORD LONG SHORT INT_KEYWORD CONST_KEYWORD VOLATILE_KEYWORD DOUBLE_KEYWORD | |
213 | ||
214 | %token <voidval> VARIABLE | |
215 | ||
216 | %token <opcode> ASSIGN_MODIFY | |
217 | ||
218 | /* C++ */ | |
c906108c SS |
219 | %token TRUEKEYWORD |
220 | %token FALSEKEYWORD | |
221 | ||
222 | ||
223 | %left ',' | |
224 | %left ABOVE_COMMA | |
225 | %right '=' ASSIGN_MODIFY | |
226 | %right '?' | |
227 | %left OROR | |
228 | %left ANDAND | |
229 | %left '|' | |
230 | %left '^' | |
231 | %left '&' | |
232 | %left EQUAL NOTEQUAL | |
233 | %left '<' '>' LEQ GEQ | |
234 | %left LSH RSH | |
235 | %left '@' | |
236 | %left '+' '-' | |
237 | %left '*' '/' '%' | |
238 | %right UNARY INCREMENT DECREMENT | |
c1af96a0 | 239 | %right ARROW ARROW_STAR '.' DOT_STAR '[' '(' |
c906108c SS |
240 | %token <ssym> BLOCKNAME |
241 | %token <bval> FILENAME | |
242 | %type <bval> block | |
243 | %left COLONCOLON | |
244 | ||
245 | \f | |
246 | %% | |
247 | ||
248 | start : exp1 | |
249 | | type_exp | |
250 | ; | |
251 | ||
252 | type_exp: type | |
253 | { write_exp_elt_opcode(OP_TYPE); | |
254 | write_exp_elt_type($1); | |
255 | write_exp_elt_opcode(OP_TYPE);} | |
256 | ; | |
257 | ||
258 | /* Expressions, including the comma operator. */ | |
259 | exp1 : exp | |
260 | | exp1 ',' exp | |
261 | { write_exp_elt_opcode (BINOP_COMMA); } | |
262 | ; | |
263 | ||
264 | /* Expressions, not including the comma operator. */ | |
265 | exp : '*' exp %prec UNARY | |
266 | { write_exp_elt_opcode (UNOP_IND); } | |
ef944135 | 267 | ; |
c906108c SS |
268 | |
269 | exp : '&' exp %prec UNARY | |
270 | { write_exp_elt_opcode (UNOP_ADDR); } | |
ef944135 | 271 | ; |
c906108c SS |
272 | |
273 | exp : '-' exp %prec UNARY | |
274 | { write_exp_elt_opcode (UNOP_NEG); } | |
275 | ; | |
276 | ||
36e9969c NS |
277 | exp : '+' exp %prec UNARY |
278 | { write_exp_elt_opcode (UNOP_PLUS); } | |
279 | ; | |
280 | ||
c906108c SS |
281 | exp : '!' exp %prec UNARY |
282 | { write_exp_elt_opcode (UNOP_LOGICAL_NOT); } | |
283 | ; | |
284 | ||
285 | exp : '~' exp %prec UNARY | |
286 | { write_exp_elt_opcode (UNOP_COMPLEMENT); } | |
287 | ; | |
288 | ||
289 | exp : INCREMENT exp %prec UNARY | |
290 | { write_exp_elt_opcode (UNOP_PREINCREMENT); } | |
291 | ; | |
292 | ||
293 | exp : DECREMENT exp %prec UNARY | |
294 | { write_exp_elt_opcode (UNOP_PREDECREMENT); } | |
295 | ; | |
296 | ||
297 | exp : exp INCREMENT %prec UNARY | |
298 | { write_exp_elt_opcode (UNOP_POSTINCREMENT); } | |
299 | ; | |
300 | ||
301 | exp : exp DECREMENT %prec UNARY | |
302 | { write_exp_elt_opcode (UNOP_POSTDECREMENT); } | |
303 | ; | |
304 | ||
305 | exp : SIZEOF exp %prec UNARY | |
306 | { write_exp_elt_opcode (UNOP_SIZEOF); } | |
307 | ; | |
308 | ||
309 | exp : exp ARROW name | |
310 | { write_exp_elt_opcode (STRUCTOP_PTR); | |
311 | write_exp_string ($3); | |
312 | write_exp_elt_opcode (STRUCTOP_PTR); } | |
313 | ; | |
314 | ||
65d12d83 TT |
315 | exp : exp ARROW name COMPLETE |
316 | { mark_struct_expression (); | |
317 | write_exp_elt_opcode (STRUCTOP_PTR); | |
318 | write_exp_string ($3); | |
319 | write_exp_elt_opcode (STRUCTOP_PTR); } | |
320 | ; | |
321 | ||
322 | exp : exp ARROW COMPLETE | |
323 | { struct stoken s; | |
324 | mark_struct_expression (); | |
325 | write_exp_elt_opcode (STRUCTOP_PTR); | |
326 | s.ptr = ""; | |
327 | s.length = 0; | |
328 | write_exp_string (s); | |
329 | write_exp_elt_opcode (STRUCTOP_PTR); } | |
330 | ; | |
331 | ||
c906108c SS |
332 | exp : exp ARROW qualified_name |
333 | { /* exp->type::name becomes exp->*(&type::name) */ | |
334 | /* Note: this doesn't work if name is a | |
335 | static member! FIXME */ | |
336 | write_exp_elt_opcode (UNOP_ADDR); | |
337 | write_exp_elt_opcode (STRUCTOP_MPTR); } | |
338 | ; | |
339 | ||
c1af96a0 | 340 | exp : exp ARROW_STAR exp |
c906108c SS |
341 | { write_exp_elt_opcode (STRUCTOP_MPTR); } |
342 | ; | |
343 | ||
344 | exp : exp '.' name | |
345 | { write_exp_elt_opcode (STRUCTOP_STRUCT); | |
346 | write_exp_string ($3); | |
347 | write_exp_elt_opcode (STRUCTOP_STRUCT); } | |
348 | ; | |
349 | ||
65d12d83 TT |
350 | exp : exp '.' name COMPLETE |
351 | { mark_struct_expression (); | |
352 | write_exp_elt_opcode (STRUCTOP_STRUCT); | |
353 | write_exp_string ($3); | |
354 | write_exp_elt_opcode (STRUCTOP_STRUCT); } | |
355 | ; | |
356 | ||
357 | exp : exp '.' COMPLETE | |
358 | { struct stoken s; | |
359 | mark_struct_expression (); | |
360 | write_exp_elt_opcode (STRUCTOP_STRUCT); | |
361 | s.ptr = ""; | |
362 | s.length = 0; | |
363 | write_exp_string (s); | |
364 | write_exp_elt_opcode (STRUCTOP_STRUCT); } | |
365 | ; | |
366 | ||
c906108c SS |
367 | exp : exp '.' qualified_name |
368 | { /* exp.type::name becomes exp.*(&type::name) */ | |
369 | /* Note: this doesn't work if name is a | |
370 | static member! FIXME */ | |
371 | write_exp_elt_opcode (UNOP_ADDR); | |
372 | write_exp_elt_opcode (STRUCTOP_MEMBER); } | |
373 | ; | |
374 | ||
c1af96a0 | 375 | exp : exp DOT_STAR exp |
c906108c SS |
376 | { write_exp_elt_opcode (STRUCTOP_MEMBER); } |
377 | ; | |
378 | ||
379 | exp : exp '[' exp1 ']' | |
380 | { write_exp_elt_opcode (BINOP_SUBSCRIPT); } | |
381 | ; | |
382 | ||
383 | exp : exp '(' | |
384 | /* This is to save the value of arglist_len | |
385 | being accumulated by an outer function call. */ | |
386 | { start_arglist (); } | |
387 | arglist ')' %prec ARROW | |
388 | { write_exp_elt_opcode (OP_FUNCALL); | |
389 | write_exp_elt_longcst ((LONGEST) end_arglist ()); | |
390 | write_exp_elt_opcode (OP_FUNCALL); } | |
391 | ; | |
392 | ||
393 | lcurly : '{' | |
394 | { start_arglist (); } | |
395 | ; | |
396 | ||
397 | arglist : | |
398 | ; | |
399 | ||
400 | arglist : exp | |
401 | { arglist_len = 1; } | |
402 | ; | |
403 | ||
404 | arglist : arglist ',' exp %prec ABOVE_COMMA | |
405 | { arglist_len++; } | |
406 | ; | |
407 | ||
072bba3b KS |
408 | exp : exp '(' nonempty_typelist ')' const_or_volatile |
409 | { int i; | |
410 | write_exp_elt_opcode (TYPE_INSTANCE); | |
411 | write_exp_elt_longcst ((LONGEST) $<ivec>3[0]); | |
412 | for (i = 0; i < $<ivec>3[0]; ++i) | |
413 | write_exp_elt_type ($<tvec>3[i + 1]); | |
414 | write_exp_elt_longcst((LONGEST) $<ivec>3[0]); | |
415 | write_exp_elt_opcode (TYPE_INSTANCE); | |
416 | free ($3); | |
417 | } | |
418 | ; | |
419 | ||
c906108c SS |
420 | rcurly : '}' |
421 | { $$ = end_arglist () - 1; } | |
422 | ; | |
423 | exp : lcurly arglist rcurly %prec ARROW | |
424 | { write_exp_elt_opcode (OP_ARRAY); | |
425 | write_exp_elt_longcst ((LONGEST) 0); | |
426 | write_exp_elt_longcst ((LONGEST) $3); | |
427 | write_exp_elt_opcode (OP_ARRAY); } | |
428 | ; | |
429 | ||
430 | exp : lcurly type rcurly exp %prec UNARY | |
431 | { write_exp_elt_opcode (UNOP_MEMVAL); | |
432 | write_exp_elt_type ($2); | |
433 | write_exp_elt_opcode (UNOP_MEMVAL); } | |
434 | ; | |
435 | ||
436 | exp : '(' type ')' exp %prec UNARY | |
437 | { write_exp_elt_opcode (UNOP_CAST); | |
438 | write_exp_elt_type ($2); | |
439 | write_exp_elt_opcode (UNOP_CAST); } | |
440 | ; | |
441 | ||
442 | exp : '(' exp1 ')' | |
443 | { } | |
444 | ; | |
445 | ||
446 | /* Binary operators in order of decreasing precedence. */ | |
447 | ||
448 | exp : exp '@' exp | |
449 | { write_exp_elt_opcode (BINOP_REPEAT); } | |
450 | ; | |
451 | ||
452 | exp : exp '*' exp | |
453 | { write_exp_elt_opcode (BINOP_MUL); } | |
454 | ; | |
455 | ||
456 | exp : exp '/' exp | |
457 | { write_exp_elt_opcode (BINOP_DIV); } | |
458 | ; | |
459 | ||
460 | exp : exp '%' exp | |
461 | { write_exp_elt_opcode (BINOP_REM); } | |
462 | ; | |
463 | ||
464 | exp : exp '+' exp | |
465 | { write_exp_elt_opcode (BINOP_ADD); } | |
466 | ; | |
467 | ||
468 | exp : exp '-' exp | |
469 | { write_exp_elt_opcode (BINOP_SUB); } | |
470 | ; | |
471 | ||
472 | exp : exp LSH exp | |
473 | { write_exp_elt_opcode (BINOP_LSH); } | |
474 | ; | |
475 | ||
476 | exp : exp RSH exp | |
477 | { write_exp_elt_opcode (BINOP_RSH); } | |
478 | ; | |
479 | ||
480 | exp : exp EQUAL exp | |
481 | { write_exp_elt_opcode (BINOP_EQUAL); } | |
482 | ; | |
483 | ||
484 | exp : exp NOTEQUAL exp | |
485 | { write_exp_elt_opcode (BINOP_NOTEQUAL); } | |
486 | ; | |
487 | ||
488 | exp : exp LEQ exp | |
489 | { write_exp_elt_opcode (BINOP_LEQ); } | |
490 | ; | |
491 | ||
492 | exp : exp GEQ exp | |
493 | { write_exp_elt_opcode (BINOP_GEQ); } | |
494 | ; | |
495 | ||
496 | exp : exp '<' exp | |
497 | { write_exp_elt_opcode (BINOP_LESS); } | |
498 | ; | |
499 | ||
500 | exp : exp '>' exp | |
501 | { write_exp_elt_opcode (BINOP_GTR); } | |
502 | ; | |
503 | ||
504 | exp : exp '&' exp | |
505 | { write_exp_elt_opcode (BINOP_BITWISE_AND); } | |
506 | ; | |
507 | ||
508 | exp : exp '^' exp | |
509 | { write_exp_elt_opcode (BINOP_BITWISE_XOR); } | |
510 | ; | |
511 | ||
512 | exp : exp '|' exp | |
513 | { write_exp_elt_opcode (BINOP_BITWISE_IOR); } | |
514 | ; | |
515 | ||
516 | exp : exp ANDAND exp | |
517 | { write_exp_elt_opcode (BINOP_LOGICAL_AND); } | |
518 | ; | |
519 | ||
520 | exp : exp OROR exp | |
521 | { write_exp_elt_opcode (BINOP_LOGICAL_OR); } | |
522 | ; | |
523 | ||
524 | exp : exp '?' exp ':' exp %prec '?' | |
525 | { write_exp_elt_opcode (TERNOP_COND); } | |
526 | ; | |
527 | ||
528 | exp : exp '=' exp | |
529 | { write_exp_elt_opcode (BINOP_ASSIGN); } | |
530 | ; | |
531 | ||
532 | exp : exp ASSIGN_MODIFY exp | |
533 | { write_exp_elt_opcode (BINOP_ASSIGN_MODIFY); | |
534 | write_exp_elt_opcode ($2); | |
535 | write_exp_elt_opcode (BINOP_ASSIGN_MODIFY); } | |
536 | ; | |
537 | ||
538 | exp : INT | |
539 | { write_exp_elt_opcode (OP_LONG); | |
540 | write_exp_elt_type ($1.type); | |
541 | write_exp_elt_longcst ((LONGEST)($1.val)); | |
542 | write_exp_elt_opcode (OP_LONG); } | |
