1 /* YACC parser for Fortran expressions, for GDB.
2 Copyright 1986, 1989, 1990, 1991, 1993, 1994, 1995, 1996, 2000, 2001
3 Free Software Foundation, Inc.
5 Contributed by Motorola. Adapted from the C parser by Farooq Butt
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
24 /* This was blantantly ripped off the C expression parser, please
25 be aware of that as you look at its basic structure -FMB */
27 /* Parse a F77 expression from text in a string,
28 and return the result as a struct expression pointer.
29 That structure contains arithmetic operations in reverse polish,
30 with constants represented by operations that are followed by special data.
31 See expression.h for the details of the format.
32 What is important here is that it can be built up sequentially
33 during the process of parsing; the lower levels of the tree always
34 come first in the result.
36 Note that malloc's and realloc's in this file are transformed to
37 xmalloc and xrealloc respectively by the same sed command in the
38 makefile that remaps any other malloc/realloc inserted by the parser
39 generator. Doing this with #defines and trying to control the interaction
40 with include files (<malloc.h> and <stdlib.h> for example) just became
41 too messy, particularly when such includes can be inserted at random
42 times by the parser generator. */
47 #include "gdb_string.h"
48 #include "expression.h"
50 #include "parser-defs.h"
53 #include "bfd.h" /* Required by objfiles.h. */
54 #include "symfile.h" /* Required by objfiles.h. */
55 #include "objfiles.h" /* For have_full_symbols and have_partial_symbols */
59 /* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc),
60 as well as gratuitiously global symbol names, so we can have multiple
61 yacc generated parsers in gdb. Note that these are only the variables
62 produced by yacc. If other parser generators (bison, byacc, etc) produce
63 additional global names that conflict at link time, then those parser
64 generators need to be fixed instead of adding those names to this list. */
66 #define yymaxdepth f_maxdepth
67 #define yyparse f_parse
69 #define yyerror f_error
72 #define yydebug f_debug
81 #define yyerrflag f_errflag
82 #define yynerrs f_nerrs
87 #define yystate f_state
93 #define yyreds f_reds /* With YYDEBUG defined */
94 #define yytoks f_toks /* With YYDEBUG defined */
95 #define yyname f_name /* With YYDEBUG defined */
96 #define yyrule f_rule /* With YYDEBUG defined */
99 #define yydefred f_yydefred
100 #define yydgoto f_yydgoto
101 #define yysindex f_yysindex
102 #define yyrindex f_yyrindex
103 #define yygindex f_yygindex
104 #define yytable f_yytable
105 #define yycheck f_yycheck
108 #define YYDEBUG 1 /* Default to yydebug support */
111 #define YYFPRINTF parser_fprintf
115 static int yylex (void);
117 void yyerror (char *);
119 static void growbuf_by_size (int);
121 static int match_string_literal (void);
125 /* Although the yacc "value" of an expression is not used,
126 since the result is stored in the structure being created,
127 other node types do have values. */
141 struct symtoken ssym;
144 enum exp_opcode opcode;
145 struct internalvar *ivar;
152 /* YYSTYPE gets defined by %union */
153 static int parse_number (char *, int, int, YYSTYPE *);
156 %type <voidval> exp type_exp start variable
157 %type <tval> type typebase
158 %type <tvec> nonempty_typelist
159 /* %type <bval> block */
161 /* Fancy type parsing. */
162 %type <voidval> func_mod direct_abs_decl abs_decl
165 %token <typed_val> INT
168 /* Both NAME and TYPENAME tokens represent symbols in the input,
169 and both convey their data as strings.
170 But a TYPENAME is a string that happens to be defined as a typedef
171 or builtin type name (such as int or char)
172 and a NAME is any other symbol.
