projects / deliverable / binutils-gdb.git / blob
? search:


e0abbd83ddb0ef32c4e99a2ea812313cf8ef721f
[deliverable/binutils-gdb.git] / gdb / c-exp.y
1 /* YACC parser for C expressions, for GDB.
2 Copyright (C) 1986-2019 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 "c-support.h"
46 #include "bfd.h" /* Required by objfiles.h. */
47 #include "symfile.h" /* Required by objfiles.h. */
48 #include "objfiles.h" /* For have_full_symbols and have_partial_symbols */
49 #include "charset.h"
50 #include "block.h"
51 #include "cp-support.h"
52 #include "macroscope.h"
53 #include "objc-lang.h"
54 #include "typeprint.h"
55 #include "cp-abi.h"
56 #include "type-stack.h"
57
58 #define parse_type(ps) builtin_type (ps->gdbarch ())
59
60 /* Remap normal yacc parser interface names (yyparse, yylex, yyerror,
61 etc). */
62 #define GDB_YY_REMAP_PREFIX c_
63 #include "yy-remap.h"
64
65 /* The state of the parser, used internally when we are parsing the
66 expression. */
67
68 static struct parser_state *pstate = NULL;
69
70 /* Data that must be held for the duration of a parse. */
71
72 struct c_parse_state
73 {
74 /* These are used to hold type lists and type stacks that are
75 allocated during the parse. */
76 std::vector<std::unique_ptr<std::vector<struct type *>>> type_lists;
77 std::vector<std::unique_ptr<struct type_stack>> type_stacks;
78
79 /* Storage for some strings allocated during the parse. */
80 std::vector<gdb::unique_xmalloc_ptr<char>> strings;
81
82 /* When we find that lexptr (the global var defined in parse.c) is
83 pointing at a macro invocation, we expand the invocation, and call
84 scan_macro_expansion to save the old lexptr here and point lexptr
85 into the expanded text. When we reach the end of that, we call
86 end_macro_expansion to pop back to the value we saved here. The
87 macro expansion code promises to return only fully-expanded text,
88 so we don't need to "push" more than one level.
89
90 This is disgusting, of course. It would be cleaner to do all macro
91 expansion beforehand, and then hand that to lexptr. But we don't
92 really know where the expression ends. Remember, in a command like
93
94 (gdb) break *ADDRESS if CONDITION
95
96 we evaluate ADDRESS in the scope of the current frame, but we
97 evaluate CONDITION in the scope of the breakpoint's location. So
98 it's simply wrong to try to macro-expand the whole thing at once. */
99 const char *macro_original_text = nullptr;
100
101 /* We save all intermediate macro expansions on this obstack for the
102 duration of a single parse. The expansion text may sometimes have
103 to live past the end of the expansion, due to yacc lookahead.
104 Rather than try to be clever about saving the data for a single
105 token, we simply keep it all and delete it after parsing has
106 completed. */
107 auto_obstack expansion_obstack;
108
109 /* The type stack. */
110 struct type_stack type_stack;
111 };
112
113 /* This is set and cleared in c_parse. */
114
115 static struct c_parse_state *cpstate;
116
117 int yyparse (void);
118
119 static int yylex (void);
120
121 static void yyerror (const char *);
122
123 static int type_aggregate_p (struct type *);
124
125 %}
126
127 /* Although the yacc "value" of an expression is not used,
128 since the result is stored in the structure being created,
129 other node types do have values. */
130
131 %union
132 {
133 LONGEST lval;
134 struct {
135 LONGEST val;
136 struct type *type;
137 } typed_val_int;
138 struct {
139 gdb_byte val[16];
140 struct type *type;
141 } typed_val_float;
142 struct type *tval;
143 struct stoken sval;
144 struct typed_stoken tsval;
145 struct ttype tsym;
146 struct symtoken ssym;
147 int voidval;
148 const struct block *bval;
149 enum exp_opcode opcode;
150
151 struct stoken_vector svec;
152 std::vector<struct type *> *tvec;
153
154 struct type_stack *type_stack;
155
156 struct objc_class_str theclass;
157 }
158
159 %{
160 /* YYSTYPE gets defined by %union */
161 static int parse_number (struct parser_state *par_state,
162 const char *, int, int, YYSTYPE *);
163 static struct stoken operator_stoken (const char *);
164 static struct stoken typename_stoken (const char *);
165 static void check_parameter_typelist (std::vector<struct type *> *);
166 static void write_destructor_name (struct parser_state *par_state,
167 struct stoken);
168
169 #ifdef YYBISON
170 static void c_print_token (FILE *file, int type, YYSTYPE value);
171 #define YYPRINT(FILE, TYPE, VALUE) c_print_token (FILE, TYPE, VALUE)
172 #endif
173 %}
174
175 %type <voidval> exp exp1 type_exp start variable qualified_name lcurly function_method
176 %type <lval> rcurly
177 %type <tval> type typebase
178 %type <tvec> nonempty_typelist func_mod parameter_typelist
179 /* %type <bval> block */
180
181 /* Fancy type parsing. */
182 %type <tval> ptype
183 %type <lval> array_mod
184 %type <tval> conversion_type_id
185
186 %type <type_stack> ptr_operator_ts abs_decl direct_abs_decl
187
188 %token <typed_val_int> INT
189 %token <typed_val_float> FLOAT
190
191 /* Both NAME and TYPENAME tokens represent symbols in the input,
192 and both convey their data as strings.
193 But a TYPENAME is a string that happens to be defined as a typedef
194 or builtin type name (such as int or char)
195 and a NAME is any other symbol.
196 Contexts where this distinction is not important can use the
197 nonterminal "name", which matches either NAME or TYPENAME. */
198
199 %token <tsval> STRING
200 %token <sval> NSSTRING /* ObjC Foundation "NSString" literal */
201 %token SELECTOR /* ObjC "@selector" pseudo-operator */
202 %token <tsval> CHAR
203 %token <ssym> NAME /* BLOCKNAME defined below to give it higher precedence. */
204 %token <ssym> UNKNOWN_CPP_NAME
205 %token <voidval> COMPLETE
206 %token <tsym> TYPENAME
207 %token <theclass> CLASSNAME /* ObjC Class name */
208 %type <sval> name field_name
209 %type <svec> string_exp
210 %type <ssym> name_not_typename
211 %type <tsym> type_name
212
213 /* This is like a '[' token, but is only generated when parsing
214 Objective C. This lets us reuse the same parser without
215 erroneously parsing ObjC-specific expressions in C. */
216 %token OBJC_LBRAC
217
218 /* A NAME_OR_INT is a symbol which is not known in the symbol table,
219 but which would parse as a valid number in the current input radix.
220 E.g. "c" when input_radix==16. Depending on the parse, it will be
221 turned into a name or into a number. */
222
223 %token <ssym> NAME_OR_INT
224
225 %token OPERATOR
226 %token STRUCT CLASS UNION ENUM SIZEOF ALIGNOF UNSIGNED COLONCOLON
227 %token TEMPLATE
228 %token ERROR
229 %token NEW DELETE
230 %type <sval> oper
231 %token REINTERPRET_CAST DYNAMIC_CAST STATIC_CAST CONST_CAST
232 %token ENTRY
233 %token TYPEOF
234 %token DECLTYPE
235 %token TYPEID
236
237 /* Special type cases, put in to allow the parser to distinguish different
238 legal basetypes. */
239 %token SIGNED_KEYWORD LONG SHORT INT_KEYWORD CONST_KEYWORD VOLATILE_KEYWORD DOUBLE_KEYWORD
240
241 %token <sval> DOLLAR_VARIABLE
242
243 %token <opcode> ASSIGN_MODIFY
244
245 /* C++ */
246 %token TRUEKEYWORD
247 %token FALSEKEYWORD
248
249
250 %left ','
251 %left ABOVE_COMMA
252 %right '=' ASSIGN_MODIFY
253 %right '?'
254 %left OROR
255 %left ANDAND
256 %left '|'
257 %left '^'
258 %left '&'
259 %left EQUAL NOTEQUAL
260 %left '<' '>' LEQ GEQ
261 %left LSH RSH
262 %left '@'
263 %left '+' '-'
264 %left '*' '/' '%'
265 %right UNARY INCREMENT DECREMENT
266 %right ARROW ARROW_STAR '.' DOT_STAR '[' OBJC_LBRAC '('
267 %token <ssym> BLOCKNAME
268 %token <bval> FILENAME
269 %type <bval> block
270 %left COLONCOLON
271
272 %token DOTDOTDOT
273
274 \f
275 %%
276
277 start : exp1
278 | type_exp
279 ;
280
281 type_exp: type
282 { write_exp_elt_opcode(pstate, OP_TYPE);
283 write_exp_elt_type(pstate, $1);
284 write_exp_elt_opcode(pstate, OP_TYPE);}
285 | TYPEOF '(' exp ')'
286 {
287 write_exp_elt_opcode (pstate, OP_TYPEOF);
288 }
289 | TYPEOF '(' type ')'
290 {
291 write_exp_elt_opcode (pstate, OP_TYPE);
292 write_exp_elt_type (pstate, $3);
293 write_exp_elt_opcode (pstate, OP_TYPE);
294 }
295 | DECLTYPE '(' exp ')'
296 {
297 write_exp_elt_opcode (pstate, OP_DECLTYPE);
298 }
299 ;
300
301 /* Expressions, including the comma operator. */
302 exp1 : exp
303 | exp1 ',' exp
304 { write_exp_elt_opcode (pstate, BINOP_COMMA); }
305 ;
306
307 /* Expressions, not including the comma operator. */
308 exp : '*' exp %prec UNARY
309 { write_exp_elt_opcode (pstate, UNOP_IND); }
310 ;
311
312 exp : '&' exp %prec UNARY
313 { write_exp_elt_opcode (pstate, UNOP_ADDR); }
314 ;
315
316 exp : '-' exp %prec UNARY
317 { write_exp_elt_opcode (pstate, UNOP_NEG); }
318 ;
319
320 exp : '+' exp %prec UNARY
321 { write_exp_elt_opcode (pstate, UNOP_PLUS); }
322 ;
323
324 exp : '!' exp %prec UNARY
325 { write_exp_elt_opcode (pstate, UNOP_LOGICAL_NOT); }
326 ;
327
328 exp : '~' exp %prec UNARY
329 { write_exp_elt_opcode (pstate, UNOP_COMPLEMENT); }
330 ;
331
332 exp : INCREMENT exp %prec UNARY
333 { write_exp_elt_opcode (pstate, UNOP_PREINCREMENT); }
334 ;
335
336 exp : DECREMENT exp %prec UNARY
337 { write_exp_elt_opcode (pstate, UNOP_PREDECREMENT); }
338 ;
339
340 exp : exp INCREMENT %prec UNARY
341 { write_exp_elt_opcode (pstate, UNOP_POSTINCREMENT); }
342 ;
343
344 exp : exp DECREMENT %prec UNARY
345 { write_exp_elt_opcode (pstate, UNOP_POSTDECREMENT); }
346 ;
347
348 exp : TYPEID '(' exp ')' %prec UNARY
349 { write_exp_elt_opcode (pstate, OP_TYPEID); }
350 ;
351
352 exp : TYPEID '(' type_exp ')' %prec UNARY
353 { write_exp_elt_opcode (pstate, OP_TYPEID); }
354 ;
355
356 exp : SIZEOF exp %prec UNARY
357 { write_exp_elt_opcode (pstate, UNOP_SIZEOF); }
358 ;
359
360 exp : ALIGNOF '(' type_exp ')' %prec UNARY
361 { write_exp_elt_opcode (pstate, UNOP_ALIGNOF); }
362 ;
363
364 exp : exp ARROW field_name
365 { write_exp_elt_opcode (pstate, STRUCTOP_PTR);
366 write_exp_string (pstate, $3);
367 write_exp_elt_opcode (pstate, STRUCTOP_PTR); }
368 ;
369
370 exp : exp ARROW field_name COMPLETE
371 { pstate->mark_struct_expression ();
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 COMPLETE
378 { struct stoken s;
379 pstate->mark_struct_expression ();
380 write_exp_elt_opcode (pstate, STRUCTOP_PTR);
381 s.ptr = "";
382 s.length = 0;
383 write_exp_string (pstate, s);
384 write_exp_elt_opcode (pstate, STRUCTOP_PTR); }
385 ;
386
387 exp : exp ARROW '~' name
388 { write_exp_elt_opcode (pstate, STRUCTOP_PTR);
389 write_destructor_name (pstate, $4);
390 write_exp_elt_opcode (pstate, STRUCTOP_PTR); }
391 ;
392
393 exp : exp ARROW '~' name COMPLETE
394 { pstate->mark_struct_expression ();
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 qualified_name
401 { /* exp->type::name becomes exp->*(&type::name) */
402 /* Note: this doesn't work if name is a
403 static member! FIXME */
404 write_exp_elt_opcode (pstate, UNOP_ADDR);
405 write_exp_elt_opcode (pstate, STRUCTOP_MPTR); }
406 ;
407
408 exp : exp ARROW_STAR exp
409 { write_exp_elt_opcode (pstate, STRUCTOP_MPTR); }
410 ;
411
412 exp : exp '.' field_name
413 { write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
414 write_exp_string (pstate, $3);
415 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
416 ;
417
418 exp : exp '.' field_name COMPLETE
419 { pstate->mark_struct_expression ();
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 '.' COMPLETE
426 { struct stoken s;
427 pstate->mark_struct_expression ();
428 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
429 s.ptr = "";
430 s.length = 0;
431 write_exp_string (pstate, s);
432 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
433 ;
434
435 exp : exp '.' '~' name
436 { write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
437 write_destructor_name (pstate, $4);
438 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
439 ;
440
441 exp : exp '.' '~' name COMPLETE
442 { pstate->mark_struct_expression ();
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 '.' qualified_name
449 { /* exp.type::name becomes exp.*(&type::name) */
450 /* Note: this doesn't work if name is a
451 static member! FIXME */
452 write_exp_elt_opcode (pstate, UNOP_ADDR);
453 write_exp_elt_opcode (pstate, STRUCTOP_MEMBER); }
454 ;
455
456 exp : exp DOT_STAR exp
457 { write_exp_elt_opcode (pstate, STRUCTOP_MEMBER); }
