1 /* YACC parser for C expressions, for GDB.
2 Copyright (C) 1986-2018 Free Software Foundation, Inc.
4 This file is part of GDB.
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.
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.
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/>. */
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.
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. */
40 #include "expression.h"
42 #include "parser-defs.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 */
51 #include "cp-support.h"
52 #include "macroscope.h"
53 #include "objc-lang.h"
54 #include "typeprint.h"
57 #define parse_type(ps) builtin_type (parse_gdbarch (ps))
59 /* Remap normal yacc parser interface names (yyparse, yylex, yyerror,
61 #define GDB_YY_REMAP_PREFIX c_
64 /* The state of the parser, used internally when we are parsing the
67 static struct parser_state *pstate = NULL;
71 static int yylex (void);
73 static void yyerror (const char *);
75 static int type_aggregate_p (struct type *);
79 /* Although the yacc "value" of an expression is not used,
80 since the result is stored in the structure being created,
81 other node types do have values. */
96 struct typed_stoken tsval;
100 const struct block *bval;
101 enum exp_opcode opcode;
103 struct stoken_vector svec;
104 VEC (type_ptr) *tvec;
106 struct type_stack *type_stack;
108 struct objc_class_str theclass;
112 /* YYSTYPE gets defined by %union */
113 static int parse_number (struct parser_state *par_state,
114 const char *, int, int, YYSTYPE *);
115 static struct stoken operator_stoken (const char *);
116 static void check_parameter_typelist (VEC (type_ptr) *);
117 static void write_destructor_name (struct parser_state *par_state,
121 static void c_print_token (FILE *file, int type, YYSTYPE value);
122 #define YYPRINT(FILE, TYPE, VALUE) c_print_token (FILE, TYPE, VALUE)
126 %type <voidval> exp exp1 type_exp start variable qualified_name lcurly function_method
128 %type <tval> type typebase
129 %type <tvec> nonempty_typelist func_mod parameter_typelist
130 /* %type <bval> block */
132 /* Fancy type parsing. */
134 %type <lval> array_mod
135 %type <tval> conversion_type_id
137 %type <type_stack> ptr_operator_ts abs_decl direct_abs_decl
139 %token <typed_val_int> INT
140 %token <typed_val_float> FLOAT
142 /* Both NAME and TYPENAME tokens represent symbols in the input,
143 and both convey their data as strings.
144 But a TYPENAME is a string that happens to be defined as a typedef
145 or builtin type name (such as int or char)
146 and a NAME is any other symbol.
147 Contexts where this distinction is not important can use the
148 nonterminal "name", which matches either NAME or TYPENAME. */
150 %token <tsval> STRING
151 %token <sval> NSSTRING /* ObjC Foundation "NSString" literal */
152 %token SELECTOR /* ObjC "@selector" pseudo-operator */
154 %token <ssym> NAME /* BLOCKNAME defined below to give it higher precedence. */
155 %token <ssym> UNKNOWN_CPP_NAME
156 %token <voidval> COMPLETE
157 %token <tsym> TYPENAME
158 %token <theclass> CLASSNAME /* ObjC Class name */
160 %type <svec> string_exp
161 %type <ssym> name_not_typename
162 %type <tsym> type_name
164 /* This is like a '[' token, but is only generated when parsing
165 Objective C. This lets us reuse the same parser without
166 erroneously parsing ObjC-specific expressions in C. */
169 /* A NAME_OR_INT is a symbol which is not known in the symbol table,
170 but which would parse as a valid number in the current input radix.
171 E.g. "c" when input_radix==16. Depending on the parse, it will be
172 turned into a name or into a number. */
174 %token <ssym> NAME_OR_INT
177 %token STRUCT CLASS UNION ENUM SIZEOF ALIGNOF UNSIGNED COLONCOLON
182 %token REINTERPRET_CAST DYNAMIC_CAST STATIC_CAST CONST_CAST
188 /* Special type cases, put in to allow the parser to distinguish different
190 %token SIGNED_KEYWORD LONG SHORT INT_KEYWORD CONST_KEYWORD VOLATILE_KEYWORD DOUBLE_KEYWORD
192 %token <sval> VARIABLE
194 %token <opcode> ASSIGN_MODIFY
203 %right '=' ASSIGN_MODIFY
211 %left '<' '>' LEQ GEQ
216 %right UNARY INCREMENT DECREMENT
217 %right ARROW ARROW_STAR '.' DOT_STAR '[' OBJC_LBRAC '('
218 %token <ssym> BLOCKNAME
219 %token <bval> FILENAME
233 { write_exp_elt_opcode(pstate, OP_TYPE);
234 write_exp_elt_type(pstate, $1);
235 write_exp_elt_opcode(pstate, OP_TYPE);}
238 write_exp_elt_opcode (pstate, OP_TYPEOF);
240 | TYPEOF '(' type ')'
242 write_exp_elt_opcode (pstate, OP_TYPE);
243 write_exp_elt_type (pstate, $3);
244 write_exp_elt_opcode (pstate, OP_TYPE);
246 | DECLTYPE '(' exp ')'
248 write_exp_elt_opcode (pstate, OP_DECLTYPE);
252 /* Expressions, including the comma operator. */
255 { write_exp_elt_opcode (pstate, BINOP_COMMA); }
258 /* Expressions, not including the comma operator. */
259 exp : '*' exp %prec UNARY
260 { write_exp_elt_opcode (pstate, UNOP_IND); }
263 exp : '&' exp %prec UNARY
264 { write_exp_elt_opcode (pstate, UNOP_ADDR); }
267 exp : '-' exp %prec UNARY
268 { write_exp_elt_opcode (pstate, UNOP_NEG); }
271 exp : '+' exp %prec UNARY
272 { write_exp_elt_opcode (pstate, UNOP_PLUS); }
275 exp : '!' exp %prec UNARY
276 { write_exp_elt_opcode (pstate, UNOP_LOGICAL_NOT); }
279 exp : '~' exp %prec UNARY
280 { write_exp_elt_opcode (pstate, UNOP_COMPLEMENT); }
283 exp : INCREMENT exp %prec UNARY
284 { write_exp_elt_opcode (pstate, UNOP_PREINCREMENT); }
287 exp : DECREMENT exp %prec UNARY
288 { write_exp_elt_opcode (pstate, UNOP_PREDECREMENT); }
291 exp : exp INCREMENT %prec UNARY
292 { write_exp_elt_opcode (pstate, UNOP_POSTINCREMENT); }
295 exp : exp DECREMENT %prec UNARY
296 { write_exp_elt_opcode (pstate, UNOP_POSTDECREMENT); }
299 exp : TYPEID '(' exp ')' %prec UNARY
300 { write_exp_elt_opcode (pstate, OP_TYPEID); }
303 exp : TYPEID '(' type_exp ')' %prec UNARY
304 { write_exp_elt_opcode (pstate, OP_TYPEID); }
307 exp : SIZEOF exp %prec UNARY
308 { write_exp_elt_opcode (pstate, UNOP_SIZEOF); }
311 exp : ALIGNOF '(' type_exp ')' %prec UNARY
312 { write_exp_elt_opcode (pstate, UNOP_ALIGNOF); }
316 { write_exp_elt_opcode (pstate, STRUCTOP_PTR);
317 write_exp_string (pstate, $3);
318 write_exp_elt_opcode (pstate, STRUCTOP_PTR); }
321 exp : exp ARROW name COMPLETE
322 { mark_struct_expression (pstate);
323 write_exp_elt_opcode (pstate, STRUCTOP_PTR);
324 write_exp_string (pstate, $3);
325 write_exp_elt_opcode (pstate, STRUCTOP_PTR); }
328 exp : exp ARROW COMPLETE
330 mark_struct_expression (pstate);
331 write_exp_elt_opcode (pstate, STRUCTOP_PTR);
334 write_exp_string (pstate, s);
335 write_exp_elt_opcode (pstate, STRUCTOP_PTR); }
338 exp : exp ARROW '~' name
339 { write_exp_elt_opcode (pstate, STRUCTOP_PTR);
340 write_destructor_name (pstate, $4);
341 write_exp_elt_opcode (pstate, STRUCTOP_PTR); }
344 exp : exp ARROW '~' name COMPLETE
345 { mark_struct_expression (pstate);
346 write_exp_elt_opcode (pstate, STRUCTOP_PTR);
347 write_destructor_name (pstate, $4);
348 write_exp_elt_opcode (pstate, STRUCTOP_PTR); }
351 exp : exp ARROW qualified_name
352 { /* exp->type::name becomes exp->*(&type::name) */
353 /* Note: this doesn't work if name is a
354 static member! FIXME */
355 write_exp_elt_opcode (pstate, UNOP_ADDR);
356 write_exp_elt_opcode (pstate, STRUCTOP_MPTR); }
359 exp : exp ARROW_STAR exp
360 { write_exp_elt_opcode (pstate, STRUCTOP_MPTR); }
364 { write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
365 write_exp_string (pstate, $3);
366 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
369 exp : exp '.' name COMPLETE
370 { mark_struct_expression (pstate);
371 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
372 write_exp_string (pstate, $3);
373 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
376 exp : exp '.' COMPLETE
378 mark_struct_expression (pstate);
379 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
382 write_exp_string (pstate, s);
383 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
386 exp : exp '.' '~' name
387 { write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
388 write_destructor_name (pstate, $4);
389 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
392 exp : exp '.' '~' name COMPLETE
393 { mark_struct_expression (pstate);
394 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
395 write_destructor_name (pstate, $4);
396 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
399 exp : exp '.' qualified_name
400 { /* exp.type::name becomes exp.*(&type::name) */
401 /* Note: this doesn't work if name is a
402 static member! FIXME */
403 write_exp_elt_opcode (pstate, UNOP_ADDR);
404 write_exp_elt_opcode (pstate, STRUCTOP_MEMBER); }
407 exp : exp DOT_STAR exp
408 { write_exp_elt_opcode (pstate, STRUCTOP_MEMBER); }
411 exp : exp '[' exp1 ']'
412 { write_exp_elt_opcode (pstate, BINOP_SUBSCRIPT); }
415 exp : exp OBJC_LBRAC exp1 ']'
416 { write_exp_elt_opcode (pstate, BINOP_SUBSCRIPT); }
420 * The rules below parse ObjC message calls of the form:
421 * '[' target selector {':' argument}* ']'
424 exp : OBJC_LBRAC TYPENAME
428 theclass = lookup_objc_class (parse_gdbarch (pstate),
429 copy_name ($2.stoken));
431 error (_("%s is not an ObjC Class"),
432 copy_name ($2.stoken));
433 write_exp_elt_opcode (pstate, OP_LONG);
434 write_exp_elt_type (pstate,