173 Contexts where this distinction is not important can use the
174 nonterminal "name", which matches either NAME or TYPENAME. */
176 %token <sval> STRING_LITERAL
177 %token <lval> BOOLEAN_LITERAL
179 %token <tsym> TYPENAME
180 %type <ssym> name_not_typename
182 /* A NAME_OR_INT is a symbol which is not known in the symbol table,
183 but which would parse as a valid number in the current input radix.
184 E.g. "c" when input_radix==16. Depending on the parse, it will be
185 turned into a name or into a number. */
187 %token <ssym> NAME_OR_INT
192 /* Special type cases, put in to allow the parser to distinguish different
194 %token INT_KEYWORD INT_S2_KEYWORD LOGICAL_S1_KEYWORD LOGICAL_S2_KEYWORD
195 %token LOGICAL_KEYWORD REAL_KEYWORD REAL_S8_KEYWORD REAL_S16_KEYWORD
196 %token COMPLEX_S8_KEYWORD COMPLEX_S16_KEYWORD COMPLEX_S32_KEYWORD
197 %token BOOL_AND BOOL_OR BOOL_NOT
198 %token <lval> CHARACTER
200 %token <voidval> VARIABLE
202 %token <opcode> ASSIGN_MODIFY
206 %right '=' ASSIGN_MODIFY
215 %left LESSTHAN GREATERTHAN LEQ GEQ
231 { write_exp_elt_opcode(OP_TYPE);
232 write_exp_elt_type($1);
233 write_exp_elt_opcode(OP_TYPE); }
240 /* Expressions, not including the comma operator. */
241 exp : '*' exp %prec UNARY
242 { write_exp_elt_opcode (UNOP_IND); }
245 exp : '&' exp %prec UNARY
246 { write_exp_elt_opcode (UNOP_ADDR); }
249 exp : '-' exp %prec UNARY
250 { write_exp_elt_opcode (UNOP_NEG); }
253 exp : BOOL_NOT exp %prec UNARY
254 { write_exp_elt_opcode (UNOP_LOGICAL_NOT); }
257 exp : '~' exp %prec UNARY
258 { write_exp_elt_opcode (UNOP_COMPLEMENT); }
261 exp : SIZEOF exp %prec UNARY
262 { write_exp_elt_opcode (UNOP_SIZEOF); }
265 /* No more explicit array operators, we treat everything in F77 as
266 a function call. The disambiguation as to whether we are
267 doing a subscript operation or a function call is done
271 { start_arglist (); }
273 { write_exp_elt_opcode (OP_F77_UNDETERMINED_ARGLIST);
274 write_exp_elt_longcst ((LONGEST) end_arglist ());
275 write_exp_elt_opcode (OP_F77_UNDETERMINED_ARGLIST); }
289 arglist : arglist ',' exp %prec ABOVE_COMMA
293 substring: exp ':' exp %prec ABOVE_COMMA
298 complexnum: exp ',' exp
302 exp : '(' complexnum ')'
303 { write_exp_elt_opcode(OP_COMPLEX); }
306 exp : '(' type ')' exp %prec UNARY
307 { write_exp_elt_opcode (UNOP_CAST);
308 write_exp_elt_type ($2);
309 write_exp_elt_opcode (UNOP_CAST); }
312 /* Binary operators in order of decreasing precedence. */
315 { write_exp_elt_opcode (BINOP_REPEAT); }
319 { write_exp_elt_opcode (BINOP_MUL); }
323 { write_exp_elt_opcode (BINOP_DIV); }
327 { write_exp_elt_opcode (BINOP_REM); }
331 { write_exp_elt_opcode (BINOP_ADD); }
335 { write_exp_elt_opcode (BINOP_SUB); }
339 { write_exp_elt_opcode (BINOP_LSH); }
343 { write_exp_elt_opcode (BINOP_RSH); }
347 { write_exp_elt_opcode (BINOP_EQUAL); }
350 exp : exp NOTEQUAL exp
351 { write_exp_elt_opcode (BINOP_NOTEQUAL); }
355 { write_exp_elt_opcode (BINOP_LEQ); }
359 { write_exp_elt_opcode (BINOP_GEQ); }
362 exp : exp LESSTHAN exp
363 { write_exp_elt_opcode (BINOP_LESS); }
366 exp : exp GREATERTHAN exp
