1 /* YACC parser for C expressions, for GDB.
3 Copyright 1986, 1989, 1990, 1991, 1993, 1994, 2002 Free Software
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 2 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, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 /* Parse a C expression from text in a string, and return the result
22 as a struct expression pointer. That structure contains arithmetic
23 operations in reverse polish, with constants represented by
24 operations that are followed by special data. See expression.h for
25 the details of the format. What is important here is that it can
26 be built up sequentially during the process of parsing; the lower
27 levels of the tree always come first in the result.
29 Note that malloc's and realloc's in this file are transformed to
30 xmalloc and xrealloc respectively by the same sed command in the
31 makefile that remaps any other malloc/realloc inserted by the
32 parser generator. Doing this with #defines and trying to control
33 the interaction with include files (<malloc.h> and <stdlib.h> for
34 example) just became too messy, particularly when such includes can
35 be inserted at random times by the parser generator. */
40 #include "gdb_string.h"
42 #include "expression.h"
44 #include "objc-lang.h" /* For objc language constructs. */
47 #include "parser-defs.h"
50 #include "bfd.h" /* Required by objfiles.h. */
51 #include "symfile.h" /* Required by objfiles.h. */
52 #include "objfiles.h" /* For have_full_symbols and have_partial_symbols. */
54 #include "completer.h" /* For skip_quoted(). */
57 /* Remap normal yacc parser interface names (yyparse, yylex, yyerror,
58 etc), as well as gratuitiously global symbol names, so we can have
59 multiple yacc generated parsers in gdb. Note that these are only
60 the variables produced by yacc. If other parser generators (bison,
61 byacc, etc) produce additional global names that conflict at link
62 time, then those parser generators need to be fixed instead of
63 adding those names to this list. */
65 #define yymaxdepth objc_maxdepth
66 #define yyparse objc_parse
67 #define yylex objc_lex
68 #define yyerror objc_error
69 #define yylval objc_lval
70 #define yychar objc_char
71 #define yydebug objc_debug
72 #define yypact objc_pact
75 #define yydef objc_def
76 #define yychk objc_chk
77 #define yypgo objc_pgo
78 #define yyact objc_act
79 #define yyexca objc_exca
80 #define yyerrflag objc_errflag
81 #define yynerrs objc_nerrs
85 #define yy_yys objc_yys
86 #define yystate objc_state
87 #define yytmp objc_tmp
89 #define yy_yyv objc_yyv
90 #define yyval objc_val
91 #define yylloc objc_lloc
92 #define yyreds objc_reds /* With YYDEBUG defined */
93 #define yytoks objc_toks /* With YYDEBUG defined */
94 #define yyname objc_name /* With YYDEBUG defined */
95 #define yyrule objc_rule /* With YYDEBUG defined */
96 #define yylhs objc_yylhs
97 #define yylen objc_yylen
98 #define yydefred objc_yydefred
99 #define yydgoto objc_yydgoto
100 #define yysindex objc_yysindex
101 #define yyrindex objc_yyrindex
102 #define yygindex objc_yygindex
103 #define yytable objc_yytable
104 #define yycheck objc_yycheck
107 #define YYDEBUG 0 /* Default to no yydebug support. */
111 yyparse PARAMS ((void));
114 yylex PARAMS ((void));
117 yyerror PARAMS ((char *));
121 /* Although the yacc "value" of an expression is not used,
122 since the result is stored in the structure being created,
123 other node types do have values. */
140 struct symtoken ssym;
143 enum exp_opcode opcode;
144 struct internalvar *ivar;
145 struct objc_class_str class;
152 /* YYSTYPE gets defined by %union. */
154 parse_number PARAMS ((char *, int, int, YYSTYPE *));
157 %type <voidval> exp exp1 type_exp start variable qualified_name lcurly
159 %type <tval> type typebase
160 %type <tvec> nonempty_typelist
161 /* %type <bval> block */
163 /* Fancy type parsing. */
164 %type <voidval> func_mod direct_abs_decl abs_decl
166 %type <lval> array_mod
168 %token <typed_val_int> INT
169 %token <typed_val_float> FLOAT
171 /* Both NAME and TYPENAME tokens represent symbols in the input, and
172 both convey their data as strings. But a TYPENAME is a string that
173 happens to be defined as a typedef or builtin type name (such as
174 int or char) and a NAME is any other symbol. Contexts where this
175 distinction is not important can use the nonterminal "name", which
176 matches either NAME or TYPENAME. */
179 %token <sval> NSSTRING /* ObjC Foundation "NSString" literal */
180 %token <sval> SELECTOR /* ObjC "@selector" pseudo-operator */
181 %token <ssym> NAME /* BLOCKNAME defined below to give it higher precedence. */
182 %token <tsym> TYPENAME
183 %token <class> CLASSNAME /* ObjC Class name */
185 %type <ssym> name_not_typename
186 %type <tsym> typename
188 /* A NAME_OR_INT is a symbol which is not known in the symbol table,
189 but which would parse as a valid number in the current input radix.