458 ;
459
460 exp : exp '[' exp1 ']'
461 { write_exp_elt_opcode (pstate, BINOP_SUBSCRIPT); }
462 ;
463
464 exp : exp OBJC_LBRAC exp1 ']'
465 { write_exp_elt_opcode (pstate, BINOP_SUBSCRIPT); }
466 ;
467
468 /*
469 * The rules below parse ObjC message calls of the form:
470 * '[' target selector {':' argument}* ']'
471 */
472
473 exp : OBJC_LBRAC TYPENAME
474 {
475 CORE_ADDR theclass;
476
477 std::string copy = copy_name ($2.stoken);
478 theclass = lookup_objc_class (pstate->gdbarch (),
479 copy.c_str ());
480 if (theclass == 0)
481 error (_("%s is not an ObjC Class"),
482 copy.c_str ());
483 write_exp_elt_opcode (pstate, OP_LONG);
484 write_exp_elt_type (pstate,
485 parse_type (pstate)->builtin_int);
486 write_exp_elt_longcst (pstate, (LONGEST) theclass);
487 write_exp_elt_opcode (pstate, OP_LONG);
488 start_msglist();
489 }
490 msglist ']'
491 { write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
492 end_msglist (pstate);
493 write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
494 }
495 ;
496
497 exp : OBJC_LBRAC CLASSNAME
498 {
499 write_exp_elt_opcode (pstate, OP_LONG);
500 write_exp_elt_type (pstate,
501 parse_type (pstate)->builtin_int);
502 write_exp_elt_longcst (pstate, (LONGEST) $2.theclass);
503 write_exp_elt_opcode (pstate, OP_LONG);
504 start_msglist();
505 }
506 msglist ']'
507 { write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
508 end_msglist (pstate);
509 write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
510 }
511 ;
512
513 exp : OBJC_LBRAC exp
514 { start_msglist(); }
515 msglist ']'
516 { write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
517 end_msglist (pstate);
518 write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
519 }
520 ;
521
522 msglist : name
523 { add_msglist(&$1, 0); }
524 | msgarglist
525 ;
526
527 msgarglist : msgarg
528 | msgarglist msgarg
529 ;
530
531 msgarg : name ':' exp
532 { add_msglist(&$1, 1); }
533 | ':' exp /* Unnamed arg. */
534 { add_msglist(0, 1); }
535 | ',' exp /* Variable number of args. */
536 { add_msglist(0, 0); }
537 ;
538
539 exp : exp '('
540 /* This is to save the value of arglist_len
541 being accumulated by an outer function call. */
542 { pstate->start_arglist (); }
543 arglist ')' %prec ARROW
544 { write_exp_elt_opcode (pstate, OP_FUNCALL);
545 write_exp_elt_longcst (pstate,
546 pstate->end_arglist ());
547 write_exp_elt_opcode (pstate, OP_FUNCALL); }
548 ;
549
550 /* This is here to disambiguate with the production for
551 "func()::static_var" further below, which uses
552 function_method_void. */
553 exp : exp '(' ')' %prec ARROW
554 { pstate->start_arglist ();
555 write_exp_elt_opcode (pstate, OP_FUNCALL);
556 write_exp_elt_longcst (pstate,
557 pstate->end_arglist ());
558 write_exp_elt_opcode (pstate, OP_FUNCALL); }
559 ;
560
561
562 exp : UNKNOWN_CPP_NAME '('
563 {
564 /* This could potentially be a an argument defined
565 lookup function (Koenig). */
566 write_exp_elt_opcode (pstate, OP_ADL_FUNC);
567 write_exp_elt_block
568 (pstate, pstate->expression_context_block);
569 write_exp_elt_sym (pstate,
570 NULL); /* Placeholder. */
571 write_exp_string (pstate, $1.stoken);
572 write_exp_elt_opcode (pstate, OP_ADL_FUNC);
573
574 /* This is to save the value of arglist_len
575 being accumulated by an outer function call. */
576
577 pstate->start_arglist ();
578 }
579 arglist ')' %prec ARROW
580 {
581 write_exp_elt_opcode (pstate, OP_FUNCALL);
582 write_exp_elt_longcst (pstate,
583 pstate->end_arglist ());
584 write_exp_elt_opcode (pstate, OP_FUNCALL);
585 }
586 ;
587
588 lcurly : '{'
589 { pstate->start_arglist (); }
590 ;
591
592 arglist :
593 ;
594
595 arglist : exp
596 { pstate->arglist_len = 1; }
597 ;
598
599 arglist : arglist ',' exp %prec ABOVE_COMMA
600 { pstate->arglist_len++; }
601 ;
602
603 function_method: exp '(' parameter_typelist ')' const_or_volatile
604 {
605 std::vector<struct type *> *type_list = $3;
606 LONGEST len = type_list->size ();
607
608 write_exp_elt_opcode (pstate, TYPE_INSTANCE);
609 /* Save the const/volatile qualifiers as
610 recorded by the const_or_volatile
611 production's actions. */
612 write_exp_elt_longcst
613 (pstate,
614 (cpstate->type_stack
615 .follow_type_instance_flags ()));
616 write_exp_elt_longcst (pstate, len);
617 for (type *type_elt : *type_list)
618 write_exp_elt_type (pstate, type_elt);
619 write_exp_elt_longcst(pstate, len);
620 write_exp_elt_opcode (pstate, TYPE_INSTANCE);
621 }
622 ;
623
624 function_method_void: exp '(' ')' const_or_volatile
625 { write_exp_elt_opcode (pstate, TYPE_INSTANCE);
626 /* See above. */
627 write_exp_elt_longcst
628 (pstate,
629 cpstate->type_stack.follow_type_instance_flags ());
630 write_exp_elt_longcst (pstate, 0);
631 write_exp_elt_longcst (pstate, 0);
632 write_exp_elt_opcode (pstate, TYPE_INSTANCE);
633 }
634 ;
635
636 exp : function_method
637 ;
638
639 /* Normally we must interpret "func()" as a function call, instead of
640 a type. The user needs to write func(void) to disambiguate.
641 However, in the "func()::static_var" case, there's no
642 ambiguity. */
643 function_method_void_or_typelist: function_method
644 | function_method_void
645 ;
646
647 exp : function_method_void_or_typelist COLONCOLON name
648 {
649 write_exp_elt_opcode (pstate, OP_FUNC_STATIC_VAR);
650 write_exp_string (pstate, $3);
651 write_exp_elt_opcode (pstate, OP_FUNC_STATIC_VAR);
652 }
653 ;
654
655 rcurly : '}'
656 { $$ = pstate->end_arglist () - 1; }
657 ;
658 exp : lcurly arglist rcurly %prec ARROW
659 { write_exp_elt_opcode (pstate, OP_ARRAY);
660 write_exp_elt_longcst (pstate, (LONGEST) 0);
661 write_exp_elt_longcst (pstate, (LONGEST) $3);
662 write_exp_elt_opcode (pstate, OP_ARRAY); }
663 ;
664
665 exp : lcurly type_exp rcurly exp %prec UNARY
666 { write_exp_elt_opcode (pstate, UNOP_MEMVAL_TYPE); }
667 ;
668
669 exp : '(' type_exp ')' exp %prec UNARY
670 { write_exp_elt_opcode (pstate, UNOP_CAST_TYPE); }
671 ;
672
673 exp : '(' exp1 ')'
674 { }
675 ;
676
677 /* Binary operators in order of decreasing precedence. */
678
679 exp : exp '@' exp
680 { write_exp_elt_opcode (pstate, BINOP_REPEAT); }
681 ;
682
683 exp : exp '*' exp
684 { write_exp_elt_opcode (pstate, BINOP_MUL); }
685 ;
686
687 exp : exp '/' exp
688 { write_exp_elt_opcode (pstate, BINOP_DIV); }
689 ;
690
691 exp : exp '%' exp
692 { write_exp_elt_opcode (pstate, BINOP_REM); }
693 ;
694
695 exp : exp '+' exp
696 { write_exp_elt_opcode (pstate, BINOP_ADD); }
697 ;
698
699 exp : exp '-' exp
700 { write_exp_elt_opcode (pstate, BINOP_SUB); }
701 ;
702
703 exp : exp LSH exp
704 { write_exp_elt_opcode (pstate, BINOP_LSH); }
705 ;
706
707 exp : exp RSH exp
708 { write_exp_elt_opcode (pstate, BINOP_RSH); }
709 ;
710
711 exp : exp EQUAL exp
712 { write_exp_elt_opcode (pstate, BINOP_EQUAL); }
713 ;
714
715 exp : exp NOTEQUAL exp
716 { write_exp_elt_opcode (pstate, BINOP_NOTEQUAL); }
717 ;
718
719 exp : exp LEQ exp
720 { write_exp_elt_opcode (pstate, BINOP_LEQ); }
721 ;
722
723 exp : exp GEQ exp
724 { write_exp_elt_opcode (pstate, BINOP_GEQ); }
725 ;
726
727 exp : exp '<' exp
728 { write_exp_elt_opcode (pstate, BINOP_LESS); }
729 ;
730
731 exp : exp '>' exp
732 { write_exp_elt_opcode (pstate, BINOP_GTR); }
733 ;
734
735 exp : exp '&' exp
736 { write_exp_elt_opcode (pstate, BINOP_BITWISE_AND); }
737 ;
738
739 exp : exp '^' exp
740 { write_exp_elt_opcode (pstate, BINOP_BITWISE_XOR); }
741 ;
742
743 exp : exp '|' exp
744 { write_exp_elt_opcode (pstate, BINOP_BITWISE_IOR); }
745 ;
746
747 exp : exp ANDAND exp
748 { write_exp_elt_opcode (pstate, BINOP_LOGICAL_AND); }
749 ;
750
751 exp : exp OROR exp
752 { write_exp_elt_opcode (pstate, BINOP_LOGICAL_OR); }
753 ;
754
755 exp : exp '?' exp ':' exp %prec '?'
756 { write_exp_elt_opcode (pstate, TERNOP_COND); }
757 ;
758
759 exp : exp '=' exp
760 { write_exp_elt_opcode (pstate, BINOP_ASSIGN); }
761 ;
762
763 exp : exp ASSIGN_MODIFY exp
764 { write_exp_elt_opcode (pstate, BINOP_ASSIGN_MODIFY);
765 write_exp_elt_opcode (pstate, $2);
766 write_exp_elt_opcode (pstate,
767 BINOP_ASSIGN_MODIFY); }
768 ;
769
770 exp : INT
771 { write_exp_elt_opcode (pstate, OP_LONG);
772 write_exp_elt_type (pstate, $1.type);
773 write_exp_elt_longcst (pstate, (LONGEST) ($1.val));
774 write_exp_elt_opcode (pstate, OP_LONG); }
775 ;
776
777 exp : CHAR
778 {
779 struct stoken_vector vec;
780 vec.len = 1;
781 vec.tokens = &$1;
782 write_exp_string_vector (pstate, $1.type, &vec);
783 }
784 ;
785
786 exp : NAME_OR_INT
787 { YYSTYPE val;
788 parse_number (pstate, $1.stoken.ptr,
789 $1.stoken.length, 0, &val);
790 write_exp_elt_opcode (pstate, OP_LONG);
791 write_exp_elt_type (pstate, val.typed_val_int.type);
792 write_exp_elt_longcst (pstate,
793 (LONGEST) val.typed_val_int.val);
794 write_exp_elt_opcode (pstate, OP_LONG);
795 }
796 ;
797
798
799 exp : FLOAT
800 { write_exp_elt_opcode (pstate, OP_FLOAT);
801 write_exp_elt_type (pstate, $1.type);
802 write_exp_elt_floatcst (pstate, $1.val);
803 write_exp_elt_opcode (pstate, OP_FLOAT); }
804 ;
805
806 exp : variable
807 ;
808
809 exp : DOLLAR_VARIABLE
810 {
811 write_dollar_variable (pstate, $1);
812 }
813 ;
814
815 exp : SELECTOR '(' name ')'
816 {
817 write_exp_elt_opcode (pstate, OP_OBJC_SELECTOR);
818 write_exp_string (pstate, $3);
819 write_exp_elt_opcode (pstate, OP_OBJC_SELECTOR); }
820 ;
821
822 exp : SIZEOF '(' type ')' %prec UNARY
823 { struct type *type = $3;
824 write_exp_elt_opcode (pstate, OP_LONG);
825 write_exp_elt_type (pstate, lookup_signed_typename
826 (pstate->language (),
827 pstate->gdbarch (),
828 "int"));
829 type = check_typedef (type);
830
831 /* $5.3.3/2 of the C++ Standard (n3290 draft)
832 says of sizeof: "When applied to a reference
833 or a reference type, the result is the size of
834 the referenced type." */
835 if (TYPE_IS_REFERENCE (type))
836 type = check_typedef (TYPE_TARGET_TYPE (type));
837 write_exp_elt_longcst (pstate,
838 (LONGEST) TYPE_LENGTH (type));
839 write_exp_elt_opcode (pstate, OP_LONG); }
840 ;
841
842 exp : REINTERPRET_CAST '<' type_exp '>' '(' exp ')' %prec UNARY
843 { write_exp_elt_opcode (pstate,
844 UNOP_REINTERPRET_CAST); }
845 ;
846
847 exp : STATIC_CAST '<' type_exp '>' '(' exp ')' %prec UNARY
848 { write_exp_elt_opcode (pstate, UNOP_CAST_TYPE); }
849 ;
850
851 exp : DYNAMIC_CAST '<' type_exp '>' '(' exp ')' %prec UNARY
852 { write_exp_elt_opcode (pstate, UNOP_DYNAMIC_CAST); }
853 ;
854
855 exp : CONST_CAST '<' type_exp '>' '(' exp ')' %prec UNARY
856 { /* We could do more error checking here, but
857 it doesn't seem worthwhile. */
858 write_exp_elt_opcode (pstate, UNOP_CAST_TYPE); }
859 ;
860
861 string_exp:
862 STRING
863 {
864 /* We copy the string here, and not in the
865 lexer, to guarantee that we do not leak a
866 string. Note that we follow the
867 NUL-termination convention of the
868 lexer. */
869 struct typed_stoken *vec = XNEW (struct typed_stoken);
870 $$.len = 1;
871 $$.tokens = vec;
872
873 vec->type = $1.type;
874 vec->length = $1.length;
875 vec->ptr = (char *) malloc ($1.length + 1);
876 memcpy (vec->ptr, $1.ptr, $1.length + 1);
877 }
878
879 | string_exp STRING
880 {
881 /* Note that we NUL-terminate here, but just
882 for convenience. */
883 char *p;
884 ++$$.len;
885 $$.tokens = XRESIZEVEC (struct typed_stoken,
886 $$.tokens, $$.len);
887
888 p = (char *) malloc ($2.length + 1);
889 memcpy (p, $2.ptr, $2.length + 1);
890
891 $$.tokens[$$.len - 1].type = $2.type;
892 $$.tokens[$$.len - 1].length = $2.length;
893 $$.tokens[$$.len - 1].ptr = p;
894 }
895 ;
896
897 exp : string_exp
898 {
899 int i;
900 c_string_type type = C_STRING;
901
902 for (i = 0; i < $1.len; ++i)
903 {
904 switch ($1.tokens[i].type)
905 {
906 case C_STRING:
907 break;
908 case C_WIDE_STRING:
909 case C_STRING_16:
910 case C_STRING_32:
911 if (type != C_STRING
912 && type != $1.tokens[i].type)
913 error (_("Undefined string concatenation."));
914 type = (enum c_string_type_values) $1.tokens[i].type;
915 break;
916 default:
917 /* internal error */
918 internal_error (__FILE__, __LINE__,
919 "unrecognized type in string concatenation");
920 }
921 }
922
923 write_exp_string_vector (pstate, type, &$1);
924 for (i = 0; i < $1.len; ++i)
925 free ($1.tokens[i].ptr);
926 free ($1.tokens);
927 }
928 ;
929
930 exp : NSSTRING /* ObjC NextStep NSString constant
931 * of the form '@' '"' string '"'.
