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 "bfd.h" /* Required by objfiles.h. */
46 #include "symfile.h" /* Required by objfiles.h. */
47 #include "objfiles.h" /* For have_full_symbols and have_partial_symbols */
50 #include "cp-support.h"
51 #include "macroscope.h"
52 #include "objc-lang.h"
53 #include "typeprint.h"
56 #define parse_type(ps) builtin_type (parse_gdbarch (ps))
58 /* Remap normal yacc parser interface names (yyparse, yylex, yyerror,
60 #define GDB_YY_REMAP_PREFIX c_
63 /* The state of the parser, used internally when we are parsing the
66 static struct parser_state *pstate = NULL;
70 static int yylex (void);
72 void yyerror (const char *);
74 static int type_aggregate_p (struct type *);
78 /* Although the yacc "value" of an expression is not used,
79 since the result is stored in the structure being created,
80 other node types do have values. */
95 struct typed_stoken tsval;
99 const struct block *bval;
100 enum exp_opcode opcode;
102 struct stoken_vector svec;
103 VEC (type_ptr) *tvec;
105 struct type_stack *type_stack;
107 struct objc_class_str theclass;
111 /* YYSTYPE gets defined by %union */
112 static int parse_number (struct parser_state *par_state,
113 const char *, int, int, YYSTYPE *);
114 static struct stoken operator_stoken (const char *);
115 static void check_parameter_typelist (VEC (type_ptr) *);
116 static void write_destructor_name (struct parser_state *par_state,
120 static void c_print_token (FILE *file, int type, YYSTYPE value);
121 #define YYPRINT(FILE, TYPE, VALUE) c_print_token (FILE, TYPE, VALUE)
125 %type <voidval> exp exp1 type_exp start variable qualified_name lcurly function_method
127 %type <tval> type typebase
128 %type <tvec> nonempty_typelist func_mod parameter_typelist
129 /* %type <bval> block */
131 /* Fancy type parsing. */
133 %type <lval> array_mod
134 %type <tval> conversion_type_id
136 %type <type_stack> ptr_operator_ts abs_decl direct_abs_decl
138 %token <typed_val_int> INT
139 %token <typed_val_float> FLOAT
141 /* Both NAME and TYPENAME tokens represent symbols in the input,
142 and both convey their data as strings.
143 But a TYPENAME is a string that happens to be defined as a typedef
144 or builtin type name (such as int or char)
145 and a NAME is any other symbol.
146 Contexts where this distinction is not important can use the
147 nonterminal "name", which matches either NAME or TYPENAME. */
149 %token <tsval> STRING
150 %token <sval> NSSTRING /* ObjC Foundation "NSString" literal */
151 %token SELECTOR /* ObjC "@selector" pseudo-operator */
153 %token <ssym> NAME /* BLOCKNAME defined below to give it higher precedence. */
154 %token <ssym> UNKNOWN_CPP_NAME
155 %token <voidval> COMPLETE
156 %token <tsym> TYPENAME
157 %token <theclass> CLASSNAME /* ObjC Class name */
159 %type <svec> string_exp
160 %type <ssym> name_not_typename
161 %type <tsym> type_name
163 /* This is like a '[' token, but is only generated when parsing
164 Objective C. This lets us reuse the same parser without
165 erroneously parsing ObjC-specific expressions in C. */
168 /* A NAME_OR_INT is a symbol which is not known in the symbol table,
169 but which would parse as a valid number in the current input radix.
170 E.g. "c" when input_radix==16. Depending on the parse, it will be
171 turned into a name or into a number. */
173 %token <ssym> NAME_OR_INT
176 %token STRUCT CLASS UNION ENUM SIZEOF UNSIGNED COLONCOLON
181 %token REINTERPRET_CAST DYNAMIC_CAST STATIC_CAST CONST_CAST
187 /* Special type cases, put in to allow the parser to distinguish different
189 %token SIGNED_KEYWORD LONG SHORT INT_KEYWORD CONST_KEYWORD VOLATILE_KEYWORD DOUBLE_KEYWORD
191 %token <sval> VARIABLE
193 %token <opcode> ASSIGN_MODIFY
202 %right '=' ASSIGN_MODIFY
210 %left '<' '>' LEQ GEQ
215 %right UNARY INCREMENT DECREMENT
216 %right ARROW ARROW_STAR '.' DOT_STAR '[' OBJC_LBRAC '('
217 %token <ssym> BLOCKNAME
218 %token <bval> FILENAME
232 { write_exp_elt_opcode(pstate, OP_TYPE);
233 write_exp_elt_type(pstate, $1);
234 write_exp_elt_opcode(pstate, OP_TYPE);}
237 write_exp_elt_opcode (pstate, OP_TYPEOF);
239 | TYPEOF '(' type ')'
241 write_exp_elt_opcode (pstate, OP_TYPE);
242 write_exp_elt_type (pstate, $3);
243 write_exp_elt_opcode (pstate, OP_TYPE);
245 | DECLTYPE '(' exp ')'
247 write_exp_elt_opcode (pstate, OP_DECLTYPE);
251 /* Expressions, including the comma operator. */
254 { write_exp_elt_opcode (pstate, BINOP_COMMA); }
257 /* Expressions, not including the comma operator. */
258 exp : '*' exp %prec UNARY
259 { write_exp_elt_opcode (pstate, UNOP_IND); }
262 exp : '&' exp %prec UNARY
263 { write_exp_elt_opcode (pstate, UNOP_ADDR); }
266 exp : '-' exp %prec UNARY
267 { write_exp_elt_opcode (pstate, UNOP_NEG); }
270 exp : '+' exp %prec UNARY
271 { write_exp_elt_opcode (pstate, UNOP_PLUS); }
274 exp : '!' exp %prec UNARY
275 { write_exp_elt_opcode (pstate, UNOP_LOGICAL_NOT); }
278 exp : '~' exp %prec UNARY
279 { write_exp_elt_opcode (pstate, UNOP_COMPLEMENT); }
282 exp : INCREMENT exp %prec UNARY
283 { write_exp_elt_opcode (pstate, UNOP_PREINCREMENT); }
286 exp : DECREMENT exp %prec UNARY
287 { write_exp_elt_opcode (pstate, UNOP_PREDECREMENT); }
290 exp : exp INCREMENT %prec UNARY
291 { write_exp_elt_opcode (pstate, UNOP_POSTINCREMENT); }
294 exp : exp DECREMENT %prec UNARY
295 { write_exp_elt_opcode (pstate, UNOP_POSTDECREMENT); }
298 exp : TYPEID '(' exp ')' %prec UNARY
299 { write_exp_elt_opcode (pstate, OP_TYPEID); }
302 exp : TYPEID '(' type_exp ')' %prec UNARY
303 { write_exp_elt_opcode (pstate, OP_TYPEID); }
306 exp : SIZEOF exp %prec UNARY
307 { write_exp_elt_opcode (pstate, UNOP_SIZEOF); }
311 { write_exp_elt_opcode (pstate, STRUCTOP_PTR);
312 write_exp_string (pstate, $3);
313 write_exp_elt_opcode (pstate, STRUCTOP_PTR); }
316 exp : exp ARROW name COMPLETE
317 { mark_struct_expression (pstate);
318 write_exp_elt_opcode (pstate, STRUCTOP_PTR);
319 write_exp_string (pstate, $3);
320 write_exp_elt_opcode (pstate, STRUCTOP_PTR); }
323 exp : exp ARROW COMPLETE
325 mark_struct_expression (pstate);
326 write_exp_elt_opcode (pstate, STRUCTOP_PTR);
329 write_exp_string (pstate, s);
330 write_exp_elt_opcode (pstate, STRUCTOP_PTR); }
333 exp : exp ARROW '~' name
334 { write_exp_elt_opcode (pstate, STRUCTOP_PTR);
335 write_destructor_name (pstate, $4);
336 write_exp_elt_opcode (pstate, STRUCTOP_PTR); }
339 exp : exp ARROW '~' name COMPLETE
340 { mark_struct_expression (pstate);
341 write_exp_elt_opcode (pstate, STRUCTOP_PTR);
342 write_destructor_name (pstate, $4);
343 write_exp_elt_opcode (pstate, STRUCTOP_PTR); }
346 exp : exp ARROW qualified_name
347 { /* exp->type::name becomes exp->*(&type::name) */
348 /* Note: this doesn't work if name is a
349 static member! FIXME */
350 write_exp_elt_opcode (pstate, UNOP_ADDR);
351 write_exp_elt_opcode (pstate, STRUCTOP_MPTR); }
354 exp : exp ARROW_STAR exp
355 { write_exp_elt_opcode (pstate, STRUCTOP_MPTR); }
359 { write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
360 write_exp_string (pstate, $3);
361 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
364 exp : exp '.' name COMPLETE
365 { mark_struct_expression (pstate);
366 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
367 write_exp_string (pstate, $3);
368 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
371 exp : exp '.' COMPLETE
373 mark_struct_expression (pstate);
374 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
377 write_exp_string (pstate, s);
378 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
381 exp : exp '.' '~' name
382 { write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
383 write_destructor_name (pstate, $4);
384 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
387 exp : exp '.' '~' name COMPLETE
388 { mark_struct_expression (pstate);
389 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
390 write_destructor_name (pstate, $4);
391 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
394 exp : exp '.' qualified_name
395 { /* exp.type::name becomes exp.*(&type::name) */
396 /* Note: this doesn't work if name is a
397 static member! FIXME */
398 write_exp_elt_opcode (pstate, UNOP_ADDR);
399 write_exp_elt_opcode (pstate, STRUCTOP_MEMBER); }
402 exp : exp DOT_STAR exp
403 { write_exp_elt_opcode (pstate, STRUCTOP_MEMBER); }
406 exp : exp '[' exp1 ']'
407 { write_exp_elt_opcode (pstate, BINOP_SUBSCRIPT); }
410 exp : exp OBJC_LBRAC exp1 ']'
411 { write_exp_elt_opcode (pstate, BINOP_SUBSCRIPT); }
415 * The rules below parse ObjC message calls of the form:
416 * '[' target selector {':' argument}* ']'
419 exp : OBJC_LBRAC TYPENAME
423 theclass = lookup_objc_class (parse_gdbarch (pstate),
424 copy_name ($2.stoken));
426 error (_("%s is not an ObjC Class"),
427 copy_name ($2.stoken));
428 write_exp_elt_opcode (pstate, OP_LONG);
429 write_exp_elt_type (pstate,
430 parse_type (pstate)->builtin_int);
431 write_exp_elt_longcst (pstate, (LONGEST) theclass);
432 write_exp_elt_opcode (pstate, OP_LONG);
436 { write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
