1 /* Matching subroutines in all sizes, shapes and colors.
2 Copyright (C) 2000-2019 Free Software Foundation, Inc.
3 Contributed by Andy Vaught
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
29 int gfc_matching_ptr_assignment
= 0;
30 int gfc_matching_procptr_assignment
= 0;
31 bool gfc_matching_prefix
= false;
33 /* Stack of SELECT TYPE statements. */
34 gfc_select_type_stack
*select_type_stack
= NULL
;
36 /* List of type parameter expressions. */
37 gfc_actual_arglist
*type_param_spec_list
;
39 /* For debugging and diagnostic purposes. Return the textual representation
40 of the intrinsic operator OP. */
42 gfc_op2string (gfc_intrinsic_op op
)
50 case INTRINSIC_UMINUS
:
56 case INTRINSIC_CONCAT
:
60 case INTRINSIC_DIVIDE
:
99 case INTRINSIC_ASSIGN
:
102 case INTRINSIC_PARENTHESES
:
109 case INTRINSIC_FORMATTED
:
111 case INTRINSIC_UNFORMATTED
:
112 return "unformatted";
118 gfc_internal_error ("gfc_op2string(): Bad code");
123 /******************** Generic matching subroutines ************************/
125 /* Matches a member separator. With standard FORTRAN this is '%', but with
126 DEC structures we must carefully match dot ('.').
127 Because operators are spelled ".op.", a dotted string such as "x.y.z..."
128 can be either a component reference chain or a combination of binary
130 There is no real way to win because the string may be grammatically
131 ambiguous. The following rules help avoid ambiguities - they match
132 some behavior of other (older) compilers. If the rules here are changed
133 the test cases should be updated. If the user has problems with these rules
134 they probably deserve the consequences. Consider "x.y.z":
135 (1) If any user defined operator ".y." exists, this is always y(x,z)
136 (even if ".y." is the wrong type and/or x has a member y).
137 (2) Otherwise if x has a member y, and y is itself a derived type,
138 this is (x->y)->z, even if an intrinsic operator exists which
140 (3) If x has no member y or (x->y) is not a derived type but ".y."
141 is an intrinsic operator (such as ".eq."), this is y(x,z).
142 (4) Lastly if there is no operator ".y." and x has no member "y", it is an
144 It is worth noting that the logic here does not support mixed use of member
145 accessors within a single string. That is, even if x has component y and y
146 has component z, the following are all syntax errors:
147 "x%y.z" "x.y%z" "(x.y).z" "(x%y)%z"
151 gfc_match_member_sep(gfc_symbol
*sym
)
153 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
154 locus dot_loc
, start_loc
;
155 gfc_intrinsic_op iop
;
158 gfc_component
*c
= NULL
;
160 /* What a relief: '%' is an unambiguous member separator. */
161 if (gfc_match_char ('%') == MATCH_YES
)
164 /* Beware ye who enter here. */
165 if (!flag_dec_structure
|| !sym
)
170 /* We may be given either a derived type variable or the derived type
171 declaration itself (which actually contains the components);
172 we need the latter to search for components. */
173 if (gfc_fl_struct (sym
->attr
.flavor
))
175 else if (gfc_bt_struct (sym
->ts
.type
))
176 tsym
= sym
->ts
.u
.derived
;
178 iop
= INTRINSIC_NONE
;
182 /* If we have to reject come back here later. */
183 start_loc
= gfc_current_locus
;
185 /* Look for a component access next. */
186 if (gfc_match_char ('.') != MATCH_YES
)
189 /* If we accept, come back here. */
190 dot_loc
= gfc_current_locus
;
192 /* Try to match a symbol name following the dot. */
193 if (gfc_match_name (name
) != MATCH_YES
)
195 gfc_error ("Expected structure component or operator name "
200 /* If no dot follows we have "x.y" which should be a component access. */
201 if (gfc_match_char ('.') != MATCH_YES
)
204 /* Now we have a string "x.y.z" which could be a nested member access
205 (x->y)->z or a binary operation y on x and z. */
207 /* First use any user-defined operators ".y." */
208 if (gfc_find_uop (name
, sym
->ns
) != NULL
)
211 /* Match accesses to existing derived-type components for
212 derived-type vars: "x.y.z" = (x->y)->z */
213 c
= gfc_find_component(tsym
, name
, false, true, NULL
);
214 if (c
&& (gfc_bt_struct (c
->ts
.type
) || c
->ts
.type
== BT_CLASS
))
217 /* If y is not a component or has no members, try intrinsic operators. */
218 gfc_current_locus
= start_loc
;
219 if (gfc_match_intrinsic_op (&iop
) != MATCH_YES
)
221 /* If ".y." is not an intrinsic operator but y was a valid non-
222 structure component, match and leave the trailing dot to be
227 gfc_error ("%qs is neither a defined operator nor a "
228 "structure component in dotted string at %C", name
);
232 /* .y. is an intrinsic operator, overriding any possible member access. */
235 /* Return keeping the current locus consistent with the match result. */
239 gfc_current_locus
= start_loc
;
242 gfc_current_locus
= dot_loc
;
247 /* This function scans the current statement counting the opened and closed
248 parenthesis to make sure they are balanced. */
251 gfc_match_parens (void)
253 locus old_loc
, where
;
255 gfc_instring instring
;
258 old_loc
= gfc_current_locus
;
260 instring
= NONSTRING
;
266 where
= gfc_current_locus
;
267 c
= gfc_next_char_literal (instring
);
270 if (quote
== ' ' && ((c
== '\'') || (c
== '"')))
273 instring
= INSTRING_WARN
;
276 if (quote
!= ' ' && c
== quote
)
279 instring
= NONSTRING
;
283 if (c
== '(' && quote
== ' ')
287 if (c
== ')' && quote
== ' ')
290 where
= gfc_current_locus
;
294 gfc_current_locus
= old_loc
;
298 gfc_error ("Missing %qs in statement at or before %L",
299 count
> 0? ")":"(", &where
);
307 /* See if the next character is a special character that has
308 escaped by a \ via the -fbackslash option. */
311 gfc_match_special_char (gfc_char_t
*res
)
319 switch ((c
= gfc_next_char_literal (INSTRING_WARN
)))
352 /* Hexadecimal form of wide characters. */
353 len
= (c
== 'x' ? 2 : (c
== 'u' ? 4 : 8));
355 for (i
= 0; i
< len
; i
++)
357 char buf
[2] = { '\0', '\0' };
359 c
= gfc_next_char_literal (INSTRING_WARN
);
360 if (!gfc_wide_fits_in_byte (c
)
361 || !gfc_check_digit ((unsigned char) c
, 16))
364 buf
[0] = (unsigned char) c
;
366 n
+= strtol (buf
, NULL
, 16);
372 /* Unknown backslash codes are simply not expanded. */
381 /* In free form, match at least one space. Always matches in fixed
385 gfc_match_space (void)
390 if (gfc_current_form
== FORM_FIXED
)
393 old_loc
= gfc_current_locus
;
395 c
= gfc_next_ascii_char ();
396 if (!gfc_is_whitespace (c
))
398 gfc_current_locus
= old_loc
;
402 gfc_gobble_whitespace ();
408 /* Match an end of statement. End of statement is optional
409 whitespace, followed by a ';' or '\n' or comment '!'. If a
410 semicolon is found, we continue to eat whitespace and semicolons. */
423 old_loc
= gfc_current_locus
;
424 gfc_gobble_whitespace ();
426 c
= gfc_next_ascii_char ();
432 c
= gfc_next_ascii_char ();
449 gfc_current_locus
= old_loc
;
450 return (flag
) ? MATCH_YES
: MATCH_NO
;
454 /* Match a literal integer on the input, setting the value on
455 MATCH_YES. Literal ints occur in kind-parameters as well as
456 old-style character length specifications. If cnt is non-NULL it
457 will be set to the number of digits. */
460 gfc_match_small_literal_int (int *value
, int *cnt
)
466 old_loc
= gfc_current_locus
;
469 gfc_gobble_whitespace ();
470 c
= gfc_next_ascii_char ();
476 gfc_current_locus
= old_loc
;
485 old_loc
= gfc_current_locus
;
486 c
= gfc_next_ascii_char ();
491 i
= 10 * i
+ c
- '0';
496 gfc_error ("Integer too large at %C");
501 gfc_current_locus
= old_loc
;
510 /* Match a small, constant integer expression, like in a kind
511 statement. On MATCH_YES, 'value' is set. */
514 gfc_match_small_int (int *value
)
520 m
= gfc_match_expr (&expr
);
524 if (gfc_extract_int (expr
, &i
, 1))
526 gfc_free_expr (expr
);
533 /* This function is the same as the gfc_match_small_int, except that
534 we're keeping the pointer to the expr. This function could just be
535 removed and the previously mentioned one modified, though all calls
536 to it would have to be modified then (and there were a number of
537 them). Return MATCH_ERROR if fail to extract the int; otherwise,
538 return the result of gfc_match_expr(). The expr (if any) that was
539 matched is returned in the parameter expr. */
542 gfc_match_small_int_expr (int *value
, gfc_expr
**expr
)
547 m
= gfc_match_expr (expr
);
551 if (gfc_extract_int (*expr
, &i
, 1))
559 /* Matches a statement label. Uses gfc_match_small_literal_int() to
560 do most of the work. */
563 gfc_match_st_label (gfc_st_label
**label
)
569 old_loc
= gfc_current_locus
;
571 m
= gfc_match_small_literal_int (&i
, &cnt
);
577 gfc_error ("Too many digits in statement label at %C");
583 gfc_error ("Statement label at %C is zero");
587 *label
= gfc_get_st_label (i
);
592 gfc_current_locus
= old_loc
;
597 /* Match and validate a label associated with a named IF, DO or SELECT
598 statement. If the symbol does not have the label attribute, we add
599 it. We also make sure the symbol does not refer to another
600 (active) block. A matched label is pointed to by gfc_new_block. */
603 gfc_match_label (void)
605 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
608 gfc_new_block
= NULL
;
610 m
= gfc_match (" %n :", name
);
614 if (gfc_get_symbol (name
, NULL
, &gfc_new_block
))
616 gfc_error ("Label name %qs at %C is ambiguous", name
);
620 if (gfc_new_block
->attr
.flavor
== FL_LABEL
)
622 gfc_error ("Duplicate construct label %qs at %C", name
);
626 if (!gfc_add_flavor (&gfc_new_block
->attr
, FL_LABEL
,
627 gfc_new_block
->name
, NULL
))
634 /* See if the current input looks like a name of some sort. Modifies
635 the passed buffer which must be GFC_MAX_SYMBOL_LEN+1 bytes long.
636 Note that options.c restricts max_identifier_length to not more
637 than GFC_MAX_SYMBOL_LEN. */
640 gfc_match_name (char *buffer
)
646 old_loc
= gfc_current_locus
;
647 gfc_gobble_whitespace ();
649 c
= gfc_next_ascii_char ();
650 if (!(ISALPHA (c
) || (c
== '_' && flag_allow_leading_underscore
)))
652 /* Special cases for unary minus and plus, which allows for a sensible
653 error message for code of the form 'c = exp(-a*b) )' where an
654 extra ')' appears at the end of statement. */
655 if (!gfc_error_flag_test () && c
!= '(' && c
!= '-' && c
!= '+')
656 gfc_error ("Invalid character in name at %C");
657 gfc_current_locus
= old_loc
;
667 if (i
> gfc_option
.max_identifier_length
)
669 gfc_error ("Name at %C is too long");
673 old_loc
= gfc_current_locus
;
674 c
= gfc_next_ascii_char ();
676 while (ISALNUM (c
) || c
== '_' || (flag_dollar_ok
&& c
== '$'));
678 if (c
== '$' && !flag_dollar_ok
)
680 gfc_fatal_error ("Invalid character %<$%> at %L. Use %<-fdollar-ok%> to "
681 "allow it as an extension", &old_loc
);
686 gfc_current_locus
= old_loc
;
692 /* Match a symbol on the input. Modifies the pointer to the symbol
693 pointer if successful. */
696 gfc_match_sym_tree (gfc_symtree
**matched_symbol
, int host_assoc
)
698 char buffer
[GFC_MAX_SYMBOL_LEN
+ 1];
701 m
= gfc_match_name (buffer
);
706 return (gfc_get_ha_sym_tree (buffer
, matched_symbol
))
707 ? MATCH_ERROR
: MATCH_YES
;
709 if (gfc_get_sym_tree (buffer
, NULL
, matched_symbol
, false))
717 gfc_match_symbol (gfc_symbol
**matched_symbol
, int host_assoc
)
722 m
= gfc_match_sym_tree (&st
, host_assoc
);
727 *matched_symbol
= st
->n
.sym
;
729 *matched_symbol
= NULL
;
732 *matched_symbol
= NULL
;
737 /* Match an intrinsic operator. Returns an INTRINSIC enum. While matching,
738 we always find INTRINSIC_PLUS before INTRINSIC_UPLUS. We work around this
742 gfc_match_intrinsic_op (gfc_intrinsic_op
*result
)
744 locus orig_loc
= gfc_current_locus
;
747 gfc_gobble_whitespace ();
748 ch
= gfc_next_ascii_char ();
753 *result
= INTRINSIC_PLUS
;
758 *result
= INTRINSIC_MINUS
;
762 if (gfc_next_ascii_char () == '=')
765 *result
= INTRINSIC_EQ
;
771 if (gfc_peek_ascii_char () == '=')
774 gfc_next_ascii_char ();
775 *result
= INTRINSIC_LE
;
779 *result
= INTRINSIC_LT
;
783 if (gfc_peek_ascii_char () == '=')
786 gfc_next_ascii_char ();
787 *result
= INTRINSIC_GE
;
791 *result
= INTRINSIC_GT
;
795 if (gfc_peek_ascii_char () == '*')
798 gfc_next_ascii_char ();
799 *result
= INTRINSIC_POWER
;
803 *result
= INTRINSIC_TIMES
;
807 ch
= gfc_peek_ascii_char ();
811 gfc_next_ascii_char ();
812 *result
= INTRINSIC_NE
;
818 gfc_next_ascii_char ();
819 *result
= INTRINSIC_CONCAT
;
823 *result
= INTRINSIC_DIVIDE
;
827 ch
= gfc_next_ascii_char ();
831 if (gfc_next_ascii_char () == 'n'
832 && gfc_next_ascii_char () == 'd'
833 && gfc_next_ascii_char () == '.')
835 /* Matched ".and.". */
836 *result
= INTRINSIC_AND
;
842 if (gfc_next_ascii_char () == 'q')
844 ch
= gfc_next_ascii_char ();
847 /* Matched ".eq.". */
848 *result
= INTRINSIC_EQ_OS
;
853 if (gfc_next_ascii_char () == '.')
855 /* Matched ".eqv.". */
856 *result
= INTRINSIC_EQV
;
864 ch
= gfc_next_ascii_char ();
867 if (gfc_next_ascii_char () == '.')
869 /* Matched ".ge.". */
870 *result
= INTRINSIC_GE_OS
;
876 if (gfc_next_ascii_char () == '.')
878 /* Matched ".gt.". */
879 *result
= INTRINSIC_GT_OS
;
886 ch
= gfc_next_ascii_char ();
889 if (gfc_next_ascii_char () == '.')
891 /* Matched ".le.". */
892 *result
= INTRINSIC_LE_OS
;
898 if (gfc_next_ascii_char () == '.')
900 /* Matched ".lt.". */
901 *result
= INTRINSIC_LT_OS
;
908 ch
= gfc_next_ascii_char ();
911 ch
= gfc_next_ascii_char ();
914 /* Matched ".ne.". */
915 *result
= INTRINSIC_NE_OS
;
920 if (gfc_next_ascii_char () == 'v'
921 && gfc_next_ascii_char () == '.')
923 /* Matched ".neqv.". */
924 *result
= INTRINSIC_NEQV
;
931 if (gfc_next_ascii_char () == 't'
932 && gfc_next_ascii_char () == '.')
934 /* Matched ".not.". */
935 *result
= INTRINSIC_NOT
;
942 if (gfc_next_ascii_char () == 'r'
943 && gfc_next_ascii_char () == '.')
945 /* Matched ".or.". */
946 *result
= INTRINSIC_OR
;
952 if (gfc_next_ascii_char () == 'o'
953 && gfc_next_ascii_char () == 'r'
954 && gfc_next_ascii_char () == '.')
956 if (!gfc_notify_std (GFC_STD_LEGACY
, ".XOR. operator at %C"))
958 /* Matched ".xor." - equivalent to ".neqv.". */
959 *result
= INTRINSIC_NEQV
;
973 gfc_current_locus
= orig_loc
;
978 /* Match a loop control phrase:
980 <LVALUE> = <EXPR>, <EXPR> [, <EXPR> ]
982 If the final integer expression is not present, a constant unity
983 expression is returned. We don't return MATCH_ERROR until after
984 the equals sign is seen. */
987 gfc_match_iterator (gfc_iterator
*iter
, int init_flag
)
989 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
990 gfc_expr
*var
, *e1
, *e2
, *e3
;
996 /* Match the start of an iterator without affecting the symbol table. */
998 start
= gfc_current_locus
;
999 m
= gfc_match (" %n =", name
);
1000 gfc_current_locus
= start
;
1005 m
= gfc_match_variable (&var
, 0);
1009 if (var
->symtree
->n
.sym
->attr
.dimension
)
1011 gfc_error ("Loop variable at %C cannot be an array");
1015 /* F2008, C617 & C565. */
1016 if (var
->symtree
->n
.sym
->attr
.codimension
)
1018 gfc_error ("Loop variable at %C cannot be a coarray");
1022 if (var
->ref
!= NULL
)
1024 gfc_error ("Loop variable at %C cannot be a sub-component");
1028 gfc_match_char ('=');
1030 var
->symtree
->n
.sym
->attr
.implied_index
= 1;
1032 m
= init_flag
? gfc_match_init_expr (&e1
) : gfc_match_expr (&e1
);
1035 if (m
== MATCH_ERROR
)
1038 if (gfc_match_char (',') != MATCH_YES
)
1041 m
= init_flag
? gfc_match_init_expr (&e2
) : gfc_match_expr (&e2
);
1044 if (m
== MATCH_ERROR
)
1047 if (gfc_match_char (',') != MATCH_YES
)
1049 e3
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
1053 m
= init_flag
? gfc_match_init_expr (&e3
) : gfc_match_expr (&e3
);
1054 if (m
== MATCH_ERROR
)
1058 gfc_error ("Expected a step value in iterator at %C");
1070 gfc_error ("Syntax error in iterator at %C");
1081 /* Tries to match the next non-whitespace character on the input.