932 */
933 { write_exp_elt_opcode (pstate, OP_OBJC_NSSTRING);
934 write_exp_string (pstate, $1);
935 write_exp_elt_opcode (pstate, OP_OBJC_NSSTRING); }
936 ;
937
938 /* C++. */
939 exp : TRUEKEYWORD
940 { write_exp_elt_opcode (pstate, OP_LONG);
941 write_exp_elt_type (pstate,
942 parse_type (pstate)->builtin_bool);
943 write_exp_elt_longcst (pstate, (LONGEST) 1);
944 write_exp_elt_opcode (pstate, OP_LONG); }
945 ;
946
947 exp : FALSEKEYWORD
948 { write_exp_elt_opcode (pstate, OP_LONG);
949 write_exp_elt_type (pstate,
950 parse_type (pstate)->builtin_bool);
951 write_exp_elt_longcst (pstate, (LONGEST) 0);
952 write_exp_elt_opcode (pstate, OP_LONG); }
953 ;
954
955 /* end of C++. */
956
957 block : BLOCKNAME
958 {
959 if ($1.sym.symbol)
960 $$ = SYMBOL_BLOCK_VALUE ($1.sym.symbol);
961 else
962 error (_("No file or function \"%s\"."),
963 copy_name ($1.stoken).c_str ());
964 }
965 | FILENAME
966 {
967 $$ = $1;
968 }
969 ;
970
971 block : block COLONCOLON name
972 {
973 std::string copy = copy_name ($3);
974 struct symbol *tem
975 = lookup_symbol (copy.c_str (), $1,
976 VAR_DOMAIN, NULL).symbol;
977
978 if (!tem || SYMBOL_CLASS (tem) != LOC_BLOCK)
979 error (_("No function \"%s\" in specified context."),
980 copy.c_str ());
981 $$ = SYMBOL_BLOCK_VALUE (tem); }
982 ;
983
984 variable: name_not_typename ENTRY
985 { struct symbol *sym = $1.sym.symbol;
986
987 if (sym == NULL || !SYMBOL_IS_ARGUMENT (sym)
988 || !symbol_read_needs_frame (sym))
989 error (_("@entry can be used only for function "
990 "parameters, not for \"%s\""),
991 copy_name ($1.stoken).c_str ());
992
993 write_exp_elt_opcode (pstate, OP_VAR_ENTRY_VALUE);
994 write_exp_elt_sym (pstate, sym);
995 write_exp_elt_opcode (pstate, OP_VAR_ENTRY_VALUE);
996 }
997 ;
998
999 variable: block COLONCOLON name
1000 {
1001 std::string copy = copy_name ($3);
1002 struct block_symbol sym
1003 = lookup_symbol (copy.c_str (), $1,
1004 VAR_DOMAIN, NULL);
1005
1006 if (sym.symbol == 0)
1007 error (_("No symbol \"%s\" in specified context."),
1008 copy.c_str ());
1009 if (symbol_read_needs_frame (sym.symbol))
1010 pstate->block_tracker->update (sym);
1011
1012 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1013 write_exp_elt_block (pstate, sym.block);
1014 write_exp_elt_sym (pstate, sym.symbol);
1015 write_exp_elt_opcode (pstate, OP_VAR_VALUE); }
1016 ;
1017
1018 qualified_name: TYPENAME COLONCOLON name
1019 {
1020 struct type *type = $1.type;
1021 type = check_typedef (type);
1022 if (!type_aggregate_p (type))
1023 error (_("`%s' is not defined as an aggregate type."),
1024 TYPE_SAFE_NAME (type));
1025
1026 write_exp_elt_opcode (pstate, OP_SCOPE);
1027 write_exp_elt_type (pstate, type);
1028 write_exp_string (pstate, $3);
1029 write_exp_elt_opcode (pstate, OP_SCOPE);
1030 }
1031 | TYPENAME COLONCOLON '~' name
1032 {
1033 struct type *type = $1.type;
1034 struct stoken tmp_token;
1035 char *buf;
1036
1037 type = check_typedef (type);
1038 if (!type_aggregate_p (type))
1039 error (_("`%s' is not defined as an aggregate type."),
1040 TYPE_SAFE_NAME (type));
1041 buf = (char *) alloca ($4.length + 2);
1042 tmp_token.ptr = buf;
1043 tmp_token.length = $4.length + 1;
1044 buf[0] = '~';
1045 memcpy (buf+1, $4.ptr, $4.length);
1046 buf[tmp_token.length] = 0;
1047
1048 /* Check for valid destructor name. */
1049 destructor_name_p (tmp_token.ptr, $1.type);
1050 write_exp_elt_opcode (pstate, OP_SCOPE);
1051 write_exp_elt_type (pstate, type);
1052 write_exp_string (pstate, tmp_token);
1053 write_exp_elt_opcode (pstate, OP_SCOPE);
1054 }
1055 | TYPENAME COLONCOLON name COLONCOLON name
1056 {
1057 std::string copy = copy_name ($3);
1058 error (_("No type \"%s\" within class "
1059 "or namespace \"%s\"."),
1060 copy.c_str (), TYPE_SAFE_NAME ($1.type));
1061 }
1062 ;
1063
1064 variable: qualified_name
1065 | COLONCOLON name_not_typename
1066 {
1067 std::string name = copy_name ($2.stoken);
1068 struct symbol *sym;
1069 struct bound_minimal_symbol msymbol;
1070
1071 sym
1072 = lookup_symbol (name.c_str (),
1073 (const struct block *) NULL,
1074 VAR_DOMAIN, NULL).symbol;
1075 if (sym)
1076 {
1077 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1078 write_exp_elt_block (pstate, NULL);
1079 write_exp_elt_sym (pstate, sym);
1080 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1081 break;
1082 }
1083
1084 msymbol = lookup_bound_minimal_symbol (name.c_str ());
1085 if (msymbol.minsym != NULL)
1086 write_exp_msymbol (pstate, msymbol);
1087 else if (!have_full_symbols () && !have_partial_symbols ())
1088 error (_("No symbol table is loaded. Use the \"file\" command."));
1089 else
1090 error (_("No symbol \"%s\" in current context."),
1091 name.c_str ());
1092 }
1093 ;
1094
1095 variable: name_not_typename
1096 { struct block_symbol sym = $1.sym;
1097
1098 if (sym.symbol)
1099 {
1100 if (symbol_read_needs_frame (sym.symbol))
1101 pstate->block_tracker->update (sym);
1102
1103 /* If we found a function, see if it's
1104 an ifunc resolver that has the same
1105 address as the ifunc symbol itself.
1106 If so, prefer the ifunc symbol. */
1107
1108 bound_minimal_symbol resolver
1109 = find_gnu_ifunc (sym.symbol);
1110 if (resolver.minsym != NULL)
1111 write_exp_msymbol (pstate, resolver);
1112 else
1113 {
1114 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1115 write_exp_elt_block (pstate, sym.block);
1116 write_exp_elt_sym (pstate, sym.symbol);
1117 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1118 }
1119 }
1120 else if ($1.is_a_field_of_this)
1121 {
1122 /* C++: it hangs off of `this'. Must
1123 not inadvertently convert from a method call
1124 to data ref. */
1125 pstate->block_tracker->update (sym);
1126 write_exp_elt_opcode (pstate, OP_THIS);
1127 write_exp_elt_opcode (pstate, OP_THIS);
1128 write_exp_elt_opcode (pstate, STRUCTOP_PTR);
1129 write_exp_string (pstate, $1.stoken);
1130 write_exp_elt_opcode (pstate, STRUCTOP_PTR);
1131 }
1132 else
1133 {
1134 std::string arg = copy_name ($1.stoken);
1135
1136 bound_minimal_symbol msymbol
1137 = lookup_bound_minimal_symbol (arg.c_str ());
1138 if (msymbol.minsym == NULL)
1139 {
1140 if (!have_full_symbols () && !have_partial_symbols ())
1141 error (_("No symbol table is loaded. Use the \"file\" command."));
1142 else
1143 error (_("No symbol \"%s\" in current context."),
1144 arg.c_str ());
1145 }
1146
1147 /* This minsym might be an alias for
1148 another function. See if we can find
1149 the debug symbol for the target, and
1150 if so, use it instead, since it has
1151 return type / prototype info. This
1152 is important for example for "p
1153 *__errno_location()". */
1154 symbol *alias_target
1155 = ((msymbol.minsym->type != mst_text_gnu_ifunc
1156 && msymbol.minsym->type != mst_data_gnu_ifunc)
1157 ? find_function_alias_target (msymbol)
1158 : NULL);
1159 if (alias_target != NULL)
1160 {
1161 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1162 write_exp_elt_block
1163 (pstate, SYMBOL_BLOCK_VALUE (alias_target));
1164 write_exp_elt_sym (pstate, alias_target);
1165 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1166 }
1167 else
1168 write_exp_msymbol (pstate, msymbol);
1169 }
1170 }
1171 ;
1172
1173 space_identifier : '@' NAME
1174 {
1175 cpstate->type_stack.insert (pstate,
1176 copy_name ($2.stoken).c_str ());
1177 }
1178 ;
1179
1180 const_or_volatile: const_or_volatile_noopt
1181 |
1182 ;
1183
1184 cv_with_space_id : const_or_volatile space_identifier const_or_volatile
1185 ;
1186
1187 const_or_volatile_or_space_identifier_noopt: cv_with_space_id
1188 | const_or_volatile_noopt
1189 ;
1190
1191 const_or_volatile_or_space_identifier:
1192 const_or_volatile_or_space_identifier_noopt
1193 |
1194 ;
1195
1196 ptr_operator:
1197 ptr_operator '*'
1198 { cpstate->type_stack.insert (tp_pointer); }
1199 const_or_volatile_or_space_identifier
1200 | '*'
1201 { cpstate->type_stack.insert (tp_pointer); }
1202 const_or_volatile_or_space_identifier
1203 | '&'
1204 { cpstate->type_stack.insert (tp_reference); }
1205 | '&' ptr_operator
1206 { cpstate->type_stack.insert (tp_reference); }
1207 | ANDAND
1208 { cpstate->type_stack.insert (tp_rvalue_reference); }
1209 | ANDAND ptr_operator
1210 { cpstate->type_stack.insert (tp_rvalue_reference); }
1211 ;
1212
1213 ptr_operator_ts: ptr_operator
1214 {
1215 $$ = cpstate->type_stack.create ();
1216 cpstate->type_stacks.emplace_back ($$);
1217 }
1218 ;
1219
1220 abs_decl: ptr_operator_ts direct_abs_decl
1221 { $$ = $2->append ($1); }
1222 | ptr_operator_ts
1223 | direct_abs_decl
1224 ;
1225
1226 direct_abs_decl: '(' abs_decl ')'
1227 { $$ = $2; }
1228 | direct_abs_decl array_mod
1229 {
1230 cpstate->type_stack.push ($1);
1231 cpstate->type_stack.push ($2);
1232 cpstate->type_stack.push (tp_array);
1233 $$ = cpstate->type_stack.create ();
1234 cpstate->type_stacks.emplace_back ($$);
1235 }
1236 | array_mod
1237 {
1238 cpstate->type_stack.push ($1);
1239 cpstate->type_stack.push (tp_array);
1240 $$ = cpstate->type_stack.create ();
1241 cpstate->type_stacks.emplace_back ($$);
1242 }
1243
1244 | direct_abs_decl func_mod
1245 {
1246 cpstate->type_stack.push ($1);
1247 cpstate->type_stack.push ($2);
1248 $$ = cpstate->type_stack.create ();
1249 cpstate->type_stacks.emplace_back ($$);
1250 }
1251 | func_mod
1252 {
1253 cpstate->type_stack.push ($1);
1254 $$ = cpstate->type_stack.create ();
1255 cpstate->type_stacks.emplace_back ($$);
1256 }
1257 ;
1258
1259 array_mod: '[' ']'
1260 { $$ = -1; }
1261 | OBJC_LBRAC ']'
1262 { $$ = -1; }
1263 | '[' INT ']'
1264 { $$ = $2.val; }
1265 | OBJC_LBRAC INT ']'
1266 { $$ = $2.val; }
1267 ;
1268
1269 func_mod: '(' ')'
1270 {
1271 $$ = new std::vector<struct type *>;
1272 cpstate->type_lists.emplace_back ($$);
1273 }
1274 | '(' parameter_typelist ')'
1275 { $$ = $2; }
1276 ;
1277
1278 /* We used to try to recognize pointer to member types here, but
1279 that didn't work (shift/reduce conflicts meant that these rules never
1280 got executed). The problem is that
1281 int (foo::bar::baz::bizzle)
1282 is a function type but
1283 int (foo::bar::baz::bizzle::*)
1284 is a pointer to member type. Stroustrup loses again! */
1285
1286 type : ptype
1287 ;
1288
1289 /* Implements (approximately): (type-qualifier)* type-specifier.