435 parse_type (pstate)->builtin_int);
436 write_exp_elt_longcst (pstate, (LONGEST) theclass);
437 write_exp_elt_opcode (pstate, OP_LONG);
441 { write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
442 end_msglist (pstate);
443 write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
447 exp : OBJC_LBRAC CLASSNAME
449 write_exp_elt_opcode (pstate, OP_LONG);
450 write_exp_elt_type (pstate,
451 parse_type (pstate)->builtin_int);
452 write_exp_elt_longcst (pstate, (LONGEST) $2.theclass);
453 write_exp_elt_opcode (pstate, OP_LONG);
457 { write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
458 end_msglist (pstate);
459 write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
466 { write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
467 end_msglist (pstate);
468 write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
473 { add_msglist(&$1, 0); }
481 msgarg : name ':' exp
482 { add_msglist(&$1, 1); }
483 | ':' exp /* Unnamed arg. */
484 { add_msglist(0, 1); }
485 | ',' exp /* Variable number of args. */
486 { add_msglist(0, 0); }
490 /* This is to save the value of arglist_len
491 being accumulated by an outer function call. */
492 { start_arglist (); }
493 arglist ')' %prec ARROW
494 { write_exp_elt_opcode (pstate, OP_FUNCALL);
495 write_exp_elt_longcst (pstate,
496 (LONGEST) end_arglist ());
497 write_exp_elt_opcode (pstate, OP_FUNCALL); }
500 /* This is here to disambiguate with the production for
501 "func()::static_var" further below, which uses
502 function_method_void. */
503 exp : exp '(' ')' %prec ARROW
505 write_exp_elt_opcode (pstate, OP_FUNCALL);
506 write_exp_elt_longcst (pstate,
507 (LONGEST) end_arglist ());
508 write_exp_elt_opcode (pstate, OP_FUNCALL); }
512 exp : UNKNOWN_CPP_NAME '('
514 /* This could potentially be a an argument defined
515 lookup function (Koenig). */
516 write_exp_elt_opcode (pstate, OP_ADL_FUNC);
517 write_exp_elt_block (pstate,
518 expression_context_block);
519 write_exp_elt_sym (pstate,
520 NULL); /* Placeholder. */
521 write_exp_string (pstate, $1.stoken);
522 write_exp_elt_opcode (pstate, OP_ADL_FUNC);
524 /* This is to save the value of arglist_len
525 being accumulated by an outer function call. */
529 arglist ')' %prec ARROW
531 write_exp_elt_opcode (pstate, OP_FUNCALL);
532 write_exp_elt_longcst (pstate,
533 (LONGEST) end_arglist ());
534 write_exp_elt_opcode (pstate, OP_FUNCALL);
539 { start_arglist (); }
549 arglist : arglist ',' exp %prec ABOVE_COMMA
553 function_method: exp '(' parameter_typelist ')' const_or_volatile
555 VEC (type_ptr) *type_list = $3;
556 struct type *type_elt;
557 LONGEST len = VEC_length (type_ptr, type_list);
559 write_exp_elt_opcode (pstate, TYPE_INSTANCE);
560 /* Save the const/volatile qualifiers as
561 recorded by the const_or_volatile
562 production's actions. */
563 write_exp_elt_longcst (pstate,
564 follow_type_instance_flags ());
565 write_exp_elt_longcst (pstate, len);
567 VEC_iterate (type_ptr, type_list, i, type_elt);
569 write_exp_elt_type (pstate, type_elt);
570 write_exp_elt_longcst(pstate, len);
571 write_exp_elt_opcode (pstate, TYPE_INSTANCE);
572 VEC_free (type_ptr, type_list);
576 function_method_void: exp '(' ')' const_or_volatile
577 { write_exp_elt_opcode (pstate, TYPE_INSTANCE);
579 write_exp_elt_longcst (pstate,
580 follow_type_instance_flags ());
581 write_exp_elt_longcst (pstate, 0);
582 write_exp_elt_longcst (pstate, 0);
583 write_exp_elt_opcode (pstate, TYPE_INSTANCE);
587 exp : function_method
590 /* Normally we must interpret "func()" as a function call, instead of
591 a type. The user needs to write func(void) to disambiguate.
592 However, in the "func()::static_var" case, there's no
594 function_method_void_or_typelist: function_method
595 | function_method_void
598 exp : function_method_void_or_typelist COLONCOLON name
600 write_exp_elt_opcode (pstate, OP_FUNC_STATIC_VAR);
601 write_exp_string (pstate, $3);
602 write_exp_elt_opcode (pstate, OP_FUNC_STATIC_VAR);
607 { $$ = end_arglist () - 1; }
609 exp : lcurly arglist rcurly %prec ARROW
610 { write_exp_elt_opcode (pstate, OP_ARRAY);
611 write_exp_elt_longcst (pstate, (LONGEST) 0);
612 write_exp_elt_longcst (pstate, (LONGEST) $3);
613 write_exp_elt_opcode (pstate, OP_ARRAY); }
616 exp : lcurly type_exp rcurly exp %prec UNARY
617 { write_exp_elt_opcode (pstate, UNOP_MEMVAL_TYPE); }
620 exp : '(' type_exp ')' exp %prec UNARY
621 { write_exp_elt_opcode (pstate, UNOP_CAST_TYPE); }
628 /* Binary operators in order of decreasing precedence. */
631 { write_exp_elt_opcode (pstate, BINOP_REPEAT); }
635 { write_exp_elt_opcode (pstate, BINOP_MUL); }
639 { write_exp_elt_opcode (pstate, BINOP_DIV); }
643 { write_exp_elt_opcode (pstate, BINOP_REM); }
647 { write_exp_elt_opcode (pstate, BINOP_ADD); }
651 { write_exp_elt_opcode (pstate, BINOP_SUB); }
655 { write_exp_elt_opcode (pstate, BINOP_LSH); }
659 { write_exp_elt_opcode (pstate, BINOP_RSH); }
663 { write_exp_elt_opcode (pstate, BINOP_EQUAL); }
666 exp : exp NOTEQUAL exp
667 { write_exp_elt_opcode (pstate, BINOP_NOTEQUAL); }
671 { write_exp_elt_opcode (pstate, BINOP_LEQ); }
675 { write_exp_elt_opcode (pstate, BINOP_GEQ); }
679 { write_exp_elt_opcode (pstate, BINOP_LESS); }
683 { write_exp_elt_opcode (pstate, BINOP_GTR); }
687 { write_exp_elt_opcode (pstate, BINOP_BITWISE_AND); }
691 { write_exp_elt_opcode (pstate, BINOP_BITWISE_XOR); }
695 { write_exp_elt_opcode (pstate, BINOP_BITWISE_IOR); }
699 { write_exp_elt_opcode (pstate, BINOP_LOGICAL_AND); }
703 { write_exp_elt_opcode (pstate, BINOP_LOGICAL_OR); }
706 exp : exp '?' exp ':' exp %prec '?'
707 { write_exp_elt_opcode (pstate, TERNOP_COND); }
711 { write_exp_elt_opcode (pstate, BINOP_ASSIGN); }
714 exp : exp ASSIGN_MODIFY exp
715 { write_exp_elt_opcode (pstate, BINOP_ASSIGN_MODIFY);
716 write_exp_elt_opcode (pstate, $2);
717 write_exp_elt_opcode (pstate,
718 BINOP_ASSIGN_MODIFY); }
722 { write_exp_elt_opcode (pstate, OP_LONG);
723 write_exp_elt_type (pstate, $1.type);
724 write_exp_elt_longcst (pstate, (LONGEST) ($1.val));
725 write_exp_elt_opcode (pstate, OP_LONG); }
730 struct stoken_vector vec;
733 write_exp_string_vector (pstate, $1.type, &vec);
739 parse_number (pstate, $1.stoken.ptr,
740 $1.stoken.length, 0, &val);
741 write_exp_elt_opcode (pstate, OP_LONG);
742 write_exp_elt_type (pstate, val.typed_val_int.type);
743 write_exp_elt_longcst (pstate,
744 (LONGEST) val.typed_val_int.val);
745 write_exp_elt_opcode (pstate, OP_LONG);
751 { write_exp_elt_opcode (pstate, OP_FLOAT);
752 write_exp_elt_type (pstate, $1.type);
753 write_exp_elt_floatcst (pstate, $1.val);
754 write_exp_elt_opcode (pstate, OP_FLOAT); }
762 write_dollar_variable (pstate, $1);
766 exp : SELECTOR '(' name ')'
768 write_exp_elt_opcode (pstate, OP_OBJC_SELECTOR);
769 write_exp_string (pstate, $3);
770 write_exp_elt_opcode (pstate, OP_OBJC_SELECTOR); }
773 exp : SIZEOF '(' type ')' %prec UNARY
774 { struct type *type = $3;
775 write_exp_elt_opcode (pstate, OP_LONG);
776 write_exp_elt_type (pstate, lookup_signed_typename
777 (parse_language (pstate),
778 parse_gdbarch (pstate),
780 type = check_typedef (type);
782 /* $5.3.3/2 of the C++ Standard (n3290 draft)
783 says of sizeof: "When applied to a reference
784 or a reference type, the result is the size of
785 the referenced type." */
786 if (TYPE_IS_REFERENCE (type))
787 type = check_typedef (TYPE_TARGET_TYPE (type));
788 write_exp_elt_longcst (pstate,
789 (LONGEST) TYPE_LENGTH (type));
790 write_exp_elt_opcode (pstate, OP_LONG); }
793 exp : REINTERPRET_CAST '<' type_exp '>' '(' exp ')' %prec UNARY
794 { write_exp_elt_opcode (pstate,
795 UNOP_REINTERPRET_CAST); }
798 exp : STATIC_CAST '<' type_exp '>' '(' exp ')' %prec UNARY
799 { write_exp_elt_opcode (pstate, UNOP_CAST_TYPE); }
802 exp : DYNAMIC_CAST '<' type_exp '>' '(' exp ')' %prec UNARY
803 { write_exp_elt_opcode (pstate, UNOP_DYNAMIC_CAST); }
806 exp : CONST_CAST '<' type_exp '>' '(' exp ')' %prec UNARY
807 { /* We could do more error checking here, but
808 it doesn't seem worthwhile. */
809 write_exp_elt_opcode (pstate, UNOP_CAST_TYPE); }
815 /* We copy the string here, and not in the
816 lexer, to guarantee that we do not leak a
817 string. Note that we follow the
818 NUL-termination convention of the
820 struct typed_stoken *vec = XNEW (struct typed_stoken);
825 vec->length = $1.length;
826 vec->ptr = (char *) malloc ($1.length + 1);
827 memcpy (vec->ptr, $1.ptr, $1.length + 1);
832 /* Note that we NUL-terminate here, but just
836 $$.tokens = XRESIZEVEC (struct typed_stoken,
839 p = (char *) malloc ($2.length + 1);
840 memcpy (p, $2.ptr, $2.length + 1);
842 $$.tokens[$$.len - 1].type = $2.type;
843 $$.tokens[$$.len - 1].length = $2.length;
844 $$.tokens[$$.len - 1].ptr = p;
851 c_string_type type = C_STRING;
853 for (i = 0; i < $1.len; ++i)
855 switch ($1.tokens[i].type)
863 && type != $1.tokens[i].type)
864 error (_("Undefined string concatenation."));
865 type = (enum c_string_type_values) $1.tokens[i].type;
869 internal_error (__FILE__, __LINE__,
870 "unrecognized type in string concatenation");
874 write_exp_string_vector (pstate, type, &$1);
875 for (i = 0; i < $1.len; ++i)
876 free ($1.tokens[i].ptr);
881 exp : NSSTRING /* ObjC NextStep NSString constant
882 * of the form '@' '"' string '"'.