367 { write_exp_elt_opcode (BINOP_GTR); }
371 { write_exp_elt_opcode (BINOP_BITWISE_AND); }
375 { write_exp_elt_opcode (BINOP_BITWISE_XOR); }
379 { write_exp_elt_opcode (BINOP_BITWISE_IOR); }
382 exp : exp BOOL_AND exp
383 { write_exp_elt_opcode (BINOP_LOGICAL_AND); }
387 exp : exp BOOL_OR exp
388 { write_exp_elt_opcode (BINOP_LOGICAL_OR); }
392 { write_exp_elt_opcode (BINOP_ASSIGN); }
395 exp : exp ASSIGN_MODIFY exp
396 { write_exp_elt_opcode (BINOP_ASSIGN_MODIFY);
397 write_exp_elt_opcode ($2);
398 write_exp_elt_opcode (BINOP_ASSIGN_MODIFY); }
402 { write_exp_elt_opcode (OP_LONG);
403 write_exp_elt_type ($1.type);
404 write_exp_elt_longcst ((LONGEST)($1.val));
405 write_exp_elt_opcode (OP_LONG); }
410 parse_number ($1.stoken.ptr, $1.stoken.length, 0, &val);
411 write_exp_elt_opcode (OP_LONG);
412 write_exp_elt_type (val.typed_val.type);
413 write_exp_elt_longcst ((LONGEST)val.typed_val.val);
414 write_exp_elt_opcode (OP_LONG); }
418 { write_exp_elt_opcode (OP_DOUBLE);
419 write_exp_elt_type (builtin_type_f_real_s8);
420 write_exp_elt_dblcst ($1);
421 write_exp_elt_opcode (OP_DOUBLE); }
430 exp : SIZEOF '(' type ')' %prec UNARY
431 { write_exp_elt_opcode (OP_LONG);
432 write_exp_elt_type (builtin_type_f_integer);
434 write_exp_elt_longcst ((LONGEST) TYPE_LENGTH ($3));
435 write_exp_elt_opcode (OP_LONG); }
438 exp : BOOLEAN_LITERAL
439 { write_exp_elt_opcode (OP_BOOL);
440 write_exp_elt_longcst ((LONGEST) $1);
441 write_exp_elt_opcode (OP_BOOL);
447 write_exp_elt_opcode (OP_STRING);
448 write_exp_string ($1);
449 write_exp_elt_opcode (OP_STRING);
453 variable: name_not_typename
454 { struct symbol *sym = $1.sym;
458 if (symbol_read_needs_frame (sym))
460 if (innermost_block == 0 ||
461 contained_in (block_found,
463 innermost_block = block_found;
465 write_exp_elt_opcode (OP_VAR_VALUE);
466 /* We want to use the selected frame, not
467 another more inner frame which happens to
468 be in the same block. */
469 write_exp_elt_block (NULL);
470 write_exp_elt_sym (sym);
471 write_exp_elt_opcode (OP_VAR_VALUE);
476 struct minimal_symbol *msymbol;
477 char *arg = copy_name ($1.stoken);
480 lookup_minimal_symbol (arg, NULL, NULL);
483 write_exp_msymbol (msymbol,
484 lookup_function_type (builtin_type_int),
487 else if (!have_full_symbols () && !have_partial_symbols ())
488 error ("No symbol table is loaded. Use the \"file\" command.");
490 error ("No symbol \"%s\" in current context.",
491 copy_name ($1.stoken));
503 /* This is where the interesting stuff happens. */
506 struct type *follow_type = $1;
507 struct type *range_type;
516 follow_type = lookup_pointer_type (follow_type);
519 follow_type = lookup_reference_type (follow_type);
522 array_size = pop_type_int ();
523 if (array_size != -1)
526 create_range_type ((struct type *) NULL,
527 builtin_type_f_integer, 0,
530 create_array_type ((struct type *) NULL,
531 follow_type, range_type);
534 follow_type = lookup_pointer_type (follow_type);
537 follow_type = lookup_function_type (follow_type);
545 { push_type (tp_pointer); $$ = 0; }
547 { push_type (tp_pointer); $$ = $2; }
