1 /* Declaration statement matcher
2 Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010
3 Free Software Foundation, Inc.
4 Contributed by Andy Vaught
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
28 #include "constructor.h"
30 /* Macros to access allocate memory for gfc_data_variable,
31 gfc_data_value and gfc_data. */
32 #define gfc_get_data_variable() XCNEW (gfc_data_variable)
33 #define gfc_get_data_value() XCNEW (gfc_data_value)
34 #define gfc_get_data() XCNEW (gfc_data)
37 /* This flag is set if an old-style length selector is matched
38 during a type-declaration statement. */
40 static int old_char_selector;
42 /* When variables acquire types and attributes from a declaration
43 statement, they get them from the following static variables. The
44 first part of a declaration sets these variables and the second
45 part copies these into symbol structures. */
47 static gfc_typespec current_ts;
49 static symbol_attribute current_attr;
50 static gfc_array_spec *current_as;
51 static int colon_seen;
53 /* The current binding label (if any). */
54 static char curr_binding_label[GFC_MAX_BINDING_LABEL_LEN + 1];
55 /* Need to know how many identifiers are on the current data declaration
56 line in case we're given the BIND(C) attribute with a NAME= specifier. */
57 static int num_idents_on_line;
58 /* Need to know if a NAME= specifier was found during gfc_match_bind_c so we
59 can supply a name if the curr_binding_label is nil and NAME= was not. */
60 static int has_name_equals = 0;
62 /* Initializer of the previous enumerator. */
64 static gfc_expr *last_initializer;
66 /* History of all the enumerators is maintained, so that
67 kind values of all the enumerators could be updated depending
68 upon the maximum initialized value. */
70 typedef struct enumerator_history
73 gfc_expr *initializer;
74 struct enumerator_history *next;
78 /* Header of enum history chain. */
80 static enumerator_history *enum_history = NULL;
82 /* Pointer of enum history node containing largest initializer. */
84 static enumerator_history *max_enum = NULL;
86 /* gfc_new_block points to the symbol of a newly matched block. */
88 gfc_symbol *gfc_new_block;
90 bool gfc_matching_function;
93 /********************* DATA statement subroutines *********************/
95 static bool in_match_data = false;
98 gfc_in_match_data (void)
100 return in_match_data;
104 set_in_match_data (bool set_value)
106 in_match_data = set_value;
109 /* Free a gfc_data_variable structure and everything beneath it. */
112 free_variable (gfc_data_variable *p)
114 gfc_data_variable *q;
119 gfc_free_expr (p->expr);
120 gfc_free_iterator (&p->iter, 0);
121 free_variable (p->list);
127 /* Free a gfc_data_value structure and everything beneath it. */
130 free_value (gfc_data_value *p)
137 gfc_free_expr (p->expr);
143 /* Free a list of gfc_data structures. */
146 gfc_free_data (gfc_data *p)
153 free_variable (p->var);
154 free_value (p->value);
160 /* Free all data in a namespace. */
163 gfc_free_data_all (gfc_namespace *ns)
176 static match var_element (gfc_data_variable *);
178 /* Match a list of variables terminated by an iterator and a right
182 var_list (gfc_data_variable *parent)
184 gfc_data_variable *tail, var;
187 m = var_element (&var);
188 if (m == MATCH_ERROR)
193 tail = gfc_get_data_variable ();
200 if (gfc_match_char (',') != MATCH_YES)
203 m = gfc_match_iterator (&parent->iter, 1);
206 if (m == MATCH_ERROR)
209 m = var_element (&var);
210 if (m == MATCH_ERROR)
215 tail->next = gfc_get_data_variable ();
221 if (gfc_match_char (')') != MATCH_YES)
226 gfc_syntax_error (ST_DATA);
231 /* Match a single element in a data variable list, which can be a
232 variable-iterator list. */
235 var_element (gfc_data_variable *new_var)
240 memset (new_var, 0, sizeof (gfc_data_variable));
242 if (gfc_match_char ('(') == MATCH_YES)
243 return var_list (new_var);
245 m = gfc_match_variable (&new_var->expr, 0);
249 sym = new_var->expr->symtree->n.sym;
251 /* Symbol should already have an associated type. */
252 if (gfc_check_symbol_typed (sym, gfc_current_ns,
253 false, gfc_current_locus) == FAILURE)
256 if (!sym->attr.function && gfc_current_ns->parent
257 && gfc_current_ns->parent == sym->ns)
259 gfc_error ("Host associated variable '%s' may not be in the DATA "
260 "statement at %C", sym->name);
264 if (gfc_current_state () != COMP_BLOCK_DATA
265 && sym->attr.in_common
266 && gfc_notify_std (GFC_STD_GNU, "Extension: initialization of "
267 "common block variable '%s' in DATA statement at %C",
268 sym->name) == FAILURE)
271 if (gfc_add_data (&sym->attr, sym->name, &new_var->expr->where) == FAILURE)
278 /* Match the top-level list of data variables. */
281 top_var_list (gfc_data *d)
283 gfc_data_variable var, *tail, *new_var;
290 m = var_element (&var);
293 if (m == MATCH_ERROR)
296 new_var = gfc_get_data_variable ();
302 tail->next = new_var;
306 if (gfc_match_char ('/') == MATCH_YES)
308 if (gfc_match_char (',') != MATCH_YES)
315 gfc_syntax_error (ST_DATA);
316 gfc_free_data_all (gfc_current_ns);
322 match_data_constant (gfc_expr **result)
324 char name[GFC_MAX_SYMBOL_LEN + 1];
330 m = gfc_match_literal_constant (&expr, 1);
337 if (m == MATCH_ERROR)
340 m = gfc_match_null (result);
344 old_loc = gfc_current_locus;
346 /* Should this be a structure component, try to match it
347 before matching a name. */
348 m = gfc_match_rvalue (result);
349 if (m == MATCH_ERROR)
352 if (m == MATCH_YES && (*result)->expr_type == EXPR_STRUCTURE)
354 if (gfc_simplify_expr (*result, 0) == FAILURE)
359 gfc_current_locus = old_loc;
361 m = gfc_match_name (name);
365 if (gfc_find_symbol (name, NULL, 1, &sym))
369 || (sym->attr.flavor != FL_PARAMETER && sym->attr.flavor != FL_DERIVED))
371 gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C",
375 else if (sym->attr.flavor == FL_DERIVED)
376 return gfc_match_structure_constructor (sym, result, false);
378 /* Check to see if the value is an initialization array expression. */
379 if (sym->value->expr_type == EXPR_ARRAY)
381 gfc_current_locus = old_loc;
383 m = gfc_match_init_expr (result);
384 if (m == MATCH_ERROR)
389 if (gfc_simplify_expr (*result, 0) == FAILURE)
392 if ((*result)->expr_type == EXPR_CONSTANT)
396 gfc_error ("Invalid initializer %s in Data statement at %C", name);
402 *result = gfc_copy_expr (sym->value);
407 /* Match a list of values in a DATA statement. The leading '/' has
408 already been seen at this point. */
411 top_val_list (gfc_data *data)
413 gfc_data_value *new_val, *tail;
421 m = match_data_constant (&expr);
424 if (m == MATCH_ERROR)
427 new_val = gfc_get_data_value ();
428 mpz_init (new_val->repeat);
431 data->value = new_val;
433 tail->next = new_val;
437 if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES)
440 mpz_set_ui (tail->repeat, 1);
444 if (expr->ts.type == BT_INTEGER)
445 mpz_set (tail->repeat, expr->value.integer);
446 gfc_free_expr (expr);
448 m = match_data_constant (&tail->expr);
451 if (m == MATCH_ERROR)
455 if (gfc_match_char ('/') == MATCH_YES)
457 if (gfc_match_char (',') == MATCH_NO)
464 gfc_syntax_error (ST_DATA);
465 gfc_free_data_all (gfc_current_ns);
470 /* Matches an old style initialization. */
473 match_old_style_init (const char *name)
480 /* Set up data structure to hold initializers. */
481 gfc_find_sym_tree (name, NULL, 0, &st);
484 newdata = gfc_get_data ();
485 newdata->var = gfc_get_data_variable ();
486 newdata->var->expr = gfc_get_variable_expr (st);
487 newdata->where = gfc_current_locus;
489 /* Match initial value list. This also eats the terminal '/'. */
490 m = top_val_list (newdata);
499 gfc_error ("Initialization at %C is not allowed in a PURE procedure");
504 /* Mark the variable as having appeared in a data statement. */
505 if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE)
511 /* Chain in namespace list of DATA initializers. */
512 newdata->next = gfc_current_ns->data;
513 gfc_current_ns->data = newdata;
519 /* Match the stuff following a DATA statement. If ERROR_FLAG is set,
520 we are matching a DATA statement and are therefore issuing an error
521 if we encounter something unexpected, if not, we're trying to match
522 an old-style initialization expression of the form INTEGER I /2/. */
525 gfc_match_data (void)
530 set_in_match_data (true);
534 new_data = gfc_get_data ();
535 new_data->where = gfc_current_locus;
537 m = top_var_list (new_data);
541 m = top_val_list (new_data);
545 new_data->next = gfc_current_ns->data;
546 gfc_current_ns->data = new_data;
548 if (gfc_match_eos () == MATCH_YES)
551 gfc_match_char (','); /* Optional comma */
554 set_in_match_data (false);
558 gfc_error ("DATA statement at %C is not allowed in a PURE procedure");
565 set_in_match_data (false);
566 gfc_free_data (new_data);
571 /************************ Declaration statements *********************/
574 /* Auxilliary function to merge DIMENSION and CODIMENSION array specs. */
577 merge_array_spec (gfc_array_spec *from, gfc_array_spec *to, bool copy)
581 if (to->rank == 0 && from->rank > 0)