884 { write_exp_elt_opcode (pstate, OP_OBJC_NSSTRING);
885 write_exp_string (pstate, $1);
886 write_exp_elt_opcode (pstate, OP_OBJC_NSSTRING); }
891 { write_exp_elt_opcode (pstate, OP_LONG);
892 write_exp_elt_type (pstate,
893 parse_type (pstate)->builtin_bool);
894 write_exp_elt_longcst (pstate, (LONGEST) 1);
895 write_exp_elt_opcode (pstate, OP_LONG); }
899 { write_exp_elt_opcode (pstate, OP_LONG);
900 write_exp_elt_type (pstate,
901 parse_type (pstate)->builtin_bool);
902 write_exp_elt_longcst (pstate, (LONGEST) 0);
903 write_exp_elt_opcode (pstate, OP_LONG); }
911 $$ = SYMBOL_BLOCK_VALUE ($1.sym.symbol);
913 error (_("No file or function \"%s\"."),
914 copy_name ($1.stoken));
922 block : block COLONCOLON name
924 = lookup_symbol (copy_name ($3), $1,
925 VAR_DOMAIN, NULL).symbol;
927 if (!tem || SYMBOL_CLASS (tem) != LOC_BLOCK)
928 error (_("No function \"%s\" in specified context."),
930 $$ = SYMBOL_BLOCK_VALUE (tem); }
933 variable: name_not_typename ENTRY
934 { struct symbol *sym = $1.sym.symbol;
936 if (sym == NULL || !SYMBOL_IS_ARGUMENT (sym)
937 || !symbol_read_needs_frame (sym))
938 error (_("@entry can be used only for function "
939 "parameters, not for \"%s\""),
940 copy_name ($1.stoken));
942 write_exp_elt_opcode (pstate, OP_VAR_ENTRY_VALUE);
943 write_exp_elt_sym (pstate, sym);
944 write_exp_elt_opcode (pstate, OP_VAR_ENTRY_VALUE);
948 variable: block COLONCOLON name
949 { struct block_symbol sym
950 = lookup_symbol (copy_name ($3), $1,
954 error (_("No symbol \"%s\" in specified context."),
956 if (symbol_read_needs_frame (sym.symbol))
958 innermost_block.update (sym);
960 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
961 write_exp_elt_block (pstate, sym.block);
962 write_exp_elt_sym (pstate, sym.symbol);
963 write_exp_elt_opcode (pstate, OP_VAR_VALUE); }
966 qualified_name: TYPENAME COLONCOLON name
968 struct type *type = $1.type;
969 type = check_typedef (type);
970 if (!type_aggregate_p (type))
971 error (_("`%s' is not defined as an aggregate type."),
972 TYPE_SAFE_NAME (type));
974 write_exp_elt_opcode (pstate, OP_SCOPE);
975 write_exp_elt_type (pstate, type);
976 write_exp_string (pstate, $3);
977 write_exp_elt_opcode (pstate, OP_SCOPE);
979 | TYPENAME COLONCOLON '~' name
981 struct type *type = $1.type;
982 struct stoken tmp_token;
985 type = check_typedef (type);
986 if (!type_aggregate_p (type))
987 error (_("`%s' is not defined as an aggregate type."),
988 TYPE_SAFE_NAME (type));
989 buf = (char *) alloca ($4.length + 2);
991 tmp_token.length = $4.length + 1;
993 memcpy (buf+1, $4.ptr, $4.length);
994 buf[tmp_token.length] = 0;
996 /* Check for valid destructor name. */
997 destructor_name_p (tmp_token.ptr, $1.type);
998 write_exp_elt_opcode (pstate, OP_SCOPE);
999 write_exp_elt_type (pstate, type);
1000 write_exp_string (pstate, tmp_token);
1001 write_exp_elt_opcode (pstate, OP_SCOPE);
1003 | TYPENAME COLONCOLON name COLONCOLON name
1005 char *copy = copy_name ($3);
1006 error (_("No type \"%s\" within class "
1007 "or namespace \"%s\"."),
1008 copy, TYPE_SAFE_NAME ($1.type));
1012 variable: qualified_name
1013 | COLONCOLON name_not_typename
1015 char *name = copy_name ($2.stoken);
1017 struct bound_minimal_symbol msymbol;
1020 = lookup_symbol (name, (const struct block *) NULL,
1021 VAR_DOMAIN, NULL).symbol;
1024 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1025 write_exp_elt_block (pstate, NULL);
1026 write_exp_elt_sym (pstate, sym);
1027 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1031 msymbol = lookup_bound_minimal_symbol (name);
1032 if (msymbol.minsym != NULL)
1033 write_exp_msymbol (pstate, msymbol);
1034 else if (!have_full_symbols () && !have_partial_symbols ())
1035 error (_("No symbol table is loaded. Use the \"file\" command."));
1037 error (_("No symbol \"%s\" in current context."), name);
1041 variable: name_not_typename
1042 { struct block_symbol sym = $1.sym;
1046 if (symbol_read_needs_frame (sym.symbol))
1047 innermost_block.update (sym);
1049 /* If we found a function, see if it's
1050 an ifunc resolver that has the same
1051 address as the ifunc symbol itself.
1052 If so, prefer the ifunc symbol. */
1054 bound_minimal_symbol resolver
1055 = find_gnu_ifunc (sym.symbol);
1056 if (resolver.minsym != NULL)
1057 write_exp_msymbol (pstate, resolver);
1060 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1061 write_exp_elt_block (pstate, sym.block);
1062 write_exp_elt_sym (pstate, sym.symbol);
1063 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1066 else if ($1.is_a_field_of_this)
1068 /* C++: it hangs off of `this'. Must
1069 not inadvertently convert from a method call
1071 innermost_block.update (sym);
1072 write_exp_elt_opcode (pstate, OP_THIS);
1073 write_exp_elt_opcode (pstate, OP_THIS);
1074 write_exp_elt_opcode (pstate, STRUCTOP_PTR);
1075 write_exp_string (pstate, $1.stoken);
1076 write_exp_elt_opcode (pstate, STRUCTOP_PTR);
1080 char *arg = copy_name ($1.stoken);
1082 bound_minimal_symbol msymbol
1083 = lookup_bound_minimal_symbol (arg);
1084 if (msymbol.minsym == NULL)
1086 if (!have_full_symbols () && !have_partial_symbols ())
1087 error (_("No symbol table is loaded. Use the \"file\" command."));
1089 error (_("No symbol \"%s\" in current context."),
1090 copy_name ($1.stoken));
1093 /* This minsym might be an alias for
1094 another function. See if we can find
1095 the debug symbol for the target, and
1096 if so, use it instead, since it has
1097 return type / prototype info. This
1098 is important for example for "p
1099 *__errno_location()". */
1100 symbol *alias_target
1101 = ((msymbol.minsym->type != mst_text_gnu_ifunc
1102 && msymbol.minsym->type != mst_data_gnu_ifunc)
1103 ? find_function_alias_target (msymbol)
1105 if (alias_target != NULL)
1107 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1109 (pstate, SYMBOL_BLOCK_VALUE (alias_target));
1110 write_exp_elt_sym (pstate, alias_target);
1111 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1114 write_exp_msymbol (pstate, msymbol);
1119 space_identifier : '@' NAME
1120 { insert_type_address_space (pstate, copy_name ($2.stoken)); }
1123 const_or_volatile: const_or_volatile_noopt
1127 cv_with_space_id : const_or_volatile space_identifier const_or_volatile
1130 const_or_volatile_or_space_identifier_noopt: cv_with_space_id
1131 | const_or_volatile_noopt
1134 const_or_volatile_or_space_identifier:
1135 const_or_volatile_or_space_identifier_noopt
1141 { insert_type (tp_pointer); }
1142 const_or_volatile_or_space_identifier
1144 { insert_type (tp_pointer); }
1145 const_or_volatile_or_space_identifier
1147 { insert_type (tp_reference); }
1149 { insert_type (tp_reference); }
1151 { insert_type (tp_rvalue_reference); }
1152 | ANDAND ptr_operator
1153 { insert_type (tp_rvalue_reference); }
1156 ptr_operator_ts: ptr_operator
1158 $$ = get_type_stack ();
1159 /* This cleanup is eventually run by
1161 make_cleanup (type_stack_cleanup, $$);
1165 abs_decl: ptr_operator_ts direct_abs_decl
1166 { $$ = append_type_stack ($2, $1); }
1171 direct_abs_decl: '(' abs_decl ')'
1173 | direct_abs_decl array_mod
1175 push_type_stack ($1);
1177 push_type (tp_array);
1178 $$ = get_type_stack ();
1183 push_type (tp_array);
1184 $$ = get_type_stack ();
1187 | direct_abs_decl func_mod
1189 push_type_stack ($1);
1191 $$ = get_type_stack ();
1196 $$ = get_type_stack ();
1206 | OBJC_LBRAC INT ']'
1212 | '(' parameter_typelist ')'
1216 /* We used to try to recognize pointer to member types here, but
1217 that didn't work (shift/reduce conflicts meant that these rules never
1218 got executed). The problem is that
1219 int (foo::bar::baz::bizzle)
1220 is a function type but
1221 int (foo::bar::baz::bizzle::*)
1222 is a pointer to member type. Stroustrup loses again! */
1227 typebase /* Implements (approximately): (type-qualifier)* type-specifier */
1231 { $$ = lookup_signed_typename (parse_language (pstate),
1232 parse_gdbarch (pstate),
1235 { $$ = lookup_signed_typename (parse_language (pstate),
1236 parse_gdbarch (pstate),
1239 { $$ = lookup_signed_typename (parse_language (pstate),
1240 parse_gdbarch (pstate),
1243 { $$ = lookup_signed_typename (parse_language (pstate),
1244 parse_gdbarch (pstate),
1246 | LONG SIGNED_KEYWORD INT_KEYWORD
1247 { $$ = lookup_signed_typename (parse_language (pstate),
1248 parse_gdbarch (pstate),
1250 | LONG SIGNED_KEYWORD
1251 { $$ = lookup_signed_typename (parse_language (pstate),
