2 /* YACC parser for Fortran expressions, for GDB.
3 Copyright (C) 1986-2019 Free Software Foundation, Inc.
5 Contributed by Motorola. Adapted from the C parser by Farooq Butt
6 (fmbutt@engage.sps.mot.com).
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 3 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, see <http://www.gnu.org/licenses/>. */
23 /* This was blantantly ripped off the C expression parser, please
24 be aware of that as you look at its basic structure -FMB */
26 /* Parse a F77 expression from text in a string,
27 and return the result as a struct expression pointer.
28 That structure contains arithmetic operations in reverse polish,
29 with constants represented by operations that are followed by special data.
30 See expression.h for the details of the format.
31 What is important here is that it can be built up sequentially
32 during the process of parsing; the lower levels of the tree always
33 come first in the result.
35 Note that malloc's and realloc's in this file are transformed to
36 xmalloc and xrealloc respectively by the same sed command in the
37 makefile that remaps any other malloc/realloc inserted by the parser
38 generator. Doing this with #defines and trying to control the interaction
39 with include files (<malloc.h> and <stdlib.h> for example) just became
40 too messy, particularly when such includes can be inserted at random
41 times by the parser generator. */
46 #include "expression.h"
48 #include "parser-defs.h"
51 #include "bfd.h" /* Required by objfiles.h. */
52 #include "symfile.h" /* Required by objfiles.h. */
53 #include "objfiles.h" /* For have_full_symbols and have_partial_symbols */
57 #include "type-stack.h"
59 #define parse_type(ps) builtin_type (ps->gdbarch ())
60 #define parse_f_type(ps) builtin_f_type (ps->gdbarch ())
62 /* Remap normal yacc parser interface names (yyparse, yylex, yyerror,
64 #define GDB_YY_REMAP_PREFIX f_
67 /* The state of the parser, used internally when we are parsing the
70 static struct parser_state *pstate = NULL;
72 /* Depth of parentheses. */
73 static int paren_depth;
75 /* The current type stack. */
76 static struct type_stack *type_stack;
80 static int yylex (void);
82 static void yyerror (const char *);
84 static void growbuf_by_size (int);
86 static int match_string_literal (void);
88 static void push_kind_type (LONGEST val, struct type *type);
90 static struct type *convert_to_kind_type (struct type *basetype, int kind);
94 /* Although the yacc "value" of an expression is not used,
95 since the result is stored in the structure being created,
96 other node types do have values. */
113 struct symtoken ssym;
115 enum exp_opcode opcode;
116 struct internalvar *ivar;
123 /* YYSTYPE gets defined by %union */
124 static int parse_number (struct parser_state *, const char *, int,
128 %type <voidval> exp type_exp start variable
129 %type <tval> type typebase
130 %type <tvec> nonempty_typelist
131 /* %type <bval> block */
133 /* Fancy type parsing. */
134 %type <voidval> func_mod direct_abs_decl abs_decl
137 %token <typed_val> INT
138 %token <typed_val_float> FLOAT
140 /* Both NAME and TYPENAME tokens represent symbols in the input,
141 and both convey their data as strings.
142 But a TYPENAME is a string that happens to be defined as a typedef
143 or builtin type name (such as int or char)
144 and a NAME is any other symbol.
145 Contexts where this distinction is not important can use the
146 nonterminal "name", which matches either NAME or TYPENAME. */
148 %token <sval> STRING_LITERAL
149 %token <lval> BOOLEAN_LITERAL
151 %token <tsym> TYPENAME
153 %type <ssym> name_not_typename
155 /* A NAME_OR_INT is a symbol which is not known in the symbol table,
156 but which would parse as a valid number in the current input radix.