543 | ; | |
544 | ||
6c7a06a3 TT |
545 | exp : CHAR |
546 | { | |
547 | struct stoken_vector vec; | |
548 | vec.len = 1; | |
549 | vec.tokens = &$1; | |
550 | write_exp_string_vector ($1.type, &vec); | |
551 | } | |
552 | ; | |
553 | ||
c906108c SS |
554 | exp : NAME_OR_INT |
555 | { YYSTYPE val; | |
556 | parse_number ($1.stoken.ptr, $1.stoken.length, 0, &val); | |
557 | write_exp_elt_opcode (OP_LONG); | |
558 | write_exp_elt_type (val.typed_val_int.type); | |
559 | write_exp_elt_longcst ((LONGEST)val.typed_val_int.val); | |
560 | write_exp_elt_opcode (OP_LONG); | |
561 | } | |
562 | ; | |
563 | ||
564 | ||
565 | exp : FLOAT | |
566 | { write_exp_elt_opcode (OP_DOUBLE); | |
567 | write_exp_elt_type ($1.type); | |
568 | write_exp_elt_dblcst ($1.dval); | |
569 | write_exp_elt_opcode (OP_DOUBLE); } | |
570 | ; | |
571 | ||
27bc4d80 TJB |
572 | exp : DECFLOAT |
573 | { write_exp_elt_opcode (OP_DECFLOAT); | |
574 | write_exp_elt_type ($1.type); | |
575 | write_exp_elt_decfloatcst ($1.val); | |
576 | write_exp_elt_opcode (OP_DECFLOAT); } | |
577 | ; | |
578 | ||
c906108c SS |
579 | exp : variable |
580 | ; | |
581 | ||
582 | exp : VARIABLE | |
583 | /* Already written by write_dollar_variable. */ | |
584 | ; | |
585 | ||
586 | exp : SIZEOF '(' type ')' %prec UNARY | |
587 | { write_exp_elt_opcode (OP_LONG); | |
3e79cecf | 588 | write_exp_elt_type (parse_type->builtin_int); |
c906108c SS |
589 | CHECK_TYPEDEF ($3); |
590 | write_exp_elt_longcst ((LONGEST) TYPE_LENGTH ($3)); | |
591 | write_exp_elt_opcode (OP_LONG); } | |
592 | ; | |
593 | ||
c209f847 TT |
594 | string_exp: |
595 | STRING | |
596 | { | |
597 | /* We copy the string here, and not in the | |
598 | lexer, to guarantee that we do not leak a | |
599 | string. Note that we follow the | |
600 | NUL-termination convention of the | |
601 | lexer. */ | |
6c7a06a3 TT |
602 | struct typed_stoken *vec = XNEW (struct typed_stoken); |
603 | $$.len = 1; | |
604 | $$.tokens = vec; | |
605 | ||
606 | vec->type = $1.type; | |
607 | vec->length = $1.length; | |
608 | vec->ptr = malloc ($1.length + 1); | |
609 | memcpy (vec->ptr, $1.ptr, $1.length + 1); | |
c209f847 TT |
610 | } |
611 | ||
612 | | string_exp STRING | |
613 | { | |
614 | /* Note that we NUL-terminate here, but just | |
615 | for convenience. */ | |
6c7a06a3 TT |
616 | char *p; |
617 | ++$$.len; | |
618 | $$.tokens = realloc ($$.tokens, | |
619 | $$.len * sizeof (struct typed_stoken)); | |
620 | ||
621 | p = malloc ($2.length + 1); | |
622 | memcpy (p, $2.ptr, $2.length + 1); | |
623 | ||
624 | $$.tokens[$$.len - 1].type = $2.type; | |
625 | $$.tokens[$$.len - 1].length = $2.length; | |
626 | $$.tokens[$$.len - 1].ptr = p; | |
c209f847 TT |
627 | } |
628 | ; | |
629 | ||
630 | exp : string_exp | |
6c7a06a3 TT |
631 | { |
632 | int i; | |
633 | enum c_string_type type = C_STRING; | |
634 | ||
635 | for (i = 0; i < $1.len; ++i) | |
c906108c | 636 | { |
6c7a06a3 TT |
637 | switch ($1.tokens[i].type) |
638 | { | |
639 | case C_STRING: | |
640 | break; | |
641 | case C_WIDE_STRING: | |
642 | case C_STRING_16: | |
643 | case C_STRING_32: | |
644 | if (type != C_STRING | |
645 | && type != $1.tokens[i].type) | |
646 | error ("Undefined string concatenation."); | |
647 | type = $1.tokens[i].type; | |
648 | break; | |
649 | default: | |
650 | /* internal error */ | |
651 | internal_error (__FILE__, __LINE__, | |
652 | "unrecognized type in string concatenation"); | |
653 | } | |
c906108c | 654 | } |
6c7a06a3 TT |
655 | |
656 | write_exp_string_vector (type, &$1); | |
657 | for (i = 0; i < $1.len; ++i) | |
658 | free ($1.tokens[i].ptr); | |
659 | free ($1.tokens); | |
c209f847 | 660 | } |
c906108c SS |
661 | ; |
662 | ||
663 | /* C++. */ | |
c906108c SS |
664 | exp : TRUEKEYWORD |
665 | { write_exp_elt_opcode (OP_LONG); | |
3e79cecf | 666 | write_exp_elt_type (parse_type->builtin_bool); |
c906108c SS |
667 | write_exp_elt_longcst ((LONGEST) 1); |
668 | write_exp_elt_opcode (OP_LONG); } | |
669 | ; | |
670 | ||
671 | exp : FALSEKEYWORD | |
672 | { write_exp_elt_opcode (OP_LONG); | |
3e79cecf | 673 | write_exp_elt_type (parse_type->builtin_bool); |
c906108c SS |
674 | write_exp_elt_longcst ((LONGEST) 0); |
675 | write_exp_elt_opcode (OP_LONG); } | |
676 | ; | |
677 | ||
678 | /* end of C++. */ | |
679 | ||
680 | block : BLOCKNAME | |
681 | { | |
682 | if ($1.sym) | |
683 | $$ = SYMBOL_BLOCK_VALUE ($1.sym); | |
684 | else | |
685 | error ("No file or function \"%s\".", | |
686 | copy_name ($1.stoken)); | |
687 | } | |
688 | | FILENAME | |
689 | { | |
690 | $$ = $1; | |
691 | } | |
692 | ; | |
693 | ||
694 | block : block COLONCOLON name | |
695 | { struct symbol *tem | |
696 | = lookup_symbol (copy_name ($3), $1, | |
2570f2b7 | 697 | VAR_DOMAIN, (int *) NULL); |
c906108c SS |
698 | if (!tem || SYMBOL_CLASS (tem) != LOC_BLOCK) |
699 | error ("No function \"%s\" in specified context.", | |
700 | copy_name ($3)); | |
701 | $$ = SYMBOL_BLOCK_VALUE (tem); } | |
702 | ; | |
703 | ||
704 | variable: block COLONCOLON name | |
705 | { struct symbol *sym; | |
706 | sym = lookup_symbol (copy_name ($3), $1, | |
2570f2b7 | 707 | VAR_DOMAIN, (int *) NULL); |
c906108c SS |
708 | if (sym == 0) |
709 | error ("No symbol \"%s\" in specified context.", | |
710 | copy_name ($3)); | |
711 | ||
712 | write_exp_elt_opcode (OP_VAR_VALUE); | |
713 | /* block_found is set by lookup_symbol. */ | |
714 | write_exp_elt_block (block_found); | |
715 | write_exp_elt_sym (sym); | |
716 | write_exp_elt_opcode (OP_VAR_VALUE); } | |
717 | ; | |
718 | ||
719 | qualified_name: typebase COLONCOLON name | |
720 | { | |
721 | struct type *type = $1; | |
e8269d5f | 722 | CHECK_TYPEDEF (type); |
c906108c | 723 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT |
79c2c32d DC |
724 | && TYPE_CODE (type) != TYPE_CODE_UNION |
725 | && TYPE_CODE (type) != TYPE_CODE_NAMESPACE) | |
c906108c SS |
726 | error ("`%s' is not defined as an aggregate type.", |
727 | TYPE_NAME (type)); | |
728 | ||
729 | write_exp_elt_opcode (OP_SCOPE); | |
730 | write_exp_elt_type (type); | |
731 | write_exp_string ($3); | |
732 | write_exp_elt_opcode (OP_SCOPE); | |
733 | } | |
734 | | typebase COLONCOLON '~' name | |
735 | { | |
736 | struct type *type = $1; | |
737 | struct stoken tmp_token; | |
e8269d5f | 738 | CHECK_TYPEDEF (type); |
c906108c | 739 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT |
79c2c32d DC |
740 | && TYPE_CODE (type) != TYPE_CODE_UNION |
741 | && TYPE_CODE (type) != TYPE_CODE_NAMESPACE) | |
c906108c SS |
742 | error ("`%s' is not defined as an aggregate type.", |
743 | TYPE_NAME (type)); | |
744 | ||
745 | tmp_token.ptr = (char*) alloca ($4.length + 2); | |
746 | tmp_token.length = $4.length + 1; | |
747 | tmp_token.ptr[0] = '~'; | |
748 | memcpy (tmp_token.ptr+1, $4.ptr, $4.length); | |
749 | tmp_token.ptr[tmp_token.length] = 0; | |
750 | ||
751 | /* Check for valid destructor name. */ | |
752 | destructor_name_p (tmp_token.ptr, type); | |
753 | write_exp_elt_opcode (OP_SCOPE); | |
754 | write_exp_elt_type (type); | |
755 | write_exp_string (tmp_token); | |
756 | write_exp_elt_opcode (OP_SCOPE); | |
757 | } | |
758 | ; | |
759 | ||
760 | variable: qualified_name | |
761 | | COLONCOLON name | |
762 | { | |
763 | char *name = copy_name ($2); | |
764 | struct symbol *sym; | |
765 | struct minimal_symbol *msymbol; | |
766 | ||
767 | sym = | |
768 | lookup_symbol (name, (const struct block *) NULL, | |
2570f2b7 | 769 | VAR_DOMAIN, (int *) NULL); |
c906108c SS |
770 | if (sym) |
771 | { | |
772 | write_exp_elt_opcode (OP_VAR_VALUE); | |
773 | write_exp_elt_block (NULL); | |
774 | write_exp_elt_sym (sym); | |
775 | write_exp_elt_opcode (OP_VAR_VALUE); | |
776 | break; | |
777 | } | |
778 | ||
779 | msymbol = lookup_minimal_symbol (name, NULL, NULL); | |
780 | if (msymbol != NULL) | |
c841afd5 UW |
781 | write_exp_msymbol (msymbol); |
782 | else if (!have_full_symbols () && !have_partial_symbols ()) | |
783 | error ("No symbol table is loaded. Use the \"file\" command."); | |
c906108c | 784 | else |
c841afd5 | 785 | error ("No symbol \"%s\" in current context.", name); |
c906108c SS |
786 | } |
787 | ; | |
788 | ||
789 | variable: name_not_typename | |
790 | { struct symbol *sym = $1.sym; | |
791 | ||
792 | if (sym) | |
793 | { | |
794 | if (symbol_read_needs_frame (sym)) | |
795 | { | |
5aafa1cc PM |
796 | if (innermost_block == 0 |
797 | || contained_in (block_found, | |
798 | innermost_block)) | |
c906108c SS |
799 | innermost_block = block_found; |
800 | } | |
801 | ||
802 | write_exp_elt_opcode (OP_VAR_VALUE); | |
803 | /* We want to use the selected frame, not | |
804 | another more inner frame which happens to | |
805 | be in the same block. */ | |
806 | write_exp_elt_block (NULL); | |
807 | write_exp_elt_sym (sym); | |
808 | write_exp_elt_opcode (OP_VAR_VALUE); | |
809 | } | |
810 | else if ($1.is_a_field_of_this) | |
811 | { | |
812 | /* C++: it hangs off of `this'. Must | |
813 | not inadvertently convert from a method call | |
814 | to data ref. */ | |
5aafa1cc PM |
815 | if (innermost_block == 0 |
816 | || contained_in (block_found, | |
817 | innermost_block)) | |
c906108c SS |
818 | innermost_block = block_found; |
819 | write_exp_elt_opcode (OP_THIS); | |
820 | write_exp_elt_opcode (OP_THIS); | |
821 | write_exp_elt_opcode (STRUCTOP_PTR); | |
822 | write_exp_string ($1.stoken); | |
823 | write_exp_elt_opcode (STRUCTOP_PTR); | |
824 | } | |
825 | else | |
826 | { | |
827 | struct minimal_symbol *msymbol; | |
710122da | 828 | char *arg = copy_name ($1.stoken); |
c906108c SS |
829 | |
830 | msymbol = | |
831 | lookup_minimal_symbol (arg, NULL, NULL); | |
832 | if (msymbol != NULL) | |
c841afd5 | 833 | write_exp_msymbol (msymbol); |