1290
1291 When type-specifier is only ever a single word, like 'float' then these
1292 arrive as pre-built TYPENAME tokens thanks to the classify_name
1293 function. However, when a type-specifier can contain multiple words,
1294 for example 'double' can appear as just 'double' or 'long double', and
1295 similarly 'long' can appear as just 'long' or in 'long double', then
1296 these type-specifiers are parsed into their own tokens in the function
1297 lex_one_token and the ident_tokens array. These separate tokens are all
1298 recognised here. */
1299 typebase
1300 : TYPENAME
1301 { $$ = $1.type; }
1302 | INT_KEYWORD
1303 { $$ = lookup_signed_typename (pstate->language (),
1304 pstate->gdbarch (),
1305 "int"); }
1306 | LONG
1307 { $$ = lookup_signed_typename (pstate->language (),
1308 pstate->gdbarch (),
1309 "long"); }
1310 | SHORT
1311 { $$ = lookup_signed_typename (pstate->language (),
1312 pstate->gdbarch (),
1313 "short"); }
1314 | LONG INT_KEYWORD
1315 { $$ = lookup_signed_typename (pstate->language (),
1316 pstate->gdbarch (),
1317 "long"); }
1318 | LONG SIGNED_KEYWORD INT_KEYWORD
1319 { $$ = lookup_signed_typename (pstate->language (),
1320 pstate->gdbarch (),
1321 "long"); }
1322 | LONG SIGNED_KEYWORD
1323 { $$ = lookup_signed_typename (pstate->language (),
1324 pstate->gdbarch (),
1325 "long"); }
1326 | SIGNED_KEYWORD LONG INT_KEYWORD
1327 { $$ = lookup_signed_typename (pstate->language (),
1328 pstate->gdbarch (),
1329 "long"); }
1330 | UNSIGNED LONG INT_KEYWORD
1331 { $$ = lookup_unsigned_typename (pstate->language (),
1332 pstate->gdbarch (),
1333 "long"); }
1334 | LONG UNSIGNED INT_KEYWORD
1335 { $$ = lookup_unsigned_typename (pstate->language (),
1336 pstate->gdbarch (),
1337 "long"); }
1338 | LONG UNSIGNED
1339 { $$ = lookup_unsigned_typename (pstate->language (),
1340 pstate->gdbarch (),
1341 "long"); }
1342 | LONG LONG
1343 { $$ = lookup_signed_typename (pstate->language (),
1344 pstate->gdbarch (),
1345 "long long"); }
1346 | LONG LONG INT_KEYWORD
1347 { $$ = lookup_signed_typename (pstate->language (),
1348 pstate->gdbarch (),
1349 "long long"); }
1350 | LONG LONG SIGNED_KEYWORD INT_KEYWORD
1351 { $$ = lookup_signed_typename (pstate->language (),
1352 pstate->gdbarch (),
1353 "long long"); }
1354 | LONG LONG SIGNED_KEYWORD
1355 { $$ = lookup_signed_typename (pstate->language (),
1356 pstate->gdbarch (),
1357 "long long"); }
1358 | SIGNED_KEYWORD LONG LONG
1359 { $$ = lookup_signed_typename (pstate->language (),
1360 pstate->gdbarch (),
1361 "long long"); }
1362 | SIGNED_KEYWORD LONG LONG INT_KEYWORD
1363 { $$ = lookup_signed_typename (pstate->language (),
1364 pstate->gdbarch (),
1365 "long long"); }
1366 | UNSIGNED LONG LONG
1367 { $$ = lookup_unsigned_typename (pstate->language (),
1368 pstate->gdbarch (),
1369 "long long"); }
1370 | UNSIGNED LONG LONG INT_KEYWORD
1371 { $$ = lookup_unsigned_typename (pstate->language (),
1372 pstate->gdbarch (),
1373 "long long"); }
1374 | LONG LONG UNSIGNED
1375 { $$ = lookup_unsigned_typename (pstate->language (),
1376 pstate->gdbarch (),
1377 "long long"); }
1378 | LONG LONG UNSIGNED INT_KEYWORD
1379 { $$ = lookup_unsigned_typename (pstate->language (),
1380 pstate->gdbarch (),
1381 "long long"); }
1382 | SHORT INT_KEYWORD
1383 { $$ = lookup_signed_typename (pstate->language (),
1384 pstate->gdbarch (),
1385 "short"); }
1386 | SHORT SIGNED_KEYWORD INT_KEYWORD
1387 { $$ = lookup_signed_typename (pstate->language (),
1388 pstate->gdbarch (),
1389 "short"); }
1390 | SHORT SIGNED_KEYWORD
1391 { $$ = lookup_signed_typename (pstate->language (),
1392 pstate->gdbarch (),
1393 "short"); }
1394 | UNSIGNED SHORT INT_KEYWORD
1395 { $$ = lookup_unsigned_typename (pstate->language (),
1396 pstate->gdbarch (),
1397 "short"); }
1398 | SHORT UNSIGNED
1399 { $$ = lookup_unsigned_typename (pstate->language (),
1400 pstate->gdbarch (),
1401 "short"); }
1402 | SHORT UNSIGNED INT_KEYWORD
1403 { $$ = lookup_unsigned_typename (pstate->language (),
1404 pstate->gdbarch (),
1405 "short"); }
1406 | DOUBLE_KEYWORD
1407 { $$ = lookup_typename (pstate->language (),
1408 pstate->gdbarch (),
1409 "double",
1410 NULL,
1411 0); }
1412 | LONG DOUBLE_KEYWORD
1413 { $$ = lookup_typename (pstate->language (),
1414 pstate->gdbarch (),
1415 "long double",
1416 NULL,
1417 0); }
1418 | STRUCT name
1419 { $$
1420 = lookup_struct (copy_name ($2).c_str (),
1421 pstate->expression_context_block);
1422 }
1423 | STRUCT COMPLETE
1424 {
1425 pstate->mark_completion_tag (TYPE_CODE_STRUCT,
1426 "", 0);
1427 $$ = NULL;
1428 }
1429 | STRUCT name COMPLETE
1430 {
1431 pstate->mark_completion_tag (TYPE_CODE_STRUCT,
1432 $2.ptr, $2.length);
1433 $$ = NULL;
1434 }
1435 | CLASS name
1436 { $$ = lookup_struct
1437 (copy_name ($2).c_str (),
1438 pstate->expression_context_block);
1439 }
1440 | CLASS COMPLETE
1441 {
1442 pstate->mark_completion_tag (TYPE_CODE_STRUCT,
1443 "", 0);
1444 $$ = NULL;
1445 }
1446 | CLASS name COMPLETE
1447 {
1448 pstate->mark_completion_tag (TYPE_CODE_STRUCT,
1449 $2.ptr, $2.length);
1450 $$ = NULL;
1451 }
1452 | UNION name
1453 { $$
1454 = lookup_union (copy_name ($2).c_str (),
1455 pstate->expression_context_block);
1456 }
1457 | UNION COMPLETE
1458 {
1459 pstate->mark_completion_tag (TYPE_CODE_UNION,
1460 "", 0);
1461 $$ = NULL;
1462 }
1463 | UNION name COMPLETE
1464 {
1465 pstate->mark_completion_tag (TYPE_CODE_UNION,
1466 $2.ptr, $2.length);
1467 $$ = NULL;
1468 }
1469 | ENUM name
1470 { $$ = lookup_enum (copy_name ($2).c_str (),
1471 pstate->expression_context_block);
1472 }
1473 | ENUM COMPLETE
1474 {
1475 pstate->mark_completion_tag (TYPE_CODE_ENUM, "", 0);
1476 $$ = NULL;
1477 }
1478 | ENUM name COMPLETE
1479 {
1480 pstate->mark_completion_tag (TYPE_CODE_ENUM, $2.ptr,
1481 $2.length);
1482 $$ = NULL;
1483 }
1484 | UNSIGNED type_name
1485 { $$ = lookup_unsigned_typename (pstate->language (),
1486 pstate->gdbarch (),
1487 TYPE_NAME($2.type)); }
1488 | UNSIGNED
1489 { $$ = lookup_unsigned_typename (pstate->language (),
1490 pstate->gdbarch (),
1491 "int"); }
1492 | SIGNED_KEYWORD type_name
1493 { $$ = lookup_signed_typename (pstate->language (),
1494 pstate->gdbarch (),
1495 TYPE_NAME($2.type)); }
1496 | SIGNED_KEYWORD
1497 { $$ = lookup_signed_typename (pstate->language (),
1498 pstate->gdbarch (),
1499 "int"); }
1500 /* It appears that this rule for templates is never
1501 reduced; template recognition happens by lookahead
1502 in the token processing code in yylex. */
1503 | TEMPLATE name '<' type '>'
1504 { $$ = lookup_template_type
1505 (copy_name($2).c_str (), $4,
1506 pstate->expression_context_block);
1507 }
1508 | const_or_volatile_or_space_identifier_noopt typebase
1509 { $$ = cpstate->type_stack.follow_types ($2); }
1510 | typebase const_or_volatile_or_space_identifier_noopt
1511 { $$ = cpstate->type_stack.follow_types ($1); }
1512 ;
1513
1514 type_name: TYPENAME
1515 | INT_KEYWORD
1516 {
1517 $$.stoken.ptr = "int";
1518 $$.stoken.length = 3;
1519 $$.type = lookup_signed_typename (pstate->language (),
1520 pstate->gdbarch (),
1521 "int");
1522 }
1523 | LONG
1524 {
1525 $$.stoken.ptr = "long";
1526 $$.stoken.length = 4;
1527 $$.type = lookup_signed_typename (pstate->language (),
1528 pstate->gdbarch (),
1529 "long");
1530 }
1531 | SHORT
1532 {
1533 $$.stoken.ptr = "short";
1534 $$.stoken.length = 5;
1535 $$.type = lookup_signed_typename (pstate->language (),
1536 pstate->gdbarch (),
1537 "short");
1538 }
1539 ;
1540
1541 parameter_typelist:
1542 nonempty_typelist
1543 { check_parameter_typelist ($1); }
1544 | nonempty_typelist ',' DOTDOTDOT
1545 {
1546 $1->push_back (NULL);
1547 check_parameter_typelist ($1);
1548 $$ = $1;
1549 }
1550 ;
1551
1552 nonempty_typelist
1553 : type
1554 {
1555 std::vector<struct type *> *typelist
1556 = new std::vector<struct type *>;
1557 cpstate->type_lists.emplace_back (typelist);
1558
1559 typelist->push_back ($1);
1560 $$ = typelist;
1561 }
1562 | nonempty_typelist ',' type
1563 {
1564 $1->push_back ($3);
1565 $$ = $1;
1566 }
1567 ;
1568
1569 ptype : typebase
1570 | ptype abs_decl
1571 {
1572 cpstate->type_stack.push ($2);
1573 $$ = cpstate->type_stack.follow_types ($1);
1574 }
1575 ;
1576
1577 conversion_type_id: typebase conversion_declarator
1578 { $$ = cpstate->type_stack.follow_types ($1); }
1579 ;
1580
1581 conversion_declarator: /* Nothing. */
1582 | ptr_operator conversion_declarator
1583 ;
1584
1585 const_and_volatile: CONST_KEYWORD VOLATILE_KEYWORD
1586 | VOLATILE_KEYWORD CONST_KEYWORD
1587 ;
1588
1589 const_or_volatile_noopt: const_and_volatile
1590 { cpstate->type_stack.insert (tp_const);
1591 cpstate->type_stack.insert (tp_volatile);
1592 }
1593 | CONST_KEYWORD
1594 { cpstate->type_stack.insert (tp_const); }
1595 | VOLATILE_KEYWORD
1596 { cpstate->type_stack.insert (tp_volatile); }
1597 ;
1598
1599 oper: OPERATOR NEW
1600 { $$ = operator_stoken (" new"); }
1601 | OPERATOR DELETE
1602 { $$ = operator_stoken (" delete"); }
1603 | OPERATOR NEW '[' ']'
1604 { $$ = operator_stoken (" new[]"); }
1605 | OPERATOR DELETE '[' ']'
1606 { $$ = operator_stoken (" delete[]"); }
1607 | OPERATOR NEW OBJC_LBRAC ']'
1608 { $$ = operator_stoken (" new[]"); }
1609 | OPERATOR DELETE OBJC_LBRAC ']'
1610 { $$ = operator_stoken (" delete[]"); }
1611 | OPERATOR '+'
1612 { $$ = operator_stoken ("+"); }
1613 | OPERATOR '-'
1614 { $$ = operator_stoken ("-"); }
1615 | OPERATOR '*'
1616 { $$ = operator_stoken ("*"); }
1617 | OPERATOR '/'
1618 { $$ = operator_stoken ("/"); }
1619 | OPERATOR '%'
1620 { $$ = operator_stoken ("%"); }
1621 | OPERATOR '^'
1622 { $$ = operator_stoken ("^"); }
1623 | OPERATOR '&'
1624 { $$ = operator_stoken ("&"); }
1625 | OPERATOR '|'
1626 { $$ = operator_stoken ("|"); }
1627 | OPERATOR '~'
1628 { $$ = operator_stoken ("~"); }
1629 | OPERATOR '!'
1630 { $$ = operator_stoken ("!"); }
1631 | OPERATOR '='
1632 { $$ = operator_stoken ("="); }
1633 | OPERATOR '<'
1634 { $$ = operator_stoken ("<"); }
1635 | OPERATOR '>'
1636 { $$ = operator_stoken (">"); }
1637 | OPERATOR ASSIGN_MODIFY
1638 { const char *op = " unknown";
1639 switch ($2)
1640 {
1641 case BINOP_RSH:
1642 op = ">>=";
1643 break;
1644 case BINOP_LSH:
1645 op = "<<=";
1646 break;
1647 case BINOP_ADD:
1648 op = "+=";
1649 break;
1650 case BINOP_SUB:
1651 op = "-=";
1652 break;
1653 case BINOP_MUL:
1654 op = "*=";
1655 break;
1656 case BINOP_DIV:
1657 op = "/=";
1658 break;
1659 case BINOP_REM:
1660 op = "%=";
1661 break;
1662 case BINOP_BITWISE_IOR:
1663 op = "|=";
1664 break;
1665 case BINOP_BITWISE_AND:
1666 op = "&=";
1667 break;
1668 case BINOP_BITWISE_XOR:
1669 op = "^=";
1670 break;
1671 default:
1672 break;
1673 }
1674
1675 $$ = operator_stoken (op);
1676 }
1677 | OPERATOR LSH
1678 { $$ = operator_stoken ("<<"); }
1679 | OPERATOR RSH
1680 { $$ = operator_stoken (">>"); }
1681 | OPERATOR EQUAL
1682 { $$ = operator_stoken ("=="); }
1683 | OPERATOR NOTEQUAL
1684 { $$ = operator_stoken ("!="); }
1685 | OPERATOR LEQ
1686 { $$ = operator_stoken ("<="); }
1687 | OPERATOR GEQ
1688 { $$ = operator_stoken (">="); }
1689 | OPERATOR ANDAND
1690 { $$ = operator_stoken ("&&"); }
1691 | OPERATOR OROR
1692 { $$ = operator_stoken ("||"); }
1693 | OPERATOR INCREMENT
1694 { $$ = operator_stoken ("++"); }
1695 | OPERATOR DECREMENT
1696 { $$ = operator_stoken ("--"); }
1697 | OPERATOR ','
1698 { $$ = operator_stoken (","); }
1699 | OPERATOR ARROW_STAR
1700 { $$ = operator_stoken ("->*"); }
1701 | OPERATOR ARROW
1702 { $$ = operator_stoken ("->"); }
1703 | OPERATOR '(' ')'
1704 { $$ = operator_stoken ("()"); }
1705 | OPERATOR '[' ']'
1706 { $$ = operator_stoken ("[]"); }
1707 | OPERATOR OBJC_LBRAC ']'
1708 { $$ = operator_stoken ("[]"); }
1709 | OPERATOR conversion_type_id
1710 { string_file buf;
1711
1712 c_print_type ($2, NULL, &buf, -1, 0,
1713 &type_print_raw_options);
1714
1715 /* This also needs canonicalization. */
1716 std::string canon
1717 = cp_canonicalize_string (buf.c_str ());
1718 if (canon.empty ())
1719 canon = std::move (buf.string ());
1720 $$ = operator_stoken ((" " + canon).c_str ());
1721 }
1722 ;
1723
1724 /* This rule exists in order to allow some tokens that would not normally
1725 match the 'name' rule to appear as fields within a struct. The example
1726 that initially motivated this was the RISC-V target which models the
1727 floating point registers as a union with fields called 'float' and
1728 'double'. The 'float' string becomes a TYPENAME token and can appear
1729 anywhere a 'name' can, however 'double' is its own token,
1730 DOUBLE_KEYWORD, and doesn't match the 'name' rule.*/
1731 field_name
1732 : name
1733 | DOUBLE_KEYWORD { $$ = typename_stoken ("double"); }
1734 | INT_KEYWORD { $$ = typename_stoken ("int"); }
1735 | LONG { $$ = typename_stoken ("long"); }
1736 | SHORT { $$ = typename_stoken ("short"); }
1737 | SIGNED_KEYWORD { $$ = typename_stoken ("signed"); }
1738 | UNSIGNED { $$ = typename_stoken ("unsigned"); }
1739 ;
1740
1741 name : NAME { $$ = $1.stoken; }
1742 | BLOCKNAME { $$ = $1.stoken; }
1743 | TYPENAME { $$ = $1.stoken; }
1744 | NAME_OR_INT { $$ = $1.stoken; }
1745 | UNKNOWN_CPP_NAME { $$ = $1.stoken; }
1746 | oper { $$ = $1; }
1747 ;
1748
1749 name_not_typename : NAME
1750 | BLOCKNAME
1751 /* These would be useful if name_not_typename was useful, but it is just
1752 a fake for "variable", so these cause reduce/reduce conflicts because
1753 the parser can't tell whether NAME_OR_INT is a name_not_typename (=variable,
1754 =exp) or just an exp. If name_not_typename was ever used in an lvalue
1755 context where only a name could occur, this might be useful.