437 end_msglist (pstate);
438 write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
442 exp : OBJC_LBRAC CLASSNAME
444 write_exp_elt_opcode (pstate, OP_LONG);
445 write_exp_elt_type (pstate,
446 parse_type (pstate)->builtin_int);
447 write_exp_elt_longcst (pstate, (LONGEST) $2.theclass);
448 write_exp_elt_opcode (pstate, OP_LONG);
452 { write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
453 end_msglist (pstate);
454 write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
461 { write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
462 end_msglist (pstate);
463 write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
468 { add_msglist(&$1, 0); }
476 msgarg : name ':' exp
477 { add_msglist(&$1, 1); }
478 | ':' exp /* Unnamed arg. */
479 { add_msglist(0, 1); }
480 | ',' exp /* Variable number of args. */
481 { add_msglist(0, 0); }
485 /* This is to save the value of arglist_len
486 being accumulated by an outer function call. */
487 { start_arglist (); }
488 arglist ')' %prec ARROW
489 { write_exp_elt_opcode (pstate, OP_FUNCALL);
490 write_exp_elt_longcst (pstate,
491 (LONGEST) end_arglist ());
492 write_exp_elt_opcode (pstate, OP_FUNCALL); }
495 /* This is here to disambiguate with the production for
496 "func()::static_var" further below, which uses
497 function_method_void. */
498 exp : exp '(' ')' %prec ARROW
500 write_exp_elt_opcode (pstate, OP_FUNCALL);
501 write_exp_elt_longcst (pstate,
502 (LONGEST) end_arglist ());
503 write_exp_elt_opcode (pstate, OP_FUNCALL); }
507 exp : UNKNOWN_CPP_NAME '('
509 /* This could potentially be a an argument defined
510 lookup function (Koenig). */
511 write_exp_elt_opcode (pstate, OP_ADL_FUNC);
512 write_exp_elt_block (pstate,
513 expression_context_block);
514 write_exp_elt_sym (pstate,
515 NULL); /* Placeholder. */
516 write_exp_string (pstate, $1.stoken);
517 write_exp_elt_opcode (pstate, OP_ADL_FUNC);
519 /* This is to save the value of arglist_len
520 being accumulated by an outer function call. */
524 arglist ')' %prec ARROW
526 write_exp_elt_opcode (pstate, OP_FUNCALL);
527 write_exp_elt_longcst (pstate,
528 (LONGEST) end_arglist ());
529 write_exp_elt_opcode (pstate, OP_FUNCALL);
534 { start_arglist (); }
544 arglist : arglist ',' exp %prec ABOVE_COMMA
548 function_method: exp '(' parameter_typelist ')' const_or_volatile
550 VEC (type_ptr) *type_list = $3;
551 struct type *type_elt;
552 LONGEST len = VEC_length (type_ptr, type_list);
554 write_exp_elt_opcode (pstate, TYPE_INSTANCE);
555 /* Save the const/volatile qualifiers as
556 recorded by the const_or_volatile
557 production's actions. */
558 write_exp_elt_longcst (pstate,
559 follow_type_instance_flags ());
560 write_exp_elt_longcst (pstate, len);
562 VEC_iterate (type_ptr, type_list, i, type_elt);
564 write_exp_elt_type (pstate, type_elt);
565 write_exp_elt_longcst(pstate, len);
566 write_exp_elt_opcode (pstate, TYPE_INSTANCE);
567 VEC_free (type_ptr, type_list);
571 function_method_void: exp '(' ')' const_or_volatile
572 { write_exp_elt_opcode (pstate, TYPE_INSTANCE);
574 write_exp_elt_longcst (pstate,
575 follow_type_instance_flags ());
576 write_exp_elt_longcst (pstate, 0);
577 write_exp_elt_longcst (pstate, 0);
578 write_exp_elt_opcode (pstate, TYPE_INSTANCE);
582 exp : function_method
585 /* Normally we must interpret "func()" as a function call, instead of
586 a type. The user needs to write func(void) to disambiguate.
587 However, in the "func()::static_var" case, there's no
589 function_method_void_or_typelist: function_method
590 | function_method_void
593 exp : function_method_void_or_typelist COLONCOLON name
595 write_exp_elt_opcode (pstate, OP_FUNC_STATIC_VAR);
596 write_exp_string (pstate, $3);
597 write_exp_elt_opcode (pstate, OP_FUNC_STATIC_VAR);
602 { $$ = end_arglist () - 1; }
604 exp : lcurly arglist rcurly %prec ARROW
605 { write_exp_elt_opcode (pstate, OP_ARRAY);
606 write_exp_elt_longcst (pstate, (LONGEST) 0);
607 write_exp_elt_longcst (pstate, (LONGEST) $3);
608 write_exp_elt_opcode (pstate, OP_ARRAY); }
611 exp : lcurly type_exp rcurly exp %prec UNARY
612 { write_exp_elt_opcode (pstate, UNOP_MEMVAL_TYPE); }
615 exp : '(' type_exp ')' exp %prec UNARY
616 { write_exp_elt_opcode (pstate, UNOP_CAST_TYPE); }
623 /* Binary operators in order of decreasing precedence. */
626 { write_exp_elt_opcode (pstate, BINOP_REPEAT); }
630 { write_exp_elt_opcode (pstate, BINOP_MUL); }
634 { write_exp_elt_opcode (pstate, BINOP_DIV); }
638 { write_exp_elt_opcode (pstate, BINOP_REM); }
642 { write_exp_elt_opcode (pstate, BINOP_ADD); }
646 { write_exp_elt_opcode (pstate, BINOP_SUB); }
650 { write_exp_elt_opcode (pstate, BINOP_LSH); }
654 { write_exp_elt_opcode (pstate, BINOP_RSH); }
658 { write_exp_elt_opcode (pstate, BINOP_EQUAL); }
661 exp : exp NOTEQUAL exp
662 { write_exp_elt_opcode (pstate, BINOP_NOTEQUAL); }
666 { write_exp_elt_opcode (pstate, BINOP_LEQ); }
670 { write_exp_elt_opcode (pstate, BINOP_GEQ); }
674 { write_exp_elt_opcode (pstate, BINOP_LESS); }
678 { write_exp_elt_opcode (pstate, BINOP_GTR); }
682 { write_exp_elt_opcode (pstate, BINOP_BITWISE_AND); }
686 { write_exp_elt_opcode (pstate, BINOP_BITWISE_XOR); }
690 { write_exp_elt_opcode (pstate, BINOP_BITWISE_IOR); }
694 { write_exp_elt_opcode (pstate, BINOP_LOGICAL_AND); }
698 { write_exp_elt_opcode (pstate, BINOP_LOGICAL_OR); }
701 exp : exp '?' exp ':' exp %prec '?'
702 { write_exp_elt_opcode (pstate, TERNOP_COND); }
706 { write_exp_elt_opcode (pstate, BINOP_ASSIGN); }
709 exp : exp ASSIGN_MODIFY exp
710 { write_exp_elt_opcode (pstate, BINOP_ASSIGN_MODIFY);
711 write_exp_elt_opcode (pstate, $2);
712 write_exp_elt_opcode (pstate,
713 BINOP_ASSIGN_MODIFY); }
717 { write_exp_elt_opcode (pstate, OP_LONG);
718 write_exp_elt_type (pstate, $1.type);
719 write_exp_elt_longcst (pstate, (LONGEST) ($1.val));
720 write_exp_elt_opcode (pstate, OP_LONG); }
725 struct stoken_vector vec;
728 write_exp_string_vector (pstate, $1.type, &vec);
734 parse_number (pstate, $1.stoken.ptr,
735 $1.stoken.length, 0, &val);
736 write_exp_elt_opcode (pstate, OP_LONG);
737 write_exp_elt_type (pstate, val.typed_val_int.type);
738 write_exp_elt_longcst (pstate,
739 (LONGEST) val.typed_val_int.val);
740 write_exp_elt_opcode (pstate, OP_LONG);
746 { write_exp_elt_opcode (pstate, OP_FLOAT);
747 write_exp_elt_type (pstate, $1.type);
748 write_exp_elt_floatcst (pstate, $1.val);
749 write_exp_elt_opcode (pstate, OP_FLOAT); }
757 write_dollar_variable (pstate, $1);
761 exp : SELECTOR '(' name ')'
763 write_exp_elt_opcode (pstate, OP_OBJC_SELECTOR);
764 write_exp_string (pstate, $3);
765 write_exp_elt_opcode (pstate, OP_OBJC_SELECTOR); }
768 exp : SIZEOF '(' type ')' %prec UNARY
769 { struct type *type = $3;
770 write_exp_elt_opcode (pstate, OP_LONG);
771 write_exp_elt_type (pstate, lookup_signed_typename
772 (parse_language (pstate),
773 parse_gdbarch (pstate),
775 type = check_typedef (type);
777 /* $5.3.3/2 of the C++ Standard (n3290 draft)
778 says of sizeof: "When applied to a reference
779 or a reference type, the result is the size of
780 the referenced type." */
781 if (TYPE_IS_REFERENCE (type))
782 type = check_typedef (TYPE_TARGET_TYPE (type));
783 write_exp_elt_longcst (pstate,
784 (LONGEST) TYPE_LENGTH (type));
785 write_exp_elt_opcode (pstate, OP_LONG); }
788 exp : REINTERPRET_CAST '<' type_exp '>' '(' exp ')' %prec UNARY
789 { write_exp_elt_opcode (pstate,
790 UNOP_REINTERPRET_CAST); }
793 exp : STATIC_CAST '<' type_exp '>' '(' exp ')' %prec UNARY
794 { write_exp_elt_opcode (pstate, UNOP_CAST_TYPE); }
797 exp : DYNAMIC_CAST '<' type_exp '>' '(' exp ')' %prec UNARY
798 { write_exp_elt_opcode (pstate, UNOP_DYNAMIC_CAST); }
801 exp : CONST_CAST '<' type_exp '>' '(' exp ')' %prec UNARY
802 { /* We could do more error checking here, but
803 it doesn't seem worthwhile. */
804 write_exp_elt_opcode (pstate, UNOP_CAST_TYPE); }
810 /* We copy the string here, and not in the
811 lexer, to guarantee that we do not leak a
812 string. Note that we follow the
813 NUL-termination convention of the
815 struct typed_stoken *vec = XNEW (struct typed_stoken);
820 vec->length = $1.length;
821 vec->ptr = (char *) malloc ($1.length + 1);
822 memcpy (vec->ptr, $1.ptr, $1.length + 1);
827 /* Note that we NUL-terminate here, but just
831 $$.tokens = XRESIZEVEC (struct typed_stoken,
834 p = (char *) malloc ($2.length + 1);
835 memcpy (p, $2.ptr, $2.length + 1);
837 $$.tokens[$$.len - 1].type = $2.type;
838 $$.tokens[$$.len - 1].length = $2.length;
839 $$.tokens[$$.len - 1].ptr = p;
846 c_string_type type = C_STRING;
848 for (i = 0; i < $1.len; ++i)
850 switch ($1.tokens[i].type)
858 && type != $1.tokens[i].type)
859 error (_("Undefined string concatenation."));
860 type = (enum c_string_type_values) $1.tokens[i].type;
864 internal_error (__FILE__, __LINE__,
865 "unrecognized type in string concatenation");
869 write_exp_string_vector (pstate, type, &$1);
870 for (i = 0; i < $1.len; ++i)
871 free ($1.tokens[i].ptr);
876 exp : NSSTRING /* ObjC NextStep NSString constant
877 * of the form '@' '"' string '"'.