c906108c SS |
834 | else if (!have_full_symbols () && !have_partial_symbols ()) |
835 | error ("No symbol table is loaded. Use the \"file\" command."); | |
836 | else | |
837 | error ("No symbol \"%s\" in current context.", | |
838 | copy_name ($1.stoken)); | |
839 | } | |
840 | } | |
841 | ; | |
842 | ||
47663de5 MS |
843 | space_identifier : '@' NAME |
844 | { push_type_address_space (copy_name ($2.stoken)); | |
845 | push_type (tp_space_identifier); | |
846 | } | |
847 | ; | |
c906108c | 848 | |
47663de5 MS |
849 | const_or_volatile: const_or_volatile_noopt |
850 | | | |
c906108c | 851 | ; |
47663de5 MS |
852 | |
853 | cv_with_space_id : const_or_volatile space_identifier const_or_volatile | |
56e2d25a | 854 | ; |
47663de5 MS |
855 | |
856 | const_or_volatile_or_space_identifier_noopt: cv_with_space_id | |
857 | | const_or_volatile_noopt | |
56e2d25a | 858 | ; |
47663de5 MS |
859 | |
860 | const_or_volatile_or_space_identifier: | |
861 | const_or_volatile_or_space_identifier_noopt | |
862 | | | |
56e2d25a | 863 | ; |
47663de5 | 864 | |
c906108c SS |
865 | abs_decl: '*' |
866 | { push_type (tp_pointer); $$ = 0; } | |
867 | | '*' abs_decl | |
868 | { push_type (tp_pointer); $$ = $2; } | |
869 | | '&' | |
870 | { push_type (tp_reference); $$ = 0; } | |
871 | | '&' abs_decl | |
872 | { push_type (tp_reference); $$ = $2; } | |
873 | | direct_abs_decl | |
874 | ; | |
875 | ||
876 | direct_abs_decl: '(' abs_decl ')' | |
877 | { $$ = $2; } | |
878 | | direct_abs_decl array_mod | |
879 | { | |
880 | push_type_int ($2); | |
881 | push_type (tp_array); | |
882 | } | |
883 | | array_mod | |
884 | { | |
885 | push_type_int ($1); | |
886 | push_type (tp_array); | |
887 | $$ = 0; | |
888 | } | |
889 | ||
890 | | direct_abs_decl func_mod | |
891 | { push_type (tp_function); } | |
892 | | func_mod | |
893 | { push_type (tp_function); } | |
894 | ; | |
895 | ||
896 | array_mod: '[' ']' | |
897 | { $$ = -1; } | |
898 | | '[' INT ']' | |
899 | { $$ = $2.val; } | |
900 | ; | |
901 | ||
902 | func_mod: '(' ')' | |
903 | { $$ = 0; } | |
904 | | '(' nonempty_typelist ')' | |
8dbb1c65 | 905 | { free ($2); $$ = 0; } |
c906108c SS |
906 | ; |
907 | ||
a22229c4 | 908 | /* We used to try to recognize pointer to member types here, but |
c906108c SS |
909 | that didn't work (shift/reduce conflicts meant that these rules never |
910 | got executed). The problem is that | |
911 | int (foo::bar::baz::bizzle) | |
912 | is a function type but | |
913 | int (foo::bar::baz::bizzle::*) | |
914 | is a pointer to member type. Stroustrup loses again! */ | |
915 | ||
916 | type : ptype | |
c906108c SS |
917 | ; |
918 | ||
919 | typebase /* Implements (approximately): (type-qualifier)* type-specifier */ | |
920 | : TYPENAME | |
921 | { $$ = $1.type; } | |
922 | | INT_KEYWORD | |
3e79cecf | 923 | { $$ = parse_type->builtin_int; } |
c906108c | 924 | | LONG |
3e79cecf | 925 | { $$ = parse_type->builtin_long; } |
c906108c | 926 | | SHORT |
3e79cecf | 927 | { $$ = parse_type->builtin_short; } |
c906108c | 928 | | LONG INT_KEYWORD |
3e79cecf | 929 | { $$ = parse_type->builtin_long; } |
b2c4da81 | 930 | | LONG SIGNED_KEYWORD INT_KEYWORD |
3e79cecf | 931 | { $$ = parse_type->builtin_long; } |
b2c4da81 | 932 | | LONG SIGNED_KEYWORD |
3e79cecf | 933 | { $$ = parse_type->builtin_long; } |
b2c4da81 | 934 | | SIGNED_KEYWORD LONG INT_KEYWORD |
3e79cecf | 935 | { $$ = parse_type->builtin_long; } |
c906108c | 936 | | UNSIGNED LONG INT_KEYWORD |
3e79cecf | 937 | { $$ = parse_type->builtin_unsigned_long; } |
b2c4da81 | 938 | | LONG UNSIGNED INT_KEYWORD |
3e79cecf | 939 | { $$ = parse_type->builtin_unsigned_long; } |
b2c4da81 | 940 | | LONG UNSIGNED |
3e79cecf | 941 | { $$ = parse_type->builtin_unsigned_long; } |
c906108c | 942 | | LONG LONG |
3e79cecf | 943 | { $$ = parse_type->builtin_long_long; } |
c906108c | 944 | | LONG LONG INT_KEYWORD |
3e79cecf | 945 | { $$ = parse_type->builtin_long_long; } |
b2c4da81 | 946 | | LONG LONG SIGNED_KEYWORD INT_KEYWORD |
3e79cecf | 947 | { $$ = parse_type->builtin_long_long; } |
b2c4da81 | 948 | | LONG LONG SIGNED_KEYWORD |
3e79cecf | 949 | { $$ = parse_type->builtin_long_long; } |
b2c4da81 | 950 | | SIGNED_KEYWORD LONG LONG |
3e79cecf | 951 | { $$ = parse_type->builtin_long_long; } |
55baeb84 | 952 | | SIGNED_KEYWORD LONG LONG INT_KEYWORD |
3e79cecf | 953 | { $$ = parse_type->builtin_long_long; } |
c906108c | 954 | | UNSIGNED LONG LONG |
3e79cecf | 955 | { $$ = parse_type->builtin_unsigned_long_long; } |
c906108c | 956 | | UNSIGNED LONG LONG INT_KEYWORD |
3e79cecf | 957 | { $$ = parse_type->builtin_unsigned_long_long; } |
b2c4da81 | 958 | | LONG LONG UNSIGNED |
3e79cecf | 959 | { $$ = parse_type->builtin_unsigned_long_long; } |
b2c4da81 | 960 | | LONG LONG UNSIGNED INT_KEYWORD |
3e79cecf | 961 | { $$ = parse_type->builtin_unsigned_long_long; } |
c906108c | 962 | | SHORT INT_KEYWORD |
3e79cecf | 963 | { $$ = parse_type->builtin_short; } |
b2c4da81 | 964 | | SHORT SIGNED_KEYWORD INT_KEYWORD |
3e79cecf | 965 | { $$ = parse_type->builtin_short; } |
b2c4da81 | 966 | | SHORT SIGNED_KEYWORD |
3e79cecf | 967 | { $$ = parse_type->builtin_short; } |
c906108c | 968 | | UNSIGNED SHORT INT_KEYWORD |
3e79cecf | 969 | { $$ = parse_type->builtin_unsigned_short; } |
b2c4da81 | 970 | | SHORT UNSIGNED |
3e79cecf | 971 | { $$ = parse_type->builtin_unsigned_short; } |
b2c4da81 | 972 | | SHORT UNSIGNED INT_KEYWORD |
3e79cecf | 973 | { $$ = parse_type->builtin_unsigned_short; } |
c906108c | 974 | | DOUBLE_KEYWORD |
3e79cecf | 975 | { $$ = parse_type->builtin_double; } |
c906108c | 976 | | LONG DOUBLE_KEYWORD |
3e79cecf | 977 | { $$ = parse_type->builtin_long_double; } |
c906108c SS |
978 | | STRUCT name |
979 | { $$ = lookup_struct (copy_name ($2), | |
980 | expression_context_block); } | |
981 | | CLASS name | |
982 | { $$ = lookup_struct (copy_name ($2), | |
983 | expression_context_block); } | |
984 | | UNION name | |
985 | { $$ = lookup_union (copy_name ($2), | |
986 | expression_context_block); } | |
987 | | ENUM name | |
988 | { $$ = lookup_enum (copy_name ($2), | |
989 | expression_context_block); } | |
990 | | UNSIGNED typename | |
e6c014f2 UW |
991 | { $$ = lookup_unsigned_typename (parse_language, |
992 | parse_gdbarch, | |
993 | TYPE_NAME($2.type)); } | |
c906108c | 994 | | UNSIGNED |
3e79cecf | 995 | { $$ = parse_type->builtin_unsigned_int; } |
c906108c | 996 | | SIGNED_KEYWORD typename |
e6c014f2 UW |
997 | { $$ = lookup_signed_typename (parse_language, |
998 | parse_gdbarch, | |
999 | TYPE_NAME($2.type)); } | |
c906108c | 1000 | | SIGNED_KEYWORD |
3e79cecf | 1001 | { $$ = parse_type->builtin_int; } |
c906108c SS |
1002 | /* It appears that this rule for templates is never |
1003 | reduced; template recognition happens by lookahead | |
1004 | in the token processing code in yylex. */ | |
1005 | | TEMPLATE name '<' type '>' | |
1006 | { $$ = lookup_template_type(copy_name($2), $4, | |
1007 | expression_context_block); | |
1008 | } | |
47663de5 MS |
1009 | | const_or_volatile_or_space_identifier_noopt typebase |
1010 | { $$ = follow_types ($2); } | |
1011 | | typebase const_or_volatile_or_space_identifier_noopt | |
1012 | { $$ = follow_types ($1); } | |
79c2c32d DC |
1013 | | qualified_type |
1014 | ; | |
1015 | ||
1016 | /* FIXME: carlton/2003-09-25: This next bit leads to lots of | |
1017 | reduce-reduce conflicts, because the parser doesn't know whether or | |
1018 | not to use qualified_name or qualified_type: the rules are | |
1019 | identical. If the parser is parsing 'A::B::x', then, when it sees | |
1020 | the second '::', it knows that the expression to the left of it has | |
1021 | to be a type, so it uses qualified_type. But if it is parsing just | |
1022 | 'A::B', then it doesn't have any way of knowing which rule to use, | |
1023 | so there's a reduce-reduce conflict; it picks qualified_name, since | |
1024 | that occurs earlier in this file than qualified_type. | |
1025 | ||
1026 | There's no good way to fix this with the grammar as it stands; as | |
1027 | far as I can tell, some of the problems arise from ambiguities that | |
1028 | GDB introduces ('start' can be either an expression or a type), but | |
1029 | some of it is inherent to the nature of C++ (you want to treat the | |
1030 | input "(FOO)" fairly differently depending on whether FOO is an | |
1031 | expression or a type, and if FOO is a complex expression, this can | |
1032 | be hard to determine at the right time). Fortunately, it works | |
1033 | pretty well in most cases. For example, if you do 'ptype A::B', | |
1034 | where A::B is a nested type, then the parser will mistakenly | |
1035 | misidentify it as an expression; but evaluate_subexp will get | |
1036 | called with 'noside' set to EVAL_AVOID_SIDE_EFFECTS, and everything | |
1037 | will work out anyways. But there are situations where the parser | |
1038 | will get confused: the most common one that I've run into is when | |
1039 | you want to do | |
1040 | ||
1041 | print *((A::B *) x)" | |
1042 | ||
1043 | where the parser doesn't realize that A::B has to be a type until | |
1044 | it hits the first right paren, at which point it's too late. (The | |
1045 | workaround is to type "print *(('A::B' *) x)" instead.) (And | |
1046 | another solution is to fix our symbol-handling code so that the | |
1047 | user never wants to type something like that in the first place, | |
1048 | because we get all the types right without the user's help!) | |
1049 | ||
1050 | Perhaps we could fix this by making the lexer smarter. Some of | |
1051 | this functionality used to be in the lexer, but in a way that | |
1052 | worked even less well than the current solution: that attempt | |