1082 This subroutine does not return MATCH_ERROR. */
1085 gfc_match_char (char c
)
1089 where
= gfc_current_locus
;
1090 gfc_gobble_whitespace ();
1092 if (gfc_next_ascii_char () == c
)
1095 gfc_current_locus
= where
;
1100 /* General purpose matching subroutine. The target string is a
1101 scanf-like format string in which spaces correspond to arbitrary
1102 whitespace (including no whitespace), characters correspond to
1103 themselves. The %-codes are:
1105 %% Literal percent sign
1106 %e Expression, pointer to a pointer is set
1107 %s Symbol, pointer to the symbol is set
1108 %n Name, character buffer is set to name
1109 %t Matches end of statement.
1110 %o Matches an intrinsic operator, returned as an INTRINSIC enum.
1111 %l Matches a statement label
1112 %v Matches a variable expression (an lvalue)
1113 % Matches a required space (in free form) and optional spaces. */
1116 gfc_match (const char *target
, ...)
1118 gfc_st_label
**label
;
1127 old_loc
= gfc_current_locus
;
1128 va_start (argp
, target
);
1138 gfc_gobble_whitespace ();
1149 vp
= va_arg (argp
, void **);
1150 n
= gfc_match_expr ((gfc_expr
**) vp
);
1161 vp
= va_arg (argp
, void **);
1162 n
= gfc_match_variable ((gfc_expr
**) vp
, 0);
1173 vp
= va_arg (argp
, void **);
1174 n
= gfc_match_symbol ((gfc_symbol
**) vp
, 0);
1185 np
= va_arg (argp
, char *);
1186 n
= gfc_match_name (np
);
1197 label
= va_arg (argp
, gfc_st_label
**);
1198 n
= gfc_match_st_label (label
);
1209 ip
= va_arg (argp
, int *);
1210 n
= gfc_match_intrinsic_op ((gfc_intrinsic_op
*) ip
);
1221 if (gfc_match_eos () != MATCH_YES
)
1229 if (gfc_match_space () == MATCH_YES
)
1235 break; /* Fall through to character matcher. */
1238 gfc_internal_error ("gfc_match(): Bad match code %c", c
);
1244 /* gfc_next_ascii_char converts characters to lower-case, so we shouldn't
1245 expect an upper case character here! */
1246 gcc_assert (TOLOWER (c
) == c
);
1248 if (c
== gfc_next_ascii_char ())
1258 /* Clean up after a failed match. */
1259 gfc_current_locus
= old_loc
;
1260 va_start (argp
, target
);
1263 for (; matches
> 0; matches
--)
1265 while (*p
++ != '%');
1273 /* Matches that don't have to be undone */
1278 (void) va_arg (argp
, void **);
1283 vp
= va_arg (argp
, void **);
1284 gfc_free_expr ((struct gfc_expr
*)*vp
);
1297 /*********************** Statement level matching **********************/
1299 /* Matches the start of a program unit, which is the program keyword
1300 followed by an obligatory symbol. */
1303 gfc_match_program (void)
1308 m
= gfc_match ("% %s%t", &sym
);
1312 gfc_error ("Invalid form of PROGRAM statement at %C");
1316 if (m
== MATCH_ERROR
)
1319 if (!gfc_add_flavor (&sym
->attr
, FL_PROGRAM
, sym
->name
, NULL
))
1322 gfc_new_block
= sym
;
1328 /* Match a simple assignment statement. */
1331 gfc_match_assignment (void)
1333 gfc_expr
*lvalue
, *rvalue
;
1337 old_loc
= gfc_current_locus
;
1340 m
= gfc_match (" %v =", &lvalue
);
1343 gfc_current_locus
= old_loc
;
1344 gfc_free_expr (lvalue
);
1349 m
= gfc_match (" %e%t", &rvalue
);
1351 if (lvalue
->expr_type
== EXPR_CONSTANT
)
1353 /* This clobbers %len and %kind. */
1355 gfc_error ("Assignment to a constant expression at %C");
1360 gfc_current_locus
= old_loc
;
1361 gfc_free_expr (lvalue
);
1362 gfc_free_expr (rvalue
);
1366 gfc_set_sym_referenced (lvalue
->symtree
->n
.sym
);
1368 new_st
.op
= EXEC_ASSIGN
;
1369 new_st
.expr1
= lvalue
;
1370 new_st
.expr2
= rvalue
;
1372 gfc_check_do_variable (lvalue
->symtree
);
1374 if (lvalue
->ts
.type
== BT_CLASS
)
1375 gfc_find_vtab (&rvalue
->ts
);
1381 /* Match a pointer assignment statement. */
1384 gfc_match_pointer_assignment (void)
1386 gfc_expr
*lvalue
, *rvalue
;
1390 old_loc
= gfc_current_locus
;
1392 lvalue
= rvalue
= NULL
;
1393 gfc_matching_ptr_assignment
= 0;
1394 gfc_matching_procptr_assignment
= 0;
1396 m
= gfc_match (" %v =>", &lvalue
);
1403 if (lvalue
->symtree
->n
.sym
->attr
.proc_pointer
1404 || gfc_is_proc_ptr_comp (lvalue
))
1405 gfc_matching_procptr_assignment
= 1;
1407 gfc_matching_ptr_assignment
= 1;
1409 m
= gfc_match (" %e%t", &rvalue
);
1410 gfc_matching_ptr_assignment
= 0;
1411 gfc_matching_procptr_assignment
= 0;
1415 new_st
.op
= EXEC_POINTER_ASSIGN
;
1416 new_st
.expr1
= lvalue
;
1417 new_st
.expr2
= rvalue
;
1422 gfc_current_locus
= old_loc
;
1423 gfc_free_expr (lvalue
);
1424 gfc_free_expr (rvalue
);
1429 /* We try to match an easy arithmetic IF statement. This only happens
1430 when just after having encountered a simple IF statement. This code
1431 is really duplicate with parts of the gfc_match_if code, but this is
1435 match_arithmetic_if (void)
1437 gfc_st_label
*l1
, *l2
, *l3
;
1441 m
= gfc_match (" ( %e ) %l , %l , %l%t", &expr
, &l1
, &l2
, &l3
);
1445 if (!gfc_reference_st_label (l1
, ST_LABEL_TARGET
)
1446 || !gfc_reference_st_label (l2
, ST_LABEL_TARGET
)
1447 || !gfc_reference_st_label (l3
, ST_LABEL_TARGET
))
1449 gfc_free_expr (expr
);
1453 if (!gfc_notify_std (GFC_STD_F95_OBS
| GFC_STD_F2018_DEL
,
1454 "Arithmetic IF statement at %C"))
1457 new_st
.op
= EXEC_ARITHMETIC_IF
;
1458 new_st
.expr1
= expr
;
1467 /* The IF statement is a bit of a pain. First of all, there are three
1468 forms of it, the simple IF, the IF that starts a block and the
1471 There is a problem with the simple IF and that is the fact that we
1472 only have a single level of undo information on symbols. What this
1473 means is for a simple IF, we must re-match the whole IF statement
1474 multiple times in order to guarantee that the symbol table ends up
1475 in the proper state. */
1477 static match
match_simple_forall (void);
1478 static match
match_simple_where (void);
1481 gfc_match_if (gfc_statement
*if_type
)
1484 gfc_st_label
*l1
, *l2
, *l3
;
1485 locus old_loc
, old_loc2
;
1489 n
= gfc_match_label ();
1490 if (n
== MATCH_ERROR
)
1493 old_loc
= gfc_current_locus
;
1495 m
= gfc_match (" if ", &expr
);
1499 if (gfc_match_char ('(') != MATCH_YES
)
1501 gfc_error ("Missing %<(%> in IF-expression at %C");
1505 m
= gfc_match ("%e", &expr
);
1509 old_loc2
= gfc_current_locus
;
1510 gfc_current_locus
= old_loc
;
1512 if (gfc_match_parens () == MATCH_ERROR
)
1515 gfc_current_locus
= old_loc2
;
1517 if (gfc_match_char (')') != MATCH_YES
)
1519 gfc_error ("Syntax error in IF-expression at %C");
1520 gfc_free_expr (expr
);
1524 m
= gfc_match (" %l , %l , %l%t", &l1
, &l2
, &l3
);
1530 gfc_error ("Block label not appropriate for arithmetic IF "
1532 gfc_free_expr (expr
);
1536 if (!gfc_reference_st_label (l1
, ST_LABEL_TARGET
)
1537 || !gfc_reference_st_label (l2
, ST_LABEL_TARGET
)
1538 || !gfc_reference_st_label (l3
, ST_LABEL_TARGET
))
1540 gfc_free_expr (expr
);
1544 if (!gfc_notify_std (GFC_STD_F95_OBS
| GFC_STD_F2018_DEL
,
1545 "Arithmetic IF statement at %C"))
1548 new_st
.op
= EXEC_ARITHMETIC_IF
;
1549 new_st
.expr1
= expr
;
1554 *if_type
= ST_ARITHMETIC_IF
;
1558 if (gfc_match (" then%t") == MATCH_YES
)
1560 new_st
.op
= EXEC_IF
;
1561 new_st
.expr1
= expr
;
1562 *if_type
= ST_IF_BLOCK
;
1568 gfc_error ("Block label is not appropriate for IF statement at %C");
1569 gfc_free_expr (expr
);
1573 /* At this point the only thing left is a simple IF statement. At
1574 this point, n has to be MATCH_NO, so we don't have to worry about
1575 re-matching a block label. From what we've got so far, try
1576 matching an assignment. */
1578 *if_type
= ST_SIMPLE_IF
;
1580 m
= gfc_match_assignment ();
1584 gfc_free_expr (expr
);
1585 gfc_undo_symbols ();
1586 gfc_current_locus
= old_loc
;
1588 /* m can be MATCH_NO or MATCH_ERROR, here. For MATCH_ERROR, a mangled
1589 assignment was found. For MATCH_NO, continue to call the various
1591 if (m
== MATCH_ERROR
)
1594 gfc_match (" if ( %e ) ", &expr
); /* Guaranteed to match. */
1596 m
= gfc_match_pointer_assignment ();
1600 gfc_free_expr (expr
);
1601 gfc_undo_symbols ();
1602 gfc_current_locus
= old_loc
;
1604 gfc_match (" if ( %e ) ", &expr
); /* Guaranteed to match. */
1606 /* Look at the next keyword to see which matcher to call. Matching
1607 the keyword doesn't affect the symbol table, so we don't have to
1608 restore between tries. */
1610 #define match(string, subr, statement) \
1611 if (gfc_match (string) == MATCH_YES) { m = subr(); goto got_match; }
1615 match ("allocate", gfc_match_allocate
, ST_ALLOCATE
)
1616 match ("assign", gfc_match_assign
, ST_LABEL_ASSIGNMENT
)
1617 match ("backspace", gfc_match_backspace
, ST_BACKSPACE
)
1618 match ("call", gfc_match_call
, ST_CALL
)
1619 match ("change team", gfc_match_change_team
, ST_CHANGE_TEAM
)
1620 match ("close", gfc_match_close
, ST_CLOSE
)
1621 match ("continue", gfc_match_continue
, ST_CONTINUE
)
1622 match ("cycle", gfc_match_cycle
, ST_CYCLE
)
1623 match ("deallocate", gfc_match_deallocate
, ST_DEALLOCATE
)
1624 match ("end file", gfc_match_endfile
, ST_END_FILE
)
1625 match ("end team", gfc_match_end_team
, ST_END_TEAM
)
1626 match ("error stop", gfc_match_error_stop
, ST_ERROR_STOP
)
1627 match ("event post", gfc_match_event_post
, ST_EVENT_POST
)
1628 match ("event wait", gfc_match_event_wait
, ST_EVENT_WAIT
)
1629 match ("exit", gfc_match_exit
, ST_EXIT
)
1630 match ("fail image", gfc_match_fail_image
, ST_FAIL_IMAGE
)
1631 match ("flush", gfc_match_flush
, ST_FLUSH
)
1632 match ("forall", match_simple_forall
, ST_FORALL
)
1633 match ("form team", gfc_match_form_team
, ST_FORM_TEAM
)
1634 match ("go to", gfc_match_goto
, ST_GOTO
)
1635 match ("if", match_arithmetic_if
, ST_ARITHMETIC_IF
)
1636 match ("inquire", gfc_match_inquire
, ST_INQUIRE
)
1637 match ("lock", gfc_match_lock
, ST_LOCK
)
1638 match ("nullify", gfc_match_nullify
, ST_NULLIFY
)
1639 match ("open", gfc_match_open
, ST_OPEN
)
1640 match ("pause", gfc_match_pause
, ST_NONE
)
1641 match ("print", gfc_match_print
, ST_WRITE
)
1642 match ("read", gfc_match_read
, ST_READ
)
1643 match ("return", gfc_match_return
, ST_RETURN
)
1644 match ("rewind", gfc_match_rewind
, ST_REWIND
)
1645 match ("stop", gfc_match_stop
, ST_STOP
)
1646 match ("wait", gfc_match_wait
, ST_WAIT
)
1647 match ("sync all", gfc_match_sync_all
, ST_SYNC_CALL
);
1648 match ("sync images", gfc_match_sync_images
, ST_SYNC_IMAGES
);
1649 match ("sync memory", gfc_match_sync_memory
, ST_SYNC_MEMORY
);
1650 match ("sync team", gfc_match_sync_team
, ST_SYNC_TEAM
)
1651 match ("unlock", gfc_match_unlock
, ST_UNLOCK
)
1652 match ("where", match_simple_where
, ST_WHERE
)
1653 match ("write", gfc_match_write
, ST_WRITE
)
1656 match ("type", gfc_match_print
, ST_WRITE
)
1658 /* All else has failed, so give up. See if any of the matchers has
1659 stored an error message of some sort. */
1660 if (!gfc_error_check ())
1661 gfc_error ("Syntax error in IF-clause after %C");
1663 gfc_free_expr (expr
);
1668 gfc_error ("Syntax error in IF-clause after %C");
1671 gfc_free_expr (expr
);
1675 /* At this point, we've matched the single IF and the action clause
1676 is in new_st. Rearrange things so that the IF statement appears
1679 p
= gfc_get_code (EXEC_IF
);
1680 p
->next
= XCNEW (gfc_code
);
1682 p
->next
->loc
= gfc_current_locus
;
1686 gfc_clear_new_st ();
1688 new_st
.op
= EXEC_IF
;
1697 /* Match an ELSE statement. */
1700 gfc_match_else (void)
1702 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
1704 if (gfc_match_eos () == MATCH_YES
)
1707 if (gfc_match_name (name
) != MATCH_YES
1708 || gfc_current_block () == NULL
1709 || gfc_match_eos () != MATCH_YES
)
1711 gfc_error ("Invalid character(s) in ELSE statement after %C");
1715 if (strcmp (name
, gfc_current_block ()->name
) != 0)
1717 gfc_error ("Label %qs at %C doesn't match IF label %qs",
1718 name
, gfc_current_block ()->name
);
1726 /* Match an ELSE IF statement. */
1729 gfc_match_elseif (void)
1731 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
1732 gfc_expr
*expr
, *then
;
1736 if (gfc_match_char ('(') != MATCH_YES
)
1738 gfc_error ("Missing %<(%> in ELSE IF expression at %C");
1742 m
= gfc_match (" %e ", &expr
);
1746 if (gfc_match_char (')') != MATCH_YES
)
1748 gfc_error ("Missing %<)%> in ELSE IF expression at %C");
1752 m
= gfc_match (" then ", &then
);
1754 where
= gfc_current_locus
;
1756 if (m
== MATCH_YES
&& (gfc_match_eos () == MATCH_YES
1757 || (gfc_current_block ()
1758 && gfc_match_name (name
) == MATCH_YES
)))
1761 if (gfc_match_eos () == MATCH_YES
)
1763 gfc_error ("Missing THEN in ELSE IF statement after %L", &where
);
1767 if (gfc_match_name (name
) != MATCH_YES
1768 || gfc_current_block () == NULL
1769 || gfc_match_eos () != MATCH_YES
)
1771 gfc_error ("Syntax error in ELSE IF statement after %L", &where
);
1775 if (strcmp (name
, gfc_current_block ()->name
) != 0)
1777 gfc_error ("Label %qs after %L doesn't match IF label %qs",
1778 name
, &where
, gfc_current_block ()->name
);
1786 new_st
.op
= EXEC_IF
;
1787 new_st
.expr1
= expr
;
1791 gfc_free_expr (expr
);
1796 /* Free a gfc_iterator structure. */
1799 gfc_free_iterator (gfc_iterator
*iter
, int flag
)
1805 gfc_free_expr (iter
->var
);
1806 gfc_free_expr (iter
->start
);
1807 gfc_free_expr (iter
->end
);
1808 gfc_free_expr (iter
->step
);
1815 /* Match a CRITICAL statement. */
1817 gfc_match_critical (void)
1819 gfc_st_label
*label
= NULL
;
1821 if (gfc_match_label () == MATCH_ERROR
)
1824 if (gfc_match (" critical") != MATCH_YES
)
1827 if (gfc_match_st_label (&label
) == MATCH_ERROR
)
1830 if (gfc_match_eos () != MATCH_YES
)
1832 gfc_syntax_error (ST_CRITICAL
);
1836 if (gfc_pure (NULL
))
1838 gfc_error ("Image control statement CRITICAL at %C in PURE procedure");
1842 if (gfc_find_state (COMP_DO_CONCURRENT
))
1844 gfc_error ("Image control statement CRITICAL at %C in DO CONCURRENT "
1849 gfc_unset_implicit_pure (NULL
);
1851 if (!gfc_notify_std (GFC_STD_F2008