879 { write_exp_elt_opcode (pstate, OP_OBJC_NSSTRING);
880 write_exp_string (pstate, $1);
881 write_exp_elt_opcode (pstate, OP_OBJC_NSSTRING); }
886 { write_exp_elt_opcode (pstate, OP_LONG);
887 write_exp_elt_type (pstate,
888 parse_type (pstate)->builtin_bool);
889 write_exp_elt_longcst (pstate, (LONGEST) 1);
890 write_exp_elt_opcode (pstate, OP_LONG); }
894 { write_exp_elt_opcode (pstate, OP_LONG);
895 write_exp_elt_type (pstate,
896 parse_type (pstate)->builtin_bool);
897 write_exp_elt_longcst (pstate, (LONGEST) 0);
898 write_exp_elt_opcode (pstate, OP_LONG); }
906 $$ = SYMBOL_BLOCK_VALUE ($1.sym.symbol);
908 error (_("No file or function \"%s\"."),
909 copy_name ($1.stoken));
917 block : block COLONCOLON name
919 = lookup_symbol (copy_name ($3), $1,
920 VAR_DOMAIN, NULL).symbol;
922 if (!tem || SYMBOL_CLASS (tem) != LOC_BLOCK)
923 error (_("No function \"%s\" in specified context."),
925 $$ = SYMBOL_BLOCK_VALUE (tem); }
928 variable: name_not_typename ENTRY
929 { struct symbol *sym = $1.sym.symbol;
931 if (sym == NULL || !SYMBOL_IS_ARGUMENT (sym)
932 || !symbol_read_needs_frame (sym))
933 error (_("@entry can be used only for function "
934 "parameters, not for \"%s\""),
935 copy_name ($1.stoken));
937 write_exp_elt_opcode (pstate, OP_VAR_ENTRY_VALUE);
938 write_exp_elt_sym (pstate, sym);
939 write_exp_elt_opcode (pstate, OP_VAR_ENTRY_VALUE);
943 variable: block COLONCOLON name
944 { struct block_symbol sym
945 = lookup_symbol (copy_name ($3), $1,
949 error (_("No symbol \"%s\" in specified context."),
951 if (symbol_read_needs_frame (sym.symbol))
953 if (innermost_block == 0
954 || contained_in (sym.block,
956 innermost_block = sym.block;
959 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
960 write_exp_elt_block (pstate, sym.block);
961 write_exp_elt_sym (pstate, sym.symbol);
962 write_exp_elt_opcode (pstate, OP_VAR_VALUE); }
965 qualified_name: TYPENAME COLONCOLON name
967 struct type *type = $1.type;
968 type = check_typedef (type);
969 if (!type_aggregate_p (type))
970 error (_("`%s' is not defined as an aggregate type."),
971 TYPE_SAFE_NAME (type));
973 write_exp_elt_opcode (pstate, OP_SCOPE);
974 write_exp_elt_type (pstate, type);
975 write_exp_string (pstate, $3);
976 write_exp_elt_opcode (pstate, OP_SCOPE);
978 | TYPENAME COLONCOLON '~' name
980 struct type *type = $1.type;
981 struct stoken tmp_token;
984 type = check_typedef (type);
985 if (!type_aggregate_p (type))
986 error (_("`%s' is not defined as an aggregate type."),
987 TYPE_SAFE_NAME (type));
988 buf = (char *) alloca ($4.length + 2);
990 tmp_token.length = $4.length + 1;
992 memcpy (buf+1, $4.ptr, $4.length);
993 buf[tmp_token.length] = 0;
995 /* Check for valid destructor name. */
996 destructor_name_p (tmp_token.ptr, $1.type);
997 write_exp_elt_opcode (pstate, OP_SCOPE);
998 write_exp_elt_type (pstate, type);
999 write_exp_string (pstate, tmp_token);
1000 write_exp_elt_opcode (pstate, OP_SCOPE);
1002 | TYPENAME COLONCOLON name COLONCOLON name
1004 char *copy = copy_name ($3);
1005 error (_("No type \"%s\" within class "
1006 "or namespace \"%s\"."),
1007 copy, TYPE_SAFE_NAME ($1.type));
1011 variable: qualified_name
1012 | COLONCOLON name_not_typename
1014 char *name = copy_name ($2.stoken);
1016 struct bound_minimal_symbol msymbol;
1019 = lookup_symbol (name, (const struct block *) NULL,
1020 VAR_DOMAIN, NULL).symbol;
1023 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1024 write_exp_elt_block (pstate, NULL);
1025 write_exp_elt_sym (pstate, sym);
1026 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1030 msymbol = lookup_bound_minimal_symbol (name);
1031 if (msymbol.minsym != NULL)
1032 write_exp_msymbol (pstate, msymbol);
1033 else if (!have_full_symbols () && !have_partial_symbols ())
1034 error (_("No symbol table is loaded. Use the \"file\" command."));
1036 error (_("No symbol \"%s\" in current context."), name);
1040 variable: name_not_typename
1041 { struct block_symbol sym = $1.sym;
1045 if (symbol_read_needs_frame (sym.symbol))
1047 if (innermost_block == 0
1048 || contained_in (sym.block,
1050 innermost_block = sym.block;
1053 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1054 write_exp_elt_block (pstate, sym.block);
1055 write_exp_elt_sym (pstate, sym.symbol);
1056 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1058 else if ($1.is_a_field_of_this)
1060 /* C++: it hangs off of `this'. Must
1061 not inadvertently convert from a method call
1063 if (innermost_block == 0
1064 || contained_in (sym.block,
1066 innermost_block = sym.block;
1067 write_exp_elt_opcode (pstate, OP_THIS);
1068 write_exp_elt_opcode (pstate, OP_THIS);
1069 write_exp_elt_opcode (pstate, STRUCTOP_PTR);
1070 write_exp_string (pstate, $1.stoken);
1071 write_exp_elt_opcode (pstate, STRUCTOP_PTR);
1075 char *arg = copy_name ($1.stoken);
1077 bound_minimal_symbol msymbol
1078 = lookup_bound_minimal_symbol (arg);
1079 if (msymbol.minsym == NULL)
1081 if (!have_full_symbols () && !have_partial_symbols ())
1082 error (_("No symbol table is loaded. Use the \"file\" command."));
1084 error (_("No symbol \"%s\" in current context."),
1085 copy_name ($1.stoken));
1088 /* This minsym might be an alias for
1089 another function. See if we can find
1090 the debug symbol for the target, and
1091 if so, use it instead, since it has
1092 return type / prototype info. This
1093 is important for example for "p
1094 *__errno_location()". */
1095 symbol *alias_target
1096 = find_function_alias_target (msymbol);
1097 if (alias_target != NULL)
1099 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1101 (pstate, SYMBOL_BLOCK_VALUE (alias_target));
1102 write_exp_elt_sym (pstate, alias_target);
1103 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1106 write_exp_msymbol (pstate, msymbol);
1111 space_identifier : '@' NAME
1112 { insert_type_address_space (pstate, copy_name ($2.stoken)); }
1115 const_or_volatile: const_or_volatile_noopt
1119 cv_with_space_id : const_or_volatile space_identifier const_or_volatile
1122 const_or_volatile_or_space_identifier_noopt: cv_with_space_id
1123 | const_or_volatile_noopt
1126 const_or_volatile_or_space_identifier:
1127 const_or_volatile_or_space_identifier_noopt
1133 { insert_type (tp_pointer); }
1134 const_or_volatile_or_space_identifier
1136 { insert_type (tp_pointer); }
1137 const_or_volatile_or_space_identifier
1139 { insert_type (tp_reference); }
1141 { insert_type (tp_reference); }
1143 { insert_type (tp_rvalue_reference); }
1144 | ANDAND ptr_operator
1145 { insert_type (tp_rvalue_reference); }
1148 ptr_operator_ts: ptr_operator
1150 $$ = get_type_stack ();
1151 /* This cleanup is eventually run by
1153 make_cleanup (type_stack_cleanup, $$);
1157 abs_decl: ptr_operator_ts direct_abs_decl
1158 { $$ = append_type_stack ($2, $1); }
1163 direct_abs_decl: '(' abs_decl ')'
1165 | direct_abs_decl array_mod
1167 push_type_stack ($1);
1169 push_type (tp_array);
1170 $$ = get_type_stack ();
1175 push_type (tp_array);
1176 $$ = get_type_stack ();
1179 | direct_abs_decl func_mod
1181 push_type_stack ($1);
1183 $$ = get_type_stack ();
1188 $$ = get_type_stack ();
1198 | OBJC_LBRAC INT ']'
1204 | '(' parameter_typelist ')'
1208 /* We used to try to recognize pointer to member types here, but
1209 that didn't work (shift/reduce conflicts meant that these rules never
1210 got executed). The problem is that
1211 int (foo::bar::baz::bizzle)
1212 is a function type but
1213 int (foo::bar::baz::bizzle::*)
1214 is a pointer to member type. Stroustrup loses again! */
1219 typebase /* Implements (approximately): (type-qualifier)* type-specifier */
1223 { $$ = lookup_signed_typename (parse_language (pstate),
1224 parse_gdbarch (pstate),
1227 { $$ = lookup_signed_typename (parse_language (pstate),
1228 parse_gdbarch (pstate),
1231 { $$ = lookup_signed_typename (parse_language (pstate),
1232 parse_gdbarch (pstate),
1235 { $$ = lookup_signed_typename (parse_language (pstate),
1236 parse_gdbarch (pstate),
1238 | LONG SIGNED_KEYWORD INT_KEYWORD
1239 { $$ = lookup_signed_typename (parse_language (pstate),
1240 parse_gdbarch (pstate),
1242 | LONG SIGNED_KEYWORD