1756 | NAME_OR_INT
1757 */
1758 | oper
1759 {
1760 struct field_of_this_result is_a_field_of_this;
1761
1762 $$.stoken = $1;
1763 $$.sym
1764 = lookup_symbol ($1.ptr,
1765 pstate->expression_context_block,
1766 VAR_DOMAIN,
1767 &is_a_field_of_this);
1768 $$.is_a_field_of_this
1769 = is_a_field_of_this.type != NULL;
1770 }
1771 | UNKNOWN_CPP_NAME
1772 ;
1773
1774 %%
1775
1776 /* Like write_exp_string, but prepends a '~'. */
1777
1778 static void
1779 write_destructor_name (struct parser_state *par_state, struct stoken token)
1780 {
1781 char *copy = (char *) alloca (token.length + 1);
1782
1783 copy[0] = '~';
1784 memcpy (&copy[1], token.ptr, token.length);
1785
1786 token.ptr = copy;
1787 ++token.length;
1788
1789 write_exp_string (par_state, token);
1790 }
1791
1792 /* Returns a stoken of the operator name given by OP (which does not
1793 include the string "operator"). */
1794
1795 static struct stoken
1796 operator_stoken (const char *op)
1797 {
1798 struct stoken st = { NULL, 0 };
1799 char *buf;
1800
1801 st.length = CP_OPERATOR_LEN + strlen (op);
1802 buf = (char *) malloc (st.length + 1);
1803 strcpy (buf, CP_OPERATOR_STR);
1804 strcat (buf, op);
1805 st.ptr = buf;
1806
1807 /* The toplevel (c_parse) will free the memory allocated here. */
1808 cpstate->strings.emplace_back (buf);
1809 return st;
1810 };
1811
1812 /* Returns a stoken of the type named TYPE. */
1813
1814 static struct stoken
1815 typename_stoken (const char *type)
1816 {
1817 struct stoken st = { type, 0 };
1818 st.length = strlen (type);
1819 return st;
1820 };
1821
1822 /* Return true if the type is aggregate-like. */
1823
1824 static int
1825 type_aggregate_p (struct type *type)
1826 {
1827 return (TYPE_CODE (type) == TYPE_CODE_STRUCT
1828 || TYPE_CODE (type) == TYPE_CODE_UNION
1829 || TYPE_CODE (type) == TYPE_CODE_NAMESPACE
1830 || (TYPE_CODE (type) == TYPE_CODE_ENUM
1831 && TYPE_DECLARED_CLASS (type)));
1832 }
1833
1834 /* Validate a parameter typelist. */
1835
1836 static void
1837 check_parameter_typelist (std::vector<struct type *> *params)
1838 {
1839 struct type *type;
1840 int ix;
1841
1842 for (ix = 0; ix < params->size (); ++ix)
1843 {
1844 type = (*params)[ix];
1845 if (type != NULL && TYPE_CODE (check_typedef (type)) == TYPE_CODE_VOID)
1846 {
1847 if (ix == 0)
1848 {
1849 if (params->size () == 1)
1850 {
1851 /* Ok. */
1852 break;
1853 }
1854 error (_("parameter types following 'void'"));
1855 }
1856 else
1857 error (_("'void' invalid as parameter type"));
1858 }
1859 }
1860 }
1861
1862 /* Take care of parsing a number (anything that starts with a digit).
1863 Set yylval and return the token type; update lexptr.
1864 LEN is the number of characters in it. */
1865
1866 /*** Needs some error checking for the float case ***/
1867
1868 static int
1869 parse_number (struct parser_state *par_state,
1870 const char *buf, int len, int parsed_float, YYSTYPE *putithere)
1871 {
1872 ULONGEST n = 0;
1873 ULONGEST prevn = 0;
1874 ULONGEST un;
1875
1876 int i = 0;
1877 int c;
1878 int base = input_radix;
1879 int unsigned_p = 0;
1880
1881 /* Number of "L" suffixes encountered. */
1882 int long_p = 0;
1883
1884 /* We have found a "L" or "U" suffix. */
1885 int found_suffix = 0;
1886
1887 ULONGEST high_bit;
1888 struct type *signed_type;
1889 struct type *unsigned_type;
1890 char *p;
1891
1892 p = (char *) alloca (len);
1893 memcpy (p, buf, len);
1894
1895 if (parsed_float)
1896 {
1897 /* Handle suffixes for decimal floating-point: "df", "dd" or "dl". */
1898 if (len >= 2 && p[len - 2] == 'd' && p[len - 1] == 'f')
1899 {
1900 putithere->typed_val_float.type
1901 = parse_type (par_state)->builtin_decfloat;
1902 len -= 2;
1903 }
1904 else if (len >= 2 && p[len - 2] == 'd' && p[len - 1] == 'd')
1905 {
1906 putithere->typed_val_float.type
1907 = parse_type (par_state)->builtin_decdouble;
1908 len -= 2;
1909 }
1910 else if (len >= 2 && p[len - 2] == 'd' && p[len - 1] == 'l')
1911 {
1912 putithere->typed_val_float.type
1913 = parse_type (par_state)->builtin_declong;
1914 len -= 2;
1915 }
1916 /* Handle suffixes: 'f' for float, 'l' for long double. */
1917 else if (len >= 1 && TOLOWER (p[len - 1]) == 'f')
1918 {
1919 putithere->typed_val_float.type
1920 = parse_type (par_state)->builtin_float;
1921 len -= 1;
1922 }
1923 else if (len >= 1 && TOLOWER (p[len - 1]) == 'l')
1924 {
1925 putithere->typed_val_float.type
1926 = parse_type (par_state)->builtin_long_double;
1927 len -= 1;
1928 }
1929 /* Default type for floating-point literals is double. */
1930 else
1931 {
1932 putithere->typed_val_float.type
1933 = parse_type (par_state)->builtin_double;
1934 }
1935
1936 if (!parse_float (p, len,
1937 putithere->typed_val_float.type,
1938 putithere->typed_val_float.val))
1939 return ERROR;
1940 return FLOAT;
1941 }
1942
1943 /* Handle base-switching prefixes 0x, 0t, 0d, 0 */
1944 if (p[0] == '0' && len > 1)
1945 switch (p[1])
1946 {
1947 case 'x':
1948 case 'X':
1949 if (len >= 3)
1950 {
1951 p += 2;
1952 base = 16;
1953 len -= 2;
1954 }
1955 break;
1956
1957 case 'b':
1958 case 'B':
1959 if (len >= 3)
1960 {
1961 p += 2;
1962 base = 2;
1963 len -= 2;
1964 }
1965 break;
1966
1967 case 't':
1968 case 'T':
1969 case 'd':
1970 case 'D':
1971 if (len >= 3)
1972 {
1973 p += 2;
1974 base = 10;
1975 len -= 2;
1976 }
1977 break;
1978
1979 default:
1980 base = 8;
1981 break;
1982 }
1983
1984 while (len-- > 0)
1985 {
1986 c = *p++;
1987 if (c >= 'A' && c <= 'Z')
1988 c += 'a' - 'A';
1989 if (c != 'l' && c != 'u')
1990 n *= base;
1991 if (c >= '0' && c <= '9')
1992 {
1993 if (found_suffix)
1994 return ERROR;
1995 n += i = c - '0';
1996 }
1997 else
1998 {
1999 if (base > 10 && c >= 'a' && c <= 'f')
2000 {
2001 if (found_suffix)
2002 return ERROR;
2003 n += i = c - 'a' + 10;
2004 }
2005 else if (c == 'l')
2006 {
2007 ++long_p;
2008 found_suffix = 1;
2009 }
2010 else if (c == 'u')
2011 {
2012 unsigned_p = 1;
2013 found_suffix = 1;
2014 }
2015 else
2016 return ERROR; /* Char not a digit */
2017 }
2018 if (i >= base)
2019 return ERROR; /* Invalid digit in this base */
2020
2021 /* Portably test for overflow (only works for nonzero values, so make
2022 a second check for zero). FIXME: Can't we just make n and prevn
2023 unsigned and avoid this? */
2024 if (c != 'l' && c != 'u' && (prevn >= n) && n != 0)
2025 unsigned_p = 1; /* Try something unsigned */
2026
2027 /* Portably test for unsigned overflow.
2028 FIXME: This check is wrong; for example it doesn't find overflow
2029 on 0x123456789 when LONGEST is 32 bits. */
2030 if (c != 'l' && c != 'u' && n != 0)
2031 {
2032 if (unsigned_p && prevn >= n)
2033 error (_("Numeric constant too large."));
2034 }
2035 prevn = n;
2036 }
2037
2038 /* An integer constant is an int, a long, or a long long. An L
2039 suffix forces it to be long; an LL suffix forces it to be long
2040 long. If not forced to a larger size, it gets the first type of
2041 the above that it fits in. To figure out whether it fits, we
2042 shift it right and see whether anything remains. Note that we
2043 can't shift sizeof (LONGEST) * HOST_CHAR_BIT bits or more in one
2044 operation, because many compilers will warn about such a shift
2045 (which always produces a zero result). Sometimes gdbarch_int_bit
2046 or gdbarch_long_bit will be that big, sometimes not. To deal with
2047 the case where it is we just always shift the value more than
2048 once, with fewer bits each time. */
2049
2050 un = n >> 2;
2051 if (long_p == 0
2052 && (un >> (gdbarch_int_bit (par_state->gdbarch ()) - 2)) == 0)
2053 {
2054 high_bit
2055 = ((ULONGEST)1) << (gdbarch_int_bit (par_state->gdbarch ()) - 1);
2056
2057 /* A large decimal (not hex or octal) constant (between INT_MAX
2058 and UINT_MAX) is a long or unsigned long, according to ANSI,
2059 never an unsigned int, but this code treats it as unsigned
2060 int. This probably should be fixed. GCC gives a warning on
2061 such constants. */
2062
2063 unsigned_type = parse_type (par_state)->builtin_unsigned_int;
2064 signed_type = parse_type (par_state)->builtin_int;
2065 }
2066 else if (long_p <= 1
2067 && (un >> (gdbarch_long_bit (par_state->gdbarch ()) - 2)) == 0)
2068 {
2069 high_bit
2070 = ((ULONGEST)1) << (gdbarch_long_bit (par_state->gdbarch ()) - 1);
2071 unsigned_type = parse_type (par_state)->builtin_unsigned_long;
2072 signed_type = parse_type (par_state)->builtin_long;
2073 }
2074 else
2075 {
2076 int shift;
2077 if (sizeof (ULONGEST) * HOST_CHAR_BIT
2078 < gdbarch_long_long_bit (par_state->gdbarch ()))
2079 /* A long long does not fit in a LONGEST. */
2080 shift = (sizeof (ULONGEST) * HOST_CHAR_BIT - 1);
2081 else
2082 shift = (gdbarch_long_long_bit (par_state->gdbarch ()) - 1);
2083 high_bit = (ULONGEST) 1 << shift;
2084 unsigned_type = parse_type (par_state)->builtin_unsigned_long_long;
2085 signed_type = parse_type (par_state)->builtin_long_long;
2086 }
2087
2088 putithere->typed_val_int.val = n;
2089
2090 /* If the high bit of the worked out type is set then this number
2091 has to be unsigned. */
2092
2093 if (unsigned_p || (n & high_bit))
2094 {
2095 putithere->typed_val_int.type = unsigned_type;
2096 }
2097 else
2098 {
2099 putithere->typed_val_int.type = signed_type;
2100 }
2101
2102 return INT;
2103 }
2104
2105 /* Temporary obstack used for holding strings. */
2106 static struct obstack tempbuf;
2107 static int tempbuf_init;
2108
2109 /* Parse a C escape sequence. The initial backslash of the sequence
2110 is at (*PTR)[-1]. *PTR will be updated to point to just after the
2111 last character of the sequence. If OUTPUT is not NULL, the
2112 translated form of the escape sequence will be written there. If
2113 OUTPUT is NULL, no output is written and the call will only affect
2114 *PTR. If an escape sequence is expressed in target bytes, then the
2115 entire sequence will simply be copied to OUTPUT. Return 1 if any
2116 character was emitted, 0 otherwise. */
2117
2118 int
2119 c_parse_escape (const char **ptr, struct obstack *output)
2120 {
2121 const char *tokptr = *ptr;
2122 int result = 1;
2123
2124 /* Some escape sequences undergo character set conversion. Those we
2125 translate here. */
2126 switch (*tokptr)
2127 {
2128 /* Hex escapes do not undergo character set conversion, so keep
2129 the escape sequence for later. */
2130 case 'x':
2131 if (output)
2132 obstack_grow_str (output, "\\x");
2133 ++tokptr;
2134 if (!ISXDIGIT (*tokptr))
2135 error (_("\\x escape without a following hex digit"));
2136 while (ISXDIGIT (*tokptr))
2137 {
2138 if (output)
2139 obstack_1grow (output, *tokptr);
2140 ++tokptr;
2141 }
2142 break;
2143
2144 /* Octal escapes do not undergo character set conversion, so
2145 keep the escape sequence for later. */
2146 case '0':
2147 case '1':
2148 case '2':
2149 case '3':
2150 case '4':
2151 case '5':
2152 case '6':
2153 case '7':
2154 {
2155 int i;
2156 if (output)
2157 obstack_grow_str (output, "\\");
2158 for (i = 0;
2159 i < 3 && ISDIGIT (*tokptr) && *tokptr != '8' && *tokptr != '9';
2160 ++i)
2161 {
2162 if (output)
2163 obstack_1grow (output, *tokptr);
2164 ++tokptr;
2165 }
2166 }
2167 break;
2168
2169 /* We handle UCNs later. We could handle them here, but that
2170 would mean a spurious error in the case where the UCN could
2171 be converted to the target charset but not the host
2172 charset. */
2173 case 'u':
2174 case 'U':
2175 {
2176 char c = *tokptr;
2177 int i, len = c == 'U' ? 8 : 4;
2178 if (output)
2179 {
2180 obstack_1grow (output, '\\');
2181 obstack_1grow (output, *tokptr);
2182 }
2183 ++tokptr;
2184 if (!ISXDIGIT (*tokptr))
2185 error (_("\\%c escape without a following hex digit"), c);
2186 for (i = 0; i < len && ISXDIGIT (*tokptr); ++i)
2187 {
2188 if (output)
2189 obstack_1grow (output, *tokptr);
2190 ++tokptr;
2191 }
2192 }
2193 break;
2194
2195 /* We must pass backslash through so that it does not
2196 cause quoting during the second expansion. */
2197 case '\\':
2198 if (output)
2199 obstack_grow_str (output, "\\\\");
2200 ++tokptr;
2201 break;
2202
2203 /* Escapes which undergo conversion. */