, "CRITICAL statement at %C"))
1854 if (flag_coarray
== GFC_FCOARRAY_NONE
)
1856 gfc_fatal_error ("Coarrays disabled at %C, use %<-fcoarray=%> to "
1861 if (gfc_find_state (COMP_CRITICAL
))
1863 gfc_error ("Nested CRITICAL block at %C");
1867 new_st
.op
= EXEC_CRITICAL
;
1870 && !gfc_reference_st_label (label
, ST_LABEL_TARGET
))
1877 /* Match a BLOCK statement. */
1880 gfc_match_block (void)
1884 if (gfc_match_label () == MATCH_ERROR
)
1887 if (gfc_match (" block") != MATCH_YES
)
1890 /* For this to be a correct BLOCK statement, the line must end now. */
1891 m
= gfc_match_eos ();
1892 if (m
== MATCH_ERROR
)
1901 /* Match an ASSOCIATE statement. */
1904 gfc_match_associate (void)
1906 if (gfc_match_label () == MATCH_ERROR
)
1909 if (gfc_match (" associate") != MATCH_YES
)
1912 /* Match the association list. */
1913 if (gfc_match_char ('(') != MATCH_YES
)
1915 gfc_error ("Expected association list at %C");
1918 new_st
.ext
.block
.assoc
= NULL
;
1921 gfc_association_list
* newAssoc
= gfc_get_association_list ();
1922 gfc_association_list
* a
;
1924 /* Match the next association. */
1925 if (gfc_match (" %n =>", newAssoc
->name
) != MATCH_YES
)
1927 gfc_error ("Expected association at %C");
1928 goto assocListError
;
1931 if (gfc_match (" %e", &newAssoc
->target
) != MATCH_YES
)
1933 /* Have another go, allowing for procedure pointer selectors. */
1934 gfc_matching_procptr_assignment
= 1;
1935 if (gfc_match (" %e", &newAssoc
->target
) != MATCH_YES
)
1937 gfc_error ("Invalid association target at %C");
1938 goto assocListError
;
1940 gfc_matching_procptr_assignment
= 0;
1942 newAssoc
->where
= gfc_current_locus
;
1944 /* Check that the current name is not yet in the list. */
1945 for (a
= new_st
.ext
.block
.assoc
; a
; a
= a
->next
)
1946 if (!strcmp (a
->name
, newAssoc
->name
))
1948 gfc_error ("Duplicate name %qs in association at %C",
1950 goto assocListError
;
1953 /* The target expression must not be coindexed. */
1954 if (gfc_is_coindexed (newAssoc
->target
))
1956 gfc_error ("Association target at %C must not be coindexed");
1957 goto assocListError
;
1960 /* The `variable' field is left blank for now; because the target is not
1961 yet resolved, we can't use gfc_has_vector_subscript to determine it
1962 for now. This is set during resolution. */
1964 /* Put it into the list. */
1965 newAssoc
->next
= new_st
.ext
.block
.assoc
;
1966 new_st
.ext
.block
.assoc
= newAssoc
;
1968 /* Try next one or end if closing parenthesis is found. */
1969 gfc_gobble_whitespace ();
1970 if (gfc_peek_char () == ')')
1972 if (gfc_match_char (',') != MATCH_YES
)
1974 gfc_error ("Expected %<)%> or %<,%> at %C");
1984 if (gfc_match_char (')') != MATCH_YES
)
1986 /* This should never happen as we peek above. */
1990 if (gfc_match_eos () != MATCH_YES
)
1992 gfc_error ("Junk after ASSOCIATE statement at %C");
1999 gfc_free_association_list (new_st
.ext
.block
.assoc
);
2004 /* Match a Fortran 2003 derived-type-spec (F03:R455), which is just the name of
2005 an accessible derived type. */
2008 match_derived_type_spec (gfc_typespec
*ts
)
2010 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
2012 gfc_symbol
*derived
, *der_type
;
2013 match m
= MATCH_YES
;
2014 gfc_actual_arglist
*decl_type_param_list
= NULL
;
2015 bool is_pdt_template
= false;
2017 old_locus
= gfc_current_locus
;
2019 if (gfc_match ("%n", name
) != MATCH_YES
)
2021 gfc_current_locus
= old_locus
;
2025 gfc_find_symbol (name
, NULL
, 1, &derived
);
2027 /* Match the PDT spec list, if there. */
2028 if (derived
&& derived
->attr
.flavor
== FL_PROCEDURE
)
2030 gfc_find_symbol (gfc_dt_upper_string (name
), NULL
, 1, &der_type
);
2031 is_pdt_template
= der_type
2032 && der_type
->attr
.flavor
== FL_DERIVED
2033 && der_type
->attr
.pdt_template
;
2036 if (is_pdt_template
)
2037 m
= gfc_match_actual_arglist (1, &decl_type_param_list
, true);
2039 if (m
== MATCH_ERROR
)
2041 gfc_free_actual_arglist (decl_type_param_list
);
2045 if (derived
&& derived
->attr
.flavor
== FL_PROCEDURE
&& derived
->attr
.generic
)
2046 derived
= gfc_find_dt_in_generic (derived
);
2048 /* If this is a PDT, find the specific instance. */
2049 if (m
== MATCH_YES
&& is_pdt_template
)
2051 gfc_namespace
*old_ns
;
2053 old_ns
= gfc_current_ns
;
2054 while (gfc_current_ns
&& gfc_current_ns
->parent
)
2055 gfc_current_ns
= gfc_current_ns
->parent
;
2057 if (type_param_spec_list
)
2058 gfc_free_actual_arglist (type_param_spec_list
);
2059 m
= gfc_get_pdt_instance (decl_type_param_list
, &der_type
,
2060 &type_param_spec_list
);
2061 gfc_free_actual_arglist (decl_type_param_list
);
2066 gcc_assert (!derived
->attr
.pdt_template
&& derived
->attr
.pdt_type
);
2067 gfc_set_sym_referenced (derived
);
2069 gfc_current_ns
= old_ns
;
2072 if (derived
&& derived
->attr
.flavor
== FL_DERIVED
)
2074 ts
->type
= BT_DERIVED
;
2075 ts
->u
.derived
= derived
;
2079 gfc_current_locus
= old_locus
;
2084 /* Match a Fortran 2003 type-spec (F03:R401). This is similar to
2085 gfc_match_decl_type_spec() from decl.c, with the following exceptions:
2086 It only includes the intrinsic types from the Fortran 2003 standard
2087 (thus, neither BYTE nor forms like REAL*4 are allowed). Additionally,
2088 the implicit_flag is not needed, so it was removed. Derived types are
2089 identified by their name alone. */
2092 gfc_match_type_spec (gfc_typespec
*ts
)
2096 char c
, name
[GFC_MAX_SYMBOL_LEN
+ 1];
2099 gfc_gobble_whitespace ();
2100 old_locus
= gfc_current_locus
;
2102 /* If c isn't [a-z], then return immediately. */
2103 c
= gfc_peek_ascii_char ();
2107 type_param_spec_list
= NULL
;
2109 if (match_derived_type_spec (ts
) == MATCH_YES
)
2111 /* Enforce F03:C401. */
2112 if (ts
->u
.derived
->attr
.abstract
)
2114 gfc_error ("Derived type %qs at %L may not be ABSTRACT",
2115 ts
->u
.derived
->name
, &old_locus
);
2121 if (gfc_match ("integer") == MATCH_YES
)
2123 ts
->type
= BT_INTEGER
;
2124 ts
->kind
= gfc_default_integer_kind
;
2128 if (gfc_match ("double precision") == MATCH_YES
)
2131 ts
->kind
= gfc_default_double_kind
;
2135 if (gfc_match ("complex") == MATCH_YES
)
2137 ts
->type
= BT_COMPLEX
;
2138 ts
->kind
= gfc_default_complex_kind
;
2142 if (gfc_match ("character") == MATCH_YES
)
2144 ts
->type
= BT_CHARACTER
;
2146 m
= gfc_match_char_spec (ts
);
2154 /* REAL is a real pain because it can be a type, intrinsic subprogram,
2155 or list item in a type-list of an OpenMP reduction clause. Need to
2156 differentiate REAL([KIND]=scalar-int-initialization-expr) from
2157 REAL(A,[KIND]) and REAL(KIND,A). Logically, when this code was
2158 written the use of LOGICAL as a type-spec or intrinsic subprogram
2161 m
= gfc_match (" %n", name
);
2163 && (strcmp (name
, "real") == 0 || strcmp (name
, "logical") == 0))
2172 ts
->kind
= gfc_default_real_kind
;
2176 ts
->type
= BT_LOGICAL
;
2177 ts
->kind
= gfc_default_logical_kind
;
2180 gfc_gobble_whitespace ();
2182 /* Prevent REAL*4, etc. */
2183 c
= gfc_peek_ascii_char ();
2186 gfc_error ("Invalid type-spec at %C");
2190 /* Found leading colon in REAL::, a trailing ')' in for example
2191 TYPE IS (REAL), or REAL, for an OpenMP list-item. */
2192 if (c
== ':' || c
== ')' || (flag_openmp
&& c
== ','))
2195 /* Found something other than the opening '(' in REAL(... */
2199 gfc_next_char (); /* Burn the '('. */
2201 /* Look for the optional KIND=. */
2202 where
= gfc_current_locus
;
2203 m
= gfc_match ("%n", name
);
2206 gfc_gobble_whitespace ();
2207 c
= gfc_next_char ();
2210 if (strcmp(name
, "a") == 0 || strcmp(name
, "l") == 0)
2212 else if (strcmp(name
, "kind") == 0)
2218 gfc_current_locus
= where
;
2221 gfc_current_locus
= where
;
2225 m
= gfc_match_init_expr (&e
);
2226 if (m
== MATCH_NO
|| m
== MATCH_ERROR
)
2229 /* If a comma appears, it is an intrinsic subprogram. */
2230 gfc_gobble_whitespace ();
2231 c
= gfc_peek_ascii_char ();
2238 /* If ')' appears, we have REAL(initialization-expr), here check for
2239 a scalar integer initialization-expr and valid kind parameter. */
2242 if (e
->ts
.type
!= BT_INTEGER
|| e
->rank
> 0)
2248 if (e
->expr_type
!= EXPR_CONSTANT
)
2251 gfc_next_char (); /* Burn the ')'. */
2252 ts
->kind
= (int) mpz_get_si (e
->value
.integer
);
2253 if (gfc_validate_kind (ts
->type
, ts
->kind
, true) == -1)
2255 gfc_error ("Invalid type-spec at %C");
2267 /* If a type is not matched, simply return MATCH_NO. */
2268 gfc_current_locus
= old_locus
;
2273 gfc_gobble_whitespace ();
2275 /* This prevents INTEGER*4, etc. */
2276 if (gfc_peek_ascii_char () == '*')
2278 gfc_error ("Invalid type-spec at %C");
2282 m
= gfc_match_kind_spec (ts
, false);
2284 /* No kind specifier found. */
2292 /******************** FORALL subroutines ********************/
2294 /* Free a list of FORALL iterators. */
2297 gfc_free_forall_iterator (gfc_forall_iterator
*iter
)
2299 gfc_forall_iterator
*next
;
2304 gfc_free_expr (iter
->var
);
2305 gfc_free_expr (iter
->start
);
2306 gfc_free_expr (iter
->end
);
2307 gfc_free_expr (iter
->stride
);
2314 /* Match an iterator as part of a FORALL statement. The format is:
2316 <var> = <start>:<end>[:<stride>]
2318 On MATCH_NO, the caller tests for the possibility that there is a
2319 scalar mask expression. */
2322 match_forall_iterator (gfc_forall_iterator
**result
)
2324 gfc_forall_iterator
*iter
;
2328 where
= gfc_current_locus
;
2329 iter
= XCNEW (gfc_forall_iterator
);
2331 m
= gfc_match_expr (&iter
->var
);
2335 if (gfc_match_char ('=') != MATCH_YES
2336 || iter
->var
->expr_type
!= EXPR_VARIABLE
)
2342 m
= gfc_match_expr (&iter
->start
);
2346 if (gfc_match_char (':') != MATCH_YES
)
2349 m
= gfc_match_expr (&iter
->end
);
2352 if (m
== MATCH_ERROR
)
2355 if (gfc_match_char (':') == MATCH_NO
)
2356 iter
->stride
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
2359 m
= gfc_match_expr (&iter
->stride
);
2362 if (m
== MATCH_ERROR
)
2366 /* Mark the iteration variable's symbol as used as a FORALL index. */
2367 iter
->var
->symtree
->n
.sym
->forall_index
= true;
2373 gfc_error ("Syntax error in FORALL iterator at %C");
2378 gfc_current_locus
= where
;
2379 gfc_free_forall_iterator (iter
);
2384 /* Match the header of a FORALL statement. */
2387 match_forall_header (gfc_forall_iterator
**phead
, gfc_expr
**mask
)
2389 gfc_forall_iterator
*head
, *tail
, *new_iter
;
2393 gfc_gobble_whitespace ();
2398 if (gfc_match_char ('(') != MATCH_YES
)
2401 m
= match_forall_iterator (&new_iter
);
2402 if (m
== MATCH_ERROR
)
2407 head
= tail
= new_iter
;
2411 if (gfc_match_char (',') != MATCH_YES
)
2414 m
= match_forall_iterator (&new_iter
);
2415 if (m
== MATCH_ERROR
)
2420 tail
->next
= new_iter
;
2425 /* Have to have a mask expression. */
2427 m
= gfc_match_expr (&msk
);
2430 if (m
== MATCH_ERROR
)
2436 if (gfc_match_char (')') == MATCH_NO
)
2444 gfc_syntax_error (ST_FORALL
);
2447 gfc_free_expr (msk
);
2448 gfc_free_forall_iterator (head
);
2453 /* Match the rest of a simple FORALL statement that follows an
2457 match_simple_forall (void)
2459 gfc_forall_iterator
*head
;
2468 m
= match_forall_header (&head
, &mask
);
2475 m
= gfc_match_assignment ();
2477 if (m
== MATCH_ERROR
)
2481 m
= gfc_match_pointer_assignment ();
2482 if (m
== MATCH_ERROR
)
2488 c
= XCNEW (gfc_code
);
2490 c
->loc
= gfc_current_locus
;
2492 if (gfc_match_eos () != MATCH_YES
)
2495 gfc_clear_new_st ();
2496 new_st
.op
= EXEC_FORALL
;
2497 new_st
.expr1
= mask
;
2498 new_st
.ext
.forall_iterator
= head
;
2499 new_st
.block
= gfc_get_code (EXEC_FORALL
);
2500 new_st
.block
->next
= c
;
2505 gfc_syntax_error (ST_FORALL
);
2508 gfc_free_forall_iterator (head
);
2509 gfc_free_expr (mask
);
2515 /* Match a FORALL statement. */
2518 gfc_match_forall (gfc_statement
*st
)
2520 gfc_forall_iterator
*head
;
2529 m0
= gfc_match_label ();
2530 if (m0
== MATCH_ERROR
)
2533 m
= gfc_match (" forall");
2537 m
= match_forall_header (&head
, &mask
);
2538 if (m
== MATCH_ERROR
)
2543 if (gfc_match_eos () == MATCH_YES
)
2545 *st
= ST_FORALL_BLOCK
;
2546 new_st
.op
= EXEC_FORALL
;
2547 new_st
.expr1
= mask
;
2548 new_st
.ext
.forall_iterator
= head
;
2552 m
= gfc_match_assignment ();
2553 if (m
== MATCH_ERROR
)
2557 m
= gfc_match_pointer_assignment ();
2558 if (m
== MATCH_ERROR
)
2564 c
= XCNEW (gfc_code
);
2566 c
->loc
= gfc_current_locus
;
2568 gfc_clear_new_st ();
2569 new_st
.op
= EXEC_FORALL
;
2570 new_st
.expr1
= mask
;
2571 new_st
.ext
.forall_iterator
= head
;
2572 new_st
.block
= gfc_get_code (EXEC_FORALL
);
2573 new_st
.block
->next
= c
;
2579 gfc_syntax_error (ST_FORALL
);
2582 gfc_free_forall_iterator (head
);
2583 gfc_free_expr (mask
);
2584 gfc_free_statements (c
);
2589 /* Match a DO statement. */
2594 gfc_iterator iter
, *ip
;
2596 gfc_st_label
*label
;
2599 old_loc
= gfc_current_locus
;
2601 memset (&iter
, '\0', sizeof (gfc_iterator
));
2604 m
= gfc_match_label ();
2605 if (m
== MATCH_ERROR
)
2608 if (gfc_match (" do") != MATCH_YES
)
2611 m
= gfc_match_st_label (&label
);
2612 if (m
== MATCH_ERROR
)
2615 /* Match an infinite DO, make it like a DO WHILE(.TRUE.). */
2617 if (gfc_match_eos () == MATCH_YES
)
2619 iter
.end
= gfc_get_logical_expr (gfc_default_logical_kind
, NULL
, true);
2620 new_st
.op
= EXEC_DO_WHILE
;
2624 /* Match an optional comma, if no comma is found, a space is obligatory. */
2625 if (gfc_match_char (',') != MATCH_YES
&& gfc_match ("% ") != MATCH_YES
)
2628 /* Check for balanced parens. */
2630 if (gfc_match_parens () == MATCH_ERROR
)
2633 if (gfc_match (" concurrent") == MATCH_YES
)
2635 gfc_forall_iterator
*head
;
2638 if (!gfc_notify_std (GFC_STD_F2008
, "DO CONCURRENT construct at %C"))
2644 m
= match_forall_header (&head
, &mask
);
2648 if (m
== MATCH_ERROR
)
2649 goto concurr_cleanup
;
2651 if (gfc_match_eos () != MATCH_YES
)