583 to->rank = from->rank;
584 to->type = from->type;
585 to->cray_pointee = from->cray_pointee;
586 to->cp_was_assumed = from->cp_was_assumed;
588 for (i = 0; i < to->corank; i++)
590 to->lower[from->rank + i] = to->lower[i];
591 to->upper[from->rank + i] = to->upper[i];
593 for (i = 0; i < from->rank; i++)
597 to->lower[i] = gfc_copy_expr (from->lower[i]);
598 to->upper[i] = gfc_copy_expr (from->upper[i]);
602 to->lower[i] = from->lower[i];
603 to->upper[i] = from->upper[i];
607 else if (to->corank == 0 && from->corank > 0)
609 to->corank = from->corank;
610 to->cotype = from->cotype;
612 for (i = 0; i < from->corank; i++)
616 to->lower[to->rank + i] = gfc_copy_expr (from->lower[i]);
617 to->upper[to->rank + i] = gfc_copy_expr (from->upper[i]);
621 to->lower[to->rank + i] = from->lower[i];
622 to->upper[to->rank + i] = from->upper[i];
629 /* Match an intent specification. Since this can only happen after an
630 INTENT word, a legal intent-spec must follow. */
633 match_intent_spec (void)
636 if (gfc_match (" ( in out )") == MATCH_YES)
638 if (gfc_match (" ( in )") == MATCH_YES)
640 if (gfc_match (" ( out )") == MATCH_YES)
643 gfc_error ("Bad INTENT specification at %C");
644 return INTENT_UNKNOWN;
648 /* Matches a character length specification, which is either a
649 specification expression or a '*'. */
652 char_len_param_value (gfc_expr **expr)
656 if (gfc_match_char ('*') == MATCH_YES)
662 m = gfc_match_expr (expr);
665 && gfc_expr_check_typed (*expr, gfc_current_ns, false) == FAILURE)
668 if (m == MATCH_YES && (*expr)->expr_type == EXPR_FUNCTION)
670 if ((*expr)->value.function.actual
671 && (*expr)->value.function.actual->expr->symtree)
674 e = (*expr)->value.function.actual->expr;
675 if (e->symtree->n.sym->attr.flavor == FL_PROCEDURE
676 && e->expr_type == EXPR_VARIABLE)
678 if (e->symtree->n.sym->ts.type == BT_UNKNOWN)
680 if (e->symtree->n.sym->ts.type == BT_CHARACTER
681 && e->symtree->n.sym->ts.u.cl
682 && e->symtree->n.sym->ts.u.cl->length->ts.type == BT_UNKNOWN)
690 gfc_error ("Conflict in attributes of function argument at %C");
695 /* A character length is a '*' followed by a literal integer or a
696 char_len_param_value in parenthesis. */
699 match_char_length (gfc_expr **expr)
704 m = gfc_match_char ('*');
708 m = gfc_match_small_literal_int (&length, NULL);
709 if (m == MATCH_ERROR)
714 if (gfc_notify_std (GFC_STD_F95_OBS, "Obsolescent feature: "
715 "Old-style character length at %C") == FAILURE)
717 *expr = gfc_get_int_expr (gfc_default_integer_kind, NULL, length);
721 if (gfc_match_char ('(') == MATCH_NO)
724 m = char_len_param_value (expr);
725 if (m != MATCH_YES && gfc_matching_function)
731 if (m == MATCH_ERROR)
736 if (gfc_match_char (')') == MATCH_NO)
738 gfc_free_expr (*expr);
746 gfc_error ("Syntax error in character length specification at %C");
751 /* Special subroutine for finding a symbol. Check if the name is found
752 in the current name space. If not, and we're compiling a function or
753 subroutine and the parent compilation unit is an interface, then check
754 to see if the name we've been given is the name of the interface
755 (located in another namespace). */
758 find_special (const char *name, gfc_symbol **result, bool allow_subroutine)
764 i = gfc_get_sym_tree (name, NULL, &st, allow_subroutine);
767 *result = st ? st->n.sym : NULL;
771 if (gfc_current_state () != COMP_SUBROUTINE
772 && gfc_current_state () != COMP_FUNCTION)
775 s = gfc_state_stack->previous;
779 if (s->state != COMP_INTERFACE)
782 goto end; /* Nameless interface. */
784 if (strcmp (name, s->sym->name) == 0)
795 /* Special subroutine for getting a symbol node associated with a
796 procedure name, used in SUBROUTINE and FUNCTION statements. The
797 symbol is created in the parent using with symtree node in the
798 child unit pointing to the symbol. If the current namespace has no
799 parent, then the symbol is just created in the current unit. */
802 get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry)
808 /* Module functions have to be left in their own namespace because
809 they have potentially (almost certainly!) already been referenced.
810 In this sense, they are rather like external functions. This is
811 fixed up in resolve.c(resolve_entries), where the symbol name-
812 space is set to point to the master function, so that the fake
813 result mechanism can work. */
814 if (module_fcn_entry)
816 /* Present if entry is declared to be a module procedure. */
817 rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result);
820 rc = gfc_get_symbol (name, NULL, result);
821 else if (!gfc_get_symbol (name, NULL, &sym) && sym
822 && (*result)->ts.type == BT_UNKNOWN
823 && sym->attr.flavor == FL_UNKNOWN)
824 /* Pick up the typespec for the entry, if declared in the function
825 body. Note that this symbol is FL_UNKNOWN because it will
826 only have appeared in a type declaration. The local symtree
827 is set to point to the module symbol and a unique symtree
828 to the local version. This latter ensures a correct clearing
831 /* If the ENTRY proceeds its specification, we need to ensure
832 that this does not raise a "has no IMPLICIT type" error. */
833 if (sym->ts.type == BT_UNKNOWN)
834 sym->attr.untyped = 1;
836 (*result)->ts = sym->ts;
838 /* Put the symbol in the procedure namespace so that, should
839 the ENTRY precede its specification, the specification
841 (*result)->ns = gfc_current_ns;
843 gfc_find_sym_tree (name, gfc_current_ns, 0, &st);
845 st = gfc_get_unique_symtree (gfc_current_ns);
850 rc = gfc_get_symbol (name, gfc_current_ns->parent, result);
856 gfc_current_ns->refs++;
858 if (sym && !sym->gfc_new && gfc_current_state () != COMP_INTERFACE)
860 /* Trap another encompassed procedure with the same name. All
861 these conditions are necessary to avoid picking up an entry
862 whose name clashes with that of the encompassing procedure;
863 this is handled using gsymbols to register unique,globally
865 if (sym->attr.flavor != 0
866 && sym->attr.proc != 0
867 && (sym->attr.subroutine || sym->attr.function)
868 && sym->attr.if_source != IFSRC_UNKNOWN)
869 gfc_error_now ("Procedure '%s' at %C is already defined at %L",
870 name, &sym->declared_at);
872 /* Trap a procedure with a name the same as interface in the
873 encompassing scope. */
874 if (sym->attr.generic != 0
875 && (sym->attr.subroutine || sym->attr.function)
876 && !sym->attr.mod_proc)
877 gfc_error_now ("Name '%s' at %C is already defined"
878 " as a generic interface at %L",
879 name, &sym->declared_at);
881 /* Trap declarations of attributes in encompassing scope. The
882 signature for this is that ts.kind is set. Legitimate
883 references only set ts.type. */
884 if (sym->ts.kind != 0
885 && !sym->attr.implicit_type
886 && sym->attr.proc == 0
887 && gfc_current_ns->parent != NULL
888 && sym->attr.access == 0
889 && !module_fcn_entry)
890 gfc_error_now ("Procedure '%s' at %C has an explicit interface "
891 "and must not have attributes declared at %L",
892 name, &sym->declared_at);
895 if (gfc_current_ns->parent == NULL || *result == NULL)
898 /* Module function entries will already have a symtree in
899 the current namespace but will need one at module level. */
900 if (module_fcn_entry)
902 /* Present if entry is declared to be a module procedure. */
903 rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st);
905 st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name);
908 st = gfc_new_symtree (&gfc_current_ns->sym_root, name);
913 /* See if the procedure should be a module procedure. */
915 if (((sym->ns->proc_name != NULL
916 && sym->ns->proc_name->attr.flavor == FL_MODULE
917 && sym->attr.proc != PROC_MODULE)
918 || (module_fcn_entry && sym->attr.proc != PROC_MODULE))
919 && gfc_add_procedure (&sym->attr, PROC_MODULE,
920 sym->name, NULL) == FAILURE)
927 /* Verify that the given symbol representing a parameter is C
928 interoperable, by checking to see if it was marked as such after
929 its declaration. If the given symbol is not interoperable, a
930 warning is reported, thus removing the need to return the status to
931 the calling function. The standard does not require the user use
932 one of the iso_c_binding named constants to declare an
933 interoperable parameter, but we can't be sure if the param is C
934 interop or not if the user doesn't. For example, integer(4) may be
935 legal Fortran, but doesn't have meaning in C. It may interop with
936 a number of the C types, which causes a problem because the
937 compiler can't know which one. This code is almost certainly not
938 portable, and the user will get what they deserve if the C type
939 across platforms isn't always interoperable with integer(4). If
940 the user had used something like integer(c_int) or integer(c_long),
941 the compiler could have automatically handled the varying sizes
945 verify_c_interop_param (gfc_symbol *sym)
947 int is_c_interop = 0;
948 gfc_try retval = SUCCESS;
950 /* We check implicitly typed variables in symbol.c:gfc_set_default_type().
