1 /* YACC parser for C expressions, for GDB.
2 Copyright (C) 1986-2019 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 struct stoken typename_stoken (const char *);
117 static void check_parameter_typelist (VEC (type_ptr) *);
118 static void write_destructor_name (struct parser_state *par_state,
122 static void c_print_token (FILE *file, int type, YYSTYPE value);
123 #define YYPRINT(FILE, TYPE, VALUE) c_print_token (FILE, TYPE, VALUE)
127 %type <voidval> exp exp1 type_exp start variable qualified_name lcurly function_method
129 %type <tval> type typebase
130 %type <tvec> nonempty_typelist func_mod parameter_typelist
131 /* %type <bval> block */
133 /* Fancy type parsing. */
135 %type <lval> array_mod
136 %type <tval> conversion_type_id
138 %type <type_stack> ptr_operator_ts abs_decl direct_abs_decl
140 %token <typed_val_int> INT
141 %token <typed_val_float> FLOAT
143 /* Both NAME and TYPENAME tokens represent symbols in the input,
144 and both convey their data as strings.
145 But a TYPENAME is a string that happens to be defined as a typedef
146 or builtin type name (such as int or char)
147 and a NAME is any other symbol.
148 Contexts where this distinction is not important can use the
149 nonterminal "name", which matches either NAME or TYPENAME. */
151 %token <tsval> STRING
152 %token <sval> NSSTRING /* ObjC Foundation "NSString" literal */
153 %token SELECTOR /* ObjC "@selector" pseudo-operator */
155 %token <ssym> NAME /* BLOCKNAME defined below to give it higher precedence. */
156 %token <ssym> UNKNOWN_CPP_NAME
157 %token <voidval> COMPLETE
158 %token <tsym> TYPENAME
159 %token <theclass> CLASSNAME /* ObjC Class name */
160 %type <sval> name field_name
161 %type <svec> string_exp
162 %type <ssym> name_not_typename
163 %type <tsym> type_name
165 /* This is like a '[' token, but is only generated when parsing
166 Objective C. This lets us reuse the same parser without
167 erroneously parsing ObjC-specific expressions in C. */
170 /* A NAME_OR_INT is a symbol which is not known in the symbol table,
171 but which would parse as a valid number in the current input radix.
172 E.g. "c" when input_radix==16. Depending on the parse, it will be
173 turned into a name or into a number. */
175 %token <ssym> NAME_OR_INT
178 %token STRUCT CLASS UNION ENUM SIZEOF ALIGNOF UNSIGNED COLONCOLON
183 %token REINTERPRET_CAST DYNAMIC_CAST STATIC_CAST CONST_CAST
189 /* Special type cases, put in to allow the parser to distinguish different
191 %token SIGNED_KEYWORD LONG SHORT INT_KEYWORD CONST_KEYWORD VOLATILE_KEYWORD DOUBLE_KEYWORD
193 %token <sval> VARIABLE
195 %token <opcode> ASSIGN_MODIFY
204 %right '=' ASSIGN_MODIFY
212 %left '<' '>' LEQ GEQ
217 %right UNARY INCREMENT DECREMENT
218 %right ARROW ARROW_STAR '.' DOT_STAR '[' OBJC_LBRAC '('
219 %token <ssym> BLOCKNAME
220 %token <bval> FILENAME
234 { write_exp_elt_opcode(pstate, OP_TYPE);
235 write_exp_elt_type(pstate, $1);
236 write_exp_elt_opcode(pstate, OP_TYPE);}
239 write_exp_elt_opcode (pstate, OP_TYPEOF);
241 | TYPEOF '(' type ')'
243 write_exp_elt_opcode (pstate, OP_TYPE);
244 write_exp_elt_type (pstate, $3);
245 write_exp_elt_opcode (pstate, OP_TYPE);
247 | DECLTYPE '(' exp ')'
249 write_exp_elt_opcode (pstate, OP_DECLTYPE);
253 /* Expressions, including the comma operator. */
256 { write_exp_elt_opcode (pstate, BINOP_COMMA); }
259 /* Expressions, not including the comma operator. */
260 exp : '*' exp %prec UNARY
261 { write_exp_elt_opcode (pstate, UNOP_IND); }
264 exp : '&' exp %prec UNARY
265 { write_exp_elt_opcode (pstate, UNOP_ADDR); }
268 exp : '-' exp %prec UNARY
269 { write_exp_elt_opcode (pstate, UNOP_NEG); }
272 exp : '+' exp %prec UNARY
273 { write_exp_elt_opcode (pstate, UNOP_PLUS); }
276 exp : '!' exp %prec UNARY
277 { write_exp_elt_opcode (pstate, UNOP_LOGICAL_NOT); }
280 exp : '~' exp %prec UNARY
281 { write_exp_elt_opcode (pstate, UNOP_COMPLEMENT); }
284 exp : INCREMENT exp %prec UNARY
285 { write_exp_elt_opcode (pstate, UNOP_PREINCREMENT); }
288 exp : DECREMENT exp %prec UNARY
289 { write_exp_elt_opcode (pstate, UNOP_PREDECREMENT); }
292 exp : exp INCREMENT %prec UNARY
293 { write_exp_elt_opcode (pstate, UNOP_POSTINCREMENT); }
296 exp : exp DECREMENT %prec UNARY
297 { write_exp_elt_opcode (pstate, UNOP_POSTDECREMENT); }
300 exp : TYPEID '(' exp ')' %prec UNARY
301 { write_exp_elt_opcode (pstate, OP_TYPEID); }
304 exp : TYPEID '(' type_exp ')' %prec UNARY
305 { write_exp_elt_opcode (pstate, OP_TYPEID); }
308 exp : SIZEOF exp %prec UNARY
309 { write_exp_elt_opcode (pstate, UNOP_SIZEOF); }
312 exp : ALIGNOF '(' type_exp ')' %prec UNARY
313 { write_exp_elt_opcode (pstate, UNOP_ALIGNOF); }
316 exp : exp ARROW field_name
317 { write_exp_elt_opcode (pstate, STRUCTOP_PTR);
318 write_exp_string (pstate, $3);
319 write_exp_elt_opcode (pstate, STRUCTOP_PTR); }
322 exp : exp ARROW field_name COMPLETE
323 { mark_struct_expression (pstate);
324 write_exp_elt_opcode (pstate, STRUCTOP_PTR);
325 write_exp_string (pstate, $3);
326 write_exp_elt_opcode (pstate, STRUCTOP_PTR); }
329 exp : exp ARROW COMPLETE
331 mark_struct_expression (pstate);
332 write_exp_elt_opcode (pstate, STRUCTOP_PTR);
335 write_exp_string (pstate, s);
336 write_exp_elt_opcode (pstate, STRUCTOP_PTR); }
339 exp : exp ARROW '~' name
340 { write_exp_elt_opcode (pstate, STRUCTOP_PTR);
341 write_destructor_name (pstate, $4);
342 write_exp_elt_opcode (pstate, STRUCTOP_PTR); }
345 exp : exp ARROW '~' name COMPLETE
346 { mark_struct_expression (pstate);
347 write_exp_elt_opcode (pstate, STRUCTOP_PTR);
348 write_destructor_name (pstate, $4);
349 write_exp_elt_opcode (pstate, STRUCTOP_PTR); }
352 exp : exp ARROW qualified_name
353 { /* exp->type::name becomes exp->*(&type::name) */
354 /* Note: this doesn't work if name is a
355 static member! FIXME */
356 write_exp_elt_opcode (pstate, UNOP_ADDR);
357 write_exp_elt_opcode (pstate, STRUCTOP_MPTR); }
360 exp : exp ARROW_STAR exp
361 { write_exp_elt_opcode (pstate, STRUCTOP_MPTR); }
364 exp : exp '.' field_name
365 { write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
366 write_exp_string (pstate, $3);
367 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
370 exp : exp '.' field_name COMPLETE
371 { mark_struct_expression (pstate);
372 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
373 write_exp_string (pstate, $3);
374 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
377 exp : exp '.' COMPLETE
379 mark_struct_expression (pstate);
380 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
383 write_exp_string (pstate, s);
384 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
387 exp : exp '.' '~' name
388 { write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
389 write_destructor_name (pstate, $4);
390 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
393 exp : exp '.' '~' name COMPLETE
394 { mark_struct_expression (pstate);
395 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
396 write_destructor_name (pstate, $4);
397 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
400 exp : exp '.' qualified_name
401 { /* exp.type::name becomes exp.*(&type::name) */
402 /* Note: this doesn't work if name is a
403 static member! FIXME */
404 write_exp_elt_opcode (pstate, UNOP_ADDR);
405 write_exp_elt_opcode (pstate, STRUCTOP_MEMBER); }
408 exp : exp DOT_STAR exp
409 { write_exp_elt_opcode (pstate, STRUCTOP_MEMBER); }
412 exp : exp '[' exp1 ']'
413 { write_exp_elt_opcode (pstate, BINOP_SUBSCRIPT); }
416 exp : exp OBJC_LBRAC exp1 ']'
417 { write_exp_elt_opcode (pstate, BINOP_SUBSCRIPT); }
421 * The rules below parse ObjC message calls of the form:
422 * '[' target selector {':' argument}* ']'
425 exp : OBJC_LBRAC TYPENAME
429 theclass = lookup_objc_class (parse_gdbarch (pstate),
430 copy_name ($2.stoken));
432 error (_("%s is not an ObjC Class"),
433 copy_name ($2.stoken));
434 write_exp_elt_opcode (pstate, OP_LONG);
435 write_exp_elt_type (pstate,
436 parse_type (pstate)->builtin_int);
437 write_exp_elt_longcst (pstate, (LONGEST) theclass);
438 write_exp_elt_opcode (pstate, OP_LONG);
442 { write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
443 end_msglist (pstate);
444 write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
448 exp : OBJC_LBRAC CLASSNAME
450 write_exp_elt_opcode (pstate, OP_LONG);
451 write_exp_elt_type (pstate,
452 parse_type (pstate)->builtin_int);
453 write_exp_elt_longcst (pstate, (LONGEST) $2.theclass);
454 write_exp_elt_opcode (pstate, OP_LONG);
458 { write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
459 end_msglist (pstate);
460 write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
467 { write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
468 end_msglist (pstate);
469 write_exp_elt_opcode (pstate, OP_OBJC_MSGCALL);
474 { add_msglist(&$1, 0); }
482 msgarg : name ':' exp
483 { add_msglist(&$1, 1); }
484 | ':' exp /* Unnamed arg. */
485 { add_msglist(0, 1); }
486 | ',' exp /* Variable number of args. */
487 { add_msglist(0, 0); }
491 /* This is to save the value of arglist_len
492 being accumulated by an outer function call. */
493 { start_arglist (); }
494 arglist ')' %prec ARROW
495 { write_exp_elt_opcode (pstate, OP_FUNCALL);
496 write_exp_elt_longcst (pstate,
497 (LONGEST) end_arglist ());
498 write_exp_elt_opcode (pstate, OP_FUNCALL); }
501 /* This is here to disambiguate with the production for
502 "func()::static_var" further below, which uses
503 function_method_void. */
504 exp : exp '(' ')' %prec ARROW
506 write_exp_elt_opcode (pstate, OP_FUNCALL);
507 write_exp_elt_longcst (pstate,
508 (LONGEST) end_arglist ());
509 write_exp_elt_opcode (pstate, OP_FUNCALL); }
513 exp : UNKNOWN_CPP_NAME '('
515 /* This could potentially be a an argument defined
516 lookup function (Koenig). */
517 write_exp_elt_opcode (pstate, OP_ADL_FUNC);
518 write_exp_elt_block (pstate,
519 expression_context_block);
520 write_exp_elt_sym (pstate,
521 NULL); /* Placeholder. */
522 write_exp_string (pstate, $1.stoken);
523 write_exp_elt_opcode (pstate, OP_ADL_FUNC);
525 /* This is to save the value of arglist_len
526 being accumulated by an outer function call. */
530 arglist ')' %prec ARROW
532 write_exp_elt_opcode (pstate, OP_FUNCALL);
533 write_exp_elt_longcst (pstate,
534 (LONGEST) end_arglist ());
535 write_exp_elt_opcode (pstate, OP_FUNCALL);
540 { start_arglist (); }
550 arglist : arglist ',' exp %prec ABOVE_COMMA
554 function_method: exp '(' parameter_typelist ')' const_or_volatile
556 VEC (type_ptr) *type_list = $3;
557 struct type *type_elt;
558 LONGEST len = VEC_length (type_ptr, type_list);
560 write_exp_elt_opcode (pstate, TYPE_INSTANCE);
561 /* Save the const/volatile qualifiers as
562 recorded by the const_or_volatile
563 production's actions. */
564 write_exp_elt_longcst (pstate,
565 follow_type_instance_flags ());
566 write_exp_elt_longcst (pstate, len);
568 VEC_iterate (type_ptr, type_list, i, type_elt);
570 write_exp_elt_type (pstate, type_elt);
571 write_exp_elt_longcst(pstate, len);
572 write_exp_elt_opcode (pstate, TYPE_INSTANCE);
573 VEC_free (type_ptr, type_list);
577 function_method_void: exp '(' ')' const_or_volatile
578 { write_exp_elt_opcode (pstate, TYPE_INSTANCE);
580 write_exp_elt_longcst (pstate,
581 follow_type_instance_flags ());
582 write_exp_elt_longcst (pstate, 0);
583 write_exp_elt_longcst (pstate, 0);
584 write_exp_elt_opcode (pstate, TYPE_INSTANCE);
588 exp : function_method
591 /* Normally we must interpret "func()" as a function call, instead of
592 a type. The user needs to write func(void) to disambiguate.