2652 goto concurr_cleanup
;
2655 && !gfc_reference_st_label (label
, ST_LABEL_DO_TARGET
))
2656 goto concurr_cleanup
;
2658 new_st
.label1
= label
;
2659 new_st
.op
= EXEC_DO_CONCURRENT
;
2660 new_st
.expr1
= mask
;
2661 new_st
.ext
.forall_iterator
= head
;
2666 gfc_syntax_error (ST_DO
);
2667 gfc_free_expr (mask
);
2668 gfc_free_forall_iterator (head
);
2672 /* See if we have a DO WHILE. */
2673 if (gfc_match (" while ( %e )%t", &iter
.end
) == MATCH_YES
)
2675 new_st
.op
= EXEC_DO_WHILE
;
2679 /* The abortive DO WHILE may have done something to the symbol
2680 table, so we start over. */
2681 gfc_undo_symbols ();
2682 gfc_current_locus
= old_loc
;
2684 gfc_match_label (); /* This won't error. */
2685 gfc_match (" do "); /* This will work. */
2687 gfc_match_st_label (&label
); /* Can't error out. */
2688 gfc_match_char (','); /* Optional comma. */
2690 m
= gfc_match_iterator (&iter
, 0);
2693 if (m
== MATCH_ERROR
)
2696 iter
.var
->symtree
->n
.sym
->attr
.implied_index
= 0;
2697 gfc_check_do_variable (iter
.var
->symtree
);
2699 if (gfc_match_eos () != MATCH_YES
)
2701 gfc_syntax_error (ST_DO
);
2705 new_st
.op
= EXEC_DO
;
2709 && !gfc_reference_st_label (label
, ST_LABEL_DO_TARGET
))
2712 new_st
.label1
= label
;
2714 if (new_st
.op
== EXEC_DO_WHILE
)
2715 new_st
.expr1
= iter
.end
;
2718 new_st
.ext
.iterator
= ip
= gfc_get_iterator ();
2725 gfc_free_iterator (&iter
, 0);
2731 /* Match an EXIT or CYCLE statement. */
2734 match_exit_cycle (gfc_statement st
, gfc_exec_op op
)
2736 gfc_state_data
*p
, *o
;
2741 if (gfc_match_eos () == MATCH_YES
)
2745 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
2748 m
= gfc_match ("% %n%t", name
);
2749 if (m
== MATCH_ERROR
)
2753 gfc_syntax_error (st
);
2757 /* Find the corresponding symbol. If there's a BLOCK statement
2758 between here and the label, it is not in gfc_current_ns but a parent
2760 stree
= gfc_find_symtree_in_proc (name
, gfc_current_ns
);
2763 gfc_error ("Name %qs in %s statement at %C is unknown",
2764 name
, gfc_ascii_statement (st
));
2769 if (sym
->attr
.flavor
!= FL_LABEL
)
2771 gfc_error ("Name %qs in %s statement at %C is not a construct name",
2772 name
, gfc_ascii_statement (st
));
2777 /* Find the loop specified by the label (or lack of a label). */
2778 for (o
= NULL
, p
= gfc_state_stack
; p
; p
= p
->previous
)
2779 if (o
== NULL
&& p
->state
== COMP_OMP_STRUCTURED_BLOCK
)
2781 else if (p
->state
== COMP_CRITICAL
)
2783 gfc_error("%s statement at %C leaves CRITICAL construct",
2784 gfc_ascii_statement (st
));
2787 else if (p
->state
== COMP_DO_CONCURRENT
2788 && (op
== EXEC_EXIT
|| (sym
&& sym
!= p
->sym
)))
2790 /* F2008, C821 & C845. */
2791 gfc_error("%s statement at %C leaves DO CONCURRENT construct",
2792 gfc_ascii_statement (st
));
2795 else if ((sym
&& sym
== p
->sym
)
2796 || (!sym
&& (p
->state
== COMP_DO
2797 || p
->state
== COMP_DO_CONCURRENT
)))
2803 gfc_error ("%s statement at %C is not within a construct",
2804 gfc_ascii_statement (st
));
2806 gfc_error ("%s statement at %C is not within construct %qs",
2807 gfc_ascii_statement (st
), sym
->name
);
2812 /* Special checks for EXIT from non-loop constructs. */
2816 case COMP_DO_CONCURRENT
:
2820 /* This is already handled above. */
2823 case COMP_ASSOCIATE
:
2827 case COMP_SELECT_TYPE
:
2829 if (op
== EXEC_CYCLE
)
2831 gfc_error ("CYCLE statement at %C is not applicable to non-loop"
2832 " construct %qs", sym
->name
);
2835 gcc_assert (op
== EXEC_EXIT
);
2836 if (!gfc_notify_std (GFC_STD_F2008
, "EXIT statement with no"
2837 " do-construct-name at %C"))
2842 gfc_error ("%s statement at %C is not applicable to construct %qs",
2843 gfc_ascii_statement (st
), sym
->name
);
2849 gfc_error (is_oacc (p
)
2850 ? G_("%s statement at %C leaving OpenACC structured block")
2851 : G_("%s statement at %C leaving OpenMP structured block"),
2852 gfc_ascii_statement (st
));
2856 for (o
= p
, cnt
= 0; o
->state
== COMP_DO
&& o
->previous
!= NULL
; cnt
++)
2860 && o
->state
== COMP_OMP_STRUCTURED_BLOCK
2861 && (o
->head
->op
== EXEC_OACC_LOOP
2862 || o
->head
->op
== EXEC_OACC_PARALLEL_LOOP
))
2865 gcc_assert (o
->head
->next
!= NULL
2866 && (o
->head
->next
->op
== EXEC_DO
2867 || o
->head
->next
->op
== EXEC_DO_WHILE
)
2868 && o
->previous
!= NULL
2869 && o
->previous
->tail
->op
== o
->head
->op
);
2870 if (o
->previous
->tail
->ext
.omp_clauses
!= NULL
2871 && o
->previous
->tail
->ext
.omp_clauses
->collapse
> 1)
2872 collapse
= o
->previous
->tail
->ext
.omp_clauses
->collapse
;
2873 if (st
== ST_EXIT
&& cnt
<= collapse
)
2875 gfc_error ("EXIT statement at %C terminating !$ACC LOOP loop");
2878 if (st
== ST_CYCLE
&& cnt
< collapse
)
2880 gfc_error ("CYCLE statement at %C to non-innermost collapsed"
2881 " !$ACC LOOP loop");
2887 && (o
->state
== COMP_OMP_STRUCTURED_BLOCK
)
2888 && (o
->head
->op
== EXEC_OMP_DO
2889 || o
->head
->op
== EXEC_OMP_PARALLEL_DO
2890 || o
->head
->op
== EXEC_OMP_SIMD
2891 || o
->head
->op
== EXEC_OMP_DO_SIMD
2892 || o
->head
->op
== EXEC_OMP_PARALLEL_DO_SIMD
))
2895 gcc_assert (o
->head
->next
!= NULL
2896 && (o
->head
->next
->op
== EXEC_DO
2897 || o
->head
->next
->op
== EXEC_DO_WHILE
)
2898 && o
->previous
!= NULL
2899 && o
->previous
->tail
->op
== o
->head
->op
);
2900 if (o
->previous
->tail
->ext
.omp_clauses
!= NULL
)
2902 if (o
->previous
->tail
->ext
.omp_clauses
->collapse
> 1)
2903 count
= o
->previous
->tail
->ext
.omp_clauses
->collapse
;
2904 if (o
->previous
->tail
->ext
.omp_clauses
->orderedc
)
2905 count
= o
->previous
->tail
->ext
.omp_clauses
->orderedc
;
2907 if (st
== ST_EXIT
&& cnt
<= count
)
2909 gfc_error ("EXIT statement at %C terminating !$OMP DO loop");
2912 if (st
== ST_CYCLE
&& cnt
< count
)
2914 gfc_error ("CYCLE statement at %C to non-innermost collapsed"
2920 /* Save the first statement in the construct - needed by the backend. */
2921 new_st
.ext
.which_construct
= p
->construct
;
2929 /* Match the EXIT statement. */
2932 gfc_match_exit (void)
2934 return match_exit_cycle (ST_EXIT
, EXEC_EXIT
);
2938 /* Match the CYCLE statement. */
2941 gfc_match_cycle (void)
2943 return match_exit_cycle (ST_CYCLE
, EXEC_CYCLE
);
2947 /* Match a stop-code after an (ERROR) STOP or PAUSE statement. The
2948 requirements for a stop-code differ in the standards.
2952 R840 stop-stmt is STOP [ stop-code ]
2953 R841 stop-code is scalar-char-constant
2954 or digit [ digit [ digit [ digit [ digit ] ] ] ]
2956 Fortran 2003 matches Fortran 95 except R840 and R841 are now R849 and R850.
2959 R855 stop-stmt is STOP [ stop-code ]
2960 R856 allstop-stmt is ALL STOP [ stop-code ]
2961 R857 stop-code is scalar-default-char-constant-expr
2962 or scalar-int-constant-expr
2964 For free-form source code, all standards contain a statement of the form:
2966 A blank shall be used to separate names, constants, or labels from
2967 adjacent keywords, names, constants, or labels.
2969 A stop-code is not a name, constant, or label. So, under Fortran 95 and 2003,
2973 is valid, but it is invalid Fortran 2008. */
2976 gfc_match_stopcode (gfc_statement st
)
2982 /* Set f95 for -std=f95. */
2983 f95
= (gfc_option
.allow_std
== GFC_STD_OPT_F95
);
2985 /* Set f03 for -std=f2003. */
2986 f03
= (gfc_option
.allow_std
== GFC_STD_OPT_F03
);
2988 /* Set f08 for -std=f2008. */
2989 f08
= (gfc_option
.allow_std
== GFC_STD_OPT_F08
);
2991 /* Look for a blank between STOP and the stop-code for F2008 or later. */
2992 if (gfc_current_form
!= FORM_FIXED
&& !(f95
|| f03
))
2994 char c
= gfc_peek_ascii_char ();
2996 /* Look for end-of-statement. There is no stop-code. */
2997 if (c
== '\n' || c
== '!' || c
== ';')
3002 gfc_error ("Blank required in %s statement near %C",
3003 gfc_ascii_statement (st
));
3008 if (gfc_match_eos () != MATCH_YES
)
3013 /* First look for the F95 or F2003 digit [...] construct. */
3014 old_locus
= gfc_current_locus
;
3015 m
= gfc_match_small_int (&stopcode
);
3016 if (m
== MATCH_YES
&& (f95
|| f03
))
3020 gfc_error ("STOP code at %C cannot be negative");
3024 if (stopcode
> 99999)
3026 gfc_error ("STOP code at %C contains too many digits");
3031 /* Reset the locus and now load gfc_expr. */
3032 gfc_current_locus
= old_locus
;
3033 m
= gfc_match_expr (&e
);
3034 if (m
== MATCH_ERROR
)
3039 if (gfc_match_eos () != MATCH_YES
)
3043 if (gfc_pure (NULL
))
3045 if (st
== ST_ERROR_STOP
)
3047 if (!gfc_notify_std (GFC_STD_F2018
, "%s statement at %C in PURE "
3048 "procedure", gfc_ascii_statement (st
)))
3053 gfc_error ("%s statement not allowed in PURE procedure at %C",
3054 gfc_ascii_statement (st
));
3059 gfc_unset_implicit_pure (NULL
);
3061 if (st
== ST_STOP
&& gfc_find_state (COMP_CRITICAL
))
3063 gfc_error ("Image control statement STOP at %C in CRITICAL block");
3066 if (st
== ST_STOP
&& gfc_find_state (COMP_DO_CONCURRENT
))
3068 gfc_error ("Image control statement STOP at %C in DO CONCURRENT block");
3074 gfc_simplify_expr (e
, 0);
3076 /* Test for F95 and F2003 style STOP stop-code. */
3077 if (e
->expr_type
!= EXPR_CONSTANT
&& (f95
|| f03
))
3079 gfc_error ("STOP code at %L must be a scalar CHARACTER constant "
3080 "or digit[digit[digit[digit[digit]]]]", &e
->where
);
3084 /* Use the machinery for an initialization expression to reduce the
3085 stop-code to a constant. */
3086 gfc_init_expr_flag
= true;
3087 gfc_reduce_init_expr (e
);
3088 gfc_init_expr_flag
= false;
3090 /* Test for F2008 style STOP stop-code. */
3091 if (e
->expr_type
!= EXPR_CONSTANT
&& f08
)
3093 gfc_error ("STOP code at %L must be a scalar default CHARACTER or "
3094 "INTEGER constant expression", &e
->where
);
3098 if (!(e
->ts
.type
== BT_CHARACTER
|| e
->ts
.type
== BT_INTEGER
))
3100 gfc_error ("STOP code at %L must be either INTEGER or CHARACTER type",
3107 gfc_error ("STOP code at %L must be scalar", &e
->where
);
3111 if (e
->ts
.type
== BT_CHARACTER
3112 && e
->ts
.kind
!= gfc_default_character_kind
)
3114 gfc_error ("STOP code at %L must be default character KIND=%d",
3115 &e
->where
, (int) gfc_default_character_kind
);
3119 if (e
->ts
.type
== BT_INTEGER
&& e
->ts
.kind
!= gfc_default_integer_kind
)
3121 gfc_error ("STOP code at %L must be default integer KIND=%d",
3122 &e
->where
, (int) gfc_default_integer_kind
);
3132 new_st
.op
= EXEC_STOP
;
3135 new_st
.op
= EXEC_ERROR_STOP
;
3138 new_st
.op
= EXEC_PAUSE
;
3145 new_st
.ext
.stop_code
= -1;
3150 gfc_syntax_error (st
);
3159 /* Match the (deprecated) PAUSE statement. */
3162 gfc_match_pause (void)
3166 m
= gfc_match_stopcode (ST_PAUSE
);
3169 if (!gfc_notify_std (GFC_STD_F95_DEL
, "PAUSE statement at %C"))
3176 /* Match the STOP statement. */
3179 gfc_match_stop (void)
3181 return gfc_match_stopcode (ST_STOP
);
3185 /* Match the ERROR STOP statement. */
3188 gfc_match_error_stop (void)
3190 if (!gfc_notify_std (GFC_STD_F2008
, "ERROR STOP statement at %C"))
3193 return gfc_match_stopcode (ST_ERROR_STOP
);
3196 /* Match EVENT POST/WAIT statement. Syntax:
3197 EVENT POST ( event-variable [, sync-stat-list] )
3198 EVENT WAIT ( event-variable [, wait-spec-list] )
3200 wait-spec-list is sync-stat-list or until-spec
3201 until-spec is UNTIL_COUNT = scalar-int-expr
3202 sync-stat is STAT= or ERRMSG=. */
3205 event_statement (gfc_statement st
)
3208 gfc_expr
*tmp
, *eventvar
, *until_count
, *stat
, *errmsg
;
3209 bool saw_until_count
, saw_stat
, saw_errmsg
;
3211 tmp
= eventvar
= until_count
= stat
= errmsg
= NULL
;
3212 saw_until_count
= saw_stat
= saw_errmsg
= false;
3214 if (gfc_pure (NULL
))
3216 gfc_error ("Image control statement EVENT %s at %C in PURE procedure",
3217 st
== ST_EVENT_POST
? "POST" : "WAIT");
3221 gfc_unset_implicit_pure (NULL
);
3223 if (flag_coarray
== GFC_FCOARRAY_NONE
)
3225 gfc_fatal_error ("Coarrays disabled at %C, use %<-fcoarray=%> to enable");
3229 if (gfc_find_state (COMP_CRITICAL
))
3231 gfc_error ("Image control statement EVENT %s at %C in CRITICAL block",
3232 st
== ST_EVENT_POST
? "POST" : "WAIT");
3236 if (gfc_find_state (COMP_DO_CONCURRENT
))
3238 gfc_error ("Image control statement EVENT %s at %C in DO CONCURRENT "
3239 "block", st
== ST_EVENT_POST
? "POST" : "WAIT");
3243 if (gfc_match_char ('(') != MATCH_YES
)
3246 if (gfc_match ("%e", &eventvar
) != MATCH_YES
)
3248 m
= gfc_match_char (',');
3249 if (m
== MATCH_ERROR
)
3253 m
= gfc_match_char (')');
3261 m
= gfc_match (" stat = %v", &tmp
);
3262 if (m
== MATCH_ERROR
)
3268 gfc_error ("Redundant STAT tag found at %L", &tmp
->where
);
3274 m
= gfc_match_char (',');
3282 m
= gfc_match (" errmsg = %v", &tmp
);
3283 if (m
== MATCH_ERROR
)
3289 gfc_error ("Redundant ERRMSG tag found at %L", &tmp
->where
);
3295 m
= gfc_match_char (',');
3303 m
= gfc_match (" until_count = %e", &tmp
);
3304 if (m
== MATCH_ERROR
|| st
== ST_EVENT_POST
)
3308 if (saw_until_count
)
3310 gfc_error ("Redundant UNTIL_COUNT tag found at %L",
3315 saw_until_count
= true;
3317 m
= gfc_match_char (',');
3328 if (m
== MATCH_ERROR
)
3331 if (gfc_match (" )%t") != MATCH_YES
)
3338 new_st
.op
= EXEC_EVENT_POST
;
3341 new_st
.op
= EXEC_EVENT_WAIT
;
3347 new_st
.expr1
= eventvar
;
3348 new_st
.expr2
= stat
;
3349 new_st
.expr3
= errmsg
;
3350 new_st
.expr4
= until_count
;
3355 gfc_syntax_error (st
);
3358 if (until_count
!= tmp
)
3359 gfc_free_expr (until_count
);
3361 gfc_free_expr (errmsg
);
3363 gfc_free_expr (stat
);
3365 gfc_free_expr (tmp
);
3366 gfc_free_expr (eventvar
);
3374 gfc_match_event_post (void)
3376 if (!gfc_notify_std (GFC_STD_F2018
, "EVENT POST statement at %C"))
3379 return event_statement (ST_EVENT_POST
);
3384 gfc_match_event_wait (void)
3386 if (!gfc_notify_std (GFC_STD_F2018
, "EVENT WAIT statement at %C"))
3389 return event_statement (ST_EVENT_WAIT
);
3393 /* Match a FAIL IMAGE statement. */
3396 gfc_match_fail_image (void)