2204 case 'a':
2205 if (output)
2206 obstack_1grow (output, '\a');
2207 ++tokptr;
2208 break;
2209 case 'b':
2210 if (output)
2211 obstack_1grow (output, '\b');
2212 ++tokptr;
2213 break;
2214 case 'f':
2215 if (output)
2216 obstack_1grow (output, '\f');
2217 ++tokptr;
2218 break;
2219 case 'n':
2220 if (output)
2221 obstack_1grow (output, '\n');
2222 ++tokptr;
2223 break;
2224 case 'r':
2225 if (output)
2226 obstack_1grow (output, '\r');
2227 ++tokptr;
2228 break;
2229 case 't':
2230 if (output)
2231 obstack_1grow (output, '\t');
2232 ++tokptr;
2233 break;
2234 case 'v':
2235 if (output)
2236 obstack_1grow (output, '\v');
2237 ++tokptr;
2238 break;
2239
2240 /* GCC extension. */
2241 case 'e':
2242 if (output)
2243 obstack_1grow (output, HOST_ESCAPE_CHAR);
2244 ++tokptr;
2245 break;
2246
2247 /* Backslash-newline expands to nothing at all. */
2248 case '\n':
2249 ++tokptr;
2250 result = 0;
2251 break;
2252
2253 /* A few escapes just expand to the character itself. */
2254 case '\'':
2255 case '\"':
2256 case '?':
2257 /* GCC extensions. */
2258 case '(':
2259 case '{':
2260 case '[':
2261 case '%':
2262 /* Unrecognized escapes turn into the character itself. */
2263 default:
2264 if (output)
2265 obstack_1grow (output, *tokptr);
2266 ++tokptr;
2267 break;
2268 }
2269 *ptr = tokptr;
2270 return result;
2271 }
2272
2273 /* Parse a string or character literal from TOKPTR. The string or
2274 character may be wide or unicode. *OUTPTR is set to just after the
2275 end of the literal in the input string. The resulting token is
2276 stored in VALUE. This returns a token value, either STRING or
2277 CHAR, depending on what was parsed. *HOST_CHARS is set to the
2278 number of host characters in the literal. */
2279
2280 static int
2281 parse_string_or_char (const char *tokptr, const char **outptr,
2282 struct typed_stoken *value, int *host_chars)
2283 {
2284 int quote;
2285 c_string_type type;
2286 int is_objc = 0;
2287
2288 /* Build the gdb internal form of the input string in tempbuf. Note
2289 that the buffer is null byte terminated *only* for the
2290 convenience of debugging gdb itself and printing the buffer
2291 contents when the buffer contains no embedded nulls. Gdb does
2292 not depend upon the buffer being null byte terminated, it uses
2293 the length string instead. This allows gdb to handle C strings
2294 (as well as strings in other languages) with embedded null
2295 bytes */
2296
2297 if (!tempbuf_init)
2298 tempbuf_init = 1;
2299 else
2300 obstack_free (&tempbuf, NULL);
2301 obstack_init (&tempbuf);
2302
2303 /* Record the string type. */
2304 if (*tokptr == 'L')
2305 {
2306 type = C_WIDE_STRING;
2307 ++tokptr;
2308 }
2309 else if (*tokptr == 'u')
2310 {
2311 type = C_STRING_16;
2312 ++tokptr;
2313 }
2314 else if (*tokptr == 'U')
2315 {
2316 type = C_STRING_32;
2317 ++tokptr;
2318 }
2319 else if (*tokptr == '@')
2320 {
2321 /* An Objective C string. */
2322 is_objc = 1;
2323 type = C_STRING;
2324 ++tokptr;
2325 }
2326 else
2327 type = C_STRING;
2328
2329 /* Skip the quote. */
2330 quote = *tokptr;
2331 if (quote == '\'')
2332 type |= C_CHAR;
2333 ++tokptr;
2334
2335 *host_chars = 0;
2336
2337 while (*tokptr)
2338 {
2339 char c = *tokptr;
2340 if (c == '\\')
2341 {
2342 ++tokptr;
2343 *host_chars += c_parse_escape (&tokptr, &tempbuf);
2344 }
2345 else if (c == quote)
2346 break;
2347 else
2348 {
2349 obstack_1grow (&tempbuf, c);
2350 ++tokptr;
2351 /* FIXME: this does the wrong thing with multi-byte host
2352 characters. We could use mbrlen here, but that would
2353 make "set host-charset" a bit less useful. */
2354 ++*host_chars;
2355 }
2356 }
2357
2358 if (*tokptr != quote)
2359 {
2360 if (quote == '"')
2361 error (_("Unterminated string in expression."));
2362 else
2363 error (_("Unmatched single quote."));
2364 }
2365 ++tokptr;
2366
2367 value->type = type;
2368 value->ptr = (char *) obstack_base (&tempbuf);
2369 value->length = obstack_object_size (&tempbuf);
2370
2371 *outptr = tokptr;
2372
2373 return quote == '"' ? (is_objc ? NSSTRING : STRING) : CHAR;
2374 }
2375
2376 /* This is used to associate some attributes with a token. */
2377
2378 enum token_flag
2379 {
2380 /* If this bit is set, the token is C++-only. */
2381
2382 FLAG_CXX = 1,
2383
2384 /* If this bit is set, the token is conditional: if there is a
2385 symbol of the same name, then the token is a symbol; otherwise,
2386 the token is a keyword. */
2387
2388 FLAG_SHADOW = 2
2389 };
2390 DEF_ENUM_FLAGS_TYPE (enum token_flag, token_flags);
2391
2392 struct token
2393 {
2394 const char *oper;
2395 int token;
2396 enum exp_opcode opcode;
2397 token_flags flags;
2398 };
2399
2400 static const struct token tokentab3[] =
2401 {
2402 {">>=", ASSIGN_MODIFY, BINOP_RSH, 0},
2403 {"<<=", ASSIGN_MODIFY, BINOP_LSH, 0},
2404 {"->*", ARROW_STAR, BINOP_END, FLAG_CXX},
2405 {"...", DOTDOTDOT, BINOP_END, 0}
2406 };
2407
2408 static const struct token tokentab2[] =
2409 {
2410 {"+=", ASSIGN_MODIFY, BINOP_ADD, 0},
2411 {"-=", ASSIGN_MODIFY, BINOP_SUB, 0},
2412 {"*=", ASSIGN_MODIFY, BINOP_MUL, 0},
2413 {"/=", ASSIGN_MODIFY, BINOP_DIV, 0},
2414 {"%=", ASSIGN_MODIFY, BINOP_REM, 0},
2415 {"|=", ASSIGN_MODIFY, BINOP_BITWISE_IOR, 0},
2416 {"&=", ASSIGN_MODIFY, BINOP_BITWISE_AND, 0},
2417 {"^=", ASSIGN_MODIFY, BINOP_BITWISE_XOR, 0},
2418 {"++", INCREMENT, BINOP_END, 0},
2419 {"--", DECREMENT, BINOP_END, 0},
2420 {"->", ARROW, BINOP_END, 0},
2421 {"&&", ANDAND, BINOP_END, 0},
2422 {"||", OROR, BINOP_END, 0},
2423 /* "::" is *not* only C++: gdb overrides its meaning in several
2424 different ways, e.g., 'filename'::func, function::variable. */
2425 {"::", COLONCOLON, BINOP_END, 0},
2426 {"<<", LSH, BINOP_END, 0},
2427 {">>", RSH, BINOP_END, 0},
2428 {"==", EQUAL, BINOP_END, 0},
2429 {"!=", NOTEQUAL, BINOP_END, 0},
2430 {"<=", LEQ, BINOP_END, 0},
2431 {">=", GEQ, BINOP_END, 0},
2432 {".*", DOT_STAR, BINOP_END, FLAG_CXX}
2433 };
2434
2435 /* Identifier-like tokens. Only type-specifiers than can appear in
2436 multi-word type names (for example 'double' can appear in 'long
2437 double') need to be listed here. type-specifiers that are only ever
2438 single word (like 'float') are handled by the classify_name function. */
2439 static const struct token ident_tokens[] =
2440 {
2441 {"unsigned", UNSIGNED, OP_NULL, 0},
2442 {"template", TEMPLATE, OP_NULL, FLAG_CXX},
2443 {"volatile", VOLATILE_KEYWORD, OP_NULL, 0},
2444 {"struct", STRUCT, OP_NULL, 0},
2445 {"signed", SIGNED_KEYWORD, OP_NULL, 0},
2446 {"sizeof", SIZEOF, OP_NULL, 0},
2447 {"_Alignof", ALIGNOF, OP_NULL, 0},
2448 {"alignof", ALIGNOF, OP_NULL, FLAG_CXX},
2449 {"double", DOUBLE_KEYWORD, OP_NULL, 0},
2450 {"false", FALSEKEYWORD, OP_NULL, FLAG_CXX},
2451 {"class", CLASS, OP_NULL, FLAG_CXX},
2452 {"union", UNION, OP_NULL, 0},
2453 {"short", SHORT, OP_NULL, 0},
2454 {"const", CONST_KEYWORD, OP_NULL, 0},
2455 {"enum", ENUM, OP_NULL, 0},
2456 {"long", LONG, OP_NULL, 0},
2457 {"true", TRUEKEYWORD, OP_NULL, FLAG_CXX},
2458 {"int", INT_KEYWORD, OP_NULL, 0},
2459 {"new", NEW, OP_NULL, FLAG_CXX},
2460 {"delete", DELETE, OP_NULL, FLAG_CXX},
2461 {"operator", OPERATOR, OP_NULL, FLAG_CXX},
2462
2463 {"and", ANDAND, BINOP_END, FLAG_CXX},
2464 {"and_eq", ASSIGN_MODIFY, BINOP_BITWISE_AND, FLAG_CXX},
2465 {"bitand", '&', OP_NULL, FLAG_CXX},
2466 {"bitor", '|', OP_NULL, FLAG_CXX},
2467 {"compl", '~', OP_NULL, FLAG_CXX},
2468 {"not", '!', OP_NULL, FLAG_CXX},
2469 {"not_eq", NOTEQUAL, BINOP_END, FLAG_CXX},
2470 {"or", OROR, BINOP_END, FLAG_CXX},
2471 {"or_eq", ASSIGN_MODIFY, BINOP_BITWISE_IOR, FLAG_CXX},
2472 {"xor", '^', OP_NULL, FLAG_CXX},
2473 {"xor_eq", ASSIGN_MODIFY, BINOP_BITWISE_XOR, FLAG_CXX},
2474
2475 {"const_cast", CONST_CAST, OP_NULL, FLAG_CXX },
2476 {"dynamic_cast", DYNAMIC_CAST, OP_NULL, FLAG_CXX },
2477 {"static_cast", STATIC_CAST, OP_NULL, FLAG_CXX },
2478 {"reinterpret_cast", REINTERPRET_CAST, OP_NULL, FLAG_CXX },
2479
2480 {"__typeof__", TYPEOF, OP_TYPEOF, 0 },
2481 {"__typeof", TYPEOF, OP_TYPEOF, 0 },
2482 {"typeof", TYPEOF, OP_TYPEOF, FLAG_SHADOW },
2483 {"__decltype", DECLTYPE, OP_DECLTYPE, FLAG_CXX },
2484 {"decltype", DECLTYPE, OP_DECLTYPE, FLAG_CXX | FLAG_SHADOW },
2485
2486 {"typeid", TYPEID, OP_TYPEID, FLAG_CXX}
2487 };
2488
2489
2490 static void
2491 scan_macro_expansion (char *expansion)
2492 {
2493 const char *copy;
2494
2495 /* We'd better not be trying to push the stack twice. */
2496 gdb_assert (! cpstate->macro_original_text);
2497
2498 /* Copy to the obstack, and then free the intermediate
2499 expansion. */
2500 copy = obstack_strdup (&cpstate->expansion_obstack, expansion);
2501 xfree (expansion);
2502
2503 /* Save the old lexptr value, so we can return to it when we're done
2504 parsing the expanded text. */
2505 cpstate->macro_original_text = pstate->lexptr;
2506 pstate->lexptr = copy;
2507 }
2508
2509 static int
2510 scanning_macro_expansion (void)
2511 {
2512 return cpstate->macro_original_text != 0;
2513 }
2514
2515 static void
2516 finished_macro_expansion (void)
2517 {
2518 /* There'd better be something to pop back to. */
2519 gdb_assert (cpstate->macro_original_text);
2520
2521 /* Pop back to the original text. */
2522 pstate->lexptr = cpstate->macro_original_text;
2523 cpstate->macro_original_text = 0;
2524 }
2525
2526 /* Return true iff the token represents a C++ cast operator. */
2527
2528 static int
2529 is_cast_operator (const char *token, int len)
2530 {
2531 return (! strncmp (token, "dynamic_cast", len)
2532 || ! strncmp (token, "static_cast", len)
2533 || ! strncmp (token, "reinterpret_cast", len)
2534 || ! strncmp (token, "const_cast", len));
2535 }
2536
2537 /* The scope used for macro expansion. */
2538 static struct macro_scope *expression_macro_scope;
2539
2540 /* This is set if a NAME token appeared at the very end of the input
2541 string, with no whitespace separating the name from the EOF. This
2542 is used only when parsing to do field name completion. */
2543 static int saw_name_at_eof;
2544
2545 /* This is set if the previously-returned token was a structure
2546 operator -- either '.' or ARROW. */
2547 static bool last_was_structop;
2548
2549 /* Depth of parentheses. */
2550 static int paren_depth;
2551
2552 /* Read one token, getting characters through lexptr. */
2553
2554 static int
2555 lex_one_token (struct parser_state *par_state, bool *is_quoted_name)
2556 {
2557 int c;
2558 int namelen;
2559 unsigned int i;
2560 const char *tokstart;
2561 bool saw_structop = last_was_structop;
2562
2563 last_was_structop = false;
2564 *is_quoted_name = false;
2565
2566 retry:
2567
2568 /* Check if this is a macro invocation that we need to expand. */
2569 if (! scanning_macro_expansion ())
2570 {
2571 char *expanded = macro_expand_next (&pstate->lexptr,
2572 standard_macro_lookup,
2573 expression_macro_scope);
2574
2575 if (expanded)
2576 scan_macro_expansion (expanded);
2577 }
2578
2579 pstate->prev_lexptr = pstate->lexptr;
2580
2581 tokstart = pstate->lexptr;
2582 /* See if it is a special token of length 3. */
2583 for (i = 0; i < sizeof tokentab3 / sizeof tokentab3[0]; i++)
2584 if (strncmp (tokstart, tokentab3[i].oper, 3) == 0)
2585 {
2586 if ((tokentab3[i].flags & FLAG_CXX) != 0
2587 && par_state->language ()->la_language != language_cplus)
2588 break;
2589
2590 pstate->lexptr += 3;
2591 yylval.opcode = tokentab3[i].opcode;
2592 return tokentab3[i].token;
2593 }
2594
2595 /* See if it is a special token of length 2. */
2596 for (i = 0; i < sizeof tokentab2 / sizeof tokentab2[0]; i++)
2597 if (strncmp (tokstart, tokentab2[i].oper, 2) == 0)
2598 {
2599 if ((tokentab2[i].flags & FLAG_CXX) != 0
2600 && par_state->language ()->la_language != language_cplus)
2601 break;
2602
2603 pstate->lexptr += 2;
2604 yylval.opcode = tokentab2[i].opcode;
2605 if (tokentab2[i].token == ARROW)
2606 last_was_structop = 1;
2607 return tokentab2[i].token;
2608 }
2609
2610 switch (c = *tokstart)
2611 {
2612 case 0:
2613 /* If we were just scanning the result of a macro expansion,
2614 then we need to resume scanning the original text.