1252 parse_gdbarch (pstate),
1254 | SIGNED_KEYWORD LONG INT_KEYWORD
1255 { $$ = lookup_signed_typename (parse_language (pstate),
1256 parse_gdbarch (pstate),
1258 | UNSIGNED LONG INT_KEYWORD
1259 { $$ = lookup_unsigned_typename (parse_language (pstate),
1260 parse_gdbarch (pstate),
1262 | LONG UNSIGNED INT_KEYWORD
1263 { $$ = lookup_unsigned_typename (parse_language (pstate),
1264 parse_gdbarch (pstate),
1267 { $$ = lookup_unsigned_typename (parse_language (pstate),
1268 parse_gdbarch (pstate),
1271 { $$ = lookup_signed_typename (parse_language (pstate),
1272 parse_gdbarch (pstate),
1274 | LONG LONG INT_KEYWORD
1275 { $$ = lookup_signed_typename (parse_language (pstate),
1276 parse_gdbarch (pstate),
1278 | LONG LONG SIGNED_KEYWORD INT_KEYWORD
1279 { $$ = lookup_signed_typename (parse_language (pstate),
1280 parse_gdbarch (pstate),
1282 | LONG LONG SIGNED_KEYWORD
1283 { $$ = lookup_signed_typename (parse_language (pstate),
1284 parse_gdbarch (pstate),
1286 | SIGNED_KEYWORD LONG LONG
1287 { $$ = lookup_signed_typename (parse_language (pstate),
1288 parse_gdbarch (pstate),
1290 | SIGNED_KEYWORD LONG LONG INT_KEYWORD
1291 { $$ = lookup_signed_typename (parse_language (pstate),
1292 parse_gdbarch (pstate),
1294 | UNSIGNED LONG LONG
1295 { $$ = lookup_unsigned_typename (parse_language (pstate),
1296 parse_gdbarch (pstate),
1298 | UNSIGNED LONG LONG INT_KEYWORD
1299 { $$ = lookup_unsigned_typename (parse_language (pstate),
1300 parse_gdbarch (pstate),
1302 | LONG LONG UNSIGNED
1303 { $$ = lookup_unsigned_typename (parse_language (pstate),
1304 parse_gdbarch (pstate),
1306 | LONG LONG UNSIGNED INT_KEYWORD
1307 { $$ = lookup_unsigned_typename (parse_language (pstate),
1308 parse_gdbarch (pstate),
1311 { $$ = lookup_signed_typename (parse_language (pstate),
1312 parse_gdbarch (pstate),
1314 | SHORT SIGNED_KEYWORD INT_KEYWORD
1315 { $$ = lookup_signed_typename (parse_language (pstate),
1316 parse_gdbarch (pstate),
1318 | SHORT SIGNED_KEYWORD
1319 { $$ = lookup_signed_typename (parse_language (pstate),
1320 parse_gdbarch (pstate),
1322 | UNSIGNED SHORT INT_KEYWORD
1323 { $$ = lookup_unsigned_typename (parse_language (pstate),
1324 parse_gdbarch (pstate),
1327 { $$ = lookup_unsigned_typename (parse_language (pstate),
1328 parse_gdbarch (pstate),
1330 | SHORT UNSIGNED INT_KEYWORD
1331 { $$ = lookup_unsigned_typename (parse_language (pstate),
1332 parse_gdbarch (pstate),
1335 { $$ = lookup_typename (parse_language (pstate),
1336 parse_gdbarch (pstate),
1338 (struct block *) NULL,
1340 | LONG DOUBLE_KEYWORD
1341 { $$ = lookup_typename (parse_language (pstate),
1342 parse_gdbarch (pstate),
1344 (struct block *) NULL,
1347 { $$ = lookup_struct (copy_name ($2),
1348 expression_context_block); }
1351 mark_completion_tag (TYPE_CODE_STRUCT, "", 0);
1354 | STRUCT name COMPLETE
1356 mark_completion_tag (TYPE_CODE_STRUCT, $2.ptr,
1361 { $$ = lookup_struct (copy_name ($2),
1362 expression_context_block); }
1365 mark_completion_tag (TYPE_CODE_STRUCT, "", 0);
1368 | CLASS name COMPLETE
1370 mark_completion_tag (TYPE_CODE_STRUCT, $2.ptr,
1375 { $$ = lookup_union (copy_name ($2),
1376 expression_context_block); }
1379 mark_completion_tag (TYPE_CODE_UNION, "", 0);
1382 | UNION name COMPLETE
1384 mark_completion_tag (TYPE_CODE_UNION, $2.ptr,
1389 { $$ = lookup_enum (copy_name ($2),
1390 expression_context_block); }
1393 mark_completion_tag (TYPE_CODE_ENUM, "", 0);
1396 | ENUM name COMPLETE
1398 mark_completion_tag (TYPE_CODE_ENUM, $2.ptr,
1402 | UNSIGNED type_name
1403 { $$ = lookup_unsigned_typename (parse_language (pstate),
1404 parse_gdbarch (pstate),
1405 TYPE_NAME($2.type)); }
1407 { $$ = lookup_unsigned_typename (parse_language (pstate),
1408 parse_gdbarch (pstate),
1410 | SIGNED_KEYWORD type_name
1411 { $$ = lookup_signed_typename (parse_language (pstate),
1412 parse_gdbarch (pstate),
1413 TYPE_NAME($2.type)); }
1415 { $$ = lookup_signed_typename (parse_language (pstate),
1416 parse_gdbarch (pstate),
1418 /* It appears that this rule for templates is never
1419 reduced; template recognition happens by lookahead
1420 in the token processing code in yylex. */
1421 | TEMPLATE name '<' type '>'
1422 { $$ = lookup_template_type(copy_name($2), $4,
1423 expression_context_block);
1425 | const_or_volatile_or_space_identifier_noopt typebase
1426 { $$ = follow_types ($2); }
1427 | typebase const_or_volatile_or_space_identifier_noopt
1428 { $$ = follow_types ($1); }
1434 $$.stoken.ptr = "int";
1435 $$.stoken.length = 3;
1436 $$.type = lookup_signed_typename (parse_language (pstate),
1437 parse_gdbarch (pstate),
1442 $$.stoken.ptr = "long";
1443 $$.stoken.length = 4;
1444 $$.type = lookup_signed_typename (parse_language (pstate),
1445 parse_gdbarch (pstate),
1450 $$.stoken.ptr = "short";
1451 $$.stoken.length = 5;
1452 $$.type = lookup_signed_typename (parse_language (pstate),
1453 parse_gdbarch (pstate),
1460 { check_parameter_typelist ($1); }
1461 | nonempty_typelist ',' DOTDOTDOT
1463 VEC_safe_push (type_ptr, $1, NULL);
1464 check_parameter_typelist ($1);
1472 VEC (type_ptr) *typelist = NULL;
1473 VEC_safe_push (type_ptr, typelist, $1);
1476 | nonempty_typelist ',' type
1478 VEC_safe_push (type_ptr, $1, $3);
1486 push_type_stack ($2);
1487 $$ = follow_types ($1);
1491 conversion_type_id: typebase conversion_declarator
1492 { $$ = follow_types ($1); }
1495 conversion_declarator: /* Nothing. */
1496 | ptr_operator conversion_declarator
1499 const_and_volatile: CONST_KEYWORD VOLATILE_KEYWORD
1500 | VOLATILE_KEYWORD CONST_KEYWORD
1503 const_or_volatile_noopt: const_and_volatile
1504 { insert_type (tp_const);
1505 insert_type (tp_volatile);
1508 { insert_type (tp_const); }
1510 { insert_type (tp_volatile); }
1514 { $$ = operator_stoken (" new"); }
1516 { $$ = operator_stoken (" delete"); }
1517 | OPERATOR NEW '[' ']'
1518 { $$ = operator_stoken (" new[]"); }
1519 | OPERATOR DELETE '[' ']'
1520 { $$ = operator_stoken (" delete[]"); }
1521 | OPERATOR NEW OBJC_LBRAC ']'
1522 { $$ = operator_stoken (" new[]"); }
1523 | OPERATOR DELETE OBJC_LBRAC ']'
1524 { $$ = operator_stoken (" delete[]"); }
1526 { $$ = operator_stoken ("+"); }
1528 { $$ = operator_stoken ("-"); }
1530 { $$ = operator_stoken ("*"); }
1532 { $$ = operator_stoken ("/"); }
1534 { $$ = operator_stoken ("%"); }
1536 { $$ = operator_stoken ("^"); }
1538 { $$ = operator_stoken ("&"); }
1540 { $$ = operator_stoken ("|"); }
1542 { $$ = operator_stoken ("~"); }
1544 { $$ = operator_stoken ("!"); }
1546 { $$ = operator_stoken ("="); }
1548 { $$ = operator_stoken ("<"); }
1550 { $$ = operator_stoken (">"); }
1551 | OPERATOR ASSIGN_MODIFY
1552 { const char *op = " unknown";
1576 case BINOP_BITWISE_IOR:
1579 case BINOP_BITWISE_AND:
1582 case BINOP_BITWISE_XOR:
1589 $$ = operator_stoken (op);
1592 { $$ = operator_stoken ("<<"); }
1594 { $$ = operator_stoken (">>"); }
1596 { $$ = operator_stoken ("=="); }
1598 { $$ = operator_stoken ("!="); }
1600 { $$ = operator_stoken ("<="); }
1602 { $$ = operator_stoken (">="); }
1604 { $$ = operator_stoken ("&&"); }
1606 { $$ = operator_stoken ("||"); }
1607 | OPERATOR INCREMENT
1608 { $$ = operator_stoken ("++"); }
1609 | OPERATOR DECREMENT
1610 { $$ = operator_stoken ("--"); }
1612 { $$ = operator_stoken (","); }
1613 | OPERATOR ARROW_STAR
1614 { $$ = operator_stoken ("->*"); }
1616 { $$ = operator_stoken ("->"); }
1618 { $$ = operator_stoken ("()"); }
1620 { $$ = operator_stoken ("[]"); }
1621 | OPERATOR OBJC_LBRAC ']'
1622 { $$ = operator_stoken ("[]"); }
1623 | OPERATOR conversion_type_id
1626 c_print_type ($2, NULL, &buf, -1, 0,
1627 &type_print_raw_options);
1629 /* This also needs canonicalization. */
1631 = cp_canonicalize_string (buf.c_str ());
1633 canon = std::move (buf.string ());
1634 $$ = operator_stoken ((" " + canon).c_str ());
1640 name : NAME { $$ = $1.stoken; }
1641 | BLOCKNAME { $$ = $1.stoken; }
1642 | TYPENAME { $$ = $1.stoken; }
1643 | NAME_OR_INT { $$ = $1.stoken; }
1644 | UNKNOWN_CPP_NAME { $$ = $1.stoken; }
1648 name_not_typename : NAME
1650 /* These would be useful if name_not_typename was useful, but it is just
1651 a fake for "variable", so these cause reduce/reduce conflicts because
1652 the parser can't tell whether NAME_OR_INT is a name_not_typename (=variable,
1653 =exp) or just an exp. If name_not_typename was ever used in an lvalue
1654 context where only a name could occur, this might be useful.