593 However, in the "func()::static_var" case, there's no
595 function_method_void_or_typelist: function_method
596 | function_method_void
599 exp : function_method_void_or_typelist COLONCOLON name
601 write_exp_elt_opcode (pstate, OP_FUNC_STATIC_VAR);
602 write_exp_string (pstate, $3);
603 write_exp_elt_opcode (pstate, OP_FUNC_STATIC_VAR);
608 { $$ = end_arglist () - 1; }
610 exp : lcurly arglist rcurly %prec ARROW
611 { write_exp_elt_opcode (pstate, OP_ARRAY);
612 write_exp_elt_longcst (pstate, (LONGEST) 0);
613 write_exp_elt_longcst (pstate, (LONGEST) $3);
614 write_exp_elt_opcode (pstate, OP_ARRAY); }
617 exp : lcurly type_exp rcurly exp %prec UNARY
618 { write_exp_elt_opcode (pstate, UNOP_MEMVAL_TYPE); }
621 exp : '(' type_exp ')' exp %prec UNARY
622 { write_exp_elt_opcode (pstate, UNOP_CAST_TYPE); }
629 /* Binary operators in order of decreasing precedence. */
632 { write_exp_elt_opcode (pstate, BINOP_REPEAT); }
636 { write_exp_elt_opcode (pstate, BINOP_MUL); }
640 { write_exp_elt_opcode (pstate, BINOP_DIV); }
644 { write_exp_elt_opcode (pstate, BINOP_REM); }
648 { write_exp_elt_opcode (pstate, BINOP_ADD); }
652 { write_exp_elt_opcode (pstate, BINOP_SUB); }
656 { write_exp_elt_opcode (pstate, BINOP_LSH); }
660 { write_exp_elt_opcode (pstate, BINOP_RSH); }
664 { write_exp_elt_opcode (pstate, BINOP_EQUAL); }
667 exp : exp NOTEQUAL exp
668 { write_exp_elt_opcode (pstate, BINOP_NOTEQUAL); }
672 { write_exp_elt_opcode (pstate, BINOP_LEQ); }
676 { write_exp_elt_opcode (pstate, BINOP_GEQ); }
680 { write_exp_elt_opcode (pstate, BINOP_LESS); }
684 { write_exp_elt_opcode (pstate, BINOP_GTR); }
688 { write_exp_elt_opcode (pstate, BINOP_BITWISE_AND); }
692 { write_exp_elt_opcode (pstate, BINOP_BITWISE_XOR); }
696 { write_exp_elt_opcode (pstate, BINOP_BITWISE_IOR); }
700 { write_exp_elt_opcode (pstate, BINOP_LOGICAL_AND); }
704 { write_exp_elt_opcode (pstate, BINOP_LOGICAL_OR); }
707 exp : exp '?' exp ':' exp %prec '?'
708 { write_exp_elt_opcode (pstate, TERNOP_COND); }
712 { write_exp_elt_opcode (pstate, BINOP_ASSIGN); }
715 exp : exp ASSIGN_MODIFY exp
716 { write_exp_elt_opcode (pstate, BINOP_ASSIGN_MODIFY);
717 write_exp_elt_opcode (pstate, $2);
718 write_exp_elt_opcode (pstate,
719 BINOP_ASSIGN_MODIFY); }
723 { write_exp_elt_opcode (pstate, OP_LONG);
724 write_exp_elt_type (pstate, $1.type);
725 write_exp_elt_longcst (pstate, (LONGEST) ($1.val));
726 write_exp_elt_opcode (pstate, OP_LONG); }
731 struct stoken_vector vec;
734 write_exp_string_vector (pstate, $1.type, &vec);
740 parse_number (pstate, $1.stoken.ptr,
741 $1.stoken.length, 0, &val);
742 write_exp_elt_opcode (pstate, OP_LONG);
743 write_exp_elt_type (pstate, val.typed_val_int.type);
744 write_exp_elt_longcst (pstate,
745 (LONGEST) val.typed_val_int.val);
746 write_exp_elt_opcode (pstate, OP_LONG);
752 { write_exp_elt_opcode (pstate, OP_FLOAT);
753 write_exp_elt_type (pstate, $1.type);
754 write_exp_elt_floatcst (pstate, $1.val);
755 write_exp_elt_opcode (pstate, OP_FLOAT); }
763 write_dollar_variable (pstate, $1);
767 exp : SELECTOR '(' name ')'
769 write_exp_elt_opcode (pstate, OP_OBJC_SELECTOR);
770 write_exp_string (pstate, $3);
771 write_exp_elt_opcode (pstate, OP_OBJC_SELECTOR); }
774 exp : SIZEOF '(' type ')' %prec UNARY
775 { struct type *type = $3;
776 write_exp_elt_opcode (pstate, OP_LONG);
777 write_exp_elt_type (pstate, lookup_signed_typename
778 (parse_language (pstate),
779 parse_gdbarch (pstate),
781 type = check_typedef (type);
783 /* $5.3.3/2 of the C++ Standard (n3290 draft)
784 says of sizeof: "When applied to a reference
785 or a reference type, the result is the size of
786 the referenced type." */
787 if (TYPE_IS_REFERENCE (type))
788 type = check_typedef (TYPE_TARGET_TYPE (type));
789 write_exp_elt_longcst (pstate,
790 (LONGEST) TYPE_LENGTH (type));
791 write_exp_elt_opcode (pstate, OP_LONG); }
794 exp : REINTERPRET_CAST '<' type_exp '>' '(' exp ')' %prec UNARY
795 { write_exp_elt_opcode (pstate,
796 UNOP_REINTERPRET_CAST); }
799 exp : STATIC_CAST '<' type_exp '>' '(' exp ')' %prec UNARY
800 { write_exp_elt_opcode (pstate, UNOP_CAST_TYPE); }
803 exp : DYNAMIC_CAST '<' type_exp '>' '(' exp ')' %prec UNARY
804 { write_exp_elt_opcode (pstate, UNOP_DYNAMIC_CAST); }
807 exp : CONST_CAST '<' type_exp '>' '(' exp ')' %prec UNARY
808 { /* We could do more error checking here, but
809 it doesn't seem worthwhile. */
810 write_exp_elt_opcode (pstate, UNOP_CAST_TYPE); }
816 /* We copy the string here, and not in the
817 lexer, to guarantee that we do not leak a
818 string. Note that we follow the
819 NUL-termination convention of the
821 struct typed_stoken *vec = XNEW (struct typed_stoken);
826 vec->length = $1.length;
827 vec->ptr = (char *) malloc ($1.length + 1);
828 memcpy (vec->ptr, $1.ptr, $1.length + 1);
833 /* Note that we NUL-terminate here, but just
837 $$.tokens = XRESIZEVEC (struct typed_stoken,
840 p = (char *) malloc ($2.length + 1);
841 memcpy (p, $2.ptr, $2.length + 1);
843 $$.tokens[$$.len - 1].type = $2.type;
844 $$.tokens[$$.len - 1].length = $2.length;
845 $$.tokens[$$.len - 1].ptr = p;
852 c_string_type type = C_STRING;
854 for (i = 0; i < $1.len; ++i)
856 switch ($1.tokens[i].type)
864 && type != $1.tokens[i].type)
865 error (_("Undefined string concatenation."));
866 type = (enum c_string_type_values) $1.tokens[i].type;
870 internal_error (__FILE__, __LINE__,
871 "unrecognized type in string concatenation");
875 write_exp_string_vector (pstate, type, &$1);
876 for (i = 0; i < $1.len; ++i)
877 free ($1.tokens[i].ptr);
882 exp : NSSTRING /* ObjC NextStep NSString constant
883 * of the form '@' '"' string '"'.