549 { push_type (tp_reference); $$ = 0; }
551 { push_type (tp_reference); $$ = $2; }
555 direct_abs_decl: '(' abs_decl ')'
557 | direct_abs_decl func_mod
558 { push_type (tp_function); }
560 { push_type (tp_function); }
565 | '(' nonempty_typelist ')'
566 { free ($2); $$ = 0; }
569 typebase /* Implements (approximately): (type-qualifier)* type-specifier */
573 { $$ = builtin_type_f_integer; }
575 { $$ = builtin_type_f_integer_s2; }
577 { $$ = builtin_type_f_character; }
579 { $$ = builtin_type_f_logical;}
581 { $$ = builtin_type_f_logical_s2;}
583 { $$ = builtin_type_f_logical_s1;}
585 { $$ = builtin_type_f_real;}
587 { $$ = builtin_type_f_real_s8;}
589 { $$ = builtin_type_f_real_s16;}
591 { $$ = builtin_type_f_complex_s8;}
592 | COMPLEX_S16_KEYWORD
593 { $$ = builtin_type_f_complex_s16;}
594 | COMPLEX_S32_KEYWORD
595 { $$ = builtin_type_f_complex_s32;}
600 { $$ = (struct type **) malloc (sizeof (struct type *) * 2);
601 $<ivec>$[0] = 1; /* Number of types in vector */
604 | nonempty_typelist ',' type
605 { int len = sizeof (struct type *) * (++($<ivec>1[0]) + 1);
606 $$ = (struct type **) realloc ((char *) $1, len);
607 $$[$<ivec>$[0]] = $3;
611 name_not_typename : NAME
612 /* These would be useful if name_not_typename was useful, but it is just
613 a fake for "variable", so these cause reduce/reduce conflicts because
614 the parser can't tell whether NAME_OR_INT is a name_not_typename (=variable,
615 =exp) or just an exp. If name_not_typename was ever used in an lvalue
616 context where only a name could occur, this might be useful.
623 /* Take care of parsing a number (anything that starts with a digit).
624 Set yylval and return the token type; update lexptr.
625 LEN is the number of characters in it. */
627 /*** Needs some error checking for the float case ***/
630 parse_number (p, len, parsed_float, putithere)
639 int base = input_radix;
643 struct type *signed_type;
644 struct type *unsigned_type;
648 /* It's a float since it contains a point or an exponent. */
649 /* [dD] is not understood as an exponent by atof, change it to 'e'. */
653 for (tmp2 = tmp; *tmp2; ++tmp2)
654 if (*tmp2 == 'd' || *tmp2 == 'D')
656 putithere->dval = atof (tmp);
661 /* Handle base-switching prefixes 0x, 0t, 0d, 0 */
697 if (len == 0 && c == 'l')
699 else if (len == 0 && c == 'u')
704 if (c >= '0' && c <= '9')
706 else if (c >= 'a' && c <= 'f')
709 return ERROR; /* Char not a digit */
711 return ERROR; /* Invalid digit in this base */
715 /* Portably test for overflow (only works for nonzero values, so make
716 a second check for zero). */
717 if ((prevn >= n) && n != 0)
718 unsigned_p=1; /* Try something unsigned */
719 /* If range checking enabled, portably test for unsigned overflow. */
720 if (RANGE_CHECK && n != 0)
722 if ((unsigned_p && (unsigned)prevn >= (unsigned)n))
723 range_error("Overflow on numeric constant.");
728 /* If the number is too big to be an int, or it's got an l suffix
729 then it's a long. Work out if this has to be a long by
730 shifting right and and seeing if anything remains, and the
731 target int size is different to the target long size.