951 Don't repeat the checks here. */
952 if (sym->attr.implicit_type)
955 /* For subroutines or functions that are passed to a BIND(C) procedure,
956 they're interoperable if they're BIND(C) and their params are all
958 if (sym->attr.flavor == FL_PROCEDURE)
960 if (sym->attr.is_bind_c == 0)
962 gfc_error_now ("Procedure '%s' at %L must have the BIND(C) "
963 "attribute to be C interoperable", sym->name,
964 &(sym->declared_at));
970 if (sym->attr.is_c_interop == 1)
971 /* We've already checked this procedure; don't check it again. */
974 return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common,
979 /* See if we've stored a reference to a procedure that owns sym. */
980 if (sym->ns != NULL && sym->ns->proc_name != NULL)
982 if (sym->ns->proc_name->attr.is_bind_c == 1)
985 (verify_c_interop (&(sym->ts))
988 if (is_c_interop != 1)
990 /* Make personalized messages to give better feedback. */
991 if (sym->ts.type == BT_DERIVED)
992 gfc_error ("Type '%s' at %L is a parameter to the BIND(C) "
993 " procedure '%s' but is not C interoperable "
994 "because derived type '%s' is not C interoperable",
995 sym->name, &(sym->declared_at),
996 sym->ns->proc_name->name,
997 sym->ts.u.derived->name);
999 gfc_warning ("Variable '%s' at %L is a parameter to the "
1000 "BIND(C) procedure '%s' but may not be C "
1002 sym->name, &(sym->declared_at),
1003 sym->ns->proc_name->name);
1006 /* Character strings are only C interoperable if they have a
1008 if (sym->ts.type == BT_CHARACTER)
1010 gfc_charlen *cl = sym->ts.u.cl;
1011 if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT
1012 || mpz_cmp_si (cl->length->value.integer, 1) != 0)
1014 gfc_error ("Character argument '%s' at %L "
1015 "must be length 1 because "
1016 "procedure '%s' is BIND(C)",
1017 sym->name, &sym->declared_at,
1018 sym->ns->proc_name->name);
1023 /* We have to make sure that any param to a bind(c) routine does
1024 not have the allocatable, pointer, or optional attributes,
1025 according to J3/04-007, section 5.1. */
1026 if (sym->attr.allocatable == 1)
1028 gfc_error ("Variable '%s' at %L cannot have the "
1029 "ALLOCATABLE attribute because procedure '%s'"
1030 " is BIND(C)", sym->name, &(sym->declared_at),
1031 sym->ns->proc_name->name);
1035 if (sym->attr.pointer == 1)
1037 gfc_error ("Variable '%s' at %L cannot have the "
1038 "POINTER attribute because procedure '%s'"
1039 " is BIND(C)", sym->name, &(sym->declared_at),
1040 sym->ns->proc_name->name);
1044 if (sym->attr.optional == 1)
1046 gfc_error ("Variable '%s' at %L cannot have the "
1047 "OPTIONAL attribute because procedure '%s'"
1048 " is BIND(C)", sym->name, &(sym->declared_at),
1049 sym->ns->proc_name->name);
1053 /* Make sure that if it has the dimension attribute, that it is
1054 either assumed size or explicit shape. */
1055 if (sym->as != NULL)
1057 if (sym->as->type == AS_ASSUMED_SHAPE)
1059 gfc_error ("Assumed-shape array '%s' at %L cannot be an "
1060 "argument to the procedure '%s' at %L because "
1061 "the procedure is BIND(C)", sym->name,
1062 &(sym->declared_at), sym->ns->proc_name->name,
1063 &(sym->ns->proc_name->declared_at));
1067 if (sym->as->type == AS_DEFERRED)
1069 gfc_error ("Deferred-shape array '%s' at %L cannot be an "
1070 "argument to the procedure '%s' at %L because "
1071 "the procedure is BIND(C)", sym->name,
1072 &(sym->declared_at), sym->ns->proc_name->name,
1073 &(sym->ns->proc_name->declared_at));
1085 /* Function called by variable_decl() that adds a name to the symbol table. */
1088 build_sym (const char *name, gfc_charlen *cl,
1089 gfc_array_spec **as, locus *var_locus)
1091 symbol_attribute attr;
1094 if (gfc_get_symbol (name, NULL, &sym))
1097 /* Start updating the symbol table. Add basic type attribute if present. */
1098 if (current_ts.type != BT_UNKNOWN
1099 && (sym->attr.implicit_type == 0
1100 || !gfc_compare_types (&sym->ts, ¤t_ts))
1101 && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE)
1104 if (sym->ts.type == BT_CHARACTER)
1107 /* Add dimension attribute if present. */
1108 if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE)
1112 /* Add attribute to symbol. The copy is so that we can reset the
1113 dimension attribute. */
1114 attr = current_attr;
1116 attr.codimension = 0;
1118 if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE)
1121 /* Finish any work that may need to be done for the binding label,
1122 if it's a bind(c). The bind(c) attr is found before the symbol
1123 is made, and before the symbol name (for data decls), so the
1124 current_ts is holding the binding label, or nothing if the
1125 name= attr wasn't given. Therefore, test here if we're dealing
1126 with a bind(c) and make sure the binding label is set correctly. */
1127 if (sym->attr.is_bind_c == 1)
1129 if (sym->binding_label[0] == '\0')
1131 /* Set the binding label and verify that if a NAME= was specified
1132 then only one identifier was in the entity-decl-list. */
1133 if (set_binding_label (sym->binding_label, sym->name,
1134 num_idents_on_line) == FAILURE)
1139 /* See if we know we're in a common block, and if it's a bind(c)
1140 common then we need to make sure we're an interoperable type. */
1141 if (sym->attr.in_common == 1)
1143 /* Test the common block object. */
1144 if (sym->common_block != NULL && sym->common_block->is_bind_c == 1
1145 && sym->ts.is_c_interop != 1)
1147 gfc_error_now ("Variable '%s' in common block '%s' at %C "
1148 "must be declared with a C interoperable "
1149 "kind since common block '%s' is BIND(C)",
1150 sym->name, sym->common_block->name,
1151 sym->common_block->name);
1156 sym->attr.implied_index = 0;
1158 if (sym->ts.type == BT_CLASS)
1160 sym->attr.class_ok = (sym->attr.dummy
1161 || sym->attr.pointer
1162 || sym->attr.allocatable) ? 1 : 0;
1163 gfc_build_class_symbol (&sym->ts, &sym->attr, &sym->as, false);
1170 /* Set character constant to the given length. The constant will be padded or
1171 truncated. If we're inside an array constructor without a typespec, we
1172 additionally check that all elements have the same length; check_len -1
1173 means no checking. */
1176 gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len)
1181 gcc_assert (expr->expr_type == EXPR_CONSTANT);
1182 gcc_assert (expr->ts.type == BT_CHARACTER);
1184 slen = expr->value.character.length;
1187 s = gfc_get_wide_string (len + 1);
1188 memcpy (s, expr->value.character.string,
1189 MIN (len, slen) * sizeof (gfc_char_t));
1191 gfc_wide_memset (&s[slen], ' ', len - slen);
1193 if (gfc_option.warn_character_truncation && slen > len)
1194 gfc_warning_now ("CHARACTER expression at %L is being truncated "
1195 "(%d/%d)", &expr->where, slen, len);
1197 /* Apply the standard by 'hand' otherwise it gets cleared for
1199 if (check_len != -1 && slen != check_len
1200 && !(gfc_option.allow_std & GFC_STD_GNU))
1201 gfc_error_now ("The CHARACTER elements of the array constructor "
1202 "at %L must have the same length (%d/%d)",
1203 &expr->where, slen, check_len);
1206 gfc_free (expr->value.character.string);
1207 expr->value.character.string = s;
1208 expr->value.character.length = len;
1213 /* Function to create and update the enumerator history
1214 using the information passed as arguments.