190 E.g. "c" when input_radix==16. Depending on the parse, it will be
191 turned into a name or into a number. */
193 %token <ssym> NAME_OR_INT
195 %token STRUCT CLASS UNION ENUM SIZEOF UNSIGNED COLONCOLON
199 /* Special type cases, put in to allow the parser to distinguish
200 different legal basetypes. */
201 %token SIGNED_KEYWORD LONG SHORT INT_KEYWORD CONST_KEYWORD VOLATILE_KEYWORD DOUBLE_KEYWORD
203 %token <voidval> VARIABLE
205 %token <opcode> ASSIGN_MODIFY
209 %right '=' ASSIGN_MODIFY
217 %left '<' '>' LEQ GEQ
222 %right UNARY INCREMENT DECREMENT
223 %right ARROW '.' '[' '('
224 %token <ssym> BLOCKNAME
236 { write_exp_elt_opcode(OP_TYPE);
237 write_exp_elt_type($1);
238 write_exp_elt_opcode(OP_TYPE);}
241 /* Expressions, including the comma operator. */
244 { write_exp_elt_opcode (BINOP_COMMA); }
247 /* Expressions, not including the comma operator. */
248 exp : '*' exp %prec UNARY
249 { write_exp_elt_opcode (UNOP_IND); }
252 exp : '&' exp %prec UNARY
253 { write_exp_elt_opcode (UNOP_ADDR); }
256 exp : '-' exp %prec UNARY
257 { write_exp_elt_opcode (UNOP_NEG); }
260 exp : '!' exp %prec UNARY
261 { write_exp_elt_opcode (UNOP_LOGICAL_NOT); }
264 exp : '~' exp %prec UNARY
265 { write_exp_elt_opcode (UNOP_COMPLEMENT); }
268 exp : INCREMENT exp %prec UNARY
269 { write_exp_elt_opcode (UNOP_PREINCREMENT); }
272 exp : DECREMENT exp %prec UNARY
273 { write_exp_elt_opcode (UNOP_PREDECREMENT); }
276 exp : exp INCREMENT %prec UNARY
277 { write_exp_elt_opcode (UNOP_POSTINCREMENT); }
280 exp : exp DECREMENT %prec UNARY
281 { write_exp_elt_opcode (UNOP_POSTDECREMENT); }
284 exp : SIZEOF exp %prec UNARY
285 { write_exp_elt_opcode (UNOP_SIZEOF); }
289 { write_exp_elt_opcode (STRUCTOP_PTR);
290 write_exp_string ($3);
291 write_exp_elt_opcode (STRUCTOP_PTR); }
294 exp : exp ARROW qualified_name
295 { /* exp->type::name becomes exp->*(&type::name) */
296 /* Note: this doesn't work if name is a
297 static member! FIXME */
298 write_exp_elt_opcode (UNOP_ADDR);
299 write_exp_elt_opcode (STRUCTOP_MPTR); }
301 exp : exp ARROW '*' exp
302 { write_exp_elt_opcode (STRUCTOP_MPTR); }
306 { write_exp_elt_opcode (STRUCTOP_STRUCT);
307 write_exp_string ($3);
308 write_exp_elt_opcode (STRUCTOP_STRUCT); }
312 exp : exp '.' qualified_name
313 { /* exp.type::name becomes exp.*(&type::name) */
314 /* Note: this doesn't work if name is a
315 static member! FIXME */
316 write_exp_elt_opcode (UNOP_ADDR);
317 write_exp_elt_opcode (STRUCTOP_MEMBER); }
320 exp : exp '.' '*' exp
321 { write_exp_elt_opcode (STRUCTOP_MEMBER); }
324 exp : exp '[' exp1 ']'
325 { write_exp_elt_opcode (BINOP_SUBSCRIPT); }
328 * The rules below parse ObjC message calls of the form:
329 * '[' target selector {':' argument}* ']'
336 class = lookup_objc_class (copy_name ($2.stoken));
338 error ("%s is not an ObjC Class",
339 copy_name ($2.stoken));
340 write_exp_elt_opcode (OP_LONG);
341 write_exp_elt_type (builtin_type_int);
342 write_exp_elt_longcst ((LONGEST) class);
343 write_exp_elt_opcode (OP_LONG);
347 { write_exp_elt_opcode (OP_OBJC_MSGCALL);
349 write_exp_elt_opcode (OP_OBJC_MSGCALL);
355 write_exp_elt_opcode (OP_LONG);
356 write_exp_elt_type (builtin_type_int);
357 write_exp_elt_longcst ((LONGEST) $2.class);
358 write_exp_elt_opcode (OP_LONG);
362 { write_exp_elt_opcode (OP_OBJC_MSGCALL);
364 write_exp_elt_opcode (OP_OBJC_MSGCALL);
371 { write_exp_elt_opcode (OP_OBJC_MSGCALL);
373 write_exp_elt_opcode (OP_OBJC_MSGCALL);
378 { add_msglist(&$1, 0); }
386 msgarg : name ':' exp
387 { add_msglist(&$1, 1); }
388 | ':' exp /* Unnamed arg. */
389 { add_msglist(0, 1); }
390 | ',' exp /* Variable number of args. */
391 { add_msglist(0, 0); }
395 /* This is to save the value of arglist_len
396 being accumulated by an outer function call. */
397 { start_arglist (); }
398 arglist ')' %prec ARROW
399 { write_exp_elt_opcode (OP_FUNCALL);
400 write_exp_elt_longcst ((LONGEST) end_arglist ());
401 write_exp_elt_opcode (OP_FUNCALL); }
405 { start_arglist (); }
415 arglist : arglist ',' exp %prec ABOVE_COMMA
420 { $$ = end_arglist () - 1; }
422 exp : lcurly arglist rcurly %prec ARROW
423 { write_exp_elt_opcode (OP_ARRAY);
424 write_exp_elt_longcst ((LONGEST) 0);
425 write_exp_elt_longcst ((LONGEST) $3);
426 write_exp_elt_opcode (OP_ARRAY); }
429 exp : lcurly type rcurly exp %prec UNARY
430 { write_exp_elt_opcode (UNOP_MEMVAL);
431 write_exp_elt_type ($2);
432 write_exp_elt_opcode (UNOP_MEMVAL); }
435 exp : '(' type ')' exp %prec UNARY
436 { write_exp_elt_opcode (UNOP_CAST);
437 write_exp_elt_type ($2);
438 write_exp_elt_opcode (UNOP_CAST); }
445 /* Binary operators in order of decreasing precedence. */
448 { write_exp_elt_opcode (BINOP_REPEAT); }
452 { write_exp_elt_opcode (BINOP_MUL); }
456 { write_exp_elt_opcode (BINOP_DIV); }
460 { write_exp_elt_opcode (BINOP_REM); }
464 { write_exp_elt_opcode (BINOP_ADD); }
468 { write_exp_elt_opcode (BINOP_SUB); }
472 { write_exp_elt_opcode (BINOP_LSH); }
476 { write_exp_elt_opcode (BINOP_RSH); }
480 { write_exp_elt_opcode (BINOP_EQUAL); }
483 exp : exp NOTEQUAL exp
484 { write_exp_elt_opcode (BINOP_NOTEQUAL); }
488 { write_exp_elt_opcode (BINOP_LEQ); }
492 { write_exp_elt_opcode (BINOP_GEQ); }
496 { write_exp_elt_opcode (BINOP_LESS); }
500 { write_exp_elt_opcode (BINOP_GTR); }
504 { write_exp_elt_opcode (BINOP_BITWISE_AND); }
508 { write_exp_elt_opcode (BINOP_BITWISE_XOR); }
512 { write_exp_elt_opcode (BINOP_BITWISE_IOR); }
516 { write_exp_elt_opcode (BINOP_LOGICAL_AND); }
520 { write_exp_elt_opcode (BINOP_LOGICAL_OR); }
523 exp : exp '?' exp ':' exp %prec '?'