1243 { $$ = lookup_signed_typename (parse_language (pstate),
1244 parse_gdbarch (pstate),
1246 | SIGNED_KEYWORD LONG INT_KEYWORD
1247 { $$ = lookup_signed_typename (parse_language (pstate),
1248 parse_gdbarch (pstate),
1250 | UNSIGNED LONG INT_KEYWORD
1251 { $$ = lookup_unsigned_typename (parse_language (pstate),
1252 parse_gdbarch (pstate),
1254 | LONG UNSIGNED INT_KEYWORD
1255 { $$ = lookup_unsigned_typename (parse_language (pstate),
1256 parse_gdbarch (pstate),
1259 { $$ = lookup_unsigned_typename (parse_language (pstate),
1260 parse_gdbarch (pstate),
1263 { $$ = lookup_signed_typename (parse_language (pstate),
1264 parse_gdbarch (pstate),
1266 | LONG LONG INT_KEYWORD
1267 { $$ = lookup_signed_typename (parse_language (pstate),
1268 parse_gdbarch (pstate),
1270 | LONG LONG SIGNED_KEYWORD INT_KEYWORD
1271 { $$ = lookup_signed_typename (parse_language (pstate),
1272 parse_gdbarch (pstate),
1274 | LONG LONG SIGNED_KEYWORD
1275 { $$ = lookup_signed_typename (parse_language (pstate),
1276 parse_gdbarch (pstate),
1278 | SIGNED_KEYWORD LONG LONG
1279 { $$ = lookup_signed_typename (parse_language (pstate),
1280 parse_gdbarch (pstate),
1282 | SIGNED_KEYWORD LONG LONG INT_KEYWORD
1283 { $$ = lookup_signed_typename (parse_language (pstate),
1284 parse_gdbarch (pstate),
1286 | UNSIGNED LONG LONG
1287 { $$ = lookup_unsigned_typename (parse_language (pstate),
1288 parse_gdbarch (pstate),
1290 | UNSIGNED LONG LONG INT_KEYWORD
1291 { $$ = lookup_unsigned_typename (parse_language (pstate),
1292 parse_gdbarch (pstate),
1294 | LONG LONG UNSIGNED
1295 { $$ = lookup_unsigned_typename (parse_language (pstate),
1296 parse_gdbarch (pstate),
1298 | LONG LONG UNSIGNED INT_KEYWORD
1299 { $$ = lookup_unsigned_typename (parse_language (pstate),
1300 parse_gdbarch (pstate),
1303 { $$ = lookup_signed_typename (parse_language (pstate),
1304 parse_gdbarch (pstate),
1306 | SHORT SIGNED_KEYWORD INT_KEYWORD
1307 { $$ = lookup_signed_typename (parse_language (pstate),
1308 parse_gdbarch (pstate),
1310 | SHORT SIGNED_KEYWORD
1311 { $$ = lookup_signed_typename (parse_language (pstate),
1312 parse_gdbarch (pstate),
1314 | UNSIGNED SHORT INT_KEYWORD
1315 { $$ = lookup_unsigned_typename (parse_language (pstate),
1316 parse_gdbarch (pstate),
1319 { $$ = lookup_unsigned_typename (parse_language (pstate),
1320 parse_gdbarch (pstate),
1322 | SHORT UNSIGNED INT_KEYWORD
1323 { $$ = lookup_unsigned_typename (parse_language (pstate),
1324 parse_gdbarch (pstate),
1327 { $$ = lookup_typename (parse_language (pstate),
1328 parse_gdbarch (pstate),
1330 (struct block *) NULL,
1332 | LONG DOUBLE_KEYWORD
1333 { $$ = lookup_typename (parse_language (pstate),
1334 parse_gdbarch (pstate),
1336 (struct block *) NULL,
1339 { $$ = lookup_struct (copy_name ($2),
1340 expression_context_block); }
1343 mark_completion_tag (TYPE_CODE_STRUCT, "", 0);
1346 | STRUCT name COMPLETE
1348 mark_completion_tag (TYPE_CODE_STRUCT, $2.ptr,
1353 { $$ = lookup_struct (copy_name ($2),
1354 expression_context_block); }
1357 mark_completion_tag (TYPE_CODE_STRUCT, "", 0);
1360 | CLASS name COMPLETE
1362 mark_completion_tag (TYPE_CODE_STRUCT, $2.ptr,
1367 { $$ = lookup_union (copy_name ($2),
1368 expression_context_block); }
1371 mark_completion_tag (TYPE_CODE_UNION, "", 0);
1374 | UNION name COMPLETE
1376 mark_completion_tag (TYPE_CODE_UNION, $2.ptr,
1381 { $$ = lookup_enum (copy_name ($2),
1382 expression_context_block); }
1385 mark_completion_tag (TYPE_CODE_ENUM, "", 0);
1388 | ENUM name COMPLETE
1390 mark_completion_tag (TYPE_CODE_ENUM, $2.ptr,
1394 | UNSIGNED type_name
1395 { $$ = lookup_unsigned_typename (parse_language (pstate),
1396 parse_gdbarch (pstate),
1397 TYPE_NAME($2.type)); }
1399 { $$ = lookup_unsigned_typename (parse_language (pstate),
1400 parse_gdbarch (pstate),
1402 | SIGNED_KEYWORD type_name
1403 { $$ = lookup_signed_typename (parse_language (pstate),
1404 parse_gdbarch (pstate),
1405 TYPE_NAME($2.type)); }
1407 { $$ = lookup_signed_typename (parse_language (pstate),
1408 parse_gdbarch (pstate),
1410 /* It appears that this rule for templates is never
1411 reduced; template recognition happens by lookahead
1412 in the token processing code in yylex. */
1413 | TEMPLATE name '<' type '>'
1414 { $$ = lookup_template_type(copy_name($2), $4,
1415 expression_context_block);
1417 | const_or_volatile_or_space_identifier_noopt typebase
1418 { $$ = follow_types ($2); }
1419 | typebase const_or_volatile_or_space_identifier_noopt
1420 { $$ = follow_types ($1); }
1426 $$.stoken.ptr = "int";
1427 $$.stoken.length = 3;
1428 $$.type = lookup_signed_typename (parse_language (pstate),
1429 parse_gdbarch (pstate),
1434 $$.stoken.ptr = "long";
1435 $$.stoken.length = 4;
1436 $$.type = lookup_signed_typename (parse_language (pstate),
1437 parse_gdbarch (pstate),
1442 $$.stoken.ptr = "short";
1443 $$.stoken.length = 5;
1444 $$.type = lookup_signed_typename (parse_language (pstate),
1445 parse_gdbarch (pstate),
1452 { check_parameter_typelist ($1); }
1453 | nonempty_typelist ',' DOTDOTDOT
1455 VEC_safe_push (type_ptr, $1, NULL);
1456 check_parameter_typelist ($1);
1464 VEC (type_ptr) *typelist = NULL;
1465 VEC_safe_push (type_ptr, typelist, $1);
1468 | nonempty_typelist ',' type
1470 VEC_safe_push (type_ptr, $1, $3);
1478 push_type_stack ($2);
1479 $$ = follow_types ($1);
1483 conversion_type_id: typebase conversion_declarator
1484 { $$ = follow_types ($1); }
1487 conversion_declarator: /* Nothing. */
1488 | ptr_operator conversion_declarator
1491 const_and_volatile: CONST_KEYWORD VOLATILE_KEYWORD
1492 | VOLATILE_KEYWORD CONST_KEYWORD
1495 const_or_volatile_noopt: const_and_volatile
1496 { insert_type (tp_const);
1497 insert_type (tp_volatile);
1500 { insert_type (tp_const); }
1502 { insert_type (tp_volatile); }
1506 { $$ = operator_stoken (" new"); }
1508 { $$ = operator_stoken (" delete"); }
1509 | OPERATOR NEW '[' ']'
1510 { $$ = operator_stoken (" new[]"); }
1511 | OPERATOR DELETE '[' ']'
1512 { $$ = operator_stoken (" delete[]"); }
1513 | OPERATOR NEW OBJC_LBRAC ']'
1514 { $$ = operator_stoken (" new[]"); }
1515 | OPERATOR DELETE OBJC_LBRAC ']'
1516 { $$ = operator_stoken (" delete[]"); }
1518 { $$ = operator_stoken ("+"); }
1520 { $$ = operator_stoken ("-"); }
1522 { $$ = operator_stoken ("*"); }
1524 { $$ = operator_stoken ("/"); }
1526 { $$ = 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 (">"); }
1543 | OPERATOR ASSIGN_MODIFY
1544 { const char *op = " unknown";
1568 case BINOP_BITWISE_IOR:
1571 case BINOP_BITWISE_AND:
1574 case BINOP_BITWISE_XOR:
1581 $$ = operator_stoken (op);
1584 { $$ = operator_stoken ("<<"); }
1586 { $$ = operator_stoken (">>"); }
1588 { $$ = operator_stoken ("=="); }
1590 { $$ = operator_stoken ("!="); }
1592 { $$ = operator_stoken ("<="); }
1594 { $$ = operator_stoken (">="); }
1596 { $$ = operator_stoken ("&&"); }
1598 { $$ = operator_stoken ("||"); }
1599 | OPERATOR INCREMENT
1600 { $$ = operator_stoken ("++"); }
1601 | OPERATOR DECREMENT
1602 { $$ = operator_stoken ("--"); }
1604 { $$ = operator_stoken (","); }
1605 | OPERATOR ARROW_STAR
1606 { $$ = operator_stoken ("->*"); }
1608 { $$ = operator_stoken ("->"); }
1610 { $$ = operator_stoken ("()"); }
1612 { $$ = operator_stoken ("[]"); }
1613 | OPERATOR OBJC_LBRAC ']'
1614 { $$ = operator_stoken ("[]"); }
1615 | OPERATOR conversion_type_id
1618 c_print_type ($2, NULL, &buf, -1, 0,
1619 &type_print_raw_options);
1621 /* This also needs canonicalization. */
1623 = cp_canonicalize_string (buf.c_str ());
1625 canon = std::move (buf.string ());
1626 $$ = operator_stoken ((" " + canon).c_str ());
1632 name : NAME { $$ = $1.stoken; }
1633 | BLOCKNAME { $$ = $1.stoken; }
1634 | TYPENAME { $$ = $1.stoken; }
1635 | NAME_OR_INT { $$ = $1.stoken; }
1636 | UNKNOWN_CPP_NAME { $$ = $1.stoken; }
1640 name_not_typename : NAME
1642 /* These would be useful if name_not_typename was useful, but it is just
1643 a fake for "variable", so these cause reduce/reduce conflicts because
1644 the parser can't tell whether NAME_OR_INT is a name_not_typename (=variable,
1645 =exp) or just an exp. If name_not_typename was ever used in an lvalue
1646 context where only a name could occur, this might be useful.