733 In the expression below, we could have tested
734 (n >> TARGET_INT_BIT)
735 to see if it was zero,
736 but too many compilers warn about that, when ints and longs
737 are the same size. So we shift it twice, with fewer bits
738 each time, for the same result. */
740 if ((TARGET_INT_BIT != TARGET_LONG_BIT
741 && ((n >> 2) >> (TARGET_INT_BIT-2))) /* Avoid shift warning */
744 high_bit = ((ULONGEST)1) << (TARGET_LONG_BIT-1);
745 unsigned_type = builtin_type_unsigned_long;
746 signed_type = builtin_type_long;
750 high_bit = ((ULONGEST)1) << (TARGET_INT_BIT-1);
751 unsigned_type = builtin_type_unsigned_int;
752 signed_type = builtin_type_int;
755 putithere->typed_val.val = n;
757 /* If the high bit of the worked out type is set then this number
758 has to be unsigned. */
760 if (unsigned_p || (n & high_bit))
761 putithere->typed_val.type = unsigned_type;
763 putithere->typed_val.type = signed_type;
772 enum exp_opcode opcode;
775 static const struct token dot_ops[] =
777 { ".and.", BOOL_AND, BINOP_END },
778 { ".AND.", BOOL_AND, BINOP_END },
779 { ".or.", BOOL_OR, BINOP_END },
780 { ".OR.", BOOL_OR, BINOP_END },
781 { ".not.", BOOL_NOT, BINOP_END },
782 { ".NOT.", BOOL_NOT, BINOP_END },
783 { ".eq.", EQUAL, BINOP_END },
784 { ".EQ.", EQUAL, BINOP_END },
785 { ".eqv.", EQUAL, BINOP_END },
786 { ".NEQV.", NOTEQUAL, BINOP_END },
787 { ".neqv.", NOTEQUAL, BINOP_END },
788 { ".EQV.", EQUAL, BINOP_END },
789 { ".ne.", NOTEQUAL, BINOP_END },
790 { ".NE.", NOTEQUAL, BINOP_END },
791 { ".le.", LEQ, BINOP_END },
792 { ".LE.", LEQ, BINOP_END },
793 { ".ge.", GEQ, BINOP_END },
794 { ".GE.", GEQ, BINOP_END },
795 { ".gt.", GREATERTHAN, BINOP_END },
796 { ".GT.", GREATERTHAN, BINOP_END },
797 { ".lt.", LESSTHAN, BINOP_END },
798 { ".LT.", LESSTHAN, BINOP_END },
802 struct f77_boolean_val
808 static const struct f77_boolean_val boolean_values[] =
817 static const struct token f77_keywords[] =
819 { "complex_16", COMPLEX_S16_KEYWORD, BINOP_END },
820 { "complex_32", COMPLEX_S32_KEYWORD, BINOP_END },
821 { "character", CHARACTER, BINOP_END },
822 { "integer_2", INT_S2_KEYWORD, BINOP_END },
823 { "logical_1", LOGICAL_S1_KEYWORD, BINOP_END },
824 { "logical_2", LOGICAL_S2_KEYWORD, BINOP_END },
825 { "complex_8", COMPLEX_S8_KEYWORD, BINOP_END },
826 { "integer", INT_KEYWORD, BINOP_END },
827 { "logical", LOGICAL_KEYWORD, BINOP_END },
828 { "real_16", REAL_S16_KEYWORD, BINOP_END },
829 { "complex", COMPLEX_S8_KEYWORD, BINOP_END },
830 { "sizeof", SIZEOF, BINOP_END },
831 { "real_8", REAL_S8_KEYWORD, BINOP_END },
832 { "real", REAL_KEYWORD, BINOP_END },
836 /* Implementation of a dynamically expandable buffer for processing input
837 characters acquired through lexptr and building a value to return in
838 yylval. Ripped off from ch-exp.y */
840 static char *tempbuf; /* Current buffer contents */
841 static int tempbufsize; /* Size of allocated buffer */
842 static int tempbufindex; /* Current index into buffer */
