projects / deliverable / binutils-gdb.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
GDB copyright headers update after running GDB's copyright.py script.
[deliverable/binutils-gdb.git] / gdb / c-exp.y
1 /* YACC parser for C expressions, for GDB.
2 Copyright (C) 1986-2016 Free Software Foundation, Inc.
3
4 This file is part of GDB.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
18
19 /* Parse a C expression from text in a string,
20 and return the result as a struct expression pointer.
21 That structure contains arithmetic operations in reverse polish,
22 with constants represented by operations that are followed by special data.
23 See expression.h for the details of the format.
24 What is important here is that it can be built up sequentially
25 during the process of parsing; the lower levels of the tree always
26 come first in the result.
27
28 Note that malloc's and realloc's in this file are transformed to
29 xmalloc and xrealloc respectively by the same sed command in the
30 makefile that remaps any other malloc/realloc inserted by the parser
31 generator. Doing this with #defines and trying to control the interaction
32 with include files (<malloc.h> and <stdlib.h> for example) just became
33 too messy, particularly when such includes can be inserted at random
34 times by the parser generator. */
35
36 %{
37
38 #include "defs.h"
39 #include <ctype.h>
40 #include "expression.h"
41 #include "value.h"
42 #include "parser-defs.h"
43 #include "language.h"
44 #include "c-lang.h"
45 #include "bfd.h" /* Required by objfiles.h. */
46 #include "symfile.h" /* Required by objfiles.h. */
47 #include "objfiles.h" /* For have_full_symbols and have_partial_symbols */
48 #include "charset.h"
49 #include "block.h"
50 #include "cp-support.h"
51 #include "dfp.h"
52 #include "macroscope.h"
53 #include "objc-lang.h"
54 #include "typeprint.h"
55 #include "cp-abi.h"
56
57 #define parse_type(ps) builtin_type (parse_gdbarch (ps))
58
59 /* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc),
60 as well as gratuitiously global symbol names, so we can have multiple
61 yacc generated parsers in gdb. Note that these are only the variables
62 produced by yacc. If other parser generators (bison, byacc, etc) produce
63 additional global names that conflict at link time, then those parser
64 generators need to be fixed instead of adding those names to this list. */
65
66 #define yymaxdepth c_maxdepth
67 #define yyparse c_parse_internal
68 #define yylex c_lex
69 #define yyerror c_error
70 #define yylval c_lval
71 #define yychar c_char
72 #define yydebug c_debug
73 #define yypact c_pact
74 #define yyr1 c_r1
75 #define yyr2 c_r2
76 #define yydef c_def
77 #define yychk c_chk
78 #define yypgo c_pgo
79 #define yyact c_act
80 #define yyexca c_exca
81 #define yyerrflag c_errflag
82 #define yynerrs c_nerrs
83 #define yyps c_ps
84 #define yypv c_pv
85 #define yys c_s
86 #define yy_yys c_yys
87 #define yystate c_state
88 #define yytmp c_tmp
89 #define yyv c_v
90 #define yy_yyv c_yyv
91 #define yyval c_val
92 #define yylloc c_lloc
93 #define yyreds c_reds /* With YYDEBUG defined */
94 #define yytoks c_toks /* With YYDEBUG defined */
95 #define yyname c_name /* With YYDEBUG defined */
96 #define yyrule c_rule /* With YYDEBUG defined */
97 #define yylhs c_yylhs
98 #define yylen c_yylen
99 #define yydefred c_yydefred
100 #define yydgoto c_yydgoto
101 #define yysindex c_yysindex
102 #define yyrindex c_yyrindex
103 #define yygindex c_yygindex
104 #define yytable c_yytable
105 #define yycheck c_yycheck
106 #define yyss c_yyss
107 #define yysslim c_yysslim
108 #define yyssp c_yyssp
109 #define yystacksize c_yystacksize
110 #define yyvs c_yyvs
111 #define yyvsp c_yyvsp
112
113 #ifndef YYDEBUG
114 #define YYDEBUG 1 /* Default to yydebug support */
115 #endif
116
117 #define YYFPRINTF parser_fprintf
118
119 /* The state of the parser, used internally when we are parsing the
120 expression. */
121
122 static struct parser_state *pstate = NULL;
123
124 int yyparse (void);
125
126 static int yylex (void);
127
128 void yyerror (char *);
129
130 static int type_aggregate_p (struct type *);
131
132 %}
133
134 /* Although the yacc "value" of an expression is not used,
135 since the result is stored in the structure being created,
136 other node types do have values. */
137
138 %union
139 {
140 LONGEST lval;
141 struct {
142 LONGEST val;
143 struct type *type;
144 } typed_val_int;
145 struct {
146 DOUBLEST dval;
147 struct type *type;
148 } typed_val_float;
149 struct {
150 gdb_byte val[16];
151 struct type *type;
152 } typed_val_decfloat;
153 struct type *tval;
154 struct stoken sval;
155 struct typed_stoken tsval;
156 struct ttype tsym;
157 struct symtoken ssym;
158 int voidval;
159 const struct block *bval;
160 enum exp_opcode opcode;
161
162 struct stoken_vector svec;
163 VEC (type_ptr) *tvec;
164
165 struct type_stack *type_stack;
166
167 struct objc_class_str theclass;
168 }
169
170 %{
171 /* YYSTYPE gets defined by %union */
172 static int parse_number (struct parser_state *par_state,
173 const char *, int, int, YYSTYPE *);
174 static struct stoken operator_stoken (const char *);
175 static void check_parameter_typelist (VEC (type_ptr) *);
176 static void write_destructor_name (struct parser_state *par_state,
177 struct stoken);
178
179 #ifdef YYBISON
180 static void c_print_token (FILE *file, int type, YYSTYPE value);
181 #define YYPRINT(FILE, TYPE, VALUE) c_print_token (FILE, TYPE, VALUE)
182 #endif
183 %}
184
185 %type <voidval> exp exp1 type_exp start variable qualified_name lcurly
186 %type <lval> rcurly
187 %type <tval> type typebase
188 %type <tvec> nonempty_typelist func_mod parameter_typelist
189 /* %type <bval> block */
190
191 /* Fancy type parsing. */
192 %type <tval> ptype
193 %type <lval> array_mod
194 %type <tval> conversion_type_id
195
196 %type <type_stack> ptr_operator_ts abs_decl direct_abs_decl
197
198 %token <typed_val_int> INT
199 %token <typed_val_float> FLOAT
200 %token <typed_val_decfloat> DECFLOAT
201
202 /* Both NAME and TYPENAME tokens represent symbols in the input,
203 and both convey their data as strings.
204 But a TYPENAME is a string that happens to be defined as a typedef
205 or builtin type name (such as int or char)
206 and a NAME is any other symbol.
207 Contexts where this distinction is not important can use the
208 nonterminal "name", which matches either NAME or TYPENAME. */
209
210 %token <tsval> STRING
211 %token <sval> NSSTRING /* ObjC Foundation "NSString" literal */
212 %token SELECTOR /* ObjC "@selector" pseudo-operator */
213 %token <tsval> CHAR
214 %token <ssym> NAME /* BLOCKNAME defined below to give it higher precedence. */
215 %token <ssym> UNKNOWN_CPP_NAME
216 %token <voidval> COMPLETE
217 %token <tsym> TYPENAME
218 %token <theclass> CLASSNAME /* ObjC Class name */
219 %type <sval> name
220 %type <svec> string_exp
221 %type <ssym> name_not_typename
222 %type <tsym> type_name
223
224 /* This is like a '[' token, but is only generated when parsing
225 Objective C. This lets us reuse the same parser without
226 erroneously parsing ObjC-specific expressions in C. */
227 %token OBJC_LBRAC
228
229 /* A NAME_OR_INT is a symbol which is not known in the symbol table,
230 but which would parse as a valid number in the current input radix.
231 E.g. "c" when input_radix==16. Depending on the parse, it will be
232 turned into a name or into a number. */
233
234 %token <ssym> NAME_OR_INT
235
236 %token OPERATOR
237 %token STRUCT CLASS UNION ENUM SIZEOF UNSIGNED COLONCOLON
238 %token TEMPLATE
239 %token ERROR
240 %token NEW DELETE
241 %type <sval> oper
242 %token REINTERPRET_CAST DYNAMIC_CAST STATIC_CAST CONST_CAST
243 %token ENTRY
244 %token TYPEOF
245 %token DECLTYPE
246 %token TYPEID
247
248 /* Special type cases, put in to allow the parser to distinguish different
249 legal basetypes. */
250 %token SIGNED_KEYWORD LONG SHORT INT_KEYWORD CONST_KEYWORD VOLATILE_KEYWORD DOUBLE_KEYWORD
251
252 %token <sval> VARIABLE
253
254 %token <opcode> ASSIGN_MODIFY
255
256 /* C++ */
257 %token TRUEKEYWORD
258 %token FALSEKEYWORD
259
260
261 %left ','
262 %left ABOVE_COMMA
263 %right '=' ASSIGN_MODIFY
264 %right '?'
265 %left OROR
266 %left ANDAND
267 %left '|'
268 %left '^'
269 %left '&'
270 %left EQUAL NOTEQUAL
271 %left '<' '>' LEQ GEQ
272 %left LSH RSH
273 %left '@'
274 %left '+' '-'
275 %left '*' '/' '%'
276 %right UNARY INCREMENT DECREMENT
277 %right ARROW ARROW_STAR '.' DOT_STAR '[' OBJC_LBRAC '('
278 %token <ssym> BLOCKNAME
279 %token <bval> FILENAME
280 %type <bval> block
281 %left COLONCOLON
282
283 %token DOTDOTDOT
284
285 \f
286 %%
287
288 start : exp1
289 | type_exp
290 ;
291
292 type_exp: type
293 { write_exp_elt_opcode(pstate, OP_TYPE);
294 write_exp_elt_type(pstate, $1);
295 write_exp_elt_opcode(pstate, OP_TYPE);}
296 | TYPEOF '(' exp ')'
297 {
298 write_exp_elt_opcode (pstate, OP_TYPEOF);
299 }
300 | TYPEOF '(' type ')'
301 {
302 write_exp_elt_opcode (pstate, OP_TYPE);
303 write_exp_elt_type (pstate, $3);
304 write_exp_elt_opcode (pstate, OP_TYPE);
305 }
306 | DECLTYPE '(' exp ')'
307 {
308 write_exp_elt_opcode (pstate, OP_DECLTYPE);
309 }
310 ;
311
312 /* Expressions, including the comma operator. */
313 exp1 : exp
314 | exp1 ',' exp
315 { write_exp_elt_opcode (pstate, BINOP_COMMA); }
316 ;
317
318 /* Expressions, not including the comma operator. */
319 exp : '*' exp %prec UNARY
320 { write_exp_elt_opcode (pstate, UNOP_IND); }
321 ;
322
323 exp : '&' exp %prec UNARY
324 { write_exp_elt_opcode (pstate, UNOP_ADDR); }
325 ;
326
327 exp : '-' exp %prec UNARY
328 { write_exp_elt_opcode (pstate, UNOP_NEG); }
329 ;
330
331 exp : '+' exp %prec UNARY
332 { write_exp_elt_opcode (pstate, UNOP_PLUS); }
333 ;
334
335 exp : '!' exp %prec UNARY
336 { write_exp_elt_opcode (pstate, UNOP_LOGICAL_NOT); }
337 ;
338
339 exp : '~' exp %prec UNARY
340 { write_exp_elt_opcode (pstate, UNOP_COMPLEMENT); }
341 ;
342
343 exp : INCREMENT exp %prec UNARY
344 { write_exp_elt_opcode (pstate, UNOP_PREINCREMENT); }
345 ;
346
347 exp : DECREMENT exp %prec UNARY
348 { write_exp_elt_opcode (pstate, UNOP_PREDECREMENT); }
349 ;
350
351 exp : exp INCREMENT %prec UNARY
352 { write_exp_elt_opcode (pstate, UNOP_POSTINCREMENT); }
353 ;
354
355 exp : exp DECREMENT %prec UNARY
356 { write_exp_elt_opcode (pstate, UNOP_POSTDECREMENT); }
357 ;
358
359 exp : TYPEID '(' exp ')' %prec UNARY
360 { write_exp_elt_opcode (pstate, OP_TYPEID); }
361 ;
362
363 exp : TYPEID '(' type_exp ')' %prec UNARY
364 { write_exp_elt_opcode (pstate, OP_TYPEID); }
365 ;
366
367 exp : SIZEOF exp %prec UNARY
368 { write_exp_elt_opcode (pstate, UNOP_SIZEOF); }
369 ;
370
371 exp : exp ARROW name
372 { write_exp_elt_opcode (pstate, STRUCTOP_PTR);
373 write_exp_string (pstate, $3);
374 write_exp_elt_opcode (pstate, STRUCTOP_PTR); }
375 ;
376
377 exp : exp ARROW name COMPLETE
378 { mark_struct_expression (pstate);
379 write_exp_elt_opcode (pstate, STRUCTOP_PTR);
380 write_exp_string (pstate, $3);
381 write_exp_elt_opcode (pstate, STRUCTOP_PTR); }
382 ;
383
384 exp : exp ARROW COMPLETE
385 { struct stoken s;
386 mark_struct_expression (pstate);
387 write_exp_elt_opcode (pstate, STRUCTOP_PTR);
388 s.ptr = "";
389 s.length = 0;
390 write_exp_string (pstate, s);
391 write_exp_elt_opcode (pstate, STRUCTOP_PTR); }
392 ;
393
394 exp : exp ARROW '~' name
395 { write_exp_elt_opcode (pstate, STRUCTOP_PTR);
396 write_destructor_name (pstate, $4);
397 write_exp_elt_opcode (pstate, STRUCTOP_PTR); }
398 ;
399
400 exp : exp ARROW '~' name COMPLETE
401 { mark_struct_expression (pstate);
402 write_exp_elt_opcode (pstate, STRUCTOP_PTR);
403 write_destructor_name (pstate, $4);
404 write_exp_elt_opcode (pstate, STRUCTOP_PTR); }
405 ;
406
407 exp : exp ARROW qualified_name
408 { /* exp->type::name becomes exp->*(&type::name) */
409 /* Note: this doesn't work if name is a
410 static member! FIXME */
411 write_exp_elt_opcode (pstate, UNOP_ADDR);
412 write_exp_elt_opcode (pstate, STRUCTOP_MPTR); }
413 ;
414
415 exp : exp ARROW_STAR exp
416 { write_exp_elt_opcode (pstate, STRUCTOP_MPTR); }
417 ;
418
419 exp : exp '.' name
420 { write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
421 write_exp_string (pstate, $3);
422 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
423 ;
424
425 exp : exp '.' name COMPLETE