157 E.g. "c" when input_radix==16. Depending on the parse, it will be
158 turned into a name or into a number. */
160 %token <ssym> NAME_OR_INT
165 /* Special type cases, put in to allow the parser to distinguish different
167 %token INT_KEYWORD INT_S2_KEYWORD LOGICAL_S1_KEYWORD LOGICAL_S2_KEYWORD
168 %token LOGICAL_S8_KEYWORD
169 %token LOGICAL_KEYWORD REAL_KEYWORD REAL_S8_KEYWORD REAL_S16_KEYWORD
170 %token COMPLEX_S8_KEYWORD COMPLEX_S16_KEYWORD COMPLEX_S32_KEYWORD
171 %token BOOL_AND BOOL_OR BOOL_NOT
172 %token <lval> CHARACTER
174 %token <voidval> DOLLAR_VARIABLE
176 %token <opcode> ASSIGN_MODIFY
177 %token <opcode> UNOP_INTRINSIC BINOP_INTRINSIC
181 %right '=' ASSIGN_MODIFY
190 %left LESSTHAN GREATERTHAN LEQ GEQ
208 { write_exp_elt_opcode (pstate, OP_TYPE);
209 write_exp_elt_type (pstate, $1);
210 write_exp_elt_opcode (pstate, OP_TYPE); }
217 /* Expressions, not including the comma operator. */
218 exp : '*' exp %prec UNARY
219 { write_exp_elt_opcode (pstate, UNOP_IND); }
222 exp : '&' exp %prec UNARY
223 { write_exp_elt_opcode (pstate, UNOP_ADDR); }
226 exp : '-' exp %prec UNARY
227 { write_exp_elt_opcode (pstate, UNOP_NEG); }
230 exp : BOOL_NOT exp %prec UNARY
231 { write_exp_elt_opcode (pstate, UNOP_LOGICAL_NOT); }
234 exp : '~' exp %prec UNARY
235 { write_exp_elt_opcode (pstate, UNOP_COMPLEMENT); }
238 exp : SIZEOF exp %prec UNARY
239 { write_exp_elt_opcode (pstate, UNOP_SIZEOF); }
242 exp : KIND '(' exp ')' %prec UNARY
243 { write_exp_elt_opcode (pstate, UNOP_FORTRAN_KIND); }
246 /* No more explicit array operators, we treat everything in F77 as
247 a function call. The disambiguation as to whether we are
248 doing a subscript operation or a function call is done
252 { pstate->start_arglist (); }
254 { write_exp_elt_opcode (pstate,
255 OP_F77_UNDETERMINED_ARGLIST);
256 write_exp_elt_longcst (pstate,
257 pstate->end_arglist ());
258 write_exp_elt_opcode (pstate,
259 OP_F77_UNDETERMINED_ARGLIST); }
262 exp : UNOP_INTRINSIC '(' exp ')'
263 { write_exp_elt_opcode (pstate, $1); }
266 exp : BINOP_INTRINSIC '(' exp ',' exp ')'
267 { write_exp_elt_opcode (pstate, $1); }
274 { pstate->arglist_len = 1; }
278 { pstate->arglist_len = 1; }
281 arglist : arglist ',' exp %prec ABOVE_COMMA
282 { pstate->arglist_len++; }
285 /* There are four sorts of subrange types in F90. */
287 subrange: exp ':' exp %prec ABOVE_COMMA
288 { write_exp_elt_opcode (pstate, OP_RANGE);
289 write_exp_elt_longcst (pstate, NONE_BOUND_DEFAULT);
290 write_exp_elt_opcode (pstate, OP_RANGE); }
293 subrange: exp ':' %prec ABOVE_COMMA
294 { write_exp_elt_opcode (pstate, OP_RANGE);
295 write_exp_elt_longcst (pstate, HIGH_BOUND_DEFAULT);
296 write_exp_elt_opcode (pstate, OP_RANGE); }
299 subrange: ':' exp %prec ABOVE_COMMA
300 { write_exp_elt_opcode (pstate, OP_RANGE);
301 write_exp_elt_longcst (pstate, LOW_BOUND_DEFAULT);
302 write_exp_elt_opcode (pstate, OP_RANGE); }
305 subrange: ':' %prec ABOVE_COMMA
306 { write_exp_elt_opcode (pstate, OP_RANGE);
307 write_exp_elt_longcst (pstate, BOTH_BOUND_DEFAULT);
308 write_exp_elt_opcode (pstate, OP_RANGE); }
311 complexnum: exp ',' exp
315 exp : '(' complexnum ')'
316 { write_exp_elt_opcode (pstate, OP_COMPLEX);
317 write_exp_elt_type (pstate,
318 parse_f_type (pstate)
319 ->builtin_complex_s16);
320 write_exp_elt_opcode (pstate, OP_COMPLEX); }