1053 | involved having the parser sometimes handle '::' and having the | |
1054 | lexer sometimes handle it, and without a clear division of | |
1055 | responsibility, it quickly degenerated into a big mess. Probably | |
1056 | the eventual correct solution will give more of a role to the lexer | |
1057 | (ideally via code that is shared between the lexer and | |
1058 | decode_line_1), but I'm not holding my breath waiting for somebody | |
1059 | to get around to cleaning this up... */ | |
1060 | ||
79c2c32d DC |
1061 | qualified_type: typebase COLONCOLON name |
1062 | { | |
1063 | struct type *type = $1; | |
1064 | struct type *new_type; | |
1065 | char *ncopy = alloca ($3.length + 1); | |
1066 | ||
1067 | memcpy (ncopy, $3.ptr, $3.length); | |
1068 | ncopy[$3.length] = '\0'; | |
1069 | ||
63d06c5c DC |
1070 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT |
1071 | && TYPE_CODE (type) != TYPE_CODE_UNION | |
1072 | && TYPE_CODE (type) != TYPE_CODE_NAMESPACE) | |
1073 | error ("`%s' is not defined as an aggregate type.", | |
79c2c32d DC |
1074 | TYPE_NAME (type)); |
1075 | ||
1076 | new_type = cp_lookup_nested_type (type, ncopy, | |
1077 | expression_context_block); | |
1078 | if (new_type == NULL) | |
63d06c5c | 1079 | error ("No type \"%s\" within class or namespace \"%s\".", |
79c2c32d DC |
1080 | ncopy, TYPE_NAME (type)); |
1081 | ||
1082 | $$ = new_type; | |
1083 | } | |
c906108c SS |
1084 | ; |
1085 | ||
1086 | typename: TYPENAME | |
1087 | | INT_KEYWORD | |
1088 | { | |
1089 | $$.stoken.ptr = "int"; | |
1090 | $$.stoken.length = 3; | |
3e79cecf | 1091 | $$.type = parse_type->builtin_int; |
c906108c SS |
1092 | } |
1093 | | LONG | |
1094 | { | |
1095 | $$.stoken.ptr = "long"; | |
1096 | $$.stoken.length = 4; | |
3e79cecf | 1097 | $$.type = parse_type->builtin_long; |
c906108c SS |
1098 | } |
1099 | | SHORT | |
1100 | { | |
1101 | $$.stoken.ptr = "short"; | |
1102 | $$.stoken.length = 5; | |
3e79cecf | 1103 | $$.type = parse_type->builtin_short; |
c906108c SS |
1104 | } |
1105 | ; | |
1106 | ||
1107 | nonempty_typelist | |
1108 | : type | |
1109 | { $$ = (struct type **) malloc (sizeof (struct type *) * 2); | |
1110 | $<ivec>$[0] = 1; /* Number of types in vector */ | |
1111 | $$[1] = $1; | |
1112 | } | |
1113 | | nonempty_typelist ',' type | |
1114 | { int len = sizeof (struct type *) * (++($<ivec>1[0]) + 1); | |
1115 | $$ = (struct type **) realloc ((char *) $1, len); | |
1116 | $$[$<ivec>$[0]] = $3; | |
1117 | } | |
1118 | ; | |
1119 | ||
47663de5 MS |
1120 | ptype : typebase |
1121 | | ptype const_or_volatile_or_space_identifier abs_decl const_or_volatile_or_space_identifier | |
1122 | { $$ = follow_types ($1); } | |
1123 | ; | |
1124 | ||
1125 | const_and_volatile: CONST_KEYWORD VOLATILE_KEYWORD | |
1126 | | VOLATILE_KEYWORD CONST_KEYWORD | |
1127 | ; | |
1128 | ||
1129 | const_or_volatile_noopt: const_and_volatile | |
1130 | { push_type (tp_const); | |
1131 | push_type (tp_volatile); | |
1132 | } | |
1133 | | CONST_KEYWORD | |
1134 | { push_type (tp_const); } | |
1135 | | VOLATILE_KEYWORD | |
1136 | { push_type (tp_volatile); } | |
1137 | ; | |
1138 | ||
66c53f2b KS |
1139 | operator: OPERATOR NEW |
1140 | { $$ = operator_stoken (" new"); } | |
1141 | | OPERATOR DELETE | |
1142 | { $$ = operator_stoken (" delete"); } | |
1143 | | OPERATOR NEW '[' ']' | |
1144 | { $$ = operator_stoken (" new[]"); } | |
1145 | | OPERATOR DELETE '[' ']' | |
1146 | { $$ = operator_stoken (" delete[]"); } | |
1147 | | OPERATOR '+' | |
1148 | { $$ = operator_stoken ("+"); } | |
1149 | | OPERATOR '-' | |
1150 | { $$ = operator_stoken ("-"); } | |
1151 | | OPERATOR '*' | |
1152 | { $$ = operator_stoken ("*"); } | |
1153 | | OPERATOR '/' | |
1154 | { $$ = operator_stoken ("/"); } | |
1155 | | OPERATOR '%' | |
1156 | { $$ = operator_stoken ("%"); } | |
1157 | | OPERATOR '^' | |
1158 | { $$ = operator_stoken ("^"); } | |
1159 | | OPERATOR '&' | |
1160 | { $$ = operator_stoken ("&"); } | |
1161 | | OPERATOR '|' | |
1162 | { $$ = operator_stoken ("|"); } | |
1163 | | OPERATOR '~' | |
1164 | { $$ = operator_stoken ("~"); } | |
1165 | | OPERATOR '!' | |
1166 | { $$ = operator_stoken ("!"); } | |
1167 | | OPERATOR '=' | |
1168 | { $$ = operator_stoken ("="); } | |
1169 | | OPERATOR '<' | |
1170 | { $$ = operator_stoken ("<"); } | |
1171 | | OPERATOR '>' | |
1172 | { $$ = operator_stoken (">"); } | |
1173 | | OPERATOR ASSIGN_MODIFY | |
1174 | { const char *op = "unknown"; | |
1175 | switch ($2) | |
1176 | { | |
1177 | case BINOP_RSH: | |
1178 | op = ">>="; | |
1179 | break; | |
1180 | case BINOP_LSH: | |
1181 | op = "<<="; | |
1182 | break; | |
1183 | case BINOP_ADD: | |
1184 | op = "+="; | |
1185 | break; | |
1186 | case BINOP_SUB: | |
1187 | op = "-="; | |
1188 | break; | |
1189 | case BINOP_MUL: | |
1190 | op = "*="; | |
1191 | break; | |
1192 | case BINOP_DIV: | |
1193 | op = "/="; | |
1194 | break; | |
1195 | case BINOP_REM: | |
1196 | op = "%="; | |
1197 | break; | |
1198 | case BINOP_BITWISE_IOR: | |
1199 | op = "|="; | |
1200 | break; | |
1201 | case BINOP_BITWISE_AND: | |
1202 | op = "&="; | |
1203 | break; | |
1204 | case BINOP_BITWISE_XOR: | |
1205 | op = "^="; | |
1206 | break; | |
1207 | default: | |
1208 | break; | |
1209 | } | |
1210 | ||
1211 | $$ = operator_stoken (op); | |
1212 | } | |
1213 | | OPERATOR LSH | |
1214 | { $$ = operator_stoken ("<<"); } | |
1215 | | OPERATOR RSH | |
1216 | { $$ = operator_stoken (">>"); } | |
1217 | | OPERATOR EQUAL | |
1218 | { $$ = operator_stoken ("=="); } | |
1219 | | OPERATOR NOTEQUAL | |
1220 | { $$ = operator_stoken ("!="); } | |
1221 | | OPERATOR LEQ | |
1222 | { $$ = operator_stoken ("<="); } | |
1223 | | OPERATOR GEQ | |
1224 | { $$ = operator_stoken (">="); } | |
1225 | | OPERATOR ANDAND | |
1226 | { $$ = operator_stoken ("&&"); } | |
1227 | | OPERATOR OROR | |
1228 | { $$ = operator_stoken ("||"); } | |
1229 | | OPERATOR INCREMENT | |
1230 | { $$ = operator_stoken ("++"); } | |
1231 | | OPERATOR DECREMENT | |
1232 | { $$ = operator_stoken ("--"); } | |
1233 | | OPERATOR ',' | |
1234 | { $$ = operator_stoken (","); } | |
1235 | | OPERATOR ARROW_STAR | |
1236 | { $$ = operator_stoken ("->*"); } | |
1237 | | OPERATOR ARROW | |
1238 | { $$ = operator_stoken ("->"); } | |
1239 | | OPERATOR '(' ')' | |
1240 | { $$ = operator_stoken ("()"); } | |
1241 | | OPERATOR '[' ']' | |
1242 | { $$ = operator_stoken ("[]"); } | |
1243 | | OPERATOR ptype | |
1244 | { char *name; | |
1245 | long length; | |
1246 | struct ui_file *buf = mem_fileopen (); | |
1247 | ||
1248 | c_print_type ($2, NULL, buf, -1, 0); | |
1249 | name = ui_file_xstrdup (buf, &length); | |
1250 | ui_file_delete (buf); | |
1251 | $$ = operator_stoken (name); | |
1252 | free (name); | |
1253 | } | |
1254 | ; | |
1255 | ||
1256 | ||
1257 | ||
c906108c SS |
1258 | name : NAME { $$ = $1.stoken; } |
1259 | | BLOCKNAME { $$ = $1.stoken; } | |
1260 | | TYPENAME { $$ = $1.stoken; } | |
1261 | | NAME_OR_INT { $$ = $1.stoken; } | |
66c53f2b | 1262 | | operator { $$ = $1; } |
c906108c SS |
1263 | ; |
1264 | ||
1265 | name_not_typename : NAME | |
1266 | | BLOCKNAME | |
1267 | /* These would be useful if name_not_typename was useful, but it is just | |
1268 | a fake for "variable", so these cause reduce/reduce conflicts because | |
1269 | the parser can't tell whether NAME_OR_INT is a name_not_typename (=variable, | |
1270 | =exp) or just an exp. If name_not_typename was ever used in an lvalue | |
1271 | context where only a name could occur, this might be useful. | |
1272 | | NAME_OR_INT | |
1273 | */ | |
1274 | ; | |
1275 | ||
1276 | %% | |
1277 | ||
66c53f2b KS |
1278 | /* Returns a stoken of the operator name given by OP (which does not |
1279 | include the string "operator"). */ | |
1280 | static struct stoken | |
1281 | operator_stoken (const char *op) | |
1282 | { | |
1283 | static const char *operator_string = "operator"; | |
1284 | struct stoken st = { NULL, 0 }; | |
1285 | st.length = strlen (operator_string) + strlen (op); | |
1286 | st.ptr = malloc (st.length + 1); | |
1287 | strcpy (st.ptr, operator_string); | |
1288 | strcat (st.ptr, op); | |
1289 | ||
1290 | /* The toplevel (c_parse) will free the memory allocated here. */ | |
1291 | make_cleanup (free, st.ptr); | |
1292 | return st; | |
1293 | }; | |
1294 | ||
c906108c SS |
1295 | /* Take care of parsing a number (anything that starts with a digit). |
1296 | Set yylval and return the token type; update lexptr. | |
1297 | LEN is the number of characters in it. */ | |
1298 | ||
1299 | /*** Needs some error checking for the float case ***/ | |
1300 | ||
1301 | static int | |
68c1b02d | 1302 | parse_number (char *p, int len, int parsed_float, YYSTYPE *putithere) |
c906108c SS |
1303 | { |
1304 | /* FIXME: Shouldn't these be unsigned? We don't deal with negative values | |
1305 | here, and we do kind of silly things like cast to unsigned. */ | |
710122da DC |
1306 | LONGEST n = 0; |
1307 | LONGEST prevn = 0; | |
c906108c SS |
1308 | ULONGEST un; |
1309 | ||
710122da DC |
1310 | int i = 0; |
1311 | int c; | |
1312 | int base = input_radix; | |
c906108c SS |
1313 | int unsigned_p = 0; |
1314 | ||
1315 | /* Number of "L" suffixes encountered. */ | |
1316 | int long_p = 0; | |
1317 | ||
1318 | /* We have found a "L" or "U" suffix. */ | |
1319 | int found_suffix = 0; | |
1320 | ||
1321 | ULONGEST high_bit; | |
1322 | struct type *signed_type; | |
1323 | struct type *unsigned_type; | |
1324 | ||
1325 | if (parsed_float) | |
1326 | { | |
1327 | /* It's a float since it contains a point or an exponent. */ | |
fe9441f6 JK |
1328 | char *s; |
1329 | int num; /* number of tokens scanned by scanf */ | |
1330 | char saved_char; | |
27bc4d80 TJB |