426 { mark_struct_expression (pstate);
427 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
428 write_exp_string (pstate, $3);
429 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
430 ;
431
432 exp : exp '.' COMPLETE
433 { struct stoken s;
434 mark_struct_expression (pstate);
435 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
436 s.ptr = "";
437 s.length = 0;
438 write_exp_string (pstate, s);
439 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
440 ;
441
442 exp : exp '.' '~' name
443 { write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
444 write_destructor_name (pstate, $4);
445 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
446 ;
447
448 exp : exp '.' '~' name COMPLETE
449 { mark_struct_expression (pstate);
450 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
451 write_destructor_name (pstate, $4);
452 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
453 ;
454
455 exp : exp '.' qualified_name
456 { /* exp.type::name becomes exp.*(&type::name) */
457 /* Note: this doesn't work if name is a
458 static member! FIXME */
459 write_exp_elt_opcode (pstate, UNOP_ADDR);
460 write_exp_elt_opcode (pstate, STRUCTOP_MEMBER); }
461 ;
462
463 exp : exp DOT_STAR exp
464 { write_exp_elt_opcode (pstate, STRUCTOP_MEMBER); }
465 ;
466
467 exp : exp '[' exp1 ']'
468 { write_exp_elt_opcode (pstate, BINOP_SUBSCRIPT); }
469 ;
470
471 exp : exp OBJC_LBRAC exp1 ']'
472 { write_exp_elt_opcode (pstate, BINOP_SUBSCRIPT); }
473 ;
474
475 /*
476 * The rules below parse ObjC message calls of the form:
477 * '[' target selector {':' argument}* ']'
478 */
479
480 exp : OBJC_LBRAC TYPENAME
481 {
482 CORE_ADDR theclass;
483
484 theclass = lookup_objc_class (parse_gdbarch (pstate),
485 copy_name ($2.stoken));
486 if (theclass == 0)
487 error (_("%s is not an ObjC Class"),
488 copy_name ($2.stoken));
489 write_exp_elt_opcode (pstate, OP_LONG);
490 write_exp_elt_type (pstate,
491 parse_type (pstate)->builtin_int);
492 write_exp_elt_longcst (pstate, (LONGEST) theclass);
493 write_exp_elt_opcode (pstate, OP_LONG);
494 start_msglist();
495 }
496 msglist ']'
497 { write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
498 end_msglist (pstate);
499 write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
500 }
501 ;
502
503 exp : OBJC_LBRAC CLASSNAME
504 {
505 write_exp_elt_opcode (pstate, OP_LONG);
506 write_exp_elt_type (pstate,
507 parse_type (pstate)->builtin_int);
508 write_exp_elt_longcst (pstate, (LONGEST) $2.theclass);
509 write_exp_elt_opcode (pstate, OP_LONG);
510 start_msglist();
511 }
512 msglist ']'
513 { write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
514 end_msglist (pstate);
515 write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
516 }
517 ;
518
519 exp : OBJC_LBRAC exp
520 { start_msglist(); }
521 msglist ']'
522 { write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
523 end_msglist (pstate);
524 write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
525 }
526 ;
527
528 msglist : name
529 { add_msglist(&$1, 0); }
530 | msgarglist
531 ;
532
533 msgarglist : msgarg
534 | msgarglist msgarg
535 ;
536
537 msgarg : name ':' exp
538 { add_msglist(&$1, 1); }
539 | ':' exp /* Unnamed arg. */
540 { add_msglist(0, 1); }
541 | ',' exp /* Variable number of args. */
542 { add_msglist(0, 0); }
543 ;
544
545 exp : exp '('
546 /* This is to save the value of arglist_len
547 being accumulated by an outer function call. */
548 { start_arglist (); }
549 arglist ')' %prec ARROW
550 { write_exp_elt_opcode (pstate, OP_FUNCALL);
551 write_exp_elt_longcst (pstate,
552 (LONGEST) end_arglist ());
553 write_exp_elt_opcode (pstate, OP_FUNCALL); }
554 ;
555
556 exp : UNKNOWN_CPP_NAME '('
557 {
558 /* This could potentially be a an argument defined
559 lookup function (Koenig). */
560 write_exp_elt_opcode (pstate, OP_ADL_FUNC);
561 write_exp_elt_block (pstate,
562 expression_context_block);
563 write_exp_elt_sym (pstate,
564 NULL); /* Placeholder. */
565 write_exp_string (pstate, $1.stoken);
566 write_exp_elt_opcode (pstate, OP_ADL_FUNC);
567
568 /* This is to save the value of arglist_len
569 being accumulated by an outer function call. */
570
571 start_arglist ();
572 }
573 arglist ')' %prec ARROW
574 {
575 write_exp_elt_opcode (pstate, OP_FUNCALL);
576 write_exp_elt_longcst (pstate,
577 (LONGEST) end_arglist ());
578 write_exp_elt_opcode (pstate, OP_FUNCALL);
579 }
580 ;
581
582 lcurly : '{'
583 { start_arglist (); }
584 ;
585
586 arglist :
587 ;
588
589 arglist : exp
590 { arglist_len = 1; }
591 ;
592
593 arglist : arglist ',' exp %prec ABOVE_COMMA
594 { arglist_len++; }
595 ;
596
597 exp : exp '(' parameter_typelist ')' const_or_volatile
598 { int i;
599 VEC (type_ptr) *type_list = $3;
600 struct type *type_elt;
601 LONGEST len = VEC_length (type_ptr, type_list);
602
603 write_exp_elt_opcode (pstate, TYPE_INSTANCE);
604 write_exp_elt_longcst (pstate, len);
605 for (i = 0;
606 VEC_iterate (type_ptr, type_list, i, type_elt);
607 ++i)
608 write_exp_elt_type (pstate, type_elt);
609 write_exp_elt_longcst(pstate, len);
610 write_exp_elt_opcode (pstate, TYPE_INSTANCE);
611 VEC_free (type_ptr, type_list);
612 }
613 ;
614
615 rcurly : '}'
616 { $$ = end_arglist () - 1; }
617 ;
618 exp : lcurly arglist rcurly %prec ARROW
619 { write_exp_elt_opcode (pstate, OP_ARRAY);
620 write_exp_elt_longcst (pstate, (LONGEST) 0);
621 write_exp_elt_longcst (pstate, (LONGEST) $3);
622 write_exp_elt_opcode (pstate, OP_ARRAY); }
623 ;
624
625 exp : lcurly type_exp rcurly exp %prec UNARY
626 { write_exp_elt_opcode (pstate, UNOP_MEMVAL_TYPE); }
627 ;
628
629 exp : '(' type_exp ')' exp %prec UNARY
630 { write_exp_elt_opcode (pstate, UNOP_CAST_TYPE); }
631 ;
632
633 exp : '(' exp1 ')'
634 { }
635 ;
636
637 /* Binary operators in order of decreasing precedence. */
638
639 exp : exp '@' exp
640 { write_exp_elt_opcode (pstate, BINOP_REPEAT); }
641 ;
642
643 exp : exp '*' exp
644 { write_exp_elt_opcode (pstate, BINOP_MUL); }
645 ;
646
647 exp : exp '/' exp
648 { write_exp_elt_opcode (pstate, BINOP_DIV); }
649 ;
650
651 exp : exp '%' exp
652 { write_exp_elt_opcode (pstate, BINOP_REM); }
653 ;
654
655 exp : exp '+' exp
656 { write_exp_elt_opcode (pstate, BINOP_ADD); }
657 ;
658
659 exp : exp '-' exp
660 { write_exp_elt_opcode (pstate, BINOP_SUB); }
661 ;
662
663 exp : exp LSH exp
664 { write_exp_elt_opcode (pstate, BINOP_LSH); }
665 ;
666
667 exp : exp RSH exp
668 { write_exp_elt_opcode (pstate, BINOP_RSH); }
669 ;
670
671 exp : exp EQUAL exp
672 { write_exp_elt_opcode (pstate, BINOP_EQUAL); }
673 ;
674
675 exp : exp NOTEQUAL exp
676 { write_exp_elt_opcode (pstate, BINOP_NOTEQUAL); }
677 ;
678
679 exp : exp LEQ exp
680 { write_exp_elt_opcode (pstate, BINOP_LEQ); }
681 ;
682
683 exp : exp GEQ exp
684 { write_exp_elt_opcode (pstate, BINOP_GEQ); }
685 ;
686
687 exp : exp '<' exp
688 { write_exp_elt_opcode (pstate, BINOP_LESS); }
689 ;
690
691 exp : exp '>' exp
692 { write_exp_elt_opcode (pstate, BINOP_GTR); }
693 ;
694
695 exp : exp '&' exp
696 { write_exp_elt_opcode (pstate, BINOP_BITWISE_AND); }
697 ;
698
699 exp : exp '^' exp
700 { write_exp_elt_opcode (pstate, BINOP_BITWISE_XOR); }
701 ;
702
703 exp : exp '|' exp
704 { write_exp_elt_opcode (pstate, BINOP_BITWISE_IOR); }
705 ;
706
707 exp : exp ANDAND exp
708 { write_exp_elt_opcode (pstate, BINOP_LOGICAL_AND); }
709 ;
710
711 exp : exp OROR exp
712 { write_exp_elt_opcode (pstate, BINOP_LOGICAL_OR); }
713 ;
714
715 exp : exp '?' exp ':' exp %prec '?'
716 { write_exp_elt_opcode (pstate, TERNOP_COND); }
717 ;
718
719 exp : exp '=' exp
720 { write_exp_elt_opcode (pstate, BINOP_ASSIGN); }
721 ;
722
723 exp : exp ASSIGN_MODIFY exp
724 { write_exp_elt_opcode (pstate, BINOP_ASSIGN_MODIFY);
725 write_exp_elt_opcode (pstate, $2);
726 write_exp_elt_opcode (pstate,
727 BINOP_ASSIGN_MODIFY); }
728 ;
729
730 exp : INT
731 { write_exp_elt_opcode (pstate, OP_LONG);
732 write_exp_elt_type (pstate, $1.type);
733 write_exp_elt_longcst (pstate, (LONGEST) ($1.val));
734 write_exp_elt_opcode (pstate, OP_LONG); }
735 ;
736
737 exp : CHAR
738 {
739 struct stoken_vector vec;
740 vec.len = 1;
741 vec.tokens = &$1;
742 write_exp_string_vector (pstate, $1.type, &vec);
743 }
744 ;
745
746 exp : NAME_OR_INT
747 { YYSTYPE val;
748 parse_number (pstate, $1.stoken.ptr,
749 $1.stoken.length, 0, &val);
750 write_exp_elt_opcode (pstate, OP_LONG);
751 write_exp_elt_type (pstate, val.typed_val_int.type);
752 write_exp_elt_longcst (pstate,
753 (LONGEST) val.typed_val_int.val);
754 write_exp_elt_opcode (pstate, OP_LONG);
755 }
756 ;
757
758
759 exp : FLOAT
760 { write_exp_elt_opcode (pstate, OP_DOUBLE);
761 write_exp_elt_type (pstate, $1.type);
762 write_exp_elt_dblcst (pstate, $1.dval);
763 write_exp_elt_opcode (pstate, OP_DOUBLE); }
764 ;
765
766 exp : DECFLOAT
767 { write_exp_elt_opcode (pstate, OP_DECFLOAT);
768 write_exp_elt_type (pstate, $1.type);
769 write_exp_elt_decfloatcst (pstate, $1.val);
770 write_exp_elt_opcode (pstate, OP_DECFLOAT); }
771 ;
772
773 exp : variable
774 ;
775
776 exp : VARIABLE
777 {
778 write_dollar_variable (pstate, $1);
779 }
780 ;
781
782 exp : SELECTOR '(' name ')'
783 {
784 write_exp_elt_opcode (pstate, OP_OBJC_SELECTOR);
785 write_exp_string (pstate, $3);
786 write_exp_elt_opcode (pstate, OP_OBJC_SELECTOR); }
787 ;
788
789 exp : SIZEOF '(' type ')' %prec UNARY
790 { struct type *type = $3;
791 write_exp_elt_opcode (pstate, OP_LONG);
792 write_exp_elt_type (pstate, lookup_signed_typename
793 (parse_language (pstate),
794 parse_gdbarch (pstate),
795 "int"));
796 type = check_typedef (type);
797
798 /* $5.3.3/2 of the C++ Standard (n3290 draft)
799 says of sizeof: "When applied to a reference
800 or a reference type, the result is the size of
801 the referenced type." */
802 if (TYPE_CODE (type) == TYPE_CODE_REF)
803 type = check_typedef (TYPE_TARGET_TYPE (type));
804 write_exp_elt_longcst (pstate,
805 (LONGEST) TYPE_LENGTH (type));
806 write_exp_elt_opcode (pstate, OP_LONG); }
807 ;
808
809 exp : REINTERPRET_CAST '<' type_exp '>' '(' exp ')' %prec UNARY
810 { write_exp_elt_opcode (pstate,
811 UNOP_REINTERPRET_CAST); }
812 ;
813
814 exp : STATIC_CAST '<' type_exp '>' '(' exp ')' %prec UNARY
815 { write_exp_elt_opcode (pstate, UNOP_CAST_TYPE); }
816 ;
817
818 exp : DYNAMIC_CAST '<' type_exp '>' '(' exp ')' %prec UNARY
819 { write_exp_elt_opcode (pstate, UNOP_DYNAMIC_CAST); }
820 ;
821
822 exp : CONST_CAST '<' type_exp '>' '(' exp ')' %prec UNARY
823 { /* We could do more error checking here, but
824 it doesn't seem worthwhile. */
825 write_exp_elt_opcode (pstate, UNOP_CAST_TYPE); }
826 ;
827
828 string_exp:
829 STRING
830 {
831 /* We copy the string here, and not in the
832 lexer, to guarantee that we do not leak a
833 string. Note that we follow the
834 NUL-termination convention of the
835 lexer. */
836 struct typed_stoken *vec = XNEW (struct typed_stoken);
837 $$.len = 1;
838 $$.tokens = vec;
839
840 vec->type = $1.type;
841 vec->length = $1.length;
842 vec->ptr = (char *) malloc ($1.length + 1);
843 memcpy (vec->ptr, $1.ptr, $1.length + 1);
844 }
845
846 | string_exp STRING
847 {
848 /* Note that we NUL-terminate here, but just
849 for convenience. */
850 char *p;
851 ++$$.len;
852 $$.tokens = XRESIZEVEC (struct typed_stoken,
853 $$.tokens, $$.len);
854
855 p = (char *) malloc ($2.length + 1);
856 memcpy (p, $2.ptr, $2.length + 1);
857
858 $$.tokens[$$.len - 1].type = $2.type;
859 $$.tokens[$$.len - 1].length = $2.length;
860 $$.tokens[$$.len - 1].ptr = p;
861 }
862 ;
863
864 exp : string_exp
865 {
866 int i;
867 c_string_type type = C_STRING;
868
869 for (i = 0; i < $1.len; ++i)
870 {
871 switch ($1.tokens[i].type)
872 {
873 case C_STRING:
874 break;
875 case C_WIDE_STRING:
876 case C_STRING_16:
877 case C_STRING_32:
878 if (type != C_STRING
879 && type != $1.tokens[i].type)
880 error (_("Undefined string concatenation."));
881 type = (enum c_string_type_values) $1.tokens[i].type;
882 break;
883 default:
884 /* internal error */
885 internal_error (__FILE__, __LINE__,
886 "unrecognized type in string concatenation");
887 }
888 }
889
890 write_exp_string_vector (pstate, type, &$1);
891 for (i = 0; i < $1.len; ++i)
892 free ($1.tokens[i].ptr);
893 free ($1.tokens);
894 }
895 ;
896
897 exp : NSSTRING /* ObjC NextStep NSString constant
898 * of the form '@' '"' string '"'.
