1 /* YACC parser for Fortran expressions, for GDB.
2 Copyright (C) 1986, 1989, 1990, 1991, 1993, 1994, 1995, 1996, 2000, 2001,
3 2002, 2003, 2004, 2005 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., 51 Franklin Street, Fifth Floor,
23 Boston, MA 02110-1301, USA. */
25 /* This was blantantly ripped off the C expression parser, please
26 be aware of that as you look at its basic structure -FMB */
28 /* Parse a F77 expression from text in a string,
29 and return the result as a struct expression pointer.
30 That structure contains arithmetic operations in reverse polish,
31 with constants represented by operations that are followed by special data.
32 See expression.h for the details of the format.
33 What is important here is that it can be built up sequentially
34 during the process of parsing; the lower levels of the tree always
35 come first in the result.
37 Note that malloc's and realloc's in this file are transformed to
38 xmalloc and xrealloc respectively by the same sed command in the
39 makefile that remaps any other malloc/realloc inserted by the parser
40 generator. Doing this with #defines and trying to control the interaction
41 with include files (<malloc.h> and <stdlib.h> for example) just became
42 too messy, particularly when such includes can be inserted at random
43 times by the parser generator. */
48 #include "gdb_string.h"
49 #include "expression.h"
51 #include "parser-defs.h"
54 #include "bfd.h" /* Required by objfiles.h. */
55 #include "symfile.h" /* Required by objfiles.h. */
56 #include "objfiles.h" /* For have_full_symbols and have_partial_symbols */
60 /* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc),
61 as well as gratuitiously global symbol names, so we can have multiple
62 yacc generated parsers in gdb. Note that these are only the variables
63 produced by yacc. If other parser generators (bison, byacc, etc) produce
64 additional global names that conflict at link time, then those parser
65 generators need to be fixed instead of adding those names to this list. */
67 #define yymaxdepth f_maxdepth
68 #define yyparse f_parse
70 #define yyerror f_error
73 #define yydebug f_debug
82 #define yyerrflag f_errflag
83 #define yynerrs f_nerrs
88 #define yystate f_state
94 #define yyreds f_reds /* With YYDEBUG defined */
95 #define yytoks f_toks /* With YYDEBUG defined */
96 #define yyname f_name /* With YYDEBUG defined */
97 #define yyrule f_rule /* With YYDEBUG defined */
100 #define yydefred f_yydefred
101 #define yydgoto f_yydgoto
102 #define yysindex f_yysindex
103 #define yyrindex f_yyrindex
104 #define yygindex f_yygindex
105 #define yytable f_yytable
106 #define yycheck f_yycheck
109 #define YYDEBUG 1 /* Default to yydebug support */
112 #define YYFPRINTF parser_fprintf
116 static int yylex (void);
118 void yyerror (char *);
120 static void growbuf_by_size (int);
122 static int match_string_literal (void);
126 /* Although the yacc "value" of an expression is not used,
127 since the result is stored in the structure being created,
128 other node types do have values. */
142 struct symtoken ssym;
145 enum exp_opcode opcode;
146 struct internalvar *ivar;
153 /* YYSTYPE gets defined by %union */
154 static int parse_number (char *, int, int, YYSTYPE *);
157 %type <voidval> exp type_exp start variable
158 %type <tval> type typebase
159 %type <tvec> nonempty_typelist
160 /* %type <bval> block */
162 /* Fancy type parsing. */
163 %type <voidval> func_mod direct_abs_decl abs_decl
166 %token <typed_val> INT
169 /* Both NAME and TYPENAME tokens represent symbols in the input,
170 and both convey their data as strings.
171 But a TYPENAME is a string that happens to be defined as a typedef
172 or builtin type name (such as int or char)
173 and a NAME is any other symbol.
