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 */
58 /* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc),
59 as well as gratuitiously global symbol names, so we can have multiple
60 yacc generated parsers in gdb. Note that these are only the variables
61 produced by yacc. If other parser generators (bison, byacc, etc) produce
62 additional global names that conflict at link time, then those parser
63 generators need to be fixed instead of adding those names to this list. */
65 #define yymaxdepth f_maxdepth
66 #define yyparse f_parse
68 #define yyerror f_error
71 #define yydebug f_debug
80 #define yyerrflag f_errflag
81 #define yynerrs f_nerrs
86 #define yystate f_state
92 #define yyreds f_reds /* With YYDEBUG defined */
93 #define yytoks f_toks /* With YYDEBUG defined */
94 #define yyname f_name /* With YYDEBUG defined */
95 #define yyrule f_rule /* With YYDEBUG defined */
98 #define yydefred f_yydefred
99 #define yydgoto f_yydgoto
100 #define yysindex f_yysindex
101 #define yyrindex f_yyrindex
102 #define yygindex f_yygindex
103 #define yytable f_yytable
104 #define yycheck f_yycheck
107 #define YYDEBUG 1 /* Default to yydebug support */
110 #define YYFPRINTF parser_fprintf
114 static int yylex (void);
116 void yyerror (char *);
118 static void growbuf_by_size (int);
120 static int match_string_literal (void);
124 /* Although the yacc "value" of an expression is not used,
125 since the result is stored in the structure being created,
126 other node types do have values. */
140 struct symtoken ssym;
143 enum exp_opcode opcode;
144 struct internalvar *ivar;
151 /* YYSTYPE gets defined by %union */
152 static int parse_number (char *, int, int, YYSTYPE *);
155 %type <voidval> exp type_exp start variable
156 %type <tval> type typebase
157 %type <tvec> nonempty_typelist
158 /* %type <bval> block */
160 /* Fancy type parsing. */
161 %type <voidval> func_mod direct_abs_decl abs_decl
164 %token <typed_val> INT
167 /* Both NAME and TYPENAME tokens represent symbols in the input,
168 and both convey their data as strings.
169 But a TYPENAME is a string that happens to be defined as a typedef
170 or builtin type name (such as int or char)
171 and a NAME is any other symbol.
172 Contexts where this distinction is not important can use the
173 nonterminal "name", which matches either NAME or TYPENAME. */
175 %token <sval> STRING_LITERAL
176 %token <lval> BOOLEAN_LITERAL
178 %token <tsym> TYPENAME
180 %type <ssym> name_not_typename
181 %type <tsym> typename
183 /* A NAME_OR_INT is a symbol which is not known in the symbol table,
184 but which would parse as a valid number in the current input radix.
185 E.g. "c" when input_radix==16. Depending on the parse, it will be
186 turned into a name or into a number. */
188 %token <ssym> NAME_OR_INT
193 /* Special type cases, put in to allow the parser to distinguish different
195 %token INT_KEYWORD INT_S2_KEYWORD LOGICAL_S1_KEYWORD LOGICAL_S2_KEYWORD
196 %token LOGICAL_KEYWORD REAL_KEYWORD REAL_S8_KEYWORD REAL_S16_KEYWORD
197 %token COMPLEX_S8_KEYWORD COMPLEX_S16_KEYWORD COMPLEX_S32_KEYWORD
198 %token BOOL_AND BOOL_OR BOOL_NOT
199 %token <lval> CHARACTER
201 %token <voidval> VARIABLE
203 %token <opcode> ASSIGN_MODIFY
207 %right '=' ASSIGN_MODIFY
216 %left LESSTHAN GREATERTHAN LEQ GEQ
232 { write_exp_elt_opcode(OP_TYPE);
233 write_exp_elt_type($1);