1659 struct field_of_this_result is_a_field_of_this;
1662 $$.sym = lookup_symbol ($1.ptr,
1663 expression_context_block,
1665 &is_a_field_of_this);
1666 $$.is_a_field_of_this
1667 = is_a_field_of_this.type != NULL;
1674 /* Like write_exp_string, but prepends a '~'. */
1677 write_destructor_name (struct parser_state *par_state, struct stoken token)
1679 char *copy = (char *) alloca (token.length + 1);
1682 memcpy (©[1], token.ptr, token.length);
1687 write_exp_string (par_state, token);
1690 /* Returns a stoken of the operator name given by OP (which does not
1691 include the string "operator"). */
1693 static struct stoken
1694 operator_stoken (const char *op)
1696 struct stoken st = { NULL, 0 };
1699 st.length = CP_OPERATOR_LEN + strlen (op);
1700 buf = (char *) malloc (st.length + 1);
1701 strcpy (buf, CP_OPERATOR_STR);
1705 /* The toplevel (c_parse) will free the memory allocated here. */
1706 make_cleanup (free, buf);
1710 /* Return true if the type is aggregate-like. */
1713 type_aggregate_p (struct type *type)
1715 return (TYPE_CODE (type) == TYPE_CODE_STRUCT
1716 || TYPE_CODE (type) == TYPE_CODE_UNION
1717 || TYPE_CODE (type) == TYPE_CODE_NAMESPACE
1718 || (TYPE_CODE (type) == TYPE_CODE_ENUM
1719 && TYPE_DECLARED_CLASS (type)));
1722 /* Validate a parameter typelist. */
1725 check_parameter_typelist (VEC (type_ptr) *params)
1730 for (ix = 0; VEC_iterate (type_ptr, params, ix, type); ++ix)
1732 if (type != NULL && TYPE_CODE (check_typedef (type)) == TYPE_CODE_VOID)
1736 if (VEC_length (type_ptr, params) == 1)
1741 VEC_free (type_ptr, params);
1742 error (_("parameter types following 'void'"));
1746 VEC_free (type_ptr, params);
1747 error (_("'void' invalid as parameter type"));
1753 /* Take care of parsing a number (anything that starts with a digit).
1754 Set yylval and return the token type; update lexptr.
1755 LEN is the number of characters in it. */
1757 /*** Needs some error checking for the float case ***/
1760 parse_number (struct parser_state *par_state,
1761 const char *buf, int len, int parsed_float, YYSTYPE *putithere)
1769 int base = input_radix;
1772 /* Number of "L" suffixes encountered. */
1775 /* We have found a "L" or "U" suffix. */
1776 int found_suffix = 0;
1779 struct type *signed_type;
1780 struct type *unsigned_type;
1783 p = (char *) alloca (len);
1784 memcpy (p, buf, len);
1788 /* Handle suffixes for decimal floating-point: "df", "dd" or "dl". */
1789 if (len >= 2 && p[len - 2] == 'd' && p[len - 1] == 'f')
1791 putithere->typed_val_float.type
1792 = parse_type (par_state)->builtin_decfloat;
1795 else if (len >= 2 && p[len - 2] == 'd' && p[len - 1] == 'd')
1797 putithere->typed_val_float.type
1798 = parse_type (par_state)->builtin_decdouble;
1801 else if (len >= 2 && p[len - 2] == 'd' && p[len - 1] == 'l')
1803 putithere->typed_val_float.type
1804 = parse_type (par_state)->builtin_declong;
1807 /* Handle suffixes: 'f' for float, 'l' for long double. */
1808 else if (len >= 1 && TOLOWER (p[len - 1]) == 'f')
1810 putithere->typed_val_float.type
1811 = parse_type (par_state)->builtin_float;
1814 else if (len >= 1 && TOLOWER (p[len - 1]) == 'l')
1816 putithere->typed_val_float.type
1817 = parse_type (par_state)->builtin_long_double;
1820 /* Default type for floating-point literals is double. */
1823 putithere->typed_val_float.type
1824 = parse_type (par_state)->builtin_double;
1827 if (!parse_float (p, len,
1828 putithere->typed_val_float.type,
1829 putithere->typed_val_float.val))
1834 /* Handle base-switching prefixes 0x, 0t, 0d, 0 */
1835 if (p[0] == '0' && len > 1)
1878 if (c >= 'A' && c <= 'Z')
1880 if (c != 'l' && c != 'u')
1882 if (c >= '0' && c <= '9')
1890 if (base > 10 && c >= 'a' && c <= 'f')
1894 n += i = c - 'a' + 10;
1907 return ERROR; /* Char not a digit */
1910 return ERROR; /* Invalid digit in this base */
1912 /* Portably test for overflow (only works for nonzero values, so make
1913 a second check for zero). FIXME: Can't we just make n and prevn
1914 unsigned and avoid this? */
1915 if (c != 'l' && c != 'u' && (prevn >= n) && n != 0)
1916 unsigned_p = 1; /* Try something unsigned */
1918 /* Portably test for unsigned overflow.
1919 FIXME: This check is wrong; for example it doesn't find overflow
1920 on 0x123456789 when LONGEST is 32 bits. */
1921 if (c != 'l' && c != 'u' && n != 0)
1923 if (unsigned_p && prevn >= n)
1924 error (_("Numeric constant too large."));
1929 /* An integer constant is an int, a long, or a long long. An L
1930 suffix forces it to be long; an LL suffix forces it to be long
1931 long. If not forced to a larger size, it gets the first type of
1932 the above that it fits in. To figure out whether it fits, we
1933 shift it right and see whether anything remains. Note that we
1934 can't shift sizeof (LONGEST) * HOST_CHAR_BIT bits or more in one
1935 operation, because many compilers will warn about such a shift
1936 (which always produces a zero result). Sometimes gdbarch_int_bit
1937 or gdbarch_long_bit will be that big, sometimes not. To deal with
1938 the case where it is we just always shift the value more than
1939 once, with fewer bits each time. */
1943 && (un >> (gdbarch_int_bit (parse_gdbarch (par_state)) - 2)) == 0)
1946 = ((ULONGEST)1) << (gdbarch_int_bit (parse_gdbarch (par_state)) - 1);
1948 /* A large decimal (not hex or octal) constant (between INT_MAX
1949 and UINT_MAX) is a long or unsigned long, according to ANSI,
1950 never an unsigned int, but this code treats it as unsigned
1951 int. This probably should be fixed. GCC gives a warning on
1954 unsigned_type = parse_type (par_state)->builtin_unsigned_int;
1955 signed_type = parse_type (par_state)->builtin_int;
1957 else if (long_p <= 1
1958 && (un >> (gdbarch_long_bit (parse_gdbarch (par_state)) - 2)) == 0)
1961 = ((ULONGEST)1) << (gdbarch_long_bit (parse_gdbarch (par_state)) - 1);
1962 unsigned_type = parse_type (par_state)->builtin_unsigned_long;
1963 signed_type = parse_type (par_state)->builtin_long;
1968 if (sizeof (ULONGEST) * HOST_CHAR_BIT
1969 < gdbarch_long_long_bit (parse_gdbarch (par_state)))
1970 /* A long long does not fit in a LONGEST. */
1971 shift = (sizeof (ULONGEST) * HOST_CHAR_BIT - 1);
1973 shift = (gdbarch_long_long_bit (parse_gdbarch (par_state)) - 1);
1974 high_bit = (ULONGEST) 1 << shift;
1975 unsigned_type = parse_type (par_state)->builtin_unsigned_long_long;
1976 signed_type = parse_type (par_state)->builtin_long_long;
1979 putithere->typed_val_int.val = n;
1981 /* If the high bit of the worked out type is set then this number
1982 has to be unsigned. */
1984 if (unsigned_p || (n & high_bit))
1986 putithere->typed_val_int.type = unsigned_type;
1990 putithere->typed_val_int.type = signed_type;
1996 /* Temporary obstack used for holding strings. */
1997 static struct obstack tempbuf;
1998 static int tempbuf_init;
2000 /* Parse a C escape sequence. The initial backslash of the sequence
2001 is at (*PTR)[-1]. *PTR will be updated to point to just after the
2002 last character of the sequence. If OUTPUT is not NULL, the
2003 translated form of the escape sequence will be written there. If
2004 OUTPUT is NULL, no output is written and the call will only affect
2005 *PTR. If an escape sequence is expressed in target bytes, then the
2006 entire sequence will simply be copied to OUTPUT. Return 1 if any
2007 character was emitted, 0 otherwise. */
2010 c_parse_escape (const char **ptr, struct obstack *output)
2012 const char *tokptr = *ptr;
2015 /* Some escape sequences undergo character set conversion. Those we
2019 /* Hex escapes do not undergo character set conversion, so keep
2020 the escape sequence for later. */
2023 obstack_grow_str (output, "\\x");
2025 if (!ISXDIGIT (*tokptr))
2026 error (_("\\x escape without a following hex digit"));
2027 while (ISXDIGIT (*tokptr))
2030 obstack_1grow (output, *tokptr);
2035 /* Octal escapes do not undergo character set conversion, so
2036 keep the escape sequence for later. */
2048 obstack_grow_str (output, "\\");
2050 i < 3 && ISDIGIT (*tokptr) && *tokptr != '8' && *tokptr != '9';
2054 obstack_1grow (output, *tokptr);
2060 /* We handle UCNs later. We could handle them here, but that
2061 would mean a spurious error in the case where the UCN could
2062 be converted to the target charset but not the host
2068 int i, len = c == 'U' ? 8 : 4;
2071 obstack_1grow (output, '\\');
2072 obstack_1grow (output, *tokptr);
2075 if (!ISXDIGIT (*tokptr))
2076 error (_("\\%c escape without a following hex digit"), c);
2077 for (i = 0; i < len && ISXDIGIT (*tokptr); ++i)
2080 obstack_1grow (output, *tokptr);
2086 /* We must pass backslash through so that it does not
2087 cause quoting during the second expansion. */
2090 obstack_grow_str (output, "\\\\");
2094 /* Escapes which undergo conversion. */
2097 obstack_1grow (output, '\a');
2102 obstack_1grow (output, '\b');
2107 obstack_1grow (output, '\f');
2112 obstack_1grow (output, '\n');
2117 obstack_1grow (output, '\r');
2122 obstack_1grow (output, '\t');
2127 obstack_1grow (output, '\v');
2131 /* GCC extension. */
2134 obstack_1grow (output, HOST_ESCAPE_CHAR);
2138 /* Backslash-newline expands to nothing at all. */
2144 /* A few escapes just expand to the character itself. */
2148 /* GCC extensions. */
2153 /* Unrecognized escapes turn into the character itself. */
2156 obstack_1grow (output, *tokptr);
2164 /* Parse a string or character literal from TOKPTR. The string or
2165 character may be wide or unicode. *OUTPTR is set to just after the
2166 end of the literal in the input string. The resulting token is
2167 stored in VALUE. This returns a token value, either STRING or
2168 CHAR, depending on what was parsed. *HOST_CHARS is set to the