174 Contexts where this distinction is not important can use the
175 nonterminal "name", which matches either NAME or TYPENAME. */
177 %token <sval> STRING_LITERAL
178 %token <lval> BOOLEAN_LITERAL
180 %token <tsym> TYPENAME
181 %type <ssym> name_not_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
233 { write_exp_elt_opcode(OP_TYPE);
234 write_exp_elt_type($1);
235 write_exp_elt_opcode(OP_TYPE); }
242 /* Expressions, not including the comma operator. */
243 exp : '*' exp %prec UNARY
244 { write_exp_elt_opcode (UNOP_IND); }
247 exp : '&' exp %prec UNARY
248 { write_exp_elt_opcode (UNOP_ADDR); }
251 exp : '-' exp %prec UNARY
252 { write_exp_elt_opcode (UNOP_NEG); }
255 exp : BOOL_NOT exp %prec UNARY
256 { write_exp_elt_opcode (UNOP_LOGICAL_NOT); }
259 exp : '~' exp %prec UNARY
260 { write_exp_elt_opcode (UNOP_COMPLEMENT); }
263 exp : SIZEOF exp %prec UNARY
264 { write_exp_elt_opcode (UNOP_SIZEOF); }
267 /* No more explicit array operators, we treat everything in F77 as
268 a function call. The disambiguation as to whether we are
269 doing a subscript operation or a function call is done
273 { start_arglist (); }
275 { write_exp_elt_opcode (OP_F77_UNDETERMINED_ARGLIST);
276 write_exp_elt_longcst ((LONGEST) end_arglist ());
277 write_exp_elt_opcode (OP_F77_UNDETERMINED_ARGLIST); }
291 arglist : arglist ',' exp %prec ABOVE_COMMA
295 /* There are four sorts of subrange types in F90. */
297 subrange: exp ':' exp %prec ABOVE_COMMA
298 { write_exp_elt_opcode (OP_F90_RANGE);
299 write_exp_elt_longcst (NONE_BOUND_DEFAULT);
300 write_exp_elt_opcode (OP_F90_RANGE); }
303 subrange: exp ':' %prec ABOVE_COMMA
304 { write_exp_elt_opcode (OP_F90_RANGE);
305 write_exp_elt_longcst (HIGH_BOUND_DEFAULT);
306 write_exp_elt_opcode (OP_F90_RANGE); }
309 subrange: ':' exp %prec ABOVE_COMMA
310 { write_exp_elt_opcode (OP_F90_RANGE);
311 write_exp_elt_longcst (LOW_BOUND_DEFAULT);
312 write_exp_elt_opcode (OP_F90_RANGE); }
315 subrange: ':' %prec ABOVE_COMMA
316 { write_exp_elt_opcode (OP_F90_RANGE);
317 write_exp_elt_longcst (BOTH_BOUND_DEFAULT);
318 write_exp_elt_opcode (OP_F90_RANGE); }
321 complexnum: exp ',' exp
325 exp : '(' complexnum ')'
326 { write_exp_elt_opcode(OP_COMPLEX); }
329 exp : '(' type ')' exp %prec UNARY
330 { write_exp_elt_opcode (UNOP_CAST);
331 write_exp_elt_type ($2);
332 write_exp_elt_opcode (UNOP_CAST); }
335 /* Binary operators in order of decreasing precedence. */
338 { write_exp_elt_opcode (BINOP_REPEAT); }
341 exp : exp STARSTAR exp
342 { write_exp_elt_opcode (BINOP_EXP); }
346 { write_exp_elt_opcode (BINOP_MUL); }
350 { write_exp_elt_opcode (BINOP_DIV); }
354 { write_exp_elt_opcode (BINOP_REM); }
358 { write_exp_elt_opcode (BINOP_ADD); }
362 { write_exp_elt_opcode (BINOP_SUB); }
366 { write_exp_elt_opcode (BINOP_LSH); }
370 { write_exp_elt_opcode (BINOP_RSH); }
374 { write_exp_elt_opcode (BINOP_EQUAL); }
377 exp : exp NOTEQUAL exp
378 { write_exp_elt_opcode (BINOP_NOTEQUAL); }
382 { write_exp_elt_opcode (BINOP_LEQ); }
386 { write_exp_elt_opcode (BINOP_GEQ); }
389 exp : exp LESSTHAN exp
390 { write_exp_elt_opcode (BINOP_LESS); }