524 { write_exp_elt_opcode (TERNOP_COND); }
528 { write_exp_elt_opcode (BINOP_ASSIGN); }
531 exp : exp ASSIGN_MODIFY exp
532 { write_exp_elt_opcode (BINOP_ASSIGN_MODIFY);
533 write_exp_elt_opcode ($2);
534 write_exp_elt_opcode (BINOP_ASSIGN_MODIFY); }
538 { write_exp_elt_opcode (OP_LONG);
539 write_exp_elt_type ($1.type);
540 write_exp_elt_longcst ((LONGEST)($1.val));
541 write_exp_elt_opcode (OP_LONG); }
546 parse_number ($1.stoken.ptr, $1.stoken.length, 0, &val);
547 write_exp_elt_opcode (OP_LONG);
548 write_exp_elt_type (val.typed_val_int.type);
549 write_exp_elt_longcst ((LONGEST)val.typed_val_int.val);
550 write_exp_elt_opcode (OP_LONG);
556 { write_exp_elt_opcode (OP_DOUBLE);
557 write_exp_elt_type ($1.type);
558 write_exp_elt_dblcst ($1.dval);
559 write_exp_elt_opcode (OP_DOUBLE); }
566 /* Already written by write_dollar_variable. */
571 write_exp_elt_opcode (OP_OBJC_SELECTOR);
572 write_exp_string ($1);
573 write_exp_elt_opcode (OP_OBJC_SELECTOR); }
576 exp : SIZEOF '(' type ')' %prec UNARY
577 { write_exp_elt_opcode (OP_LONG);
578 write_exp_elt_type (builtin_type_int);
580 write_exp_elt_longcst ((LONGEST) TYPE_LENGTH ($3));
581 write_exp_elt_opcode (OP_LONG); }
585 { /* C strings are converted into array
586 constants with an explicit null byte
587 added at the end. Thus the array upper
588 bound is the string length. There is no
589 such thing in C as a completely empty
591 char *sp = $1.ptr; int count = $1.length;
594 write_exp_elt_opcode (OP_LONG);
595 write_exp_elt_type (builtin_type_char);
596 write_exp_elt_longcst ((LONGEST)(*sp++));
597 write_exp_elt_opcode (OP_LONG);
599 write_exp_elt_opcode (OP_LONG);
600 write_exp_elt_type (builtin_type_char);
601 write_exp_elt_longcst ((LONGEST)'\0');
602 write_exp_elt_opcode (OP_LONG);
603 write_exp_elt_opcode (OP_ARRAY);
604 write_exp_elt_longcst ((LONGEST) 0);
605 write_exp_elt_longcst ((LONGEST) ($1.length));
606 write_exp_elt_opcode (OP_ARRAY); }
609 exp : NSSTRING /* ObjC NextStep NSString constant
610 * of the form '@' '"' string '"'.
612 { write_exp_elt_opcode (OP_OBJC_NSSTRING);
613 write_exp_string ($1);
614 write_exp_elt_opcode (OP_OBJC_NSSTRING); }
620 $$ = SYMBOL_BLOCK_VALUE ($1.sym);
624 lookup_symtab (copy_name ($1.stoken));
626 $$ = BLOCKVECTOR_BLOCK (BLOCKVECTOR (tem), STATIC_BLOCK);
628 error ("No file or function \"%s\".",
629 copy_name ($1.stoken));
634 block : block COLONCOLON name
636 = lookup_symbol (copy_name ($3), $1,
637 VAR_DOMAIN, (int *) NULL,
638 (struct symtab **) NULL);
639 if (!tem || SYMBOL_CLASS (tem) != LOC_BLOCK)
640 error ("No function \"%s\" in specified context.",
642 $$ = SYMBOL_BLOCK_VALUE (tem); }
645 variable: block COLONCOLON name
646 { struct symbol *sym;
647 sym = lookup_symbol (copy_name ($3), $1,
648 VAR_DOMAIN, (int *) NULL,
649 (struct symtab **) NULL);
651 error ("No symbol \"%s\" in specified context.",
654 write_exp_elt_opcode (OP_VAR_VALUE);
655 /* block_found is set by lookup_symbol. */
656 write_exp_elt_block (block_found);
657 write_exp_elt_sym (sym);
658 write_exp_elt_opcode (OP_VAR_VALUE); }
661 qualified_name: typebase COLONCOLON name
663 struct type *type = $1;
664 if (TYPE_CODE (type) != TYPE_CODE_STRUCT
665 && TYPE_CODE (type) != TYPE_CODE_UNION)
666 error ("`%s' is not defined as an aggregate type.",
669 write_exp_elt_opcode (OP_SCOPE);
670 write_exp_elt_type (type);
671 write_exp_string ($3);
672 write_exp_elt_opcode (OP_SCOPE);
674 | typebase COLONCOLON '~' name
676 struct type *type = $1;
677 struct stoken tmp_token;
678 if (TYPE_CODE (type) != TYPE_CODE_STRUCT
679 && TYPE_CODE (type) != TYPE_CODE_UNION)
680 error ("`%s' is not defined as an aggregate type.",
683 if (!DEPRECATED_STREQ (type_name_no_tag (type), $4.ptr))
684 error ("invalid destructor `%s::~%s'",
685 type_name_no_tag (type), $4.ptr);
687 tmp_token.ptr = (char*) alloca ($4.length + 2);
688 tmp_token.length = $4.length + 1;
689 tmp_token.ptr[0] = '~';
690 memcpy (tmp_token.ptr+1, $4.ptr, $4.length);
691 tmp_token.ptr[tmp_token.length] = 0;
692 write_exp_elt_opcode (OP_SCOPE);
693 write_exp_elt_type (type);
694 write_exp_string (tmp_token);
695 write_exp_elt_opcode (OP_SCOPE);
699 variable: qualified_name
702 char *name = copy_name ($2);
704 struct minimal_symbol *msymbol;