899 */
900 { write_exp_elt_opcode (pstate, OP_OBJC_NSSTRING);
901 write_exp_string (pstate, $1);
902 write_exp_elt_opcode (pstate, OP_OBJC_NSSTRING); }
903 ;
904
905 /* C++. */
906 exp : TRUEKEYWORD
907 { write_exp_elt_opcode (pstate, OP_LONG);
908 write_exp_elt_type (pstate,
909 parse_type (pstate)->builtin_bool);
910 write_exp_elt_longcst (pstate, (LONGEST) 1);
911 write_exp_elt_opcode (pstate, OP_LONG); }
912 ;
913
914 exp : FALSEKEYWORD
915 { write_exp_elt_opcode (pstate, OP_LONG);
916 write_exp_elt_type (pstate,
917 parse_type (pstate)->builtin_bool);
918 write_exp_elt_longcst (pstate, (LONGEST) 0);
919 write_exp_elt_opcode (pstate, OP_LONG); }
920 ;
921
922 /* end of C++. */
923
924 block : BLOCKNAME
925 {
926 if ($1.sym.symbol)
927 $$ = SYMBOL_BLOCK_VALUE ($1.sym.symbol);
928 else
929 error (_("No file or function \"%s\"."),
930 copy_name ($1.stoken));
931 }
932 | FILENAME
933 {
934 $$ = $1;
935 }
936 ;
937
938 block : block COLONCOLON name
939 { struct symbol *tem
940 = lookup_symbol (copy_name ($3), $1,
941 VAR_DOMAIN, NULL).symbol;
942
943 if (!tem || SYMBOL_CLASS (tem) != LOC_BLOCK)
944 error (_("No function \"%s\" in specified context."),
945 copy_name ($3));
946 $$ = SYMBOL_BLOCK_VALUE (tem); }
947 ;
948
949 variable: name_not_typename ENTRY
950 { struct symbol *sym = $1.sym.symbol;
951
952 if (sym == NULL || !SYMBOL_IS_ARGUMENT (sym)
953 || !symbol_read_needs_frame (sym))
954 error (_("@entry can be used only for function "
955 "parameters, not for \"%s\""),
956 copy_name ($1.stoken));
957
958 write_exp_elt_opcode (pstate, OP_VAR_ENTRY_VALUE);
959 write_exp_elt_sym (pstate, sym);
960 write_exp_elt_opcode (pstate, OP_VAR_ENTRY_VALUE);
961 }
962 ;
963
964 variable: block COLONCOLON name
965 { struct block_symbol sym
966 = lookup_symbol (copy_name ($3), $1,
967 VAR_DOMAIN, NULL);
968
969 if (sym.symbol == 0)
970 error (_("No symbol \"%s\" in specified context."),
971 copy_name ($3));
972 if (symbol_read_needs_frame (sym.symbol))
973 {
974 if (innermost_block == 0
975 || contained_in (sym.block,
976 innermost_block))
977 innermost_block = sym.block;
978 }
979
980 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
981 write_exp_elt_block (pstate, sym.block);
982 write_exp_elt_sym (pstate, sym.symbol);
983 write_exp_elt_opcode (pstate, OP_VAR_VALUE); }
984 ;
985
986 qualified_name: TYPENAME COLONCOLON name
987 {
988 struct type *type = $1.type;
989 type = check_typedef (type);
990 if (!type_aggregate_p (type))
991 error (_("`%s' is not defined as an aggregate type."),
992 TYPE_SAFE_NAME (type));
993
994 write_exp_elt_opcode (pstate, OP_SCOPE);
995 write_exp_elt_type (pstate, type);
996 write_exp_string (pstate, $3);
997 write_exp_elt_opcode (pstate, OP_SCOPE);
998 }
999 | TYPENAME COLONCOLON '~' name
1000 {
1001 struct type *type = $1.type;
1002 struct stoken tmp_token;
1003 char *buf;
1004
1005 type = check_typedef (type);
1006 if (!type_aggregate_p (type))
1007 error (_("`%s' is not defined as an aggregate type."),
1008 TYPE_SAFE_NAME (type));
1009 buf = (char *) alloca ($4.length + 2);
1010 tmp_token.ptr = buf;
1011 tmp_token.length = $4.length + 1;
1012 buf[0] = '~';
1013 memcpy (buf+1, $4.ptr, $4.length);
1014 buf[tmp_token.length] = 0;
1015
1016 /* Check for valid destructor name. */
1017 destructor_name_p (tmp_token.ptr, $1.type);
1018 write_exp_elt_opcode (pstate, OP_SCOPE);
1019 write_exp_elt_type (pstate, type);
1020 write_exp_string (pstate, tmp_token);
1021 write_exp_elt_opcode (pstate, OP_SCOPE);
1022 }
1023 | TYPENAME COLONCOLON name COLONCOLON name
1024 {
1025 char *copy = copy_name ($3);
1026 error (_("No type \"%s\" within class "
1027 "or namespace \"%s\"."),
1028 copy, TYPE_SAFE_NAME ($1.type));
1029 }
1030 ;
1031
1032 variable: qualified_name
1033 | COLONCOLON name_not_typename
1034 {
1035 char *name = copy_name ($2.stoken);
1036 struct symbol *sym;
1037 struct bound_minimal_symbol msymbol;
1038
1039 sym
1040 = lookup_symbol (name, (const struct block *) NULL,
1041 VAR_DOMAIN, NULL).symbol;
1042 if (sym)
1043 {
1044 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1045 write_exp_elt_block (pstate, NULL);
1046 write_exp_elt_sym (pstate, sym);
1047 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1048 break;
1049 }
1050
1051 msymbol = lookup_bound_minimal_symbol (name);
1052 if (msymbol.minsym != NULL)
1053 write_exp_msymbol (pstate, msymbol);
1054 else if (!have_full_symbols () && !have_partial_symbols ())
1055 error (_("No symbol table is loaded. Use the \"file\" command."));
1056 else
1057 error (_("No symbol \"%s\" in current context."), name);
1058 }
1059 ;
1060
1061 variable: name_not_typename
1062 { struct block_symbol sym = $1.sym;
1063
1064 if (sym.symbol)
1065 {
1066 if (symbol_read_needs_frame (sym.symbol))
1067 {
1068 if (innermost_block == 0
1069 || contained_in (sym.block,
1070 innermost_block))
1071 innermost_block = sym.block;
1072 }
1073
1074 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1075 write_exp_elt_block (pstate, sym.block);
1076 write_exp_elt_sym (pstate, sym.symbol);
1077 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1078 }
1079 else if ($1.is_a_field_of_this)
1080 {
1081 /* C++: it hangs off of `this'. Must
1082 not inadvertently convert from a method call
1083 to data ref. */
1084 if (innermost_block == 0
1085 || contained_in (sym.block,
1086 innermost_block))
1087 innermost_block = sym.block;
1088 write_exp_elt_opcode (pstate, OP_THIS);
1089 write_exp_elt_opcode (pstate, OP_THIS);
1090 write_exp_elt_opcode (pstate, STRUCTOP_PTR);
1091 write_exp_string (pstate, $1.stoken);
1092 write_exp_elt_opcode (pstate, STRUCTOP_PTR);
1093 }
1094 else
1095 {
1096 struct bound_minimal_symbol msymbol;
1097 char *arg = copy_name ($1.stoken);
1098
1099 msymbol =
1100 lookup_bound_minimal_symbol (arg);
1101 if (msymbol.minsym != NULL)
1102 write_exp_msymbol (pstate, msymbol);
1103 else if (!have_full_symbols () && !have_partial_symbols ())
1104 error (_("No symbol table is loaded. Use the \"file\" command."));
1105 else
1106 error (_("No symbol \"%s\" in current context."),
1107 copy_name ($1.stoken));
1108 }
1109 }
1110 ;
1111
1112 space_identifier : '@' NAME
1113 { insert_type_address_space (pstate, copy_name ($2.stoken)); }
1114 ;
1115
1116 const_or_volatile: const_or_volatile_noopt
1117 |
1118 ;
1119
1120 cv_with_space_id : const_or_volatile space_identifier const_or_volatile
1121 ;
1122
1123 const_or_volatile_or_space_identifier_noopt: cv_with_space_id
1124 | const_or_volatile_noopt
1125 ;
1126
1127 const_or_volatile_or_space_identifier:
1128 const_or_volatile_or_space_identifier_noopt
1129 |
1130 ;
1131
1132 ptr_operator:
1133 ptr_operator '*'
1134 { insert_type (tp_pointer); }
1135 const_or_volatile_or_space_identifier
1136 | '*'
1137 { insert_type (tp_pointer); }
1138 const_or_volatile_or_space_identifier
1139 | '&'
1140 { insert_type (tp_reference); }
1141 | '&' ptr_operator
1142 { insert_type (tp_reference); }
1143 ;
1144
1145 ptr_operator_ts: ptr_operator
1146 {
1147 $$ = get_type_stack ();
1148 /* This cleanup is eventually run by
1149 c_parse. */
1150 make_cleanup (type_stack_cleanup, $$);
1151 }
1152 ;
1153
1154 abs_decl: ptr_operator_ts direct_abs_decl
1155 { $$ = append_type_stack ($2, $1); }
1156 | ptr_operator_ts
1157 | direct_abs_decl
1158 ;
1159
1160 direct_abs_decl: '(' abs_decl ')'
1161 { $$ = $2; }
1162 | direct_abs_decl array_mod
1163 {
1164 push_type_stack ($1);
1165 push_type_int ($2);
1166 push_type (tp_array);
1167 $$ = get_type_stack ();
1168 }
1169 | array_mod
1170 {
1171 push_type_int ($1);
1172 push_type (tp_array);
1173 $$ = get_type_stack ();
1174 }
1175
1176 | direct_abs_decl func_mod
1177 {
1178 push_type_stack ($1);
1179 push_typelist ($2);
1180 $$ = get_type_stack ();
1181 }
1182 | func_mod
1183 {
1184 push_typelist ($1);
1185 $$ = get_type_stack ();
1186 }
1187 ;
1188
1189 array_mod: '[' ']'
1190 { $$ = -1; }
1191 | OBJC_LBRAC ']'
1192 { $$ = -1; }
1193 | '[' INT ']'
1194 { $$ = $2.val; }
1195 | OBJC_LBRAC INT ']'
1196 { $$ = $2.val; }
1197 ;
1198
1199 func_mod: '(' ')'
1200 { $$ = NULL; }
1201 | '(' parameter_typelist ')'
1202 { $$ = $2; }
1203 ;
1204
1205 /* We used to try to recognize pointer to member types here, but
1206 that didn't work (shift/reduce conflicts meant that these rules never
1207 got executed). The problem is that
1208 int (foo::bar::baz::bizzle)
1209 is a function type but
1210 int (foo::bar::baz::bizzle::*)
1211 is a pointer to member type. Stroustrup loses again! */
1212
1213 type : ptype
1214 ;
1215
1216 typebase /* Implements (approximately): (type-qualifier)* type-specifier */
1217 : TYPENAME
1218 { $$ = $1.type; }
1219 | INT_KEYWORD
1220 { $$ = lookup_signed_typename (parse_language (pstate),
1221 parse_gdbarch (pstate),
1222 "int"); }
1223 | LONG
1224 { $$ = lookup_signed_typename (parse_language (pstate),
1225 parse_gdbarch (pstate),
1226 "long"); }
1227 | SHORT
1228 { $$ = lookup_signed_typename (parse_language (pstate),
1229 parse_gdbarch (pstate),
1230 "short"); }
1231 | LONG INT_KEYWORD
1232 { $$ = lookup_signed_typename (parse_language (pstate),
1233 parse_gdbarch (pstate),
1234 "long"); }
1235 | LONG SIGNED_KEYWORD INT_KEYWORD
1236 { $$ = lookup_signed_typename (parse_language (pstate),
1237 parse_gdbarch (pstate),
1238 "long"); }
1239 | LONG SIGNED_KEYWORD
1240 { $$ = lookup_signed_typename (parse_language (pstate),
1241 parse_gdbarch (pstate),
1242 "long"); }
1243 | SIGNED_KEYWORD LONG INT_KEYWORD
1244 { $$ = lookup_signed_typename (parse_language (pstate),
1245 parse_gdbarch (pstate),
1246 "long"); }
1247 | UNSIGNED LONG INT_KEYWORD
1248 { $$ = lookup_unsigned_typename (parse_language (pstate),
1249 parse_gdbarch (pstate),
1250 "long"); }
1251 | LONG UNSIGNED INT_KEYWORD
1252 { $$ = lookup_unsigned_typename (parse_language (pstate),
1253 parse_gdbarch (pstate),
1254 "long"); }
1255 | LONG UNSIGNED
1256 { $$ = lookup_unsigned_typename (parse_language (pstate),
1257 parse_gdbarch (pstate),
1258 "long"); }
1259 | LONG LONG
1260 { $$ = lookup_signed_typename (parse_language (pstate),
1261 parse_gdbarch (pstate),
1262 "long long"); }
1263 | LONG LONG INT_KEYWORD
1264 { $$ = lookup_signed_typename (parse_language (pstate),
1265 parse_gdbarch (pstate),
1266 "long long"); }
1267 | LONG LONG SIGNED_KEYWORD INT_KEYWORD