393 exp : exp GREATERTHAN exp
394 { write_exp_elt_opcode (BINOP_GTR); }
398 { write_exp_elt_opcode (BINOP_BITWISE_AND); }
402 { write_exp_elt_opcode (BINOP_BITWISE_XOR); }
406 { write_exp_elt_opcode (BINOP_BITWISE_IOR); }
409 exp : exp BOOL_AND exp
410 { write_exp_elt_opcode (BINOP_LOGICAL_AND); }
414 exp : exp BOOL_OR exp
415 { write_exp_elt_opcode (BINOP_LOGICAL_OR); }
419 { write_exp_elt_opcode (BINOP_ASSIGN); }
422 exp : exp ASSIGN_MODIFY exp
423 { write_exp_elt_opcode (BINOP_ASSIGN_MODIFY);
424 write_exp_elt_opcode ($2);
425 write_exp_elt_opcode (BINOP_ASSIGN_MODIFY); }
429 { write_exp_elt_opcode (OP_LONG);
430 write_exp_elt_type ($1.type);
431 write_exp_elt_longcst ((LONGEST)($1.val));
432 write_exp_elt_opcode (OP_LONG); }
437 parse_number ($1.stoken.ptr, $1.stoken.length, 0, &val);
438 write_exp_elt_opcode (OP_LONG);
439 write_exp_elt_type (val.typed_val.type);
440 write_exp_elt_longcst ((LONGEST)val.typed_val.val);
441 write_exp_elt_opcode (OP_LONG); }
445 { write_exp_elt_opcode (OP_DOUBLE);
446 write_exp_elt_type (builtin_type_f_real_s8);
447 write_exp_elt_dblcst ($1);
448 write_exp_elt_opcode (OP_DOUBLE); }
457 exp : SIZEOF '(' type ')' %prec UNARY
458 { write_exp_elt_opcode (OP_LONG);
459 write_exp_elt_type (builtin_type_f_integer);
461 write_exp_elt_longcst ((LONGEST) TYPE_LENGTH ($3));
462 write_exp_elt_opcode (OP_LONG); }
465 exp : BOOLEAN_LITERAL
466 { write_exp_elt_opcode (OP_BOOL);
467 write_exp_elt_longcst ((LONGEST) $1);
468 write_exp_elt_opcode (OP_BOOL);
474 write_exp_elt_opcode (OP_STRING);
475 write_exp_string ($1);
476 write_exp_elt_opcode (OP_STRING);
480 variable: name_not_typename
481 { struct symbol *sym = $1.sym;
485 if (symbol_read_needs_frame (sym))
487 if (innermost_block == 0 ||
488 contained_in (block_found,
490 innermost_block = block_found;
492 write_exp_elt_opcode (OP_VAR_VALUE);
493 /* We want to use the selected frame, not
494 another more inner frame which happens to
495 be in the same block. */
496 write_exp_elt_block (NULL);
497 write_exp_elt_sym (sym);
498 write_exp_elt_opcode (OP_VAR_VALUE);
503 struct minimal_symbol *msymbol;
504 char *arg = copy_name ($1.stoken);
507 lookup_minimal_symbol (arg, NULL, NULL);
510 write_exp_msymbol (msymbol,
511 lookup_function_type (builtin_type_int),
514 else if (!have_full_symbols () && !have_partial_symbols ())
515 error ("No symbol table is loaded. Use the \"file\" command.");
517 error ("No symbol \"%s\" in current context.",
518 copy_name ($1.stoken));
530 /* This is where the interesting stuff happens. */
533 struct type *follow_type = $1;
534 struct type *range_type;
543 follow_type = lookup_pointer_type (follow_type);
546 follow_type = lookup_reference_type (follow_type);
549 array_size = pop_type_int ();
550 if (array_size != -1)
553 create_range_type ((struct type *) NULL,
554 builtin_type_f_integer, 0,
557 create_array_type ((struct type *) NULL,
558 follow_type, range_type);
561 follow_type = lookup_pointer_type (follow_type);
564 follow_type = lookup_function_type (follow_type);
572 { push_type (tp_pointer); $$ = 0; }
574 { push_type (tp_pointer); $$ = $2; }