707 lookup_symbol (name, (const struct block *) NULL,
708 VAR_DOMAIN, (int *) NULL,
709 (struct symtab **) NULL);
712 write_exp_elt_opcode (OP_VAR_VALUE);
713 write_exp_elt_block (NULL);
714 write_exp_elt_sym (sym);
715 write_exp_elt_opcode (OP_VAR_VALUE);
719 msymbol = lookup_minimal_symbol (name, NULL, NULL);
722 write_exp_msymbol (msymbol,
723 lookup_function_type (builtin_type_int),
727 if (!have_full_symbols () && !have_partial_symbols ())
728 error ("No symbol table is loaded. Use the \"file\" command.");
730 error ("No symbol \"%s\" in current context.", name);
734 variable: name_not_typename
735 { struct symbol *sym = $1.sym;
739 if (symbol_read_needs_frame (sym))
741 if (innermost_block == 0 ||
742 contained_in (block_found,
744 innermost_block = block_found;
747 write_exp_elt_opcode (OP_VAR_VALUE);
748 /* We want to use the selected frame, not
749 another more inner frame which happens to
750 be in the same block. */
751 write_exp_elt_block (NULL);
752 write_exp_elt_sym (sym);
753 write_exp_elt_opcode (OP_VAR_VALUE);
755 else if ($1.is_a_field_of_this)
757 /* C++/ObjC: it hangs off of `this'/'self'.
758 Must not inadvertently convert from a
759 method call to data ref. */
760 if (innermost_block == 0 ||
761 contained_in (block_found, innermost_block))
762 innermost_block = block_found;
763 write_exp_elt_opcode (OP_OBJC_SELF);
764 write_exp_elt_opcode (OP_OBJC_SELF);
765 write_exp_elt_opcode (STRUCTOP_PTR);
766 write_exp_string ($1.stoken);
767 write_exp_elt_opcode (STRUCTOP_PTR);
771 struct minimal_symbol *msymbol;
772 char *arg = copy_name ($1.stoken);
775 lookup_minimal_symbol (arg, NULL, NULL);
778 write_exp_msymbol (msymbol,
779 lookup_function_type (builtin_type_int),
782 else if (!have_full_symbols () &&
783 !have_partial_symbols ())
784 error ("No symbol table is loaded. Use the \"file\" command.");
786 error ("No symbol \"%s\" in current context.",
787 copy_name ($1.stoken));
794 /* "const" and "volatile" are curently ignored. A type
795 qualifier before the type is currently handled in the
796 typebase rule. The reason for recognizing these here
797 (shift/reduce conflicts) might be obsolete now that some
798 pointer to member rules have been deleted. */
799 | typebase CONST_KEYWORD
800 | typebase VOLATILE_KEYWORD
802 { $$ = follow_types ($1); }
803 | typebase CONST_KEYWORD abs_decl
804 { $$ = follow_types ($1); }
805 | typebase VOLATILE_KEYWORD abs_decl
806 { $$ = follow_types ($1); }
810 { push_type (tp_pointer); $$ = 0; }
812 { push_type (tp_pointer); $$ = $2; }
814 { push_type (tp_reference); $$ = 0; }
816 { push_type (tp_reference); $$ = $2; }
820 direct_abs_decl: '(' abs_decl ')'
822 | direct_abs_decl array_mod
825 push_type (tp_array);
830 push_type (tp_array);
834 | direct_abs_decl func_mod
835 { push_type (tp_function); }
837 { push_type (tp_function); }
848 | '(' nonempty_typelist ')'
849 { free ($2); $$ = 0; }
852 /* We used to try to recognize more pointer to member types here, but
853 that didn't work (shift/reduce conflicts meant that these rules
854 never got executed). The problem is that
855 int (foo::bar::baz::bizzle)
856 is a function type but
857 int (foo::bar::baz::bizzle::*)
858 is a pointer to member type. Stroustrup loses again! */
861 | typebase COLONCOLON '*'
862 { $$ = lookup_member_type (builtin_type_int, $1); }
865 typebase /* Implements (approximately): (type-qualifier)* type-specifier. */
871 error ("No symbol \"%s\" in current context.",
872 copy_name($1.stoken));
877 { $$ = builtin_type_int; }
879 { $$ = builtin_type_long; }
881 { $$ = builtin_type_short; }
883 { $$ = builtin_type_long; }
884 | UNSIGNED LONG INT_KEYWORD
885 { $$ = builtin_type_unsigned_long; }
887 { $$ = builtin_type_long_long; }
888 | LONG LONG INT_KEYWORD
889 { $$ = builtin_type_long_long; }
891 { $$ = builtin_type_unsigned_long_long; }
892 | UNSIGNED LONG LONG INT_KEYWORD
893 { $$ = builtin_type_unsigned_long_long; }
895 { $$ = builtin_type_short; }
896 | UNSIGNED SHORT INT_KEYWORD
897 { $$ = builtin_type_unsigned_short; }
899 { $$ = builtin_type_double; }
900 | LONG DOUBLE_KEYWORD
901 { $$ = builtin_type_long_double; }
903 { $$ = lookup_struct (copy_name ($2),
904 expression_context_block); }
906 { $$ = lookup_struct (copy_name ($2),