1268 { $$ = lookup_signed_typename (parse_language (pstate),
1269 parse_gdbarch (pstate),
1270 "long long"); }
1271 | LONG LONG SIGNED_KEYWORD
1272 { $$ = lookup_signed_typename (parse_language (pstate),
1273 parse_gdbarch (pstate),
1274 "long long"); }
1275 | SIGNED_KEYWORD LONG LONG
1276 { $$ = lookup_signed_typename (parse_language (pstate),
1277 parse_gdbarch (pstate),
1278 "long long"); }
1279 | SIGNED_KEYWORD LONG LONG INT_KEYWORD
1280 { $$ = lookup_signed_typename (parse_language (pstate),
1281 parse_gdbarch (pstate),
1282 "long long"); }
1283 | UNSIGNED LONG LONG
1284 { $$ = lookup_unsigned_typename (parse_language (pstate),
1285 parse_gdbarch (pstate),
1286 "long long"); }
1287 | UNSIGNED LONG LONG INT_KEYWORD
1288 { $$ = lookup_unsigned_typename (parse_language (pstate),
1289 parse_gdbarch (pstate),
1290 "long long"); }
1291 | LONG LONG UNSIGNED
1292 { $$ = lookup_unsigned_typename (parse_language (pstate),
1293 parse_gdbarch (pstate),
1294 "long long"); }
1295 | LONG LONG UNSIGNED INT_KEYWORD
1296 { $$ = lookup_unsigned_typename (parse_language (pstate),
1297 parse_gdbarch (pstate),
1298 "long long"); }
1299 | SHORT INT_KEYWORD
1300 { $$ = lookup_signed_typename (parse_language (pstate),
1301 parse_gdbarch (pstate),
1302 "short"); }
1303 | SHORT SIGNED_KEYWORD INT_KEYWORD
1304 { $$ = lookup_signed_typename (parse_language (pstate),
1305 parse_gdbarch (pstate),
1306 "short"); }
1307 | SHORT SIGNED_KEYWORD
1308 { $$ = lookup_signed_typename (parse_language (pstate),
1309 parse_gdbarch (pstate),
1310 "short"); }
1311 | UNSIGNED SHORT INT_KEYWORD
1312 { $$ = lookup_unsigned_typename (parse_language (pstate),
1313 parse_gdbarch (pstate),
1314 "short"); }
1315 | SHORT UNSIGNED
1316 { $$ = lookup_unsigned_typename (parse_language (pstate),
1317 parse_gdbarch (pstate),
1318 "short"); }
1319 | SHORT UNSIGNED INT_KEYWORD
1320 { $$ = lookup_unsigned_typename (parse_language (pstate),
1321 parse_gdbarch (pstate),
1322 "short"); }
1323 | DOUBLE_KEYWORD
1324 { $$ = lookup_typename (parse_language (pstate),
1325 parse_gdbarch (pstate),
1326 "double",
1327 (struct block *) NULL,
1328 0); }
1329 | LONG DOUBLE_KEYWORD
1330 { $$ = lookup_typename (parse_language (pstate),
1331 parse_gdbarch (pstate),
1332 "long double",
1333 (struct block *) NULL,
1334 0); }
1335 | STRUCT name
1336 { $$ = lookup_struct (copy_name ($2),
1337 expression_context_block); }
1338 | STRUCT COMPLETE
1339 {
1340 mark_completion_tag (TYPE_CODE_STRUCT, "", 0);
1341 $$ = NULL;
1342 }
1343 | STRUCT name COMPLETE
1344 {
1345 mark_completion_tag (TYPE_CODE_STRUCT, $2.ptr,
1346 $2.length);
1347 $$ = NULL;
1348 }
1349 | CLASS name
1350 { $$ = lookup_struct (copy_name ($2),
1351 expression_context_block); }
1352 | CLASS COMPLETE
1353 {
1354 mark_completion_tag (TYPE_CODE_STRUCT, "", 0);
1355 $$ = NULL;
1356 }
1357 | CLASS name COMPLETE
1358 {
1359 mark_completion_tag (TYPE_CODE_STRUCT, $2.ptr,
1360 $2.length);
1361 $$ = NULL;
1362 }
1363 | UNION name
1364 { $$ = lookup_union (copy_name ($2),
1365 expression_context_block); }
1366 | UNION COMPLETE
1367 {
1368 mark_completion_tag (TYPE_CODE_UNION, "", 0);
1369 $$ = NULL;
1370 }
1371 | UNION name COMPLETE
1372 {
1373 mark_completion_tag (TYPE_CODE_UNION, $2.ptr,
1374 $2.length);
1375 $$ = NULL;
1376 }
1377 | ENUM name
1378 { $$ = lookup_enum (copy_name ($2),
1379 expression_context_block); }
1380 | ENUM COMPLETE
1381 {
1382 mark_completion_tag (TYPE_CODE_ENUM, "", 0);
1383 $$ = NULL;
1384 }
1385 | ENUM name COMPLETE
1386 {
1387 mark_completion_tag (TYPE_CODE_ENUM, $2.ptr,
1388 $2.length);
1389 $$ = NULL;
1390 }
1391 | UNSIGNED type_name
1392 { $$ = lookup_unsigned_typename (parse_language (pstate),
1393 parse_gdbarch (pstate),
1394 TYPE_NAME($2.type)); }
1395 | UNSIGNED
1396 { $$ = lookup_unsigned_typename (parse_language (pstate),
1397 parse_gdbarch (pstate),
1398 "int"); }
1399 | SIGNED_KEYWORD type_name
1400 { $$ = lookup_signed_typename (parse_language (pstate),
1401 parse_gdbarch (pstate),
1402 TYPE_NAME($2.type)); }
1403 | SIGNED_KEYWORD
1404 { $$ = lookup_signed_typename (parse_language (pstate),
1405 parse_gdbarch (pstate),
1406 "int"); }
1407 /* It appears that this rule for templates is never
1408 reduced; template recognition happens by lookahead
1409 in the token processing code in yylex. */
1410 | TEMPLATE name '<' type '>'
1411 { $$ = lookup_template_type(copy_name($2), $4,
1412 expression_context_block);
1413 }
1414 | const_or_volatile_or_space_identifier_noopt typebase
1415 { $$ = follow_types ($2); }
1416 | typebase const_or_volatile_or_space_identifier_noopt
1417 { $$ = follow_types ($1); }
1418 ;
1419
1420 type_name: TYPENAME
1421 | INT_KEYWORD
1422 {
1423 $$.stoken.ptr = "int";
1424 $$.stoken.length = 3;
1425 $$.type = lookup_signed_typename (parse_language (pstate),
1426 parse_gdbarch (pstate),
1427 "int");
1428 }
1429 | LONG
1430 {
1431 $$.stoken.ptr = "long";
1432 $$.stoken.length = 4;
1433 $$.type = lookup_signed_typename (parse_language (pstate),
1434 parse_gdbarch (pstate),
1435 "long");
1436 }
1437 | SHORT
1438 {
1439 $$.stoken.ptr = "short";
1440 $$.stoken.length = 5;
1441 $$.type = lookup_signed_typename (parse_language (pstate),
1442 parse_gdbarch (pstate),
1443 "short");
1444 }
1445 ;
1446
1447 parameter_typelist:
1448 nonempty_typelist
1449 { check_parameter_typelist ($1); }
1450 | nonempty_typelist ',' DOTDOTDOT
1451 {
1452 VEC_safe_push (type_ptr, $1, NULL);
1453 check_parameter_typelist ($1);
1454 $$ = $1;
1455 }
1456 ;
1457
1458 nonempty_typelist
1459 : type
1460 {
1461 VEC (type_ptr) *typelist = NULL;
1462 VEC_safe_push (type_ptr, typelist, $1);
1463 $$ = typelist;
1464 }
1465 | nonempty_typelist ',' type
1466 {
1467 VEC_safe_push (type_ptr, $1, $3);
1468 $$ = $1;
1469 }
1470 ;
1471
1472 ptype : typebase
1473 | ptype abs_decl
1474 {
1475 push_type_stack ($2);
1476 $$ = follow_types ($1);
1477 }
1478 ;
1479
1480 conversion_type_id: typebase conversion_declarator
1481 { $$ = follow_types ($1); }
1482 ;
1483
1484 conversion_declarator: /* Nothing. */
1485 | ptr_operator conversion_declarator
1486 ;
1487
1488 const_and_volatile: CONST_KEYWORD VOLATILE_KEYWORD
1489 | VOLATILE_KEYWORD CONST_KEYWORD
1490 ;
1491
1492 const_or_volatile_noopt: const_and_volatile
1493 { insert_type (tp_const);
1494 insert_type (tp_volatile);
1495 }
1496 | CONST_KEYWORD
1497 { insert_type (tp_const); }
1498 | VOLATILE_KEYWORD
1499 { insert_type (tp_volatile); }
1500 ;
1501
1502 oper: OPERATOR NEW
1503 { $$ = operator_stoken (" new"); }
1504 | OPERATOR DELETE
1505 { $$ = operator_stoken (" delete"); }
1506 | OPERATOR NEW '[' ']'
1507 { $$ = operator_stoken (" new[]"); }
1508 | OPERATOR DELETE '[' ']'
1509 { $$ = operator_stoken (" delete[]"); }
1510 | OPERATOR NEW OBJC_LBRAC ']'
1511 { $$ = operator_stoken (" new[]"); }
1512 | OPERATOR DELETE OBJC_LBRAC ']'
1513 { $$ = operator_stoken (" delete[]"); }
1514 | OPERATOR '+'
1515 { $$ = operator_stoken ("+"); }
1516 | OPERATOR '-'
1517 { $$ = operator_stoken ("-"); }
1518 | OPERATOR '*'
1519 { $$ = operator_stoken ("*"); }
1520 | OPERATOR '/'
1521 { $$ = operator_stoken ("/"); }
1522 | OPERATOR '%'
1523 { $$ = operator_stoken ("%"); }
1524 | OPERATOR '^'
1525 { $$ = operator_stoken ("^"); }
1526 | OPERATOR '&'
1527 { $$ = operator_stoken ("&"); }
1528 | OPERATOR '|'
1529 { $$ = operator_stoken ("|"); }
1530 | OPERATOR '~'
1531 { $$ = operator_stoken ("~"); }
1532 | OPERATOR '!'
1533 { $$ = operator_stoken ("!"); }
1534 | OPERATOR '='
1535 { $$ = operator_stoken ("="); }
1536 | OPERATOR '<'
1537 { $$ = operator_stoken ("<"); }
1538 | OPERATOR '>'
1539 { $$ = operator_stoken (">"); }
1540 | OPERATOR ASSIGN_MODIFY
1541 { const char *op = "unknown";
1542 switch ($2)
1543 {
1544 case BINOP_RSH:
1545 op = ">>=";
1546 break;
1547 case BINOP_LSH:
1548 op = "<<=";
1549 break;
1550 case BINOP_ADD:
1551 op = "+=";
1552 break;
1553 case BINOP_SUB:
1554 op = "-=";
1555 break;
1556 case BINOP_MUL:
1557 op = "*=";
1558 break;
1559 case BINOP_DIV:
1560 op = "/=";
1561 break;
1562 case BINOP_REM:
1563 op = "%=";
1564 break;
1565 case BINOP_BITWISE_IOR:
1566 op = "|=";
1567 break;
1568 case BINOP_BITWISE_AND:
1569 op = "&=";
1570 break;
1571 case BINOP_BITWISE_XOR:
1572 op = "^=";
1573 break;
1574 default:
1575 break;
1576 }
1577
1578 $$ = operator_stoken (op);
1579 }
1580 | OPERATOR LSH
1581 { $$ = operator_stoken ("<<"); }
1582 | OPERATOR RSH
1583 { $$ = operator_stoken (">>"); }
1584 | OPERATOR EQUAL
1585 { $$ = operator_stoken ("=="); }
1586 | OPERATOR NOTEQUAL
1587 { $$ = operator_stoken ("!="); }
1588 | OPERATOR LEQ
1589 { $$ = operator_stoken ("<="); }
1590 | OPERATOR GEQ
1591 { $$ = operator_stoken (">="); }
1592 | OPERATOR ANDAND
1593 { $$ = operator_stoken ("&&"); }
1594 | OPERATOR OROR
1595 { $$ = operator_stoken ("||"); }
1596 | OPERATOR INCREMENT
1597 { $$ = operator_stoken ("++"); }
1598 | OPERATOR DECREMENT
1599 { $$ = operator_stoken ("--"); }
1600 | OPERATOR ','
1601 { $$ = operator_stoken (","); }
1602 | OPERATOR ARROW_STAR
1603 { $$ = operator_stoken ("->*"); }
1604 | OPERATOR ARROW
1605 { $$ = operator_stoken ("->"); }
1606 | OPERATOR '(' ')'
1607 { $$ = operator_stoken ("()"); }
1608 | OPERATOR '[' ']'
1609 { $$ = operator_stoken ("[]"); }
1610 | OPERATOR OBJC_LBRAC ']'
1611 { $$ = operator_stoken ("[]"); }
1612 | OPERATOR conversion_type_id
1613 { char *name;
1614 long length;
1615 struct ui_file *buf = mem_fileopen ();
1616
1617 c_print_type ($2, NULL, buf, -1, 0,
1618 &type_print_raw_options);
1619 name = ui_file_xstrdup (buf, &length);
1620 ui_file_delete (buf);
1621 $$ = operator_stoken (name);
1622 free (name);
1623 }
1624 ;
1625
1626
1627
1628 name : NAME { $$ = $1.stoken; }
1629 | BLOCKNAME { $$ = $1.stoken; }
1630 | TYPENAME { $$ = $1.stoken; }
1631 | NAME_OR_INT { $$ = $1.stoken; }
1632 | UNKNOWN_CPP_NAME { $$ = $1.stoken; }
1633 | oper { $$ = $1; }
1634 ;
1635
1636 name_not_typename : NAME
1637 | BLOCKNAME
1638 /* These would be useful if name_not_typename was useful, but it is just
1639 a fake for "variable", so these cause reduce/reduce conflicts because
1640 the parser can't tell whether NAME_OR_INT is a name_not_typename (=variable,
1641 =exp) or just an exp. If name_not_typename was ever used in an lvalue
1642 context where only a name could occur, this might be useful.