885 { write_exp_elt_opcode (pstate, OP_OBJC_NSSTRING);
886 write_exp_string (pstate, $1);
887 write_exp_elt_opcode (pstate, OP_OBJC_NSSTRING); }
892 { write_exp_elt_opcode (pstate, OP_LONG);
893 write_exp_elt_type (pstate,
894 parse_type (pstate)->builtin_bool);
895 write_exp_elt_longcst (pstate, (LONGEST) 1);
896 write_exp_elt_opcode (pstate, OP_LONG); }
900 { write_exp_elt_opcode (pstate, OP_LONG);
901 write_exp_elt_type (pstate,
902 parse_type (pstate)->builtin_bool);
903 write_exp_elt_longcst (pstate, (LONGEST) 0);
904 write_exp_elt_opcode (pstate, OP_LONG); }
912 $$ = SYMBOL_BLOCK_VALUE ($1.sym.symbol);
914 error (_("No file or function \"%s\"."),
915 copy_name ($1.stoken));
923 block : block COLONCOLON name
925 = lookup_symbol (copy_name ($3), $1,
926 VAR_DOMAIN, NULL).symbol;
928 if (!tem || SYMBOL_CLASS (tem) != LOC_BLOCK)
929 error (_("No function \"%s\" in specified context."),
931 $$ = SYMBOL_BLOCK_VALUE (tem); }
934 variable: name_not_typename ENTRY
935 { struct symbol *sym = $1.sym.symbol;
937 if (sym == NULL || !SYMBOL_IS_ARGUMENT (sym)
938 || !symbol_read_needs_frame (sym))
939 error (_("@entry can be used only for function "
940 "parameters, not for \"%s\""),
941 copy_name ($1.stoken));
943 write_exp_elt_opcode (pstate, OP_VAR_ENTRY_VALUE);
944 write_exp_elt_sym (pstate, sym);
945 write_exp_elt_opcode (pstate, OP_VAR_ENTRY_VALUE);
949 variable: block COLONCOLON name
950 { struct block_symbol sym
951 = lookup_symbol (copy_name ($3), $1,
955 error (_("No symbol \"%s\" in specified context."),
957 if (symbol_read_needs_frame (sym.symbol))
959 innermost_block.update (sym);
961 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
962 write_exp_elt_block (pstate, sym.block);
963 write_exp_elt_sym (pstate, sym.symbol);
964 write_exp_elt_opcode (pstate, OP_VAR_VALUE); }
967 qualified_name: TYPENAME COLONCOLON name
969 struct type *type = $1.type;
970 type = check_typedef (type);
971 if (!type_aggregate_p (type))
972 error (_("`%s' is not defined as an aggregate type."),
973 TYPE_SAFE_NAME (type));
975 write_exp_elt_opcode (pstate, OP_SCOPE);
976 write_exp_elt_type (pstate, type);
977 write_exp_string (pstate, $3);
978 write_exp_elt_opcode (pstate, OP_SCOPE);
980 | TYPENAME COLONCOLON '~' name
982 struct type *type = $1.type;
983 struct stoken tmp_token;
986 type = check_typedef (type);
987 if (!type_aggregate_p (type))
988 error (_("`%s' is not defined as an aggregate type."),
989 TYPE_SAFE_NAME (type));
990 buf = (char *) alloca ($4.length + 2);
992 tmp_token.length = $4.length + 1;
994 memcpy (buf+1, $4.ptr, $4.length);
995 buf[tmp_token.length] = 0;
997 /* Check for valid destructor name. */
998 destructor_name_p (tmp_token.ptr, $1.type);
999 write_exp_elt_opcode (pstate, OP_SCOPE);
1000 write_exp_elt_type (pstate, type);
1001 write_exp_string (pstate, tmp_token);
1002 write_exp_elt_opcode (pstate, OP_SCOPE);
1004 | TYPENAME COLONCOLON name COLONCOLON name
1006 char *copy = copy_name ($3);
1007 error (_("No type \"%s\" within class "
1008 "or namespace \"%s\"."),
1009 copy, TYPE_SAFE_NAME ($1.type));
1013 variable: qualified_name
1014 | COLONCOLON name_not_typename
1016 char *name = copy_name ($2.stoken);
1018 struct bound_minimal_symbol msymbol;
1021 = lookup_symbol (name, (const struct block *) NULL,
1022 VAR_DOMAIN, NULL).symbol;
1025 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1026 write_exp_elt_block (pstate, NULL);
1027 write_exp_elt_sym (pstate, sym);
1028 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1032 msymbol = lookup_bound_minimal_symbol (name);
1033 if (msymbol.minsym != NULL)
1034 write_exp_msymbol (pstate, msymbol);
1035 else if (!have_full_symbols () && !have_partial_symbols ())
1036 error (_("No symbol table is loaded. Use the \"file\" command."));
1038 error (_("No symbol \"%s\" in current context."), name);
1042 variable: name_not_typename
1043 { struct block_symbol sym = $1.sym;
1047 if (symbol_read_needs_frame (sym.symbol))
1048 innermost_block.update (sym);
1050 /* If we found a function, see if it's
1051 an ifunc resolver that has the same
1052 address as the ifunc symbol itself.
1053 If so, prefer the ifunc symbol. */
1055 bound_minimal_symbol resolver
1056 = find_gnu_ifunc (sym.symbol);
1057 if (resolver.minsym != NULL)
1058 write_exp_msymbol (pstate, resolver);
1061 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1062 write_exp_elt_block (pstate, sym.block);
1063 write_exp_elt_sym (pstate, sym.symbol);
1064 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1067 else if ($1.is_a_field_of_this)
1069 /* C++: it hangs off of `this'. Must
1070 not inadvertently convert from a method call
1072 innermost_block.update (sym);
1073 write_exp_elt_opcode (pstate, OP_THIS);
1074 write_exp_elt_opcode (pstate, OP_THIS);
1075 write_exp_elt_opcode (pstate, STRUCTOP_PTR);
1076 write_exp_string (pstate, $1.stoken);
1077 write_exp_elt_opcode (pstate, STRUCTOP_PTR);
1081 char *arg = copy_name ($1.stoken);
1083 bound_minimal_symbol msymbol
1084 = lookup_bound_minimal_symbol (arg);
1085 if (msymbol.minsym == NULL)
1087 if (!have_full_symbols () && !have_partial_symbols ())
1088 error (_("No symbol table is loaded. Use the \"file\" command."));
1090 error (_("No symbol \"%s\" in current context."),
1091 copy_name ($1.stoken));
1094 /* This minsym might be an alias for
1095 another function. See if we can find
1096 the debug symbol for the target, and
1097 if so, use it instead, since it has
1098 return type / prototype info. This
1099 is important for example for "p
1100 *__errno_location()". */
1101 symbol *alias_target
1102 = ((msymbol.minsym->type != mst_text_gnu_ifunc
1103 && msymbol.minsym->type != mst_data_gnu_ifunc)
1104 ? find_function_alias_target (msymbol)
1106 if (alias_target != NULL)
1108 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1110 (pstate, SYMBOL_BLOCK_VALUE (alias_target));
1111 write_exp_elt_sym (pstate, alias_target);
1112 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
1115 write_exp_msymbol (pstate, msymbol);
1120 space_identifier : '@' NAME
1121 { insert_type_address_space (pstate, copy_name ($2.stoken)); }
1124 const_or_volatile: const_or_volatile_noopt
1128 cv_with_space_id : const_or_volatile space_identifier const_or_volatile
1131 const_or_volatile_or_space_identifier_noopt: cv_with_space_id
1132 | const_or_volatile_noopt
1135 const_or_volatile_or_space_identifier:
1136 const_or_volatile_or_space_identifier_noopt
1142 { insert_type (tp_pointer); }
1143 const_or_volatile_or_space_identifier
1145 { insert_type (tp_pointer); }
1146 const_or_volatile_or_space_identifier
1148 { insert_type (tp_reference); }
1150 { insert_type (tp_reference); }
1152 { insert_type (tp_rvalue_reference); }
1153 | ANDAND ptr_operator
1154 { insert_type (tp_rvalue_reference); }
1157 ptr_operator_ts: ptr_operator
1159 $$ = get_type_stack ();
1160 /* This cleanup is eventually run by
1162 make_cleanup (type_stack_cleanup, $$);
1166 abs_decl: ptr_operator_ts direct_abs_decl
1167 { $$ = append_type_stack ($2, $1); }
1172 direct_abs_decl: '(' abs_decl ')'
1174 | direct_abs_decl array_mod
1176 push_type_stack ($1);
1178 push_type (tp_array);
1179 $$ = get_type_stack ();
1184 push_type (tp_array);
1185 $$ = get_type_stack ();
1188 | direct_abs_decl func_mod
1190 push_type_stack ($1);
1192 $$ = get_type_stack ();
1197 $$ = get_type_stack ();
1207 | OBJC_LBRAC INT ']'
1213 | '(' parameter_typelist ')'
1217 /* We used to try to recognize pointer to member types here, but
1218 that didn't work (shift/reduce conflicts meant that these rules never
1219 got executed). The problem is that
1220 int (foo::bar::baz::bizzle)
1221 is a function type but
1222 int (foo::bar::baz::bizzle::*)
1223 is a pointer to member type. Stroustrup loses again! */
1228 /* Implements (approximately): (type-qualifier)* type-specifier.