907 expression_context_block); }
909 { $$ = lookup_union (copy_name ($2),
910 expression_context_block); }
912 { $$ = lookup_enum (copy_name ($2),
913 expression_context_block); }
915 { $$ = lookup_unsigned_typename (TYPE_NAME($2.type)); }
917 { $$ = builtin_type_unsigned_int; }
918 | SIGNED_KEYWORD typename
919 { $$ = lookup_signed_typename (TYPE_NAME($2.type)); }
921 { $$ = builtin_type_int; }
922 | TEMPLATE name '<' type '>'
923 { $$ = lookup_template_type(copy_name($2), $4,
924 expression_context_block);
926 /* "const" and "volatile" are curently ignored. A type
927 qualifier after the type is handled in the ptype rule. I
928 think these could be too. */
929 | CONST_KEYWORD typebase { $$ = $2; }
930 | VOLATILE_KEYWORD typebase { $$ = $2; }
936 $$.stoken.ptr = "int";
937 $$.stoken.length = 3;
938 $$.type = builtin_type_int;
942 $$.stoken.ptr = "long";
943 $$.stoken.length = 4;
944 $$.type = builtin_type_long;
948 $$.stoken.ptr = "short";
949 $$.stoken.length = 5;
950 $$.type = builtin_type_short;
956 { $$ = (struct type **) malloc (sizeof (struct type *) * 2);
957 $<ivec>$[0] = 1; /* Number of types in vector. */
960 | nonempty_typelist ',' type
961 { int len = sizeof (struct type *) * (++($<ivec>1[0]) + 1);
962 $$ = (struct type **) realloc ((char *) $1, len);
963 $$[$<ivec>$[0]] = $3;
967 name : NAME { $$ = $1.stoken; }
968 | BLOCKNAME { $$ = $1.stoken; }
969 | TYPENAME { $$ = $1.stoken; }
970 | CLASSNAME { $$ = $1.stoken; }
971 | NAME_OR_INT { $$ = $1.stoken; }
974 name_not_typename : NAME
976 /* These would be useful if name_not_typename was useful, but it is
977 just a fake for "variable", so these cause reduce/reduce conflicts
978 because the parser can't tell whether NAME_OR_INT is a
979 name_not_typename (=variable, =exp) or just an exp. If
980 name_not_typename was ever used in an lvalue context where only a
981 name could occur, this might be useful. */
987 /* Take care of parsing a number (anything that starts with a digit).
988 Set yylval and return the token type; update lexptr. LEN is the
989 number of characters in it. */
991 /*** Needs some error checking for the float case. ***/
994 parse_number (p, len, parsed_float, putithere)
1000 /* FIXME: Shouldn't these be unsigned? We don't deal with negative
1001 values here, and we do kind of silly things like cast to
1005 unsigned LONGEST un;
1009 int base = input_radix;
1012 /* Number of "L" suffixes encountered. */
1015 /* We have found a "L" or "U" suffix. */
1016 int found_suffix = 0;
1018 unsigned LONGEST high_bit;
1019 struct type *signed_type;
1020 struct type *unsigned_type;
1026 /* It's a float since it contains a point or an exponent. */
1028 if (sizeof (putithere->typed_val_float.dval) <= sizeof (float))
1029 sscanf (p, "%g", (float *)&putithere->typed_val_float.dval);
1030 else if (sizeof (putithere->typed_val_float.dval) <= sizeof (double))
1031 sscanf (p, "%lg", (double *)&putithere->typed_val_float.dval);
1034 #ifdef PRINTF_HAS_LONG_DOUBLE
1035 sscanf (p, "%Lg", &putithere->typed_val_float.dval);
1037 /* Scan it into a double, then assign it to the long double.
1038 This at least wins with values representable in the range
1041 sscanf (p, "%lg", &temp);
1042 putithere->typed_val_float.dval = temp;
1046 /* See if it has `f' or `l' suffix (float or long double). */
1048 c = tolower (p[len - 1]);
1051 putithere->typed_val_float.type = builtin_type_float;
1053 putithere->typed_val_float.type = builtin_type_long_double;
1054 else if (isdigit (c) || c == '.')
1055 putithere->typed_val_float.type = builtin_type_double;
1062 /* Handle base-switching prefixes 0x, 0t, 0d, and 0. */
1096 if (c >= 'A' && c <= 'Z')
1098 if (c != 'l' && c != 'u')
1100 if (c >= '0' && c <= '9')
1108 if (base > 10 && c >= 'a' && c <= 'f')
1112 n += i = c - 'a' + 10;
1125 return ERROR; /* Char not a digit. */
1128 return ERROR; /* Invalid digit in this base. */
1130 /* Portably test for overflow (only works for nonzero values, so
1131 make a second check for zero). FIXME: Can't we just make n
1132 and prevn unsigned and avoid this? */
1133 if (c != 'l' && c != 'u' && (prevn >= n) && n != 0)
1134 unsigned_p = 1; /* Try something unsigned. */
1136 /* Portably test for unsigned overflow.