234 write_exp_elt_opcode(OP_TYPE); }
241 /* Expressions, not including the comma operator. */
242 exp : '*' exp %prec UNARY
243 { write_exp_elt_opcode (UNOP_IND); }
245 exp : '&' exp %prec UNARY
246 { write_exp_elt_opcode (UNOP_ADDR); }
248 exp : '-' exp %prec UNARY
249 { write_exp_elt_opcode (UNOP_NEG); }
252 exp : BOOL_NOT exp %prec UNARY
253 { write_exp_elt_opcode (UNOP_LOGICAL_NOT); }
256 exp : '~' exp %prec UNARY
257 { write_exp_elt_opcode (UNOP_COMPLEMENT); }
260 exp : SIZEOF exp %prec UNARY
261 { write_exp_elt_opcode (UNOP_SIZEOF); }
264 /* No more explicit array operators, we treat everything in F77 as
265 a function call. The disambiguation as to whether we are
266 doing a subscript operation or a function call is done
270 { start_arglist (); }
272 { write_exp_elt_opcode (OP_F77_UNDETERMINED_ARGLIST);
273 write_exp_elt_longcst ((LONGEST) end_arglist ());
274 write_exp_elt_opcode (OP_F77_UNDETERMINED_ARGLIST); }
287 arglist : arglist ',' exp %prec ABOVE_COMMA
291 substring: exp ':' exp %prec ABOVE_COMMA
296 complexnum: exp ',' exp
300 exp : '(' complexnum ')'
301 { write_exp_elt_opcode(OP_COMPLEX); }
304 exp : '(' type ')' exp %prec UNARY
305 { write_exp_elt_opcode (UNOP_CAST);
306 write_exp_elt_type ($2);
307 write_exp_elt_opcode (UNOP_CAST); }
310 /* Binary operators in order of decreasing precedence. */
313 { write_exp_elt_opcode (BINOP_REPEAT); }
317 { write_exp_elt_opcode (BINOP_MUL); }
321 { write_exp_elt_opcode (BINOP_DIV); }
325 { write_exp_elt_opcode (BINOP_REM); }
329 { write_exp_elt_opcode (BINOP_ADD); }
333 { write_exp_elt_opcode (BINOP_SUB); }
337 { write_exp_elt_opcode (BINOP_LSH); }
341 { write_exp_elt_opcode (BINOP_RSH); }
345 { write_exp_elt_opcode (BINOP_EQUAL); }
348 exp : exp NOTEQUAL exp
349 { write_exp_elt_opcode (BINOP_NOTEQUAL); }
353 { write_exp_elt_opcode (BINOP_LEQ); }
357 { write_exp_elt_opcode (BINOP_GEQ); }
360 exp : exp LESSTHAN exp
361 { write_exp_elt_opcode (BINOP_LESS); }
364 exp : exp GREATERTHAN exp
365 { write_exp_elt_opcode (BINOP_GTR); }
369 { write_exp_elt_opcode (BINOP_BITWISE_AND); }
373 { write_exp_elt_opcode (BINOP_BITWISE_XOR); }
377 { write_exp_elt_opcode (BINOP_BITWISE_IOR); }
380 exp : exp BOOL_AND exp
381 { write_exp_elt_opcode (BINOP_LOGICAL_AND); }
385 exp : exp BOOL_OR exp
386 { write_exp_elt_opcode (BINOP_LOGICAL_OR); }
390 { write_exp_elt_opcode (BINOP_ASSIGN); }
393 exp : exp ASSIGN_MODIFY exp
394 { write_exp_elt_opcode (BINOP_ASSIGN_MODIFY);
395 write_exp_elt_opcode ($2);
396 write_exp_elt_opcode (BINOP_ASSIGN_MODIFY); }
400 { write_exp_elt_opcode (OP_LONG);
401 write_exp_elt_type ($1.type);
402 write_exp_elt_longcst ((LONGEST)($1.val));
403 write_exp_elt_opcode (OP_LONG); }
408 parse_number ($1.stoken.ptr, $1.stoken.length, 0, &val);
409 write_exp_elt_opcode (OP_LONG);
410 write_exp_elt_type (val.typed_val.type);
411 write_exp_elt_longcst ((LONGEST)val.typed_val.val);
412 write_exp_elt_opcode (OP_LONG); }
416 { write_exp_elt_opcode (OP_DOUBLE);
417 write_exp_elt_type (builtin_type_f_real_s8);
418 write_exp_elt_dblcst ($1);
419 write_exp_elt_opcode (OP_DOUBLE); }
428 exp : SIZEOF '(' type ')' %prec UNARY
429 { write_exp_elt_opcode (OP_LONG);
430 write_exp_elt_type (builtin_type_f_integer);
432 write_exp_elt_longcst ((LONGEST) TYPE_LENGTH ($3));
433 write_exp_elt_opcode (OP_LONG); }
436 exp : BOOLEAN_LITERAL
437 { write_exp_elt_opcode (OP_BOOL);