2169 number of host characters in the literal. */
2172 parse_string_or_char (const char *tokptr, const char **outptr,
2173 struct typed_stoken *value, int *host_chars)
2179 /* Build the gdb internal form of the input string in tempbuf. Note
2180 that the buffer is null byte terminated *only* for the
2181 convenience of debugging gdb itself and printing the buffer
2182 contents when the buffer contains no embedded nulls. Gdb does
2183 not depend upon the buffer being null byte terminated, it uses
2184 the length string instead. This allows gdb to handle C strings
2185 (as well as strings in other languages) with embedded null
2191 obstack_free (&tempbuf, NULL);
2192 obstack_init (&tempbuf);
2194 /* Record the string type. */
2197 type = C_WIDE_STRING;
2200 else if (*tokptr == 'u')
2205 else if (*tokptr == 'U')
2210 else if (*tokptr == '@')
2212 /* An Objective C string. */
2220 /* Skip the quote. */
2234 *host_chars += c_parse_escape (&tokptr, &tempbuf);
2236 else if (c == quote)
2240 obstack_1grow (&tempbuf, c);
2242 /* FIXME: this does the wrong thing with multi-byte host
2243 characters. We could use mbrlen here, but that would
2244 make "set host-charset" a bit less useful. */
2249 if (*tokptr != quote)
2252 error (_("Unterminated string in expression."));
2254 error (_("Unmatched single quote."));
2259 value->ptr = (char *) obstack_base (&tempbuf);
2260 value->length = obstack_object_size (&tempbuf);
2264 return quote == '"' ? (is_objc ? NSSTRING : STRING) : CHAR;
2267 /* This is used to associate some attributes with a token. */
2271 /* If this bit is set, the token is C++-only. */
2275 /* If this bit is set, the token is conditional: if there is a
2276 symbol of the same name, then the token is a symbol; otherwise,
2277 the token is a keyword. */
2281 DEF_ENUM_FLAGS_TYPE (enum token_flag, token_flags);
2287 enum exp_opcode opcode;
2291 static const struct token tokentab3[] =
2293 {">>=", ASSIGN_MODIFY, BINOP_RSH, 0},
2294 {"<<=", ASSIGN_MODIFY, BINOP_LSH, 0},
2295 {"->*", ARROW_STAR, BINOP_END, FLAG_CXX},
2296 {"...", DOTDOTDOT, BINOP_END, 0}
2299 static const struct token tokentab2[] =
2301 {"+=", ASSIGN_MODIFY, BINOP_ADD, 0},
2302 {"-=", ASSIGN_MODIFY, BINOP_SUB, 0},
2303 {"*=", ASSIGN_MODIFY, BINOP_MUL, 0},
2304 {"/=", ASSIGN_MODIFY, BINOP_DIV, 0},
2305 {"%=", ASSIGN_MODIFY, BINOP_REM, 0},
2306 {"|=", ASSIGN_MODIFY, BINOP_BITWISE_IOR, 0},
2307 {"&=", ASSIGN_MODIFY, BINOP_BITWISE_AND, 0},
2308 {"^=", ASSIGN_MODIFY, BINOP_BITWISE_XOR, 0},
2309 {"++", INCREMENT, BINOP_END, 0},
2310 {"--", DECREMENT, BINOP_END, 0},
2311 {"->", ARROW, BINOP_END, 0},
2312 {"&&", ANDAND, BINOP_END, 0},
2313 {"||", OROR, BINOP_END, 0},
2314 /* "::" is *not* only C++: gdb overrides its meaning in several
2315 different ways, e.g., 'filename'::func, function::variable. */
2316 {"::", COLONCOLON, BINOP_END, 0},
2317 {"<<", LSH, BINOP_END, 0},
2318 {">>", RSH, BINOP_END, 0},
2319 {"==", EQUAL, BINOP_END, 0},
2320 {"!=", NOTEQUAL, BINOP_END, 0},
2321 {"<=", LEQ, BINOP_END, 0},
2322 {">=", GEQ, BINOP_END, 0},
2323 {".*", DOT_STAR, BINOP_END, FLAG_CXX}
2326 /* Identifier-like tokens. */
2327 static const struct token ident_tokens[] =
2329 {"unsigned", UNSIGNED, OP_NULL, 0},
2330 {"template", TEMPLATE, OP_NULL, FLAG_CXX},
2331 {"volatile", VOLATILE_KEYWORD, OP_NULL, 0},
2332 {"struct", STRUCT, OP_NULL, 0},
2333 {"signed", SIGNED_KEYWORD, OP_NULL, 0},
2334 {"sizeof", SIZEOF, OP_NULL, 0},
2335 {"_Alignof", ALIGNOF, OP_NULL, 0},
2336 {"alignof", ALIGNOF, OP_NULL, FLAG_CXX},
2337 {"double", DOUBLE_KEYWORD, OP_NULL, 0},
2338 {"false", FALSEKEYWORD, OP_NULL, FLAG_CXX},
2339 {"class", CLASS, OP_NULL, FLAG_CXX},
2340 {"union", UNION, OP_NULL, 0},
2341 {"short", SHORT, OP_NULL, 0},
2342 {"const", CONST_KEYWORD, OP_NULL, 0},
2343 {"enum", ENUM, OP_NULL, 0},
2344 {"long", LONG, OP_NULL, 0},
2345 {"true", TRUEKEYWORD, OP_NULL, FLAG_CXX},
2346 {"int", INT_KEYWORD, OP_NULL, 0},
2347 {"new", NEW, OP_NULL, FLAG_CXX},
2348 {"delete", DELETE, OP_NULL, FLAG_CXX},
2349 {"operator", OPERATOR, OP_NULL, FLAG_CXX},
2351 {"and", ANDAND, BINOP_END, FLAG_CXX},
2352 {"and_eq", ASSIGN_MODIFY, BINOP_BITWISE_AND, FLAG_CXX},
2353 {"bitand", '&', OP_NULL, FLAG_CXX},
2354 {"bitor", '|', OP_NULL, FLAG_CXX},
2355 {"compl", '~', OP_NULL, FLAG_CXX},
2356 {"not", '!', OP_NULL, FLAG_CXX},
2357 {"not_eq", NOTEQUAL, BINOP_END, FLAG_CXX},
2358 {"or", OROR, BINOP_END, FLAG_CXX},
2359 {"or_eq", ASSIGN_MODIFY, BINOP_BITWISE_IOR, FLAG_CXX},
2360 {"xor", '^', OP_NULL, FLAG_CXX},
2361 {"xor_eq", ASSIGN_MODIFY, BINOP_BITWISE_XOR, FLAG_CXX},
2363 {"const_cast", CONST_CAST, OP_NULL, FLAG_CXX },
2364 {"dynamic_cast", DYNAMIC_CAST, OP_NULL, FLAG_CXX },
2365 {"static_cast", STATIC_CAST, OP_NULL, FLAG_CXX },
2366 {"reinterpret_cast", REINTERPRET_CAST, OP_NULL, FLAG_CXX },
2368 {"__typeof__", TYPEOF, OP_TYPEOF, 0 },
2369 {"__typeof", TYPEOF, OP_TYPEOF, 0 },
2370 {"typeof", TYPEOF, OP_TYPEOF, FLAG_SHADOW },
2371 {"__decltype", DECLTYPE, OP_DECLTYPE, FLAG_CXX },
2372 {"decltype", DECLTYPE, OP_DECLTYPE, FLAG_CXX | FLAG_SHADOW },
2374 {"typeid", TYPEID, OP_TYPEID, FLAG_CXX}
2377 /* When we find that lexptr (the global var defined in parse.c) is
2378 pointing at a macro invocation, we expand the invocation, and call
2379 scan_macro_expansion to save the old lexptr here and point lexptr
2380 into the expanded text. When we reach the end of that, we call
2381 end_macro_expansion to pop back to the value we saved here. The
2382 macro expansion code promises to return only fully-expanded text,
2383 so we don't need to "push" more than one level.
2385 This is disgusting, of course. It would be cleaner to do all macro
2386 expansion beforehand, and then hand that to lexptr. But we don't
2387 really know where the expression ends. Remember, in a command like
2389 (gdb) break *ADDRESS if CONDITION
2391 we evaluate ADDRESS in the scope of the current frame, but we
2392 evaluate CONDITION in the scope of the breakpoint's location. So
2393 it's simply wrong to try to macro-expand the whole thing at once. */
2394 static const char *macro_original_text;
2396 /* We save all intermediate macro expansions on this obstack for the
2397 duration of a single parse. The expansion text may sometimes have
2398 to live past the end of the expansion, due to yacc lookahead.
2399 Rather than try to be clever about saving the data for a single
2400 token, we simply keep it all and delete it after parsing has
2402 static struct obstack expansion_obstack;
2405 scan_macro_expansion (char *expansion)
2409 /* We'd better not be trying to push the stack twice. */
2410 gdb_assert (! macro_original_text);
2412 /* Copy to the obstack, and then free the intermediate
2414 copy = (char *) obstack_copy0 (&expansion_obstack, expansion,
2415 strlen (expansion));
2418 /* Save the old lexptr value, so we can return to it when we're done
2419 parsing the expanded text. */
2420 macro_original_text = lexptr;
2425 scanning_macro_expansion (void)
2427 return macro_original_text != 0;
2431 finished_macro_expansion (void)
2433 /* There'd better be something to pop back to. */
2434 gdb_assert (macro_original_text);
2436 /* Pop back to the original text. */
2437 lexptr = macro_original_text;
2438 macro_original_text = 0;
2442 scan_macro_cleanup (void *dummy)
2444 if (macro_original_text)
2445 finished_macro_expansion ();
2447 obstack_free (&expansion_obstack, NULL);
2450 /* Return true iff the token represents a C++ cast operator. */
2453 is_cast_operator (const char *token, int len)
2455 return (! strncmp (token, "dynamic_cast", len)
2456 || ! strncmp (token, "static_cast", len)
2457 || ! strncmp (token, "reinterpret_cast", len)
2458 || ! strncmp (token, "const_cast", len));
2461 /* The scope used for macro expansion. */
2462 static struct macro_scope *expression_macro_scope;
2464 /* This is set if a NAME token appeared at the very end of the input
2465 string, with no whitespace separating the name from the EOF. This
2466 is used only when parsing to do field name completion. */
2467 static int saw_name_at_eof;
2469 /* This is set if the previously-returned token was a structure
2470 operator -- either '.' or ARROW. */
2471 static bool last_was_structop;
2473 /* Read one token, getting characters through lexptr. */
2476 lex_one_token (struct parser_state *par_state, bool *is_quoted_name)
2481 const char *tokstart;
2482 bool saw_structop = last_was_structop;
2485 last_was_structop = false;
2486 *is_quoted_name = false;
2490 /* Check if this is a macro invocation that we need to expand. */
2491 if (! scanning_macro_expansion ())
2493 char *expanded = macro_expand_next (&lexptr,
2494 standard_macro_lookup,
2495 expression_macro_scope);
2498 scan_macro_expansion (expanded);
2501 prev_lexptr = lexptr;
2504 /* See if it is a special token of length 3. */
2505 for (i = 0; i < sizeof tokentab3 / sizeof tokentab3[0]; i++)
2506 if (strncmp (tokstart, tokentab3[i].oper, 3) == 0)
2508 if ((tokentab3[i].flags & FLAG_CXX) != 0
2509 && parse_language (par_state)->la_language != language_cplus)
2513 yylval.opcode = tokentab3[i].opcode;
2514 return tokentab3[i].token;
2517 /* See if it is a special token of length 2. */
2518 for (i = 0; i < sizeof tokentab2 / sizeof tokentab2[0]; i++)
2519 if (strncmp (tokstart, tokentab2[i].oper, 2) == 0)
2521 if ((tokentab2[i].flags & FLAG_CXX) != 0
2522 && parse_language (par_state)->la_language != language_cplus)
2526 yylval.opcode = tokentab2[i].opcode;
2527 if (tokentab2[i].token == ARROW)
2528 last_was_structop = 1;
2529 return tokentab2[i].token;
2532 switch (c = *tokstart)
2535 /* If we were just scanning the result of a macro expansion,
2536 then we need to resume scanning the original text.