323 exp : '(' type ')' exp %prec UNARY
324 { write_exp_elt_opcode (pstate, UNOP_CAST);
325 write_exp_elt_type (pstate, $2);
326 write_exp_elt_opcode (pstate, UNOP_CAST); }
330 { write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
331 write_exp_string (pstate, $3);
332 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
335 /* Binary operators in order of decreasing precedence. */
338 { write_exp_elt_opcode (pstate, BINOP_REPEAT); }
341 exp : exp STARSTAR exp
342 { write_exp_elt_opcode (pstate, BINOP_EXP); }
346 { write_exp_elt_opcode (pstate, BINOP_MUL); }
350 { write_exp_elt_opcode (pstate, BINOP_DIV); }
354 { write_exp_elt_opcode (pstate, BINOP_ADD); }
358 { write_exp_elt_opcode (pstate, BINOP_SUB); }
362 { write_exp_elt_opcode (pstate, BINOP_LSH); }
366 { write_exp_elt_opcode (pstate, BINOP_RSH); }
370 { write_exp_elt_opcode (pstate, BINOP_EQUAL); }
373 exp : exp NOTEQUAL exp
374 { write_exp_elt_opcode (pstate, BINOP_NOTEQUAL); }
378 { write_exp_elt_opcode (pstate, BINOP_LEQ); }
382 { write_exp_elt_opcode (pstate, BINOP_GEQ); }
385 exp : exp LESSTHAN exp
386 { write_exp_elt_opcode (pstate, BINOP_LESS); }
389 exp : exp GREATERTHAN exp
390 { write_exp_elt_opcode (pstate, BINOP_GTR); }
394 { write_exp_elt_opcode (pstate, BINOP_BITWISE_AND); }
398 { write_exp_elt_opcode (pstate, BINOP_BITWISE_XOR); }
402 { write_exp_elt_opcode (pstate, BINOP_BITWISE_IOR); }
405 exp : exp BOOL_AND exp
406 { write_exp_elt_opcode (pstate, BINOP_LOGICAL_AND); }
410 exp : exp BOOL_OR exp
411 { write_exp_elt_opcode (pstate, BINOP_LOGICAL_OR); }
415 { write_exp_elt_opcode (pstate, BINOP_ASSIGN); }
418 exp : exp ASSIGN_MODIFY exp
419 { write_exp_elt_opcode (pstate, BINOP_ASSIGN_MODIFY);
420 write_exp_elt_opcode (pstate, $2);
421 write_exp_elt_opcode (pstate, BINOP_ASSIGN_MODIFY); }
425 { write_exp_elt_opcode (pstate, OP_LONG);
426 write_exp_elt_type (pstate, $1.type);
427 write_exp_elt_longcst (pstate, (LONGEST) ($1.val));
428 write_exp_elt_opcode (pstate, OP_LONG); }
433 parse_number (pstate, $1.stoken.ptr,
434 $1.stoken.length, 0, &val);
435 write_exp_elt_opcode (pstate, OP_LONG);
436 write_exp_elt_type (pstate, val.typed_val.type);
437 write_exp_elt_longcst (pstate,
438 (LONGEST)val.typed_val.val);
439 write_exp_elt_opcode (pstate, OP_LONG); }
443 { write_exp_elt_opcode (pstate, OP_FLOAT);
444 write_exp_elt_type (pstate, $1.type);
445 write_exp_elt_floatcst (pstate, $1.val);
446 write_exp_elt_opcode (pstate, OP_FLOAT); }
452 exp : DOLLAR_VARIABLE
455 exp : SIZEOF '(' type ')' %prec UNARY
456 { write_exp_elt_opcode (pstate, OP_LONG);
457 write_exp_elt_type (pstate,
458 parse_f_type (pstate)
460 $3 = check_typedef ($3);
461 write_exp_elt_longcst (pstate,
462 (LONGEST) TYPE_LENGTH ($3));
463 write_exp_elt_opcode (pstate, OP_LONG); }
466 exp : BOOLEAN_LITERAL
467 { write_exp_elt_opcode (pstate, OP_BOOL);
468 write_exp_elt_longcst (pstate, (LONGEST) $1);
469 write_exp_elt_opcode (pstate, OP_BOOL);
475 write_exp_elt_opcode (pstate, OP_STRING);
476 write_exp_string (pstate, $1);
477 write_exp_elt_opcode (pstate, OP_STRING);
481 variable: name_not_typename
482 { struct block_symbol sym = $1.sym;
486 if (symbol_read_needs_frame (sym.symbol))
487 pstate->block_tracker->update (sym);
488 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
489 write_exp_elt_block (pstate, sym.block);