1137 FIXME: This check is wrong; for example it doesn't find
1138 overflow on 0x123456789 when LONGEST is 32 bits. */
1139 if (c != 'l' && c != 'u' && n != 0)
1141 if ((unsigned_p && (unsigned LONGEST) prevn >= (unsigned LONGEST) n))
1142 error ("Numeric constant too large.");
1147 /* An integer constant is an int, a long, or a long long. An L
1148 suffix forces it to be long; an LL suffix forces it to be long
1149 long. If not forced to a larger size, it gets the first type of
1150 the above that it fits in. To figure out whether it fits, we
1151 shift it right and see whether anything remains. Note that we
1152 can't shift sizeof (LONGEST) * HOST_CHAR_BIT bits or more in one
1153 operation, because many compilers will warn about such a shift
1154 (which always produces a zero result). Sometimes TARGET_INT_BIT
1155 or TARGET_LONG_BIT will be that big, sometimes not. To deal with
1156 the case where it is we just always shift the value more than
1157 once, with fewer bits each time. */
1159 un = (unsigned LONGEST)n >> 2;
1161 && (un >> (TARGET_INT_BIT - 2)) == 0)
1163 high_bit = ((unsigned LONGEST)1) << (TARGET_INT_BIT-1);
1165 /* A large decimal (not hex or octal) constant (between INT_MAX
1166 and UINT_MAX) is a long or unsigned long, according to ANSI,
1167 never an unsigned int, but this code treats it as unsigned
1168 int. This probably should be fixed. GCC gives a warning on
1171 unsigned_type = builtin_type_unsigned_int;
1172 signed_type = builtin_type_int;
1174 else if (long_p <= 1
1175 && (un >> (TARGET_LONG_BIT - 2)) == 0)
1177 high_bit = ((unsigned LONGEST)1) << (TARGET_LONG_BIT-1);
1178 unsigned_type = builtin_type_unsigned_long;
1179 signed_type = builtin_type_long;
1183 high_bit = (((unsigned LONGEST)1)
1184 << (TARGET_LONG_LONG_BIT - 32 - 1)
1188 /* A long long does not fit in a LONGEST. */
1190 (unsigned LONGEST)1 << (sizeof (LONGEST) * HOST_CHAR_BIT - 1);
1191 unsigned_type = builtin_type_unsigned_long_long;
1192 signed_type = builtin_type_long_long;
1195 putithere->typed_val_int.val = n;
1197 /* If the high bit of the worked out type is set then this number
1198 has to be unsigned. */
1200 if (unsigned_p || (n & high_bit))
1202 putithere->typed_val_int.type = unsigned_type;
1206 putithere->typed_val_int.type = signed_type;
1216 enum exp_opcode opcode;
1219 static const struct token tokentab3[] =
1221 {">>=", ASSIGN_MODIFY, BINOP_RSH},
1222 {"<<=", ASSIGN_MODIFY, BINOP_LSH}
1225 static const struct token tokentab2[] =
1227 {"+=", ASSIGN_MODIFY, BINOP_ADD},
1228 {"-=", ASSIGN_MODIFY, BINOP_SUB},
1229 {"*=", ASSIGN_MODIFY, BINOP_MUL},
1230 {"/=", ASSIGN_MODIFY, BINOP_DIV},
1231 {"%=", ASSIGN_MODIFY, BINOP_REM},
1232 {"|=", ASSIGN_MODIFY, BINOP_BITWISE_IOR},
1233 {"&=", ASSIGN_MODIFY, BINOP_BITWISE_AND},
1234 {"^=", ASSIGN_MODIFY, BINOP_BITWISE_XOR},
1235 {"++", INCREMENT, BINOP_END},
1236 {"--", DECREMENT, BINOP_END},
1237 {"->", ARROW, BINOP_END},
1238 {"&&", ANDAND, BINOP_END},
1239 {"||", OROR, BINOP_END},
1240 {"::", COLONCOLON, BINOP_END},
1241 {"<<", LSH, BINOP_END},
1242 {">>", RSH, BINOP_END},
1243 {"==", EQUAL, BINOP_END},
1244 {"!=", NOTEQUAL, BINOP_END},
1245 {"<=", LEQ, BINOP_END},
1246 {">=", GEQ, BINOP_END}
1249 /* Read one token, getting characters through lexptr. */
1260 static char *tempbuf;
1261 static int tempbufsize;
1266 /* See if it is a special token of length 3. */
1267 for (i = 0; i < sizeof tokentab3 / sizeof tokentab3[0]; i++)
1268 if (DEPRECATED_STREQN (tokstart, tokentab3[i].operator, 3))
1271 yylval.opcode = tokentab3[i].opcode;
1272 return tokentab3[i].token;
1275 /* See if it is a special token of length 2. */
1276 for (i = 0; i < sizeof tokentab2 / sizeof tokentab2[0]; i++)
1277 if (DEPRECATED_STREQN (tokstart, tokentab2[i].operator, 2))
1280 yylval.opcode = tokentab2[i].opcode;
1281 return tokentab2[i].token;
1285 switch (tokchr = *tokstart)
1297 /* We either have a character constant ('0' or '\177' for
1298 example) or we have a quoted symbol reference ('foo(int,int)'
1299 in C++ for example). */
1303 c = parse_escape (&lexptr);
1305 error ("Empty character constant.");
1307 yylval.typed_val_int.val = c;
1308 yylval.typed_val_int.type = builtin_type_char;
1313 namelen = skip_quoted (tokstart) - tokstart;
1316 lexptr = tokstart + namelen;
1317 if (lexptr[-1] != '\'')
1318 error ("Unmatched single quote.");
1323 error ("Invalid character constant.");
1333 if (paren_depth == 0)
1340 if (comma_terminates && paren_depth == 0)
1346 /* Might be a floating point number. */
1347 if (lexptr[1] < '0' || lexptr[1] > '9')
1348 goto symbol; /* Nope, must be a symbol. */
1349 /* FALL THRU into number case. */
1362 /* It's a number. */
1363 int got_dot = 0, got_e = 0, toktype = FLOAT;
1364 /* Initialize toktype to anything other than ERROR. */
1366 int hex = input_radix > 10;
1367 int local_radix = input_radix;
1368 if (tokchr == '0' && (p[1] == 'x' || p[1] == 'X'))
1374 else if (tokchr == '0' && (p[1]=='t' || p[1]=='T' || p[1]=='d' || p[1]=='D'))
1383 /* This test includes !hex because 'e' is a valid hex digit
1384 and thus does not indicate a floating point number when
1385 the radix is hex. */
1387 if (!hex && (*p == 'e' || *p == 'E'))