844 #define GROWBY_MIN_SIZE 64 /* Minimum amount to grow buffer by */
846 #define CHECKBUF(size) \
848 if (tempbufindex + (size) >= tempbufsize) \
850 growbuf_by_size (size); \
855 /* Grow the static temp buffer if necessary, including allocating the first one
859 growbuf_by_size (count)
864 growby = max (count, GROWBY_MIN_SIZE);
865 tempbufsize += growby;
867 tempbuf = (char *) malloc (tempbufsize);
869 tempbuf = (char *) realloc (tempbuf, tempbufsize);
872 /* Blatantly ripped off from ch-exp.y. This routine recognizes F77
875 Recognize a string literal. A string literal is a nonzero sequence
876 of characters enclosed in matching single quotes, except that
877 a single character inside single quotes is a character literal, which
878 we reject as a string literal. To embed the terminator character inside
879 a string, it is simply doubled (I.E. 'this''is''one''string') */
882 match_string_literal ()
884 char *tokptr = lexptr;
886 for (tempbufindex = 0, tokptr++; *tokptr != '\0'; tokptr++)
889 if (*tokptr == *lexptr)
891 if (*(tokptr + 1) == *lexptr)
896 tempbuf[tempbufindex++] = *tokptr;
898 if (*tokptr == '\0' /* no terminator */
899 || tempbufindex == 0) /* no string */
903 tempbuf[tempbufindex] = '\0';
904 yylval.sval.ptr = tempbuf;
905 yylval.sval.length = tempbufindex;
907 return STRING_LITERAL;
911 /* Read one token, getting characters through lexptr. */
918 unsigned int i,token;
923 prev_lexptr = lexptr;
927 /* First of all, let us make sure we are not dealing with the
928 special tokens .true. and .false. which evaluate to 1 and 0. */
932 for (i = 0; boolean_values[i].name != NULL; i++)
934 if (strncmp (tokstart, boolean_values[i].name,
935 strlen (boolean_values[i].name)) == 0)
937 lexptr += strlen (boolean_values[i].name);
938 yylval.lval = boolean_values[i].value;
939 return BOOLEAN_LITERAL;
944 /* See if it is a special .foo. operator */
946 for (i = 0; dot_ops[i].operator != NULL; i++)
947 if (strncmp (tokstart, dot_ops[i].operator, strlen (dot_ops[i].operator)) == 0)
949 lexptr += strlen (dot_ops[i].operator);
950 yylval.opcode = dot_ops[i].opcode;
951 return dot_ops[i].token;
954 switch (c = *tokstart)
966 token = match_string_literal ();
977 if (paren_depth == 0)
984 if (comma_terminates && paren_depth == 0)
990 /* Might be a floating point number. */
991 if (lexptr[1] < '0' || lexptr[1] > '9')
992 goto symbol; /* Nope, must be a symbol. */
993 /* FALL THRU into number case. */
1006 /* It's a number. */
1007 int got_dot = 0, got_e = 0, got_d = 0, toktype;
1009 int hex = input_radix > 10;
1011 if (c == '0' && (p[1] == 'x' || p[1] == 'X'))
1016 else if (c == '0' && (p[1]=='t' || p[1]=='T' || p[1]=='d' || p[1]=='D'))
1024 if (!hex && !got_e && (*p == 'e' || *p == 'E'))
1025 got_dot = got_e = 1;
1026 else if (!hex && !got_d && (*p == 'd' || *p == 'D'))
1027 got_dot = got_d = 1;
1028 else if (!hex && !got_dot && *p == '.')