490 write_exp_elt_sym (pstate, sym.symbol);
491 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
496 struct bound_minimal_symbol msymbol;
497 std::string arg = copy_name ($1.stoken);
500 lookup_bound_minimal_symbol (arg.c_str ());
501 if (msymbol.minsym != NULL)
502 write_exp_msymbol (pstate, msymbol);
503 else if (!have_full_symbols () && !have_partial_symbols ())
504 error (_("No symbol table is loaded. Use the \"file\" command."));
506 error (_("No symbol \"%s\" in current context."),
519 /* This is where the interesting stuff happens. */
522 struct type *follow_type = $1;
523 struct type *range_type;
526 switch (type_stack->pop ())
532 follow_type = lookup_pointer_type (follow_type);
535 follow_type = lookup_lvalue_reference_type (follow_type);
538 array_size = type_stack->pop_int ();
539 if (array_size != -1)
542 create_static_range_type ((struct type *) NULL,
543 parse_f_type (pstate)
547 create_array_type ((struct type *) NULL,
548 follow_type, range_type);
551 follow_type = lookup_pointer_type (follow_type);
554 follow_type = lookup_function_type (follow_type);
558 int kind_val = type_stack->pop_int ();
560 = convert_to_kind_type (follow_type, kind_val);
569 { type_stack->push (tp_pointer); $$ = 0; }
571 { type_stack->push (tp_pointer); $$ = $2; }
573 { type_stack->push (tp_reference); $$ = 0; }
575 { type_stack->push (tp_reference); $$ = $2; }
579 direct_abs_decl: '(' abs_decl ')'
581 | '(' KIND '=' INT ')'
582 { push_kind_type ($4.val, $4.type); }
584 { push_kind_type ($2.val, $2.type); }
585 | direct_abs_decl func_mod
586 { type_stack->push (tp_function); }
588 { type_stack->push (tp_function); }
593 | '(' nonempty_typelist ')'
594 { free ($2); $$ = 0; }
597 typebase /* Implements (approximately): (type-qualifier)* type-specifier */
601 { $$ = parse_f_type (pstate)->builtin_integer; }
603 { $$ = parse_f_type (pstate)->builtin_integer_s2; }
605 { $$ = parse_f_type (pstate)->builtin_character; }
607 { $$ = parse_f_type (pstate)->builtin_logical_s8; }
609 { $$ = parse_f_type (pstate)->builtin_logical; }
611 { $$ = parse_f_type (pstate)->builtin_logical_s2; }
613 { $$ = parse_f_type (pstate)->builtin_logical_s1; }
615 { $$ = parse_f_type (pstate)->builtin_real; }
617 { $$ = parse_f_type (pstate)->builtin_real_s8; }
619 { $$ = parse_f_type (pstate)->builtin_real_s16; }
621 { $$ = parse_f_type (pstate)->builtin_complex_s8; }
622 | COMPLEX_S16_KEYWORD
623 { $$ = parse_f_type (pstate)->builtin_complex_s16; }
624 | COMPLEX_S32_KEYWORD
625 { $$ = parse_f_type (pstate)->builtin_complex_s32; }
630 { $$ = (struct type **) malloc (sizeof (struct type *) * 2);
631 $<ivec>$[0] = 1; /* Number of types in vector */
634 | nonempty_typelist ',' type
635 { int len = sizeof (struct type *) * (++($<ivec>1[0]) + 1);
636 $$ = (struct type **) realloc ((char *) $1, len);
637 $$[$<ivec>$[0]] = $3;
645 name_not_typename : NAME
646 /* These would be useful if name_not_typename was useful, but it is just
647 a fake for "variable", so these cause reduce/reduce conflicts because
648 the parser can't tell whether NAME_OR_INT is a name_not_typename (=variable,
649 =exp) or just an exp. If name_not_typename was ever used in an lvalue
650 context where only a name could occur, this might be useful.
657 /* Take care of parsing a number (anything that starts with a digit).