1215 Pointer "max_enum" is also updated, to point to
1216 enum history node containing largest initializer.
1218 SYM points to the symbol node of enumerator.
1219 INIT points to its enumerator value. */
1222 create_enum_history (gfc_symbol *sym, gfc_expr *init)
1224 enumerator_history *new_enum_history;
1225 gcc_assert (sym != NULL && init != NULL);
1227 new_enum_history = XCNEW (enumerator_history);
1229 new_enum_history->sym = sym;
1230 new_enum_history->initializer = init;
1231 new_enum_history->next = NULL;
1233 if (enum_history == NULL)
1235 enum_history = new_enum_history;
1236 max_enum = enum_history;
1240 new_enum_history->next = enum_history;
1241 enum_history = new_enum_history;
1243 if (mpz_cmp (max_enum->initializer->value.integer,
1244 new_enum_history->initializer->value.integer) < 0)
1245 max_enum = new_enum_history;
1250 /* Function to free enum kind history. */
1253 gfc_free_enum_history (void)
1255 enumerator_history *current = enum_history;
1256 enumerator_history *next;
1258 while (current != NULL)
1260 next = current->next;
1265 enum_history = NULL;
1269 /* Function called by variable_decl() that adds an initialization
1270 expression to a symbol. */
1273 add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus)
1275 symbol_attribute attr;
1280 if (find_special (name, &sym, false))
1285 /* If this symbol is confirming an implicit parameter type,
1286 then an initialization expression is not allowed. */
1287 if (attr.flavor == FL_PARAMETER
1288 && sym->value != NULL
1291 gfc_error ("Initializer not allowed for PARAMETER '%s' at %C",
1298 /* An initializer is required for PARAMETER declarations. */
1299 if (attr.flavor == FL_PARAMETER)
1301 gfc_error ("PARAMETER at %L is missing an initializer", var_locus);
1307 /* If a variable appears in a DATA block, it cannot have an
1311 gfc_error ("Variable '%s' at %C with an initializer already "
1312 "appears in a DATA statement", sym->name);
1316 /* Check if the assignment can happen. This has to be put off
1317 until later for a derived type variable. */
1318 if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED
1319 && sym->ts.type != BT_CLASS && init->ts.type != BT_CLASS
1320 && gfc_check_assign_symbol (sym, init) == FAILURE)
1323 if (sym->ts.type == BT_CHARACTER && sym->ts.u.cl
1324 && init->ts.type == BT_CHARACTER)
1326 /* Update symbol character length according initializer. */
1327 if (gfc_check_assign_symbol (sym, init) == FAILURE)
1330 if (sym->ts.u.cl->length == NULL)
1333 /* If there are multiple CHARACTER variables declared on the
1334 same line, we don't want them to share the same length. */
1335 sym->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
1337 if (sym->attr.flavor == FL_PARAMETER)
1339 if (init->expr_type == EXPR_CONSTANT)
1341 clen = init->value.character.length;
1342 sym->ts.u.cl->length
1343 = gfc_get_int_expr (gfc_default_integer_kind,
1346 else if (init->expr_type == EXPR_ARRAY)
1349 c = gfc_constructor_first (init->value.constructor);
1350 clen = c->expr->value.character.length;
1351 sym->ts.u.cl->length
1352 = gfc_get_int_expr (gfc_default_integer_kind,
1355 else if (init->ts.u.cl && init->ts.u.cl->length)
1356 sym->ts.u.cl->length =
1357 gfc_copy_expr (sym->value->ts.u.cl->length);
1360 /* Update initializer character length according symbol. */
1361 else if (sym->ts.u.cl->length->expr_type == EXPR_CONSTANT)
1363 int len = mpz_get_si (sym->ts.u.cl->length->value.integer);
1365 if (init->expr_type == EXPR_CONSTANT)
1366 gfc_set_constant_character_len (len, init, -1);
1367 else if (init->expr_type == EXPR_ARRAY)
1371 /* Build a new charlen to prevent simplification from
1372 deleting the length before it is resolved. */
1373 init->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
1374 init->ts.u.cl->length = gfc_copy_expr (sym->ts.u.cl->length);
1376 for (c = gfc_constructor_first (init->value.constructor);
1377 c; c = gfc_constructor_next (c))
1378 gfc_set_constant_character_len (len, c->expr, -1);
1383 /* Need to check if the expression we initialized this
1384 to was one of the iso_c_binding named constants. If so,
1385 and we're a parameter (constant), let it be iso_c.
1387 integer(c_int), parameter :: my_int = c_int
1388 integer(my_int) :: my_int_2
1389 If we mark my_int as iso_c (since we can see it's value
1390 is equal to one of the named constants), then my_int_2
1391 will be considered C interoperable. */
1392 if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED)
1394 sym->ts.is_iso_c |= init->ts.is_iso_c;
1395 sym->ts.is_c_interop |= init->ts.is_c_interop;
1396 /* attr bits needed for module files. */
1397 sym->attr.is_iso_c |= init->ts.is_iso_c;
1398 sym->attr.is_c_interop |= init->ts.is_c_interop;
1399 if (init->ts.is_iso_c)
1400 sym->ts.f90_type = init->ts.f90_type;
1403 /* Add initializer. Make sure we keep the ranks sane. */
1404 if (sym->attr.dimension && init->rank == 0)
1409 if (sym->attr.flavor == FL_PARAMETER
1410 && init->expr_type == EXPR_CONSTANT
1411 && spec_size (sym->as, &size) == SUCCESS
1412 && mpz_cmp_si (size, 0) > 0)
1414 array = gfc_get_array_expr (init->ts.type, init->ts.kind,
1416 for (n = 0; n < (int)mpz_get_si (size); n++)
1417 gfc_constructor_append_expr (&array->value.constructor,
1420 : gfc_copy_expr (init),
1423 array->shape = gfc_get_shape (sym->as->rank);
1424 for (n = 0; n < sym->as->rank; n++)
1425 spec_dimen_size (sym->as, n, &array->shape[n]);
1430 init->rank = sym->as->rank;
1434 if (sym->attr.save == SAVE_NONE)
1435 sym->attr.save = SAVE_IMPLICIT;
1443 /* Function called by variable_decl() that adds a name to a structure
1447 build_struct (const char *name, gfc_charlen *cl, gfc_expr **init,
1448 gfc_array_spec **as)
1451 gfc_try t = SUCCESS;
1453 /* F03:C438/C439. If the current symbol is of the same derived type that we're
1454 constructing, it must have the pointer attribute. */
1455 if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS)
1456 && current_ts.u.derived == gfc_current_block ()
1457 && current_attr.pointer == 0)
1459 gfc_error ("Component at %C must have the POINTER attribute");
1463 if (gfc_current_block ()->attr.pointer && (*as)->rank != 0)
1465 if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT)
1467 gfc_error ("Array component of structure at %C must have explicit "
1468 "or deferred shape");
1473 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
1477 if (c->ts.type == BT_CHARACTER)
1479 c->attr = current_attr;
1481 c->initializer = *init;
1488 c->attr.codimension = 1;
1490 c->attr.dimension = 1;
1494 /* Should this ever get more complicated, combine with similar section
1495 in add_init_expr_to_sym into a separate function. */
1496 if (c->ts.type == BT_CHARACTER && !c->attr.pointer && c->initializer && c->ts.u.cl
1497 && c->ts.u.cl->length && c->ts.u.cl->length->expr_type == EXPR_CONSTANT)
1501 gcc_assert (c->ts.u.cl && c->ts.u.cl->length);
1502 gcc_assert (c->ts.u.cl->length->expr_type == EXPR_CONSTANT);
1503 gcc_assert (c->ts.u.cl->length->ts.type == BT_INTEGER);
1505 len = mpz_get_si (c->ts.u.cl->length->value.integer);
1507 if (c->initializer->expr_type == EXPR_CONSTANT)
1508 gfc_set_constant_character_len (len, c->initializer, -1);
1509 else if (mpz_cmp (c->ts.u.cl->length->value.integer,
1510 c->initializer->ts.u.cl->length->value.integer))
1512 gfc_constructor *ctor;
1513 ctor = gfc_constructor_first (c->initializer->value.constructor);
1518 bool has_ts = (c->initializer->ts.u.cl
1519 && c->initializer->ts.u.cl->length_from_typespec);
1521 /* Remember the length of the first element for checking
1522 that all elements *in the constructor* have the same
1523 length. This need not be the length of the LHS! */
1524 gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT);
1525 gcc_assert (ctor->expr->ts.type == BT_CHARACTER);
1526 first_len = ctor->expr->value.character.length;
1528 for ( ; ctor; ctor = gfc_constructor_next (ctor))
1529 if (ctor->expr->expr_type == EXPR_CONSTANT)
1531 gfc_set_constant_character_len (len, ctor->expr,
1532 has_ts ? -1 : first_len);
1533 ctor->expr->ts.u.cl->length = gfc_copy_expr (c->ts.u.cl->length);
1539 /* Check array components. */
1540 if (!c->attr.dimension)
1543 if (c->attr.pointer)
1545 if (c->as->type != AS_DEFERRED)
1547 gfc_error ("Pointer array component of structure at %C must have a "
1552 else if (c->attr.allocatable)
1554 if (c->as->type != AS_DEFERRED)
1556 gfc_error ("Allocatable component of structure at %C must have a "
1563 if (c->as->type != AS_EXPLICIT)
1565 gfc_error ("Array component of structure at %C must have an "
1572 if (c->ts.type == BT_CLASS)
1573 gfc_build_class_symbol (&c->ts, &c->attr, &c->as, true);
1579 /* Match a 'NULL()', and possibly take care of some side effects. */
1582 gfc_match_null (gfc_expr **result)
1587 m = gfc_match (" null ( )");
1591 /* The NULL symbol now has to be/become an intrinsic function. */
1592 if (gfc_get_symbol ("null", NULL, &sym))
1594 gfc_error ("NULL() initialization at %C is ambiguous");
1598 gfc_intrinsic_symbol (sym);
1600 if (sym->attr.proc != PROC_INTRINSIC
1601 && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC,
1602 sym->name, NULL) == FAILURE
1603 || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE))
1606 *result = gfc_get_null_expr (&gfc_current_locus);
1612 /* Match a variable name with an optional initializer. When this
1613 subroutine is called, a variable is expected to be parsed next.