1230 When type-specifier is only ever a single word, like 'float' then these
1231 arrive as pre-built TYPENAME tokens thanks to the classify_name
1232 function. However, when a type-specifier can contain multiple words,
1233 for example 'double' can appear as just 'double' or 'long double', and
1234 similarly 'long' can appear as just 'long' or in 'long double', then
1235 these type-specifiers are parsed into their own tokens in the function
1236 lex_one_token and the ident_tokens array. These separate tokens are all
1242 { $$ = lookup_signed_typename (parse_language (pstate),
1243 parse_gdbarch (pstate),
1246 { $$ = lookup_signed_typename (parse_language (pstate),
1247 parse_gdbarch (pstate),
1250 { $$ = lookup_signed_typename (parse_language (pstate),
1251 parse_gdbarch (pstate),
1254 { $$ = lookup_signed_typename (parse_language (pstate),
1255 parse_gdbarch (pstate),
1257 | LONG SIGNED_KEYWORD INT_KEYWORD
1258 { $$ = lookup_signed_typename (parse_language (pstate),
1259 parse_gdbarch (pstate),
1261 | LONG SIGNED_KEYWORD
1262 { $$ = lookup_signed_typename (parse_language (pstate),
1263 parse_gdbarch (pstate),
1265 | SIGNED_KEYWORD LONG INT_KEYWORD
1266 { $$ = lookup_signed_typename (parse_language (pstate),
1267 parse_gdbarch (pstate),
1269 | UNSIGNED LONG INT_KEYWORD
1270 { $$ = lookup_unsigned_typename (parse_language (pstate),
1271 parse_gdbarch (pstate),
1273 | LONG UNSIGNED INT_KEYWORD
1274 { $$ = lookup_unsigned_typename (parse_language (pstate),
1275 parse_gdbarch (pstate),
1278 { $$ = lookup_unsigned_typename (parse_language (pstate),
1279 parse_gdbarch (pstate),
1282 { $$ = lookup_signed_typename (parse_language (pstate),
1283 parse_gdbarch (pstate),
1285 | LONG LONG INT_KEYWORD
1286 { $$ = lookup_signed_typename (parse_language (pstate),
1287 parse_gdbarch (pstate),
1289 | LONG LONG SIGNED_KEYWORD INT_KEYWORD
1290 { $$ = lookup_signed_typename (parse_language (pstate),
1291 parse_gdbarch (pstate),
1293 | LONG LONG SIGNED_KEYWORD
1294 { $$ = lookup_signed_typename (parse_language (pstate),
1295 parse_gdbarch (pstate),
1297 | SIGNED_KEYWORD LONG LONG
1298 { $$ = lookup_signed_typename (parse_language (pstate),
1299 parse_gdbarch (pstate),
1301 | SIGNED_KEYWORD LONG LONG INT_KEYWORD
1302 { $$ = lookup_signed_typename (parse_language (pstate),
1303 parse_gdbarch (pstate),
1305 | UNSIGNED LONG LONG
1306 { $$ = lookup_unsigned_typename (parse_language (pstate),
1307 parse_gdbarch (pstate),
1309 | UNSIGNED LONG LONG INT_KEYWORD
1310 { $$ = lookup_unsigned_typename (parse_language (pstate),
1311 parse_gdbarch (pstate),
1313 | LONG LONG UNSIGNED
1314 { $$ = lookup_unsigned_typename (parse_language (pstate),
1315 parse_gdbarch (pstate),
1317 | LONG LONG UNSIGNED INT_KEYWORD
1318 { $$ = lookup_unsigned_typename (parse_language (pstate),
1319 parse_gdbarch (pstate),
1322 { $$ = lookup_signed_typename (parse_language (pstate),
1323 parse_gdbarch (pstate),
1325 | SHORT SIGNED_KEYWORD INT_KEYWORD
1326 { $$ = lookup_signed_typename (parse_language (pstate),
1327 parse_gdbarch (pstate),
1329 | SHORT SIGNED_KEYWORD
1330 { $$ = lookup_signed_typename (parse_language (pstate),
1331 parse_gdbarch (pstate),
1333 | UNSIGNED SHORT INT_KEYWORD
1334 { $$ = lookup_unsigned_typename (parse_language (pstate),
1335 parse_gdbarch (pstate),
1338 { $$ = lookup_unsigned_typename (parse_language (pstate),
1339 parse_gdbarch (pstate),
1341 | SHORT UNSIGNED INT_KEYWORD
1342 { $$ = lookup_unsigned_typename (parse_language (pstate),
1343 parse_gdbarch (pstate),
1346 { $$ = lookup_typename (parse_language (pstate),
1347 parse_gdbarch (pstate),
1349 (struct block *) NULL,
1351 | LONG DOUBLE_KEYWORD
1352 { $$ = lookup_typename (parse_language (pstate),
1353 parse_gdbarch (pstate),
1355 (struct block *) NULL,
1358 { $$ = lookup_struct (copy_name ($2),
1359 expression_context_block); }
1362 mark_completion_tag (TYPE_CODE_STRUCT, "", 0);
1365 | STRUCT name COMPLETE
1367 mark_completion_tag (TYPE_CODE_STRUCT, $2.ptr,
1372 { $$ = lookup_struct (copy_name ($2),
1373 expression_context_block); }
1376 mark_completion_tag (TYPE_CODE_STRUCT, "", 0);
1379 | CLASS name COMPLETE
1381 mark_completion_tag (TYPE_CODE_STRUCT, $2.ptr,
1386 { $$ = lookup_union (copy_name ($2),
1387 expression_context_block); }
1390 mark_completion_tag (TYPE_CODE_UNION, "", 0);
1393 | UNION name COMPLETE
1395 mark_completion_tag (TYPE_CODE_UNION, $2.ptr,
1400 { $$ = lookup_enum (copy_name ($2),
1401 expression_context_block); }
1404 mark_completion_tag (TYPE_CODE_ENUM, "", 0);
1407 | ENUM name COMPLETE
1409 mark_completion_tag (TYPE_CODE_ENUM, $2.ptr,
1413 | UNSIGNED type_name
1414 { $$ = lookup_unsigned_typename (parse_language (pstate),
1415 parse_gdbarch (pstate),
1416 TYPE_NAME($2.type)); }
1418 { $$ = lookup_unsigned_typename (parse_language (pstate),
1419 parse_gdbarch (pstate),
1421 | SIGNED_KEYWORD type_name
1422 { $$ = lookup_signed_typename (parse_language (pstate),
1423 parse_gdbarch (pstate),
1424 TYPE_NAME($2.type)); }
1426 { $$ = lookup_signed_typename (parse_language (pstate),
1427 parse_gdbarch (pstate),
1429 /* It appears that this rule for templates is never
1430 reduced; template recognition happens by lookahead
1431 in the token processing code in yylex. */
1432 | TEMPLATE name '<' type '>'
1433 { $$ = lookup_template_type(copy_name($2), $4,
1434 expression_context_block);
1436 | const_or_volatile_or_space_identifier_noopt typebase
1437 { $$ = follow_types ($2); }
1438 | typebase const_or_volatile_or_space_identifier_noopt
1439 { $$ = follow_types ($1); }
1445 $$.stoken.ptr = "int";
1446 $$.stoken.length = 3;
1447 $$.type = lookup_signed_typename (parse_language (pstate),
1448 parse_gdbarch (pstate),
1453 $$.stoken.ptr = "long";
1454 $$.stoken.length = 4;
1455 $$.type = lookup_signed_typename (parse_language (pstate),
1456 parse_gdbarch (pstate),
1461 $$.stoken.ptr = "short";
1462 $$.stoken.length = 5;
1463 $$.type = lookup_signed_typename (parse_language (pstate),
1464 parse_gdbarch (pstate),
1471 { check_parameter_typelist ($1); }
1472 | nonempty_typelist ',' DOTDOTDOT
1474 VEC_safe_push (type_ptr, $1, NULL);
1475 check_parameter_typelist ($1);
1483 VEC (type_ptr) *typelist = NULL;
1484 VEC_safe_push (type_ptr, typelist, $1);
1487 | nonempty_typelist ',' type
1489 VEC_safe_push (type_ptr, $1, $3);
1497 push_type_stack ($2);
1498 $$ = follow_types ($1);
1502 conversion_type_id: typebase conversion_declarator
1503 { $$ = follow_types ($1); }
1506 conversion_declarator: /* Nothing. */
1507 | ptr_operator conversion_declarator
1510 const_and_volatile: CONST_KEYWORD VOLATILE_KEYWORD
1511 | VOLATILE_KEYWORD CONST_KEYWORD
1514 const_or_volatile_noopt: const_and_volatile
1515 { insert_type (tp_const);
1516 insert_type (tp_volatile);
1519 { insert_type (tp_const); }
1521 { insert_type (tp_volatile); }
1525 { $$ = operator_stoken (" new"); }
1527 { $$ = operator_stoken (" delete"); }
1528 | OPERATOR NEW '[' ']'
1529 { $$ = operator_stoken (" new[]"); }
1530 | OPERATOR DELETE '[' ']'
1531 { $$ = operator_stoken (" delete[]"); }
1532 | OPERATOR NEW OBJC_LBRAC ']'
1533 { $$ = operator_stoken (" new[]"); }
1534 | OPERATOR DELETE OBJC_LBRAC ']'
1535 { $$ = operator_stoken (" delete[]"); }
1537 { $$ = operator_stoken ("+"); }
1539 { $$ = operator_stoken ("-"); }
1541 { $$ = operator_stoken ("*"); }
1543 { $$ = operator_stoken ("/"); }
1545 { $$ = operator_stoken ("%"); }
1547 { $$ = operator_stoken ("^"); }
1549 { $$ = operator_stoken ("&"); }
1551 { $$ = operator_stoken ("|"); }
1553 { $$ = operator_stoken ("~"); }
1555 { $$ = operator_stoken ("!"); }
1557 { $$ = operator_stoken ("="); }
1559 { $$ = operator_stoken ("<"); }
1561 { $$ = operator_stoken (">"); }
1562 | OPERATOR ASSIGN_MODIFY
1563 { const char *op = " unknown";
1587 case BINOP_BITWISE_IOR:
1590 case BINOP_BITWISE_AND:
1593 case BINOP_BITWISE_XOR:
1600 $$ = operator_stoken (op);
1603 { $$ = operator_stoken ("<<"); }
1605 { $$ = operator_stoken (">>"); }
1607 { $$ = operator_stoken ("=="); }
1609 { $$ = operator_stoken ("!="); }
1611 { $$ = operator_stoken ("<="); }
1613 { $$ = operator_stoken (">="); }
1615 { $$ = operator_stoken ("&&"); }
1617 { $$ = operator_stoken ("||"); }
1618 | OPERATOR INCREMENT
1619 { $$ = operator_stoken ("++"); }
1620 | OPERATOR DECREMENT
1621 { $$ = operator_stoken ("--"); }
1623 { $$ = operator_stoken (","); }
1624 | OPERATOR ARROW_STAR
1625 { $$ = operator_stoken ("->*"); }
1627 { $$ = operator_stoken ("->"); }
1629 { $$ = operator_stoken ("()"); }
1631 { $$ = operator_stoken ("[]"); }
1632 | OPERATOR OBJC_LBRAC ']'
1633 { $$ = operator_stoken ("[]"); }
1634 | OPERATOR conversion_type_id
1637 c_print_type ($2, NULL, &buf, -1, 0,
1638 &type_print_raw_options);
1640 /* This also needs canonicalization. */
1642 = cp_canonicalize_string (buf.c_str ());
1644 canon = std::move (buf.string ());
1645 $$ = operator_stoken ((" " + canon).c_str ());
1649 /* This rule exists in order to allow some tokens that would not normally
1650 match the 'name' rule to appear as fields within a struct. The example
1651 that initially motivated this was the RISC-V target which models the
1652 floating point registers as a union with fields called 'float' and
1653 'double'. The 'float' string becomes a TYPENAME token and can appear
1654 anywhere a 'name' can, however 'double' is its own token,
1655 DOUBLE_KEYWORD, and doesn't match the 'name' rule.*/
1658 | DOUBLE_KEYWORD { $$ = typename_stoken ("double"); }
1659 | INT_KEYWORD { $$ = typename_stoken ("int"); }
1660 | LONG { $$ = typename_stoken ("long"); }
1661 | SHORT { $$ = typename_stoken ("short"); }
1662 | SIGNED_KEYWORD { $$ = typename_stoken ("signed"); }
1663 | UNSIGNED { $$ = typename_stoken ("unsigned"); }
1666 name : NAME { $$ = $1.stoken; }
1667 | BLOCKNAME { $$ = $1.stoken; }
1668 | TYPENAME { $$ = $1.stoken; }
1669 | NAME_OR_INT { $$ = $1.stoken; }
1670 | UNKNOWN_CPP_NAME { $$ = $1.stoken; }
1674 name_not_typename : NAME
1676 /* These would be useful if name_not_typename was useful, but it is just
1677 a fake for "variable", so these cause reduce/reduce conflicts because
1678 the parser can't tell whether NAME_OR_INT is a name_not_typename (=variable,
1679 =exp) or just an exp. If name_not_typename was ever used in an lvalue
1680 context where only a name could occur, this might be useful.