1331 | |
1332 | /* If it ends at "df", "dd" or "dl", take it as type of decimal floating | |
1333 | point. Return DECFLOAT. */ | |
1334 | ||
fe9441f6 | 1335 | if (len >= 2 && p[len - 2] == 'd' && p[len - 1] == 'f') |
27bc4d80 TJB |
1336 | { |
1337 | p[len - 2] = '\0'; | |
1338 | putithere->typed_val_decfloat.type | |
3e79cecf | 1339 | = parse_type->builtin_decfloat; |
e17a4113 UW |
1340 | decimal_from_string (putithere->typed_val_decfloat.val, 4, |
1341 | gdbarch_byte_order (parse_gdbarch), p); | |
fe9441f6 JK |
1342 | p[len - 2] = 'd'; |
1343 | return DECFLOAT; | |
27bc4d80 TJB |
1344 | } |
1345 | ||
fe9441f6 | 1346 | if (len >= 2 && p[len - 2] == 'd' && p[len - 1] == 'd') |
27bc4d80 TJB |
1347 | { |
1348 | p[len - 2] = '\0'; | |
1349 | putithere->typed_val_decfloat.type | |
3e79cecf | 1350 | = parse_type->builtin_decdouble; |
e17a4113 UW |
1351 | decimal_from_string (putithere->typed_val_decfloat.val, 8, |
1352 | gdbarch_byte_order (parse_gdbarch), p); | |
fe9441f6 JK |
1353 | p[len - 2] = 'd'; |
1354 | return DECFLOAT; | |
27bc4d80 TJB |
1355 | } |
1356 | ||
fe9441f6 | 1357 | if (len >= 2 && p[len - 2] == 'd' && p[len - 1] == 'l') |
27bc4d80 TJB |
1358 | { |
1359 | p[len - 2] = '\0'; | |
1360 | putithere->typed_val_decfloat.type | |
3e79cecf | 1361 | = parse_type->builtin_declong; |
e17a4113 UW |
1362 | decimal_from_string (putithere->typed_val_decfloat.val, 16, |
1363 | gdbarch_byte_order (parse_gdbarch), p); | |
fe9441f6 JK |
1364 | p[len - 2] = 'd'; |
1365 | return DECFLOAT; | |
27bc4d80 TJB |
1366 | } |
1367 | ||
fe9441f6 JK |
1368 | s = malloc (len); |
1369 | saved_char = p[len]; | |
1370 | p[len] = 0; /* null-terminate the token */ | |
689e4e2d | 1371 | num = sscanf (p, "%" DOUBLEST_SCAN_FORMAT "%s", |
96c1eda2 | 1372 | &putithere->typed_val_float.dval, s); |
c906108c | 1373 | p[len] = saved_char; /* restore the input stream */ |
42969d33 WZ |
1374 | |
1375 | if (num == 1) | |
1376 | putithere->typed_val_float.type = | |
3e79cecf | 1377 | parse_type->builtin_double; |
42969d33 WZ |
1378 | |
1379 | if (num == 2 ) | |
1380 | { | |
1381 | /* See if it has any float suffix: 'f' for float, 'l' for long | |
1382 | double. */ | |
1383 | if (!strcasecmp (s, "f")) | |
1384 | putithere->typed_val_float.type = | |
3e79cecf | 1385 | parse_type->builtin_float; |
42969d33 WZ |
1386 | else if (!strcasecmp (s, "l")) |
1387 | putithere->typed_val_float.type = | |
3e79cecf | 1388 | parse_type->builtin_long_double; |
42969d33 | 1389 | else |
348038cd MS |
1390 | { |
1391 | free (s); | |
1392 | return ERROR; | |
1393 | } | |
42969d33 | 1394 | } |
c906108c | 1395 | |
348038cd | 1396 | free (s); |
c906108c SS |
1397 | return FLOAT; |
1398 | } | |
1399 | ||
1400 | /* Handle base-switching prefixes 0x, 0t, 0d, 0 */ | |
1401 | if (p[0] == '0') | |
1402 | switch (p[1]) | |
1403 | { | |
1404 | case 'x': | |
1405 | case 'X': | |
1406 | if (len >= 3) | |
1407 | { | |
1408 | p += 2; | |
1409 | base = 16; | |
1410 | len -= 2; | |
1411 | } | |
1412 | break; | |
1413 | ||
1414 | case 't': | |
1415 | case 'T': | |
1416 | case 'd': | |
1417 | case 'D': | |
1418 | if (len >= 3) | |
1419 | { | |
1420 | p += 2; | |
1421 | base = 10; | |
1422 | len -= 2; | |
1423 | } | |
1424 | break; | |
1425 | ||
1426 | default: | |
1427 | base = 8; | |
1428 | break; | |
1429 | } | |
1430 | ||
1431 | while (len-- > 0) | |
1432 | { | |
1433 | c = *p++; | |
1434 | if (c >= 'A' && c <= 'Z') | |
1435 | c += 'a' - 'A'; | |
1436 | if (c != 'l' && c != 'u') | |
1437 | n *= base; | |
1438 | if (c >= '0' && c <= '9') | |
1439 | { | |
1440 | if (found_suffix) | |
1441 | return ERROR; | |
1442 | n += i = c - '0'; | |
1443 | } | |
1444 | else | |
1445 | { | |
1446 | if (base > 10 && c >= 'a' && c <= 'f') | |
1447 | { | |
1448 | if (found_suffix) | |
1449 | return ERROR; | |
1450 | n += i = c - 'a' + 10; | |
1451 | } | |
1452 | else if (c == 'l') | |
1453 | { | |
1454 | ++long_p; | |
1455 | found_suffix = 1; | |
1456 | } | |
1457 | else if (c == 'u') | |
1458 | { | |
1459 | unsigned_p = 1; | |
1460 | found_suffix = 1; | |
1461 | } | |
1462 | else | |
1463 | return ERROR; /* Char not a digit */ | |
1464 | } | |
1465 | if (i >= base) | |
1466 | return ERROR; /* Invalid digit in this base */ | |
1467 | ||
1468 | /* Portably test for overflow (only works for nonzero values, so make | |
1469 | a second check for zero). FIXME: Can't we just make n and prevn | |
1470 | unsigned and avoid this? */ | |
1471 | if (c != 'l' && c != 'u' && (prevn >= n) && n != 0) | |
1472 | unsigned_p = 1; /* Try something unsigned */ | |
1473 | ||
1474 | /* Portably test for unsigned overflow. | |
1475 | FIXME: This check is wrong; for example it doesn't find overflow | |
1476 | on 0x123456789 when LONGEST is 32 bits. */ | |
1477 | if (c != 'l' && c != 'u' && n != 0) | |
1478 | { | |
1479 | if ((unsigned_p && (ULONGEST) prevn >= (ULONGEST) n)) | |
1480 | error ("Numeric constant too large."); | |
1481 | } | |
1482 | prevn = n; | |
1483 | } | |
1484 | ||
1485 | /* An integer constant is an int, a long, or a long long. An L | |
1486 | suffix forces it to be long; an LL suffix forces it to be long | |
1487 | long. If not forced to a larger size, it gets the first type of | |
1488 | the above that it fits in. To figure out whether it fits, we | |
1489 | shift it right and see whether anything remains. Note that we | |
1490 | can't shift sizeof (LONGEST) * HOST_CHAR_BIT bits or more in one | |
1491 | operation, because many compilers will warn about such a shift | |
9a76efb6 UW |
1492 | (which always produces a zero result). Sometimes gdbarch_int_bit |
1493 | or gdbarch_long_bit will be that big, sometimes not. To deal with | |
c906108c SS |
1494 | the case where it is we just always shift the value more than |
1495 | once, with fewer bits each time. */ | |
1496 | ||
1497 | un = (ULONGEST)n >> 2; | |
1498 | if (long_p == 0 | |
3e79cecf | 1499 | && (un >> (gdbarch_int_bit (parse_gdbarch) - 2)) == 0) |
c906108c | 1500 | { |
3e79cecf | 1501 | high_bit = ((ULONGEST)1) << (gdbarch_int_bit (parse_gdbarch) - 1); |
c906108c SS |
1502 | |
1503 | /* A large decimal (not hex or octal) constant (between INT_MAX | |
1504 | and UINT_MAX) is a long or unsigned long, according to ANSI, | |
1505 | never an unsigned int, but this code treats it as unsigned | |
1506 | int. This probably should be fixed. GCC gives a warning on | |
1507 | such constants. */ | |
1508 | ||
3e79cecf UW |
1509 | unsigned_type = parse_type->builtin_unsigned_int; |
1510 | signed_type = parse_type->builtin_int; | |
c906108c SS |
1511 | } |
1512 | else if (long_p <= 1 | |
3e79cecf | 1513 | && (un >> (gdbarch_long_bit (parse_gdbarch) - 2)) == 0) |
c906108c | 1514 | { |
3e79cecf UW |
1515 | high_bit = ((ULONGEST)1) << (gdbarch_long_bit (parse_gdbarch) - 1); |
1516 | unsigned_type = parse_type->builtin_unsigned_long; | |
1517 | signed_type = parse_type->builtin_long; | |
c906108c SS |
1518 | } |
1519 | else | |
1520 | { | |
1521 | int shift; | |
9a76efb6 | 1522 | if (sizeof (ULONGEST) * HOST_CHAR_BIT |
3e79cecf | 1523 | < gdbarch_long_long_bit (parse_gdbarch)) |
c906108c SS |
1524 | /* A long long does not fit in a LONGEST. */ |
1525 | shift = (sizeof (ULONGEST) * HOST_CHAR_BIT - 1); | |
1526 | else | |
3e79cecf | 1527 | shift = (gdbarch_long_long_bit (parse_gdbarch) - 1); |
c906108c | 1528 | high_bit = (ULONGEST) 1 << shift; |
3e79cecf UW |
1529 | unsigned_type = parse_type->builtin_unsigned_long_long; |
1530 | signed_type = parse_type->builtin_long_long; | |
c906108c SS |
1531 | } |
1532 | ||
1533 | putithere->typed_val_int.val = n; | |
1534 | ||
1535 | /* If the high bit of the worked out type is set then this number | |
1536 | has to be unsigned. */ | |
1537 | ||
1538 | if (unsigned_p || (n & high_bit)) | |
1539 | { | |
1540 | putithere->typed_val_int.type = unsigned_type; | |
1541 | } | |
1542 | else | |
1543 | { | |
1544 | putithere->typed_val_int.type = signed_type; | |
1545 | } | |
1546 | ||
1547 | return INT; | |
1548 | } | |
1549 | ||
6c7a06a3 TT |
1550 | /* Temporary obstack used for holding strings. */ |
1551 | static struct obstack tempbuf; | |
1552 | static int tempbuf_init; | |
1553 | ||
1554 | /* Parse a C escape sequence. The initial backslash of the sequence | |
1555 | is at (*PTR)[-1]. *PTR will be updated to point to just after the | |
1556 | last character of the sequence. If OUTPUT is not NULL, the | |
1557 | translated form of the escape sequence will be written there. If | |
1558 | OUTPUT is NULL, no output is written and the call will only affect | |
1559 | *PTR. If an escape sequence is expressed in target bytes, then the | |
1560 | entire sequence will simply be copied to OUTPUT. Return 1 if any | |
1561 | character was emitted, 0 otherwise. */ | |
1562 | ||
1563 | int | |
1564 | c_parse_escape (char **ptr, struct obstack *output) | |
1565 | { | |
1566 | char *tokptr = *ptr; | |
1567 | int result = 1; | |
1568 | ||
1569 | /* Some escape sequences undergo character set conversion. Those we | |
1570 | translate here. */ | |
1571 | switch (*tokptr) | |
1572 | { | |
1573 | /* Hex escapes do not undergo character set conversion, so keep | |
1574 | the escape sequence for later. */ | |
1575 | case 'x': | |
1576 | if (output) | |
1577 | obstack_grow_str (output, "\\x"); | |
1578 | ++tokptr; | |
1579 | if (!isxdigit (*tokptr)) | |
1580 | error (_("\\x escape without a following hex digit")); | |
1581 | while (isxdigit (*tokptr)) | |
1582 | { | |
1583 | if (output) | |
1584 | obstack_1grow (output, *tokptr); | |
1585 | ++tokptr; | |
1586 | } | |
1587 | break; | |
1588 | ||
1589 | /* Octal escapes do not undergo character set conversion, so | |
1590 | keep the escape sequence for later. */ | |