658 Set yylval and return the token type; update lexptr.
659 LEN is the number of characters in it. */
661 /*** Needs some error checking for the float case ***/
664 parse_number (struct parser_state *par_state,
665 const char *p, int len, int parsed_float, YYSTYPE *putithere)
670 int base = input_radix;
674 struct type *signed_type;
675 struct type *unsigned_type;
679 /* It's a float since it contains a point or an exponent. */
680 /* [dD] is not understood as an exponent by parse_float,
685 for (tmp2 = tmp; *tmp2; ++tmp2)
686 if (*tmp2 == 'd' || *tmp2 == 'D')
689 /* FIXME: Should this use different types? */
690 putithere->typed_val_float.type = parse_f_type (pstate)->builtin_real_s8;
691 bool parsed = parse_float (tmp, len,
692 putithere->typed_val_float.type,
693 putithere->typed_val_float.val);
695 return parsed? FLOAT : ERROR;
698 /* Handle base-switching prefixes 0x, 0t, 0d, 0 */
734 if (len == 0 && c == 'l')
736 else if (len == 0 && c == 'u')
741 if (c >= '0' && c <= '9')
743 else if (c >= 'a' && c <= 'f')
746 return ERROR; /* Char not a digit */
748 return ERROR; /* Invalid digit in this base */
752 /* Portably test for overflow (only works for nonzero values, so make
753 a second check for zero). */
754 if ((prevn >= n) && n != 0)
755 unsigned_p=1; /* Try something unsigned */
756 /* If range checking enabled, portably test for unsigned overflow. */
757 if (RANGE_CHECK && n != 0)
759 if ((unsigned_p && (unsigned)prevn >= (unsigned)n))
760 range_error (_("Overflow on numeric constant."));
765 /* If the number is too big to be an int, or it's got an l suffix
766 then it's a long. Work out if this has to be a long by
767 shifting right and seeing if anything remains, and the
768 target int size is different to the target long size.
770 In the expression below, we could have tested
771 (n >> gdbarch_int_bit (parse_gdbarch))
772 to see if it was zero,
773 but too many compilers warn about that, when ints and longs
774 are the same size. So we shift it twice, with fewer bits
775 each time, for the same result. */
777 if ((gdbarch_int_bit (par_state->gdbarch ())
778 != gdbarch_long_bit (par_state->gdbarch ())
780 >> (gdbarch_int_bit (par_state->gdbarch ())-2))) /* Avoid
784 high_bit = ((ULONGEST)1)
785 << (gdbarch_long_bit (par_state->gdbarch ())-1);
786 unsigned_type = parse_type (par_state)->builtin_unsigned_long;
787 signed_type = parse_type (par_state)->builtin_long;
792 ((ULONGEST)1) << (gdbarch_int_bit (par_state->gdbarch ()) - 1);
793 unsigned_type = parse_type (par_state)->builtin_unsigned_int;
794 signed_type = parse_type (par_state)->builtin_int;
797 putithere->typed_val.val = n;
799 /* If the high bit of the worked out type is set then this number
800 has to be unsigned. */
802 if (unsigned_p || (n & high_bit))
803 putithere->typed_val.type = unsigned_type;
805 putithere->typed_val.type = signed_type;
810 /* Called to setup the type stack when we encounter a '(kind=N)' type
811 modifier, performs some bounds checking on 'N' and then pushes this to
812 the type stack followed by the 'tp_kind' marker. */
814 push_kind_type (LONGEST val, struct type *type)
818 if (TYPE_UNSIGNED (type))
820 ULONGEST uval = static_cast <ULONGEST> (val);
822 error (_("kind value out of range"));
823 ival = static_cast <int> (uval);
827 if (val > INT_MAX || val < 0)
828 error (_("kind value out of range"));
829 ival = static_cast <int> (val);
832 type_stack->push (ival);
833 type_stack->push (tp_kind);
836 /* Called when a type has a '(kind=N)' modifier after it, for example
837 'character(kind=1)'. The BASETYPE is the type described by 'character'
838 in our example, and KIND is the integer '1'. This function returns a
839 new type that represents the basetype of a specific kind. */
841 convert_to_kind_type (struct type *basetype, int kind)