1685 struct field_of_this_result is_a_field_of_this;
1688 $$.sym = lookup_symbol ($1.ptr,
1689 expression_context_block,
1691 &is_a_field_of_this);
1692 $$.is_a_field_of_this
1693 = is_a_field_of_this.type != NULL;
1700 /* Like write_exp_string, but prepends a '~'. */
1703 write_destructor_name (struct parser_state *par_state, struct stoken token)
1705 char *copy = (char *) alloca (token.length + 1);
1708 memcpy (©[1], token.ptr, token.length);
1713 write_exp_string (par_state, token);
1716 /* Returns a stoken of the operator name given by OP (which does not
1717 include the string "operator"). */
1719 static struct stoken
1720 operator_stoken (const char *op)
1722 struct stoken st = { NULL, 0 };
1725 st.length = CP_OPERATOR_LEN + strlen (op);
1726 buf = (char *) malloc (st.length + 1);
1727 strcpy (buf, CP_OPERATOR_STR);
1731 /* The toplevel (c_parse) will free the memory allocated here. */
1732 make_cleanup (free, buf);
1736 /* Returns a stoken of the type named TYPE. */
1738 static struct stoken
1739 typename_stoken (const char *type)
1741 struct stoken st = { type, 0 };
1742 st.length = strlen (type);
1746 /* Return true if the type is aggregate-like. */
1749 type_aggregate_p (struct type *type)
1751 return (TYPE_CODE (type) == TYPE_CODE_STRUCT
1752 || TYPE_CODE (type) == TYPE_CODE_UNION
1753 || TYPE_CODE (type) == TYPE_CODE_NAMESPACE
1754 || (TYPE_CODE (type) == TYPE_CODE_ENUM
1755 && TYPE_DECLARED_CLASS (type)));
1758 /* Validate a parameter typelist. */
1761 check_parameter_typelist (VEC (type_ptr) *params)
1766 for (ix = 0; VEC_iterate (type_ptr, params, ix, type); ++ix)
1768 if (type != NULL && TYPE_CODE (check_typedef (type)) == TYPE_CODE_VOID)
1772 if (VEC_length (type_ptr, params) == 1)
1777 VEC_free (type_ptr, params);
1778 error (_("parameter types following 'void'"));
1782 VEC_free (type_ptr, params);
1783 error (_("'void' invalid as parameter type"));
1789 /* Take care of parsing a number (anything that starts with a digit).
1790 Set yylval and return the token type; update lexptr.
1791 LEN is the number of characters in it. */
1793 /*** Needs some error checking for the float case ***/
1796 parse_number (struct parser_state *par_state,
1797 const char *buf, int len, int parsed_float, YYSTYPE *putithere)
1805 int base = input_radix;
1808 /* Number of "L" suffixes encountered. */
1811 /* We have found a "L" or "U" suffix. */
1812 int found_suffix = 0;
1815 struct type *signed_type;
1816 struct type *unsigned_type;
1819 p = (char *) alloca (len);
1820 memcpy (p, buf, len);
1824 /* Handle suffixes for decimal floating-point: "df", "dd" or "dl". */
1825 if (len >= 2 && p[len - 2] == 'd' && p[len - 1] == 'f')
1827 putithere->typed_val_float.type
1828 = parse_type (par_state)->builtin_decfloat;
1831 else if (len >= 2 && p[len - 2] == 'd' && p[len - 1] == 'd')
1833 putithere->typed_val_float.type
1834 = parse_type (par_state)->builtin_decdouble;
1837 else if (len >= 2 && p[len - 2] == 'd' && p[len - 1] == 'l')
1839 putithere->typed_val_float.type
1840 = parse_type (par_state)->builtin_declong;
1843 /* Handle suffixes: 'f' for float, 'l' for long double. */
1844 else if (len >= 1 && TOLOWER (p[len - 1]) == 'f')
1846 putithere->typed_val_float.type
1847 = parse_type (par_state)->builtin_float;
1850 else if (len >= 1 && TOLOWER (p[len - 1]) == 'l')
1852 putithere->typed_val_float.type
1853 = parse_type (par_state)->builtin_long_double;
1856 /* Default type for floating-point literals is double. */
1859 putithere->typed_val_float.type
1860 = parse_type (par_state)->builtin_double;
1863 if (!parse_float (p, len,
1864 putithere->typed_val_float.type,
1865 putithere->typed_val_float.val))
1870 /* Handle base-switching prefixes 0x, 0t, 0d, 0 */
1871 if (p[0] == '0' && len > 1)
1914 if (c >= 'A' && c <= 'Z')
1916 if (c != 'l' && c != 'u')
1918 if (c >= '0' && c <= '9')
1926 if (base > 10 && c >= 'a' && c <= 'f')
1930 n += i = c - 'a' + 10;
1943 return ERROR; /* Char not a digit */
1946 return ERROR; /* Invalid digit in this base */
1948 /* Portably test for overflow (only works for nonzero values, so make
1949 a second check for zero). FIXME: Can't we just make n and prevn
1950 unsigned and avoid this? */
1951 if (c != 'l' && c != 'u' && (prevn >= n) && n != 0)
1952 unsigned_p = 1; /* Try something unsigned */
1954 /* Portably test for unsigned overflow.
1955 FIXME: This check is wrong; for example it doesn't find overflow
1956 on 0x123456789 when LONGEST is 32 bits. */
1957 if (c != 'l' && c != 'u' && n != 0)
1959 if (unsigned_p && prevn >= n)
1960 error (_("Numeric constant too large."));
1965 /* An integer constant is an int, a long, or a long long. An L
1966 suffix forces it to be long; an LL suffix forces it to be long
1967 long. If not forced to a larger size, it gets the first type of
1968 the above that it fits in. To figure out whether it fits, we
1969 shift it right and see whether anything remains. Note that we
1970 can't shift sizeof (LONGEST) * HOST_CHAR_BIT bits or more in one
1971 operation, because many compilers will warn about such a shift
1972 (which always produces a zero result). Sometimes gdbarch_int_bit
1973 or gdbarch_long_bit will be that big, sometimes not. To deal with
1974 the case where it is we just always shift the value more than
1975 once, with fewer bits each time. */
1979 && (un >> (gdbarch_int_bit (parse_gdbarch (par_state)) - 2)) == 0)
1982 = ((ULONGEST)1) << (gdbarch_int_bit (parse_gdbarch (par_state)) - 1);
1984 /* A large decimal (not hex or octal) constant (between INT_MAX
1985 and UINT_MAX) is a long or unsigned long, according to ANSI,
1986 never an unsigned int, but this code treats it as unsigned
1987 int. This probably should be fixed. GCC gives a warning on
1990 unsigned_type = parse_type (par_state)->builtin_unsigned_int;
1991 signed_type = parse_type (par_state)->builtin_int;
1993 else if (long_p <= 1
1994 && (un >> (gdbarch_long_bit (parse_gdbarch (par_state)) - 2)) == 0)
1997 = ((ULONGEST)1) << (gdbarch_long_bit (parse_gdbarch (par_state)) - 1);
1998 unsigned_type = parse_type (par_state)->builtin_unsigned_long;
1999 signed_type = parse_type (par_state)->builtin_long;
2004 if (sizeof (ULONGEST) * HOST_CHAR_BIT
2005 < gdbarch_long_long_bit (parse_gdbarch (par_state)))
2006 /* A long long does not fit in a LONGEST. */
2007 shift = (sizeof (ULONGEST) * HOST_CHAR_BIT - 1);
2009 shift = (gdbarch_long_long_bit (parse_gdbarch (par_state)) - 1);
2010 high_bit = (ULONGEST) 1 << shift;
2011 unsigned_type = parse_type (par_state)->builtin_unsigned_long_long;
2012 signed_type = parse_type (par_state)->builtin_long_long;
2015 putithere->typed_val_int.val = n;
2017 /* If the high bit of the worked out type is set then this number
2018 has to be unsigned. */
2020 if (unsigned_p || (n & high_bit))
2022 putithere->typed_val_int.type = unsigned_type;
2026 putithere->typed_val_int.type = signed_type;
2032 /* Temporary obstack used for holding strings. */
2033 static struct obstack tempbuf;
2034 static int tempbuf_init;
2036 /* Parse a C escape sequence. The initial backslash of the sequence
2037 is at (*PTR)[-1]. *PTR will be updated to point to just after the
2038 last character of the sequence. If OUTPUT is not NULL, the
2039 translated form of the escape sequence will be written there. If
2040 OUTPUT is NULL, no output is written and the call will only affect
2041 *PTR. If an escape sequence is expressed in target bytes, then the
2042 entire sequence will simply be copied to OUTPUT. Return 1 if any
2043 character was emitted, 0 otherwise. */
2046 c_parse_escape (const char **ptr, struct obstack *output)
2048 const char *tokptr = *ptr;
2051 /* Some escape sequences undergo character set conversion. Those we
2055 /* Hex escapes do not undergo character set conversion, so keep
2056 the escape sequence for later. */
2059 obstack_grow_str (output, "\\x");
2061 if (!ISXDIGIT (*tokptr))
2062 error (_("\\x escape without a following hex digit"));
2063 while (ISXDIGIT (*tokptr))
2066 obstack_1grow (output, *tokptr);
2071 /* Octal escapes do not undergo character set conversion, so
2072 keep the escape sequence for later. */
2084 obstack_grow_str (output, "\\");
2086 i < 3 && ISDIGIT (*tokptr) && *tokptr != '8' && *tokptr != '9';
2090 obstack_1grow (output, *tokptr);
2096 /* We handle UCNs later. We could handle them here, but that
2097 would mean a spurious error in the case where the UCN could
2098 be converted to the target charset but not the host
2104 int i, len = c == 'U' ? 8 : 4;
2107 obstack_1grow (output, '\\');
2108 obstack_1grow (output, *tokptr);
2111 if (!ISXDIGIT (*tokptr))
2112 error (_("\\%c escape without a following hex digit"), c);
2113 for (i = 0; i < len && ISXDIGIT (*tokptr); ++i)
2116 obstack_1grow (output, *tokptr);
2122 /* We must pass backslash through so that it does not
2123 cause quoting during the second expansion. */
2126 obstack_grow_str (output, "\\\\");
2130 /* Escapes which undergo conversion. */
2133 obstack_1grow (output, '\a');
2138 obstack_1grow (output, '\b');
2143 obstack_1grow (output, '\f');
2148 obstack_1grow (output, '\n');
2153 obstack_1grow (output, '\r');
2158 obstack_1grow (output, '\t');
2163 obstack_1grow (output, '\v');
2167 /* GCC extension. */
2170 obstack_1grow (output, HOST_ESCAPE_CHAR);
2174 /* Backslash-newline expands to nothing at all. */
2180 /* A few escapes just expand to the character itself. */
2184 /* GCC extensions. */
2189 /* Unrecognized escapes turn into the character itself. */
2192 obstack_1grow (output, *tokptr);
2200 /* Parse a string or character literal from TOKPTR. The string or
2201 character may be wide or unicode. *OUTPTR is set to just after the
2202 end of the literal in the input string. The resulting token is
2203 stored in VALUE. This returns a token value, either STRING or
2204 CHAR, depending on what was parsed. *HOST_CHARS is set to the
2205 number of host characters in the literal. */