2537 If we're parsing for field name completion, and the previous
2538 token allows such completion, return a COMPLETE token.
2539 Otherwise, we were already scanning the original text, and
2540 we're really done. */
2541 if (scanning_macro_expansion ())
2543 finished_macro_expansion ();
2546 else if (saw_name_at_eof)
2548 saw_name_at_eof = 0;
2551 else if (parse_completion && saw_structop)
2566 if (parse_language (par_state)->la_language == language_objc
2573 if (paren_depth == 0)
2580 if (comma_terminates
2582 && ! scanning_macro_expansion ())
2588 /* Might be a floating point number. */
2589 if (lexptr[1] < '0' || lexptr[1] > '9')
2591 last_was_structop = true;
2592 goto symbol; /* Nope, must be a symbol. */
2607 /* It's a number. */
2608 int got_dot = 0, got_e = 0, toktype;
2609 const char *p = tokstart;
2610 int hex = input_radix > 10;
2612 if (c == '0' && (p[1] == 'x' || p[1] == 'X'))
2617 else if (c == '0' && (p[1]=='t' || p[1]=='T' || p[1]=='d' || p[1]=='D'))
2625 /* This test includes !hex because 'e' is a valid hex digit
2626 and thus does not indicate a floating point number when
2627 the radix is hex. */
2628 if (!hex && !got_e && (*p == 'e' || *p == 'E'))
2629 got_dot = got_e = 1;
2630 /* This test does not include !hex, because a '.' always indicates
2631 a decimal floating point number regardless of the radix. */
2632 else if (!got_dot && *p == '.')
2634 else if (got_e && (p[-1] == 'e' || p[-1] == 'E')
2635 && (*p == '-' || *p == '+'))
2636 /* This is the sign of the exponent, not the end of the
2639 /* We will take any letters or digits. parse_number will
2640 complain if past the radix, or if L or U are not final. */
2641 else if ((*p < '0' || *p > '9')
2642 && ((*p < 'a' || *p > 'z')
2643 && (*p < 'A' || *p > 'Z')))
2646 toktype = parse_number (par_state, tokstart, p - tokstart,
2647 got_dot|got_e, &yylval);
2648 if (toktype == ERROR)
2650 char *err_copy = (char *) alloca (p - tokstart + 1);
2652 memcpy (err_copy, tokstart, p - tokstart);
2653 err_copy[p - tokstart] = 0;
2654 error (_("Invalid number \"%s\"."), err_copy);
2662 const char *p = &tokstart[1];
2664 if (parse_language (par_state)->la_language == language_objc)
2666 size_t len = strlen ("selector");
2668 if (strncmp (p, "selector", len) == 0
2669 && (p[len] == '\0' || ISSPACE (p[len])))
2678 while (ISSPACE (*p))
2680 size_t len = strlen ("entry");
2681 if (strncmp (p, "entry", len) == 0 && !c_ident_is_alnum (p[len])
2713 if (tokstart[1] != '"' && tokstart[1] != '\'')
2722 int result = parse_string_or_char (tokstart, &lexptr, &yylval.tsval,
2727 error (_("Empty character constant."));
2728 else if (host_len > 2 && c == '\'')
2731 namelen = lexptr - tokstart - 1;
2732 *is_quoted_name = true;
2736 else if (host_len > 1)
2737 error (_("Invalid character constant."));
2743 if (!(c == '_' || c == '$' || c_ident_is_alpha (c)))
2744 /* We must have come across a bad character (e.g. ';'). */
2745 error (_("Invalid character '%c' in expression."), c);
2747 /* It's a name. See how long it is. */
2749 for (c = tokstart[namelen];
2750 (c == '_' || c == '$' || c_ident_is_alnum (c) || c == '<');)
2752 /* Template parameter lists are part of the name.
2753 FIXME: This mishandles `print $a<4&&$a>3'. */
2757 if (! is_cast_operator (tokstart, namelen))
2759 /* Scan ahead to get rest of the template specification. Note
2760 that we look ahead only when the '<' adjoins non-whitespace
2761 characters; for comparison expressions, e.g. "a < b > c",
2762 there must be spaces before the '<', etc. */
2763 const char *p = find_template_name_end (tokstart + namelen);
2766 namelen = p - tokstart;
2770 c = tokstart[++namelen];
2773 /* The token "if" terminates the expression and is NOT removed from
2774 the input stream. It doesn't count if it appears in the
2775 expansion of a macro. */
2777 && tokstart[0] == 'i'
2778 && tokstart[1] == 'f'
2779 && ! scanning_macro_expansion ())
2784 /* For the same reason (breakpoint conditions), "thread N"
2785 terminates the expression. "thread" could be an identifier, but
2786 an identifier is never followed by a number without intervening
2787 punctuation. "task" is similar. Handle abbreviations of these,
2788 similarly to breakpoint.c:find_condition_and_thread. */
2790 && (strncmp (tokstart, "thread", namelen) == 0
2791 || strncmp (tokstart, "task", namelen) == 0)
2792 && (tokstart[namelen] == ' ' || tokstart[namelen] == '\t')
2793 && ! scanning_macro_expansion ())
2795 const char *p = tokstart + namelen + 1;
2797 while (*p == ' ' || *p == '\t')
2799 if (*p >= '0' && *p <= '9')
2807 yylval.sval.ptr = tokstart;
2808 yylval.sval.length = namelen;
2810 /* Catch specific keywords. */
2811 copy = copy_name (yylval.sval);
2812 for (i = 0; i < sizeof ident_tokens / sizeof ident_tokens[0]; i++)
2813 if (strcmp (copy, ident_tokens[i].oper) == 0)
2815 if ((ident_tokens[i].flags & FLAG_CXX) != 0
2816 && parse_language (par_state)->la_language != language_cplus)
2819 if ((ident_tokens[i].flags & FLAG_SHADOW) != 0)
2821 struct field_of_this_result is_a_field_of_this;
2823 if (lookup_symbol (copy, expression_context_block,
2825 (parse_language (par_state)->la_language
2826 == language_cplus ? &is_a_field_of_this
2830 /* The keyword is shadowed. */
2835 /* It is ok to always set this, even though we don't always
2836 strictly need to. */
2837 yylval.opcode = ident_tokens[i].opcode;
2838 return ident_tokens[i].token;
2841 if (*tokstart == '$')
2844 if (parse_completion && *lexptr == '\0')
2845 saw_name_at_eof = 1;
2847 yylval.ssym.stoken = yylval.sval;
2848 yylval.ssym.sym.symbol = NULL;
2849 yylval.ssym.sym.block = NULL;
2850 yylval.ssym.is_a_field_of_this = 0;
2854 /* An object of this type is pushed on a FIFO by the "outer" lexer. */
2855 struct token_and_value
2861 /* A FIFO of tokens that have been read but not yet returned to the
2863 static std::vector<token_and_value> token_fifo;
2865 /* Non-zero if the lexer should return tokens from the FIFO. */
2868 /* Temporary storage for c_lex; this holds symbol names as they are
2870 auto_obstack name_obstack;
2872 /* Classify a NAME token. The contents of the token are in `yylval'.
2873 Updates yylval and returns the new token type. BLOCK is the block
2874 in which lookups start; this can be NULL to mean the global scope.