576 { push_type (tp_reference); $$ = 0; }
578 { push_type (tp_reference); $$ = $2; }
582 direct_abs_decl: '(' abs_decl ')'
584 | direct_abs_decl func_mod
585 { push_type (tp_function); }
587 { push_type (tp_function); }
592 | '(' nonempty_typelist ')'
593 { free ($2); $$ = 0; }
596 typebase /* Implements (approximately): (type-qualifier)* type-specifier */
600 { $$ = builtin_type_f_integer; }
602 { $$ = builtin_type_f_integer_s2; }
604 { $$ = builtin_type_f_character; }
606 { $$ = builtin_type_f_logical;}
608 { $$ = builtin_type_f_logical_s2;}
610 { $$ = builtin_type_f_logical_s1;}
612 { $$ = builtin_type_f_real;}
614 { $$ = builtin_type_f_real_s8;}
616 { $$ = builtin_type_f_real_s16;}
618 { $$ = builtin_type_f_complex_s8;}
619 | COMPLEX_S16_KEYWORD
620 { $$ = builtin_type_f_complex_s16;}
621 | COMPLEX_S32_KEYWORD
622 { $$ = builtin_type_f_complex_s32;}
627 { $$ = (struct type **) malloc (sizeof (struct type *) * 2);
628 $<ivec>$[0] = 1; /* Number of types in vector */
631 | nonempty_typelist ',' type
632 { int len = sizeof (struct type *) * (++($<ivec>1[0]) + 1);
633 $$ = (struct type **) realloc ((char *) $1, len);
634 $$[$<ivec>$[0]] = $3;
638 name_not_typename : NAME
639 /* These would be useful if name_not_typename was useful, but it is just
640 a fake for "variable", so these cause reduce/reduce conflicts because
641 the parser can't tell whether NAME_OR_INT is a name_not_typename (=variable,
642 =exp) or just an exp. If name_not_typename was ever used in an lvalue
643 context where only a name could occur, this might be useful.
650 /* Take care of parsing a number (anything that starts with a digit).
651 Set yylval and return the token type; update lexptr.
652 LEN is the number of characters in it. */
654 /*** Needs some error checking for the float case ***/
657 parse_number (p, len, parsed_float, putithere)
666 int base = input_radix;
670 struct type *signed_type;
671 struct type *unsigned_type;
675 /* It's a float since it contains a point or an exponent. */
676 /* [dD] is not understood as an exponent by atof, change it to 'e'. */
680 for (tmp2 = tmp; *tmp2; ++tmp2)
681 if (*tmp2 == 'd' || *tmp2 == 'D')
683 putithere->dval = atof (tmp);
688 /* Handle base-switching prefixes 0x, 0t, 0d, 0 */
724 if (len == 0 && c == 'l')
726 else if (len == 0 && c == 'u')
731 if (c >= '0' && c <= '9')
733 else if (c >= 'a' && c <= 'f')
736 return ERROR; /* Char not a digit */
738 return ERROR; /* Invalid digit in this base */
742 /* Portably test for overflow (only works for nonzero values, so make
743 a second check for zero). */
744 if ((prevn >= n) && n != 0)
745 unsigned_p=1; /* Try something unsigned */
746 /* If range checking enabled, portably test for unsigned overflow. */
747 if (RANGE_CHECK && n != 0)
749 if ((unsigned_p && (unsigned)prevn >= (unsigned)n))
750 range_error("Overflow on numeric constant.");
755 /* If the number is too big to be an int, or it's got an l suffix
756 then it's a long. Work out if this has to be a long by
757 shifting right and and seeing if anything remains, and the
758 target int size is different to the target long size.