3398 if (!gfc_notify_std (GFC_STD_F2018
, "FAIL IMAGE statement at %C"))
3401 if (gfc_match_char ('(') == MATCH_YES
)
3404 new_st
.op
= EXEC_FAIL_IMAGE
;
3409 gfc_syntax_error (ST_FAIL_IMAGE
);
3414 /* Match a FORM TEAM statement. */
3417 gfc_match_form_team (void)
3420 gfc_expr
*teamid
,*team
;
3422 if (!gfc_notify_std (GFC_STD_F2018
, "FORM TEAM statement at %C"))
3425 if (gfc_match_char ('(') == MATCH_NO
)
3428 new_st
.op
= EXEC_FORM_TEAM
;
3430 if (gfc_match ("%e", &teamid
) != MATCH_YES
)
3432 m
= gfc_match_char (',');
3433 if (m
== MATCH_ERROR
)
3435 if (gfc_match ("%e", &team
) != MATCH_YES
)
3438 m
= gfc_match_char (')');
3442 new_st
.expr1
= teamid
;
3443 new_st
.expr2
= team
;
3448 gfc_syntax_error (ST_FORM_TEAM
);
3453 /* Match a CHANGE TEAM statement. */
3456 gfc_match_change_team (void)
3461 if (!gfc_notify_std (GFC_STD_F2018
, "CHANGE TEAM statement at %C"))
3464 if (gfc_match_char ('(') == MATCH_NO
)
3467 new_st
.op
= EXEC_CHANGE_TEAM
;
3469 if (gfc_match ("%e", &team
) != MATCH_YES
)
3472 m
= gfc_match_char (')');
3476 new_st
.expr1
= team
;
3481 gfc_syntax_error (ST_CHANGE_TEAM
);
3486 /* Match a END TEAM statement. */
3489 gfc_match_end_team (void)
3491 if (!gfc_notify_std (GFC_STD_F2018
, "END TEAM statement at %C"))
3494 if (gfc_match_char ('(') == MATCH_YES
)
3497 new_st
.op
= EXEC_END_TEAM
;
3502 gfc_syntax_error (ST_END_TEAM
);
3507 /* Match a SYNC TEAM statement. */
3510 gfc_match_sync_team (void)
3515 if (!gfc_notify_std (GFC_STD_F2018
, "SYNC TEAM statement at %C"))
3518 if (gfc_match_char ('(') == MATCH_NO
)
3521 new_st
.op
= EXEC_SYNC_TEAM
;
3523 if (gfc_match ("%e", &team
) != MATCH_YES
)
3526 m
= gfc_match_char (')');
3530 new_st
.expr1
= team
;
3535 gfc_syntax_error (ST_SYNC_TEAM
);
3540 /* Match LOCK/UNLOCK statement. Syntax:
3541 LOCK ( lock-variable [ , lock-stat-list ] )
3542 UNLOCK ( lock-variable [ , sync-stat-list ] )
3543 where lock-stat is ACQUIRED_LOCK or sync-stat
3544 and sync-stat is STAT= or ERRMSG=. */
3547 lock_unlock_statement (gfc_statement st
)
3550 gfc_expr
*tmp
, *lockvar
, *acq_lock
, *stat
, *errmsg
;
3551 bool saw_acq_lock
, saw_stat
, saw_errmsg
;
3553 tmp
= lockvar
= acq_lock
= stat
= errmsg
= NULL
;
3554 saw_acq_lock
= saw_stat
= saw_errmsg
= false;
3556 if (gfc_pure (NULL
))
3558 gfc_error ("Image control statement %s at %C in PURE procedure",
3559 st
== ST_LOCK
? "LOCK" : "UNLOCK");
3563 gfc_unset_implicit_pure (NULL
);
3565 if (flag_coarray
== GFC_FCOARRAY_NONE
)
3567 gfc_fatal_error ("Coarrays disabled at %C, use %<-fcoarray=%> to enable");
3571 if (gfc_find_state (COMP_CRITICAL
))
3573 gfc_error ("Image control statement %s at %C in CRITICAL block",
3574 st
== ST_LOCK
? "LOCK" : "UNLOCK");
3578 if (gfc_find_state (COMP_DO_CONCURRENT
))
3580 gfc_error ("Image control statement %s at %C in DO CONCURRENT block",
3581 st
== ST_LOCK
? "LOCK" : "UNLOCK");
3585 if (gfc_match_char ('(') != MATCH_YES
)
3588 if (gfc_match ("%e", &lockvar
) != MATCH_YES
)
3590 m
= gfc_match_char (',');
3591 if (m
== MATCH_ERROR
)
3595 m
= gfc_match_char (')');
3603 m
= gfc_match (" stat = %v", &tmp
);
3604 if (m
== MATCH_ERROR
)
3610 gfc_error ("Redundant STAT tag found at %L", &tmp
->where
);
3616 m
= gfc_match_char (',');
3624 m
= gfc_match (" errmsg = %v", &tmp
);
3625 if (m
== MATCH_ERROR
)
3631 gfc_error ("Redundant ERRMSG tag found at %L", &tmp
->where
);
3637 m
= gfc_match_char (',');
3645 m
= gfc_match (" acquired_lock = %v", &tmp
);
3646 if (m
== MATCH_ERROR
|| st
== ST_UNLOCK
)
3652 gfc_error ("Redundant ACQUIRED_LOCK tag found at %L",
3657 saw_acq_lock
= true;
3659 m
= gfc_match_char (',');
3670 if (m
== MATCH_ERROR
)
3673 if (gfc_match (" )%t") != MATCH_YES
)
3680 new_st
.op
= EXEC_LOCK
;
3683 new_st
.op
= EXEC_UNLOCK
;
3689 new_st
.expr1
= lockvar
;
3690 new_st
.expr2
= stat
;
3691 new_st
.expr3
= errmsg
;
3692 new_st
.expr4
= acq_lock
;
3697 gfc_syntax_error (st
);
3700 if (acq_lock
!= tmp
)
3701 gfc_free_expr (acq_lock
);
3703 gfc_free_expr (errmsg
);
3705 gfc_free_expr (stat
);
3707 gfc_free_expr (tmp
);
3708 gfc_free_expr (lockvar
);
3715 gfc_match_lock (void)
3717 if (!gfc_notify_std (GFC_STD_F2008
, "LOCK statement at %C"))
3720 return lock_unlock_statement (ST_LOCK
);
3725 gfc_match_unlock (void)
3727 if (!gfc_notify_std (GFC_STD_F2008
, "UNLOCK statement at %C"))
3730 return lock_unlock_statement (ST_UNLOCK
);
3734 /* Match SYNC ALL/IMAGES/MEMORY statement. Syntax:
3735 SYNC ALL [(sync-stat-list)]
3736 SYNC MEMORY [(sync-stat-list)]
3737 SYNC IMAGES (image-set [, sync-stat-list] )
3738 with sync-stat is int-expr or *. */
3741 sync_statement (gfc_statement st
)
3744 gfc_expr
*tmp
, *imageset
, *stat
, *errmsg
;
3745 bool saw_stat
, saw_errmsg
;
3747 tmp
= imageset
= stat
= errmsg
= NULL
;
3748 saw_stat
= saw_errmsg
= false;
3750 if (gfc_pure (NULL
))
3752 gfc_error ("Image control statement SYNC at %C in PURE procedure");
3756 gfc_unset_implicit_pure (NULL
);
3758 if (!gfc_notify_std (GFC_STD_F2008
, "SYNC statement at %C"))
3761 if (flag_coarray
== GFC_FCOARRAY_NONE
)
3763 gfc_fatal_error ("Coarrays disabled at %C, use %<-fcoarray=%> to "
3768 if (gfc_find_state (COMP_CRITICAL
))
3770 gfc_error ("Image control statement SYNC at %C in CRITICAL block");
3774 if (gfc_find_state (COMP_DO_CONCURRENT
))
3776 gfc_error ("Image control statement SYNC at %C in DO CONCURRENT block");
3780 if (gfc_match_eos () == MATCH_YES
)
3782 if (st
== ST_SYNC_IMAGES
)
3787 if (gfc_match_char ('(') != MATCH_YES
)
3790 if (st
== ST_SYNC_IMAGES
)
3792 /* Denote '*' as imageset == NULL. */
3793 m
= gfc_match_char ('*');
3794 if (m
== MATCH_ERROR
)
3798 if (gfc_match ("%e", &imageset
) != MATCH_YES
)
3801 m
= gfc_match_char (',');
3802 if (m
== MATCH_ERROR
)
3806 m
= gfc_match_char (')');
3815 m
= gfc_match (" stat = %v", &tmp
);
3816 if (m
== MATCH_ERROR
)
3822 gfc_error ("Redundant STAT tag found at %L", &tmp
->where
);
3828 if (gfc_match_char (',') == MATCH_YES
)
3835 m
= gfc_match (" errmsg = %v", &tmp
);
3836 if (m
== MATCH_ERROR
)
3842 gfc_error ("Redundant ERRMSG tag found at %L", &tmp
->where
);
3848 if (gfc_match_char (',') == MATCH_YES
)
3858 if (gfc_match (" )%t") != MATCH_YES
)
3865 new_st
.op
= EXEC_SYNC_ALL
;
3867 case ST_SYNC_IMAGES
:
3868 new_st
.op
= EXEC_SYNC_IMAGES
;
3870 case ST_SYNC_MEMORY
:
3871 new_st
.op
= EXEC_SYNC_MEMORY
;
3877 new_st
.expr1
= imageset
;
3878 new_st
.expr2
= stat
;
3879 new_st
.expr3
= errmsg
;
3884 gfc_syntax_error (st
);
3888 gfc_free_expr (stat
);
3890 gfc_free_expr (errmsg
);
3892 gfc_free_expr (tmp
);
3893 gfc_free_expr (imageset
);
3899 /* Match SYNC ALL statement. */
3902 gfc_match_sync_all (void)
3904 return sync_statement (ST_SYNC_ALL
);
3908 /* Match SYNC IMAGES statement. */
3911 gfc_match_sync_images (void)
3913 return sync_statement (ST_SYNC_IMAGES
);
3917 /* Match SYNC MEMORY statement. */
3920 gfc_match_sync_memory (void)
3922 return sync_statement (ST_SYNC_MEMORY
);
3926 /* Match a CONTINUE statement. */
3929 gfc_match_continue (void)
3931 if (gfc_match_eos () != MATCH_YES
)
3933 gfc_syntax_error (ST_CONTINUE
);
3937 new_st
.op
= EXEC_CONTINUE
;
3942 /* Match the (deprecated) ASSIGN statement. */
3945 gfc_match_assign (void)
3948 gfc_st_label
*label
;
3950 if (gfc_match (" %l", &label
) == MATCH_YES
)
3952 if (!gfc_reference_st_label (label
, ST_LABEL_UNKNOWN
))
3954 if (gfc_match (" to %v%t", &expr
) == MATCH_YES
)
3956 if (!gfc_notify_std (GFC_STD_F95_DEL
, "ASSIGN statement at %C"))
3959 expr
->symtree
->n
.sym
->attr
.assign
= 1;
3961 new_st
.op
= EXEC_LABEL_ASSIGN
;
3962 new_st
.label1
= label
;
3963 new_st
.expr1
= expr
;
3971 /* Match the GO TO statement. As a computed GOTO statement is
3972 matched, it is transformed into an equivalent SELECT block. No
3973 tree is necessary, and the resulting jumps-to-jumps are
3974 specifically optimized away by the back end. */
3977 gfc_match_goto (void)
3979 gfc_code
*head
, *tail
;
3982 gfc_st_label
*label
;
3986 if (gfc_match (" %l%t", &label
) == MATCH_YES
)
3988 if (!gfc_reference_st_label (label
, ST_LABEL_TARGET
))
3991 new_st
.op
= EXEC_GOTO
;
3992 new_st
.label1
= label
;
3996 /* The assigned GO TO statement. */
3998 if (gfc_match_variable (&expr
, 0) == MATCH_YES
)
4000 if (!gfc_notify_std (GFC_STD_F95_DEL
, "Assigned GOTO statement at %C"))
4003 new_st
.op
= EXEC_GOTO
;
4004 new_st
.expr1
= expr
;
4006 if (gfc_match_eos () == MATCH_YES
)
4009 /* Match label list. */
4010 gfc_match_char (',');
4011 if (gfc_match_char ('(') != MATCH_YES
)
4013 gfc_syntax_error (ST_GOTO
);
4020 m
= gfc_match_st_label (&label
);
4024 if (!gfc_reference_st_label (label
, ST_LABEL_TARGET
))
4028 head
= tail
= gfc_get_code (EXEC_GOTO
);
4031 tail
->block
= gfc_get_code (EXEC_GOTO
);
4035 tail
->label1
= label
;
4037 while (gfc_match_char (',') == MATCH_YES
);
4039 if (gfc_match (")%t") != MATCH_YES
)
4044 gfc_error ("Statement label list in GOTO at %C cannot be empty");
4047 new_st
.block
= head
;
4052 /* Last chance is a computed GO TO statement. */
4053 if (gfc_match_char ('(') != MATCH_YES
)
4055 gfc_syntax_error (ST_GOTO
);
4064 m
= gfc_match_st_label (&label
);
4068 if (!gfc_reference_st_label (label
, ST_LABEL_TARGET
))
4072 head
= tail
= gfc_get_code (EXEC_SELECT
);
4075 tail
->block
= gfc_get_code (EXEC_SELECT
);
4079 cp
= gfc_get_case ();
4080 cp
->low
= cp
->high
= gfc_get_int_expr (gfc_default_integer_kind
,
4083 tail
->ext
.block
.case_list
= cp
;
4085 tail
->next
= gfc_get_code (EXEC_GOTO
);
4086 tail
->next
->label1
= label
;
4088 while (gfc_match_char (',') == MATCH_YES
);
4090 if (gfc_match_char (')') != MATCH_YES
)
4095 gfc_error ("Statement label list in GOTO at %C cannot be empty");
4099 /* Get the rest of the statement. */
4100 gfc_match_char (',');
4102 if (gfc_match (" %e%t", &expr
) != MATCH_YES
)
4105 if (!gfc_notify_std (GFC_STD_F95_OBS
, "Computed GOTO at %C"))
4108 /* At this point, a computed GOTO has been fully matched and an
4109 equivalent SELECT statement constructed. */
4111 new_st
.op
= EXEC_SELECT
;
4112 new_st
.expr1
= NULL
;
4114 /* Hack: For a "real" SELECT, the expression is in expr. We put
4115 it in expr2 so we can distinguish then and produce the correct
4117 new_st
.expr2
= expr
;
4118 new_st
.block
= head
;
4122 gfc_syntax_error (ST_GOTO
);
4124 gfc_free_statements (head
);
4129 /* Frees a list of gfc_alloc structures. */
4132 gfc_free_alloc_list (gfc_alloc
*p
)
4139 gfc_free_expr (p
->expr
);
4145 /* Match an ALLOCATE statement. */
4148 gfc_match_allocate (void)
4150 gfc_alloc
*head
, *tail
;
4151 gfc_expr
*stat
, *errmsg
, *tmp
, *source
, *mold
;
4155 locus old_locus
, deferred_locus
, assumed_locus
;
4156 bool saw_stat
, saw_errmsg
, saw_source
, saw_mold
, saw_deferred
, b1
, b2
, b3
;
4157 bool saw_unlimited
= false, saw_assumed
= false;
4160 stat
= errmsg
= source
= mold
= tmp
= NULL
;
4161 saw_stat
= saw_errmsg
= saw_source
= saw_mold
= saw_deferred
= false;
4163 if (gfc_match_char ('(') != MATCH_YES
)
4165 gfc_syntax_error (ST_ALLOCATE
);
4169 /* Match an optional type-spec. */
4170 old_locus
= gfc_current_locus
;
4171 m
= gfc_match_type_spec (&ts
);
4172 if (m
== MATCH_ERROR
)
4174 else if (m
== MATCH_NO
)
4176 char name
[GFC_MAX_SYMBOL_LEN
+ 3];
4178 if (gfc_match ("%n :: ", name
) == MATCH_YES
)
4180 gfc_error ("Error in type-spec at %L", &old_locus
);
4184 ts
.type
= BT_UNKNOWN
;
4188 /* Needed for the F2008:C631 check below. */
4189 assumed_locus
= gfc_current_locus
;
4191 if (gfc_match (" :: ") == MATCH_YES
)
4193 if (!gfc_notify_std (GFC_STD_F2003
, "typespec in ALLOCATE at %L",
4199 gfc_error ("Type-spec at %L cannot contain a deferred "
4200 "type parameter", &old_locus
);
4204 if (ts
.type
== BT_CHARACTER
)
4206 if (!ts
.u
.cl
->length
)
4209 ts
.u
.cl
->length_from_typespec
= true;
4212 if (type_param_spec_list
4213 && gfc_spec_list_type (type_param_spec_list
, NULL
)
4216 gfc_error ("The type parameter spec list in the type-spec at "
4217 "%L cannot contain DEFERRED parameters", &old_locus
);
4223 ts
.type
= BT_UNKNOWN
;
4224 gfc_current_locus
= old_locus
;
4231 head
= tail
= gfc_get_alloc ();
4234 tail
->next
= gfc_get_alloc ();
4238 m
= gfc_match_variable (&tail
->expr
, 0);
4241 if (m
== MATCH_ERROR
)
4244 if (gfc_check_do_variable (tail
->expr
->symtree
))
4247 bool impure
= gfc_impure_variable (tail
->expr
->symtree
->n
.sym
);
4248 if (impure
&& gfc_pure (NULL
))
4250 gfc_error ("Bad allocate-object at %C for a PURE procedure");
4255 gfc_unset_implicit_pure (NULL
);
4257 /* F2008:C631 (R626) A type-param-value in a type-spec shall be an
4258 asterisk if and only if each allocate-object is a dummy argument
4259 for which the corresponding type parameter is assumed. */
4261 && (tail
->expr
->ts
.deferred
4262 || (tail
->expr
->ts
.u
.cl
&& tail
->expr
->ts
.u
.cl
->length
)
4263 || tail
->expr
->symtree
->n
.sym
->attr
.dummy
== 0))
4265 gfc_error ("Incompatible allocate-object at %C for CHARACTER "
4266 "type-spec at %L", &assumed_locus
);
4270 if (tail
->expr
->ts
.deferred
)
4272 saw_deferred
= true;
4273 deferred_locus
= tail
->expr
->where
;
4276 if (gfc_find_state (COMP_DO_CONCURRENT
)
4277 || gfc_find_state (COMP_CRITICAL
))
4280 bool coarray
= tail
->expr
->symtree
->n
.sym
->attr
.codimension
;
4281 for (ref
= tail
->expr
->ref
; ref
; ref
= ref
->next
)
4282 if (ref
->type
== REF_COMPONENT
)
4283 coarray
= ref
->u
.c
.component
->attr
.codimension
;
4285 if (coarray
&& gfc_find_state (COMP_DO_CONCURRENT
))
4287 gfc_error ("ALLOCATE of coarray at %C in DO CONCURRENT block");
4290 if (coarray
&& gfc_find_state (COMP_CRITICAL
))
4292 gfc_error ("ALLOCATE of coarray at %C in CRITICAL block");
4297 /* Check for F08:C628. */
4298 sym
= tail
->expr
->symtree
->n
.sym
;
4299 b1
= !(tail
->expr
->ref
4300 && (tail
->expr