438 write_exp_elt_longcst ((LONGEST) $1);
439 write_exp_elt_opcode (OP_BOOL);
445 write_exp_elt_opcode (OP_STRING);
446 write_exp_string ($1);
447 write_exp_elt_opcode (OP_STRING);
451 variable: name_not_typename
452 { struct symbol *sym = $1.sym;
456 if (symbol_read_needs_frame (sym))
458 if (innermost_block == 0 ||
459 contained_in (block_found,
461 innermost_block = block_found;
463 write_exp_elt_opcode (OP_VAR_VALUE);
464 /* We want to use the selected frame, not
465 another more inner frame which happens to
466 be in the same block. */
467 write_exp_elt_block (NULL);
468 write_exp_elt_sym (sym);
469 write_exp_elt_opcode (OP_VAR_VALUE);
474 struct minimal_symbol *msymbol;
475 register char *arg = copy_name ($1.stoken);
478 lookup_minimal_symbol (arg, NULL, NULL);
481 write_exp_msymbol (msymbol,
482 lookup_function_type (builtin_type_int),
485 else if (!have_full_symbols () && !have_partial_symbols ())
486 error ("No symbol table is loaded. Use the \"file\" command.");
488 error ("No symbol \"%s\" in current context.",
489 copy_name ($1.stoken));
501 /* This is where the interesting stuff happens. */
504 struct type *follow_type = $1;
505 struct type *range_type;
514 follow_type = lookup_pointer_type (follow_type);
517 follow_type = lookup_reference_type (follow_type);
520 array_size = pop_type_int ();
521 if (array_size != -1)
524 create_range_type ((struct type *) NULL,
525 builtin_type_f_integer, 0,
528 create_array_type ((struct type *) NULL,
529 follow_type, range_type);
532 follow_type = lookup_pointer_type (follow_type);
535 follow_type = lookup_function_type (follow_type);
543 { push_type (tp_pointer); $$ = 0; }
545 { push_type (tp_pointer); $$ = $2; }
547 { push_type (tp_reference); $$ = 0; }
549 { push_type (tp_reference); $$ = $2; }
553 direct_abs_decl: '(' abs_decl ')'
555 | direct_abs_decl func_mod
556 { push_type (tp_function); }
558 { push_type (tp_function); }
563 | '(' nonempty_typelist ')'
564 { free ((PTR)$2); $$ = 0; }
567 typebase /* Implements (approximately): (type-qualifier)* type-specifier */
571 { $$ = builtin_type_f_integer; }
573 { $$ = builtin_type_f_integer_s2; }
575 { $$ = builtin_type_f_character; }
577 { $$ = builtin_type_f_logical;}
579 { $$ = builtin_type_f_logical_s2;}
581 { $$ = builtin_type_f_logical_s1;}
583 { $$ = builtin_type_f_real;}
585 { $$ = builtin_type_f_real_s8;}
587 { $$ = builtin_type_f_real_s16;}
589 { $$ = builtin_type_f_complex_s8;}
590 | COMPLEX_S16_KEYWORD
591 { $$ = builtin_type_f_complex_s16;}
592 | COMPLEX_S32_KEYWORD
593 { $$ = builtin_type_f_complex_s32;}
601 { $$ = (struct type **) malloc (sizeof (struct type *) * 2);
602 $<ivec>$[0] = 1; /* Number of types in vector */
605 | nonempty_typelist ',' type
606 { int len = sizeof (struct type *) * (++($<ivec>1[0]) + 1);
607 $$ = (struct type **) realloc ((char *) $1, len);
608 $$[$<ivec>$[0]] = $3;
620 name_not_typename : NAME
621 /* These would be useful if name_not_typename was useful, but it is just
622 a fake for "variable", so these cause reduce/reduce conflicts because
623 the parser can't tell whether NAME_OR_INT is a name_not_typename (=variable,
624 =exp) or just an exp. If name_not_typename was ever used in an lvalue
625 context where only a name could occur, this might be useful.
632 /* Take care of parsing a number (anything that starts with a digit).