760 In the expression below, we could have tested
761 (n >> TARGET_INT_BIT)
762 to see if it was zero,
763 but too many compilers warn about that, when ints and longs
764 are the same size. So we shift it twice, with fewer bits
765 each time, for the same result. */
767 if ((TARGET_INT_BIT != TARGET_LONG_BIT
768 && ((n >> 2) >> (TARGET_INT_BIT-2))) /* Avoid shift warning */
771 high_bit = ((ULONGEST)1) << (TARGET_LONG_BIT-1);
772 unsigned_type = builtin_type_unsigned_long;
773 signed_type = builtin_type_long;
777 high_bit = ((ULONGEST)1) << (TARGET_INT_BIT-1);
778 unsigned_type = builtin_type_unsigned_int;
779 signed_type = builtin_type_int;
782 putithere->typed_val.val = n;
784 /* If the high bit of the worked out type is set then this number
785 has to be unsigned. */
787 if (unsigned_p || (n & high_bit))
788 putithere->typed_val.type = unsigned_type;
790 putithere->typed_val.type = signed_type;
799 enum exp_opcode opcode;
802 static const struct token dot_ops[] =
804 { ".and.", BOOL_AND, BINOP_END },
805 { ".AND.", BOOL_AND, BINOP_END },
806 { ".or.", BOOL_OR, BINOP_END },
807 { ".OR.", BOOL_OR, BINOP_END },
808 { ".not.", BOOL_NOT, BINOP_END },
809 { ".NOT.", BOOL_NOT, BINOP_END },
810 { ".eq.", EQUAL, BINOP_END },
811 { ".EQ.", EQUAL, BINOP_END },
812 { ".eqv.", EQUAL, BINOP_END },
813 { ".NEQV.", NOTEQUAL, BINOP_END },
814 { ".neqv.", NOTEQUAL, BINOP_END },
815 { ".EQV.", EQUAL, BINOP_END },
816 { ".ne.", NOTEQUAL, BINOP_END },
817 { ".NE.", NOTEQUAL, BINOP_END },
818 { ".le.", LEQ, BINOP_END },
819 { ".LE.", LEQ, BINOP_END },
820 { ".ge.", GEQ, BINOP_END },
821 { ".GE.", GEQ, BINOP_END },
822 { ".gt.", GREATERTHAN, BINOP_END },
823 { ".GT.", GREATERTHAN, BINOP_END },
824 { ".lt.", LESSTHAN, BINOP_END },
825 { ".LT.", LESSTHAN, BINOP_END },
829 struct f77_boolean_val
835 static const struct f77_boolean_val boolean_values[] =
844 static const struct token f77_keywords[] =
846 { "complex_16", COMPLEX_S16_KEYWORD, BINOP_END },
847 { "complex_32", COMPLEX_S32_KEYWORD, BINOP_END },
848 { "character", CHARACTER, BINOP_END },
849 { "integer_2", INT_S2_KEYWORD, BINOP_END },
850 { "logical_1", LOGICAL_S1_KEYWORD, BINOP_END },
851 { "logical_2", LOGICAL_S2_KEYWORD, BINOP_END },
852 { "complex_8", COMPLEX_S8_KEYWORD, BINOP_END },
853 { "integer", INT_KEYWORD, BINOP_END },
854 { "logical", LOGICAL_KEYWORD, BINOP_END },
855 { "real_16", REAL_S16_KEYWORD, BINOP_END },
856 { "complex", COMPLEX_S8_KEYWORD, BINOP_END },
857 { "sizeof", SIZEOF, BINOP_END },
858 { "real_8", REAL_S8_KEYWORD, BINOP_END },
859 { "real", REAL_KEYWORD, BINOP_END },
863 /* Implementation of a dynamically expandable buffer for processing input
864 characters acquired through lexptr and building a value to return in
865 yylval. Ripped off from ch-exp.y */
867 static char *tempbuf; /* Current buffer contents */
868 static int tempbufsize; /* Size of allocated buffer */
869 static int tempbufindex; /* Current index into buffer */
871 #define GROWBY_MIN_SIZE 64 /* Minimum amount to grow buffer by */