2208 parse_string_or_char (const char *tokptr, const char **outptr,
2209 struct typed_stoken *value, int *host_chars)
2215 /* Build the gdb internal form of the input string in tempbuf. Note
2216 that the buffer is null byte terminated *only* for the
2217 convenience of debugging gdb itself and printing the buffer
2218 contents when the buffer contains no embedded nulls. Gdb does
2219 not depend upon the buffer being null byte terminated, it uses
2220 the length string instead. This allows gdb to handle C strings
2221 (as well as strings in other languages) with embedded null
2227 obstack_free (&tempbuf, NULL);
2228 obstack_init (&tempbuf);
2230 /* Record the string type. */
2233 type = C_WIDE_STRING;
2236 else if (*tokptr == 'u')
2241 else if (*tokptr == 'U')
2246 else if (*tokptr == '@')
2248 /* An Objective C string. */
2256 /* Skip the quote. */
2270 *host_chars += c_parse_escape (&tokptr, &tempbuf);
2272 else if (c == quote)
2276 obstack_1grow (&tempbuf, c);
2278 /* FIXME: this does the wrong thing with multi-byte host
2279 characters. We could use mbrlen here, but that would
2280 make "set host-charset" a bit less useful. */
2285 if (*tokptr != quote)
2288 error (_("Unterminated string in expression."));
2290 error (_("Unmatched single quote."));
2295 value->ptr = (char *) obstack_base (&tempbuf);
2296 value->length = obstack_object_size (&tempbuf);
2300 return quote == '"' ? (is_objc ? NSSTRING : STRING) : CHAR;
2303 /* This is used to associate some attributes with a token. */
2307 /* If this bit is set, the token is C++-only. */
2311 /* If this bit is set, the token is conditional: if there is a
2312 symbol of the same name, then the token is a symbol; otherwise,
2313 the token is a keyword. */
2317 DEF_ENUM_FLAGS_TYPE (enum token_flag, token_flags);
2323 enum exp_opcode opcode;
2327 static const struct token tokentab3[] =
2329 {">>=", ASSIGN_MODIFY, BINOP_RSH, 0},
2330 {"<<=", ASSIGN_MODIFY, BINOP_LSH, 0},
2331 {"->*", ARROW_STAR, BINOP_END, FLAG_CXX},
2332 {"...", DOTDOTDOT, BINOP_END, 0}
2335 static const struct token tokentab2[] =
2337 {"+=", ASSIGN_MODIFY, BINOP_ADD, 0},
2338 {"-=", ASSIGN_MODIFY, BINOP_SUB, 0},
2339 {"*=", ASSIGN_MODIFY, BINOP_MUL, 0},
2340 {"/=", ASSIGN_MODIFY, BINOP_DIV, 0},
2341 {"%=", ASSIGN_MODIFY, BINOP_REM, 0},
2342 {"|=", ASSIGN_MODIFY, BINOP_BITWISE_IOR, 0},
2343 {"&=", ASSIGN_MODIFY, BINOP_BITWISE_AND, 0},
2344 {"^=", ASSIGN_MODIFY, BINOP_BITWISE_XOR, 0},
2345 {"++", INCREMENT, BINOP_END, 0},
2346 {"--", DECREMENT, BINOP_END, 0},
2347 {"->", ARROW, BINOP_END, 0},
2348 {"&&", ANDAND, BINOP_END, 0},
2349 {"||", OROR, BINOP_END, 0},
2350 /* "::" is *not* only C++: gdb overrides its meaning in several
2351 different ways, e.g., 'filename'::func, function::variable. */
2352 {"::", COLONCOLON, BINOP_END, 0},
2353 {"<<", LSH, BINOP_END, 0},
2354 {">>", RSH, BINOP_END, 0},
2355 {"==", EQUAL, BINOP_END, 0},
2356 {"!=", NOTEQUAL, BINOP_END, 0},
2357 {"<=", LEQ, BINOP_END, 0},
2358 {">=", GEQ, BINOP_END, 0},
2359 {".*", DOT_STAR, BINOP_END, FLAG_CXX}
2362 /* Identifier-like tokens. Only type-specifiers than can appear in
2363 multi-word type names (for example 'double' can appear in 'long
2364 double') need to be listed here. type-specifiers that are only ever
2365 single word (like 'float') are handled by the classify_name function. */
2366 static const struct token ident_tokens[] =
2368 {"unsigned", UNSIGNED, OP_NULL, 0},
2369 {"template", TEMPLATE, OP_NULL, FLAG_CXX},
2370 {"volatile", VOLATILE_KEYWORD, OP_NULL, 0},
2371 {"struct", STRUCT, OP_NULL, 0},
2372 {"signed", SIGNED_KEYWORD, OP_NULL, 0},
2373 {"sizeof", SIZEOF, OP_NULL, 0},
2374 {"_Alignof", ALIGNOF, OP_NULL, 0},
2375 {"alignof", ALIGNOF, OP_NULL, FLAG_CXX},
2376 {"double", DOUBLE_KEYWORD, OP_NULL, 0},
2377 {"false", FALSEKEYWORD, OP_NULL, FLAG_CXX},
2378 {"class", CLASS, OP_NULL, FLAG_CXX},
2379 {"union", UNION, OP_NULL, 0},
2380 {"short", SHORT, OP_NULL, 0},
2381 {"const", CONST_KEYWORD, OP_NULL, 0},
2382 {"enum", ENUM, OP_NULL, 0},
2383 {"long", LONG, OP_NULL, 0},
2384 {"true", TRUEKEYWORD, OP_NULL, FLAG_CXX},
2385 {"int", INT_KEYWORD, OP_NULL, 0},
2386 {"new", NEW, OP_NULL, FLAG_CXX},
2387 {"delete", DELETE, OP_NULL, FLAG_CXX},
2388 {"operator", OPERATOR, OP_NULL, FLAG_CXX},
2390 {"and", ANDAND, BINOP_END, FLAG_CXX},
2391 {"and_eq", ASSIGN_MODIFY, BINOP_BITWISE_AND, FLAG_CXX},
2392 {"bitand", '&', OP_NULL, FLAG_CXX},
2393 {"bitor", '|', OP_NULL, FLAG_CXX},
2394 {"compl", '~', OP_NULL, FLAG_CXX},
2395 {"not", '!', OP_NULL, FLAG_CXX},
2396 {"not_eq", NOTEQUAL, BINOP_END, FLAG_CXX},
2397 {"or", OROR, BINOP_END, FLAG_CXX},
2398 {"or_eq", ASSIGN_MODIFY, BINOP_BITWISE_IOR, FLAG_CXX},
2399 {"xor", '^', OP_NULL, FLAG_CXX},
2400 {"xor_eq", ASSIGN_MODIFY, BINOP_BITWISE_XOR, FLAG_CXX},
2402 {"const_cast", CONST_CAST, OP_NULL, FLAG_CXX },
2403 {"dynamic_cast", DYNAMIC_CAST, OP_NULL, FLAG_CXX },
2404 {"static_cast", STATIC_CAST, OP_NULL, FLAG_CXX },
2405 {"reinterpret_cast", REINTERPRET_CAST, OP_NULL, FLAG_CXX },
2407 {"__typeof__", TYPEOF, OP_TYPEOF, 0 },
2408 {"__typeof", TYPEOF, OP_TYPEOF, 0 },
2409 {"typeof", TYPEOF, OP_TYPEOF, FLAG_SHADOW },
2410 {"__decltype", DECLTYPE, OP_DECLTYPE, FLAG_CXX },
2411 {"decltype", DECLTYPE, OP_DECLTYPE, FLAG_CXX | FLAG_SHADOW },
2413 {"typeid", TYPEID, OP_TYPEID, FLAG_CXX}
2416 /* When we find that lexptr (the global var defined in parse.c) is
2417 pointing at a macro invocation, we expand the invocation, and call
2418 scan_macro_expansion to save the old lexptr here and point lexptr
2419 into the expanded text. When we reach the end of that, we call
2420 end_macro_expansion to pop back to the value we saved here. The
2421 macro expansion code promises to return only fully-expanded text,
2422 so we don't need to "push" more than one level.
2424 This is disgusting, of course. It would be cleaner to do all macro
2425 expansion beforehand, and then hand that to lexptr. But we don't
2426 really know where the expression ends. Remember, in a command like
2428 (gdb) break *ADDRESS if CONDITION
2430 we evaluate ADDRESS in the scope of the current frame, but we
2431 evaluate CONDITION in the scope of the breakpoint's location. So
2432 it's simply wrong to try to macro-expand the whole thing at once. */
2433 static const char *macro_original_text;
2435 /* We save all intermediate macro expansions on this obstack for the
2436 duration of a single parse. The expansion text may sometimes have
2437 to live past the end of the expansion, due to yacc lookahead.
2438 Rather than try to be clever about saving the data for a single
2439 token, we simply keep it all and delete it after parsing has
2441 static struct obstack expansion_obstack;
2444 scan_macro_expansion (char *expansion)
2448 /* We'd better not be trying to push the stack twice. */
2449 gdb_assert (! macro_original_text);
2451 /* Copy to the obstack, and then free the intermediate
2453 copy = (char *) obstack_copy0 (&expansion_obstack, expansion,
2454 strlen (expansion));
2457 /* Save the old lexptr value, so we can return to it when we're done
2458 parsing the expanded text. */
2459 macro_original_text = lexptr;
2464 scanning_macro_expansion (void)
2466 return macro_original_text != 0;
2470 finished_macro_expansion (void)
2472 /* There'd better be something to pop back to. */
2473 gdb_assert (macro_original_text);
2475 /* Pop back to the original text. */
2476 lexptr = macro_original_text;
2477 macro_original_text = 0;
2481 scan_macro_cleanup (void *dummy)
2483 if (macro_original_text)
2484 finished_macro_expansion ();
2486 obstack_free (&expansion_obstack, NULL);
2489 /* Return true iff the token represents a C++ cast operator. */
2492 is_cast_operator (const char *token, int len)
2494 return (! strncmp (token, "dynamic_cast", len)
2495 || ! strncmp (token, "static_cast", len)
2496 || ! strncmp (token, "reinterpret_cast", len)
2497 || ! strncmp (token, "const_cast", len));
2500 /* The scope used for macro expansion. */
2501 static struct macro_scope *expression_macro_scope;
2503 /* This is set if a NAME token appeared at the very end of the input
2504 string, with no whitespace separating the name from the EOF. This
2505 is used only when parsing to do field name completion. */
2506 static int saw_name_at_eof;
2508 /* This is set if the previously-returned token was a structure
2509 operator -- either '.' or ARROW. */
2510 static bool last_was_structop;
2512 /* Read one token, getting characters through lexptr. */
2515 lex_one_token (struct parser_state *par_state, bool *is_quoted_name)
2520 const char *tokstart;
2521 bool saw_structop = last_was_structop;
2524 last_was_structop = false;
2525 *is_quoted_name = false;
2529 /* Check if this is a macro invocation that we need to expand. */
2530 if (! scanning_macro_expansion ())
2532 char *expanded = macro_expand_next (&lexptr,
2533 standard_macro_lookup,
2534 expression_macro_scope);
2537 scan_macro_expansion (expanded);
2540 prev_lexptr = lexptr;
2543 /* See if it is a special token of length 3. */
2544 for (i = 0; i < sizeof tokentab3 / sizeof tokentab3[0]; i++)
2545 if (strncmp (tokstart, tokentab3[i].oper, 3) == 0)
2547 if ((tokentab3[i].flags & FLAG_CXX) != 0
2548 && parse_language (par_state)->la_language != language_cplus)
2552 yylval.opcode = tokentab3[i].opcode;
2553 return tokentab3[i].token;
2556 /* See if it is a special token of length 2. */
2557 for (i = 0; i < sizeof tokentab2 / sizeof tokentab2[0]; i++)
2558 if (strncmp (tokstart, tokentab2[i].oper, 2) == 0)
2560 if ((tokentab2[i].flags & FLAG_CXX) != 0
2561 && parse_language (par_state)->la_language != language_cplus)
2565 yylval.opcode = tokentab2[i].opcode;
2566 if (tokentab2[i].token == ARROW)
2567 last_was_structop = 1;
2568 return tokentab2[i].token;
2571 switch (c = *tokstart)
2574 /* If we were just scanning the result of a macro expansion,
2575 then we need to resume scanning the original text.