1643 | NAME_OR_INT
1644 */
1645 | oper
1646 {
1647 struct field_of_this_result is_a_field_of_this;
1648
1649 $$.stoken = $1;
1650 $$.sym = lookup_symbol ($1.ptr,
1651 expression_context_block,
1652 VAR_DOMAIN,
1653 &is_a_field_of_this);
1654 $$.is_a_field_of_this
1655 = is_a_field_of_this.type != NULL;
1656 }
1657 | UNKNOWN_CPP_NAME
1658 ;
1659
1660 %%
1661
1662 /* Like write_exp_string, but prepends a '~'. */
1663
1664 static void
1665 write_destructor_name (struct parser_state *par_state, struct stoken token)
1666 {
1667 char *copy = (char *) alloca (token.length + 1);
1668
1669 copy[0] = '~';
1670 memcpy (&copy[1], token.ptr, token.length);
1671
1672 token.ptr = copy;
1673 ++token.length;
1674
1675 write_exp_string (par_state, token);
1676 }
1677
1678 /* Returns a stoken of the operator name given by OP (which does not
1679 include the string "operator"). */
1680
1681 static struct stoken
1682 operator_stoken (const char *op)
1683 {
1684 static const char *operator_string = "operator";
1685 struct stoken st = { NULL, 0 };
1686 char *buf;
1687
1688 st.length = strlen (operator_string) + strlen (op);
1689 buf = (char *) malloc (st.length + 1);
1690 strcpy (buf, operator_string);
1691 strcat (buf, op);
1692 st.ptr = buf;
1693
1694 /* The toplevel (c_parse) will free the memory allocated here. */
1695 make_cleanup (free, buf);
1696 return st;
1697 };
1698
1699 /* Return true if the type is aggregate-like. */
1700
1701 static int
1702 type_aggregate_p (struct type *type)
1703 {
1704 return (TYPE_CODE (type) == TYPE_CODE_STRUCT
1705 || TYPE_CODE (type) == TYPE_CODE_UNION
1706 || TYPE_CODE (type) == TYPE_CODE_NAMESPACE
1707 || (TYPE_CODE (type) == TYPE_CODE_ENUM
1708 && TYPE_DECLARED_CLASS (type)));
1709 }
1710
1711 /* Validate a parameter typelist. */
1712
1713 static void
1714 check_parameter_typelist (VEC (type_ptr) *params)
1715 {
1716 struct type *type;
1717 int ix;
1718
1719 for (ix = 0; VEC_iterate (type_ptr, params, ix, type); ++ix)
1720 {
1721 if (type != NULL && TYPE_CODE (check_typedef (type)) == TYPE_CODE_VOID)
1722 {
1723 if (ix == 0)
1724 {
1725 if (VEC_length (type_ptr, params) == 1)
1726 {
1727 /* Ok. */
1728 break;
1729 }
1730 VEC_free (type_ptr, params);
1731 error (_("parameter types following 'void'"));
1732 }
1733 else
1734 {
1735 VEC_free (type_ptr, params);
1736 error (_("'void' invalid as parameter type"));
1737 }
1738 }
1739 }
1740 }
1741
1742 /* Take care of parsing a number (anything that starts with a digit).
1743 Set yylval and return the token type; update lexptr.
1744 LEN is the number of characters in it. */
1745
1746 /*** Needs some error checking for the float case ***/
1747
1748 static int
1749 parse_number (struct parser_state *par_state,
1750 const char *buf, int len, int parsed_float, YYSTYPE *putithere)
1751 {
1752 /* FIXME: Shouldn't these be unsigned? We don't deal with negative values
1753 here, and we do kind of silly things like cast to unsigned. */
1754 LONGEST n = 0;
1755 LONGEST prevn = 0;
1756 ULONGEST un;
1757
1758 int i = 0;
1759 int c;
1760 int base = input_radix;
1761 int unsigned_p = 0;
1762
1763 /* Number of "L" suffixes encountered. */
1764 int long_p = 0;
1765
1766 /* We have found a "L" or "U" suffix. */
1767 int found_suffix = 0;
1768
1769 ULONGEST high_bit;
1770 struct type *signed_type;
1771 struct type *unsigned_type;
1772 char *p;
1773
1774 p = (char *) alloca (len);
1775 memcpy (p, buf, len);
1776
1777 if (parsed_float)
1778 {
1779 /* If it ends at "df", "dd" or "dl", take it as type of decimal floating
1780 point. Return DECFLOAT. */
1781
1782 if (len >= 2 && p[len - 2] == 'd' && p[len - 1] == 'f')
1783 {
1784 p[len - 2] = '\0';
1785 putithere->typed_val_decfloat.type
1786 = parse_type (par_state)->builtin_decfloat;
1787 decimal_from_string (putithere->typed_val_decfloat.val, 4,
1788 gdbarch_byte_order (parse_gdbarch (par_state)),
1789 p);
1790 p[len - 2] = 'd';
1791 return DECFLOAT;
1792 }
1793
1794 if (len >= 2 && p[len - 2] == 'd' && p[len - 1] == 'd')
1795 {
1796 p[len - 2] = '\0';
1797 putithere->typed_val_decfloat.type
1798 = parse_type (par_state)->builtin_decdouble;
1799 decimal_from_string (putithere->typed_val_decfloat.val, 8,
1800 gdbarch_byte_order (parse_gdbarch (par_state)),
1801 p);
1802 p[len - 2] = 'd';
1803 return DECFLOAT;
1804 }
1805
1806 if (len >= 2 && p[len - 2] == 'd' && p[len - 1] == 'l')
1807 {
1808 p[len - 2] = '\0';
1809 putithere->typed_val_decfloat.type
1810 = parse_type (par_state)->builtin_declong;
1811 decimal_from_string (putithere->typed_val_decfloat.val, 16,
1812 gdbarch_byte_order (parse_gdbarch (par_state)),
1813 p);
1814 p[len - 2] = 'd';
1815 return DECFLOAT;
1816 }
1817
1818 if (! parse_c_float (parse_gdbarch (par_state), p, len,
1819 &putithere->typed_val_float.dval,
1820 &putithere->typed_val_float.type))
1821 return ERROR;
1822 return FLOAT;
1823 }
1824
1825 /* Handle base-switching prefixes 0x, 0t, 0d, 0 */
1826 if (p[0] == '0' && len > 1)
1827 switch (p[1])
1828 {
1829 case 'x':
1830 case 'X':
1831 if (len >= 3)
1832 {
1833 p += 2;
1834 base = 16;
1835 len -= 2;
1836 }
1837 break;
1838
1839 case 'b':
1840 case 'B':
1841 if (len >= 3)
1842 {
1843 p += 2;
1844 base = 2;
1845 len -= 2;
1846 }
1847 break;
1848
1849 case 't':
1850 case 'T':
1851 case 'd':
1852 case 'D':
1853 if (len >= 3)
1854 {
1855 p += 2;
1856 base = 10;
1857 len -= 2;
1858 }
1859 break;
1860
1861 default:
1862 base = 8;
1863 break;
1864 }
1865
1866 while (len-- > 0)
1867 {
1868 c = *p++;
1869 if (c >= 'A' && c <= 'Z')
1870 c += 'a' - 'A';
1871 if (c != 'l' && c != 'u')
1872 n *= base;
1873 if (c >= '0' && c <= '9')
1874 {
1875 if (found_suffix)
1876 return ERROR;
1877 n += i = c - '0';
1878 }
1879 else
1880 {
1881 if (base > 10 && c >= 'a' && c <= 'f')
1882 {
1883 if (found_suffix)
1884 return ERROR;
1885 n += i = c - 'a' + 10;
1886 }
1887 else if (c == 'l')
1888 {
1889 ++long_p;
1890 found_suffix = 1;
1891 }
1892 else if (c == 'u')
1893 {
1894 unsigned_p = 1;
1895 found_suffix = 1;
1896 }
1897 else
1898 return ERROR; /* Char not a digit */
1899 }
1900 if (i >= base)
1901 return ERROR; /* Invalid digit in this base */
1902
1903 /* Portably test for overflow (only works for nonzero values, so make
1904 a second check for zero). FIXME: Can't we just make n and prevn
1905 unsigned and avoid this? */
1906 if (c != 'l' && c != 'u' && (prevn >= n) && n != 0)
1907 unsigned_p = 1; /* Try something unsigned */
1908
1909 /* Portably test for unsigned overflow.
1910 FIXME: This check is wrong; for example it doesn't find overflow
1911 on 0x123456789 when LONGEST is 32 bits. */
1912 if (c != 'l' && c != 'u' && n != 0)
1913 {
1914 if ((unsigned_p && (ULONGEST) prevn >= (ULONGEST) n))
1915 error (_("Numeric constant too large."));
1916 }
1917 prevn = n;
1918 }
1919
1920 /* An integer constant is an int, a long, or a long long. An L
1921 suffix forces it to be long; an LL suffix forces it to be long
1922 long. If not forced to a larger size, it gets the first type of
1923 the above that it fits in. To figure out whether it fits, we
1924 shift it right and see whether anything remains. Note that we
1925 can't shift sizeof (LONGEST) * HOST_CHAR_BIT bits or more in one
1926 operation, because many compilers will warn about such a shift
1927 (which always produces a zero result). Sometimes gdbarch_int_bit
1928 or gdbarch_long_bit will be that big, sometimes not. To deal with
1929 the case where it is we just always shift the value more than
1930 once, with fewer bits each time. */
1931
1932 un = (ULONGEST)n >> 2;
1933 if (long_p == 0
1934 && (un >> (gdbarch_int_bit (parse_gdbarch (par_state)) - 2)) == 0)
1935 {
1936 high_bit
1937 = ((ULONGEST)1) << (gdbarch_int_bit (parse_gdbarch (par_state)) - 1);
1938
1939 /* A large decimal (not hex or octal) constant (between INT_MAX
1940 and UINT_MAX) is a long or unsigned long, according to ANSI,
1941 never an unsigned int, but this code treats it as unsigned
1942 int. This probably should be fixed. GCC gives a warning on
1943 such constants. */
1944
1945 unsigned_type = parse_type (par_state)->builtin_unsigned_int;
1946 signed_type = parse_type (par_state)->builtin_int;
1947 }
1948 else if (long_p <= 1
1949 && (un >> (gdbarch_long_bit (parse_gdbarch (par_state)) - 2)) == 0)
1950 {
1951 high_bit
1952 = ((ULONGEST)1) << (gdbarch_long_bit (parse_gdbarch (par_state)) - 1);
1953 unsigned_type = parse_type (par_state)->builtin_unsigned_long;
1954 signed_type = parse_type (par_state)->builtin_long;
1955 }
1956 else
1957 {
1958 int shift;
1959 if (sizeof (ULONGEST) * HOST_CHAR_BIT
1960 < gdbarch_long_long_bit (parse_gdbarch (par_state)))
1961 /* A long long does not fit in a LONGEST. */
1962 shift = (sizeof (ULONGEST) * HOST_CHAR_BIT - 1);
1963 else
1964 shift = (gdbarch_long_long_bit (parse_gdbarch (par_state)) - 1);
1965 high_bit = (ULONGEST) 1 << shift;
1966 unsigned_type = parse_type (par_state)->builtin_unsigned_long_long;
1967 signed_type = parse_type (par_state)->builtin_long_long;
1968 }
1969
1970 putithere->typed_val_int.val = n;
1971
1972 /* If the high bit of the worked out type is set then this number
1973 has to be unsigned. */
1974
1975 if (unsigned_p || (n & high_bit))
1976 {
1977 putithere->typed_val_int.type = unsigned_type;
1978 }
1979 else
1980 {
1981 putithere->typed_val_int.type = signed_type;
1982 }
1983
1984 return INT;
1985 }
1986
1987 /* Temporary obstack used for holding strings. */
1988 static struct obstack tempbuf;
1989 static int tempbuf_init;
1990
1991 /* Parse a C escape sequence. The initial backslash of the sequence
1992 is at (*PTR)[-1]. *PTR will be updated to point to just after the
1993 last character of the sequence. If OUTPUT is not NULL, the
1994 translated form of the escape sequence will be written there. If
1995 OUTPUT is NULL, no output is written and the call will only affect
1996 *PTR. If an escape sequence is expressed in target bytes, then the
1997 entire sequence will simply be copied to OUTPUT. Return 1 if any
1998 character was emitted, 0 otherwise. */
1999
2000 int
2001 c_parse_escape (const char **ptr, struct obstack *output)
2002 {
2003 const char *tokptr = *ptr;
2004 int result = 1;
2005
2006 /* Some escape sequences undergo character set conversion. Those we
2007 translate here. */
2008 switch (*tokptr)
2009 {
2010 /* Hex escapes do not undergo character set conversion, so keep
2011 the escape sequence for later. */
2012 case 'x':
2013 if (output)
2014 obstack_grow_str (output, "\\x");
2015 ++tokptr;
2016 if (!isxdigit (*tokptr))
2017 error (_("\\x escape without a following hex digit"));
2018 while (isxdigit (*tokptr))
2019 {
2020 if (output)
2021 obstack_1grow (output, *tokptr);
2022 ++tokptr;
2023 }
2024 break;
2025
2026 /* Octal escapes do not undergo character set conversion, so
2027 keep the escape sequence for later. */
2028 case '0':
2029 case '1':
2030 case '2':
2031 case '3':
2032 case '4':
2033 case '5':
2034 case '6':
2035 case '7':
2036 {
2037 int i;
2038 if (output)
2039 obstack_grow_str (output, "\\");
2040 for (i = 0;
2041 i < 3 && isdigit (*tokptr) && *tokptr != '8' && *tokptr != '9';
2042 ++i)
2043 {
2044 if (output)
2045 obstack_1grow (output, *tokptr);
2046 ++tokptr;
2047 }
2048 }
2049 break;
2050
2051 /* We handle UCNs later. We could handle them here, but that
2052 would mean a spurious error in the case where the UCN could
2053 be converted to the target charset but not the host
2054 charset. */
2055 case 'u':
2056 case 'U':
2057 {
2058 char c = *tokptr;
2059 int i, len = c == 'U' ? 8 : 4;
2060 if (output)
2061 {
2062 obstack_1grow (output, '\\');
2063 obstack_1grow (output, *tokptr);
2064 }
2065 ++tokptr;
2066 if (!isxdigit (*tokptr))
2067 error (_("\\%c escape without a following hex digit"), c);
2068 for (i = 0; i < len && isxdigit (*tokptr); ++i)
2069 {
2070 if (output)
2071 obstack_1grow (output, *tokptr);
2072 ++tokptr;
2073 }
2074 }
2075 break;
2076
2077 /* We must pass backslash through so that it does not
2078 cause quoting during the second expansion. */
2079 case '\\':
2080 if (output)
2081 obstack_grow_str (output, "\\\\");
2082 ++tokptr;
2083 break;
2084
2085 /* Escapes which undergo conversion. */
2086 case 'a':
2087 if (output)
2088 obstack_1grow (output, '\a');
2089 ++tokptr;
2090 break;
2091 case 'b':
2092 if (output)
2093 obstack_1grow (output, '\b');
2094 ++tokptr;
2095 break;
2096 case 'f':
2097 if (output)
2098 obstack_1grow (output, '\f');
2099 ++tokptr;
2100 break;
2101 case 'n':
2102 if (output)
2103 obstack_1grow (output, '\n');
2104 ++tokptr;
2105 break;
2106 case 'r':
2107 if (output)
2108 obstack_1grow (output, '\r');
2109 ++tokptr;
2110 break;
2111 case 't':
2112 if (output)
2113 obstack_1grow (output, '\t');