843 if (basetype == parse_f_type (pstate)->builtin_character)
845 /* Character of kind 1 is a special case, this is the same as the
846 base character type. */
848 return parse_f_type (pstate)->builtin_character;
850 else if (basetype == parse_f_type (pstate)->builtin_complex_s8)
853 return parse_f_type (pstate)->builtin_complex_s8;
855 return parse_f_type (pstate)->builtin_complex_s16;
857 return parse_f_type (pstate)->builtin_complex_s32;
859 else if (basetype == parse_f_type (pstate)->builtin_real)
862 return parse_f_type (pstate)->builtin_real;
864 return parse_f_type (pstate)->builtin_real_s8;
866 return parse_f_type (pstate)->builtin_real_s16;
868 else if (basetype == parse_f_type (pstate)->builtin_logical)
871 return parse_f_type (pstate)->builtin_logical_s1;
873 return parse_f_type (pstate)->builtin_logical_s2;
875 return parse_f_type (pstate)->builtin_logical;
877 return parse_f_type (pstate)->builtin_logical_s8;
879 else if (basetype == parse_f_type (pstate)->builtin_integer)
882 return parse_f_type (pstate)->builtin_integer_s2;
884 return parse_f_type (pstate)->builtin_integer;
886 return parse_f_type (pstate)->builtin_integer_s8;
889 error (_("unsupported kind %d for type %s"),
890 kind, TYPE_SAFE_NAME (basetype));
892 /* Should never get here. */
898 /* The string to match against. */
901 /* The lexer token to return. */
904 /* The expression opcode to embed within the token. */
905 enum exp_opcode opcode;
907 /* When this is true the string in OPER is matched exactly including
908 case, when this is false OPER is matched case insensitively. */
912 static const struct token dot_ops[] =
914 { ".and.", BOOL_AND, BINOP_END, false },
915 { ".or.", BOOL_OR, BINOP_END, false },
916 { ".not.", BOOL_NOT, BINOP_END, false },
917 { ".eq.", EQUAL, BINOP_END, false },
918 { ".eqv.", EQUAL, BINOP_END, false },
919 { ".neqv.", NOTEQUAL, BINOP_END, false },
920 { ".ne.", NOTEQUAL, BINOP_END, false },
921 { ".le.", LEQ, BINOP_END, false },
922 { ".ge.", GEQ, BINOP_END, false },
923 { ".gt.", GREATERTHAN, BINOP_END, false },
924 { ".lt.", LESSTHAN, BINOP_END, false },
927 /* Holds the Fortran representation of a boolean, and the integer value we
928 substitute in when one of the matching strings is parsed. */
929 struct f77_boolean_val
931 /* The string representing a Fortran boolean. */
934 /* The integer value to replace it with. */
938 /* The set of Fortran booleans. These are matched case insensitively. */
939 static const struct f77_boolean_val boolean_values[] =
945 static const struct token f77_keywords[] =
947 /* Historically these have always been lowercase only in GDB. */
948 { "complex_16", COMPLEX_S16_KEYWORD, BINOP_END, true },
949 { "complex_32", COMPLEX_S32_KEYWORD, BINOP_END, true },
950 { "character", CHARACTER, BINOP_END, true },
951 { "integer_2", INT_S2_KEYWORD, BINOP_END, true },
952 { "logical_1", LOGICAL_S1_KEYWORD, BINOP_END, true },
953 { "logical_2", LOGICAL_S2_KEYWORD, BINOP_END, true },
954 { "logical_8", LOGICAL_S8_KEYWORD, BINOP_END, true },
955 { "complex_8", COMPLEX_S8_KEYWORD, BINOP_END, true },
956 { "integer", INT_KEYWORD, BINOP_END, true },
957 { "logical", LOGICAL_KEYWORD, BINOP_END, true },
958 { "real_16", REAL_S16_KEYWORD, BINOP_END, true },
959 { "complex", COMPLEX_S8_KEYWORD, BINOP_END, true },
960 { "sizeof", SIZEOF, BINOP_END, true },
961 { "real_8", REAL_S8_KEYWORD, BINOP_END, true },
962 { "real", REAL_KEYWORD, BINOP_END, true },
963 /* The following correspond to actual functions in Fortran and are case
965 { "kind", KIND, BINOP_END, false },
966 { "abs", UNOP_INTRINSIC, UNOP_ABS, false },
967 { "mod", BINOP_INTRINSIC, BINOP_MOD, false },
968 { "floor", UNOP_INTRINSIC, UNOP_FORTRAN_FLOOR, false },
969 { "ceiling", UNOP_INTRINSIC, UNOP_FORTRAN_CEILING, false },
970 { "modulo", BINOP_INTRINSIC, BINOP_FORTRAN_MODULO, false },