1591 | case '0': | |
1592 | case '1': | |
1593 | case '2': | |
1594 | case '3': | |
1595 | case '4': | |
1596 | case '5': | |
1597 | case '6': | |
1598 | case '7': | |
30b66ecc TT |
1599 | { |
1600 | int i; | |
1601 | if (output) | |
1602 | obstack_grow_str (output, "\\"); | |
1603 | for (i = 0; | |
1604 | i < 3 && isdigit (*tokptr) && *tokptr != '8' && *tokptr != '9'; | |
1605 | ++i) | |
1606 | { | |
1607 | if (output) | |
1608 | obstack_1grow (output, *tokptr); | |
1609 | ++tokptr; | |
1610 | } | |
1611 | } | |
6c7a06a3 TT |
1612 | break; |
1613 | ||
1614 | /* We handle UCNs later. We could handle them here, but that | |
1615 | would mean a spurious error in the case where the UCN could | |
1616 | be converted to the target charset but not the host | |
1617 | charset. */ | |
1618 | case 'u': | |
1619 | case 'U': | |
1620 | { | |
1621 | char c = *tokptr; | |
1622 | int i, len = c == 'U' ? 8 : 4; | |
1623 | if (output) | |
1624 | { | |
1625 | obstack_1grow (output, '\\'); | |
1626 | obstack_1grow (output, *tokptr); | |
1627 | } | |
1628 | ++tokptr; | |
1629 | if (!isxdigit (*tokptr)) | |
1630 | error (_("\\%c escape without a following hex digit"), c); | |
1631 | for (i = 0; i < len && isxdigit (*tokptr); ++i) | |
1632 | { | |
1633 | if (output) | |
1634 | obstack_1grow (output, *tokptr); | |
1635 | ++tokptr; | |
1636 | } | |
1637 | } | |
1638 | break; | |
1639 | ||
1640 | /* We must pass backslash through so that it does not | |
1641 | cause quoting during the second expansion. */ | |
1642 | case '\\': | |
1643 | if (output) | |
1644 | obstack_grow_str (output, "\\\\"); | |
1645 | ++tokptr; | |
1646 | break; | |
1647 | ||
1648 | /* Escapes which undergo conversion. */ | |
1649 | case 'a': | |
1650 | if (output) | |
1651 | obstack_1grow (output, '\a'); | |
1652 | ++tokptr; | |
1653 | break; | |
1654 | case 'b': | |
1655 | if (output) | |
1656 | obstack_1grow (output, '\b'); | |
1657 | ++tokptr; | |
1658 | break; | |
1659 | case 'f': | |
1660 | if (output) | |
1661 | obstack_1grow (output, '\f'); | |
1662 | ++tokptr; | |
1663 | break; | |
1664 | case 'n': | |
1665 | if (output) | |
1666 | obstack_1grow (output, '\n'); | |
1667 | ++tokptr; | |
1668 | break; | |
1669 | case 'r': | |
1670 | if (output) | |
1671 | obstack_1grow (output, '\r'); | |
1672 | ++tokptr; | |
1673 | break; | |
1674 | case 't': | |
1675 | if (output) | |
1676 | obstack_1grow (output, '\t'); | |
1677 | ++tokptr; | |
1678 | break; | |
1679 | case 'v': | |
1680 | if (output) | |
1681 | obstack_1grow (output, '\v'); | |
1682 | ++tokptr; | |
1683 | break; | |
1684 | ||
1685 | /* GCC extension. */ | |
1686 | case 'e': | |
1687 | if (output) | |
1688 | obstack_1grow (output, HOST_ESCAPE_CHAR); | |
1689 | ++tokptr; | |
1690 | break; | |
1691 | ||
1692 | /* Backslash-newline expands to nothing at all. */ | |
1693 | case '\n': | |
1694 | ++tokptr; | |
1695 | result = 0; | |
1696 | break; | |
1697 | ||
1698 | /* A few escapes just expand to the character itself. */ | |
1699 | case '\'': | |
1700 | case '\"': | |
1701 | case '?': | |
1702 | /* GCC extensions. */ | |
1703 | case '(': | |
1704 | case '{': | |
1705 | case '[': | |
1706 | case '%': | |
1707 | /* Unrecognized escapes turn into the character itself. */ | |
1708 | default: | |
1709 | if (output) | |
1710 | obstack_1grow (output, *tokptr); | |
1711 | ++tokptr; | |
1712 | break; | |
1713 | } | |
1714 | *ptr = tokptr; | |
1715 | return result; | |
1716 | } | |
1717 | ||
1718 | /* Parse a string or character literal from TOKPTR. The string or | |
1719 | character may be wide or unicode. *OUTPTR is set to just after the | |
1720 | end of the literal in the input string. The resulting token is | |
1721 | stored in VALUE. This returns a token value, either STRING or | |
1722 | CHAR, depending on what was parsed. *HOST_CHARS is set to the | |
1723 | number of host characters in the literal. */ | |
1724 | static int | |
1725 | parse_string_or_char (char *tokptr, char **outptr, struct typed_stoken *value, | |
1726 | int *host_chars) | |
1727 | { | |
1728 | int quote, i; | |
1729 | enum c_string_type type; | |
1730 | ||
1731 | /* Build the gdb internal form of the input string in tempbuf. Note | |
1732 | that the buffer is null byte terminated *only* for the | |
1733 | convenience of debugging gdb itself and printing the buffer | |
1734 | contents when the buffer contains no embedded nulls. Gdb does | |
1735 | not depend upon the buffer being null byte terminated, it uses | |
1736 | the length string instead. This allows gdb to handle C strings | |
1737 | (as well as strings in other languages) with embedded null | |
1738 | bytes */ | |
1739 | ||
1740 | if (!tempbuf_init) | |
1741 | tempbuf_init = 1; | |
1742 | else | |
1743 | obstack_free (&tempbuf, NULL); | |
1744 | obstack_init (&tempbuf); | |
1745 | ||
1746 | /* Record the string type. */ | |
1747 | if (*tokptr == 'L') | |
1748 | { | |
1749 | type = C_WIDE_STRING; | |
1750 | ++tokptr; | |
1751 | } | |
1752 | else if (*tokptr == 'u') | |
1753 | { | |
1754 | type = C_STRING_16; | |
1755 | ++tokptr; | |
1756 | } | |
1757 | else if (*tokptr == 'U') | |
1758 | { | |
1759 | type = C_STRING_32; | |
1760 | ++tokptr; | |
1761 | } | |
1762 | else | |
1763 | type = C_STRING; | |
1764 | ||
1765 | /* Skip the quote. */ | |
1766 | quote = *tokptr; | |
1767 | if (quote == '\'') | |
1768 | type |= C_CHAR; | |
1769 | ++tokptr; | |
1770 | ||
1771 | *host_chars = 0; | |
1772 | ||
1773 | while (*tokptr) | |
1774 | { | |
1775 | char c = *tokptr; | |
1776 | if (c == '\\') | |
1777 | { | |
1778 | ++tokptr; | |
1779 | *host_chars += c_parse_escape (&tokptr, &tempbuf); | |
1780 | } | |
1781 | else if (c == quote) | |
1782 | break; | |
1783 | else | |
1784 | { | |
1785 | obstack_1grow (&tempbuf, c); | |
1786 | ++tokptr; | |
1787 | /* FIXME: this does the wrong thing with multi-byte host | |
1788 | characters. We could use mbrlen here, but that would | |
1789 | make "set host-charset" a bit less useful. */ | |
1790 | ++*host_chars; | |
1791 | } | |
1792 | } | |
1793 | ||
1794 | if (*tokptr != quote) | |
1795 | { | |
1796 | if (quote == '"') | |
1797 | error ("Unterminated string in expression."); | |
1798 | else | |
1799 | error ("Unmatched single quote."); | |
1800 | } | |
1801 | ++tokptr; | |
1802 | ||
1803 | value->type = type; | |
1804 | value->ptr = obstack_base (&tempbuf); | |
1805 | value->length = obstack_object_size (&tempbuf); | |
1806 | ||
1807 | *outptr = tokptr; | |
1808 | ||
1809 | return quote == '"' ? STRING : CHAR; | |
1810 | } | |
1811 | ||
c906108c SS |
1812 | struct token |
1813 | { | |
1814 | char *operator; | |
1815 | int token; | |
1816 | enum exp_opcode opcode; | |
ba163c7e | 1817 | int cxx_only; |
c906108c SS |
1818 | }; |
1819 | ||
1820 | static const struct token tokentab3[] = | |
1821 | { | |
ba163c7e | 1822 | {">>=", ASSIGN_MODIFY, BINOP_RSH, 0}, |
c1af96a0 KS |
1823 | {"<<=", ASSIGN_MODIFY, BINOP_LSH, 0}, |
1824 | {"->*", ARROW_STAR, BINOP_END, 1} | |
c906108c SS |
1825 | }; |
1826 | ||
1827 | static const struct token tokentab2[] = | |
1828 | { | |
ba163c7e TT |
1829 | {"+=", ASSIGN_MODIFY, BINOP_ADD, 0}, |
1830 | {"-=", ASSIGN_MODIFY, BINOP_SUB, 0}, | |
1831 | {"*=", ASSIGN_MODIFY, BINOP_MUL, 0}, | |
1832 | {"/=", ASSIGN_MODIFY, BINOP_DIV, 0}, | |
1833 | {"%=", ASSIGN_MODIFY, BINOP_REM, 0}, | |
1834 | {"|=", ASSIGN_MODIFY, BINOP_BITWISE_IOR, 0}, | |
1835 | {"&=", ASSIGN_MODIFY, BINOP_BITWISE_AND, 0}, | |
1836 | {"^=", ASSIGN_MODIFY, BINOP_BITWISE_XOR, 0}, | |
1837 | {"++", INCREMENT, BINOP_END, 0}, | |
1838 | {"--", DECREMENT, BINOP_END, 0}, | |
1839 | {"->", ARROW, BINOP_END, 0}, | |
1840 | {"&&", ANDAND, BINOP_END, 0}, | |
1841 | {"||", OROR, BINOP_END, 0}, | |
ec7f2efe KS |
1842 | /* "::" is *not* only C++: gdb overrides its meaning in several |
1843 | different ways, e.g., 'filename'::func, function::variable. */ | |
ba163c7e TT |
1844 | {"::", COLONCOLON, BINOP_END, 0}, |
1845 | {"<<", LSH, BINOP_END, 0}, | |
1846 | {">>", RSH, BINOP_END, 0}, | |
1847 | {"==", EQUAL, BINOP_END, 0}, | |
1848 | {"!=", NOTEQUAL, BINOP_END, 0}, | |
1849 | {"<=", LEQ, BINOP_END, 0}, | |
c1af96a0 | 1850 | {">=", GEQ, BINOP_END, 0}, |
ec7f2efe | 1851 | {".*", DOT_STAR, BINOP_END, 1} |
ba163c7e TT |
1852 | }; |
1853 | ||
1854 | /* Identifier-like tokens. */ | |
1855 | static const struct token ident_tokens[] = | |
1856 | { | |
1857 | {"unsigned", UNSIGNED, OP_NULL, 0}, | |
1858 | {"template", TEMPLATE, OP_NULL, 1}, | |
1859 | {"volatile", VOLATILE_KEYWORD, OP_NULL, 0}, | |
1860 | {"struct", STRUCT, OP_NULL, 0}, | |
1861 | {"signed", SIGNED_KEYWORD, OP_NULL, 0}, | |
1862 | {"sizeof", SIZEOF, OP_NULL, 0}, | |
1863 | {"double", DOUBLE_KEYWORD, OP_NULL, 0}, | |
1864 | {"false", FALSEKEYWORD, OP_NULL, 1}, | |
1865 | {"class", CLASS, OP_NULL, 1}, | |
1866 | {"union", UNION, OP_NULL, 0}, | |
1867 | {"short", SHORT, OP_NULL, 0}, | |
1868 | {"const", CONST_KEYWORD, OP_NULL, 0}, | |
1869 | {"enum", ENUM, OP_NULL, 0}, | |
1870 | {"long", LONG, OP_NULL, 0}, | |
1871 | {"true", TRUEKEYWORD, OP_NULL, 1}, | |
1872 | {"int", INT_KEYWORD, OP_NULL, 0}, | |
66c53f2b KS |
1873 | {"new", NEW, OP_NULL, 1}, |
1874 | {"delete", DELETE, OP_NULL, 1}, | |
1875 | {"operator", OPERATOR, OP_NULL, 1}, | |
ba163c7e TT |
1876 | |
1877 | {"and", ANDAND, BINOP_END, 1}, | |
1878 | {"and_eq", ASSIGN_MODIFY, BINOP_BITWISE_AND, 1}, | |
1879 | {"bitand", '&', OP_NULL, 1}, | |
1880 | {"bitor", '|', OP_NULL, 1}, | |
1881 | {"compl", '~', OP_NULL, 1}, | |
1882 | {"not", '!', OP_NULL, 1}, | |
1883 | {"not_eq", NOTEQUAL, BINOP_END, 1}, | |
1884 | {"or", OROR, BINOP_END, 1}, | |
1885 | {"or_eq", ASSIGN_MODIFY, BINOP_BITWISE_IOR, 1}, | |
1886 | {"xor", '^', OP_NULL, 1}, | |