1614 Depending on what is happening at the moment, updates either the
1615 symbol table or the current interface. */
1618 variable_decl (int elem)
1620 char name[GFC_MAX_SYMBOL_LEN + 1];
1621 gfc_expr *initializer, *char_len;
1623 gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */
1634 /* When we get here, we've just matched a list of attributes and
1635 maybe a type and a double colon. The next thing we expect to see
1636 is the name of the symbol. */
1637 m = gfc_match_name (name);
1641 var_locus = gfc_current_locus;
1643 /* Now we could see the optional array spec. or character length. */
1644 m = gfc_match_array_spec (&as, true, true);
1645 if (gfc_option.flag_cray_pointer && m == MATCH_YES)
1646 cp_as = gfc_copy_array_spec (as);
1647 else if (m == MATCH_ERROR)
1651 as = gfc_copy_array_spec (current_as);
1652 else if (current_as)
1653 merge_array_spec (current_as, as, true);
1658 if (current_ts.type == BT_CHARACTER)
1660 switch (match_char_length (&char_len))
1663 cl = gfc_new_charlen (gfc_current_ns, NULL);
1665 cl->length = char_len;
1668 /* Non-constant lengths need to be copied after the first
1669 element. Also copy assumed lengths. */
1672 && (current_ts.u.cl->length == NULL
1673 || current_ts.u.cl->length->expr_type != EXPR_CONSTANT))
1675 cl = gfc_new_charlen (gfc_current_ns, NULL);
1676 cl->length = gfc_copy_expr (current_ts.u.cl->length);
1679 cl = current_ts.u.cl;
1688 /* If this symbol has already shown up in a Cray Pointer declaration,
1689 then we want to set the type & bail out. */
1690 if (gfc_option.flag_cray_pointer)
1692 gfc_find_symbol (name, gfc_current_ns, 1, &sym);
1693 if (sym != NULL && sym->attr.cray_pointee)
1695 sym->ts.type = current_ts.type;
1696 sym->ts.kind = current_ts.kind;
1698 sym->ts.u.derived = current_ts.u.derived;
1699 sym->ts.is_c_interop = current_ts.is_c_interop;
1700 sym->ts.is_iso_c = current_ts.is_iso_c;
1703 /* Check to see if we have an array specification. */
1706 if (sym->as != NULL)
1708 gfc_error ("Duplicate array spec for Cray pointee at %C");
1709 gfc_free_array_spec (cp_as);
1715 if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE)
1716 gfc_internal_error ("Couldn't set pointee array spec.");
1718 /* Fix the array spec. */
1719 m = gfc_mod_pointee_as (sym->as);
1720 if (m == MATCH_ERROR)
1728 gfc_free_array_spec (cp_as);
1732 /* Procedure pointer as function result. */
1733 if (gfc_current_state () == COMP_FUNCTION
1734 && strcmp ("ppr@", gfc_current_block ()->name) == 0
1735 && strcmp (name, gfc_current_block ()->ns->proc_name->name) == 0)
1736 strcpy (name, "ppr@");
1738 if (gfc_current_state () == COMP_FUNCTION
1739 && strcmp (name, gfc_current_block ()->name) == 0
1740 && gfc_current_block ()->result
1741 && strcmp ("ppr@", gfc_current_block ()->result->name) == 0)
1742 strcpy (name, "ppr@");
1744 /* OK, we've successfully matched the declaration. Now put the
1745 symbol in the current namespace, because it might be used in the
1746 optional initialization expression for this symbol, e.g. this is
1749 integer, parameter :: i = huge(i)
1751 This is only true for parameters or variables of a basic type.
1752 For components of derived types, it is not true, so we don't
1753 create a symbol for those yet. If we fail to create the symbol,
1755 if (gfc_current_state () != COMP_DERIVED
1756 && build_sym (name, cl, &as, &var_locus) == FAILURE)
1762 /* An interface body specifies all of the procedure's
1763 characteristics and these shall be consistent with those
1764 specified in the procedure definition, except that the interface
1765 may specify a procedure that is not pure if the procedure is
1766 defined to be pure(12.3.2). */
1767 if (current_ts.type == BT_DERIVED
1768 && gfc_current_ns->proc_name
1769 && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY
1770 && current_ts.u.derived->ns != gfc_current_ns)
1773 st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.u.derived->name);
1774 if (!(current_ts.u.derived->attr.imported
1776 && st->n.sym == current_ts.u.derived)
1777 && !gfc_current_ns->has_import_set)
1779 gfc_error ("the type of '%s' at %C has not been declared within the "
1786 /* In functions that have a RESULT variable defined, the function
1787 name always refers to function calls. Therefore, the name is
1788 not allowed to appear in specification statements. */
1789 if (gfc_current_state () == COMP_FUNCTION
1790 && gfc_current_block () != NULL
1791 && gfc_current_block ()->result != NULL
1792 && gfc_current_block ()->result != gfc_current_block ()
1793 && strcmp (gfc_current_block ()->name, name) == 0)
1795 gfc_error ("Function name '%s' not allowed at %C", name);
1800 /* We allow old-style initializations of the form
1801 integer i /2/, j(4) /3*3, 1/
1802 (if no colon has been seen). These are different from data
1803 statements in that initializers are only allowed to apply to the
1804 variable immediately preceding, i.e.
1806 is not allowed. Therefore we have to do some work manually, that
1807 could otherwise be left to the matchers for DATA statements. */
1809 if (!colon_seen && gfc_match (" /") == MATCH_YES)
1811 if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style "
1812 "initialization at %C") == FAILURE)
1815 return match_old_style_init (name);
1818 /* The double colon must be present in order to have initializers.
1819 Otherwise the statement is ambiguous with an assignment statement. */
1822 if (gfc_match (" =>") == MATCH_YES)
1824 if (!current_attr.pointer)
1826 gfc_error ("Initialization at %C isn't for a pointer variable");
1831 m = gfc_match_null (&initializer);
1834 gfc_error ("Pointer initialization requires a NULL() at %C");
1838 if (gfc_pure (NULL) && gfc_state_stack->state != COMP_DERIVED)
1840 gfc_error ("Initialization of pointer at %C is not allowed in "
1841 "a PURE procedure");
1849 else if (gfc_match_char ('=') == MATCH_YES)
1851 if (current_attr.pointer)
1853 gfc_error ("Pointer initialization at %C requires '=>', "
1859 m = gfc_match_init_expr (&initializer);
1862 gfc_error ("Expected an initialization expression at %C");
1866 if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL)
1867 && gfc_state_stack->state != COMP_DERIVED)
1869 gfc_error ("Initialization of variable at %C is not allowed in "
1870 "a PURE procedure");
1879 if (initializer != NULL && current_attr.allocatable
1880 && gfc_current_state () == COMP_DERIVED)
1882 gfc_error ("Initialization of allocatable component at %C is not "
1888 /* Add the initializer. Note that it is fine if initializer is
1889 NULL here, because we sometimes also need to check if a
1890 declaration *must* have an initialization expression. */
1891 if (gfc_current_state () != COMP_DERIVED)
1892 t = add_init_expr_to_sym (name, &initializer, &var_locus);
1895 if (current_ts.type == BT_DERIVED
1896 && !current_attr.pointer && !initializer)
1897 initializer = gfc_default_initializer (¤t_ts);
1898 t = build_struct (name, cl, &initializer, &as);
1901 m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
1904 /* Free stuff up and return. */
1905 gfc_free_expr (initializer);
1906 gfc_free_array_spec (as);
1912 /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification.