1651 struct field_of_this_result is_a_field_of_this;
1654 $$.sym = lookup_symbol ($1.ptr,
1655 expression_context_block,
1657 &is_a_field_of_this);
1658 $$.is_a_field_of_this
1659 = is_a_field_of_this.type != NULL;
1666 /* Like write_exp_string, but prepends a '~'. */
1669 write_destructor_name (struct parser_state *par_state, struct stoken token)
1671 char *copy = (char *) alloca (token.length + 1);
1674 memcpy (©[1], token.ptr, token.length);
1679 write_exp_string (par_state, token);
1682 /* Returns a stoken of the operator name given by OP (which does not
1683 include the string "operator"). */
1685 static struct stoken
1686 operator_stoken (const char *op)
1688 struct stoken st = { NULL, 0 };
1691 st.length = CP_OPERATOR_LEN + strlen (op);
1692 buf = (char *) malloc (st.length + 1);
1693 strcpy (buf, CP_OPERATOR_STR);
1697 /* The toplevel (c_parse) will free the memory allocated here. */
1698 make_cleanup (free, buf);
1702 /* Return true if the type is aggregate-like. */
1705 type_aggregate_p (struct type *type)
1707 return (TYPE_CODE (type) == TYPE_CODE_STRUCT
1708 || TYPE_CODE (type) == TYPE_CODE_UNION
1709 || TYPE_CODE (type) == TYPE_CODE_NAMESPACE
1710 || (TYPE_CODE (type) == TYPE_CODE_ENUM
1711 && TYPE_DECLARED_CLASS (type)));
1714 /* Validate a parameter typelist. */
1717 check_parameter_typelist (VEC (type_ptr) *params)
1722 for (ix = 0; VEC_iterate (type_ptr, params, ix, type); ++ix)
1724 if (type != NULL && TYPE_CODE (check_typedef (type)) == TYPE_CODE_VOID)
1728 if (VEC_length (type_ptr, params) == 1)
1733 VEC_free (type_ptr, params);
1734 error (_("parameter types following 'void'"));
1738 VEC_free (type_ptr, params);
1739 error (_("'void' invalid as parameter type"));
1745 /* Take care of parsing a number (anything that starts with a digit).
1746 Set yylval and return the token type; update lexptr.
1747 LEN is the number of characters in it. */
1749 /*** Needs some error checking for the float case ***/
1752 parse_number (struct parser_state *par_state,
1753 const char *buf, int len, int parsed_float, YYSTYPE *putithere)
1755 /* FIXME: Shouldn't these be unsigned? We don't deal with negative values
1756 here, and we do kind of silly things like cast to unsigned. */
1763 int base = input_radix;
1766 /* Number of "L" suffixes encountered. */
1769 /* We have found a "L" or "U" suffix. */
1770 int found_suffix = 0;
1773 struct type *signed_type;
1774 struct type *unsigned_type;
1777 p = (char *) alloca (len);
1778 memcpy (p, buf, len);
1782 /* Handle suffixes for decimal floating-point: "df", "dd" or "dl". */
1783 if (len >= 2 && p[len - 2] == 'd' && p[len - 1] == 'f')
1785 putithere->typed_val_float.type
1786 = parse_type (par_state)->builtin_decfloat;
1789 else if (len >= 2 && p[len - 2] == 'd' && p[len - 1] == 'd')
1791 putithere->typed_val_float.type
1792 = parse_type (par_state)->builtin_decdouble;
1795 else if (len >= 2 && p[len - 2] == 'd' && p[len - 1] == 'l')
1797 putithere->typed_val_float.type
1798 = parse_type (par_state)->builtin_declong;
1801 /* Handle suffixes: 'f' for float, 'l' for long double. */
1802 else if (len >= 1 && tolower (p[len - 1]) == 'f')
1804 putithere->typed_val_float.type
1805 = parse_type (par_state)->builtin_float;
1808 else if (len >= 1 && tolower (p[len - 1]) == 'l')
1810 putithere->typed_val_float.type
1811 = parse_type (par_state)->builtin_long_double;
1814 /* Default type for floating-point literals is double. */
1817 putithere->typed_val_float.type
1818 = parse_type (par_state)->builtin_double;
1821 if (!parse_float (p, len,
1822 putithere->typed_val_float.type,
1823 putithere->typed_val_float.val))
1828 /* Handle base-switching prefixes 0x, 0t, 0d, 0 */
1829 if (p[0] == '0' && len > 1)
1872 if (c >= 'A' && c <= 'Z')
1874 if (c != 'l' && c != 'u')
1876 if (c >= '0' && c <= '9')
1884 if (base > 10 && c >= 'a' && c <= 'f')
1888 n += i = c - 'a' + 10;
1901 return ERROR; /* Char not a digit */
1904 return ERROR; /* Invalid digit in this base */
1906 /* Portably test for overflow (only works for nonzero values, so make
1907 a second check for zero). FIXME: Can't we just make n and prevn
1908 unsigned and avoid this? */
1909 if (c != 'l' && c != 'u' && (prevn >= n) && n != 0)
1910 unsigned_p = 1; /* Try something unsigned */
1912 /* Portably test for unsigned overflow.
1913 FIXME: This check is wrong; for example it doesn't find overflow
1914 on 0x123456789 when LONGEST is 32 bits. */
1915 if (c != 'l' && c != 'u' && n != 0)
1917 if ((unsigned_p && (ULONGEST) prevn >= (ULONGEST) n))
1918 error (_("Numeric constant too large."));
1923 /* An integer constant is an int, a long, or a long long. An L
1924 suffix forces it to be long; an LL suffix forces it to be long
1925 long. If not forced to a larger size, it gets the first type of
1926 the above that it fits in. To figure out whether it fits, we
1927 shift it right and see whether anything remains. Note that we
1928 can't shift sizeof (LONGEST) * HOST_CHAR_BIT bits or more in one
1929 operation, because many compilers will warn about such a shift
1930 (which always produces a zero result). Sometimes gdbarch_int_bit
1931 or gdbarch_long_bit will be that big, sometimes not. To deal with
1932 the case where it is we just always shift the value more than
1933 once, with fewer bits each time. */
1935 un = (ULONGEST)n >> 2;
1937 && (un >> (gdbarch_int_bit (parse_gdbarch (par_state)) - 2)) == 0)
1940 = ((ULONGEST)1) << (gdbarch_int_bit (parse_gdbarch (par_state)) - 1);
1942 /* A large decimal (not hex or octal) constant (between INT_MAX
1943 and UINT_MAX) is a long or unsigned long, according to ANSI,
1944 never an unsigned int, but this code treats it as unsigned
1945 int. This probably should be fixed. GCC gives a warning on
1948 unsigned_type = parse_type (par_state)->builtin_unsigned_int;
1949 signed_type = parse_type (par_state)->builtin_int;
1951 else if (long_p <= 1
1952 && (un >> (gdbarch_long_bit (parse_gdbarch (par_state)) - 2)) == 0)
1955 = ((ULONGEST)1) << (gdbarch_long_bit (parse_gdbarch (par_state)) - 1);
1956 unsigned_type = parse_type (par_state)->builtin_unsigned_long;
1957 signed_type = parse_type (par_state)->builtin_long;
1962 if (sizeof (ULONGEST) * HOST_CHAR_BIT
1963 < gdbarch_long_long_bit (parse_gdbarch (par_state)))
1964 /* A long long does not fit in a LONGEST. */
1965 shift = (sizeof (ULONGEST) * HOST_CHAR_BIT - 1);
1967 shift = (gdbarch_long_long_bit (parse_gdbarch (par_state)) - 1);
1968 high_bit = (ULONGEST) 1 << shift;
1969 unsigned_type = parse_type (par_state)->builtin_unsigned_long_long;
1970 signed_type = parse_type (par_state)->builtin_long_long;
1973 putithere->typed_val_int.val = n;
1975 /* If the high bit of the worked out type is set then this number
1976 has to be unsigned. */
1978 if (unsigned_p || (n & high_bit))
1980 putithere->typed_val_int.type = unsigned_type;
1984 putithere->typed_val_int.type = signed_type;
1990 /* Temporary obstack used for holding strings. */
1991 static struct obstack tempbuf;
1992 static int tempbuf_init;
1994 /* Parse a C escape sequence. The initial backslash of the sequence
1995 is at (*PTR)[-1]. *PTR will be updated to point to just after the
1996 last character of the sequence. If OUTPUT is not NULL, the
1997 translated form of the escape sequence will be written there. If
1998 OUTPUT is NULL, no output is written and the call will only affect
1999 *PTR. If an escape sequence is expressed in target bytes, then the
2000 entire sequence will simply be copied to OUTPUT. Return 1 if any
2001 character was emitted, 0 otherwise. */
2004 c_parse_escape (const char **ptr, struct obstack *output)
2006 const char *tokptr = *ptr;
2009 /* Some escape sequences undergo character set conversion. Those we
2013 /* Hex escapes do not undergo character set conversion, so keep
2014 the escape sequence for later. */
2017 obstack_grow_str (output, "\\x");
2019 if (!isxdigit (*tokptr))
2020 error (_("\\x escape without a following hex digit"));
2021 while (isxdigit (*tokptr))
2024 obstack_1grow (output, *tokptr);
2029 /* Octal escapes do not undergo character set conversion, so
2030 keep the escape sequence for later. */
2042 obstack_grow_str (output, "\\");
2044 i < 3 && isdigit (*tokptr) && *tokptr != '8' && *tokptr != '9';
2048 obstack_1grow (output, *tokptr);
2054 /* We handle UCNs later. We could handle them here, but that
2055 would mean a spurious error in the case where the UCN could
2056 be converted to the target charset but not the host
2062 int i, len = c == 'U' ? 8 : 4;
2065 obstack_1grow (output, '\\');
2066 obstack_1grow (output, *tokptr);
2069 if (!isxdigit (*tokptr))
2070 error (_("\\%c escape without a following hex digit"), c);
2071 for (i = 0; i < len && isxdigit (*tokptr); ++i)
2074 obstack_1grow (output, *tokptr);
2080 /* We must pass backslash through so that it does not
2081 cause quoting during the second expansion. */
2084 obstack_grow_str (output, "\\\\");
2088 /* Escapes which undergo conversion. */
2091 obstack_1grow (output, '\a');
2096 obstack_1grow (output, '\b');
2101 obstack_1grow (output, '\f');
2106 obstack_1grow (output, '\n');
2111 obstack_1grow (output, '\r');
2116 obstack_1grow (output, '\t');
2121 obstack_1grow (output, '\v');
2125 /* GCC extension. */
2128 obstack_1grow (output, HOST_ESCAPE_CHAR);
2132 /* Backslash-newline expands to nothing at all. */
2138 /* A few escapes just expand to the character itself. */
2142 /* GCC extensions. */
2147 /* Unrecognized escapes turn into the character itself. */
2150 obstack_1grow (output, *tokptr);
2158 /* Parse a string or character literal from TOKPTR. The string or
2159 character may be wide or unicode. *OUTPTR is set to just after the
2160 end of the literal in the input string. The resulting token is
2161 stored in VALUE. This returns a token value, either STRING or