873 #define CHECKBUF(size) \
875 if (tempbufindex + (size) >= tempbufsize) \
877 growbuf_by_size (size); \
882 /* Grow the static temp buffer if necessary, including allocating the first one
886 growbuf_by_size (count)
891 growby = max (count, GROWBY_MIN_SIZE);
892 tempbufsize += growby;
894 tempbuf = (char *) malloc (tempbufsize);
896 tempbuf = (char *) realloc (tempbuf, tempbufsize);
899 /* Blatantly ripped off from ch-exp.y. This routine recognizes F77
902 Recognize a string literal. A string literal is a nonzero sequence
903 of characters enclosed in matching single quotes, except that
904 a single character inside single quotes is a character literal, which
905 we reject as a string literal. To embed the terminator character inside
906 a string, it is simply doubled (I.E. 'this''is''one''string') */
909 match_string_literal ()
911 char *tokptr = lexptr;
913 for (tempbufindex = 0, tokptr++; *tokptr != '\0'; tokptr++)
916 if (*tokptr == *lexptr)
918 if (*(tokptr + 1) == *lexptr)
923 tempbuf[tempbufindex++] = *tokptr;
925 if (*tokptr == '\0' /* no terminator */
926 || tempbufindex == 0) /* no string */
930 tempbuf[tempbufindex] = '\0';
931 yylval.sval.ptr = tempbuf;
932 yylval.sval.length = tempbufindex;
934 return STRING_LITERAL;
938 /* Read one token, getting characters through lexptr. */
945 unsigned int i,token;
950 prev_lexptr = lexptr;
954 /* First of all, let us make sure we are not dealing with the
955 special tokens .true. and .false. which evaluate to 1 and 0. */
959 for (i = 0; boolean_values[i].name != NULL; i++)
961 if (strncmp (tokstart, boolean_values[i].name,
962 strlen (boolean_values[i].name)) == 0)
964 lexptr += strlen (boolean_values[i].name);
965 yylval.lval = boolean_values[i].value;
966 return BOOLEAN_LITERAL;
971 /* See if it is a special .foo. operator. */
973 for (i = 0; dot_ops[i].operator != NULL; i++)
974 if (strncmp (tokstart, dot_ops[i].operator, strlen (dot_ops[i].operator)) == 0)
976 lexptr += strlen (dot_ops[i].operator);
977 yylval.opcode = dot_ops[i].opcode;
978 return dot_ops[i].token;
981 /* See if it is an exponentiation operator. */
983 if (strncmp (tokstart, "**", 2) == 0)
986 yylval.opcode = BINOP_EXP;
990 switch (c = *tokstart)
1002 token = match_string_literal ();
1013 if (paren_depth == 0)
1020 if (comma_terminates && paren_depth == 0)
1026 /* Might be a floating point number. */
1027 if (lexptr[1] < '0' || lexptr[1] > '9')
1028 goto symbol; /* Nope, must be a symbol. */
1029 /* FALL THRU into number case. */
1042 /* It's a number. */
1043 int got_dot = 0, got_e = 0, got_d = 0, toktype;
1045 int hex = input_radix > 10;
1047 if (c == '0' && (p[1] == 'x' || p[1] == 'X'))
1052 else if (c == '0' && (p[1]=='t' || p[1]=='T' || p[1]=='d' || p[1]=='D'))
1060 if (!hex && !got_e && (*p == 'e' || *p == 'E'))
1061 got_dot = got_e = 1;
1062 else if (!hex && !got_d && (*p == 'd' || *p == 'D'))
1063 got_dot = got_d = 1;
1064 else if (!hex && !got_dot && *p == '.')