1913 This assumes that the byte size is equal to the kind number for
1914 non-COMPLEX types, and equal to twice the kind number for COMPLEX. */
1917 gfc_match_old_kind_spec (gfc_typespec *ts)
1922 if (gfc_match_char ('*') != MATCH_YES)
1925 m = gfc_match_small_literal_int (&ts->kind, NULL);
1929 original_kind = ts->kind;
1931 /* Massage the kind numbers for complex types. */
1932 if (ts->type == BT_COMPLEX)
1936 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1937 gfc_basic_typename (ts->type), original_kind);
1943 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
1945 gfc_error ("Old-style type declaration %s*%d not supported at %C",
1946 gfc_basic_typename (ts->type), original_kind);
1950 if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C",
1951 gfc_basic_typename (ts->type), original_kind) == FAILURE)
1958 /* Match a kind specification. Since kinds are generally optional, we
1959 usually return MATCH_NO if something goes wrong. If a "kind="
1960 string is found, then we know we have an error. */
1963 gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only)
1975 where = loc = gfc_current_locus;
1980 if (gfc_match_char ('(') == MATCH_NO)
1983 /* Also gobbles optional text. */
1984 if (gfc_match (" kind = ") == MATCH_YES)
1987 loc = gfc_current_locus;
1990 n = gfc_match_init_expr (&e);
1994 if (gfc_matching_function)
1996 /* The function kind expression might include use associated or
1997 imported parameters and try again after the specification
1999 if (gfc_match_char (')') != MATCH_YES)
2001 gfc_error ("Missing right parenthesis at %C");
2007 gfc_undo_symbols ();
2012 /* ....or else, the match is real. */
2014 gfc_error ("Expected initialization expression at %C");
2022 gfc_error ("Expected scalar initialization expression at %C");
2027 msg = gfc_extract_int (e, &ts->kind);
2036 /* Before throwing away the expression, let's see if we had a
2037 C interoperable kind (and store the fact). */
2038 if (e->ts.is_c_interop == 1)
2040 /* Mark this as c interoperable if being declared with one
2041 of the named constants from iso_c_binding. */
2042 ts->is_c_interop = e->ts.is_iso_c;
2043 ts->f90_type = e->ts.f90_type;
2049 /* Ignore errors to this point, if we've gotten here. This means
2050 we ignore the m=MATCH_ERROR from above. */
2051 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
2053 gfc_error ("Kind %d not supported for type %s at %C", ts->kind,
2054 gfc_basic_typename (ts->type));
2055 gfc_current_locus = where;
2059 /* Warn if, e.g., c_int is used for a REAL variable, but not
2060 if, e.g., c_double is used for COMPLEX as the standard
2061 explicitly says that the kind type parameter for complex and real
2062 variable is the same, i.e. c_float == c_float_complex. */
2063 if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type
2064 && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX)
2065 || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL)))
2066 gfc_warning_now ("C kind type parameter is for type %s but type at %L "
2067 "is %s", gfc_basic_typename (ts->f90_type), &where,
2068 gfc_basic_typename (ts->type));
2070 gfc_gobble_whitespace ();
2071 if ((c = gfc_next_ascii_char ()) != ')'
2072 && (ts->type != BT_CHARACTER || c != ','))
2074 if (ts->type == BT_CHARACTER)
2075 gfc_error ("Missing right parenthesis or comma at %C");
2077 gfc_error ("Missing right parenthesis at %C");
2081 /* All tests passed. */
2084 if(m == MATCH_ERROR)
2085 gfc_current_locus = where;
2087 /* Return what we know from the test(s). */
2092 gfc_current_locus = where;
2098 match_char_kind (int * kind, int * is_iso_c)
2107 where = gfc_current_locus;
2109 n = gfc_match_init_expr (&e);
2111 if (n != MATCH_YES && gfc_matching_function)
2113 /* The expression might include use-associated or imported
2114 parameters and try again after the specification
2117 gfc_undo_symbols ();
2122 gfc_error ("Expected initialization expression at %C");
2128 gfc_error ("Expected scalar initialization expression at %C");
2133 msg = gfc_extract_int (e, kind);
2134 *is_iso_c = e->ts.is_iso_c;
2144 /* Ignore errors to this point, if we've gotten here. This means
2145 we ignore the m=MATCH_ERROR from above. */
2146 if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0)
2148 gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind);
2152 /* All tests passed. */
2155 if (m == MATCH_ERROR)
2156 gfc_current_locus = where;
2158 /* Return what we know from the test(s). */
2163 gfc_current_locus = where;
2168 /* Match the various kind/length specifications in a CHARACTER
2169 declaration. We don't return MATCH_NO. */
2172 gfc_match_char_spec (gfc_typespec *ts)
2174 int kind, seen_length, is_iso_c;
2184 /* Try the old-style specification first. */
2185 old_char_selector = 0;
2187 m = match_char_length (&len);
2191 old_char_selector = 1;
2196 m = gfc_match_char ('(');
2199 m = MATCH_YES; /* Character without length is a single char. */
2203 /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */
2204 if (gfc_match (" kind =") == MATCH_YES)
2206 m = match_char_kind (&kind, &is_iso_c);
2208 if (m == MATCH_ERROR)
2213 if (gfc_match (" , len =") == MATCH_NO)
2216 m = char_len_param_value (&len);
2219 if (m == MATCH_ERROR)
2226 /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */
2227 if (gfc_match (" len =") == MATCH_YES)
2229 m = char_len_param_value (&len);
2232 if (m == MATCH_ERROR)
2236 if (gfc_match_char (')') == MATCH_YES)
2239 if (gfc_match (" , kind =") != MATCH_YES)
2242 if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR)
2248 /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */
2249 m = char_len_param_value (&len);
2252 if (m == MATCH_ERROR)
2256 m = gfc_match_char (')');
2260 if (gfc_match_char (',') != MATCH_YES)
2263 gfc_match (" kind ="); /* Gobble optional text. */
2265 m = match_char_kind (&kind, &is_iso_c);
2266 if (m == MATCH_ERROR)
2272 /* Require a right-paren at this point. */
2273 m = gfc_match_char (')');
2278 gfc_error ("Syntax error in CHARACTER declaration at %C");
2280 gfc_free_expr (len);
2284 /* Deal with character functions after USE and IMPORT statements. */
2285 if (gfc_matching_function)
2287 gfc_free_expr (len);
2288 gfc_undo_symbols ();
2294 gfc_free_expr (len);
2298 /* Do some final massaging of the length values. */
2299 cl = gfc_new_charlen (gfc_current_ns, NULL);
2301 if (seen_length == 0)
2302 cl->length = gfc_get_int_expr (gfc_default_integer_kind, NULL, 1);
2307 ts->kind = kind == 0 ? gfc_default_character_kind : kind;
2309 /* We have to know if it was a c interoperable kind so we can
2310 do accurate type checking of bind(c) procs, etc. */
2312 /* Mark this as c interoperable if being declared with one
2313 of the named constants from iso_c_binding. */
2314 ts->is_c_interop = is_iso_c;
2315 else if (len != NULL)
2316 /* Here, we might have parsed something such as: character(c_char)
2317 In this case, the parsing code above grabs the c_char when
2318 looking for the length (line 1690, roughly). it's the last
2319 testcase for parsing the kind params of a character variable.