2615 If we're parsing for field name completion, and the previous
2616 token allows such completion, return a COMPLETE token.
2617 Otherwise, we were already scanning the original text, and
2618 we're really done. */
2619 if (scanning_macro_expansion ())
2620 {
2621 finished_macro_expansion ();
2622 goto retry;
2623 }
2624 else if (saw_name_at_eof)
2625 {
2626 saw_name_at_eof = 0;
2627 return COMPLETE;
2628 }
2629 else if (par_state->parse_completion && saw_structop)
2630 return COMPLETE;
2631 else
2632 return 0;
2633
2634 case ' ':
2635 case '\t':
2636 case '\n':
2637 pstate->lexptr++;
2638 goto retry;
2639
2640 case '[':
2641 case '(':
2642 paren_depth++;
2643 pstate->lexptr++;
2644 if (par_state->language ()->la_language == language_objc
2645 && c == '[')
2646 return OBJC_LBRAC;
2647 return c;
2648
2649 case ']':
2650 case ')':
2651 if (paren_depth == 0)
2652 return 0;
2653 paren_depth--;
2654 pstate->lexptr++;
2655 return c;
2656
2657 case ',':
2658 if (pstate->comma_terminates
2659 && paren_depth == 0
2660 && ! scanning_macro_expansion ())
2661 return 0;
2662 pstate->lexptr++;
2663 return c;
2664
2665 case '.':
2666 /* Might be a floating point number. */
2667 if (pstate->lexptr[1] < '0' || pstate->lexptr[1] > '9')
2668 {
2669 last_was_structop = true;
2670 goto symbol; /* Nope, must be a symbol. */
2671 }
2672 /* FALL THRU. */
2673
2674 case '0':
2675 case '1':
2676 case '2':
2677 case '3':
2678 case '4':
2679 case '5':
2680 case '6':
2681 case '7':
2682 case '8':
2683 case '9':
2684 {
2685 /* It's a number. */
2686 int got_dot = 0, got_e = 0, toktype;
2687 const char *p = tokstart;
2688 int hex = input_radix > 10;
2689
2690 if (c == '0' && (p[1] == 'x' || p[1] == 'X'))
2691 {
2692 p += 2;
2693 hex = 1;
2694 }
2695 else if (c == '0' && (p[1]=='t' || p[1]=='T' || p[1]=='d' || p[1]=='D'))
2696 {
2697 p += 2;
2698 hex = 0;
2699 }
2700
2701 for (;; ++p)
2702 {
2703 /* This test includes !hex because 'e' is a valid hex digit
2704 and thus does not indicate a floating point number when
2705 the radix is hex. */
2706 if (!hex && !got_e && (*p == 'e' || *p == 'E'))
2707 got_dot = got_e = 1;
2708 /* This test does not include !hex, because a '.' always indicates
2709 a decimal floating point number regardless of the radix. */
2710 else if (!got_dot && *p == '.')
2711 got_dot = 1;
2712 else if (got_e && (p[-1] == 'e' || p[-1] == 'E')
2713 && (*p == '-' || *p == '+'))
2714 /* This is the sign of the exponent, not the end of the
2715 number. */
2716 continue;
2717 /* We will take any letters or digits. parse_number will
2718 complain if past the radix, or if L or U are not final. */
2719 else if ((*p < '0' || *p > '9')
2720 && ((*p < 'a' || *p > 'z')
2721 && (*p < 'A' || *p > 'Z')))
2722 break;
2723 }
2724 toktype = parse_number (par_state, tokstart, p - tokstart,
2725 got_dot|got_e, &yylval);
2726 if (toktype == ERROR)
2727 {
2728 char *err_copy = (char *) alloca (p - tokstart + 1);
2729
2730 memcpy (err_copy, tokstart, p - tokstart);
2731 err_copy[p - tokstart] = 0;
2732 error (_("Invalid number \"%s\"."), err_copy);
2733 }
2734 pstate->lexptr = p;
2735 return toktype;
2736 }
2737
2738 case '@':
2739 {
2740 const char *p = &tokstart[1];
2741
2742 if (par_state->language ()->la_language == language_objc)
2743 {
2744 size_t len = strlen ("selector");
2745
2746 if (strncmp (p, "selector", len) == 0
2747 && (p[len] == '\0' || ISSPACE (p[len])))
2748 {
2749 pstate->lexptr = p + len;
2750 return SELECTOR;
2751 }
2752 else if (*p == '"')
2753 goto parse_string;
2754 }
2755
2756 while (ISSPACE (*p))
2757 p++;
2758 size_t len = strlen ("entry");
2759 if (strncmp (p, "entry", len) == 0 && !c_ident_is_alnum (p[len])
2760 && p[len] != '_')
2761 {
2762 pstate->lexptr = &p[len];
2763 return ENTRY;
2764 }
2765 }
2766 /* FALLTHRU */
2767 case '+':
2768 case '-':
2769 case '*':
2770 case '/':
2771 case '%':
2772 case '|':
2773 case '&':
2774 case '^':
2775 case '~':
2776 case '!':
2777 case '<':
2778 case '>':
2779 case '?':
2780 case ':':
2781 case '=':
2782 case '{':
2783 case '}':
2784 symbol:
2785 pstate->lexptr++;
2786 return c;
2787
2788 case 'L':
2789 case 'u':
2790 case 'U':
2791 if (tokstart[1] != '"' && tokstart[1] != '\'')
2792 break;
2793 /* Fall through. */
2794 case '\'':
2795 case '"':
2796
2797 parse_string:
2798 {
2799 int host_len;
2800 int result = parse_string_or_char (tokstart, &pstate->lexptr,
2801 &yylval.tsval, &host_len);
2802 if (result == CHAR)
2803 {
2804 if (host_len == 0)
2805 error (_("Empty character constant."));
2806 else if (host_len > 2 && c == '\'')
2807 {
2808 ++tokstart;
2809 namelen = pstate->lexptr - tokstart - 1;
2810 *is_quoted_name = true;
2811
2812 goto tryname;
2813 }
2814 else if (host_len > 1)
2815 error (_("Invalid character constant."));
2816 }
2817 return result;
2818 }
2819 }
2820
2821 if (!(c == '_' || c == '$' || c_ident_is_alpha (c)))
2822 /* We must have come across a bad character (e.g. ';'). */
2823 error (_("Invalid character '%c' in expression."), c);
2824
2825 /* It's a name. See how long it is. */
2826 namelen = 0;
2827 for (c = tokstart[namelen];
2828 (c == '_' || c == '$' || c_ident_is_alnum (c) || c == '<');)
2829 {
2830 /* Template parameter lists are part of the name.
2831 FIXME: This mishandles `print $a<4&&$a>3'. */
2832
2833 if (c == '<')
2834 {
2835 if (! is_cast_operator (tokstart, namelen))
2836 {
2837 /* Scan ahead to get rest of the template specification. Note
2838 that we look ahead only when the '<' adjoins non-whitespace
2839 characters; for comparison expressions, e.g. "a < b > c",
2840 there must be spaces before the '<', etc. */
2841 const char *p = find_template_name_end (tokstart + namelen);
2842
2843 if (p)
2844 namelen = p - tokstart;
2845 }
2846 break;
2847 }
2848 c = tokstart[++namelen];
2849 }
2850
2851 /* The token "if" terminates the expression and is NOT removed from
2852 the input stream. It doesn't count if it appears in the
2853 expansion of a macro. */
2854 if (namelen == 2
2855 && tokstart[0] == 'i'
2856 && tokstart[1] == 'f'
2857 && ! scanning_macro_expansion ())
2858 {
2859 return 0;
2860 }
2861
2862 /* For the same reason (breakpoint conditions), "thread N"
2863 terminates the expression. "thread" could be an identifier, but
2864 an identifier is never followed by a number without intervening
2865 punctuation. "task" is similar. Handle abbreviations of these,
2866 similarly to breakpoint.c:find_condition_and_thread. */
2867 if (namelen >= 1
2868 && (strncmp (tokstart, "thread", namelen) == 0
2869 || strncmp (tokstart, "task", namelen) == 0)
2870 && (tokstart[namelen] == ' ' || tokstart[namelen] == '\t')
2871 && ! scanning_macro_expansion ())
2872 {
2873 const char *p = tokstart + namelen + 1;
2874
2875 while (*p == ' ' || *p == '\t')
2876 p++;
2877 if (*p >= '0' && *p <= '9')
2878 return 0;
2879 }
2880
2881 pstate->lexptr += namelen;
2882
2883 tryname:
2884
2885 yylval.sval.ptr = tokstart;
2886 yylval.sval.length = namelen;
2887
2888 /* Catch specific keywords. */
2889 std::string copy = copy_name (yylval.sval);
2890 for (i = 0; i < sizeof ident_tokens / sizeof ident_tokens[0]; i++)
2891 if (copy == ident_tokens[i].oper)
2892 {
2893 if ((ident_tokens[i].flags & FLAG_CXX) != 0
2894 && par_state->language ()->la_language != language_cplus)
2895 break;
2896
2897 if ((ident_tokens[i].flags & FLAG_SHADOW) != 0)
2898 {
2899 struct field_of_this_result is_a_field_of_this;
2900
2901 if (lookup_symbol (copy.c_str (),
2902 pstate->expression_context_block,
2903 VAR_DOMAIN,
2904 (par_state->language ()->la_language
2905 == language_cplus ? &is_a_field_of_this
2906 : NULL)).symbol
2907 != NULL)
2908 {
2909 /* The keyword is shadowed. */
2910 break;
2911 }
2912 }
2913
2914 /* It is ok to always set this, even though we don't always
2915 strictly need to. */
2916 yylval.opcode = ident_tokens[i].opcode;
2917 return ident_tokens[i].token;
2918 }
2919
2920 if (*tokstart == '$')
2921 return DOLLAR_VARIABLE;
2922
2923 if (pstate->parse_completion && *pstate->lexptr == '\0')
2924 saw_name_at_eof = 1;
2925
2926 yylval.ssym.stoken = yylval.sval;
2927 yylval.ssym.sym.symbol = NULL;
2928 yylval.ssym.sym.block = NULL;
2929 yylval.ssym.is_a_field_of_this = 0;
2930 return NAME;
2931 }
2932
2933 /* An object of this type is pushed on a FIFO by the "outer" lexer. */
2934 struct token_and_value
2935 {
2936 int token;
2937 YYSTYPE value;
2938 };
2939
2940 /* A FIFO of tokens that have been read but not yet returned to the
2941 parser. */
2942 static std::vector<token_and_value> token_fifo;
2943
2944 /* Non-zero if the lexer should return tokens from the FIFO. */
2945 static int popping;
2946
2947 /* Temporary storage for c_lex; this holds symbol names as they are
2948 built up. */
2949 auto_obstack name_obstack;
2950
2951 /* Classify a NAME token. The contents of the token are in `yylval'.
2952 Updates yylval and returns the new token type. BLOCK is the block
2953 in which lookups start; this can be NULL to mean the global scope.