2162 CHAR, depending on what was parsed. *HOST_CHARS is set to the
2163 number of host characters in the literal. */
2166 parse_string_or_char (const char *tokptr, const char **outptr,
2167 struct typed_stoken *value, int *host_chars)
2173 /* Build the gdb internal form of the input string in tempbuf. Note
2174 that the buffer is null byte terminated *only* for the
2175 convenience of debugging gdb itself and printing the buffer
2176 contents when the buffer contains no embedded nulls. Gdb does
2177 not depend upon the buffer being null byte terminated, it uses
2178 the length string instead. This allows gdb to handle C strings
2179 (as well as strings in other languages) with embedded null
2185 obstack_free (&tempbuf, NULL);
2186 obstack_init (&tempbuf);
2188 /* Record the string type. */
2191 type = C_WIDE_STRING;
2194 else if (*tokptr == 'u')
2199 else if (*tokptr == 'U')
2204 else if (*tokptr == '@')
2206 /* An Objective C string. */
2214 /* Skip the quote. */
2228 *host_chars += c_parse_escape (&tokptr, &tempbuf);
2230 else if (c == quote)
2234 obstack_1grow (&tempbuf, c);
2236 /* FIXME: this does the wrong thing with multi-byte host
2237 characters. We could use mbrlen here, but that would
2238 make "set host-charset" a bit less useful. */
2243 if (*tokptr != quote)
2246 error (_("Unterminated string in expression."));
2248 error (_("Unmatched single quote."));
2253 value->ptr = (char *) obstack_base (&tempbuf);
2254 value->length = obstack_object_size (&tempbuf);
2258 return quote == '"' ? (is_objc ? NSSTRING : STRING) : CHAR;
2261 /* This is used to associate some attributes with a token. */
2265 /* If this bit is set, the token is C++-only. */
2269 /* If this bit is set, the token is conditional: if there is a
2270 symbol of the same name, then the token is a symbol; otherwise,
2271 the token is a keyword. */
2275 DEF_ENUM_FLAGS_TYPE (enum token_flag, token_flags);
2281 enum exp_opcode opcode;
2285 static const struct token tokentab3[] =
2287 {">>=", ASSIGN_MODIFY, BINOP_RSH, 0},
2288 {"<<=", ASSIGN_MODIFY, BINOP_LSH, 0},
2289 {"->*", ARROW_STAR, BINOP_END, FLAG_CXX},
2290 {"...", DOTDOTDOT, BINOP_END, 0}
2293 static const struct token tokentab2[] =
2295 {"+=", ASSIGN_MODIFY, BINOP_ADD, 0},
2296 {"-=", ASSIGN_MODIFY, BINOP_SUB, 0},
2297 {"*=", ASSIGN_MODIFY, BINOP_MUL, 0},
2298 {"/=", ASSIGN_MODIFY, BINOP_DIV, 0},
2299 {"%=", ASSIGN_MODIFY, BINOP_REM, 0},
2300 {"|=", ASSIGN_MODIFY, BINOP_BITWISE_IOR, 0},
2301 {"&=", ASSIGN_MODIFY, BINOP_BITWISE_AND, 0},
2302 {"^=", ASSIGN_MODIFY, BINOP_BITWISE_XOR, 0},
2303 {"++", INCREMENT, BINOP_END, 0},
2304 {"--", DECREMENT, BINOP_END, 0},
2305 {"->", ARROW, BINOP_END, 0},
2306 {"&&", ANDAND, BINOP_END, 0},
2307 {"||", OROR, BINOP_END, 0},
2308 /* "::" is *not* only C++: gdb overrides its meaning in several
2309 different ways, e.g., 'filename'::func, function::variable. */
2310 {"::", COLONCOLON, BINOP_END, 0},
2311 {"<<", LSH, BINOP_END, 0},
2312 {">>", RSH, BINOP_END, 0},
2313 {"==", EQUAL, BINOP_END, 0},
2314 {"!=", NOTEQUAL, BINOP_END, 0},
2315 {"<=", LEQ, BINOP_END, 0},
2316 {">=", GEQ, BINOP_END, 0},
2317 {".*", DOT_STAR, BINOP_END, FLAG_CXX}
2320 /* Identifier-like tokens. */
2321 static const struct token ident_tokens[] =
2323 {"unsigned", UNSIGNED, OP_NULL, 0},
2324 {"template", TEMPLATE, OP_NULL, FLAG_CXX},
2325 {"volatile", VOLATILE_KEYWORD, OP_NULL, 0},
2326 {"struct", STRUCT, OP_NULL, 0},
2327 {"signed", SIGNED_KEYWORD, OP_NULL, 0},
2328 {"sizeof", SIZEOF, OP_NULL, 0},
2329 {"double", DOUBLE_KEYWORD, OP_NULL, 0},
2330 {"false", FALSEKEYWORD, OP_NULL, FLAG_CXX},
2331 {"class", CLASS, OP_NULL, FLAG_CXX},
2332 {"union", UNION, OP_NULL, 0},
2333 {"short", SHORT, OP_NULL, 0},
2334 {"const", CONST_KEYWORD, OP_NULL, 0},
2335 {"enum", ENUM, OP_NULL, 0},
2336 {"long", LONG, OP_NULL, 0},
2337 {"true", TRUEKEYWORD, OP_NULL, FLAG_CXX},
2338 {"int", INT_KEYWORD, OP_NULL, 0},
2339 {"new", NEW, OP_NULL, FLAG_CXX},
2340 {"delete", DELETE, OP_NULL, FLAG_CXX},
2341 {"operator", OPERATOR, OP_NULL, FLAG_CXX},
2343 {"and", ANDAND, BINOP_END, FLAG_CXX},
2344 {"and_eq", ASSIGN_MODIFY, BINOP_BITWISE_AND, FLAG_CXX},
2345 {"bitand", '&', OP_NULL, FLAG_CXX},
2346 {"bitor", '|', OP_NULL, FLAG_CXX},
2347 {"compl", '~', OP_NULL, FLAG_CXX},
2348 {"not", '!', OP_NULL, FLAG_CXX},
2349 {"not_eq", NOTEQUAL, BINOP_END, FLAG_CXX},
2350 {"or", OROR, BINOP_END, FLAG_CXX},
2351 {"or_eq", ASSIGN_MODIFY, BINOP_BITWISE_IOR, FLAG_CXX},
2352 {"xor", '^', OP_NULL, FLAG_CXX},
2353 {"xor_eq", ASSIGN_MODIFY, BINOP_BITWISE_XOR, FLAG_CXX},
2355 {"const_cast", CONST_CAST, OP_NULL, FLAG_CXX },
2356 {"dynamic_cast", DYNAMIC_CAST, OP_NULL, FLAG_CXX },
2357 {"static_cast", STATIC_CAST, OP_NULL, FLAG_CXX },
2358 {"reinterpret_cast", REINTERPRET_CAST, OP_NULL, FLAG_CXX },
2360 {"__typeof__", TYPEOF, OP_TYPEOF, 0 },
2361 {"__typeof", TYPEOF, OP_TYPEOF, 0 },
2362 {"typeof", TYPEOF, OP_TYPEOF, FLAG_SHADOW },
2363 {"__decltype", DECLTYPE, OP_DECLTYPE, FLAG_CXX },
2364 {"decltype", DECLTYPE, OP_DECLTYPE, FLAG_CXX | FLAG_SHADOW },
2366 {"typeid", TYPEID, OP_TYPEID, FLAG_CXX}
2369 /* When we find that lexptr (the global var defined in parse.c) is
2370 pointing at a macro invocation, we expand the invocation, and call
2371 scan_macro_expansion to save the old lexptr here and point lexptr
2372 into the expanded text. When we reach the end of that, we call
2373 end_macro_expansion to pop back to the value we saved here. The
2374 macro expansion code promises to return only fully-expanded text,
2375 so we don't need to "push" more than one level.
2377 This is disgusting, of course. It would be cleaner to do all macro
2378 expansion beforehand, and then hand that to lexptr. But we don't
2379 really know where the expression ends. Remember, in a command like
2381 (gdb) break *ADDRESS if CONDITION
2383 we evaluate ADDRESS in the scope of the current frame, but we
2384 evaluate CONDITION in the scope of the breakpoint's location. So
2385 it's simply wrong to try to macro-expand the whole thing at once. */
2386 static const char *macro_original_text;
2388 /* We save all intermediate macro expansions on this obstack for the
2389 duration of a single parse. The expansion text may sometimes have
2390 to live past the end of the expansion, due to yacc lookahead.
2391 Rather than try to be clever about saving the data for a single
2392 token, we simply keep it all and delete it after parsing has
2394 static struct obstack expansion_obstack;
2397 scan_macro_expansion (char *expansion)
2401 /* We'd better not be trying to push the stack twice. */
2402 gdb_assert (! macro_original_text);
2404 /* Copy to the obstack, and then free the intermediate
2406 copy = (char *) obstack_copy0 (&expansion_obstack, expansion,
2407 strlen (expansion));
2410 /* Save the old lexptr value, so we can return to it when we're done
2411 parsing the expanded text. */
2412 macro_original_text = lexptr;
2417 scanning_macro_expansion (void)
2419 return macro_original_text != 0;
2423 finished_macro_expansion (void)
2425 /* There'd better be something to pop back to. */
2426 gdb_assert (macro_original_text);
2428 /* Pop back to the original text. */
2429 lexptr = macro_original_text;
2430 macro_original_text = 0;
2434 scan_macro_cleanup (void *dummy)
2436 if (macro_original_text)
2437 finished_macro_expansion ();
2439 obstack_free (&expansion_obstack, NULL);
2442 /* Return true iff the token represents a C++ cast operator. */
2445 is_cast_operator (const char *token, int len)
2447 return (! strncmp (token, "dynamic_cast", len)
2448 || ! strncmp (token, "static_cast", len)
2449 || ! strncmp (token, "reinterpret_cast", len)
2450 || ! strncmp (token, "const_cast", len));
2453 /* The scope used for macro expansion. */
2454 static struct macro_scope *expression_macro_scope;
2456 /* This is set if a NAME token appeared at the very end of the input
2457 string, with no whitespace separating the name from the EOF. This
2458 is used only when parsing to do field name completion. */
2459 static int saw_name_at_eof;
2461 /* This is set if the previously-returned token was a structure
2462 operator -- either '.' or ARROW. This is used only when parsing to
2463 do field name completion. */
2464 static int last_was_structop;
2466 /* Read one token, getting characters through lexptr. */
2469 lex_one_token (struct parser_state *par_state, int *is_quoted_name)
2474 const char *tokstart;
2475 int saw_structop = last_was_structop;
2478 last_was_structop = 0;
2479 *is_quoted_name = 0;
2483 /* Check if this is a macro invocation that we need to expand. */
2484 if (! scanning_macro_expansion ())
2486 char *expanded = macro_expand_next (&lexptr,
2487 standard_macro_lookup,
2488 expression_macro_scope);
2491 scan_macro_expansion (expanded);
2494 prev_lexptr = lexptr;
2497 /* See if it is a special token of length 3. */
2498 for (i = 0; i < sizeof tokentab3 / sizeof tokentab3[0]; i++)
2499 if (strncmp (tokstart, tokentab3[i].oper, 3) == 0)
2501 if ((tokentab3[i].flags & FLAG_CXX) != 0
2502 && parse_language (par_state)->la_language != language_cplus)
2506 yylval.opcode = tokentab3[i].opcode;
2507 return tokentab3[i].token;
2510 /* See if it is a special token of length 2. */
2511 for (i = 0; i < sizeof tokentab2 / sizeof tokentab2[0]; i++)
2512 if (strncmp (tokstart, tokentab2[i].oper, 2) == 0)
2514 if ((tokentab2[i].flags & FLAG_CXX) != 0
2515 && parse_language (par_state)->la_language != language_cplus)
2519 yylval.opcode = tokentab2[i].opcode;
2520 if (parse_completion && tokentab2[i].token == ARROW)
2521 last_was_structop = 1;
2522 return tokentab2[i].token;
2525 switch (c = *tokstart)
2528 /* If we were just scanning the result of a macro expansion,
2529 then we need to resume scanning the original text.