1887 | {"xor_eq", ASSIGN_MODIFY, BINOP_BITWISE_XOR, 1} | |
c906108c SS |
1888 | }; |
1889 | ||
7c8adf68 TT |
1890 | /* When we find that lexptr (the global var defined in parse.c) is |
1891 | pointing at a macro invocation, we expand the invocation, and call | |
1892 | scan_macro_expansion to save the old lexptr here and point lexptr | |
1893 | into the expanded text. When we reach the end of that, we call | |
1894 | end_macro_expansion to pop back to the value we saved here. The | |
1895 | macro expansion code promises to return only fully-expanded text, | |
1896 | so we don't need to "push" more than one level. | |
1897 | ||
1898 | This is disgusting, of course. It would be cleaner to do all macro | |
1899 | expansion beforehand, and then hand that to lexptr. But we don't | |
1900 | really know where the expression ends. Remember, in a command like | |
1901 | ||
1902 | (gdb) break *ADDRESS if CONDITION | |
1903 | ||
1904 | we evaluate ADDRESS in the scope of the current frame, but we | |
1905 | evaluate CONDITION in the scope of the breakpoint's location. So | |
1906 | it's simply wrong to try to macro-expand the whole thing at once. */ | |
1907 | static char *macro_original_text; | |
1908 | ||
1909 | /* We save all intermediate macro expansions on this obstack for the | |
1910 | duration of a single parse. The expansion text may sometimes have | |
1911 | to live past the end of the expansion, due to yacc lookahead. | |
1912 | Rather than try to be clever about saving the data for a single | |
1913 | token, we simply keep it all and delete it after parsing has | |
1914 | completed. */ | |
1915 | static struct obstack expansion_obstack; | |
1916 | ||
1917 | static void | |
1918 | scan_macro_expansion (char *expansion) | |
1919 | { | |
1920 | char *copy; | |
1921 | ||
1922 | /* We'd better not be trying to push the stack twice. */ | |
1923 | gdb_assert (! macro_original_text); | |
1924 | ||
1925 | /* Copy to the obstack, and then free the intermediate | |
1926 | expansion. */ | |
1927 | copy = obstack_copy0 (&expansion_obstack, expansion, strlen (expansion)); | |
1928 | xfree (expansion); | |
1929 | ||
1930 | /* Save the old lexptr value, so we can return to it when we're done | |
1931 | parsing the expanded text. */ | |
1932 | macro_original_text = lexptr; | |
1933 | lexptr = copy; | |
1934 | } | |
1935 | ||
1936 | ||
1937 | static int | |
1938 | scanning_macro_expansion (void) | |
1939 | { | |
1940 | return macro_original_text != 0; | |
1941 | } | |
1942 | ||
1943 | ||
1944 | static void | |
1945 | finished_macro_expansion (void) | |
1946 | { | |
1947 | /* There'd better be something to pop back to. */ | |
1948 | gdb_assert (macro_original_text); | |
1949 | ||
1950 | /* Pop back to the original text. */ | |
1951 | lexptr = macro_original_text; | |
1952 | macro_original_text = 0; | |
1953 | } | |
1954 | ||
1955 | ||
1956 | static void | |
1957 | scan_macro_cleanup (void *dummy) | |
1958 | { | |
1959 | if (macro_original_text) | |
1960 | finished_macro_expansion (); | |
1961 | ||
1962 | obstack_free (&expansion_obstack, NULL); | |
1963 | } | |
1964 | ||
1965 | ||
1966 | /* The scope used for macro expansion. */ | |
1967 | static struct macro_scope *expression_macro_scope; | |
1968 | ||
65d12d83 TT |
1969 | /* This is set if a NAME token appeared at the very end of the input |
1970 | string, with no whitespace separating the name from the EOF. This | |
1971 | is used only when parsing to do field name completion. */ | |
1972 | static int saw_name_at_eof; | |
1973 | ||
1974 | /* This is set if the previously-returned token was a structure | |
1975 | operator -- either '.' or ARROW. This is used only when parsing to | |
1976 | do field name completion. */ | |
1977 | static int last_was_structop; | |
1978 | ||
c906108c SS |
1979 | /* Read one token, getting characters through lexptr. */ |
1980 | ||
1981 | static int | |
68c1b02d | 1982 | yylex (void) |
c906108c SS |
1983 | { |
1984 | int c; | |
1985 | int namelen; | |
1986 | unsigned int i; | |
1987 | char *tokstart; | |
65d12d83 | 1988 | int saw_structop = last_was_structop; |
ba163c7e | 1989 | char *copy; |
65d12d83 TT |
1990 | |
1991 | last_was_structop = 0; | |
1992 | ||
c906108c SS |
1993 | retry: |
1994 | ||
84f0252a JB |
1995 | /* Check if this is a macro invocation that we need to expand. */ |
1996 | if (! scanning_macro_expansion ()) | |
1997 | { | |
1998 | char *expanded = macro_expand_next (&lexptr, | |
7c8adf68 TT |
1999 | standard_macro_lookup, |
2000 | expression_macro_scope); | |
84f0252a JB |
2001 | |
2002 | if (expanded) | |
2003 | scan_macro_expansion (expanded); | |
2004 | } | |
2005 | ||
665132f9 | 2006 | prev_lexptr = lexptr; |
c906108c SS |
2007 | |
2008 | tokstart = lexptr; | |
2009 | /* See if it is a special token of length 3. */ | |
2010 | for (i = 0; i < sizeof tokentab3 / sizeof tokentab3[0]; i++) | |
bf896cb0 | 2011 | if (strncmp (tokstart, tokentab3[i].operator, 3) == 0) |
c906108c | 2012 | { |
ec7f2efe KS |
2013 | if (tokentab3[i].cxx_only |
2014 | && parse_language->la_language != language_cplus) | |
2015 | break; | |
2016 | ||
c906108c SS |
2017 | lexptr += 3; |
2018 | yylval.opcode = tokentab3[i].opcode; | |
2019 | return tokentab3[i].token; | |
2020 | } | |
2021 | ||
2022 | /* See if it is a special token of length 2. */ | |
2023 | for (i = 0; i < sizeof tokentab2 / sizeof tokentab2[0]; i++) | |
bf896cb0 | 2024 | if (strncmp (tokstart, tokentab2[i].operator, 2) == 0) |
c906108c | 2025 | { |
ec7f2efe KS |
2026 | if (tokentab2[i].cxx_only |
2027 | && parse_language->la_language != language_cplus) | |
2028 | break; | |
2029 | ||
c906108c SS |
2030 | lexptr += 2; |
2031 | yylval.opcode = tokentab2[i].opcode; | |
37cd5d19 | 2032 | if (in_parse_field && tokentab2[i].token == ARROW) |
65d12d83 | 2033 | last_was_structop = 1; |
c906108c SS |
2034 | return tokentab2[i].token; |
2035 | } | |
2036 | ||
2037 | switch (c = *tokstart) | |
2038 | { | |
2039 | case 0: | |
84f0252a JB |
2040 | /* If we were just scanning the result of a macro expansion, |
2041 | then we need to resume scanning the original text. | |
65d12d83 TT |
2042 | If we're parsing for field name completion, and the previous |
2043 | token allows such completion, return a COMPLETE token. | |
84f0252a JB |
2044 | Otherwise, we were already scanning the original text, and |
2045 | we're really done. */ | |
2046 | if (scanning_macro_expansion ()) | |
2047 | { | |
2048 | finished_macro_expansion (); | |
2049 | goto retry; | |
2050 | } | |
65d12d83 TT |
2051 | else if (saw_name_at_eof) |
2052 | { | |
2053 | saw_name_at_eof = 0; | |
2054 | return COMPLETE; | |
2055 | } | |
2056 | else if (saw_structop) | |
2057 | return COMPLETE; | |
84f0252a JB |
2058 | else |
2059 | return 0; | |
c906108c SS |
2060 | |
2061 | case ' ': | |
2062 | case '\t': | |
2063 | case '\n': | |
2064 | lexptr++; | |
2065 | goto retry; | |
2066 | ||
379a77b5 | 2067 | case '[': |
c906108c SS |
2068 | case '(': |
2069 | paren_depth++; | |
2070 | lexptr++; | |
2071 | return c; | |
2072 | ||
379a77b5 | 2073 | case ']': |
c906108c SS |
2074 | case ')': |
2075 | if (paren_depth == 0) | |
2076 | return 0; | |
2077 | paren_depth--; | |
2078 | lexptr++; | |
2079 | return c; | |
2080 | ||
2081 | case ',': | |
84f0252a JB |
2082 | if (comma_terminates |
2083 | && paren_depth == 0 | |
2084 | && ! scanning_macro_expansion ()) | |
c906108c SS |
2085 | return 0; |
2086 | lexptr++; | |
2087 | return c; | |
2088 | ||
2089 | case '.': | |
2090 | /* Might be a floating point number. */ | |
2091 | if (lexptr[1] < '0' || lexptr[1] > '9') | |
65d12d83 TT |
2092 | { |
2093 | if (in_parse_field) | |
2094 | last_was_structop = 1; | |
2095 | goto symbol; /* Nope, must be a symbol. */ | |
2096 | } | |
c906108c SS |
2097 | /* FALL THRU into number case. */ |
2098 | ||
2099 | case '0': | |
2100 | case '1': | |
2101 | case '2': | |
2102 | case '3': | |
2103 | case '4': | |
2104 | case '5': | |
2105 | case '6': | |
2106 | case '7': | |
2107 | case '8': | |
2108 | case '9': | |
2109 | { | |
2110 | /* It's a number. */ | |
2111 | int got_dot = 0, got_e = 0, toktype; | |
710122da | 2112 | char *p = tokstart; |
c906108c SS |
2113 | int hex = input_radix > 10; |
2114 | ||
2115 | if (c == '0' && (p[1] == 'x' || p[1] == 'X')) | |
2116 | { | |
2117 | p += 2; | |
2118 | hex = 1; | |
2119 | } | |
2120 | else if (c == '0' && (p[1]=='t' || p[1]=='T' || p[1]=='d' || p[1]=='D')) | |
2121 | { | |
2122 | p += 2; | |
2123 | hex = 0; | |
2124 | } | |
2125 | ||
2126 | for (;; ++p) | |
2127 | { | |
2128 | /* This test includes !hex because 'e' is a valid hex digit | |
2129 | and thus does not indicate a floating point number when | |
2130 | the radix is hex. */ | |
2131 | if (!hex && !got_e && (*p == 'e' || *p == 'E')) | |
2132 | got_dot = got_e = 1; | |
2133 | /* This test does not include !hex, because a '.' always indicates | |
2134 | a decimal floating point number regardless of the radix. */ | |
2135 | else if (!got_dot && *p == '.') | |
2136 | got_dot = 1; | |
2137 | else if (got_e && (p[-1] == 'e' || p[-1] == 'E') | |
2138 | && (*p == '-' || *p == '+')) | |
2139 | /* This is the sign of the exponent, not the end of the | |
2140 | number. */ | |
2141 | continue; | |
2142 | /* We will take any letters or digits. parse_number will | |
2143 | complain if past the radix, or if L or U are not final. */ | |
2144 | else if ((*p < '0' || *p > '9') | |
2145 | && ((*p < 'a' || *p > 'z') | |
2146 | && (*p < 'A' || *p > 'Z'))) | |
2147 | break; | |
2148 | } | |
2149 | toktype = parse_number (tokstart, p - tokstart, got_dot|got_e, &yylval); | |
2150 | if (toktype == ERROR) | |
2151 | { | |
2152 | char *err_copy = (char *) alloca (p - tokstart + 1); | |
2153 | ||