2114 ++tokptr;
2115 break;
2116 case 'v':
2117 if (output)
2118 obstack_1grow (output, '\v');
2119 ++tokptr;
2120 break;
2121
2122 /* GCC extension. */
2123 case 'e':
2124 if (output)
2125 obstack_1grow (output, HOST_ESCAPE_CHAR);
2126 ++tokptr;
2127 break;
2128
2129 /* Backslash-newline expands to nothing at all. */
2130 case '\n':
2131 ++tokptr;
2132 result = 0;
2133 break;
2134
2135 /* A few escapes just expand to the character itself. */
2136 case '\'':
2137 case '\"':
2138 case '?':
2139 /* GCC extensions. */
2140 case '(':
2141 case '{':
2142 case '[':
2143 case '%':
2144 /* Unrecognized escapes turn into the character itself. */
2145 default:
2146 if (output)
2147 obstack_1grow (output, *tokptr);
2148 ++tokptr;
2149 break;
2150 }
2151 *ptr = tokptr;
2152 return result;
2153 }
2154
2155 /* Parse a string or character literal from TOKPTR. The string or
2156 character may be wide or unicode. *OUTPTR is set to just after the
2157 end of the literal in the input string. The resulting token is
2158 stored in VALUE. This returns a token value, either STRING or
2159 CHAR, depending on what was parsed. *HOST_CHARS is set to the
2160 number of host characters in the literal. */
2161
2162 static int
2163 parse_string_or_char (const char *tokptr, const char **outptr,
2164 struct typed_stoken *value, int *host_chars)
2165 {
2166 int quote;
2167 c_string_type type;
2168 int is_objc = 0;
2169
2170 /* Build the gdb internal form of the input string in tempbuf. Note
2171 that the buffer is null byte terminated *only* for the
2172 convenience of debugging gdb itself and printing the buffer
2173 contents when the buffer contains no embedded nulls. Gdb does
2174 not depend upon the buffer being null byte terminated, it uses
2175 the length string instead. This allows gdb to handle C strings
2176 (as well as strings in other languages) with embedded null
2177 bytes */
2178
2179 if (!tempbuf_init)
2180 tempbuf_init = 1;
2181 else
2182 obstack_free (&tempbuf, NULL);
2183 obstack_init (&tempbuf);
2184
2185 /* Record the string type. */
2186 if (*tokptr == 'L')
2187 {
2188 type = C_WIDE_STRING;
2189 ++tokptr;
2190 }
2191 else if (*tokptr == 'u')
2192 {
2193 type = C_STRING_16;
2194 ++tokptr;
2195 }
2196 else if (*tokptr == 'U')
2197 {
2198 type = C_STRING_32;
2199 ++tokptr;
2200 }
2201 else if (*tokptr == '@')
2202 {
2203 /* An Objective C string. */
2204 is_objc = 1;
2205 type = C_STRING;
2206 ++tokptr;
2207 }
2208 else
2209 type = C_STRING;
2210
2211 /* Skip the quote. */
2212 quote = *tokptr;
2213 if (quote == '\'')
2214 type |= C_CHAR;
2215 ++tokptr;
2216
2217 *host_chars = 0;
2218
2219 while (*tokptr)
2220 {
2221 char c = *tokptr;
2222 if (c == '\\')
2223 {
2224 ++tokptr;
2225 *host_chars += c_parse_escape (&tokptr, &tempbuf);
2226 }
2227 else if (c == quote)
2228 break;
2229 else
2230 {
2231 obstack_1grow (&tempbuf, c);
2232 ++tokptr;
2233 /* FIXME: this does the wrong thing with multi-byte host
2234 characters. We could use mbrlen here, but that would
2235 make "set host-charset" a bit less useful. */
2236 ++*host_chars;
2237 }
2238 }
2239
2240 if (*tokptr != quote)
2241 {
2242 if (quote == '"')
2243 error (_("Unterminated string in expression."));
2244 else
2245 error (_("Unmatched single quote."));
2246 }
2247 ++tokptr;
2248
2249 value->type = type;
2250 value->ptr = (char *) obstack_base (&tempbuf);
2251 value->length = obstack_object_size (&tempbuf);
2252
2253 *outptr = tokptr;
2254
2255 return quote == '"' ? (is_objc ? NSSTRING : STRING) : CHAR;
2256 }
2257
2258 /* This is used to associate some attributes with a token. */
2259
2260 enum token_flag
2261 {
2262 /* If this bit is set, the token is C++-only. */
2263
2264 FLAG_CXX = 1,
2265
2266 /* If this bit is set, the token is conditional: if there is a
2267 symbol of the same name, then the token is a symbol; otherwise,
2268 the token is a keyword. */
2269
2270 FLAG_SHADOW = 2
2271 };
2272 DEF_ENUM_FLAGS_TYPE (enum token_flag, token_flags);
2273
2274 struct token
2275 {
2276 char *oper;
2277 int token;
2278 enum exp_opcode opcode;
2279 token_flags flags;
2280 };
2281
2282 static const struct token tokentab3[] =
2283 {
2284 {">>=", ASSIGN_MODIFY, BINOP_RSH, 0},
2285 {"<<=", ASSIGN_MODIFY, BINOP_LSH, 0},
2286 {"->*", ARROW_STAR, BINOP_END, FLAG_CXX},
2287 {"...", DOTDOTDOT, BINOP_END, 0}
2288 };
2289
2290 static const struct token tokentab2[] =
2291 {
2292 {"+=", ASSIGN_MODIFY, BINOP_ADD, 0},
2293 {"-=", ASSIGN_MODIFY, BINOP_SUB, 0},
2294 {"*=", ASSIGN_MODIFY, BINOP_MUL, 0},
2295 {"/=", ASSIGN_MODIFY, BINOP_DIV, 0},
2296 {"%=", ASSIGN_MODIFY, BINOP_REM, 0},
2297 {"|=", ASSIGN_MODIFY, BINOP_BITWISE_IOR, 0},
2298 {"&=", ASSIGN_MODIFY, BINOP_BITWISE_AND, 0},
2299 {"^=", ASSIGN_MODIFY, BINOP_BITWISE_XOR, 0},
2300 {"++", INCREMENT, BINOP_END, 0},
2301 {"--", DECREMENT, BINOP_END, 0},
2302 {"->", ARROW, BINOP_END, 0},
2303 {"&&", ANDAND, BINOP_END, 0},
2304 {"||", OROR, BINOP_END, 0},
2305 /* "::" is *not* only C++: gdb overrides its meaning in several
2306 different ways, e.g., 'filename'::func, function::variable. */
2307 {"::", COLONCOLON, BINOP_END, 0},
2308 {"<<", LSH, BINOP_END, 0},
2309 {">>", RSH, BINOP_END, 0},
2310 {"==", EQUAL, BINOP_END, 0},
2311 {"!=", NOTEQUAL, BINOP_END, 0},
2312 {"<=", LEQ, BINOP_END, 0},
2313 {">=", GEQ, BINOP_END, 0},
2314 {".*", DOT_STAR, BINOP_END, FLAG_CXX}
2315 };
2316
2317 /* Identifier-like tokens. */
2318 static const struct token ident_tokens[] =
2319 {
2320 {"unsigned", UNSIGNED, OP_NULL, 0},
2321 {"template", TEMPLATE, OP_NULL, FLAG_CXX},
2322 {"volatile", VOLATILE_KEYWORD, OP_NULL, 0},
2323 {"struct", STRUCT, OP_NULL, 0},
2324 {"signed", SIGNED_KEYWORD, OP_NULL, 0},
2325 {"sizeof", SIZEOF, OP_NULL, 0},
2326 {"double", DOUBLE_KEYWORD, OP_NULL, 0},
2327 {"false", FALSEKEYWORD, OP_NULL, FLAG_CXX},
2328 {"class", CLASS, OP_NULL, FLAG_CXX},
2329 {"union", UNION, OP_NULL, 0},
2330 {"short", SHORT, OP_NULL, 0},
2331 {"const", CONST_KEYWORD, OP_NULL, 0},
2332 {"enum", ENUM, OP_NULL, 0},
2333 {"long", LONG, OP_NULL, 0},
2334 {"true", TRUEKEYWORD, OP_NULL, FLAG_CXX},
2335 {"int", INT_KEYWORD, OP_NULL, 0},
2336 {"new", NEW, OP_NULL, FLAG_CXX},
2337 {"delete", DELETE, OP_NULL, FLAG_CXX},
2338 {"operator", OPERATOR, OP_NULL, FLAG_CXX},
2339
2340 {"and", ANDAND, BINOP_END, FLAG_CXX},
2341 {"and_eq", ASSIGN_MODIFY, BINOP_BITWISE_AND, FLAG_CXX},
2342 {"bitand", '&', OP_NULL, FLAG_CXX},
2343 {"bitor", '|', OP_NULL, FLAG_CXX},
2344 {"compl", '~', OP_NULL, FLAG_CXX},
2345 {"not", '!', OP_NULL, FLAG_CXX},
2346 {"not_eq", NOTEQUAL, BINOP_END, FLAG_CXX},
2347 {"or", OROR, BINOP_END, FLAG_CXX},
2348 {"or_eq", ASSIGN_MODIFY, BINOP_BITWISE_IOR, FLAG_CXX},
2349 {"xor", '^', OP_NULL, FLAG_CXX},
2350 {"xor_eq", ASSIGN_MODIFY, BINOP_BITWISE_XOR, FLAG_CXX},
2351
2352 {"const_cast", CONST_CAST, OP_NULL, FLAG_CXX },
2353 {"dynamic_cast", DYNAMIC_CAST, OP_NULL, FLAG_CXX },
2354 {"static_cast", STATIC_CAST, OP_NULL, FLAG_CXX },
2355 {"reinterpret_cast", REINTERPRET_CAST, OP_NULL, FLAG_CXX },
2356
2357 {"__typeof__", TYPEOF, OP_TYPEOF, 0 },
2358 {"__typeof", TYPEOF, OP_TYPEOF, 0 },
2359 {"typeof", TYPEOF, OP_TYPEOF, FLAG_SHADOW },
2360 {"__decltype", DECLTYPE, OP_DECLTYPE, FLAG_CXX },
2361 {"decltype", DECLTYPE, OP_DECLTYPE, FLAG_CXX | FLAG_SHADOW },
2362
2363 {"typeid", TYPEID, OP_TYPEID, FLAG_CXX}
2364 };
2365
2366 /* When we find that lexptr (the global var defined in parse.c) is
2367 pointing at a macro invocation, we expand the invocation, and call
2368 scan_macro_expansion to save the old lexptr here and point lexptr
2369 into the expanded text. When we reach the end of that, we call
2370 end_macro_expansion to pop back to the value we saved here. The
2371 macro expansion code promises to return only fully-expanded text,
2372 so we don't need to "push" more than one level.
2373
2374 This is disgusting, of course. It would be cleaner to do all macro
2375 expansion beforehand, and then hand that to lexptr. But we don't
2376 really know where the expression ends. Remember, in a command like
2377
2378 (gdb) break *ADDRESS if CONDITION
2379
2380 we evaluate ADDRESS in the scope of the current frame, but we
2381 evaluate CONDITION in the scope of the breakpoint's location. So
2382 it's simply wrong to try to macro-expand the whole thing at once. */
2383 static const char *macro_original_text;
2384
2385 /* We save all intermediate macro expansions on this obstack for the
2386 duration of a single parse. The expansion text may sometimes have
2387 to live past the end of the expansion, due to yacc lookahead.
2388 Rather than try to be clever about saving the data for a single
2389 token, we simply keep it all and delete it after parsing has
2390 completed. */
2391 static struct obstack expansion_obstack;
2392
2393 static void
2394 scan_macro_expansion (char *expansion)
2395 {
2396 char *copy;
2397
2398 /* We'd better not be trying to push the stack twice. */
2399 gdb_assert (! macro_original_text);
2400
2401 /* Copy to the obstack, and then free the intermediate
2402 expansion. */
2403 copy = (char *) obstack_copy0 (&expansion_obstack, expansion,
2404 strlen (expansion));
2405 xfree (expansion);
2406
2407 /* Save the old lexptr value, so we can return to it when we're done
2408 parsing the expanded text. */
2409 macro_original_text = lexptr;
2410 lexptr = copy;
2411 }
2412
2413 static int
2414 scanning_macro_expansion (void)
2415 {
2416 return macro_original_text != 0;
2417 }
2418
2419 static void
2420 finished_macro_expansion (void)
2421 {
2422 /* There'd better be something to pop back to. */
2423 gdb_assert (macro_original_text);
2424
2425 /* Pop back to the original text. */
2426 lexptr = macro_original_text;
2427 macro_original_text = 0;
2428 }
2429
2430 static void
2431 scan_macro_cleanup (void *dummy)
2432 {
2433 if (macro_original_text)
2434 finished_macro_expansion ();
2435
2436 obstack_free (&expansion_obstack, NULL);
2437 }
2438
2439 /* Return true iff the token represents a C++ cast operator. */
2440
2441 static int
2442 is_cast_operator (const char *token, int len)
2443 {
2444 return (! strncmp (token, "dynamic_cast", len)
2445 || ! strncmp (token, "static_cast", len)
2446 || ! strncmp (token, "reinterpret_cast", len)
2447 || ! strncmp (token, "const_cast", len));
2448 }
2449
2450 /* The scope used for macro expansion. */
2451 static struct macro_scope *expression_macro_scope;
2452
2453 /* This is set if a NAME token appeared at the very end of the input
2454 string, with no whitespace separating the name from the EOF. This
2455 is used only when parsing to do field name completion. */
2456 static int saw_name_at_eof;
2457
2458 /* This is set if the previously-returned token was a structure
2459 operator -- either '.' or ARROW. This is used only when parsing to
2460 do field name completion. */
2461 static int last_was_structop;
2462
2463 /* Read one token, getting characters through lexptr. */
2464
2465 static int
2466 lex_one_token (struct parser_state *par_state, int *is_quoted_name)
2467 {
2468 int c;
2469 int namelen;
2470 unsigned int i;
2471 const char *tokstart;
2472 int saw_structop = last_was_structop;
2473 char *copy;
2474
2475 last_was_structop = 0;
2476 *is_quoted_name = 0;
2477
2478 retry:
2479
2480 /* Check if this is a macro invocation that we need to expand. */
2481 if (! scanning_macro_expansion ())
2482 {
2483 char *expanded = macro_expand_next (&lexptr,
2484 standard_macro_lookup,
2485 expression_macro_scope);
2486
2487 if (expanded)
2488 scan_macro_expansion (expanded);
2489 }
2490
2491 prev_lexptr = lexptr;
2492
2493 tokstart = lexptr;
2494 /* See if it is a special token of length 3. */
2495 for (i = 0; i < sizeof tokentab3 / sizeof tokentab3[0]; i++)
2496 if (strncmp (tokstart, tokentab3[i].oper, 3) == 0)
2497 {
2498 if ((tokentab3[i].flags & FLAG_CXX) != 0
2499 && parse_language (par_state)->la_language != language_cplus)
2500 break;
2501
2502 lexptr += 3;
2503 yylval.opcode = tokentab3[i].opcode;
2504 return tokentab3[i].token;
2505 }
2506
2507 /* See if it is a special token of length 2. */
2508 for (i = 0; i < sizeof tokentab2 / sizeof tokentab2[0]; i++)
2509 if (strncmp (tokstart, tokentab2[i].oper, 2) == 0)
2510 {
2511 if ((tokentab2[i].flags & FLAG_CXX) != 0
2512 && parse_language (par_state)->la_language != language_cplus)
2513 break;
2514
2515 lexptr += 2;
2516 yylval.opcode = tokentab2[i].opcode;
2517 if (parse_completion && tokentab2[i].token == ARROW)
2518 last_was_structop = 1;
2519 return tokentab2[i].token;
2520 }
2521
2522 switch (c = *tokstart)
2523 {
2524 case 0:
2525 /* If we were just scanning the result of a macro expansion,
2526 then we need to resume scanning the original text.