->ref
->type
== REF_COMPONENT
4301 || tail
->expr
->ref
->type
== REF_ARRAY
));
4302 if (sym
&& sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
4303 b2
= !(CLASS_DATA (sym
)->attr
.allocatable
4304 || CLASS_DATA (sym
)->attr
.class_pointer
);
4306 b2
= sym
&& !(sym
->attr
.allocatable
|| sym
->attr
.pointer
4307 || sym
->attr
.proc_pointer
);
4308 b3
= sym
&& sym
->ns
&& sym
->ns
->proc_name
4309 && (sym
->ns
->proc_name
->attr
.allocatable
4310 || sym
->ns
->proc_name
->attr
.pointer
4311 || sym
->ns
->proc_name
->attr
.proc_pointer
);
4312 if (b1
&& b2
&& !b3
)
4314 gfc_error ("Allocate-object at %L is neither a data pointer "
4315 "nor an allocatable variable", &tail
->expr
->where
);
4319 /* The ALLOCATE statement had an optional typespec. Check the
4321 if (ts
.type
!= BT_UNKNOWN
)
4323 /* Enforce F03:C624. */
4324 if (!gfc_type_compatible (&tail
->expr
->ts
, &ts
))
4326 gfc_error ("Type of entity at %L is type incompatible with "
4327 "typespec", &tail
->expr
->where
);
4331 /* Enforce F03:C627. */
4332 if (ts
.kind
!= tail
->expr
->ts
.kind
&& !UNLIMITED_POLY (tail
->expr
))
4334 gfc_error ("Kind type parameter for entity at %L differs from "
4335 "the kind type parameter of the typespec",
4336 &tail
->expr
->where
);
4341 if (tail
->expr
->ts
.type
== BT_DERIVED
)
4342 tail
->expr
->ts
.u
.derived
= gfc_use_derived (tail
->expr
->ts
.u
.derived
);
4344 if (type_param_spec_list
)
4345 tail
->expr
->param_list
= gfc_copy_actual_arglist (type_param_spec_list
);
4347 saw_unlimited
= saw_unlimited
| UNLIMITED_POLY (tail
->expr
);
4349 if (gfc_peek_ascii_char () == '(' && !sym
->attr
.dimension
)
4351 gfc_error ("Shape specification for allocatable scalar at %C");
4355 if (gfc_match_char (',') != MATCH_YES
)
4360 m
= gfc_match (" stat = %v", &tmp
);
4361 if (m
== MATCH_ERROR
)
4368 gfc_error ("Redundant STAT tag found at %L", &tmp
->where
);
4376 if (gfc_check_do_variable (stat
->symtree
))
4379 if (gfc_match_char (',') == MATCH_YES
)
4380 goto alloc_opt_list
;
4383 m
= gfc_match (" errmsg = %v", &tmp
);
4384 if (m
== MATCH_ERROR
)
4388 if (!gfc_notify_std (GFC_STD_F2003
, "ERRMSG tag at %L", &tmp
->where
))
4394 gfc_error ("Redundant ERRMSG tag found at %L", &tmp
->where
);
4402 if (gfc_match_char (',') == MATCH_YES
)
4403 goto alloc_opt_list
;
4406 m
= gfc_match (" source = %e", &tmp
);
4407 if (m
== MATCH_ERROR
)
4411 if (!gfc_notify_std (GFC_STD_F2003
, "SOURCE tag at %L", &tmp
->where
))
4417 gfc_error ("Redundant SOURCE tag found at %L", &tmp
->where
);
4421 /* The next 2 conditionals check C631. */
4422 if (ts
.type
!= BT_UNKNOWN
)
4424 gfc_error ("SOURCE tag at %L conflicts with the typespec at %L",
4425 &tmp
->where
, &old_locus
);
4430 && !gfc_notify_std (GFC_STD_F2008
, "SOURCE tag at %L"
4431 " with more than a single allocate object",
4439 if (gfc_match_char (',') == MATCH_YES
)
4440 goto alloc_opt_list
;
4443 m
= gfc_match (" mold = %e", &tmp
);
4444 if (m
== MATCH_ERROR
)
4448 if (!gfc_notify_std (GFC_STD_F2008
, "MOLD tag at %L", &tmp
->where
))
4451 /* Check F08:C636. */
4454 gfc_error ("Redundant MOLD tag found at %L", &tmp
->where
);
4458 /* Check F08:C637. */
4459 if (ts
.type
!= BT_UNKNOWN
)
4461 gfc_error ("MOLD tag at %L conflicts with the typespec at %L",
4462 &tmp
->where
, &old_locus
);
4471 if (gfc_match_char (',') == MATCH_YES
)
4472 goto alloc_opt_list
;
4475 gfc_gobble_whitespace ();
4477 if (gfc_peek_char () == ')')
4481 if (gfc_match (" )%t") != MATCH_YES
)
4484 /* Check F08:C637. */
4487 gfc_error ("MOLD tag at %L conflicts with SOURCE tag at %L",
4488 &mold
->where
, &source
->where
);
4492 /* Check F03:C623, */
4493 if (saw_deferred
&& ts
.type
== BT_UNKNOWN
&& !source
&& !mold
)
4495 gfc_error ("Allocate-object at %L with a deferred type parameter "
4496 "requires either a type-spec or SOURCE tag or a MOLD tag",
4501 /* Check F03:C625, */
4502 if (saw_unlimited
&& ts
.type
== BT_UNKNOWN
&& !source
&& !mold
)
4504 for (tail
= head
; tail
; tail
= tail
->next
)
4506 if (UNLIMITED_POLY (tail
->expr
))
4507 gfc_error ("Unlimited polymorphic allocate-object at %L "
4508 "requires either a type-spec or SOURCE tag "
4509 "or a MOLD tag", &tail
->expr
->where
);
4514 new_st
.op
= EXEC_ALLOCATE
;
4515 new_st
.expr1
= stat
;
4516 new_st
.expr2
= errmsg
;
4518 new_st
.expr3
= source
;
4520 new_st
.expr3
= mold
;
4521 new_st
.ext
.alloc
.list
= head
;
4522 new_st
.ext
.alloc
.ts
= ts
;
4524 if (type_param_spec_list
)
4525 gfc_free_actual_arglist (type_param_spec_list
);
4530 gfc_syntax_error (ST_ALLOCATE
);
4533 gfc_free_expr (errmsg
);
4534 gfc_free_expr (source
);
4535 gfc_free_expr (stat
);
4536 gfc_free_expr (mold
);
4537 if (tmp
&& tmp
->expr_type
) gfc_free_expr (tmp
);
4538 gfc_free_alloc_list (head
);
4539 if (type_param_spec_list
)
4540 gfc_free_actual_arglist (type_param_spec_list
);
4545 /* Match a NULLIFY statement. A NULLIFY statement is transformed into
4546 a set of pointer assignments to intrinsic NULL(). */
4549 gfc_match_nullify (void)
4557 if (gfc_match_char ('(') != MATCH_YES
)
4562 m
= gfc_match_variable (&p
, 0);
4563 if (m
== MATCH_ERROR
)
4568 if (gfc_check_do_variable (p
->symtree
))
4572 if (gfc_is_coindexed (p
))
4574 gfc_error ("Pointer object at %C shall not be coindexed");
4578 /* build ' => NULL() '. */
4579 e
= gfc_get_null_expr (&gfc_current_locus
);
4581 /* Chain to list. */
4585 tail
->op
= EXEC_POINTER_ASSIGN
;
4589 tail
->next
= gfc_get_code (EXEC_POINTER_ASSIGN
);
4596 if (gfc_match (" )%t") == MATCH_YES
)
4598 if (gfc_match_char (',') != MATCH_YES
)
4605 gfc_syntax_error (ST_NULLIFY
);
4608 gfc_free_statements (new_st
.next
);
4610 gfc_free_expr (new_st
.expr1
);
4611 new_st
.expr1
= NULL
;
4612 gfc_free_expr (new_st
.expr2
);
4613 new_st
.expr2
= NULL
;
4618 /* Match a DEALLOCATE statement. */
4621 gfc_match_deallocate (void)
4623 gfc_alloc
*head
, *tail
;
4624 gfc_expr
*stat
, *errmsg
, *tmp
;
4627 bool saw_stat
, saw_errmsg
, b1
, b2
;
4630 stat
= errmsg
= tmp
= NULL
;
4631 saw_stat
= saw_errmsg
= false;
4633 if (gfc_match_char ('(') != MATCH_YES
)
4639 head
= tail
= gfc_get_alloc ();
4642 tail
->next
= gfc_get_alloc ();
4646 m
= gfc_match_variable (&tail
->expr
, 0);
4647 if (m
== MATCH_ERROR
)
4652 if (gfc_check_do_variable (tail
->expr
->symtree
))
4655 sym
= tail
->expr
->symtree
->n
.sym
;
4657 bool impure
= gfc_impure_variable (sym
);
4658 if (impure
&& gfc_pure (NULL
))
4660 gfc_error ("Illegal allocate-object at %C for a PURE procedure");
4665 gfc_unset_implicit_pure (NULL
);
4667 if (gfc_is_coarray (tail
->expr
)
4668 && gfc_find_state (COMP_DO_CONCURRENT
))
4670 gfc_error ("DEALLOCATE of coarray at %C in DO CONCURRENT block");
4674 if (gfc_is_coarray (tail
->expr
)
4675 && gfc_find_state (COMP_CRITICAL
))
4677 gfc_error ("DEALLOCATE of coarray at %C in CRITICAL block");
4681 /* FIXME: disable the checking on derived types. */
4682 b1
= !(tail
->expr
->ref
4683 && (tail
->expr
->ref
->type
== REF_COMPONENT
4684 || tail
->expr
->ref
->type
== REF_ARRAY
));
4685 if (sym
&& sym
->ts
.type
== BT_CLASS
)
4686 b2
= !(CLASS_DATA (sym
) && (CLASS_DATA (sym
)->attr
.allocatable
4687 || CLASS_DATA (sym
)->attr
.class_pointer
));
4689 b2
= sym
&& !(sym
->attr
.allocatable
|| sym
->attr
.pointer
4690 || sym
->attr
.proc_pointer
);
4693 gfc_error ("Allocate-object at %C is not a nonprocedure pointer "
4694 "nor an allocatable variable");
4698 if (gfc_match_char (',') != MATCH_YES
)
4703 m
= gfc_match (" stat = %v", &tmp
);
4704 if (m
== MATCH_ERROR
)
4710 gfc_error ("Redundant STAT tag found at %L", &tmp
->where
);
4711 gfc_free_expr (tmp
);
4718 if (gfc_check_do_variable (stat
->symtree
))
4721 if (gfc_match_char (',') == MATCH_YES
)
4722 goto dealloc_opt_list
;
4725 m
= gfc_match (" errmsg = %v", &tmp
);
4726 if (m
== MATCH_ERROR
)
4730 if (!gfc_notify_std (GFC_STD_F2003
, "ERRMSG at %L", &tmp
->where
))
4735 gfc_error ("Redundant ERRMSG tag found at %L", &tmp
->where
);
4736 gfc_free_expr (tmp
);
4743 if (gfc_match_char (',') == MATCH_YES
)
4744 goto dealloc_opt_list
;
4747 gfc_gobble_whitespace ();
4749 if (gfc_peek_char () == ')')
4753 if (gfc_match (" )%t") != MATCH_YES
)
4756 new_st
.op
= EXEC_DEALLOCATE
;
4757 new_st
.expr1
= stat
;
4758 new_st
.expr2
= errmsg
;
4759 new_st
.ext
.alloc
.list
= head
;
4764 gfc_syntax_error (ST_DEALLOCATE
);
4767 gfc_free_expr (errmsg
);
4768 gfc_free_expr (stat
);
4769 gfc_free_alloc_list (head
);
4774 /* Match a RETURN statement. */
4777 gfc_match_return (void)
4781 gfc_compile_state s
;
4785 if (gfc_find_state (COMP_CRITICAL
))
4787 gfc_error ("Image control statement RETURN at %C in CRITICAL block");
4791 if (gfc_find_state (COMP_DO_CONCURRENT
))
4793 gfc_error ("Image control statement RETURN at %C in DO CONCURRENT block");
4797 if (gfc_match_eos () == MATCH_YES
)
4800 if (!gfc_find_state (COMP_SUBROUTINE
))
4802 gfc_error ("Alternate RETURN statement at %C is only allowed within "
4807 if (gfc_current_form
== FORM_FREE
)
4809 /* The following are valid, so we can't require a blank after the
4813 char c
= gfc_peek_ascii_char ();
4814 if (ISALPHA (c
) || ISDIGIT (c
))
4818 m
= gfc_match (" %e%t", &e
);
4821 if (m
== MATCH_ERROR
)
4824 gfc_syntax_error (ST_RETURN
);
4831 gfc_enclosing_unit (&s
);
4832 if (s
== COMP_PROGRAM
4833 && !gfc_notify_std (GFC_STD_GNU
, "RETURN statement in "
4834 "main program at %C"))
4837 new_st
.op
= EXEC_RETURN
;
4844 /* Match the call of a type-bound procedure, if CALL%var has already been
4845 matched and var found to be a derived-type variable. */
4848 match_typebound_call (gfc_symtree
* varst
)
4853 base
= gfc_get_expr ();
4854 base
->expr_type
= EXPR_VARIABLE
;
4855 base
->symtree
= varst
;
4856 base
->where
= gfc_current_locus
;
4857 gfc_set_sym_referenced (varst
->n
.sym
);
4859 m
= gfc_match_varspec (base
, 0, true, true);
4861 gfc_error ("Expected component reference at %C");
4864 gfc_free_expr (base
);
4868 if (gfc_match_eos () != MATCH_YES
)
4870 gfc_error ("Junk after CALL at %C");
4871 gfc_free_expr (base
);
4875 if (base
->expr_type
== EXPR_COMPCALL
)
4876 new_st
.op
= EXEC_COMPCALL
;
4877 else if (base
->expr_type
== EXPR_PPC
)
4878 new_st
.op
= EXEC_CALL_PPC
;
4881 gfc_error ("Expected type-bound procedure or procedure pointer component "
4883 gfc_free_expr (base
);
4886 new_st
.expr1
= base
;
4892 /* Match a CALL statement. The tricky part here are possible
4893 alternate return specifiers. We handle these by having all
4894 "subroutines" actually return an integer via a register that gives
4895 the return number. If the call specifies alternate returns, we
4896 generate code for a SELECT statement whose case clauses contain
4897 GOTOs to the various labels. */
4900 gfc_match_call (void)
4902 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4903 gfc_actual_arglist
*a
, *arglist
;
4913 m
= gfc_match ("% %n", name
);
4919 if (gfc_get_ha_sym_tree (name
, &st
))
4924 /* If this is a variable of derived-type, it probably starts a type-bound
4926 if ((sym
->attr
.flavor
!= FL_PROCEDURE
4927 || gfc_is_function_return_value (sym
, gfc_current_ns
))
4928 && (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
))
4929 return match_typebound_call (st
);
4931 /* If it does not seem to be callable (include functions so that the
4932 right association is made. They are thrown out in resolution.)
4934 if (!sym
->attr
.generic
4935 && !sym
->attr
.subroutine
4936 && !sym
->attr
.function
)
4938 if (!(sym
->attr
.external
&& !sym
->attr
.referenced
))
4940 /* ...create a symbol in this scope... */
4941 if (sym
->ns
!= gfc_current_ns
4942 && gfc_get_sym_tree (name
, NULL
, &st
, false) == 1)
4945 if (sym
!= st
->n
.sym
)
4949 /* ...and then to try to make the symbol into a subroutine. */
4950 if (!gfc_add_subroutine (&sym
->attr
, sym
->name
, NULL
))
4954 gfc_set_sym_referenced (sym
);
4956 if (gfc_match_eos () != MATCH_YES
)
4958 m
= gfc_match_actual_arglist (1, &arglist
);
4961 if (m
== MATCH_ERROR
)
4964 if (gfc_match_eos () != MATCH_YES
)
4968 /* If any alternate return labels were found, construct a SELECT
4969 statement that will jump to the right place. */
4972 for (a
= arglist
; a
; a
= a
->next
)
4973 if (a
->expr
== NULL
)
4981 gfc_symtree
*select_st
;
4982 gfc_symbol
*select_sym
;
4983 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
4985 new_st
.next
= c
= gfc_get_code (EXEC_SELECT
);
4986 sprintf (name
, "_result_%s", sym
->name
);
4987 gfc_get_ha_sym_tree (name
, &select_st
); /* Can't fail. */
4989 select_sym
= select_st
->n
.sym
;
4990 select_sym
->ts
.type
= BT_INTEGER
;
4991 select_sym
->ts
.kind
= gfc_default_integer_kind
;
4992 gfc_set_sym_referenced (select_sym
);
4993 c
->expr1
= gfc_get_expr ();
4994 c
->expr1
->expr_type
= EXPR_VARIABLE
;
4995 c
->expr1
->symtree
= select_st
;
4996 c
->expr1
->ts
= select_sym
->ts
;
4997 c
->expr1
->where
= gfc_current_locus
;
5000 for (a
= arglist
; a
; a
= a
->next
)
5002 if (a
->expr
!= NULL
)
5005 if (!gfc_reference_st_label (a
->label
, ST_LABEL_TARGET
))
5010 c
->block
= gfc_get_code (EXEC_SELECT
);
5013 new_case
= gfc_get_case ();
5014 new_case
->high
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
, i
);
5015 new_case
->low
= new_case
->high
;
5016 c
->ext
.block
.case_list
= new_case
;
5018 c
->next
= gfc_get_code (EXEC_GOTO
);
5019 c
->next
->label1
= a
->label
;
5023 new_st
.op
= EXEC_CALL
;
5024 new_st
.symtree
= st
;
5025 new_st
.ext
.actual
= arglist
;
5030 gfc_syntax_error (ST_CALL
);
5033 gfc_free_actual_arglist (arglist
);
5038 /* Given a name, return a pointer to the common head structure,
5039 creating it if it does not exist. If FROM_MODULE is nonzero, we
5040 mangle the name so that it doesn't interfere with commons defined
5041 in the using namespace.