2530 If we're parsing for field name completion, and the previous
2531 token allows such completion, return a COMPLETE token.
2532 Otherwise, we were already scanning the original text, and
2533 we're really done. */
2534 if (scanning_macro_expansion ())
2536 finished_macro_expansion ();
2539 else if (saw_name_at_eof)
2541 saw_name_at_eof = 0;
2544 else if (saw_structop)
2559 if (parse_language (par_state)->la_language == language_objc
2566 if (paren_depth == 0)
2573 if (comma_terminates
2575 && ! scanning_macro_expansion ())
2581 /* Might be a floating point number. */
2582 if (lexptr[1] < '0' || lexptr[1] > '9')
2584 if (parse_completion)
2585 last_was_structop = 1;
2586 goto symbol; /* Nope, must be a symbol. */
2588 /* FALL THRU into number case. */
2601 /* It's a number. */
2602 int got_dot = 0, got_e = 0, toktype;
2603 const char *p = tokstart;
2604 int hex = input_radix > 10;
2606 if (c == '0' && (p[1] == 'x' || p[1] == 'X'))
2611 else if (c == '0' && (p[1]=='t' || p[1]=='T' || p[1]=='d' || p[1]=='D'))
2619 /* This test includes !hex because 'e' is a valid hex digit
2620 and thus does not indicate a floating point number when
2621 the radix is hex. */
2622 if (!hex && !got_e && (*p == 'e' || *p == 'E'))
2623 got_dot = got_e = 1;
2624 /* This test does not include !hex, because a '.' always indicates
2625 a decimal floating point number regardless of the radix. */
2626 else if (!got_dot && *p == '.')
2628 else if (got_e && (p[-1] == 'e' || p[-1] == 'E')
2629 && (*p == '-' || *p == '+'))
2630 /* This is the sign of the exponent, not the end of the
2633 /* We will take any letters or digits. parse_number will
2634 complain if past the radix, or if L or U are not final. */
2635 else if ((*p < '0' || *p > '9')
2636 && ((*p < 'a' || *p > 'z')
2637 && (*p < 'A' || *p > 'Z')))
2640 toktype = parse_number (par_state, tokstart, p - tokstart,
2641 got_dot|got_e, &yylval);
2642 if (toktype == ERROR)
2644 char *err_copy = (char *) alloca (p - tokstart + 1);
2646 memcpy (err_copy, tokstart, p - tokstart);
2647 err_copy[p - tokstart] = 0;
2648 error (_("Invalid number \"%s\"."), err_copy);
2656 const char *p = &tokstart[1];
2657 size_t len = strlen ("entry");
2659 if (parse_language (par_state)->la_language == language_objc)
2661 size_t len = strlen ("selector");
2663 if (strncmp (p, "selector", len) == 0
2664 && (p[len] == '\0' || isspace (p[len])))
2673 while (isspace (*p))
2675 if (strncmp (p, "entry", len) == 0 && !isalnum (p[len])
2707 if (tokstart[1] != '"' && tokstart[1] != '\'')
2716 int result = parse_string_or_char (tokstart, &lexptr, &yylval.tsval,
2721 error (_("Empty character constant."));
2722 else if (host_len > 2 && c == '\'')
2725 namelen = lexptr - tokstart - 1;
2726 *is_quoted_name = 1;
2730 else if (host_len > 1)
2731 error (_("Invalid character constant."));
2737 if (!(c == '_' || c == '$'
2738 || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')))
2739 /* We must have come across a bad character (e.g. ';'). */
2740 error (_("Invalid character '%c' in expression."), c);
2742 /* It's a name. See how long it is. */
2744 for (c = tokstart[namelen];
2745 (c == '_' || c == '$' || (c >= '0' && c <= '9')
2746 || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '<');)
2748 /* Template parameter lists are part of the name.
2749 FIXME: This mishandles `print $a<4&&$a>3'. */
2753 if (! is_cast_operator (tokstart, namelen))
2755 /* Scan ahead to get rest of the template specification. Note
2756 that we look ahead only when the '<' adjoins non-whitespace
2757 characters; for comparison expressions, e.g. "a < b > c",
2758 there must be spaces before the '<', etc. */
2759 const char *p = find_template_name_end (tokstart + namelen);
2762 namelen = p - tokstart;
2766 c = tokstart[++namelen];
2769 /* The token "if" terminates the expression and is NOT removed from
2770 the input stream. It doesn't count if it appears in the
2771 expansion of a macro. */
2773 && tokstart[0] == 'i'
2774 && tokstart[1] == 'f'
2775 && ! scanning_macro_expansion ())
2780 /* For the same reason (breakpoint conditions), "thread N"
2781 terminates the expression. "thread" could be an identifier, but
2782 an identifier is never followed by a number without intervening
2783 punctuation. "task" is similar. Handle abbreviations of these,
2784 similarly to breakpoint.c:find_condition_and_thread. */
2786 && (strncmp (tokstart, "thread", namelen) == 0
2787 || strncmp (tokstart, "task", namelen) == 0)
2788 && (tokstart[namelen] == ' ' || tokstart[namelen] == '\t')
2789 && ! scanning_macro_expansion ())
2791 const char *p = tokstart + namelen + 1;
2793 while (*p == ' ' || *p == '\t')
2795 if (*p >= '0' && *p <= '9')
2803 yylval.sval.ptr = tokstart;
2804 yylval.sval.length = namelen;
2806 /* Catch specific keywords. */
2807 copy = copy_name (yylval.sval);
2808 for (i = 0; i < sizeof ident_tokens / sizeof ident_tokens[0]; i++)
2809 if (strcmp (copy, ident_tokens[i].oper) == 0)
2811 if ((ident_tokens[i].flags & FLAG_CXX) != 0
2812 && parse_language (par_state)->la_language != language_cplus)
2815 if ((ident_tokens[i].flags & FLAG_SHADOW) != 0)
2817 struct field_of_this_result is_a_field_of_this;
2819 if (lookup_symbol (copy, expression_context_block,
2821 (parse_language (par_state)->la_language
2822 == language_cplus ? &is_a_field_of_this
2826 /* The keyword is shadowed. */
2831 /* It is ok to always set this, even though we don't always
2832 strictly need to. */
2833 yylval.opcode = ident_tokens[i].opcode;
2834 return ident_tokens[i].token;
2837 if (*tokstart == '$')
2840 if (parse_completion && *lexptr == '\0')
2841 saw_name_at_eof = 1;
2843 yylval.ssym.stoken = yylval.sval;
2844 yylval.ssym.sym.symbol = NULL;
2845 yylval.ssym.sym.block = NULL;
2846 yylval.ssym.is_a_field_of_this = 0;
2850 /* An object of this type is pushed on a FIFO by the "outer" lexer. */
2857 DEF_VEC_O (token_and_value);
2859 /* A FIFO of tokens that have been read but not yet returned to the
2861 static VEC (token_and_value) *token_fifo;
2863 /* Non-zero if the lexer should return tokens from the FIFO. */
2866 /* Temporary storage for c_lex; this holds symbol names as they are
2868 auto_obstack name_obstack;
2870 /* Classify a NAME token. The contents of the token are in `yylval'.
2871 Updates yylval and returns the new token type. BLOCK is the block
2872 in which lookups start; this can be NULL to mean the global scope.