2320 However, it's not actually the length. this seems like it
2322 To see if the user used a C interop kind, test the expr
2323 of the so called length, and see if it's C interoperable. */
2324 ts->is_c_interop = len->ts.is_iso_c;
2330 /* Matches a declaration-type-spec (F03:R502). If successful, sets the ts
2331 structure to the matched specification. This is necessary for FUNCTION and
2332 IMPLICIT statements.
2334 If implicit_flag is nonzero, then we don't check for the optional
2335 kind specification. Not doing so is needed for matching an IMPLICIT
2336 statement correctly. */
2339 gfc_match_decl_type_spec (gfc_typespec *ts, int implicit_flag)
2341 char name[GFC_MAX_SYMBOL_LEN + 1];
2345 bool seen_deferred_kind;
2347 /* A belt and braces check that the typespec is correctly being treated
2348 as a deferred characteristic association. */
2349 seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION)
2350 && (gfc_current_block ()->result->ts.kind == -1)
2351 && (ts->kind == -1);
2353 if (seen_deferred_kind)
2356 /* Clear the current binding label, in case one is given. */
2357 curr_binding_label[0] = '\0';
2359 if (gfc_match (" byte") == MATCH_YES)
2361 if (gfc_notify_std (GFC_STD_GNU, "Extension: BYTE type at %C")
2365 if (gfc_validate_kind (BT_INTEGER, 1, true) < 0)
2367 gfc_error ("BYTE type used at %C "
2368 "is not available on the target machine");
2372 ts->type = BT_INTEGER;
2377 if (gfc_match (" integer") == MATCH_YES)
2379 ts->type = BT_INTEGER;
2380 ts->kind = gfc_default_integer_kind;
2384 if (gfc_match (" character") == MATCH_YES)
2386 ts->type = BT_CHARACTER;
2387 if (implicit_flag == 0)
2388 return gfc_match_char_spec (ts);
2393 if (gfc_match (" real") == MATCH_YES)
2396 ts->kind = gfc_default_real_kind;
2400 if (gfc_match (" double precision") == MATCH_YES)
2403 ts->kind = gfc_default_double_kind;
2407 if (gfc_match (" complex") == MATCH_YES)
2409 ts->type = BT_COMPLEX;
2410 ts->kind = gfc_default_complex_kind;
2414 if (gfc_match (" double complex") == MATCH_YES)
2416 if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not "
2417 "conform to the Fortran 95 standard") == FAILURE)
2420 ts->type = BT_COMPLEX;
2421 ts->kind = gfc_default_double_kind;
2425 if (gfc_match (" logical") == MATCH_YES)
2427 ts->type = BT_LOGICAL;
2428 ts->kind = gfc_default_logical_kind;
2432 m = gfc_match (" type ( %n )", name);
2434 ts->type = BT_DERIVED;
2437 m = gfc_match (" class ( %n )", name);
2440 ts->type = BT_CLASS;
2442 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: CLASS statement at %C")
2447 /* Defer association of the derived type until the end of the
2448 specification block. However, if the derived type can be
2449 found, add it to the typespec. */
2450 if (gfc_matching_function)
2452 ts->u.derived = NULL;
2453 if (gfc_current_state () != COMP_INTERFACE
2454 && !gfc_find_symbol (name, NULL, 1, &sym) && sym)
2455 ts->u.derived = sym;
2459 /* Search for the name but allow the components to be defined later. If
2460 type = -1, this typespec has been seen in a function declaration but
2461 the type could not be accessed at that point. */
2463 if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym))
2465 gfc_error ("Type name '%s' at %C is ambiguous", name);
2468 else if (ts->kind == -1)
2470 int iface = gfc_state_stack->previous->state != COMP_INTERFACE
2471 || gfc_current_ns->has_import_set;
2472 if (gfc_find_symbol (name, NULL, iface, &sym))
2474 gfc_error ("Type name '%s' at %C is ambiguous", name);
2483 if (sym->attr.flavor != FL_DERIVED
2484 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
2487 gfc_set_sym_referenced (sym);
2488 ts->u.derived = sym;
2493 /* For all types except double, derived and character, look for an
2494 optional kind specifier. MATCH_NO is actually OK at this point. */
2495 if (implicit_flag == 1)
2498 if (gfc_current_form == FORM_FREE)
2500 c = gfc_peek_ascii_char ();
2501 if (!gfc_is_whitespace (c) && c != '*' && c != '('
2502 && c != ':' && c != ',')
2506 m = gfc_match_kind_spec (ts, false);
2507 if (m == MATCH_NO && ts->type != BT_CHARACTER)
2508 m = gfc_match_old_kind_spec (ts);
2510 /* Defer association of the KIND expression of function results
2511 until after USE and IMPORT statements. */
2512 if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ())
2513 || gfc_matching_function)
2517 m = MATCH_YES; /* No kind specifier found. */
2523 /* Match an IMPLICIT NONE statement. Actually, this statement is
2524 already matched in parse.c, or we would not end up here in the
2525 first place. So the only thing we need to check, is if there is
2526 trailing garbage. If not, the match is successful. */
2529 gfc_match_implicit_none (void)
2531 return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO;
2535 /* Match the letter range(s) of an IMPLICIT statement. */
2538 match_implicit_range (void)
2544 cur_loc = gfc_current_locus;
2546 gfc_gobble_whitespace ();
2547 c = gfc_next_ascii_char ();
2550 gfc_error ("Missing character range in IMPLICIT at %C");
2557 gfc_gobble_whitespace ();
2558 c1 = gfc_next_ascii_char ();
2562 gfc_gobble_whitespace ();
2563 c = gfc_next_ascii_char ();
2568 inner = 0; /* Fall through. */
2575 gfc_gobble_whitespace ();
2576 c2 = gfc_next_ascii_char ();
2580 gfc_gobble_whitespace ();
2581 c = gfc_next_ascii_char ();
2583 if ((c != ',') && (c != ')'))
2596 gfc_error ("Letters must be in alphabetic order in "
2597 "IMPLICIT statement at %C");
2601 /* See if we can add the newly matched range to the pending
2602 implicits from this IMPLICIT statement. We do not check for
2603 conflicts with whatever earlier IMPLICIT statements may have
2604 set. This is done when we've successfully finished matching
2606 if (gfc_add_new_implicit_range (c1, c2) != SUCCESS)
2613 gfc_syntax_error (ST_IMPLICIT);
2615 gfc_current_locus = cur_loc;
2620 /* Match an IMPLICIT statement, storing the types for
2621 gfc_set_implicit() if the statement is accepted by the parser.
2622 There is a strange looking, but legal syntactic construction
2623 possible. It looks like:
2625 IMPLICIT INTEGER (a-b) (c-d)
2627 This is legal if "a-b" is a constant expression that happens to
2628 equal one of the legal kinds for integers. The real problem
2629 happens with an implicit specification that looks like:
2631 IMPLICIT INTEGER (a-b)
2633 In this case, a typespec matcher that is "greedy" (as most of the
2634 matchers are) gobbles the character range as a kindspec, leaving
2635 nothing left. We therefore have to go a bit more slowly in the
2636 matching process by inhibiting the kindspec checking during
2637 typespec matching and checking for a kind later. */
2640 gfc_match_implicit (void)
2649 /* We don't allow empty implicit statements. */
2650 if (gfc_match_eos () == MATCH_YES)
2652 gfc_error ("Empty IMPLICIT statement at %C");
2658 /* First cleanup. */
2659 gfc_clear_new_implicit ();
2661 /* A basic type is mandatory here. */
2662 m = gfc_match_decl_type_spec (&ts, 1);
2663 if (m == MATCH_ERROR)
2668 cur_loc = gfc_current_locus;
2669 m = match_implicit_range ();
2673 /* We may have <TYPE> (<RANGE>). */
2674 gfc_gobble_whitespace ();
2675 c = gfc_next_ascii_char ();
2676 if ((c == '\n') || (c == ','))
2678 /* Check for CHARACTER with no length parameter. */
2679 if (ts.type == BT_CHARACTER && !ts.u.cl)
2681 ts.kind = gfc_default_character_kind;
2682 ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
2683 ts.u.cl->length = gfc_get_int_expr (gfc_default_integer_kind,
2687 /* Record the Successful match. */
2688 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2693 gfc_current_locus = cur_loc;
2696 /* Discard the (incorrectly) matched range. */
2697 gfc_clear_new_implicit ();
2699 /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */
2700 if (ts.type == BT_CHARACTER)
2701 m = gfc_match_char_spec (&ts);
2704 m = gfc_match_kind_spec (&ts, false);
2707 m = gfc_match_old_kind_spec (&ts);
2708 if (m == MATCH_ERROR)
2714 if (m == MATCH_ERROR)
2717 m = match_implicit_range ();
2718 if (m == MATCH_ERROR)
2723 gfc_gobble_whitespace ();
2724 c = gfc_next_ascii_char ();
2725 if ((c != '\n') && (c != ','))
2728 if (gfc_merge_new_implicit (&ts) != SUCCESS)
2736 gfc_syntax_error (ST_IMPLICIT);
2744 gfc_match_import (void)
2746 char name[GFC_MAX_SYMBOL_LEN + 1];
2751 if (gfc_current_ns->proc_name == NULL
2752 || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY)
2754 gfc_error ("IMPORT statement at %C only permitted in "
2755 "an INTERFACE body");
2759 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C")
2763 if (gfc_match_eos () == MATCH_YES)
2765 /* All host variables should be imported. */
2766 gfc_current_ns->has_import_set = 1;
2770 if (gfc_match (" ::") == MATCH_YES)
2772 if (gfc_match_eos () == MATCH_YES)
2774 gfc_error ("Expecting list of named entities at %C");
2781 m = gfc_match (" %n", name);
2785 if (gfc_current_ns->parent != NULL
2786 && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym))
2788 gfc_error ("Type name '%s' at %C is ambiguous", name);
2791 else if (gfc_current_ns->proc_name->ns->parent != NULL
2792 && gfc_find_symbol (name,
2793 gfc_current_ns->proc_name->ns->parent,
2796 gfc_error ("Type name '%s' at %C is ambiguous", name);
2802 gfc_error ("Cannot IMPORT '%s' from host scoping unit "
2803 "at %C - does not exist.", name);
2807 if (gfc_find_symtree (gfc_current_ns->sym_root,name))
2809 gfc_warning ("'%s' is already IMPORTed from host scoping unit "
2814 st = gfc_new_symtree (&gfc_current_ns->sym_root, sym->name);
2817 sym->attr.imported = 1;
2829 if (gfc_match_eos () == MATCH_YES)
2831 if (gfc_match_char (',') != MATCH_YES)
2838 gfc_error ("Syntax error in IMPORT statement at %C");
2843 /* A minimal implementation of gfc_match without whitespace, escape
2844 characters or variable arguments. Returns true if the next
2845 characters match the TARGET template exactly. */
2848 match_string_p (const char *target)
2852 for (p = target; *p; p++)
2853 if ((char) gfc_next_ascii_char () != *p)
2858 /* Matches an attribute specification including array specs. If
2859 successful, leaves the variables current_attr and current_as
2860 holding the specification. Also sets the colon_seen variable for
2861 later use by matchers associated with initializations.