5042 TODO: Add to global symbol tree. */
5045 gfc_get_common (const char *name
, int from_module
)
5048 static int serial
= 0;
5049 char mangled_name
[GFC_MAX_SYMBOL_LEN
+ 1];
5053 /* A use associated common block is only needed to correctly layout
5054 the variables it contains. */
5055 snprintf (mangled_name
, GFC_MAX_SYMBOL_LEN
, "_%d_%s", serial
++, name
);
5056 st
= gfc_new_symtree (&gfc_current_ns
->common_root
, mangled_name
);
5060 st
= gfc_find_symtree (gfc_current_ns
->common_root
, name
);
5063 st
= gfc_new_symtree (&gfc_current_ns
->common_root
, name
);
5066 if (st
->n
.common
== NULL
)
5068 st
->n
.common
= gfc_get_common_head ();
5069 st
->n
.common
->where
= gfc_current_locus
;
5070 strcpy (st
->n
.common
->name
, name
);
5073 return st
->n
.common
;
5077 /* Match a common block name. */
5079 match
match_common_name (char *name
)
5083 if (gfc_match_char ('/') == MATCH_NO
)
5089 if (gfc_match_char ('/') == MATCH_YES
)
5095 m
= gfc_match_name (name
);
5097 if (m
== MATCH_ERROR
)
5099 if (m
== MATCH_YES
&& gfc_match_char ('/') == MATCH_YES
)
5102 gfc_error ("Syntax error in common block name at %C");
5107 /* Match a COMMON statement. */
5110 gfc_match_common (void)
5112 gfc_symbol
*sym
, **head
, *tail
, *other
;
5113 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5123 m
= match_common_name (name
);
5124 if (m
== MATCH_ERROR
)
5127 if (name
[0] == '\0')
5129 t
= &gfc_current_ns
->blank_common
;
5130 if (t
->head
== NULL
)
5131 t
->where
= gfc_current_locus
;
5135 t
= gfc_get_common (name
, 0);
5144 while (tail
->common_next
)
5145 tail
= tail
->common_next
;
5148 /* Grab the list of symbols. */
5151 m
= gfc_match_symbol (&sym
, 0);
5152 if (m
== MATCH_ERROR
)
5157 /* See if we know the current common block is bind(c), and if
5158 so, then see if we can check if the symbol is (which it'll
5159 need to be). This can happen if the bind(c) attr stmt was
5160 applied to the common block, and the variable(s) already
5161 defined, before declaring the common block. */
5162 if (t
->is_bind_c
== 1)
5164 if (sym
->ts
.type
!= BT_UNKNOWN
&& sym
->ts
.is_c_interop
!= 1)
5166 /* If we find an error, just print it and continue,
5167 cause it's just semantic, and we can see if there
5169 gfc_error_now ("Variable %qs at %L in common block %qs "
5170 "at %C must be declared with a C "
5171 "interoperable kind since common block "
5173 sym
->name
, &(sym
->declared_at
), t
->name
,
5177 if (sym
->attr
.is_bind_c
== 1)
5178 gfc_error_now ("Variable %qs in common block %qs at %C cannot "
5179 "be bind(c) since it is not global", sym
->name
,
5183 if (sym
->attr
.in_common
)
5185 gfc_error ("Symbol %qs at %C is already in a COMMON block",
5190 if (((sym
->value
!= NULL
&& sym
->value
->expr_type
!= EXPR_NULL
)
5191 || sym
->attr
.data
) && gfc_current_state () != COMP_BLOCK_DATA
)
5193 if (!gfc_notify_std (GFC_STD_GNU
, "Initialized symbol %qs at "
5194 "%C can only be COMMON in BLOCK DATA",
5199 /* Deal with an optional array specification after the
5201 m
= gfc_match_array_spec (&as
, true, true);
5202 if (m
== MATCH_ERROR
)
5207 if (as
->type
!= AS_EXPLICIT
)
5209 gfc_error ("Array specification for symbol %qs in COMMON "
5210 "at %C must be explicit", sym
->name
);
5214 if (!gfc_add_dimension (&sym
->attr
, sym
->name
, NULL
))
5217 if (sym
->attr
.pointer
)
5219 gfc_error ("Symbol %qs in COMMON at %C cannot be a "
5220 "POINTER array", sym
->name
);
5229 /* Add the in_common attribute, but ignore the reported errors
5230 if any, and continue matching. */
5231 gfc_add_in_common (&sym
->attr
, sym
->name
, NULL
);
5233 sym
->common_block
= t
;
5234 sym
->common_block
->refs
++;
5237 tail
->common_next
= sym
;
5243 sym
->common_head
= t
;
5245 /* Check to see if the symbol is already in an equivalence group.
5246 If it is, set the other members as being in common. */
5247 if (sym
->attr
.in_equivalence
)
5249 for (e1
= gfc_current_ns
->equiv
; e1
; e1
= e1
->next
)
5251 for (e2
= e1
; e2
; e2
= e2
->eq
)
5252 if (e2
->expr
->symtree
->n
.sym
== sym
)
5259 for (e2
= e1
; e2
; e2
= e2
->eq
)
5261 other
= e2
->expr
->symtree
->n
.sym
;
5262 if (other
->common_head
5263 && other
->common_head
!= sym
->common_head
)
5265 gfc_error ("Symbol %qs, in COMMON block %qs at "
5266 "%C is being indirectly equivalenced to "
5267 "another COMMON block %qs",
5268 sym
->name
, sym
->common_head
->name
,
5269 other
->common_head
->name
);
5272 other
->attr
.in_common
= 1;
5273 other
->common_head
= t
;
5279 gfc_gobble_whitespace ();
5280 if (gfc_match_eos () == MATCH_YES
)
5282 if (gfc_peek_ascii_char () == '/')
5284 if (gfc_match_char (',') != MATCH_YES
)
5286 gfc_gobble_whitespace ();
5287 if (gfc_peek_ascii_char () == '/')
5296 gfc_syntax_error (ST_COMMON
);
5299 gfc_free_array_spec (as
);
5304 /* Match a BLOCK DATA program unit. */
5307 gfc_match_block_data (void)
5309 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5313 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "BLOCK DATA construct at %L",
5314 &gfc_current_locus
))
5317 if (gfc_match_eos () == MATCH_YES
)
5319 gfc_new_block
= NULL
;
5323 m
= gfc_match ("% %n%t", name
);
5327 if (gfc_get_symbol (name
, NULL
, &sym
))
5330 if (!gfc_add_flavor (&sym
->attr
, FL_BLOCK_DATA
, sym
->name
, NULL
))
5333 gfc_new_block
= sym
;
5339 /* Free a namelist structure. */
5342 gfc_free_namelist (gfc_namelist
*name
)
5346 for (; name
; name
= n
)
5354 /* Free an OpenMP namelist structure. */
5357 gfc_free_omp_namelist (gfc_omp_namelist
*name
)
5359 gfc_omp_namelist
*n
;
5361 for (; name
; name
= n
)
5363 gfc_free_expr (name
->expr
);
5366 if (name
->udr
->combiner
)
5367 gfc_free_statement (name
->udr
->combiner
);
5368 if (name
->udr
->initializer
)
5369 gfc_free_statement (name
->udr
->initializer
);
5378 /* Match a NAMELIST statement. */
5381 gfc_match_namelist (void)
5383 gfc_symbol
*group_name
, *sym
;
5387 m
= gfc_match (" / %s /", &group_name
);
5390 if (m
== MATCH_ERROR
)
5395 if (group_name
->ts
.type
!= BT_UNKNOWN
)
5397 gfc_error ("Namelist group name %qs at %C already has a basic "
5398 "type of %s", group_name
->name
,
5399 gfc_typename (&group_name
->ts
));
5403 if (group_name
->attr
.flavor
== FL_NAMELIST
5404 && group_name
->attr
.use_assoc
5405 && !gfc_notify_std (GFC_STD_GNU
, "Namelist group name %qs "
5406 "at %C already is USE associated and can"
5407 "not be respecified.", group_name
->name
))
5410 if (group_name
->attr
.flavor
!= FL_NAMELIST
5411 && !gfc_add_flavor (&group_name
->attr
, FL_NAMELIST
,
5412 group_name
->name
, NULL
))
5417 m
= gfc_match_symbol (&sym
, 1);
5420 if (m
== MATCH_ERROR
)
5423 if (sym
->attr
.in_namelist
== 0
5424 && !gfc_add_in_namelist (&sym
->attr
, sym
->name
, NULL
))
5427 /* Use gfc_error_check here, rather than goto error, so that
5428 these are the only errors for the next two lines. */
5429 if (sym
->as
&& sym
->as
->type
== AS_ASSUMED_SIZE
)
5431 gfc_error ("Assumed size array %qs in namelist %qs at "
5432 "%C is not allowed", sym
->name
, group_name
->name
);
5436 nl
= gfc_get_namelist ();
5440 if (group_name
->namelist
== NULL
)
5441 group_name
->namelist
= group_name
->namelist_tail
= nl
;
5444 group_name
->namelist_tail
->next
= nl
;
5445 group_name
->namelist_tail
= nl
;
5448 if (gfc_match_eos () == MATCH_YES
)
5451 m
= gfc_match_char (',');
5453 if (gfc_match_char ('/') == MATCH_YES
)
5455 m2
= gfc_match (" %s /", &group_name
);
5456 if (m2
== MATCH_YES
)
5458 if (m2
== MATCH_ERROR
)
5472 gfc_syntax_error (ST_NAMELIST
);
5479 /* Match a MODULE statement. */
5482 gfc_match_module (void)
5486 m
= gfc_match (" %s%t", &gfc_new_block
);
5490 if (!gfc_add_flavor (&gfc_new_block
->attr
, FL_MODULE
,
5491 gfc_new_block
->name
, NULL
))
5498 /* Free equivalence sets and lists. Recursively is the easiest way to
5502 gfc_free_equiv_until (gfc_equiv
*eq
, gfc_equiv
*stop
)
5507 gfc_free_equiv (eq
->eq
);
5508 gfc_free_equiv_until (eq
->next
, stop
);
5509 gfc_free_expr (eq
->expr
);
5515 gfc_free_equiv (gfc_equiv
*eq
)
5517 gfc_free_equiv_until (eq
, NULL
);
5521 /* Match an EQUIVALENCE statement. */
5524 gfc_match_equivalence (void)
5526 gfc_equiv
*eq
, *set
, *tail
;
5530 gfc_common_head
*common_head
= NULL
;
5538 eq
= gfc_get_equiv ();
5542 eq
->next
= gfc_current_ns
->equiv
;
5543 gfc_current_ns
->equiv
= eq
;
5545 if (gfc_match_char ('(') != MATCH_YES
)
5549 common_flag
= FALSE
;
5554 m
= gfc_match_equiv_variable (&set
->expr
);
5555 if (m
== MATCH_ERROR
)
5560 /* count the number of objects. */
5563 if (gfc_match_char ('%') == MATCH_YES
)
5565 gfc_error ("Derived type component %C is not a "
5566 "permitted EQUIVALENCE member");
5570 for (ref
= set
->expr
->ref
; ref
; ref
= ref
->next
)
5571 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
== AR_SECTION
)
5573 gfc_error ("Array reference in EQUIVALENCE at %C cannot "
5574 "be an array section");
5578 sym
= set
->expr
->symtree
->n
.sym
;
5580 if (!gfc_add_in_equivalence (&sym
->attr
, sym
->name
, NULL
))
5583 if (sym
->attr
.in_common
)
5586 common_head
= sym
->common_head
;
5589 if (gfc_match_char (')') == MATCH_YES
)
5592 if (gfc_match_char (',') != MATCH_YES
)
5595 set
->eq
= gfc_get_equiv ();
5601 gfc_error ("EQUIVALENCE at %C requires two or more objects");
5605 /* If one of the members of an equivalence is in common, then
5606 mark them all as being in common. Before doing this, check
5607 that members of the equivalence group are not in different
5610 for (set
= eq
; set
; set
= set
->eq
)
5612 sym
= set
->expr
->symtree
->n
.sym
;
5613 if (sym
->common_head
&& sym
->common_head
!= common_head
)
5615 gfc_error ("Attempt to indirectly overlap COMMON "
5616 "blocks %s and %s by EQUIVALENCE at %C",
5617 sym
->common_head
->name
, common_head
->name
);
5620 sym
->attr
.in_common
= 1;
5621 sym
->common_head
= common_head
;
5624 if (gfc_match_eos () == MATCH_YES
)
5626 if (gfc_match_char (',') != MATCH_YES
)
5628 gfc_error ("Expecting a comma in EQUIVALENCE at %C");
5633 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "EQUIVALENCE statement at %C"))
5639 gfc_syntax_error (ST_EQUIVALENCE
);
5645 gfc_free_equiv (gfc_current_ns
->equiv
);
5646 gfc_current_ns
->equiv
= eq
;
5652 /* Check that a statement function is not recursive. This is done by looking
5653 for the statement function symbol(sym) by looking recursively through its
5654 expression(e). If a reference to sym is found, true is returned.
5655 12.5.4 requires that any variable of function that is implicitly typed
5656 shall have that type confirmed by any subsequent type declaration. The
5657 implicit typing is conveniently done here. */
5659 recursive_stmt_fcn (gfc_expr
*, gfc_symbol
*);
5662 check_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
5668 switch (e
->expr_type
)
5671 if (e
->symtree
== NULL
)
5674 /* Check the name before testing for nested recursion! */
5675 if (sym
->name
== e
->symtree
->n
.sym
->name
)
5678 /* Catch recursion via other statement functions. */
5679 if (e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
5680 && e
->symtree
->n
.sym
->value
5681 && recursive_stmt_fcn (e
->symtree
->n
.sym
->value
, sym
))
5684 if (e
->symtree
->n
.sym
->ts
.type
== BT_UNKNOWN
)
5685 gfc_set_default_type (e
->symtree
->n
.sym
, 0, NULL
);
5690 if (e
->symtree
&& sym
->name
== e
->symtree
->n
.sym
->name
)
5693 if (e
->symtree
->n
.sym
->ts
.type
== BT_UNKNOWN
)
5694 gfc_set_default_type (e
->symtree
->n
.sym
, 0, NULL
);
5706 recursive_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
)
5708 return gfc_traverse_expr (e
, sym
, check_stmt_fcn
, 0);
5712 /* Match a statement function declaration. It is so easy to match
5713 non-statement function statements with a MATCH_ERROR as opposed to
5714 MATCH_NO that we suppress error message in most cases. */
5717 gfc_match_st_function (void)
5719 gfc_error_buffer old_error
;
5724 m
= gfc_match_symbol (&sym
, 0);
5728 gfc_push_error (&old_error
);
5730 if (!gfc_add_procedure (&sym
->attr
, PROC_ST_FUNCTION
, sym
->name
, NULL
))
5733 if (gfc_match_formal_arglist (sym
, 1, 0) != MATCH_YES
)
5736 m
= gfc_match (" = %e%t", &expr
);
5740 gfc_free_error (&old_error
);
5742 if (m
== MATCH_ERROR
)
5745 if (recursive_stmt_fcn (expr
, sym
))
5747 gfc_error ("Statement function at %L is recursive", &expr
->where
);
5753 if ((gfc_current_state () == COMP_FUNCTION
5754 || gfc_current_state () == COMP_SUBROUTINE
)
5755 && gfc_state_stack
->previous
->state
== COMP_INTERFACE
)
5757 gfc_error ("Statement function at %L cannot appear within an INTERFACE",
5762 if (!gfc_notify_std (GFC_STD_F95_OBS
, "Statement function at %C"))
5768 gfc_pop_error (&old_error
);
5773 /* Match an assignment to a pointer function (F2008). This could, in
5774 general be ambiguous with a statement function. In this implementation
5775 it remains so if it is the first statement after the specification
5779 gfc_match_ptr_fcn_assign (void)
5781 gfc_error_buffer old_error
;
5786 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5788 old_loc
= gfc_current_locus
;
5789 m
= gfc_match_name (name
);
5793 gfc_find_symbol (name
, NULL
, 1, &sym
);
5794 if (sym
&& sym
->attr
.flavor
!= FL_PROCEDURE
)
5797 gfc_push_error (&old_error
);
5799 if (sym
&& sym
->attr
.function
)
5800 goto match_actual_arglist
;
5802 gfc_current_locus
= old_loc
;
5803 m
= gfc_match_symbol (&sym
, 0);
5807 if (!gfc_add_procedure (&sym
->attr
, PROC_UNKNOWN
, sym
->name
, NULL
))
5810 match_actual_arglist
:
5811 gfc_current_locus
= old_loc
;
5812 m
= gfc_match (" %e", &expr
);
5816 new_st
.op
= EXEC_ASSIGN
;
5817 new_st
.expr1
= expr
;
5820 m
= gfc_match (" = %e%t", &expr
);
5824 new_st
.expr2
= expr
;
5828 gfc_pop_error (&old_error
);
5833 /***************** SELECT CASE subroutines ******************/
5835 /* Free a single case structure. */
5838 free_case (gfc_case
*p
)
5840 if (p
->low
== p
->high
)
5842 gfc_free_expr (p
->low
);
5843 gfc_free_expr (p
->high
);
5848 /* Free a list of case structures. */
5851 gfc_free_case_list (gfc_case
*p
)
5863 /* Match a single case selector. Combining the requirements of F08:C830
5864 and F08:C832 (R838) means that the case-value must have either CHARACTER,
5865 INTEGER, or LOGICAL type. */
5868 match_case_selector (gfc_case
**cp
)
5873 c
= gfc_get_case ();
5874 c
->where
= gfc_current_locus
;
5876 if (gfc_match_char (':') == MATCH_YES
)
5878 m
= gfc_match_init_expr (&c
->high
);
5881 if (m
== MATCH_ERROR
)
5884 if (c
->high
->ts
.type
!= BT_LOGICAL
&& c
->high
->ts
.type
!= BT_INTEGER
5885 && c
->high
->ts
.type
!= BT_CHARACTER
)
5887 gfc_error ("Expression in CASE selector at %L cannot be %s",
5888 &c
->high
->where
, gfc_typename (&c
->high
->ts
));
5894 m
= gfc_match_init_expr (&c
->low
);
5895 if (m
== MATCH_ERROR
)
5900 if (c
->low
->ts
.type
!= BT_LOGICAL
&& c
->low
->ts
.type
!= BT_INTEGER
5901 && c
->low
->ts
.type
!= BT_CHARACTER
)
5903 gfc_error ("Expression in CASE selector at %L cannot be %s",
5904 &c
->low
->where
, gfc_typename (&c
->low
->ts
));
5908 /* If we're not looking at a ':' now, make a range out of a single
5909 target. Else get the upper bound for the case range. */
5910 if (gfc_match_char (':') != MATCH_YES
)
5914 m
= gfc_match_init_expr (&c
->high
);
5915 if (m
== MATCH_ERROR
)