2154 | memcpy (err_copy, tokstart, p - tokstart); | |
2155 | err_copy[p - tokstart] = 0; | |
2156 | error ("Invalid number \"%s\".", err_copy); | |
2157 | } | |
2158 | lexptr = p; | |
2159 | return toktype; | |
2160 | } | |
2161 | ||
2162 | case '+': | |
2163 | case '-': | |
2164 | case '*': | |
2165 | case '/': | |
2166 | case '%': | |
2167 | case '|': | |
2168 | case '&': | |
2169 | case '^': | |
2170 | case '~': | |
2171 | case '!': | |
2172 | case '@': | |
2173 | case '<': | |
2174 | case '>': | |
c906108c SS |
2175 | case '?': |
2176 | case ':': | |
2177 | case '=': | |
2178 | case '{': | |
2179 | case '}': | |
2180 | symbol: | |
2181 | lexptr++; | |
2182 | return c; | |
2183 | ||
6c7a06a3 TT |
2184 | case 'L': |
2185 | case 'u': | |
2186 | case 'U': | |
2187 | if (tokstart[1] != '"' && tokstart[1] != '\'') | |
2188 | break; | |
2189 | /* Fall through. */ | |
2190 | case '\'': | |
c906108c | 2191 | case '"': |
6c7a06a3 TT |
2192 | { |
2193 | int host_len; | |
2194 | int result = parse_string_or_char (tokstart, &lexptr, &yylval.tsval, | |
2195 | &host_len); | |
2196 | if (result == CHAR) | |
c906108c | 2197 | { |
6c7a06a3 TT |
2198 | if (host_len == 0) |
2199 | error ("Empty character constant."); | |
2200 | else if (host_len > 2 && c == '\'') | |
c906108c | 2201 | { |
6c7a06a3 TT |
2202 | ++tokstart; |
2203 | namelen = lexptr - tokstart - 1; | |
2204 | goto tryname; | |
c906108c | 2205 | } |
6c7a06a3 TT |
2206 | else if (host_len > 1) |
2207 | error ("Invalid character constant."); | |
c906108c | 2208 | } |
6c7a06a3 TT |
2209 | return result; |
2210 | } | |
c906108c SS |
2211 | } |
2212 | ||
2213 | if (!(c == '_' || c == '$' | |
2214 | || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))) | |
2215 | /* We must have come across a bad character (e.g. ';'). */ | |
2216 | error ("Invalid character '%c' in expression.", c); | |
2217 | ||
2218 | /* It's a name. See how long it is. */ | |
2219 | namelen = 0; | |
2220 | for (c = tokstart[namelen]; | |
2221 | (c == '_' || c == '$' || (c >= '0' && c <= '9') | |
2222 | || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '<');) | |
2223 | { | |
2224 | /* Template parameter lists are part of the name. | |
2225 | FIXME: This mishandles `print $a<4&&$a>3'. */ | |
2226 | ||
2227 | if (c == '<') | |
2228 | { | |
c906108c SS |
2229 | /* Scan ahead to get rest of the template specification. Note |
2230 | that we look ahead only when the '<' adjoins non-whitespace | |
2231 | characters; for comparison expressions, e.g. "a < b > c", | |
2232 | there must be spaces before the '<', etc. */ | |
2233 | ||
2234 | char * p = find_template_name_end (tokstart + namelen); | |
2235 | if (p) | |
2236 | namelen = p - tokstart; | |
2237 | break; | |
c906108c SS |
2238 | } |
2239 | c = tokstart[++namelen]; | |
2240 | } | |
2241 | ||
84f0252a JB |
2242 | /* The token "if" terminates the expression and is NOT removed from |
2243 | the input stream. It doesn't count if it appears in the | |
2244 | expansion of a macro. */ | |
2245 | if (namelen == 2 | |
2246 | && tokstart[0] == 'i' | |
2247 | && tokstart[1] == 'f' | |
2248 | && ! scanning_macro_expansion ()) | |
c906108c SS |
2249 | { |
2250 | return 0; | |
2251 | } | |
2252 | ||
b6199126 DJ |
2253 | /* For the same reason (breakpoint conditions), "thread N" |
2254 | terminates the expression. "thread" could be an identifier, but | |
2255 | an identifier is never followed by a number without intervening | |
2256 | punctuation. "task" is similar. Handle abbreviations of these, | |
2257 | similarly to breakpoint.c:find_condition_and_thread. */ | |
2258 | if (namelen >= 1 | |
2259 | && (strncmp (tokstart, "thread", namelen) == 0 | |
2260 | || strncmp (tokstart, "task", namelen) == 0) | |
2261 | && (tokstart[namelen] == ' ' || tokstart[namelen] == '\t') | |
2262 | && ! scanning_macro_expansion ()) | |
2263 | { | |
2264 | char *p = tokstart + namelen + 1; | |
2265 | while (*p == ' ' || *p == '\t') | |
2266 | p++; | |
2267 | if (*p >= '0' && *p <= '9') | |
2268 | return 0; | |
2269 | } | |
2270 | ||
c906108c SS |
2271 | lexptr += namelen; |
2272 | ||
2273 | tryname: | |
2274 | ||
c906108c SS |
2275 | yylval.sval.ptr = tokstart; |
2276 | yylval.sval.length = namelen; | |
2277 | ||
ba163c7e TT |
2278 | /* Catch specific keywords. */ |
2279 | copy = copy_name (yylval.sval); | |
2280 | for (i = 0; i < sizeof ident_tokens / sizeof ident_tokens[0]; i++) | |
2281 | if (strcmp (copy, ident_tokens[i].operator) == 0) | |
2282 | { | |
2283 | if (ident_tokens[i].cxx_only | |
2284 | && parse_language->la_language != language_cplus) | |
2285 | break; | |
2286 | ||
2287 | /* It is ok to always set this, even though we don't always | |
2288 | strictly need to. */ | |
2289 | yylval.opcode = ident_tokens[i].opcode; | |
2290 | return ident_tokens[i].token; | |
2291 | } | |
2292 | ||
c906108c SS |
2293 | if (*tokstart == '$') |
2294 | { | |
2295 | write_dollar_variable (yylval.sval); | |
2296 | return VARIABLE; | |
2297 | } | |
2298 | ||
c906108c SS |
2299 | /* Use token-type BLOCKNAME for symbols that happen to be defined as |
2300 | functions or symtabs. If this is not so, then ... | |
2301 | Use token-type TYPENAME for symbols that happen to be defined | |
2302 | currently as names of types; NAME for other symbols. | |
2303 | The caller is not constrained to care about the distinction. */ | |
2304 | { | |
c906108c SS |
2305 | struct symbol *sym; |
2306 | int is_a_field_of_this = 0; | |
2307 | int hextype; | |
2308 | ||
ba163c7e | 2309 | sym = lookup_symbol (copy, expression_context_block, |
176620f1 | 2310 | VAR_DOMAIN, |
3e79cecf | 2311 | parse_language->la_language == language_cplus |
2570f2b7 | 2312 | ? &is_a_field_of_this : (int *) NULL); |
c906108c SS |
2313 | /* Call lookup_symtab, not lookup_partial_symtab, in case there are |
2314 | no psymtabs (coff, xcoff, or some future change to blow away the | |
2315 | psymtabs once once symbols are read). */ | |
2316 | if (sym && SYMBOL_CLASS (sym) == LOC_BLOCK) | |
2317 | { | |
2318 | yylval.ssym.sym = sym; | |
2319 | yylval.ssym.is_a_field_of_this = is_a_field_of_this; | |
2320 | return BLOCKNAME; | |
2321 | } | |
2322 | else if (!sym) | |
2323 | { /* See if it's a file name. */ | |
2324 | struct symtab *symtab; | |
2325 | ||
ba163c7e | 2326 | symtab = lookup_symtab (copy); |
c906108c SS |
2327 | |
2328 | if (symtab) | |
2329 | { | |
2330 | yylval.bval = BLOCKVECTOR_BLOCK (BLOCKVECTOR (symtab), STATIC_BLOCK); | |
2331 | return FILENAME; | |
2332 | } | |
2333 | } | |
2334 | ||
2335 | if (sym && SYMBOL_CLASS (sym) == LOC_TYPEDEF) | |
2336 | { | |
79c2c32d DC |
2337 | /* NOTE: carlton/2003-09-25: There used to be code here to |
2338 | handle nested types. It didn't work very well. See the | |
2339 | comment before qualified_type for more info. */ | |
c906108c | 2340 | yylval.tsym.type = SYMBOL_TYPE (sym); |
c906108c SS |
2341 | return TYPENAME; |
2342 | } | |
54a5b07d | 2343 | yylval.tsym.type |
3e79cecf | 2344 | = language_lookup_primitive_type_by_name (parse_language, |
ba163c7e | 2345 | parse_gdbarch, copy); |
54a5b07d | 2346 | if (yylval.tsym.type != NULL) |
47663de5 | 2347 | return TYPENAME; |
c906108c SS |
2348 | |
2349 | /* Input names that aren't symbols but ARE valid hex numbers, | |
2350 | when the input radix permits them, can be names or numbers | |
2351 | depending on the parse. Note we support radixes > 16 here. */ | |
5aafa1cc PM |
2352 | if (!sym |
2353 | && ((tokstart[0] >= 'a' && tokstart[0] < 'a' + input_radix - 10) | |
2354 | || (tokstart[0] >= 'A' && tokstart[0] < 'A' + input_radix - 10))) | |
c906108c SS |
2355 | { |
2356 | YYSTYPE newlval; /* Its value is ignored. */ | |
2357 | hextype = parse_number (tokstart, namelen, 0, &newlval); | |
2358 | if (hextype == INT) | |
2359 | { | |
2360 | yylval.ssym.sym = sym; | |
2361 | yylval.ssym.is_a_field_of_this = is_a_field_of_this; | |
2362 | return NAME_OR_INT; | |
2363 | } | |
2364 | } | |
2365 | ||
2366 | /* Any other kind of symbol */ | |
2367 | yylval.ssym.sym = sym; | |
2368 | yylval.ssym.is_a_field_of_this = is_a_field_of_this; | |
65d12d83 TT |
2369 | if (in_parse_field && *lexptr == '\0') |
2370 | saw_name_at_eof = 1; | |
c906108c SS |
2371 | return NAME; |
2372 | } | |
2373 | } | |
2374 | ||
65d12d83 TT |
2375 | int |
2376 | c_parse (void) | |
2377 | { | |
7c8adf68 TT |
2378 | int result; |
2379 | struct cleanup *back_to = make_cleanup (free_current_contents, | |
2380 | &expression_macro_scope); | |
2381 | ||
2382 | /* Set up the scope for macro expansion. */ | |
2383 | expression_macro_scope = NULL; | |
2384 | ||
2385 | if (expression_context_block) | |
2386 | expression_macro_scope | |
2387 | = sal_macro_scope (find_pc_line (expression_context_pc, 0)); | |
2388 | else | |
2389 | expression_macro_scope = default_macro_scope (); | |
2390 | if (! expression_macro_scope) | |
2391 | expression_macro_scope = user_macro_scope (); | |
2392 | ||
2393 | /* Initialize macro expansion code. */ | |
2394 | obstack_init (&expansion_obstack); | |
2395 | gdb_assert (! macro_original_text); | |
2396 | make_cleanup (scan_macro_cleanup, 0); | |
2397 | ||
2398 | /* Initialize some state used by the lexer. */ | |
65d12d83 TT |
2399 | last_was_structop = 0; |
2400 | saw_name_at_eof = 0; | |
7c8adf68 TT |
2401 | |
2402 | result = yyparse (); | |
2403 | do_cleanups (back_to); | |
2404 | return result; | |
65d12d83 TT |
2405 | } |
2406 | ||
7c8adf68 | 2407 | |
c906108c | 2408 | void |
68c1b02d | 2409 | yyerror (char *msg) |
c906108c | 2410 | { |
665132f9 MS |
2411 | if (prev_lexptr) |
2412 | lexptr = prev_lexptr; | |
2413 | ||
c906108c SS |
2414 | error ("A %s in expression, near `%s'.", (msg ? msg : "error"), lexptr); |
2415 | } |