633 Set yylval and return the token type; update lexptr.
634 LEN is the number of characters in it. */
636 /*** Needs some error checking for the float case ***/
639 parse_number (p, len, parsed_float, putithere)
645 register LONGEST n = 0;
646 register LONGEST prevn = 0;
648 register int base = input_radix;
652 struct type *signed_type;
653 struct type *unsigned_type;
657 /* It's a float since it contains a point or an exponent. */
658 /* [dD] is not understood as an exponent by atof, change it to 'e'. */
662 for (tmp2 = tmp; *tmp2; ++tmp2)
663 if (*tmp2 == 'd' || *tmp2 == 'D')
665 putithere->dval = atof (tmp);
670 /* Handle base-switching prefixes 0x, 0t, 0d, 0 */
706 if (len == 0 && c == 'l')
708 else if (len == 0 && c == 'u')
713 if (c >= '0' && c <= '9')
715 else if (c >= 'a' && c <= 'f')
718 return ERROR; /* Char not a digit */
720 return ERROR; /* Invalid digit in this base */
724 /* Portably test for overflow (only works for nonzero values, so make
725 a second check for zero). */
726 if ((prevn >= n) && n != 0)
727 unsigned_p=1; /* Try something unsigned */
728 /* If range checking enabled, portably test for unsigned overflow. */
729 if (RANGE_CHECK && n != 0)
731 if ((unsigned_p && (unsigned)prevn >= (unsigned)n))
732 range_error("Overflow on numeric constant.");
737 /* If the number is too big to be an int, or it's got an l suffix
738 then it's a long. Work out if this has to be a long by
739 shifting right and and seeing if anything remains, and the
740 target int size is different to the target long size.
742 In the expression below, we could have tested
743 (n >> TARGET_INT_BIT)
744 to see if it was zero,
745 but too many compilers warn about that, when ints and longs
746 are the same size. So we shift it twice, with fewer bits
747 each time, for the same result. */
749 if ((TARGET_INT_BIT != TARGET_LONG_BIT
750 && ((n >> 2) >> (TARGET_INT_BIT-2))) /* Avoid shift warning */
753 high_bit = ((ULONGEST)1) << (TARGET_LONG_BIT-1);
754 unsigned_type = builtin_type_unsigned_long;
755 signed_type = builtin_type_long;
759 high_bit = ((ULONGEST)1) << (TARGET_INT_BIT-1);
760 unsigned_type = builtin_type_unsigned_int;
761 signed_type = builtin_type_int;
764 putithere->typed_val.val = n;
766 /* If the high bit of the worked out type is set then this number
767 has to be unsigned. */
769 if (unsigned_p || (n & high_bit))
770 putithere->typed_val.type = unsigned_type;
772 putithere->typed_val.type = signed_type;
781 enum exp_opcode opcode;
784 static const struct token dot_ops[] =
786 { ".and.", BOOL_AND, BINOP_END },
787 { ".AND.", BOOL_AND, BINOP_END },
788 { ".or.", BOOL_OR, BINOP_END },
789 { ".OR.", BOOL_OR, BINOP_END },
790 { ".not.", BOOL_NOT, BINOP_END },
791 { ".NOT.", BOOL_NOT, BINOP_END },
792 { ".eq.", EQUAL, BINOP_END },
793 { ".EQ.", EQUAL, BINOP_END },
794 { ".eqv.", EQUAL, BINOP_END },
795 { ".NEQV.", NOTEQUAL, BINOP_END },
796 { ".neqv.", NOTEQUAL, BINOP_END },
797 { ".EQV.", EQUAL, BINOP_END },
798 { ".ne.", NOTEQUAL, BINOP_END },
799 { ".NE.", NOTEQUAL, BINOP_END },
800 { ".le.", LEQ, BINOP_END },
801 { ".LE.", LEQ, BINOP_END },
802 { ".ge.", GEQ, BINOP_END },
803 { ".GE.", GEQ, BINOP_END },
804 { ".gt.", GREATERTHAN, BINOP_END },
805 { ".GT.", GREATERTHAN, BINOP_END },
806 { ".lt.", LESSTHAN, BINOP_END },
807 { ".LT.", LESSTHAN, BINOP_END },
811 struct f77_boolean_val
817 static const struct f77_boolean_val boolean_values[] =
826 static const struct token f77_keywords[] =
828 { "complex_16", COMPLEX_S16_KEYWORD, BINOP_END },
829 { "complex_32", COMPLEX_S32_KEYWORD, BINOP_END },
830 { "character", CHARACTER, BINOP_END },
831 { "integer_2", INT_S2_KEYWORD, BINOP_END },
832 { "logical_1", LOGICAL_S1_KEYWORD, BINOP_END },