971 { "cmplx", BINOP_INTRINSIC, BINOP_FORTRAN_CMPLX, false },
974 /* Implementation of a dynamically expandable buffer for processing input
975 characters acquired through lexptr and building a value to return in
976 yylval. Ripped off from ch-exp.y */
978 static char *tempbuf; /* Current buffer contents */
979 static int tempbufsize; /* Size of allocated buffer */
980 static int tempbufindex; /* Current index into buffer */
982 #define GROWBY_MIN_SIZE 64 /* Minimum amount to grow buffer by */
984 #define CHECKBUF(size) \
986 if (tempbufindex + (size) >= tempbufsize) \
988 growbuf_by_size (size); \
993 /* Grow the static temp buffer if necessary, including allocating the
994 first one on demand. */
997 growbuf_by_size (int count)
1001 growby = std::max (count, GROWBY_MIN_SIZE);
1002 tempbufsize += growby;
1003 if (tempbuf == NULL)
1004 tempbuf = (char *) malloc (tempbufsize);
1006 tempbuf = (char *) realloc (tempbuf, tempbufsize);
1009 /* Blatantly ripped off from ch-exp.y. This routine recognizes F77
1012 Recognize a string literal. A string literal is a nonzero sequence
1013 of characters enclosed in matching single quotes, except that
1014 a single character inside single quotes is a character literal, which
1015 we reject as a string literal. To embed the terminator character inside
1016 a string, it is simply doubled (I.E. 'this''is''one''string') */
1019 match_string_literal (void)
1021 const char *tokptr = pstate->lexptr;
1023 for (tempbufindex = 0, tokptr++; *tokptr != '\0'; tokptr++)
1026 if (*tokptr == *pstate->lexptr)
1028 if (*(tokptr + 1) == *pstate->lexptr)
1033 tempbuf[tempbufindex++] = *tokptr;
1035 if (*tokptr == '\0' /* no terminator */
1036 || tempbufindex == 0) /* no string */
1040 tempbuf[tempbufindex] = '\0';
1041 yylval.sval.ptr = tempbuf;
1042 yylval.sval.length = tempbufindex;
1043 pstate->lexptr = ++tokptr;
1044 return STRING_LITERAL;
1048 /* Read one token, getting characters through lexptr. */
1056 const char *tokstart;
1060 pstate->prev_lexptr = pstate->lexptr;
1062 tokstart = pstate->lexptr;
1064 /* First of all, let us make sure we are not dealing with the
1065 special tokens .true. and .false. which evaluate to 1 and 0. */
1067 if (*pstate->lexptr == '.')
1069 for (int i = 0; i < ARRAY_SIZE (boolean_values); i++)
1071 if (strncasecmp (tokstart, boolean_values[i].name,
1072 strlen (boolean_values[i].name)) == 0)
1074 pstate->lexptr += strlen (boolean_values[i].name);
1075 yylval.lval = boolean_values[i].value;
1076 return BOOLEAN_LITERAL;
1081 /* See if it is a special .foo. operator. */
1082 for (int i = 0; i < ARRAY_SIZE (dot_ops); i++)
1083 if (strncasecmp (tokstart, dot_ops[i].oper,
1084 strlen (dot_ops[i].oper)) == 0)
1086 gdb_assert (!dot_ops[i].case_sensitive);
1087 pstate->lexptr += strlen (dot_ops[i].oper);
1088 yylval.opcode = dot_ops[i].opcode;
1089 return dot_ops[i].token;
1092 /* See if it is an exponentiation operator. */
1094 if (strncmp (tokstart, "**", 2) == 0)
1096 pstate->lexptr += 2;
1097 yylval.opcode = BINOP_EXP;
1101 switch (c = *tokstart)
1113 token = match_string_literal ();
1124 if (paren_depth == 0)
1131 if (pstate->comma_terminates && paren_depth == 0)
1137 /* Might be a floating point number. */
1138 if (pstate->lexptr[1] < '0' || pstate->lexptr[1] > '9')
1139 goto symbol; /* Nope, must be a symbol. */
1153 /* It's a number. */
1154 int got_dot = 0, got_e = 0, got_d = 0, toktype;
1155 const char *p = tokstart;
1156 int hex = input_radix > 10;
1158 if (c == '0' && (p[1] == 'x' || p[1] == 'X'))
1163 else if (c == '0' && (p[1]=='t' || p[1]=='T'
1164 || p[1]=='d' || p[1]=='D'))
1172 if (!hex && !got_e && (*p == 'e' || *p == 'E'))
1173 got_dot = got_e = 1;
1174 else if (!hex && !got_d && (*p == 'd' || *p == 'D'))
1175 got_dot = got_d = 1;
1176 else if (!hex && !got_dot && *p == '.')