2873 IS_QUOTED_NAME is non-zero if the name token was originally quoted
2874 in single quotes. */
2877 classify_name (struct parser_state *par_state, const struct block *block,
2880 struct block_symbol bsym;
2882 struct field_of_this_result is_a_field_of_this;
2884 copy = copy_name (yylval.sval);
2886 /* Initialize this in case we *don't* use it in this call; that way
2887 we can refer to it unconditionally below. */
2888 memset (&is_a_field_of_this, 0, sizeof (is_a_field_of_this));
2890 bsym = lookup_symbol (copy, block, VAR_DOMAIN,
2891 parse_language (par_state)->la_name_of_this
2892 ? &is_a_field_of_this : NULL);
2894 if (bsym.symbol && SYMBOL_CLASS (bsym.symbol) == LOC_BLOCK)
2896 yylval.ssym.sym = bsym;
2897 yylval.ssym.is_a_field_of_this = is_a_field_of_this.type != NULL;
2900 else if (!bsym.symbol)
2902 /* If we found a field of 'this', we might have erroneously
2903 found a constructor where we wanted a type name. Handle this
2904 case by noticing that we found a constructor and then look up
2905 the type tag instead. */
2906 if (is_a_field_of_this.type != NULL
2907 && is_a_field_of_this.fn_field != NULL
2908 && TYPE_FN_FIELD_CONSTRUCTOR (is_a_field_of_this.fn_field->fn_fields,
2911 struct field_of_this_result inner_is_a_field_of_this;
2913 bsym = lookup_symbol (copy, block, STRUCT_DOMAIN,
2914 &inner_is_a_field_of_this);
2915 if (bsym.symbol != NULL)
2917 yylval.tsym.type = SYMBOL_TYPE (bsym.symbol);
2922 /* If we found a field, then we want to prefer it over a
2923 filename. However, if the name was quoted, then it is better
2924 to check for a filename or a block, since this is the only
2925 way the user has of requiring the extension to be used. */
2926 if (is_a_field_of_this.type == NULL || is_quoted_name)
2928 /* See if it's a file name. */
2929 struct symtab *symtab;
2931 symtab = lookup_symtab (copy);
2934 yylval.bval = BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (symtab),
2941 if (bsym.symbol && SYMBOL_CLASS (bsym.symbol) == LOC_TYPEDEF)
2943 yylval.tsym.type = SYMBOL_TYPE (bsym.symbol);
2947 /* See if it's an ObjC classname. */
2948 if (parse_language (par_state)->la_language == language_objc && !bsym.symbol)
2950 CORE_ADDR Class = lookup_objc_class (parse_gdbarch (par_state), copy);
2955 yylval.theclass.theclass = Class;
2956 sym = lookup_struct_typedef (copy, expression_context_block, 1);
2958 yylval.theclass.type = SYMBOL_TYPE (sym);
2963 /* Input names that aren't symbols but ARE valid hex numbers, when
2964 the input radix permits them, can be names or numbers depending
2965 on the parse. Note we support radixes > 16 here. */
2967 && ((copy[0] >= 'a' && copy[0] < 'a' + input_radix - 10)
2968 || (copy[0] >= 'A' && copy[0] < 'A' + input_radix - 10)))
2970 YYSTYPE newlval; /* Its value is ignored. */
2971 int hextype = parse_number (par_state, copy, yylval.sval.length,
2976 yylval.ssym.sym = bsym;
2977 yylval.ssym.is_a_field_of_this = is_a_field_of_this.type != NULL;
2982 /* Any other kind of symbol */
2983 yylval.ssym.sym = bsym;
2984 yylval.ssym.is_a_field_of_this = is_a_field_of_this.type != NULL;
2986 if (bsym.symbol == NULL
2987 && parse_language (par_state)->la_language == language_cplus
2988 && is_a_field_of_this.type == NULL
2989 && lookup_minimal_symbol (copy, NULL, NULL).minsym == NULL)
2990 return UNKNOWN_CPP_NAME;
2995 /* Like classify_name, but used by the inner loop of the lexer, when a
2996 name might have already been seen. CONTEXT is the context type, or
2997 NULL if this is the first component of a name. */
3000 classify_inner_name (struct parser_state *par_state,
3001 const struct block *block, struct type *context)
3006 if (context == NULL)
3007 return classify_name (par_state, block, 0);
3009 type = check_typedef (context);
3010 if (!type_aggregate_p (type))
3013 copy = copy_name (yylval.ssym.stoken);
3014 /* N.B. We assume the symbol can only be in VAR_DOMAIN. */
3015 yylval.ssym.sym = cp_lookup_nested_symbol (type, copy, block, VAR_DOMAIN);
3017 /* If no symbol was found, search for a matching base class named
3018 COPY. This will allow users to enter qualified names of class members
3019 relative to the `this' pointer. */
3020 if (yylval.ssym.sym.symbol == NULL)
3022 struct type *base_type = cp_find_type_baseclass_by_name (type, copy);
3024 if (base_type != NULL)
3026 yylval.tsym.type = base_type;
3033 switch (SYMBOL_CLASS (yylval.ssym.sym.symbol))
3037 /* cp_lookup_nested_symbol might have accidentally found a constructor
3038 named COPY when we really wanted a base class of the same name.
3039 Double-check this case by looking for a base class. */
3041 struct type *base_type = cp_find_type_baseclass_by_name (type, copy);
3043 if (base_type != NULL)
3045 yylval.tsym.type = base_type;
3052 yylval.tsym.type = SYMBOL_TYPE (yylval.ssym.sym.symbol);
3058 internal_error (__FILE__, __LINE__, _("not reached"));
3061 /* The outer level of a two-level lexer. This calls the inner lexer
3062 to return tokens. It then either returns these tokens, or
3063 aggregates them into a larger token. This lets us work around a
3064 problem in our parsing approach, where the parser could not
3065 distinguish between qualified names and qualified types at the
3068 This approach is still not ideal, because it mishandles template
3069 types. See the comment in lex_one_token for an example. However,
3070 this is still an improvement over the earlier approach, and will
3071 suffice until we move to better parsing technology. */
3076 token_and_value current;
3077 int first_was_coloncolon, last_was_coloncolon;
3078 struct type *context_type = NULL;
3079 int last_to_examine, next_to_examine, checkpoint;
3080 const struct block *search_block;
3083 if (popping && !VEC_empty (token_and_value, token_fifo))
3087 /* Read the first token and decide what to do. Most of the
3088 subsequent code is C++-only; but also depends on seeing a "::" or
3090 current.token = lex_one_token (pstate, &is_quoted_name);
3091 if (current.token == NAME)
3092 current.token = classify_name (pstate, expression_context_block,
3094 if (parse_language (pstate)->la_language != language_cplus
3095 || (current.token != TYPENAME && current.token != COLONCOLON
3096 && current.token != FILENAME))
3097 return current.token;
3099 /* Read any sequence of alternating "::" and name-like tokens into
3101 current.value = yylval;
3102 VEC_safe_push (token_and_value, token_fifo, ¤t);
3103 last_was_coloncolon = current.token == COLONCOLON;
3108 /* We ignore quoted names other than the very first one.
3109 Subsequent ones do not have any special meaning. */
3110 current.token = lex_one_token (pstate, &ignore);
3111 current.value = yylval;
3112 VEC_safe_push (token_and_value, token_fifo, ¤t);
3114 if ((last_was_coloncolon && current.token != NAME)
3115 || (!last_was_coloncolon && current.token != COLONCOLON))
3117 last_was_coloncolon = !last_was_coloncolon;
3121 /* We always read one extra token, so compute the number of tokens
3122 to examine accordingly. */
3123 last_to_examine = VEC_length (token_and_value, token_fifo) - 2;
3124 next_to_examine = 0;
3126 current = *VEC_index (token_and_value, token_fifo, next_to_examine);
3129 name_obstack.clear ();
3131 if (current.token == FILENAME)
3132 search_block = current.value.bval;
3133 else if (current.token == COLONCOLON)
3134 search_block = NULL;
3137 gdb_assert (current.token == TYPENAME);
3138 search_block = expression_context_block;
3139 obstack_grow (&name_obstack, current.value.sval.ptr,
3140 current.value.sval.length);
3141 context_type = current.value.tsym.type;
3145 first_was_coloncolon = current.token == COLONCOLON;
3146 last_was_coloncolon = first_was_coloncolon;
3148 while (next_to_examine <= last_to_examine)
3150 token_and_value *next;
3152 next = VEC_index (token_and_value, token_fifo, next_to_examine);
3155 if (next->token == NAME && last_was_coloncolon)
3159 yylval = next->value;
3160 classification = classify_inner_name (pstate, search_block,
3162 /* We keep going until we either run out of names, or until
3163 we have a qualified name which is not a type. */
3164 if (classification != TYPENAME && classification != NAME)
3167 /* Accept up to this token. */
3168 checkpoint = next_to_examine;
3170 /* Update the partial name we are constructing. */
3171 if (context_type != NULL)
3173 /* We don't want to put a leading "::" into the name. */
3174 obstack_grow_str (&name_obstack, "::");
3176 obstack_grow (&name_obstack, next->value.sval.ptr,
3177 next->value.sval.length);
3179 yylval.sval.ptr = (const char *) obstack_base (&name_obstack);
3180 yylval.sval.length = obstack_object_size (&name_obstack);
3181 current.value = yylval;
3182 current.token = classification;
3184 last_was_coloncolon = 0;
3186 if (classification == NAME)
3189 context_type = yylval.tsym.type;
3191 else if (next->token == COLONCOLON && !last_was_coloncolon)
3192 last_was_coloncolon = 1;
3195 /* We've reached the end of the name. */
3200 /* If we have a replacement token, install it as the first token in
3201 the FIFO, and delete the other constituent tokens. */
3204 current.value.sval.ptr
3205 = (const char *) obstack_copy0 (&expansion_obstack,
3206 current.value.sval.ptr,
3207 current.value.sval.length);
3209 VEC_replace (token_and_value, token_fifo, 0, ¤t);
3211 VEC_block_remove (token_and_value, token_fifo, 1, checkpoint - 1);
3215 current = *VEC_index (token_and_value, token_fifo, 0);
3216 VEC_ordered_remove (token_and_value, token_fifo, 0);
3217 yylval = current.value;
3218 return current.token;
3222 c_parse (struct parser_state *par_state)
3225 struct cleanup *back_to;
3227 /* Setting up the parser state. */
3228 scoped_restore pstate_restore = make_scoped_restore (&pstate);
3229 gdb_assert (par_state != NULL);
3232 /* Note that parsing (within yyparse) freely installs cleanups
3233 assuming they'll be run here (below). */
3235 back_to = make_cleanup (free_current_contents, &expression_macro_scope);
3237 /* Set up the scope for macro expansion. */
3238 expression_macro_scope = NULL;
3240 if (expression_context_block)
3241 expression_macro_scope
3242 = sal_macro_scope (find_pc_line (expression_context_pc, 0));
3244 expression_macro_scope = default_macro_scope ();
3245 if (! expression_macro_scope)
3246 expression_macro_scope = user_macro_scope ();
3248 /* Initialize macro expansion code. */
3249 obstack_init (&expansion_obstack);
3250 gdb_assert (! macro_original_text);
3251 make_cleanup (scan_macro_cleanup, 0);
3253 scoped_restore restore_yydebug = make_scoped_restore (&yydebug,
3256 /* Initialize some state used by the lexer. */
3257 last_was_structop = 0;
3258 saw_name_at_eof = 0;
3260 VEC_free (token_and_value, token_fifo);
3262 name_obstack.clear ();
3264 result = yyparse ();
3265 do_cleanups (back_to);
3272 /* This is called via the YYPRINT macro when parser debugging is
3273 enabled. It prints a token's value. */
3276 c_print_token (FILE *file, int type, YYSTYPE value)
3281 parser_fprintf (file, "typed_val_int<%s, %s>",
3282 TYPE_SAFE_NAME (value.typed_val_int.type),
3283 pulongest (value.typed_val_int.val));
3289 char *copy = (char *) alloca (value.tsval.length + 1);
3291 memcpy (copy, value.tsval.ptr, value.tsval.length);
3292 copy[value.tsval.length] = '\0';
3294 parser_fprintf (file, "tsval<type=%d, %s>", value.tsval.type, copy);
3300 parser_fprintf (file, "sval<%s>", copy_name (value.sval));
3304 parser_fprintf (file, "tsym<type=%s, name=%s>",
3305 TYPE_SAFE_NAME (value.tsym.type),
3306 copy_name (value.tsym.stoken));
3310 case UNKNOWN_CPP_NAME:
3313 parser_fprintf (file, "ssym<name=%s, sym=%s, field_of_this=%d>",
3314 copy_name (value.ssym.stoken),
3315 (value.ssym.sym.symbol == NULL
3316 ? "(null)" : SYMBOL_PRINT_NAME (value.ssym.sym.symbol)),
3317 value.ssym.is_a_field_of_this);
3321 parser_fprintf (file, "bval<%s>", host_address_to_string (value.bval));
3329 yyerror (const char *msg)
3332 lexptr = prev_lexptr;
3334 error (_("A %s in expression, near `%s'."), (msg ? msg : "error"), lexptr);