2576 If we're parsing for field name completion, and the previous
2577 token allows such completion, return a COMPLETE token.
2578 Otherwise, we were already scanning the original text, and
2579 we're really done. */
2580 if (scanning_macro_expansion ())
2582 finished_macro_expansion ();
2585 else if (saw_name_at_eof)
2587 saw_name_at_eof = 0;
2590 else if (parse_completion && saw_structop)
2605 if (parse_language (par_state)->la_language == language_objc
2612 if (paren_depth == 0)
2619 if (comma_terminates
2621 && ! scanning_macro_expansion ())
2627 /* Might be a floating point number. */
2628 if (lexptr[1] < '0' || lexptr[1] > '9')
2630 last_was_structop = true;
2631 goto symbol; /* Nope, must be a symbol. */
2646 /* It's a number. */
2647 int got_dot = 0, got_e = 0, toktype;
2648 const char *p = tokstart;
2649 int hex = input_radix > 10;
2651 if (c == '0' && (p[1] == 'x' || p[1] == 'X'))
2656 else if (c == '0' && (p[1]=='t' || p[1]=='T' || p[1]=='d' || p[1]=='D'))
2664 /* This test includes !hex because 'e' is a valid hex digit
2665 and thus does not indicate a floating point number when
2666 the radix is hex. */
2667 if (!hex && !got_e && (*p == 'e' || *p == 'E'))
2668 got_dot = got_e = 1;
2669 /* This test does not include !hex, because a '.' always indicates
2670 a decimal floating point number regardless of the radix. */
2671 else if (!got_dot && *p == '.')
2673 else if (got_e && (p[-1] == 'e' || p[-1] == 'E')
2674 && (*p == '-' || *p == '+'))
2675 /* This is the sign of the exponent, not the end of the
2678 /* We will take any letters or digits. parse_number will
2679 complain if past the radix, or if L or U are not final. */
2680 else if ((*p < '0' || *p > '9')
2681 && ((*p < 'a' || *p > 'z')
2682 && (*p < 'A' || *p > 'Z')))
2685 toktype = parse_number (par_state, tokstart, p - tokstart,
2686 got_dot|got_e, &yylval);
2687 if (toktype == ERROR)
2689 char *err_copy = (char *) alloca (p - tokstart + 1);
2691 memcpy (err_copy, tokstart, p - tokstart);
2692 err_copy[p - tokstart] = 0;
2693 error (_("Invalid number \"%s\"."), err_copy);
2701 const char *p = &tokstart[1];
2703 if (parse_language (par_state)->la_language == language_objc)
2705 size_t len = strlen ("selector");
2707 if (strncmp (p, "selector", len) == 0
2708 && (p[len] == '\0' || ISSPACE (p[len])))
2717 while (ISSPACE (*p))
2719 size_t len = strlen ("entry");
2720 if (strncmp (p, "entry", len) == 0 && !c_ident_is_alnum (p[len])
2752 if (tokstart[1] != '"' && tokstart[1] != '\'')
2761 int result = parse_string_or_char (tokstart, &lexptr, &yylval.tsval,
2766 error (_("Empty character constant."));
2767 else if (host_len > 2 && c == '\'')
2770 namelen = lexptr - tokstart - 1;
2771 *is_quoted_name = true;
2775 else if (host_len > 1)
2776 error (_("Invalid character constant."));
2782 if (!(c == '_' || c == '$' || c_ident_is_alpha (c)))
2783 /* We must have come across a bad character (e.g. ';'). */
2784 error (_("Invalid character '%c' in expression."), c);
2786 /* It's a name. See how long it is. */
2788 for (c = tokstart[namelen];
2789 (c == '_' || c == '$' || c_ident_is_alnum (c) || c == '<');)
2791 /* Template parameter lists are part of the name.
2792 FIXME: This mishandles `print $a<4&&$a>3'. */
2796 if (! is_cast_operator (tokstart, namelen))
2798 /* Scan ahead to get rest of the template specification. Note
2799 that we look ahead only when the '<' adjoins non-whitespace
2800 characters; for comparison expressions, e.g. "a < b > c",
2801 there must be spaces before the '<', etc. */
2802 const char *p = find_template_name_end (tokstart + namelen);
2805 namelen = p - tokstart;
2809 c = tokstart[++namelen];
2812 /* The token "if" terminates the expression and is NOT removed from
2813 the input stream. It doesn't count if it appears in the
2814 expansion of a macro. */
2816 && tokstart[0] == 'i'
2817 && tokstart[1] == 'f'
2818 && ! scanning_macro_expansion ())
2823 /* For the same reason (breakpoint conditions), "thread N"
2824 terminates the expression. "thread" could be an identifier, but
2825 an identifier is never followed by a number without intervening
2826 punctuation. "task" is similar. Handle abbreviations of these,
2827 similarly to breakpoint.c:find_condition_and_thread. */
2829 && (strncmp (tokstart, "thread", namelen) == 0
2830 || strncmp (tokstart, "task", namelen) == 0)
2831 && (tokstart[namelen] == ' ' || tokstart[namelen] == '\t')
2832 && ! scanning_macro_expansion ())
2834 const char *p = tokstart + namelen + 1;
2836 while (*p == ' ' || *p == '\t')
2838 if (*p >= '0' && *p <= '9')
2846 yylval.sval.ptr = tokstart;
2847 yylval.sval.length = namelen;
2849 /* Catch specific keywords. */
2850 copy = copy_name (yylval.sval);
2851 for (i = 0; i < sizeof ident_tokens / sizeof ident_tokens[0]; i++)
2852 if (strcmp (copy, ident_tokens[i].oper) == 0)
2854 if ((ident_tokens[i].flags & FLAG_CXX) != 0
2855 && parse_language (par_state)->la_language != language_cplus)
2858 if ((ident_tokens[i].flags & FLAG_SHADOW) != 0)
2860 struct field_of_this_result is_a_field_of_this;
2862 if (lookup_symbol (copy, expression_context_block,
2864 (parse_language (par_state)->la_language
2865 == language_cplus ? &is_a_field_of_this
2869 /* The keyword is shadowed. */
2874 /* It is ok to always set this, even though we don't always
2875 strictly need to. */
2876 yylval.opcode = ident_tokens[i].opcode;
2877 return ident_tokens[i].token;
2880 if (*tokstart == '$')
2883 if (parse_completion && *lexptr == '\0')
2884 saw_name_at_eof = 1;
2886 yylval.ssym.stoken = yylval.sval;
2887 yylval.ssym.sym.symbol = NULL;
2888 yylval.ssym.sym.block = NULL;
2889 yylval.ssym.is_a_field_of_this = 0;
2893 /* An object of this type is pushed on a FIFO by the "outer" lexer. */
2894 struct token_and_value
2900 /* A FIFO of tokens that have been read but not yet returned to the
2902 static std::vector<token_and_value> token_fifo;
2904 /* Non-zero if the lexer should return tokens from the FIFO. */
2907 /* Temporary storage for c_lex; this holds symbol names as they are
2909 auto_obstack name_obstack;
2911 /* Classify a NAME token. The contents of the token are in `yylval'.
2912 Updates yylval and returns the new token type. BLOCK is the block
2913 in which lookups start; this can be NULL to mean the global scope.