1066 else if (((got_e && (p[-1] == 'e' || p[-1] == 'E'))
1067 || (got_d && (p[-1] == 'd' || p[-1] == 'D')))
1068 && (*p == '-' || *p == '+'))
1069 /* This is the sign of the exponent, not the end of the
1072 /* We will take any letters or digits. parse_number will
1073 complain if past the radix, or if L or U are not final. */
1074 else if ((*p < '0' || *p > '9')
1075 && ((*p < 'a' || *p > 'z')
1076 && (*p < 'A' || *p > 'Z')))
1079 toktype = parse_number (tokstart, p - tokstart, got_dot|got_e|got_d,
1081 if (toktype == ERROR)
1083 char *err_copy = (char *) alloca (p - tokstart + 1);
1085 memcpy (err_copy, tokstart, p - tokstart);
1086 err_copy[p - tokstart] = 0;
1087 error ("Invalid number \"%s\".", err_copy);
1118 if (!(c == '_' || c == '$'
1119 || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')))
1120 /* We must have come across a bad character (e.g. ';'). */
1121 error ("Invalid character '%c' in expression.", c);
1124 for (c = tokstart[namelen];
1125 (c == '_' || c == '$' || (c >= '0' && c <= '9')
1126 || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'));
1127 c = tokstart[++namelen]);
1129 /* The token "if" terminates the expression and is NOT
1130 removed from the input stream. */
1132 if (namelen == 2 && tokstart[0] == 'i' && tokstart[1] == 'f')
1137 /* Catch specific keywords. */
1139 for (i = 0; f77_keywords[i].operator != NULL; i++)
1140 if (strncmp (tokstart, f77_keywords[i].operator,
1141 strlen(f77_keywords[i].operator)) == 0)
1143 /* lexptr += strlen(f77_keywords[i].operator); */
1144 yylval.opcode = f77_keywords[i].opcode;
1145 return f77_keywords[i].token;
1148 yylval.sval.ptr = tokstart;
1149 yylval.sval.length = namelen;
1151 if (*tokstart == '$')
1153 write_dollar_variable (yylval.sval);
1157 /* Use token-type TYPENAME for symbols that happen to be defined
1158 currently as names of types; NAME for other symbols.
1159 The caller is not constrained to care about the distinction. */
1161 char *tmp = copy_name (yylval.sval);
1163 int is_a_field_of_this = 0;
1166 sym = lookup_symbol (tmp, expression_context_block,
1168 current_language->la_language == language_cplus
1169 ? &is_a_field_of_this : NULL,
1171 if (sym && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
1173 yylval.tsym.type = SYMBOL_TYPE (sym);
1177 = language_lookup_primitive_type_by_name (current_language,
1178 current_gdbarch, tmp);
1179 if (yylval.tsym.type != NULL)
1182 /* Input names that aren't symbols but ARE valid hex numbers,
1183 when the input radix permits them, can be names or numbers
1184 depending on the parse. Note we support radixes > 16 here. */
1186 && ((tokstart[0] >= 'a' && tokstart[0] < 'a' + input_radix - 10)
1187 || (tokstart[0] >= 'A' && tokstart[0] < 'A' + input_radix - 10)))
1189 YYSTYPE newlval; /* Its value is ignored. */
1190 hextype = parse_number (tokstart, namelen, 0, &newlval);
1193 yylval.ssym.sym = sym;
1194 yylval.ssym.is_a_field_of_this = is_a_field_of_this;
1199 /* Any other kind of symbol */
1200 yylval.ssym.sym = sym;
1201 yylval.ssym.is_a_field_of_this = is_a_field_of_this;
1211 lexptr = prev_lexptr;
1213 error ("A %s in expression, near `%s'.", (msg ? msg : "error"), lexptr);