2527 If we're parsing for field name completion, and the previous
2528 token allows such completion, return a COMPLETE token.
2529 Otherwise, we were already scanning the original text, and
2530 we're really done. */
2531 if (scanning_macro_expansion ())
2532 {
2533 finished_macro_expansion ();
2534 goto retry;
2535 }
2536 else if (saw_name_at_eof)
2537 {
2538 saw_name_at_eof = 0;
2539 return COMPLETE;
2540 }
2541 else if (saw_structop)
2542 return COMPLETE;
2543 else
2544 return 0;
2545
2546 case ' ':
2547 case '\t':
2548 case '\n':
2549 lexptr++;
2550 goto retry;
2551
2552 case '[':
2553 case '(':
2554 paren_depth++;
2555 lexptr++;
2556 if (parse_language (par_state)->la_language == language_objc
2557 && c == '[')
2558 return OBJC_LBRAC;
2559 return c;
2560
2561 case ']':
2562 case ')':
2563 if (paren_depth == 0)
2564 return 0;
2565 paren_depth--;
2566 lexptr++;
2567 return c;
2568
2569 case ',':
2570 if (comma_terminates
2571 && paren_depth == 0
2572 && ! scanning_macro_expansion ())
2573 return 0;
2574 lexptr++;
2575 return c;
2576
2577 case '.':
2578 /* Might be a floating point number. */
2579 if (lexptr[1] < '0' || lexptr[1] > '9')
2580 {
2581 if (parse_completion)
2582 last_was_structop = 1;
2583 goto symbol; /* Nope, must be a symbol. */
2584 }
2585 /* FALL THRU into number case. */
2586
2587 case '0':
2588 case '1':
2589 case '2':
2590 case '3':
2591 case '4':
2592 case '5':
2593 case '6':
2594 case '7':
2595 case '8':
2596 case '9':
2597 {
2598 /* It's a number. */
2599 int got_dot = 0, got_e = 0, toktype;
2600 const char *p = tokstart;
2601 int hex = input_radix > 10;
2602
2603 if (c == '0' && (p[1] == 'x' || p[1] == 'X'))
2604 {
2605 p += 2;
2606 hex = 1;
2607 }
2608 else if (c == '0' && (p[1]=='t' || p[1]=='T' || p[1]=='d' || p[1]=='D'))
2609 {
2610 p += 2;
2611 hex = 0;
2612 }
2613
2614 for (;; ++p)
2615 {
2616 /* This test includes !hex because 'e' is a valid hex digit
2617 and thus does not indicate a floating point number when
2618 the radix is hex. */
2619 if (!hex && !got_e && (*p == 'e' || *p == 'E'))
2620 got_dot = got_e = 1;
2621 /* This test does not include !hex, because a '.' always indicates
2622 a decimal floating point number regardless of the radix. */
2623 else if (!got_dot && *p == '.')
2624 got_dot = 1;
2625 else if (got_e && (p[-1] == 'e' || p[-1] == 'E')
2626 && (*p == '-' || *p == '+'))
2627 /* This is the sign of the exponent, not the end of the
2628 number. */
2629 continue;
2630 /* We will take any letters or digits. parse_number will
2631 complain if past the radix, or if L or U are not final. */
2632 else if ((*p < '0' || *p > '9')
2633 && ((*p < 'a' || *p > 'z')
2634 && (*p < 'A' || *p > 'Z')))
2635 break;
2636 }
2637 toktype = parse_number (par_state, tokstart, p - tokstart,
2638 got_dot|got_e, &yylval);
2639 if (toktype == ERROR)
2640 {
2641 char *err_copy = (char *) alloca (p - tokstart + 1);
2642
2643 memcpy (err_copy, tokstart, p - tokstart);
2644 err_copy[p - tokstart] = 0;
2645 error (_("Invalid number \"%s\"."), err_copy);
2646 }
2647 lexptr = p;
2648 return toktype;
2649 }
2650
2651 case '@':
2652 {
2653 const char *p = &tokstart[1];
2654 size_t len = strlen ("entry");
2655
2656 if (parse_language (par_state)->la_language == language_objc)
2657 {
2658 size_t len = strlen ("selector");
2659
2660 if (strncmp (p, "selector", len) == 0
2661 && (p[len] == '\0' || isspace (p[len])))
2662 {
2663 lexptr = p + len;
2664 return SELECTOR;
2665 }
2666 else if (*p == '"')
2667 goto parse_string;
2668 }
2669
2670 while (isspace (*p))
2671 p++;
2672 if (strncmp (p, "entry", len) == 0 && !isalnum (p[len])
2673 && p[len] != '_')
2674 {
2675 lexptr = &p[len];
2676 return ENTRY;
2677 }
2678 }
2679 /* FALLTHRU */
2680 case '+':
2681 case '-':
2682 case '*':
2683 case '/':
2684 case '%':
2685 case '|':
2686 case '&':
2687 case '^':
2688 case '~':
2689 case '!':
2690 case '<':
2691 case '>':
2692 case '?':
2693 case ':':
2694 case '=':
2695 case '{':
2696 case '}':
2697 symbol:
2698 lexptr++;
2699 return c;
2700
2701 case 'L':
2702 case 'u':
2703 case 'U':
2704 if (tokstart[1] != '"' && tokstart[1] != '\'')
2705 break;
2706 /* Fall through. */
2707 case '\'':
2708 case '"':
2709
2710 parse_string:
2711 {
2712 int host_len;
2713 int result = parse_string_or_char (tokstart, &lexptr, &yylval.tsval,
2714 &host_len);
2715 if (result == CHAR)
2716 {
2717 if (host_len == 0)
2718 error (_("Empty character constant."));
2719 else if (host_len > 2 && c == '\'')
2720 {
2721 ++tokstart;
2722 namelen = lexptr - tokstart - 1;
2723 *is_quoted_name = 1;
2724
2725 goto tryname;
2726 }
2727 else if (host_len > 1)
2728 error (_("Invalid character constant."));
2729 }
2730 return result;
2731 }
2732 }
2733
2734 if (!(c == '_' || c == '$'
2735 || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')))
2736 /* We must have come across a bad character (e.g. ';'). */
2737 error (_("Invalid character '%c' in expression."), c);
2738
2739 /* It's a name. See how long it is. */
2740 namelen = 0;
2741 for (c = tokstart[namelen];
2742 (c == '_' || c == '$' || (c >= '0' && c <= '9')
2743 || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '<');)
2744 {
2745 /* Template parameter lists are part of the name.
2746 FIXME: This mishandles `print $a<4&&$a>3'. */
2747
2748 if (c == '<')
2749 {
2750 if (! is_cast_operator (tokstart, namelen))
2751 {
2752 /* Scan ahead to get rest of the template specification. Note
2753 that we look ahead only when the '<' adjoins non-whitespace
2754 characters; for comparison expressions, e.g. "a < b > c",
2755 there must be spaces before the '<', etc. */
2756 const char *p = find_template_name_end (tokstart + namelen);
2757
2758 if (p)
2759 namelen = p - tokstart;
2760 }
2761 break;
2762 }
2763 c = tokstart[++namelen];
2764 }
2765
2766 /* The token "if" terminates the expression and is NOT removed from
2767 the input stream. It doesn't count if it appears in the
2768 expansion of a macro. */
2769 if (namelen == 2
2770 && tokstart[0] == 'i'
2771 && tokstart[1] == 'f'
2772 && ! scanning_macro_expansion ())
2773 {
2774 return 0;
2775 }
2776
2777 /* For the same reason (breakpoint conditions), "thread N"
2778 terminates the expression. "thread" could be an identifier, but
2779 an identifier is never followed by a number without intervening
2780 punctuation. "task" is similar. Handle abbreviations of these,
2781 similarly to breakpoint.c:find_condition_and_thread. */
2782 if (namelen >= 1
2783 && (strncmp (tokstart, "thread", namelen) == 0
2784 || strncmp (tokstart, "task", namelen) == 0)
2785 && (tokstart[namelen] == ' ' || tokstart[namelen] == '\t')
2786 && ! scanning_macro_expansion ())
2787 {
2788 const char *p = tokstart + namelen + 1;
2789
2790 while (*p == ' ' || *p == '\t')
2791 p++;
2792 if (*p >= '0' && *p <= '9')
2793 return 0;
2794 }
2795
2796 lexptr += namelen;
2797
2798 tryname:
2799
2800 yylval.sval.ptr = tokstart;
2801 yylval.sval.length = namelen;
2802
2803 /* Catch specific keywords. */
2804 copy = copy_name (yylval.sval);
2805 for (i = 0; i < sizeof ident_tokens / sizeof ident_tokens[0]; i++)
2806 if (strcmp (copy, ident_tokens[i].oper) == 0)
2807 {
2808 if ((ident_tokens[i].flags & FLAG_CXX) != 0
2809 && parse_language (par_state)->la_language != language_cplus)
2810 break;
2811
2812 if ((ident_tokens[i].flags & FLAG_SHADOW) != 0)
2813 {
2814 struct field_of_this_result is_a_field_of_this;
2815
2816 if (lookup_symbol (copy, expression_context_block,
2817 VAR_DOMAIN,
2818 (parse_language (par_state)->la_language
2819 == language_cplus ? &is_a_field_of_this
2820 : NULL)).symbol
2821 != NULL)
2822 {
2823 /* The keyword is shadowed. */
2824 break;
2825 }
2826 }
2827
2828 /* It is ok to always set this, even though we don't always
2829 strictly need to. */
2830 yylval.opcode = ident_tokens[i].opcode;
2831 return ident_tokens[i].token;
2832 }
2833
2834 if (*tokstart == '$')
2835 return VARIABLE;
2836
2837 if (parse_completion && *lexptr == '\0')
2838 saw_name_at_eof = 1;
2839
2840 yylval.ssym.stoken = yylval.sval;
2841 yylval.ssym.sym.symbol = NULL;
2842 yylval.ssym.sym.block = NULL;
2843 yylval.ssym.is_a_field_of_this = 0;
2844 return NAME;
2845 }
2846
2847 /* An object of this type is pushed on a FIFO by the "outer" lexer. */
2848 typedef struct
2849 {
2850 int token;
2851 YYSTYPE value;
2852 } token_and_value;
2853
2854 DEF_VEC_O (token_and_value);
2855
2856 /* A FIFO of tokens that have been read but not yet returned to the
2857 parser. */
2858 static VEC (token_and_value) *token_fifo;
2859
2860 /* Non-zero if the lexer should return tokens from the FIFO. */
2861 static int popping;
2862
2863 /* Temporary storage for c_lex; this holds symbol names as they are
2864 built up. */
2865 static struct obstack name_obstack;
2866
2867 /* Classify a NAME token. The contents of the token are in `yylval'.
2868 Updates yylval and returns the new token type. BLOCK is the block
2869 in which lookups start; this can be NULL to mean the global scope.