833 { "logical_2", LOGICAL_S2_KEYWORD, BINOP_END },
834 { "complex_8", COMPLEX_S8_KEYWORD, BINOP_END },
835 { "integer", INT_KEYWORD, BINOP_END },
836 { "logical", LOGICAL_KEYWORD, BINOP_END },
837 { "real_16", REAL_S16_KEYWORD, BINOP_END },
838 { "complex", COMPLEX_S8_KEYWORD, BINOP_END },
839 { "sizeof", SIZEOF, BINOP_END },
840 { "real_8", REAL_S8_KEYWORD, BINOP_END },
841 { "real", REAL_KEYWORD, BINOP_END },
845 /* Implementation of a dynamically expandable buffer for processing input
846 characters acquired through lexptr and building a value to return in
847 yylval. Ripped off from ch-exp.y */
849 static char *tempbuf; /* Current buffer contents */
850 static int tempbufsize; /* Size of allocated buffer */
851 static int tempbufindex; /* Current index into buffer */
853 #define GROWBY_MIN_SIZE 64 /* Minimum amount to grow buffer by */
855 #define CHECKBUF(size) \
857 if (tempbufindex + (size) >= tempbufsize) \
859 growbuf_by_size (size); \
864 /* Grow the static temp buffer if necessary, including allocating the first one
868 growbuf_by_size (count)
873 growby = max (count, GROWBY_MIN_SIZE);
874 tempbufsize += growby;
876 tempbuf = (char *) malloc (tempbufsize);
878 tempbuf = (char *) realloc (tempbuf, tempbufsize);
881 /* Blatantly ripped off from ch-exp.y. This routine recognizes F77
884 Recognize a string literal. A string literal is a nonzero sequence
885 of characters enclosed in matching single quotes, except that
886 a single character inside single quotes is a character literal, which
887 we reject as a string literal. To embed the terminator character inside
888 a string, it is simply doubled (I.E. 'this''is''one''string') */
891 match_string_literal ()
893 char *tokptr = lexptr;
895 for (tempbufindex = 0, tokptr++; *tokptr != '\0'; tokptr++)
898 if (*tokptr == *lexptr)
900 if (*(tokptr + 1) == *lexptr)
905 tempbuf[tempbufindex++] = *tokptr;
907 if (*tokptr == '\0' /* no terminator */
908 || tempbufindex == 0) /* no string */
912 tempbuf[tempbufindex] = '\0';
913 yylval.sval.ptr = tempbuf;
914 yylval.sval.length = tempbufindex;
916 return STRING_LITERAL;
920 /* Read one token, getting characters through lexptr. */
927 unsigned int i,token;
932 prev_lexptr = lexptr;
936 /* First of all, let us make sure we are not dealing with the
937 special tokens .true. and .false. which evaluate to 1 and 0. */
941 for (i = 0; boolean_values[i].name != NULL; i++)
943 if STREQN (tokstart, boolean_values[i].name,
944 strlen (boolean_values[i].name))
946 lexptr += strlen (boolean_values[i].name);
947 yylval.lval = boolean_values[i].value;
948 return BOOLEAN_LITERAL;
953 /* See if it is a special .foo. operator */
955 for (i = 0; dot_ops[i].operator != NULL; i++)
956 if (STREQN (tokstart, dot_ops[i].operator, strlen (dot_ops[i].operator)))
958 lexptr += strlen (dot_ops[i].operator);
959 yylval.opcode = dot_ops[i].opcode;
960 return dot_ops[i].token;
963 switch (c = *tokstart)
975 token = match_string_literal ();
986 if (paren_depth == 0)
993 if (comma_terminates && paren_depth == 0)
999 /* Might be a floating point number. */
1000 if (lexptr[1] < '0' || lexptr[1] > '9')
1001 goto symbol; /* Nope, must be a symbol. */
1002 /* FALL THRU into number case. */
1015 /* It's a number. */
1016 int got_dot = 0, got_e = 0, got_d = 0, toktype;
1017 register char *p = tokstart;
1018 int hex = input_radix > 10;
1020 if (c == '0' && (p[1] == 'x' || p[1] == 'X'))
1025 else if (c == '0' && (p[1]=='t' || p[1]=='T' || p[1]=='d' || p[1]=='D'))
1033 if (!hex && !got_e && (*p == 'e' || *p == 'E'))
1034 got_dot = got_e = 1;
1035 else if (!hex && !got_d && (*p == 'd' || *p == 'D'))
1036 got_dot = got_d = 1;
1037 else if (!hex && !got_dot && *p == '.')