2875 IS_QUOTED_NAME is non-zero if the name token was originally quoted
2876 in single quotes. IS_AFTER_STRUCTOP is true if this name follows
2877 a structure operator -- either '.' or ARROW */
2880 classify_name (struct parser_state *par_state, const struct block *block,
2881 bool is_quoted_name, bool is_after_structop)
2883 struct block_symbol bsym;
2885 struct field_of_this_result is_a_field_of_this;
2887 copy = copy_name (yylval.sval);
2889 /* Initialize this in case we *don't* use it in this call; that way
2890 we can refer to it unconditionally below. */
2891 memset (&is_a_field_of_this, 0, sizeof (is_a_field_of_this));
2893 bsym = lookup_symbol (copy, block, VAR_DOMAIN,
2894 parse_language (par_state)->la_name_of_this
2895 ? &is_a_field_of_this : NULL);
2897 if (bsym.symbol && SYMBOL_CLASS (bsym.symbol) == LOC_BLOCK)
2899 yylval.ssym.sym = bsym;
2900 yylval.ssym.is_a_field_of_this = is_a_field_of_this.type != NULL;
2903 else if (!bsym.symbol)
2905 /* If we found a field of 'this', we might have erroneously
2906 found a constructor where we wanted a type name. Handle this
2907 case by noticing that we found a constructor and then look up
2908 the type tag instead. */
2909 if (is_a_field_of_this.type != NULL
2910 && is_a_field_of_this.fn_field != NULL
2911 && TYPE_FN_FIELD_CONSTRUCTOR (is_a_field_of_this.fn_field->fn_fields,
2914 struct field_of_this_result inner_is_a_field_of_this;
2916 bsym = lookup_symbol (copy, block, STRUCT_DOMAIN,
2917 &inner_is_a_field_of_this);
2918 if (bsym.symbol != NULL)
2920 yylval.tsym.type = SYMBOL_TYPE (bsym.symbol);
2925 /* If we found a field on the "this" object, or we are looking
2926 up a field on a struct, then we want to prefer it over a
2927 filename. However, if the name was quoted, then it is better
2928 to check for a filename or a block, since this is the only
2929 way the user has of requiring the extension to be used. */
2930 if ((is_a_field_of_this.type == NULL && !is_after_structop)
2933 /* See if it's a file name. */
2934 struct symtab *symtab;
2936 symtab = lookup_symtab (copy);
2939 yylval.bval = BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (symtab),
2946 if (bsym.symbol && SYMBOL_CLASS (bsym.symbol) == LOC_TYPEDEF)
2948 yylval.tsym.type = SYMBOL_TYPE (bsym.symbol);
2952 /* See if it's an ObjC classname. */
2953 if (parse_language (par_state)->la_language == language_objc && !bsym.symbol)
2955 CORE_ADDR Class = lookup_objc_class (parse_gdbarch (par_state), copy);
2960 yylval.theclass.theclass = Class;
2961 sym = lookup_struct_typedef (copy, expression_context_block, 1);
2963 yylval.theclass.type = SYMBOL_TYPE (sym);
2968 /* Input names that aren't symbols but ARE valid hex numbers, when
2969 the input radix permits them, can be names or numbers depending
2970 on the parse. Note we support radixes > 16 here. */
2972 && ((copy[0] >= 'a' && copy[0] < 'a' + input_radix - 10)
2973 || (copy[0] >= 'A' && copy[0] < 'A' + input_radix - 10)))
2975 YYSTYPE newlval; /* Its value is ignored. */
2976 int hextype = parse_number (par_state, copy, yylval.sval.length,
2981 yylval.ssym.sym = bsym;
2982 yylval.ssym.is_a_field_of_this = is_a_field_of_this.type != NULL;
2987 /* Any other kind of symbol */
2988 yylval.ssym.sym = bsym;
2989 yylval.ssym.is_a_field_of_this = is_a_field_of_this.type != NULL;
2991 if (bsym.symbol == NULL
2992 && parse_language (par_state)->la_language == language_cplus
2993 && is_a_field_of_this.type == NULL
2994 && lookup_minimal_symbol (copy, NULL, NULL).minsym == NULL)
2995 return UNKNOWN_CPP_NAME;
3000 /* Like classify_name, but used by the inner loop of the lexer, when a
3001 name might have already been seen. CONTEXT is the context type, or
3002 NULL if this is the first component of a name. */
3005 classify_inner_name (struct parser_state *par_state,
3006 const struct block *block, struct type *context)
3011 if (context == NULL)
3012 return classify_name (par_state, block, false, false);
3014 type = check_typedef (context);
3015 if (!type_aggregate_p (type))
3018 copy = copy_name (yylval.ssym.stoken);
3019 /* N.B. We assume the symbol can only be in VAR_DOMAIN. */
3020 yylval.ssym.sym = cp_lookup_nested_symbol (type, copy, block, VAR_DOMAIN);
3022 /* If no symbol was found, search for a matching base class named
3023 COPY. This will allow users to enter qualified names of class members
3024 relative to the `this' pointer. */
3025 if (yylval.ssym.sym.symbol == NULL)
3027 struct type *base_type = cp_find_type_baseclass_by_name (type, copy);
3029 if (base_type != NULL)
3031 yylval.tsym.type = base_type;
3038 switch (SYMBOL_CLASS (yylval.ssym.sym.symbol))
3042 /* cp_lookup_nested_symbol might have accidentally found a constructor
3043 named COPY when we really wanted a base class of the same name.
3044 Double-check this case by looking for a base class. */
3046 struct type *base_type = cp_find_type_baseclass_by_name (type, copy);
3048 if (base_type != NULL)
3050 yylval.tsym.type = base_type;
3057 yylval.tsym.type = SYMBOL_TYPE (yylval.ssym.sym.symbol);
3063 internal_error (__FILE__, __LINE__, _("not reached"));
3066 /* The outer level of a two-level lexer. This calls the inner lexer
3067 to return tokens. It then either returns these tokens, or
3068 aggregates them into a larger token. This lets us work around a
3069 problem in our parsing approach, where the parser could not
3070 distinguish between qualified names and qualified types at the
3073 This approach is still not ideal, because it mishandles template
3074 types. See the comment in lex_one_token for an example. However,
3075 this is still an improvement over the earlier approach, and will
3076 suffice until we move to better parsing technology. */
3081 token_and_value current;
3082 int first_was_coloncolon, last_was_coloncolon;
3083 struct type *context_type = NULL;
3084 int last_to_examine, next_to_examine, checkpoint;
3085 const struct block *search_block;
3086 bool is_quoted_name, last_lex_was_structop;
3088 if (popping && !token_fifo.empty ())
3092 last_lex_was_structop = last_was_structop;
3094 /* Read the first token and decide what to do. Most of the
3095 subsequent code is C++-only; but also depends on seeing a "::" or
3097 current.token = lex_one_token (pstate, &is_quoted_name);
3098 if (current.token == NAME)
3099 current.token = classify_name (pstate, expression_context_block,
3100 is_quoted_name, last_lex_was_structop);
3101 if (parse_language (pstate)->la_language != language_cplus
3102 || (current.token != TYPENAME && current.token != COLONCOLON
3103 && current.token != FILENAME))
3104 return current.token;
3106 /* Read any sequence of alternating "::" and name-like tokens into
3108 current.value = yylval;
3109 token_fifo.push_back (current);
3110 last_was_coloncolon = current.token == COLONCOLON;
3115 /* We ignore quoted names other than the very first one.
3116 Subsequent ones do not have any special meaning. */
3117 current.token = lex_one_token (pstate, &ignore);
3118 current.value = yylval;
3119 token_fifo.push_back (current);
3121 if ((last_was_coloncolon && current.token != NAME)
3122 || (!last_was_coloncolon && current.token != COLONCOLON))
3124 last_was_coloncolon = !last_was_coloncolon;
3128 /* We always read one extra token, so compute the number of tokens
3129 to examine accordingly. */
3130 last_to_examine = token_fifo.size () - 2;
3131 next_to_examine = 0;
3133 current = token_fifo[next_to_examine];
3136 name_obstack.clear ();
3138 if (current.token == FILENAME)
3139 search_block = current.value.bval;
3140 else if (current.token == COLONCOLON)
3141 search_block = NULL;
3144 gdb_assert (current.token == TYPENAME);
3145 search_block = expression_context_block;
3146 obstack_grow (&name_obstack, current.value.sval.ptr,
3147 current.value.sval.length);
3148 context_type = current.value.tsym.type;
3152 first_was_coloncolon = current.token == COLONCOLON;
3153 last_was_coloncolon = first_was_coloncolon;
3155 while (next_to_examine <= last_to_examine)
3157 token_and_value next;
3159 next = token_fifo[next_to_examine];
3162 if (next.token == NAME && last_was_coloncolon)
3166 yylval = next.value;
3167 classification = classify_inner_name (pstate, search_block,
3169 /* We keep going until we either run out of names, or until
3170 we have a qualified name which is not a type. */
3171 if (classification != TYPENAME && classification != NAME)
3174 /* Accept up to this token. */
3175 checkpoint = next_to_examine;
3177 /* Update the partial name we are constructing. */
3178 if (context_type != NULL)
3180 /* We don't want to put a leading "::" into the name. */
3181 obstack_grow_str (&name_obstack, "::");
3183 obstack_grow (&name_obstack, next.value.sval.ptr,
3184 next.value.sval.length);
3186 yylval.sval.ptr = (const char *) obstack_base (&name_obstack);
3187 yylval.sval.length = obstack_object_size (&name_obstack);
3188 current.value = yylval;
3189 current.token = classification;
3191 last_was_coloncolon = 0;
3193 if (classification == NAME)
3196 context_type = yylval.tsym.type;
3198 else if (next.token == COLONCOLON && !last_was_coloncolon)
3199 last_was_coloncolon = 1;
3202 /* We've reached the end of the name. */
3207 /* If we have a replacement token, install it as the first token in
3208 the FIFO, and delete the other constituent tokens. */
3211 current.value.sval.ptr
3212 = (const char *) obstack_copy0 (&expansion_obstack,
3213 current.value.sval.ptr,
3214 current.value.sval.length);
3216 token_fifo[0] = current;
3218 token_fifo.erase (token_fifo.begin () + 1,
3219 token_fifo.begin () + checkpoint);
3223 current = token_fifo[0];
3224 token_fifo.erase (token_fifo.begin ());
3225 yylval = current.value;
3226 return current.token;
3230 c_parse (struct parser_state *par_state)
3233 struct cleanup *back_to;
3235 /* Setting up the parser state. */
3236 scoped_restore pstate_restore = make_scoped_restore (&pstate);
3237 gdb_assert (par_state != NULL);
3240 gdb::unique_xmalloc_ptr<struct macro_scope> macro_scope;
3242 if (expression_context_block)
3243 macro_scope = sal_macro_scope (find_pc_line (expression_context_pc, 0));
3245 macro_scope = default_macro_scope ();
3247 macro_scope = user_macro_scope ();
3249 scoped_restore restore_macro_scope
3250 = make_scoped_restore (&expression_macro_scope, macro_scope.get ());
3252 /* Initialize macro expansion code. */
3253 obstack_init (&expansion_obstack);
3254 gdb_assert (! macro_original_text);
3255 /* Note that parsing (within yyparse) freely installs cleanups
3256 assuming they'll be run here (below). */
3257 back_to = make_cleanup (scan_macro_cleanup, 0);
3259 scoped_restore restore_yydebug = make_scoped_restore (&yydebug,
3262 /* Initialize some state used by the lexer. */
3263 last_was_structop = false;
3264 saw_name_at_eof = 0;
3266 token_fifo.clear ();
3268 name_obstack.clear ();
3270 result = yyparse ();
3271 do_cleanups (back_to);
3278 /* This is called via the YYPRINT macro when parser debugging is
3279 enabled. It prints a token's value. */
3282 c_print_token (FILE *file, int type, YYSTYPE value)
3287 parser_fprintf (file, "typed_val_int<%s, %s>",
3288 TYPE_SAFE_NAME (value.typed_val_int.type),
3289 pulongest (value.typed_val_int.val));
3295 char *copy = (char *) alloca (value.tsval.length + 1);
3297 memcpy (copy, value.tsval.ptr, value.tsval.length);
3298 copy[value.tsval.length] = '\0';
3300 parser_fprintf (file, "tsval<type=%d, %s>", value.tsval.type, copy);
3306 parser_fprintf (file, "sval<%s>", copy_name (value.sval));
3310 parser_fprintf (file, "tsym<type=%s, name=%s>",
3311 TYPE_SAFE_NAME (value.tsym.type),
3312 copy_name (value.tsym.stoken));
3316 case UNKNOWN_CPP_NAME:
3319 parser_fprintf (file, "ssym<name=%s, sym=%s, field_of_this=%d>",
3320 copy_name (value.ssym.stoken),
3321 (value.ssym.sym.symbol == NULL
3322 ? "(null)" : SYMBOL_PRINT_NAME (value.ssym.sym.symbol)),
3323 value.ssym.is_a_field_of_this);
3327 parser_fprintf (file, "bval<%s>", host_address_to_string (value.bval));
3335 yyerror (const char *msg)
3338 lexptr = prev_lexptr;
3340 error (_("A %s in expression, near `%s'."), msg, lexptr);