2954 IS_QUOTED_NAME is non-zero if the name token was originally quoted
2955 in single quotes. IS_AFTER_STRUCTOP is true if this name follows
2956 a structure operator -- either '.' or ARROW */
2957
2958 static int
2959 classify_name (struct parser_state *par_state, const struct block *block,
2960 bool is_quoted_name, bool is_after_structop)
2961 {
2962 struct block_symbol bsym;
2963 struct field_of_this_result is_a_field_of_this;
2964
2965 std::string copy = copy_name (yylval.sval);
2966
2967 /* Initialize this in case we *don't* use it in this call; that way
2968 we can refer to it unconditionally below. */
2969 memset (&is_a_field_of_this, 0, sizeof (is_a_field_of_this));
2970
2971 bsym = lookup_symbol (copy.c_str (), block, VAR_DOMAIN,
2972 par_state->language ()->la_name_of_this
2973 ? &is_a_field_of_this : NULL);
2974
2975 if (bsym.symbol && SYMBOL_CLASS (bsym.symbol) == LOC_BLOCK)
2976 {
2977 yylval.ssym.sym = bsym;
2978 yylval.ssym.is_a_field_of_this = is_a_field_of_this.type != NULL;
2979 return BLOCKNAME;
2980 }
2981 else if (!bsym.symbol)
2982 {
2983 /* If we found a field of 'this', we might have erroneously
2984 found a constructor where we wanted a type name. Handle this
2985 case by noticing that we found a constructor and then look up
2986 the type tag instead. */
2987 if (is_a_field_of_this.type != NULL
2988 && is_a_field_of_this.fn_field != NULL
2989 && TYPE_FN_FIELD_CONSTRUCTOR (is_a_field_of_this.fn_field->fn_fields,
2990 0))
2991 {
2992 struct field_of_this_result inner_is_a_field_of_this;
2993
2994 bsym = lookup_symbol (copy.c_str (), block, STRUCT_DOMAIN,
2995 &inner_is_a_field_of_this);
2996 if (bsym.symbol != NULL)
2997 {
2998 yylval.tsym.type = SYMBOL_TYPE (bsym.symbol);
2999 return TYPENAME;
3000 }
3001 }
3002
3003 /* If we found a field on the "this" object, or we are looking
3004 up a field on a struct, then we want to prefer it over a
3005 filename. However, if the name was quoted, then it is better
3006 to check for a filename or a block, since this is the only
3007 way the user has of requiring the extension to be used. */
3008 if ((is_a_field_of_this.type == NULL && !is_after_structop)
3009 || is_quoted_name)
3010 {
3011 /* See if it's a file name. */
3012 struct symtab *symtab;
3013
3014 symtab = lookup_symtab (copy.c_str ());
3015 if (symtab)
3016 {
3017 yylval.bval = BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (symtab),
3018 STATIC_BLOCK);
3019 return FILENAME;
3020 }
3021 }
3022 }
3023
3024 if (bsym.symbol && SYMBOL_CLASS (bsym.symbol) == LOC_TYPEDEF)
3025 {
3026 yylval.tsym.type = SYMBOL_TYPE (bsym.symbol);
3027 return TYPENAME;
3028 }
3029
3030 /* See if it's an ObjC classname. */
3031 if (par_state->language ()->la_language == language_objc && !bsym.symbol)
3032 {
3033 CORE_ADDR Class = lookup_objc_class (par_state->gdbarch (),
3034 copy.c_str ());
3035 if (Class)
3036 {
3037 struct symbol *sym;
3038
3039 yylval.theclass.theclass = Class;
3040 sym = lookup_struct_typedef (copy.c_str (),
3041 par_state->expression_context_block, 1);
3042 if (sym)
3043 yylval.theclass.type = SYMBOL_TYPE (sym);
3044 return CLASSNAME;
3045 }
3046 }
3047
3048 /* Input names that aren't symbols but ARE valid hex numbers, when
3049 the input radix permits them, can be names or numbers depending
3050 on the parse. Note we support radixes > 16 here. */
3051 if (!bsym.symbol
3052 && ((copy[0] >= 'a' && copy[0] < 'a' + input_radix - 10)
3053 || (copy[0] >= 'A' && copy[0] < 'A' + input_radix - 10)))
3054 {
3055 YYSTYPE newlval; /* Its value is ignored. */
3056 int hextype = parse_number (par_state, copy.c_str (), yylval.sval.length,
3057 0, &newlval);
3058
3059 if (hextype == INT)
3060 {
3061 yylval.ssym.sym = bsym;
3062 yylval.ssym.is_a_field_of_this = is_a_field_of_this.type != NULL;
3063 return NAME_OR_INT;
3064 }
3065 }
3066
3067 /* Any other kind of symbol */
3068 yylval.ssym.sym = bsym;
3069 yylval.ssym.is_a_field_of_this = is_a_field_of_this.type != NULL;
3070
3071 if (bsym.symbol == NULL
3072 && par_state->language ()->la_language == language_cplus
3073 && is_a_field_of_this.type == NULL
3074 && lookup_minimal_symbol (copy.c_str (), NULL, NULL).minsym == NULL)
3075 return UNKNOWN_CPP_NAME;
3076
3077 return NAME;
3078 }
3079
3080 /* Like classify_name, but used by the inner loop of the lexer, when a
3081 name might have already been seen. CONTEXT is the context type, or
3082 NULL if this is the first component of a name. */
3083
3084 static int
3085 classify_inner_name (struct parser_state *par_state,
3086 const struct block *block, struct type *context)
3087 {
3088 struct type *type;
3089
3090 if (context == NULL)
3091 return classify_name (par_state, block, false, false);
3092
3093 type = check_typedef (context);
3094 if (!type_aggregate_p (type))
3095 return ERROR;
3096
3097 std::string copy = copy_name (yylval.ssym.stoken);
3098 /* N.B. We assume the symbol can only be in VAR_DOMAIN. */
3099 yylval.ssym.sym = cp_lookup_nested_symbol (type, copy.c_str (), block,
3100 VAR_DOMAIN);
3101
3102 /* If no symbol was found, search for a matching base class named
3103 COPY. This will allow users to enter qualified names of class members
3104 relative to the `this' pointer. */
3105 if (yylval.ssym.sym.symbol == NULL)
3106 {
3107 struct type *base_type = cp_find_type_baseclass_by_name (type,
3108 copy.c_str ());
3109
3110 if (base_type != NULL)
3111 {
3112 yylval.tsym.type = base_type;
3113 return TYPENAME;
3114 }
3115
3116 return ERROR;
3117 }
3118
3119 switch (SYMBOL_CLASS (yylval.ssym.sym.symbol))
3120 {
3121 case LOC_BLOCK:
3122 case LOC_LABEL:
3123 /* cp_lookup_nested_symbol might have accidentally found a constructor
3124 named COPY when we really wanted a base class of the same name.
3125 Double-check this case by looking for a base class. */
3126 {
3127 struct type *base_type
3128 = cp_find_type_baseclass_by_name (type, copy.c_str ());
3129
3130 if (base_type != NULL)
3131 {
3132 yylval.tsym.type = base_type;
3133 return TYPENAME;
3134 }
3135 }
3136 return ERROR;
3137
3138 case LOC_TYPEDEF:
3139 yylval.tsym.type = SYMBOL_TYPE (yylval.ssym.sym.symbol);
3140 return TYPENAME;
3141
3142 default:
3143 return NAME;
3144 }
3145 internal_error (__FILE__, __LINE__, _("not reached"));
3146 }
3147
3148 /* The outer level of a two-level lexer. This calls the inner lexer
3149 to return tokens. It then either returns these tokens, or
3150 aggregates them into a larger token. This lets us work around a
3151 problem in our parsing approach, where the parser could not
3152 distinguish between qualified names and qualified types at the
3153 right point.
3154
3155 This approach is still not ideal, because it mishandles template
3156 types. See the comment in lex_one_token for an example. However,
3157 this is still an improvement over the earlier approach, and will
3158 suffice until we move to better parsing technology. */
3159
3160 static int
3161 yylex (void)
3162 {
3163 token_and_value current;
3164 int first_was_coloncolon, last_was_coloncolon;
3165 struct type *context_type = NULL;
3166 int last_to_examine, next_to_examine, checkpoint;
3167 const struct block *search_block;
3168 bool is_quoted_name, last_lex_was_structop;
3169
3170 if (popping && !token_fifo.empty ())
3171 goto do_pop;
3172 popping = 0;
3173
3174 last_lex_was_structop = last_was_structop;
3175
3176 /* Read the first token and decide what to do. Most of the
3177 subsequent code is C++-only; but also depends on seeing a "::" or
3178 name-like token. */
3179 current.token = lex_one_token (pstate, &is_quoted_name);
3180 if (current.token == NAME)
3181 current.token = classify_name (pstate, pstate->expression_context_block,
3182 is_quoted_name, last_lex_was_structop);
3183 if (pstate->language ()->la_language != language_cplus
3184 || (current.token != TYPENAME && current.token != COLONCOLON
3185 && current.token != FILENAME))
3186 return current.token;
3187
3188 /* Read any sequence of alternating "::" and name-like tokens into
3189 the token FIFO. */
3190 current.value = yylval;
3191 token_fifo.push_back (current);
3192 last_was_coloncolon = current.token == COLONCOLON;
3193 while (1)
3194 {
3195 bool ignore;
3196
3197 /* We ignore quoted names other than the very first one.
3198 Subsequent ones do not have any special meaning. */
3199 current.token = lex_one_token (pstate, &ignore);
3200 current.value = yylval;
3201 token_fifo.push_back (current);
3202
3203 if ((last_was_coloncolon && current.token != NAME)
3204 || (!last_was_coloncolon && current.token != COLONCOLON))
3205 break;
3206 last_was_coloncolon = !last_was_coloncolon;
3207 }
3208 popping = 1;
3209
3210 /* We always read one extra token, so compute the number of tokens
3211 to examine accordingly. */
3212 last_to_examine = token_fifo.size () - 2;
3213 next_to_examine = 0;
3214
3215 current = token_fifo[next_to_examine];
3216 ++next_to_examine;
3217
3218 name_obstack.clear ();
3219 checkpoint = 0;
3220 if (current.token == FILENAME)
3221 search_block = current.value.bval;
3222 else if (current.token == COLONCOLON)
3223 search_block = NULL;
3224 else
3225 {
3226 gdb_assert (current.token == TYPENAME);
3227 search_block = pstate->expression_context_block;
3228 obstack_grow (&name_obstack, current.value.sval.ptr,
3229 current.value.sval.length);
3230 context_type = current.value.tsym.type;
3231 checkpoint = 1;
3232 }
3233
3234 first_was_coloncolon = current.token == COLONCOLON;
3235 last_was_coloncolon = first_was_coloncolon;
3236
3237 while (next_to_examine <= last_to_examine)
3238 {
3239 token_and_value next;
3240
3241 next = token_fifo[next_to_examine];
3242 ++next_to_examine;
3243
3244 if (next.token == NAME && last_was_coloncolon)
3245 {
3246 int classification;
3247
3248 yylval = next.value;
3249 classification = classify_inner_name (pstate, search_block,
3250 context_type);
3251 /* We keep going until we either run out of names, or until
3252 we have a qualified name which is not a type. */
3253 if (classification != TYPENAME && classification != NAME)
3254 break;
3255
3256 /* Accept up to this token. */
3257 checkpoint = next_to_examine;
3258
3259 /* Update the partial name we are constructing. */
3260 if (context_type != NULL)
3261 {
3262 /* We don't want to put a leading "::" into the name. */
3263 obstack_grow_str (&name_obstack, "::");
3264 }
3265 obstack_grow (&name_obstack, next.value.sval.ptr,
3266 next.value.sval.length);
3267
3268 yylval.sval.ptr = (const char *) obstack_base (&name_obstack);
3269 yylval.sval.length = obstack_object_size (&name_obstack);
3270 current.value = yylval;
3271 current.token = classification;
3272
3273 last_was_coloncolon = 0;
3274
3275 if (classification == NAME)
3276 break;
3277
3278 context_type = yylval.tsym.type;
3279 }
3280 else if (next.token == COLONCOLON && !last_was_coloncolon)
3281 last_was_coloncolon = 1;
3282 else
3283 {
3284 /* We've reached the end of the name. */
3285 break;
3286 }
3287 }
3288
3289 /* If we have a replacement token, install it as the first token in
3290 the FIFO, and delete the other constituent tokens. */
3291 if (checkpoint > 0)
3292 {
3293 current.value.sval.ptr
3294 = obstack_strndup (&cpstate->expansion_obstack,
3295 current.value.sval.ptr,
3296 current.value.sval.length);
3297
3298 token_fifo[0] = current;
3299 if (checkpoint > 1)
3300 token_fifo.erase (token_fifo.begin () + 1,
3301 token_fifo.begin () + checkpoint);
3302 }
3303
3304 do_pop:
3305 current = token_fifo[0];
3306 token_fifo.erase (token_fifo.begin ());
3307 yylval = current.value;
3308 return current.token;
3309 }
3310
3311 int
3312 c_parse (struct parser_state *par_state)
3313 {
3314 /* Setting up the parser state. */
3315 scoped_restore pstate_restore = make_scoped_restore (&pstate);
3316 gdb_assert (par_state != NULL);
3317 pstate = par_state;
3318
3319 c_parse_state cstate;
3320 scoped_restore cstate_restore = make_scoped_restore (&cpstate, &cstate);
3321
3322 gdb::unique_xmalloc_ptr<struct macro_scope> macro_scope;
3323
3324 if (par_state->expression_context_block)
3325 macro_scope
3326 = sal_macro_scope (find_pc_line (par_state->expression_context_pc, 0));
3327 else
3328 macro_scope = default_macro_scope ();
3329 if (! macro_scope)
3330 macro_scope = user_macro_scope ();
3331
3332 scoped_restore restore_macro_scope
3333 = make_scoped_restore (&expression_macro_scope, macro_scope.get ());
3334
3335 scoped_restore restore_yydebug = make_scoped_restore (&yydebug,
3336 parser_debug);
3337
3338 /* Initialize some state used by the lexer. */
3339 last_was_structop = false;
3340 saw_name_at_eof = 0;
3341 paren_depth = 0;
3342
3343 token_fifo.clear ();
3344 popping = 0;
3345 name_obstack.clear ();
3346
3347 return yyparse ();
3348 }
3349
3350 #ifdef YYBISON
3351
3352 /* This is called via the YYPRINT macro when parser debugging is
3353 enabled. It prints a token's value. */
3354
3355 static void
3356 c_print_token (FILE *file, int type, YYSTYPE value)
3357 {
3358 switch (type)
3359 {
3360 case INT:
3361 parser_fprintf (file, "typed_val_int<%s, %s>",
3362 TYPE_SAFE_NAME (value.typed_val_int.type),
3363 pulongest (value.typed_val_int.val));
3364 break;
3365
3366 case CHAR:
3367 case STRING:
3368 {
3369 char *copy = (char *) alloca (value.tsval.length + 1);
3370
3371 memcpy (copy, value.tsval.ptr, value.tsval.length);
3372 copy[value.tsval.length] = '\0';
3373
3374 parser_fprintf (file, "tsval<type=%d, %s>", value.tsval.type, copy);
3375 }
3376 break;
3377
3378 case NSSTRING:
3379 case DOLLAR_VARIABLE:
3380 parser_fprintf (file, "sval<%s>", copy_name (value.sval).c_str ());
3381 break;
3382
3383 case TYPENAME:
3384 parser_fprintf (file, "tsym<type=%s, name=%s>",
3385 TYPE_SAFE_NAME (value.tsym.type),
3386 copy_name (value.tsym.stoken).c_str ());
3387 break;
3388
3389 case NAME:
3390 case UNKNOWN_CPP_NAME:
3391 case NAME_OR_INT:
3392 case BLOCKNAME:
3393 parser_fprintf (file, "ssym<name=%s, sym=%s, field_of_this=%d>",
3394 copy_name (value.ssym.stoken).c_str (),
3395 (value.ssym.sym.symbol == NULL
3396 ? "(null)" : SYMBOL_PRINT_NAME (value.ssym.sym.symbol)),
3397 value.ssym.is_a_field_of_this);
3398 break;
3399
3400 case FILENAME:
3401 parser_fprintf (file, "bval<%s>", host_address_to_string (value.bval));
3402 break;
3403 }
3404 }
3405
3406 #endif
3407
3408 static void
3409 yyerror (const char *msg)
3410 {
3411 if (pstate->prev_lexptr)
3412 pstate->lexptr = pstate->prev_lexptr;
3413
3414 error (_("A %s in expression, near `%s'."), msg, pstate->lexptr);
3415 }
GDB Binutils - Deliverables
This page took 0.15441 seconds and 3 git commands to generate.