2870 IS_QUOTED_NAME is non-zero if the name token was originally quoted
2871 in single quotes. */
2872
2873 static int
2874 classify_name (struct parser_state *par_state, const struct block *block,
2875 int is_quoted_name)
2876 {
2877 struct block_symbol bsym;
2878 char *copy;
2879 struct field_of_this_result is_a_field_of_this;
2880
2881 copy = copy_name (yylval.sval);
2882
2883 /* Initialize this in case we *don't* use it in this call; that way
2884 we can refer to it unconditionally below. */
2885 memset (&is_a_field_of_this, 0, sizeof (is_a_field_of_this));
2886
2887 bsym = lookup_symbol (copy, block, VAR_DOMAIN,
2888 parse_language (par_state)->la_name_of_this
2889 ? &is_a_field_of_this : NULL);
2890
2891 if (bsym.symbol && SYMBOL_CLASS (bsym.symbol) == LOC_BLOCK)
2892 {
2893 yylval.ssym.sym = bsym;
2894 yylval.ssym.is_a_field_of_this = is_a_field_of_this.type != NULL;
2895 return BLOCKNAME;
2896 }
2897 else if (!bsym.symbol)
2898 {
2899 /* If we found a field of 'this', we might have erroneously
2900 found a constructor where we wanted a type name. Handle this
2901 case by noticing that we found a constructor and then look up
2902 the type tag instead. */
2903 if (is_a_field_of_this.type != NULL
2904 && is_a_field_of_this.fn_field != NULL
2905 && TYPE_FN_FIELD_CONSTRUCTOR (is_a_field_of_this.fn_field->fn_fields,
2906 0))
2907 {
2908 struct field_of_this_result inner_is_a_field_of_this;
2909
2910 bsym = lookup_symbol (copy, block, STRUCT_DOMAIN,
2911 &inner_is_a_field_of_this);
2912 if (bsym.symbol != NULL)
2913 {
2914 yylval.tsym.type = SYMBOL_TYPE (bsym.symbol);
2915 return TYPENAME;
2916 }
2917 }
2918
2919 /* If we found a field, then we want to prefer it over a
2920 filename. However, if the name was quoted, then it is better
2921 to check for a filename or a block, since this is the only
2922 way the user has of requiring the extension to be used. */
2923 if (is_a_field_of_this.type == NULL || is_quoted_name)
2924 {
2925 /* See if it's a file name. */
2926 struct symtab *symtab;
2927
2928 symtab = lookup_symtab (copy);
2929 if (symtab)
2930 {
2931 yylval.bval = BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (symtab),
2932 STATIC_BLOCK);
2933 return FILENAME;
2934 }
2935 }
2936 }
2937
2938 if (bsym.symbol && SYMBOL_CLASS (bsym.symbol) == LOC_TYPEDEF)
2939 {
2940 yylval.tsym.type = SYMBOL_TYPE (bsym.symbol);
2941 return TYPENAME;
2942 }
2943
2944 /* See if it's an ObjC classname. */
2945 if (parse_language (par_state)->la_language == language_objc && !bsym.symbol)
2946 {
2947 CORE_ADDR Class = lookup_objc_class (parse_gdbarch (par_state), copy);
2948 if (Class)
2949 {
2950 struct symbol *sym;
2951
2952 yylval.theclass.theclass = Class;
2953 sym = lookup_struct_typedef (copy, expression_context_block, 1);
2954 if (sym)
2955 yylval.theclass.type = SYMBOL_TYPE (sym);
2956 return CLASSNAME;
2957 }
2958 }
2959
2960 /* Input names that aren't symbols but ARE valid hex numbers, when
2961 the input radix permits them, can be names or numbers depending
2962 on the parse. Note we support radixes > 16 here. */
2963 if (!bsym.symbol
2964 && ((copy[0] >= 'a' && copy[0] < 'a' + input_radix - 10)
2965 || (copy[0] >= 'A' && copy[0] < 'A' + input_radix - 10)))
2966 {
2967 YYSTYPE newlval; /* Its value is ignored. */
2968 int hextype = parse_number (par_state, copy, yylval.sval.length,
2969 0, &newlval);
2970
2971 if (hextype == INT)
2972 {
2973 yylval.ssym.sym = bsym;
2974 yylval.ssym.is_a_field_of_this = is_a_field_of_this.type != NULL;
2975 return NAME_OR_INT;
2976 }
2977 }
2978
2979 /* Any other kind of symbol */
2980 yylval.ssym.sym = bsym;
2981 yylval.ssym.is_a_field_of_this = is_a_field_of_this.type != NULL;
2982
2983 if (bsym.symbol == NULL
2984 && parse_language (par_state)->la_language == language_cplus
2985 && is_a_field_of_this.type == NULL
2986 && lookup_minimal_symbol (copy, NULL, NULL).minsym == NULL)
2987 return UNKNOWN_CPP_NAME;
2988
2989 return NAME;
2990 }
2991
2992 /* Like classify_name, but used by the inner loop of the lexer, when a
2993 name might have already been seen. CONTEXT is the context type, or
2994 NULL if this is the first component of a name. */
2995
2996 static int
2997 classify_inner_name (struct parser_state *par_state,
2998 const struct block *block, struct type *context)
2999 {
3000 struct type *type;
3001 char *copy;
3002
3003 if (context == NULL)
3004 return classify_name (par_state, block, 0);
3005
3006 type = check_typedef (context);
3007 if (!type_aggregate_p (type))
3008 return ERROR;
3009
3010 copy = copy_name (yylval.ssym.stoken);
3011 /* N.B. We assume the symbol can only be in VAR_DOMAIN. */
3012 yylval.ssym.sym = cp_lookup_nested_symbol (type, copy, block, VAR_DOMAIN);
3013
3014 /* If no symbol was found, search for a matching base class named
3015 COPY. This will allow users to enter qualified names of class members
3016 relative to the `this' pointer. */
3017 if (yylval.ssym.sym.symbol == NULL)
3018 {
3019 struct type *base_type = cp_find_type_baseclass_by_name (type, copy);
3020
3021 if (base_type != NULL)
3022 {
3023 yylval.tsym.type = base_type;
3024 return TYPENAME;
3025 }
3026
3027 return ERROR;
3028 }
3029
3030 switch (SYMBOL_CLASS (yylval.ssym.sym.symbol))
3031 {
3032 case LOC_BLOCK:
3033 case LOC_LABEL:
3034 /* cp_lookup_nested_symbol might have accidentally found a constructor
3035 named COPY when we really wanted a base class of the same name.
3036 Double-check this case by looking for a base class. */
3037 {
3038 struct type *base_type = cp_find_type_baseclass_by_name (type, copy);
3039
3040 if (base_type != NULL)
3041 {
3042 yylval.tsym.type = base_type;
3043 return TYPENAME;
3044 }
3045 }
3046 return ERROR;
3047
3048 case LOC_TYPEDEF:
3049 yylval.tsym.type = SYMBOL_TYPE (yylval.ssym.sym.symbol);
3050 return TYPENAME;
3051
3052 default:
3053 return NAME;
3054 }
3055 internal_error (__FILE__, __LINE__, _("not reached"));
3056 }
3057
3058 /* The outer level of a two-level lexer. This calls the inner lexer
3059 to return tokens. It then either returns these tokens, or
3060 aggregates them into a larger token. This lets us work around a
3061 problem in our parsing approach, where the parser could not
3062 distinguish between qualified names and qualified types at the
3063 right point.
3064
3065 This approach is still not ideal, because it mishandles template
3066 types. See the comment in lex_one_token for an example. However,
3067 this is still an improvement over the earlier approach, and will
3068 suffice until we move to better parsing technology. */
3069
3070 static int
3071 yylex (void)
3072 {
3073 token_and_value current;
3074 int first_was_coloncolon, last_was_coloncolon;
3075 struct type *context_type = NULL;
3076 int last_to_examine, next_to_examine, checkpoint;
3077 const struct block *search_block;
3078 int is_quoted_name;
3079
3080 if (popping && !VEC_empty (token_and_value, token_fifo))
3081 goto do_pop;
3082 popping = 0;
3083
3084 /* Read the first token and decide what to do. Most of the
3085 subsequent code is C++-only; but also depends on seeing a "::" or
3086 name-like token. */
3087 current.token = lex_one_token (pstate, &is_quoted_name);
3088 if (current.token == NAME)
3089 current.token = classify_name (pstate, expression_context_block,
3090 is_quoted_name);
3091 if (parse_language (pstate)->la_language != language_cplus
3092 || (current.token != TYPENAME && current.token != COLONCOLON
3093 && current.token != FILENAME))
3094 return current.token;
3095
3096 /* Read any sequence of alternating "::" and name-like tokens into
3097 the token FIFO. */
3098 current.value = yylval;
3099 VEC_safe_push (token_and_value, token_fifo, &current);
3100 last_was_coloncolon = current.token == COLONCOLON;
3101 while (1)
3102 {
3103 int ignore;
3104
3105 /* We ignore quoted names other than the very first one.
3106 Subsequent ones do not have any special meaning. */
3107 current.token = lex_one_token (pstate, &ignore);
3108 current.value = yylval;
3109 VEC_safe_push (token_and_value, token_fifo, &current);
3110
3111 if ((last_was_coloncolon && current.token != NAME)
3112 || (!last_was_coloncolon && current.token != COLONCOLON))
3113 break;
3114 last_was_coloncolon = !last_was_coloncolon;
3115 }
3116 popping = 1;
3117
3118 /* We always read one extra token, so compute the number of tokens
3119 to examine accordingly. */
3120 last_to_examine = VEC_length (token_and_value, token_fifo) - 2;
3121 next_to_examine = 0;
3122
3123 current = *VEC_index (token_and_value, token_fifo, next_to_examine);
3124 ++next_to_examine;
3125
3126 obstack_free (&name_obstack, obstack_base (&name_obstack));
3127 checkpoint = 0;
3128 if (current.token == FILENAME)
3129 search_block = current.value.bval;
3130 else if (current.token == COLONCOLON)
3131 search_block = NULL;
3132 else
3133 {
3134 gdb_assert (current.token == TYPENAME);
3135 search_block = expression_context_block;
3136 obstack_grow (&name_obstack, current.value.sval.ptr,
3137 current.value.sval.length);
3138 context_type = current.value.tsym.type;
3139 checkpoint = 1;
3140 }
3141
3142 first_was_coloncolon = current.token == COLONCOLON;
3143 last_was_coloncolon = first_was_coloncolon;
3144
3145 while (next_to_examine <= last_to_examine)
3146 {
3147 token_and_value *next;
3148
3149 next = VEC_index (token_and_value, token_fifo, next_to_examine);
3150 ++next_to_examine;
3151
3152 if (next->token == NAME && last_was_coloncolon)
3153 {
3154 int classification;
3155
3156 yylval = next->value;
3157 classification = classify_inner_name (pstate, search_block,
3158 context_type);
3159 /* We keep going until we either run out of names, or until
3160 we have a qualified name which is not a type. */
3161 if (classification != TYPENAME && classification != NAME)
3162 break;
3163
3164 /* Accept up to this token. */
3165 checkpoint = next_to_examine;
3166
3167 /* Update the partial name we are constructing. */
3168 if (context_type != NULL)
3169 {
3170 /* We don't want to put a leading "::" into the name. */
3171 obstack_grow_str (&name_obstack, "::");
3172 }
3173 obstack_grow (&name_obstack, next->value.sval.ptr,
3174 next->value.sval.length);
3175
3176 yylval.sval.ptr = (const char *) obstack_base (&name_obstack);
3177 yylval.sval.length = obstack_object_size (&name_obstack);
3178 current.value = yylval;
3179 current.token = classification;
3180
3181 last_was_coloncolon = 0;
3182
3183 if (classification == NAME)
3184 break;
3185
3186 context_type = yylval.tsym.type;
3187 }
3188 else if (next->token == COLONCOLON && !last_was_coloncolon)
3189 last_was_coloncolon = 1;
3190 else
3191 {
3192 /* We've reached the end of the name. */
3193 break;
3194 }
3195 }
3196
3197 /* If we have a replacement token, install it as the first token in
3198 the FIFO, and delete the other constituent tokens. */
3199 if (checkpoint > 0)
3200 {
3201 current.value.sval.ptr
3202 = (const char *) obstack_copy0 (&expansion_obstack,
3203 current.value.sval.ptr,
3204 current.value.sval.length);
3205
3206 VEC_replace (token_and_value, token_fifo, 0, &current);
3207 if (checkpoint > 1)
3208 VEC_block_remove (token_and_value, token_fifo, 1, checkpoint - 1);
3209 }
3210
3211 do_pop:
3212 current = *VEC_index (token_and_value, token_fifo, 0);
3213 VEC_ordered_remove (token_and_value, token_fifo, 0);
3214 yylval = current.value;
3215 return current.token;
3216 }
3217
3218 int
3219 c_parse (struct parser_state *par_state)
3220 {
3221 int result;
3222 struct cleanup *back_to;
3223
3224 /* Setting up the parser state. */
3225 gdb_assert (par_state != NULL);
3226 pstate = par_state;
3227
3228 back_to = make_cleanup (free_current_contents, &expression_macro_scope);
3229 make_cleanup_clear_parser_state (&pstate);
3230
3231 /* Set up the scope for macro expansion. */
3232 expression_macro_scope = NULL;
3233
3234 if (expression_context_block)
3235 expression_macro_scope
3236 = sal_macro_scope (find_pc_line (expression_context_pc, 0));
3237 else
3238 expression_macro_scope = default_macro_scope ();
3239 if (! expression_macro_scope)
3240 expression_macro_scope = user_macro_scope ();
3241
3242 /* Initialize macro expansion code. */
3243 obstack_init (&expansion_obstack);
3244 gdb_assert (! macro_original_text);
3245 make_cleanup (scan_macro_cleanup, 0);
3246
3247 make_cleanup_restore_integer (&yydebug);
3248 yydebug = parser_debug;
3249
3250 /* Initialize some state used by the lexer. */
3251 last_was_structop = 0;
3252 saw_name_at_eof = 0;
3253
3254 VEC_free (token_and_value, token_fifo);
3255 popping = 0;
3256 obstack_init (&name_obstack);
3257 make_cleanup_obstack_free (&name_obstack);
3258
3259 result = yyparse ();
3260 do_cleanups (back_to);
3261
3262 return result;
3263 }
3264
3265 #ifdef YYBISON
3266
3267 /* This is called via the YYPRINT macro when parser debugging is
3268 enabled. It prints a token's value. */
3269
3270 static void
3271 c_print_token (FILE *file, int type, YYSTYPE value)
3272 {
3273 switch (type)
3274 {
3275 case INT:
3276 fprintf (file, "typed_val_int<%s, %s>",
3277 TYPE_SAFE_NAME (value.typed_val_int.type),
3278 pulongest (value.typed_val_int.val));
3279 break;
3280
3281 case CHAR:
3282 case STRING:
3283 {
3284 char *copy = (char *) alloca (value.tsval.length + 1);
3285
3286 memcpy (copy, value.tsval.ptr, value.tsval.length);
3287 copy[value.tsval.length] = '\0';
3288
3289 fprintf (file, "tsval<type=%d, %s>", value.tsval.type, copy);
3290 }
3291 break;
3292
3293 case NSSTRING:
3294 case VARIABLE:
3295 fprintf (file, "sval<%s>", copy_name (value.sval));
3296 break;
3297
3298 case TYPENAME:
3299 fprintf (file, "tsym<type=%s, name=%s>",
3300 TYPE_SAFE_NAME (value.tsym.type),
3301 copy_name (value.tsym.stoken));
3302 break;
3303
3304 case NAME:
3305 case UNKNOWN_CPP_NAME:
3306 case NAME_OR_INT:
3307 case BLOCKNAME:
3308 fprintf (file, "ssym<name=%s, sym=%s, field_of_this=%d>",
3309 copy_name (value.ssym.stoken),
3310 (value.ssym.sym.symbol == NULL
3311 ? "(null)" : SYMBOL_PRINT_NAME (value.ssym.sym.symbol)),
3312 value.ssym.is_a_field_of_this);
3313 break;
3314
3315 case FILENAME:
3316 fprintf (file, "bval<%s>", host_address_to_string (value.bval));
3317 break;
3318 }
3319 }
3320
3321 #endif
3322
3323 void
3324 yyerror (char *msg)
3325 {
3326 if (prev_lexptr)
3327 lexptr = prev_lexptr;
3328
3329 error (_("A %s in expression, near `%s'."), (msg ? msg : "error"), lexptr);
3330 }
GDB Binutils - Deliverables
This page took 0.094364 seconds and 5 git commands to generate.