1039 else if (((got_e && (p[-1] == 'e' || p[-1] == 'E'))
1040 || (got_d && (p[-1] == 'd' || p[-1] == 'D')))
1041 && (*p == '-' || *p == '+'))
1042 /* This is the sign of the exponent, not the end of the
1045 /* We will take any letters or digits. parse_number will
1046 complain if past the radix, or if L or U are not final. */
1047 else if ((*p < '0' || *p > '9')
1048 && ((*p < 'a' || *p > 'z')
1049 && (*p < 'A' || *p > 'Z')))
1052 toktype = parse_number (tokstart, p - tokstart, got_dot|got_e|got_d,
1054 if (toktype == ERROR)
1056 char *err_copy = (char *) alloca (p - tokstart + 1);
1058 memcpy (err_copy, tokstart, p - tokstart);
1059 err_copy[p - tokstart] = 0;
1060 error ("Invalid number \"%s\".", err_copy);
1091 if (!(c == '_' || c == '$'
1092 || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')))
1093 /* We must have come across a bad character (e.g. ';'). */
1094 error ("Invalid character '%c' in expression.", c);
1097 for (c = tokstart[namelen];
1098 (c == '_' || c == '$' || (c >= '0' && c <= '9')
1099 || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'));
1100 c = tokstart[++namelen]);
1102 /* The token "if" terminates the expression and is NOT
1103 removed from the input stream. */
1105 if (namelen == 2 && tokstart[0] == 'i' && tokstart[1] == 'f')
1110 /* Catch specific keywords. */
1112 for (i = 0; f77_keywords[i].operator != NULL; i++)
1113 if (STREQN(tokstart, f77_keywords[i].operator,
1114 strlen(f77_keywords[i].operator)))
1116 /* lexptr += strlen(f77_keywords[i].operator); */
1117 yylval.opcode = f77_keywords[i].opcode;
1118 return f77_keywords[i].token;
1121 yylval.sval.ptr = tokstart;
1122 yylval.sval.length = namelen;
1124 if (*tokstart == '$')
1126 write_dollar_variable (yylval.sval);
1130 /* Use token-type TYPENAME for symbols that happen to be defined
1131 currently as names of types; NAME for other symbols.
1132 The caller is not constrained to care about the distinction. */
1134 char *tmp = copy_name (yylval.sval);
1136 int is_a_field_of_this = 0;
1139 sym = lookup_symbol (tmp, expression_context_block,
1141 current_language->la_language == language_cplus
1142 ? &is_a_field_of_this : NULL,
1144 if (sym && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
1146 yylval.tsym.type = SYMBOL_TYPE (sym);
1149 if ((yylval.tsym.type = lookup_primitive_typename (tmp)) != 0)
1152 /* Input names that aren't symbols but ARE valid hex numbers,
1153 when the input radix permits them, can be names or numbers
1154 depending on the parse. Note we support radixes > 16 here. */
1156 && ((tokstart[0] >= 'a' && tokstart[0] < 'a' + input_radix - 10)
1157 || (tokstart[0] >= 'A' && tokstart[0] < 'A' + input_radix - 10)))
1159 YYSTYPE newlval; /* Its value is ignored. */
1160 hextype = parse_number (tokstart, namelen, 0, &newlval);
1163 yylval.ssym.sym = sym;
1164 yylval.ssym.is_a_field_of_this = is_a_field_of_this;
1169 /* Any other kind of symbol */
1170 yylval.ssym.sym = sym;
1171 yylval.ssym.is_a_field_of_this = is_a_field_of_this;
1181 lexptr = prev_lexptr;
1183 error ("A %s in expression, near `%s'.", (msg ? msg : "error"), lexptr);