2914 IS_QUOTED_NAME is non-zero if the name token was originally quoted
2915 in single quotes. IS_AFTER_STRUCTOP is true if this name follows
2916 a structure operator -- either '.' or ARROW */
2919 classify_name (struct parser_state *par_state, const struct block *block,
2920 bool is_quoted_name, bool is_after_structop)
2922 struct block_symbol bsym;
2924 struct field_of_this_result is_a_field_of_this;
2926 copy = copy_name (yylval.sval);
2928 /* Initialize this in case we *don't* use it in this call; that way
2929 we can refer to it unconditionally below. */
2930 memset (&is_a_field_of_this, 0, sizeof (is_a_field_of_this));
2932 bsym = lookup_symbol (copy, block, VAR_DOMAIN,
2933 parse_language (par_state)->la_name_of_this
2934 ? &is_a_field_of_this : NULL);
2936 if (bsym.symbol && SYMBOL_CLASS (bsym.symbol) == LOC_BLOCK)
2938 yylval.ssym.sym = bsym;
2939 yylval.ssym.is_a_field_of_this = is_a_field_of_this.type != NULL;
2942 else if (!bsym.symbol)
2944 /* If we found a field of 'this', we might have erroneously
2945 found a constructor where we wanted a type name. Handle this
2946 case by noticing that we found a constructor and then look up
2947 the type tag instead. */
2948 if (is_a_field_of_this.type != NULL
2949 && is_a_field_of_this.fn_field != NULL
2950 && TYPE_FN_FIELD_CONSTRUCTOR (is_a_field_of_this.fn_field->fn_fields,
2953 struct field_of_this_result inner_is_a_field_of_this;
2955 bsym = lookup_symbol (copy, block, STRUCT_DOMAIN,
2956 &inner_is_a_field_of_this);
2957 if (bsym.symbol != NULL)
2959 yylval.tsym.type = SYMBOL_TYPE (bsym.symbol);
2964 /* If we found a field on the "this" object, or we are looking
2965 up a field on a struct, then we want to prefer it over a
2966 filename. However, if the name was quoted, then it is better
2967 to check for a filename or a block, since this is the only
2968 way the user has of requiring the extension to be used. */
2969 if ((is_a_field_of_this.type == NULL && !is_after_structop)
2972 /* See if it's a file name. */
2973 struct symtab *symtab;
2975 symtab = lookup_symtab (copy);
2978 yylval.bval = BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (symtab),
2985 if (bsym.symbol && SYMBOL_CLASS (bsym.symbol) == LOC_TYPEDEF)
2987 yylval.tsym.type = SYMBOL_TYPE (bsym.symbol);
2991 /* See if it's an ObjC classname. */
2992 if (parse_language (par_state)->la_language == language_objc && !bsym.symbol)
2994 CORE_ADDR Class = lookup_objc_class (parse_gdbarch (par_state), copy);
2999 yylval.theclass.theclass = Class;
3000 sym = lookup_struct_typedef (copy, expression_context_block, 1);
3002 yylval.theclass.type = SYMBOL_TYPE (sym);
3007 /* Input names that aren't symbols but ARE valid hex numbers, when
3008 the input radix permits them, can be names or numbers depending
3009 on the parse. Note we support radixes > 16 here. */
3011 && ((copy[0] >= 'a' && copy[0] < 'a' + input_radix - 10)
3012 || (copy[0] >= 'A' && copy[0] < 'A' + input_radix - 10)))
3014 YYSTYPE newlval; /* Its value is ignored. */
3015 int hextype = parse_number (par_state, copy, yylval.sval.length,
3020 yylval.ssym.sym = bsym;
3021 yylval.ssym.is_a_field_of_this = is_a_field_of_this.type != NULL;
3026 /* Any other kind of symbol */
3027 yylval.ssym.sym = bsym;
3028 yylval.ssym.is_a_field_of_this = is_a_field_of_this.type != NULL;
3030 if (bsym.symbol == NULL
3031 && parse_language (par_state)->la_language == language_cplus
3032 && is_a_field_of_this.type == NULL
3033 && lookup_minimal_symbol (copy, NULL, NULL).minsym == NULL)
3034 return UNKNOWN_CPP_NAME;
3039 /* Like classify_name, but used by the inner loop of the lexer, when a
3040 name might have already been seen. CONTEXT is the context type, or
3041 NULL if this is the first component of a name. */
3044 classify_inner_name (struct parser_state *par_state,
3045 const struct block *block, struct type *context)
3050 if (context == NULL)
3051 return classify_name (par_state, block, false, false);
3053 type = check_typedef (context);
3054 if (!type_aggregate_p (type))
3057 copy = copy_name (yylval.ssym.stoken);
3058 /* N.B. We assume the symbol can only be in VAR_DOMAIN. */
3059 yylval.ssym.sym = cp_lookup_nested_symbol (type, copy, block, VAR_DOMAIN);
3061 /* If no symbol was found, search for a matching base class named
3062 COPY. This will allow users to enter qualified names of class members
3063 relative to the `this' pointer. */
3064 if (yylval.ssym.sym.symbol == NULL)
3066 struct type *base_type = cp_find_type_baseclass_by_name (type, copy);
3068 if (base_type != NULL)
3070 yylval.tsym.type = base_type;
3077 switch (SYMBOL_CLASS (yylval.ssym.sym.symbol))
3081 /* cp_lookup_nested_symbol might have accidentally found a constructor
3082 named COPY when we really wanted a base class of the same name.
3083 Double-check this case by looking for a base class. */
3085 struct type *base_type = cp_find_type_baseclass_by_name (type, copy);
3087 if (base_type != NULL)
3089 yylval.tsym.type = base_type;
3096 yylval.tsym.type = SYMBOL_TYPE (yylval.ssym.sym.symbol);
3102 internal_error (__FILE__, __LINE__, _("not reached"));
3105 /* The outer level of a two-level lexer. This calls the inner lexer
3106 to return tokens. It then either returns these tokens, or
3107 aggregates them into a larger token. This lets us work around a
3108 problem in our parsing approach, where the parser could not
3109 distinguish between qualified names and qualified types at the
3112 This approach is still not ideal, because it mishandles template
3113 types. See the comment in lex_one_token for an example. However,
3114 this is still an improvement over the earlier approach, and will
3115 suffice until we move to better parsing technology. */
3120 token_and_value current;
3121 int first_was_coloncolon, last_was_coloncolon;
3122 struct type *context_type = NULL;
3123 int last_to_examine, next_to_examine, checkpoint;
3124 const struct block *search_block;
3125 bool is_quoted_name, last_lex_was_structop;
3127 if (popping && !token_fifo.empty ())
3131 last_lex_was_structop = last_was_structop;
3133 /* Read the first token and decide what to do. Most of the
3134 subsequent code is C++-only; but also depends on seeing a "::" or
3136 current.token = lex_one_token (pstate, &is_quoted_name);
3137 if (current.token == NAME)
3138 current.token = classify_name (pstate, expression_context_block,
3139 is_quoted_name, last_lex_was_structop);
3140 if (parse_language (pstate)->la_language != language_cplus
3141 || (current.token != TYPENAME && current.token != COLONCOLON
3142 && current.token != FILENAME))
3143 return current.token;
3145 /* Read any sequence of alternating "::" and name-like tokens into
3147 current.value = yylval;
3148 token_fifo.push_back (current);
3149 last_was_coloncolon = current.token == COLONCOLON;
3154 /* We ignore quoted names other than the very first one.
3155 Subsequent ones do not have any special meaning. */
3156 current.token = lex_one_token (pstate, &ignore);
3157 current.value = yylval;
3158 token_fifo.push_back (current);
3160 if ((last_was_coloncolon && current.token != NAME)
3161 || (!last_was_coloncolon && current.token != COLONCOLON))
3163 last_was_coloncolon = !last_was_coloncolon;
3167 /* We always read one extra token, so compute the number of tokens
3168 to examine accordingly. */
3169 last_to_examine = token_fifo.size () - 2;
3170 next_to_examine = 0;
3172 current = token_fifo[next_to_examine];
3175 name_obstack.clear ();
3177 if (current.token == FILENAME)
3178 search_block = current.value.bval;
3179 else if (current.token == COLONCOLON)
3180 search_block = NULL;
3183 gdb_assert (current.token == TYPENAME);
3184 search_block = expression_context_block;
3185 obstack_grow (&name_obstack, current.value.sval.ptr,
3186 current.value.sval.length);
3187 context_type = current.value.tsym.type;
3191 first_was_coloncolon = current.token == COLONCOLON;
3192 last_was_coloncolon = first_was_coloncolon;
3194 while (next_to_examine <= last_to_examine)
3196 token_and_value next;
3198 next = token_fifo[next_to_examine];
3201 if (next.token == NAME && last_was_coloncolon)
3205 yylval = next.value;
3206 classification = classify_inner_name (pstate, search_block,
3208 /* We keep going until we either run out of names, or until
3209 we have a qualified name which is not a type. */
3210 if (classification != TYPENAME && classification != NAME)
3213 /* Accept up to this token. */
3214 checkpoint = next_to_examine;
3216 /* Update the partial name we are constructing. */
3217 if (context_type != NULL)
3219 /* We don't want to put a leading "::" into the name. */
3220 obstack_grow_str (&name_obstack, "::");
3222 obstack_grow (&name_obstack, next.value.sval.ptr,
3223 next.value.sval.length);
3225 yylval.sval.ptr = (const char *) obstack_base (&name_obstack);
3226 yylval.sval.length = obstack_object_size (&name_obstack);
3227 current.value = yylval;
3228 current.token = classification;
3230 last_was_coloncolon = 0;
3232 if (classification == NAME)
3235 context_type = yylval.tsym.type;
3237 else if (next.token == COLONCOLON && !last_was_coloncolon)
3238 last_was_coloncolon = 1;
3241 /* We've reached the end of the name. */
3246 /* If we have a replacement token, install it as the first token in
3247 the FIFO, and delete the other constituent tokens. */
3250 current.value.sval.ptr
3251 = (const char *) obstack_copy0 (&expansion_obstack,
3252 current.value.sval.ptr,
3253 current.value.sval.length);
3255 token_fifo[0] = current;
3257 token_fifo.erase (token_fifo.begin () + 1,
3258 token_fifo.begin () + checkpoint);
3262 current = token_fifo[0];
3263 token_fifo.erase (token_fifo.begin ());
3264 yylval = current.value;
3265 return current.token;
3269 c_parse (struct parser_state *par_state)
3272 struct cleanup *back_to;
3274 /* Setting up the parser state. */
3275 scoped_restore pstate_restore = make_scoped_restore (&pstate);
3276 gdb_assert (par_state != NULL);
3279 gdb::unique_xmalloc_ptr<struct macro_scope> macro_scope;
3281 if (expression_context_block)
3282 macro_scope = sal_macro_scope (find_pc_line (expression_context_pc, 0));
3284 macro_scope = default_macro_scope ();
3286 macro_scope = user_macro_scope ();
3288 scoped_restore restore_macro_scope
3289 = make_scoped_restore (&expression_macro_scope, macro_scope.get ());
3291 /* Initialize macro expansion code. */
3292 obstack_init (&expansion_obstack);
3293 gdb_assert (! macro_original_text);
3294 /* Note that parsing (within yyparse) freely installs cleanups
3295 assuming they'll be run here (below). */
3296 back_to = make_cleanup (scan_macro_cleanup, 0);
3298 scoped_restore restore_yydebug = make_scoped_restore (&yydebug,
3301 /* Initialize some state used by the lexer. */
3302 last_was_structop = false;
3303 saw_name_at_eof = 0;
3305 token_fifo.clear ();
3307 name_obstack.clear ();
3309 result = yyparse ();
3310 do_cleanups (back_to);
3317 /* This is called via the YYPRINT macro when parser debugging is
3318 enabled. It prints a token's value. */
3321 c_print_token (FILE *file, int type, YYSTYPE value)
3326 parser_fprintf (file, "typed_val_int<%s, %s>",
3327 TYPE_SAFE_NAME (value.typed_val_int.type),
3328 pulongest (value.typed_val_int.val));
3334 char *copy = (char *) alloca (value.tsval.length + 1);
3336 memcpy (copy, value.tsval.ptr, value.tsval.length);
3337 copy[value.tsval.length] = '\0';
3339 parser_fprintf (file, "tsval<type=%d, %s>", value.tsval.type, copy);
3345 parser_fprintf (file, "sval<%s>", copy_name (value.sval));
3349 parser_fprintf (file, "tsym<type=%s, name=%s>",
3350 TYPE_SAFE_NAME (value.tsym.type),
3351 copy_name (value.tsym.stoken));
3355 case UNKNOWN_CPP_NAME:
3358 parser_fprintf (file, "ssym<name=%s, sym=%s, field_of_this=%d>",
3359 copy_name (value.ssym.stoken),
3360 (value.ssym.sym.symbol == NULL
3361 ? "(null)" : SYMBOL_PRINT_NAME (value.ssym.sym.symbol)),
3362 value.ssym.is_a_field_of_this);
3366 parser_fprintf (file, "bval<%s>", host_address_to_string (value.bval));
3374 yyerror (const char *msg)
3377 lexptr = prev_lexptr;
3379 error (_("A %s in expression, near `%s'."), msg, lexptr);