1178 else if (((got_e && (p[-1] == 'e' || p[-1] == 'E'))
1179 || (got_d && (p[-1] == 'd' || p[-1] == 'D')))
1180 && (*p == '-' || *p == '+'))
1181 /* This is the sign of the exponent, not the end of the
1184 /* We will take any letters or digits. parse_number will
1185 complain if past the radix, or if L or U are not final. */
1186 else if ((*p < '0' || *p > '9')
1187 && ((*p < 'a' || *p > 'z')
1188 && (*p < 'A' || *p > 'Z')))
1191 toktype = parse_number (pstate, tokstart, p - tokstart,
1192 got_dot|got_e|got_d,
1194 if (toktype == ERROR)
1196 char *err_copy = (char *) alloca (p - tokstart + 1);
1198 memcpy (err_copy, tokstart, p - tokstart);
1199 err_copy[p - tokstart] = 0;
1200 error (_("Invalid number \"%s\"."), err_copy);
1231 if (!(c == '_' || c == '$' || c ==':'
1232 || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')))
1233 /* We must have come across a bad character (e.g. ';'). */
1234 error (_("Invalid character '%c' in expression."), c);
1237 for (c = tokstart[namelen];
1238 (c == '_' || c == '$' || c == ':' || (c >= '0' && c <= '9')
1239 || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'));
1240 c = tokstart[++namelen]);
1242 /* The token "if" terminates the expression and is NOT
1243 removed from the input stream. */
1245 if (namelen == 2 && tokstart[0] == 'i' && tokstart[1] == 'f')
1248 pstate->lexptr += namelen;
1250 /* Catch specific keywords. */
1252 for (int i = 0; i < ARRAY_SIZE (f77_keywords); i++)
1253 if (strlen (f77_keywords[i].oper) == namelen
1254 && ((!f77_keywords[i].case_sensitive
1255 && strncasecmp (tokstart, f77_keywords[i].oper, namelen) == 0)
1256 || (f77_keywords[i].case_sensitive
1257 && strncmp (tokstart, f77_keywords[i].oper, namelen) == 0)))
1259 yylval.opcode = f77_keywords[i].opcode;
1260 return f77_keywords[i].token;
1263 yylval.sval.ptr = tokstart;
1264 yylval.sval.length = namelen;
1266 if (*tokstart == '$')
1268 write_dollar_variable (pstate, yylval.sval);
1269 return DOLLAR_VARIABLE;
1272 /* Use token-type TYPENAME for symbols that happen to be defined
1273 currently as names of types; NAME for other symbols.
1274 The caller is not constrained to care about the distinction. */
1276 std::string tmp = copy_name (yylval.sval);
1277 struct block_symbol result;
1278 struct field_of_this_result is_a_field_of_this;
1279 enum domain_enum_tag lookup_domains[] =
1287 for (int i = 0; i < ARRAY_SIZE (lookup_domains); ++i)
1289 /* Initialize this in case we *don't* use it in this call; that
1290 way we can refer to it unconditionally below. */
1291 memset (&is_a_field_of_this, 0, sizeof (is_a_field_of_this));
1293 result = lookup_symbol (tmp.c_str (), pstate->expression_context_block,
1295 pstate->language ()->la_language
1297 ? &is_a_field_of_this : NULL);
1298 if (result.symbol && SYMBOL_CLASS (result.symbol) == LOC_TYPEDEF)
1300 yylval.tsym.type = SYMBOL_TYPE (result.symbol);
1309 = language_lookup_primitive_type (pstate->language (),
1310 pstate->gdbarch (), tmp.c_str ());
1311 if (yylval.tsym.type != NULL)
1314 /* Input names that aren't symbols but ARE valid hex numbers,
1315 when the input radix permits them, can be names or numbers
1316 depending on the parse. Note we support radixes > 16 here. */
1318 && ((tokstart[0] >= 'a' && tokstart[0] < 'a' + input_radix - 10)
1319 || (tokstart[0] >= 'A' && tokstart[0] < 'A' + input_radix - 10)))
1321 YYSTYPE newlval; /* Its value is ignored. */
1322 hextype = parse_number (pstate, tokstart, namelen, 0, &newlval);
1325 yylval.ssym.sym = result;
1326 yylval.ssym.is_a_field_of_this = is_a_field_of_this.type != NULL;
1331 /* Any other kind of symbol */
1332 yylval.ssym.sym = result;
1333 yylval.ssym.is_a_field_of_this = is_a_field_of_this.type != NULL;
1339 f_parse (struct parser_state *par_state)
1341 /* Setting up the parser state. */
1342 scoped_restore pstate_restore = make_scoped_restore (&pstate);
1343 scoped_restore restore_yydebug = make_scoped_restore (&yydebug,
1345 gdb_assert (par_state != NULL);
1349 struct type_stack stack;
1350 scoped_restore restore_type_stack = make_scoped_restore (&type_stack,
1357 yyerror (const char *msg)
1359 if (pstate->prev_lexptr)
1360 pstate->lexptr = pstate->prev_lexptr;
1362 error (_("A %s in expression, near `%s'."), msg, pstate->lexptr);