1389 toktype = ERROR; /* Only one 'e' in a float. */
1392 /* This test does not include !hex, because a '.' always
1393 indicates a decimal floating point number regardless of
1397 toktype = ERROR; /* Only one '.' in a float. */
1400 else if (got_e && (p[-1] == 'e' || p[-1] == 'E') &&
1401 (*p == '-' || *p == '+'))
1402 /* This is the sign of the exponent, not the end of the
1405 /* Always take decimal digits; parse_number handles radix
1407 else if (*p >= '0' && *p <= '9')
1409 /* We will take letters only if hex is true, and only up
1410 to what the input radix would permit. FSF was content
1411 to rely on parse_number to validate; but it leaks. */
1412 else if (*p >= 'a' && *p <= 'z')
1414 if (!hex || *p >= ('a' + local_radix - 10))
1417 else if (*p >= 'A' && *p <= 'Z')
1419 if (!hex || *p >= ('A' + local_radix - 10))
1424 if (toktype != ERROR)
1425 toktype = parse_number (tokstart, p - tokstart,
1426 got_dot | got_e, &yylval);
1427 if (toktype == ERROR)
1429 char *err_copy = (char *) alloca (p - tokstart + 1);
1431 memcpy (err_copy, tokstart, p - tokstart);
1432 err_copy[p - tokstart] = 0;
1433 error ("Invalid number \"%s\".", err_copy);
1450 case '@': /* Moved out below. */
1466 if (strncmp(tokstart, "@selector", 9) == 0)
1468 tokptr = strchr(tokstart, '(');
1471 error ("Missing '(' in @selector(...)");
1474 tokptr++; /* Skip the '('. */
1476 /* Grow the static temp buffer if necessary, including
1477 allocating the first one on demand. */
1478 if (tempbufindex + 1 >= tempbufsize)
1480 tempbuf = (char *) realloc (tempbuf, tempbufsize += 64);
1482 tempbuf[tempbufindex++] = *tokptr++;
1483 } while ((*tokptr != ')') && (*tokptr != '\0'));
1484 if (*tokptr++ != ')')
1486 error ("Missing ')' in @selector(...)");
1488 tempbuf[tempbufindex] = '\0';
1489 yylval.sval.ptr = tempbuf;
1490 yylval.sval.length = tempbufindex;
1494 if (tokstart[1] != '"')
1499 /* ObjC NextStep NSString constant: fall thru and parse like
1505 /* Build the gdb internal form of the input string in tempbuf,
1506 translating any standard C escape forms seen. Note that the
1507 buffer is null byte terminated *only* for the convenience of
1508 debugging gdb itself and printing the buffer contents when
1509 the buffer contains no embedded nulls. Gdb does not depend
1510 upon the buffer being null byte terminated, it uses the
1511 length string instead. This allows gdb to handle C strings
1512 (as well as strings in other languages) with embedded null
1515 tokptr = ++tokstart;
1519 /* Grow the static temp buffer if necessary, including
1520 allocating the first one on demand. */
1521 if (tempbufindex + 1 >= tempbufsize)
1523 tempbuf = (char *) realloc (tempbuf, tempbufsize += 64);
1529 /* Do nothing, loop will terminate. */
1533 c = parse_escape (&tokptr);
1538 tempbuf[tempbufindex++] = c;
1541 tempbuf[tempbufindex++] = *tokptr++;
1544 } while ((*tokptr != '"') && (*tokptr != '\0'));
1545 if (*tokptr++ != '"')
1547 error ("Unterminated string in expression.");
1549 tempbuf[tempbufindex] = '\0'; /* See note above. */
1550 yylval.sval.ptr = tempbuf;
1551 yylval.sval.length = tempbufindex;
1553 return (tokchr == '@' ? NSSTRING : STRING);
1556 if (!(tokchr == '_' || tokchr == '$' ||
1557 (tokchr >= 'a' && tokchr <= 'z') || (tokchr >= 'A' && tokchr <= 'Z')))
1558 /* We must have come across a bad character (e.g. ';'). */
1559 error ("Invalid character '%c' in expression.", c);
1561 /* It's a name. See how long it is. */
1563 for (c = tokstart[namelen];
1564 (c == '_' || c == '$' || (c >= '0' && c <= '9')
1565 || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '<');)
1570 while (tokstart[++i] && tokstart[i] != '>');
1571 if (tokstart[i] == '>')
1574 c = tokstart[++namelen];
1577 /* The token "if" terminates the expression and is NOT
1578 removed from the input stream. */
1579 if (namelen == 2 && tokstart[0] == 'i' && tokstart[1] == 'f')
1588 /* Catch specific keywords. Should be done with a data structure. */
1592 if (DEPRECATED_STREQN (tokstart, "unsigned", 8))
1594 if (current_language->la_language == language_cplus
1595 && strncmp (tokstart, "template", 8) == 0)
1597 if (DEPRECATED_STREQN (tokstart, "volatile", 8))
1598 return VOLATILE_KEYWORD;
1601 if (DEPRECATED_STREQN (tokstart, "struct", 6))
1603 if (DEPRECATED_STREQN (tokstart, "signed", 6))
1604 return SIGNED_KEYWORD;
1605 if (DEPRECATED_STREQN (tokstart, "sizeof", 6))
1607 if (DEPRECATED_STREQN (tokstart, "double", 6))
1608 return DOUBLE_KEYWORD;
1611 if ((current_language->la_language == language_cplus)
1612 && strncmp (tokstart, "class", 5) == 0)
1614 if (DEPRECATED_STREQN (tokstart, "union", 5))
1616 if (DEPRECATED_STREQN (tokstart, "short", 5))
1618 if (DEPRECATED_STREQN (tokstart, "const", 5))
1619 return CONST_KEYWORD;
1622 if (DEPRECATED_STREQN (tokstart, "enum", 4))
1624 if (DEPRECATED_STREQN (tokstart, "long", 4))
1628 if (DEPRECATED_STREQN (tokstart, "int", 3))
1635 yylval.sval.ptr = tokstart;
1636 yylval.sval.length = namelen;
1638 if (*tokstart == '$')
1640 write_dollar_variable (yylval.sval);
1644 /* Use token-type BLOCKNAME for symbols that happen to be defined as
1645 functions or symtabs. If this is not so, then ...