1030 else if (((got_e && (p[-1] == 'e' || p[-1] == 'E'))
1031 || (got_d && (p[-1] == 'd' || p[-1] == 'D')))
1032 && (*p == '-' || *p == '+'))
1033 /* This is the sign of the exponent, not the end of the
1036 /* We will take any letters or digits. parse_number will
1037 complain if past the radix, or if L or U are not final. */
1038 else if ((*p < '0' || *p > '9')
1039 && ((*p < 'a' || *p > 'z')
1040 && (*p < 'A' || *p > 'Z')))
1043 toktype = parse_number (tokstart, p - tokstart, got_dot|got_e|got_d,
1045 if (toktype == ERROR)
1047 char *err_copy = (char *) alloca (p - tokstart + 1);
1049 memcpy (err_copy, tokstart, p - tokstart);
1050 err_copy[p - tokstart] = 0;
1051 error ("Invalid number \"%s\".", err_copy);
1082 if (!(c == '_' || c == '$'
1083 || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')))
1084 /* We must have come across a bad character (e.g. ';'). */
1085 error ("Invalid character '%c' in expression.", c);
1088 for (c = tokstart[namelen];
1089 (c == '_' || c == '$' || (c >= '0' && c <= '9')
1090 || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'));
1091 c = tokstart[++namelen]);
1093 /* The token "if" terminates the expression and is NOT
1094 removed from the input stream. */
1096 if (namelen == 2 && tokstart[0] == 'i' && tokstart[1] == 'f')
1101 /* Catch specific keywords. */
1103 for (i = 0; f77_keywords[i].operator != NULL; i++)
1104 if (strncmp (tokstart, f77_keywords[i].operator,
1105 strlen(f77_keywords[i].operator)) == 0)
1107 /* lexptr += strlen(f77_keywords[i].operator); */
1108 yylval.opcode = f77_keywords[i].opcode;
1109 return f77_keywords[i].token;
1112 yylval.sval.ptr = tokstart;
1113 yylval.sval.length = namelen;
1115 if (*tokstart == '$')
1117 write_dollar_variable (yylval.sval);
1121 /* Use token-type TYPENAME for symbols that happen to be defined
1122 currently as names of types; NAME for other symbols.
1123 The caller is not constrained to care about the distinction. */
1125 char *tmp = copy_name (yylval.sval);
1127 int is_a_field_of_this = 0;
1130 sym = lookup_symbol (tmp, expression_context_block,
1132 current_language->la_language == language_cplus
1133 ? &is_a_field_of_this : NULL,
1135 if (sym && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
1137 yylval.tsym.type = SYMBOL_TYPE (sym);
1141 = language_lookup_primitive_type_by_name (current_language,
1142 current_gdbarch, tmp);
1143 if (yylval.tsym.type != NULL)
1146 /* Input names that aren't symbols but ARE valid hex numbers,
1147 when the input radix permits them, can be names or numbers
1148 depending on the parse. Note we support radixes > 16 here. */
1150 && ((tokstart[0] >= 'a' && tokstart[0] < 'a' + input_radix - 10)
1151 || (tokstart[0] >= 'A' && tokstart[0] < 'A' + input_radix - 10)))
1153 YYSTYPE newlval; /* Its value is ignored. */
1154 hextype = parse_number (tokstart, namelen, 0, &newlval);
1157 yylval.ssym.sym = sym;
1158 yylval.ssym.is_a_field_of_this = is_a_field_of_this;
1163 /* Any other kind of symbol */
1164 yylval.ssym.sym = sym;
1165 yylval.ssym.is_a_field_of_this = is_a_field_of_this;
1175 lexptr = prev_lexptr;
1177 error ("A %s in expression, near `%s'.", (msg ? msg : "error"), lexptr);