5917 /* MATCH_NO is fine. It's OK if nothing is there! */
5925 gfc_error ("Expected initialization expression in CASE at %C");
5933 /* Match the end of a case statement. */
5936 match_case_eos (void)
5938 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
5941 if (gfc_match_eos () == MATCH_YES
)
5944 /* If the case construct doesn't have a case-construct-name, we
5945 should have matched the EOS. */
5946 if (!gfc_current_block ())
5949 gfc_gobble_whitespace ();
5951 m
= gfc_match_name (name
);
5955 if (strcmp (name
, gfc_current_block ()->name
) != 0)
5957 gfc_error ("Expected block name %qs of SELECT construct at %C",
5958 gfc_current_block ()->name
);
5962 return gfc_match_eos ();
5966 /* Match a SELECT statement. */
5969 gfc_match_select (void)
5974 m
= gfc_match_label ();
5975 if (m
== MATCH_ERROR
)
5978 m
= gfc_match (" select case ( %e )%t", &expr
);
5982 new_st
.op
= EXEC_SELECT
;
5983 new_st
.expr1
= expr
;
5989 /* Transfer the selector typespec to the associate name. */
5992 copy_ts_from_selector_to_associate (gfc_expr
*associate
, gfc_expr
*selector
)
5995 gfc_symbol
*assoc_sym
;
5998 assoc_sym
= associate
->symtree
->n
.sym
;
6000 /* At this stage the expression rank and arrayspec dimensions have
6001 not been completely sorted out. We must get the expr2->rank
6002 right here, so that the correct class container is obtained. */
6003 ref
= selector
->ref
;
6004 while (ref
&& ref
->next
)
6007 if (selector
->ts
.type
== BT_CLASS
&& CLASS_DATA (selector
)->as
6008 && ref
&& ref
->type
== REF_ARRAY
)
6010 /* Ensure that the array reference type is set. We cannot use
6011 gfc_resolve_expr at this point, so the usable parts of
6012 resolve.c(resolve_array_ref) are employed to do it. */
6013 if (ref
->u
.ar
.type
== AR_UNKNOWN
)
6015 ref
->u
.ar
.type
= AR_ELEMENT
;
6016 for (int i
= 0; i
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; i
++)
6017 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
6018 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
6019 || (ref
->u
.ar
.dimen_type
[i
] == DIMEN_UNKNOWN
6020 && ref
->u
.ar
.start
[i
] && ref
->u
.ar
.start
[i
]->rank
))
6022 ref
->u
.ar
.type
= AR_SECTION
;
6027 if (ref
->u
.ar
.type
== AR_FULL
)
6028 selector
->rank
= CLASS_DATA (selector
)->as
->rank
;
6029 else if (ref
->u
.ar
.type
== AR_SECTION
)
6030 selector
->rank
= ref
->u
.ar
.dimen
;
6034 rank
= selector
->rank
;
6039 for (int i
= 0; i
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; i
++)
6040 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_ELEMENT
6041 || (ref
->u
.ar
.dimen_type
[i
] == DIMEN_UNKNOWN
6042 && ref
->u
.ar
.end
[i
] == NULL
6043 && ref
->u
.ar
.stride
[i
] == NULL
))
6048 assoc_sym
->attr
.dimension
= 1;
6049 assoc_sym
->as
= gfc_get_array_spec ();
6050 assoc_sym
->as
->rank
= rank
;
6051 assoc_sym
->as
->type
= AS_DEFERRED
;
6054 assoc_sym
->as
= NULL
;
6057 assoc_sym
->as
= NULL
;
6059 if (selector
->ts
.type
== BT_CLASS
)
6061 /* The correct class container has to be available. */
6062 assoc_sym
->ts
.type
= BT_CLASS
;
6063 assoc_sym
->ts
.u
.derived
= CLASS_DATA (selector
)->ts
.u
.derived
;
6064 assoc_sym
->attr
.pointer
= 1;
6065 gfc_build_class_symbol (&assoc_sym
->ts
, &assoc_sym
->attr
, &assoc_sym
->as
);
6070 /* Push the current selector onto the SELECT TYPE stack. */
6073 select_type_push (gfc_symbol
*sel
)
6075 gfc_select_type_stack
*top
= gfc_get_select_type_stack ();
6076 top
->selector
= sel
;
6078 top
->prev
= select_type_stack
;
6080 select_type_stack
= top
;
6084 /* Set the temporary for the current intrinsic SELECT TYPE selector. */
6086 static gfc_symtree
*
6087 select_intrinsic_set_tmp (gfc_typespec
*ts
)
6089 char name
[GFC_MAX_SYMBOL_LEN
];
6091 HOST_WIDE_INT charlen
= 0;
6093 if (ts
->type
== BT_CLASS
|| ts
->type
== BT_DERIVED
)
6096 if (select_type_stack
->selector
->ts
.type
== BT_CLASS
6097 && !select_type_stack
->selector
->attr
.class_ok
)
6100 if (ts
->type
== BT_CHARACTER
&& ts
->u
.cl
&& ts
->u
.cl
->length
6101 && ts
->u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
6102 charlen
= gfc_mpz_get_hwi (ts
->u
.cl
->length
->value
.integer
);
6104 if (ts
->type
!= BT_CHARACTER
)
6105 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (ts
->type
),
6108 snprintf (name
, sizeof (name
), "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
6109 gfc_basic_typename (ts
->type
), charlen
, ts
->kind
);
6111 gfc_get_sym_tree (name
, gfc_current_ns
, &tmp
, false);
6112 gfc_add_type (tmp
->n
.sym
, ts
, NULL
);
6114 /* Copy across the array spec to the selector. */
6115 if (select_type_stack
->selector
->ts
.type
== BT_CLASS
6116 && (CLASS_DATA (select_type_stack
->selector
)->attr
.dimension
6117 || CLASS_DATA (select_type_stack
->selector
)->attr
.codimension
))
6119 tmp
->n
.sym
->attr
.pointer
= 1;
6120 tmp
->n
.sym
->attr
.dimension
6121 = CLASS_DATA (select_type_stack
->selector
)->attr
.dimension
;
6122 tmp
->n
.sym
->attr
.codimension
6123 = CLASS_DATA (select_type_stack
->selector
)->attr
.codimension
;
6125 = gfc_copy_array_spec (CLASS_DATA (select_type_stack
->selector
)->as
);
6128 gfc_set_sym_referenced (tmp
->n
.sym
);
6129 gfc_add_flavor (&tmp
->n
.sym
->attr
, FL_VARIABLE
, name
, NULL
);
6130 tmp
->n
.sym
->attr
.select_type_temporary
= 1;
6136 /* Set up a temporary for the current TYPE IS / CLASS IS branch . */
6139 select_type_set_tmp (gfc_typespec
*ts
)
6141 char name
[GFC_MAX_SYMBOL_LEN
];
6142 gfc_symtree
*tmp
= NULL
;
6146 select_type_stack
->tmp
= NULL
;
6150 tmp
= select_intrinsic_set_tmp (ts
);
6157 if (ts
->type
== BT_CLASS
)
6158 sprintf (name
, "__tmp_class_%s", ts
->u
.derived
->name
);
6160 sprintf (name
, "__tmp_type_%s", ts
->u
.derived
->name
);
6161 gfc_get_sym_tree (name
, gfc_current_ns
, &tmp
, false);
6162 gfc_add_type (tmp
->n
.sym
, ts
, NULL
);
6164 if (select_type_stack
->selector
->ts
.type
== BT_CLASS
6165 && select_type_stack
->selector
->attr
.class_ok
)
6167 tmp
->n
.sym
->attr
.pointer
6168 = CLASS_DATA (select_type_stack
->selector
)->attr
.class_pointer
;
6170 /* Copy across the array spec to the selector. */
6171 if (CLASS_DATA (select_type_stack
->selector
)->attr
.dimension
6172 || CLASS_DATA (select_type_stack
->selector
)->attr
.codimension
)
6174 tmp
->n
.sym
->attr
.dimension
6175 = CLASS_DATA (select_type_stack
->selector
)->attr
.dimension
;
6176 tmp
->n
.sym
->attr
.codimension
6177 = CLASS_DATA (select_type_stack
->selector
)->attr
.codimension
;
6179 = gfc_copy_array_spec (CLASS_DATA (select_type_stack
->selector
)->as
);
6183 gfc_set_sym_referenced (tmp
->n
.sym
);
6184 gfc_add_flavor (&tmp
->n
.sym
->attr
, FL_VARIABLE
, name
, NULL
);
6185 tmp
->n
.sym
->attr
.select_type_temporary
= 1;
6187 if (ts
->type
== BT_CLASS
)
6188 gfc_build_class_symbol (&tmp
->n
.sym
->ts
, &tmp
->n
.sym
->attr
,
6192 /* Add an association for it, so the rest of the parser knows it is
6193 an associate-name. The target will be set during resolution. */
6194 tmp
->n
.sym
->assoc
= gfc_get_association_list ();
6195 tmp
->n
.sym
->assoc
->dangling
= 1;
6196 tmp
->n
.sym
->assoc
->st
= tmp
;
6198 select_type_stack
->tmp
= tmp
;
6202 /* Match a SELECT TYPE statement. */
6205 gfc_match_select_type (void)
6207 gfc_expr
*expr1
, *expr2
= NULL
;
6209 char name
[GFC_MAX_SYMBOL_LEN
];
6212 gfc_namespace
*ns
= gfc_current_ns
;
6214 m
= gfc_match_label ();
6215 if (m
== MATCH_ERROR
)
6218 m
= gfc_match (" select type ( ");
6222 gfc_current_ns
= gfc_build_block_ns (ns
);
6223 m
= gfc_match (" %n => %e", name
, &expr2
);
6226 expr1
= gfc_get_expr ();
6227 expr1
->expr_type
= EXPR_VARIABLE
;
6228 expr1
->where
= expr2
->where
;
6229 if (gfc_get_sym_tree (name
, NULL
, &expr1
->symtree
, false))
6235 sym
= expr1
->symtree
->n
.sym
;
6236 if (expr2
->ts
.type
== BT_UNKNOWN
)
6237 sym
->attr
.untyped
= 1;
6239 copy_ts_from_selector_to_associate (expr1
, expr2
);
6241 sym
->attr
.flavor
= FL_VARIABLE
;
6242 sym
->attr
.referenced
= 1;
6243 sym
->attr
.class_ok
= 1;
6247 m
= gfc_match (" %e ", &expr1
);
6250 std::swap (ns
, gfc_current_ns
);
6251 gfc_free_namespace (ns
);
6256 m
= gfc_match (" )%t");
6259 gfc_error ("parse error in SELECT TYPE statement at %C");
6263 /* This ghastly expression seems to be needed to distinguish a CLASS
6264 array, which can have a reference, from other expressions that
6265 have references, such as derived type components, and are not
6266 allowed by the standard.
6267 TODO: see if it is sufficient to exclude component and substring
6269 class_array
= (expr1
->expr_type
== EXPR_VARIABLE
6270 && expr1
->ts
.type
== BT_CLASS
6271 && CLASS_DATA (expr1
)
6272 && (strcmp (CLASS_DATA (expr1
)->name
, "_data") == 0)
6273 && (CLASS_DATA (expr1
)->attr
.dimension
6274 || CLASS_DATA (expr1
)->attr
.codimension
)
6276 && expr1
->ref
->type
== REF_ARRAY
6277 && expr1
->ref
->u
.ar
.type
== AR_FULL
6278 && expr1
->ref
->next
== NULL
);
6280 /* Check for F03:C811 (F08:C835). */
6281 if (!expr2
&& (expr1
->expr_type
!= EXPR_VARIABLE
6282 || (!class_array
&& expr1
->ref
!= NULL
)))
6284 gfc_error ("Selector in SELECT TYPE at %C is not a named variable; "
6285 "use associate-name=>");
6290 new_st
.op
= EXEC_SELECT_TYPE
;
6291 new_st
.expr1
= expr1
;
6292 new_st
.expr2
= expr2
;
6293 new_st
.ext
.block
.ns
= gfc_current_ns
;
6295 select_type_push (expr1
->symtree
->n
.sym
);
6296 gfc_current_ns
= ns
;
6301 gfc_free_expr (expr1
);
6302 gfc_free_expr (expr2
);
6303 gfc_undo_symbols ();
6304 std::swap (ns
, gfc_current_ns
);
6305 gfc_free_namespace (ns
);
6310 /* Match a CASE statement. */
6313 gfc_match_case (void)
6315 gfc_case
*c
, *head
, *tail
;
6320 if (gfc_current_state () != COMP_SELECT
)
6322 gfc_error ("Unexpected CASE statement at %C");
6326 if (gfc_match ("% default") == MATCH_YES
)
6328 m
= match_case_eos ();
6331 if (m
== MATCH_ERROR
)
6334 new_st
.op
= EXEC_SELECT
;
6335 c
= gfc_get_case ();
6336 c
->where
= gfc_current_locus
;
6337 new_st
.ext
.block
.case_list
= c
;
6341 if (gfc_match_char ('(') != MATCH_YES
)
6346 if (match_case_selector (&c
) == MATCH_ERROR
)
6356 if (gfc_match_char (')') == MATCH_YES
)
6358 if (gfc_match_char (',') != MATCH_YES
)
6362 m
= match_case_eos ();
6365 if (m
== MATCH_ERROR
)
6368 new_st
.op
= EXEC_SELECT
;
6369 new_st
.ext
.block
.case_list
= head
;
6374 gfc_error ("Syntax error in CASE specification at %C");
6377 gfc_free_case_list (head
); /* new_st is cleaned up in parse.c. */
6382 /* Match a TYPE IS statement. */
6385 gfc_match_type_is (void)
6390 if (gfc_current_state () != COMP_SELECT_TYPE
)
6392 gfc_error ("Unexpected TYPE IS statement at %C");
6396 if (gfc_match_char ('(') != MATCH_YES
)
6399 c
= gfc_get_case ();
6400 c
->where
= gfc_current_locus
;
6402 m
= gfc_match_type_spec (&c
->ts
);
6405 if (m
== MATCH_ERROR
)
6408 if (gfc_match_char (')') != MATCH_YES
)
6411 m
= match_case_eos ();
6414 if (m
== MATCH_ERROR
)
6417 new_st
.op
= EXEC_SELECT_TYPE
;
6418 new_st
.ext
.block
.case_list
= c
;
6420 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
6421 && (c
->ts
.u
.derived
->attr
.sequence
6422 || c
->ts
.u
.derived
->attr
.is_bind_c
))
6424 gfc_error ("The type-spec shall not specify a sequence derived "
6425 "type or a type with the BIND attribute in SELECT "
6426 "TYPE at %C [F2003:C815]");
6430 if (c
->ts
.type
== BT_DERIVED
6431 && c
->ts
.u
.derived
&& c
->ts
.u
.derived
->attr
.pdt_type
6432 && gfc_spec_list_type (type_param_spec_list
, c
->ts
.u
.derived
)
6435 gfc_error ("All the LEN type parameters in the TYPE IS statement "
6436 "at %C must be ASSUMED");
6440 /* Create temporary variable. */
6441 select_type_set_tmp (&c
->ts
);
6446 gfc_error ("Syntax error in TYPE IS specification at %C");
6450 gfc_free_case_list (c
); /* new_st is cleaned up in parse.c. */
6455 /* Match a CLASS IS or CLASS DEFAULT statement. */
6458 gfc_match_class_is (void)
6463 if (gfc_current_state () != COMP_SELECT_TYPE
)
6466 if (gfc_match ("% default") == MATCH_YES
)
6468 m
= match_case_eos ();
6471 if (m
== MATCH_ERROR
)
6474 new_st
.op
= EXEC_SELECT_TYPE
;
6475 c
= gfc_get_case ();
6476 c
->where
= gfc_current_locus
;
6477 c
->ts
.type
= BT_UNKNOWN
;
6478 new_st
.ext
.block
.case_list
= c
;
6479 select_type_set_tmp (NULL
);
6483 m
= gfc_match ("% is");
6486 if (m
== MATCH_ERROR
)
6489 if (gfc_match_char ('(') != MATCH_YES
)
6492 c
= gfc_get_case ();
6493 c
->where
= gfc_current_locus
;
6495 m
= match_derived_type_spec (&c
->ts
);
6498 if (m
== MATCH_ERROR
)
6501 if (c
->ts
.type
== BT_DERIVED
)
6502 c
->ts
.type
= BT_CLASS
;
6504 if (gfc_match_char (')') != MATCH_YES
)
6507 m
= match_case_eos ();
6510 if (m
== MATCH_ERROR
)
6513 new_st
.op
= EXEC_SELECT_TYPE
;
6514 new_st
.ext
.block
.case_list
= c
;
6516 /* Create temporary variable. */
6517 select_type_set_tmp (&c
->ts
);
6522 gfc_error ("Syntax error in CLASS IS specification at %C");
6526 gfc_free_case_list (c
); /* new_st is cleaned up in parse.c. */
6531 /********************* WHERE subroutines ********************/
6533 /* Match the rest of a simple WHERE statement that follows an IF statement.
6537 match_simple_where (void)
6543 m
= gfc_match (" ( %e )", &expr
);
6547 m
= gfc_match_assignment ();
6550 if (m
== MATCH_ERROR
)
6553 if (gfc_match_eos () != MATCH_YES
)
6556 c
= gfc_get_code (EXEC_WHERE
);
6559 c
->next
= XCNEW (gfc_code
);
6561 c
->next
->loc
= gfc_current_locus
;
6562 gfc_clear_new_st ();
6564 new_st
.op
= EXEC_WHERE
;
6570 gfc_syntax_error (ST_WHERE
);
6573 gfc_free_expr (expr
);
6578 /* Match a WHERE statement. */
6581 gfc_match_where (gfc_statement
*st
)
6587 m0
= gfc_match_label ();
6588 if (m0
== MATCH_ERROR
)
6591 m
= gfc_match (" where ( %e )", &expr
);
6595 if (gfc_match_eos () == MATCH_YES
)
6597 *st
= ST_WHERE_BLOCK
;
6598 new_st
.op
= EXEC_WHERE
;
6599 new_st
.expr1
= expr
;
6603 m
= gfc_match_assignment ();
6605 gfc_syntax_error (ST_WHERE
);
6609 gfc_free_expr (expr
);
6613 /* We've got a simple WHERE statement. */
6615 c
= gfc_get_code (EXEC_WHERE
);
6618 /* Put in the assignment. It will not be processed by add_statement, so we
6619 need to copy the location here. */
6621 c
->next
= XCNEW (gfc_code
);
6623 c
->next
->loc
= gfc_current_locus
;
6624 gfc_clear_new_st ();
6626 new_st
.op
= EXEC_WHERE
;
6633 /* Match an ELSEWHERE statement. We leave behind a WHERE node in
6634 new_st if successful. */
6637 gfc_match_elsewhere (void)
6639 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
6643 if (gfc_current_state () != COMP_WHERE
)
6645 gfc_error ("ELSEWHERE statement at %C not enclosed in WHERE block");
6651 if (gfc_match_char ('(') == MATCH_YES
)
6653 m
= gfc_match_expr (&expr
);
6656 if (m
== MATCH_ERROR
)
6659 if (gfc_match_char (')') != MATCH_YES
)
6663 if (gfc_match_eos () != MATCH_YES
)
6665 /* Only makes sense if we have a where-construct-name. */
6666 if (!gfc_current_block ())
6671 /* Better be a name at this point. */
6672 m
= gfc_match_name (name
);
6675 if (m
== MATCH_ERROR
)
6678 if (gfc_match_eos () != MATCH_YES
)
6681 if (strcmp (name
, gfc_current_block ()->name
) != 0)
6683 gfc_error ("Label %qs at %C doesn't match WHERE label %qs",
6684 name
, gfc_current_block ()->name
);
6689 new_st
.op
= EXEC_WHERE
;
6690 new_st
.expr1
= expr
;
6694 gfc_syntax_error (ST_ELSEWHERE
);
6697 gfc_free_expr (expr
);