1646 Use token-type TYPENAME for symbols that happen to be defined
1647 currently as names of types; NAME for other symbols.
1648 The caller is not constrained to care about the distinction. */
1650 char *tmp = copy_name (yylval.sval);
1652 int is_a_field_of_this = 0, *need_this;
1655 if (current_language->la_language == language_cplus ||
1656 current_language->la_language == language_objc)
1657 need_this = &is_a_field_of_this;
1659 need_this = (int *) NULL;
1661 sym = lookup_symbol (tmp, expression_context_block,
1664 (struct symtab **) NULL);
1665 /* Call lookup_symtab, not lookup_partial_symtab, in case there
1666 are no psymtabs (coff, xcoff, or some future change to blow
1667 away the psymtabs once symbols are read). */
1668 if ((sym && SYMBOL_CLASS (sym) == LOC_BLOCK) ||
1669 lookup_symtab (tmp))
1671 yylval.ssym.sym = sym;
1672 yylval.ssym.is_a_field_of_this = is_a_field_of_this;
1675 if (sym && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
1678 /* Despite the following flaw, we need to keep this code
1679 enabled. Because we can get called from
1680 check_stub_method, if we don't handle nested types then
1681 it screws many operations in any program which uses
1683 /* In "A::x", if x is a member function of A and there
1684 happens to be a type (nested or not, since the stabs
1685 don't make that distinction) named x, then this code
1686 incorrectly thinks we are dealing with nested types
1687 rather than a member function. */
1691 struct symbol *best_sym;
1693 /* Look ahead to detect nested types. This probably should
1694 be done in the grammar, but trying seemed to introduce a
1695 lot of shift/reduce and reduce/reduce conflicts. It's
1696 possible that it could be done, though. Or perhaps a
1697 non-grammar, but less ad hoc, approach would work well. */
1699 /* Since we do not currently have any way of distinguishing
1700 a nested type from a non-nested one (the stabs don't tell
1701 us whether a type is nested), we just ignore the
1708 /* Skip whitespace. */
1709 while (*p == ' ' || *p == '\t' || *p == '\n')
1711 if (*p == ':' && p[1] == ':')
1713 /* Skip the `::'. */
1715 /* Skip whitespace. */
1716 while (*p == ' ' || *p == '\t' || *p == '\n')
1719 while (*p == '_' || *p == '$' || (*p >= '0' && *p <= '9')
1720 || (*p >= 'a' && *p <= 'z')
1721 || (*p >= 'A' && *p <= 'Z'))
1725 struct symbol *cur_sym;
1726 /* As big as the whole rest of the expression,
1727 which is at least big enough. */
1728 char *ncopy = alloca (strlen (tmp) +
1729 strlen (namestart) + 3);
1733 memcpy (tmp1, tmp, strlen (tmp));
1734 tmp1 += strlen (tmp);
1735 memcpy (tmp1, "::", 2);
1737 memcpy (tmp1, namestart, p - namestart);
1738 tmp1[p - namestart] = '\0';
1739 cur_sym = lookup_symbol (ncopy,
1740 expression_context_block,
1741 VAR_DOMAIN, (int *) NULL,
1742 (struct symtab **) NULL);
1745 if (SYMBOL_CLASS (cur_sym) == LOC_TYPEDEF)
1763 yylval.tsym.type = SYMBOL_TYPE (best_sym);
1765 yylval.tsym.type = SYMBOL_TYPE (sym);
1769 if ((yylval.tsym.type = lookup_primitive_typename (tmp)) != 0)
1772 /* See if it's an ObjC classname. */
1775 CORE_ADDR Class = lookup_objc_class(tmp);
1778 yylval.class.class = Class;
1779 if ((sym = lookup_struct_typedef (tmp,
1780 expression_context_block,
1782 yylval.class.type = SYMBOL_TYPE (sym);
1787 /* Input names that aren't symbols but ARE valid hex numbers,
1788 when the input radix permits them, can be names or numbers
1789 depending on the parse. Note we support radixes > 16 here. */
1791 ((tokstart[0] >= 'a' && tokstart[0] < 'a' + input_radix - 10) ||
1792 (tokstart[0] >= 'A' && tokstart[0] < 'A' + input_radix - 10)))
1794 YYSTYPE newlval; /* Its value is ignored. */
1795 hextype = parse_number (tokstart, namelen, 0, &newlval);
1798 yylval.ssym.sym = sym;
1799 yylval.ssym.is_a_field_of_this = is_a_field_of_this;
1804 /* Any other kind of symbol. */
1805 yylval.ssym.sym = sym;
1806 yylval.ssym.is_a_field_of_this = is_a_field_of_this;
1815 if (*lexptr == '\0')
1816 error("A %s near end of expression.", (msg ? msg : "error"));
1818 error ("A %s in expression, near `%s'.", (msg ? msg : "error"),