2863 This subroutine is a little tricky in the sense that we don't know
2864 if we really have an attr-spec until we hit the double colon.
2865 Until that time, we can only return MATCH_NO. This forces us to
2866 check for duplicate specification at this level. */
2869 match_attr_spec (void)
2871 /* Modifiers that can exist in a type statement. */
2873 { GFC_DECL_BEGIN = 0,
2874 DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL,
2875 DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL,
2876 DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE,
2877 DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE,
2878 DECL_IS_BIND_C, DECL_CODIMENSION, DECL_ASYNCHRONOUS, DECL_NONE,
2879 GFC_DECL_END /* Sentinel */
2883 /* GFC_DECL_END is the sentinel, index starts at 0. */
2884 #define NUM_DECL GFC_DECL_END
2886 locus start, seen_at[NUM_DECL];
2893 gfc_clear_attr (¤t_attr);
2894 start = gfc_current_locus;
2899 /* See if we get all of the keywords up to the final double colon. */
2900 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
2908 gfc_gobble_whitespace ();
2910 ch = gfc_next_ascii_char ();
2913 /* This is the successful exit condition for the loop. */
2914 if (gfc_next_ascii_char () == ':')
2919 gfc_gobble_whitespace ();
2920 switch (gfc_peek_ascii_char ())
2923 gfc_next_ascii_char ();
2924 switch (gfc_next_ascii_char ())
2927 if (match_string_p ("locatable"))
2929 /* Matched "allocatable". */
2930 d = DECL_ALLOCATABLE;
2935 if (match_string_p ("ynchronous"))
2937 /* Matched "asynchronous". */
2938 d = DECL_ASYNCHRONOUS;
2944 /* Try and match the bind(c). */
2945 m = gfc_match_bind_c (NULL, true);
2948 else if (m == MATCH_ERROR)
2953 if (match_string_p ("codimension"))
2954 d = DECL_CODIMENSION;
2958 if (match_string_p ("dimension"))
2963 if (match_string_p ("external"))
2968 if (match_string_p ("int"))
2970 ch = gfc_next_ascii_char ();
2973 if (match_string_p ("nt"))
2975 /* Matched "intent". */
2976 /* TODO: Call match_intent_spec from here. */
2977 if (gfc_match (" ( in out )") == MATCH_YES)
2979 else if (gfc_match (" ( in )") == MATCH_YES)
2981 else if (gfc_match (" ( out )") == MATCH_YES)
2987 if (match_string_p ("insic"))
2989 /* Matched "intrinsic". */
2997 if (match_string_p ("optional"))
3002 gfc_next_ascii_char ();
3003 switch (gfc_next_ascii_char ())
3006 if (match_string_p ("rameter"))
3008 /* Matched "parameter". */
3014 if (match_string_p ("inter"))
3016 /* Matched "pointer". */
3022 ch = gfc_next_ascii_char ();
3025 if (match_string_p ("vate"))
3027 /* Matched "private". */
3033 if (match_string_p ("tected"))
3035 /* Matched "protected". */
3042 if (match_string_p ("blic"))
3044 /* Matched "public". */
3052 if (match_string_p ("save"))
3057 if (match_string_p ("target"))
3062 gfc_next_ascii_char ();
3063 ch = gfc_next_ascii_char ();
3066 if (match_string_p ("lue"))
3068 /* Matched "value". */
3074 if (match_string_p ("latile"))
3076 /* Matched "volatile". */
3084 /* No double colon and no recognizable decl_type, so assume that
3085 we've been looking at something else the whole time. */
3092 /* Check to make sure any parens are paired up correctly. */
3093 if (gfc_match_parens () == MATCH_ERROR)
3100 seen_at[d] = gfc_current_locus;
3102 if (d == DECL_DIMENSION || d == DECL_CODIMENSION)
3104 gfc_array_spec *as = NULL;
3106 m = gfc_match_array_spec (&as, d == DECL_DIMENSION,
3107 d == DECL_CODIMENSION);
3109 if (current_as == NULL)
3111 else if (m == MATCH_YES)
3113 merge_array_spec (as, current_as, false);
3119 if (d == DECL_CODIMENSION)
3120 gfc_error ("Missing codimension specification at %C");
3122 gfc_error ("Missing dimension specification at %C");
3126 if (m == MATCH_ERROR)
3131 /* Since we've seen a double colon, we have to be looking at an
3132 attr-spec. This means that we can now issue errors. */
3133 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3138 case DECL_ALLOCATABLE:
3139 attr = "ALLOCATABLE";
3141 case DECL_ASYNCHRONOUS:
3142 attr = "ASYNCHRONOUS";
3144 case DECL_CODIMENSION:
3145 attr = "CODIMENSION";
3147 case DECL_DIMENSION:
3154 attr = "INTENT (IN)";
3157 attr = "INTENT (OUT)";
3160 attr = "INTENT (IN OUT)";
3162 case DECL_INTRINSIC:
3168 case DECL_PARAMETER:
3174 case DECL_PROTECTED:
3189 case DECL_IS_BIND_C:
3199 attr = NULL; /* This shouldn't happen. */
3202 gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]);
3207 /* Now that we've dealt with duplicate attributes, add the attributes
3208 to the current attribute. */
3209 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3214 if (gfc_current_state () == COMP_DERIVED
3215 && d != DECL_DIMENSION && d != DECL_CODIMENSION
3216 && d != DECL_POINTER && d != DECL_PRIVATE
3217 && d != DECL_PUBLIC && d != DECL_NONE)
3219 if (d == DECL_ALLOCATABLE)
3221 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE "
3222 "attribute at %C in a TYPE definition")
3231 gfc_error ("Attribute at %L is not allowed in a TYPE definition",
3238 if ((d == DECL_PRIVATE || d == DECL_PUBLIC)
3239 && gfc_current_state () != COMP_MODULE)
3241 if (d == DECL_PRIVATE)
3245 if (gfc_current_state () == COMP_DERIVED
3246 && gfc_state_stack->previous
3247 && gfc_state_stack->previous->state == COMP_MODULE)
3249 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s "
3250 "at %L in a TYPE definition", attr,
3260 gfc_error ("%s attribute at %L is not allowed outside of the "
3261 "specification part of a module", attr, &seen_at[d]);
3269 case DECL_ALLOCATABLE:
3270 t = gfc_add_allocatable (¤t_attr, &seen_at[d]);
3273 case DECL_ASYNCHRONOUS:
3274 if (gfc_notify_std (GFC_STD_F2003,
3275 "Fortran 2003: ASYNCHRONOUS attribute at %C")
3279 t = gfc_add_asynchronous (¤t_attr, NULL, &seen_at[d]);
3282 case DECL_CODIMENSION:
3283 t = gfc_add_codimension (¤t_attr, NULL, &seen_at[d]);
3286 case DECL_DIMENSION:
3287 t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]);
3291 t = gfc_add_external (¤t_attr, &seen_at[d]);
3295 t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]);
3299 t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]);
3303 t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]);
3306 case DECL_INTRINSIC:
3307 t = gfc_add_intrinsic (¤t_attr, &seen_at[d]);
3311 t = gfc_add_optional (¤t_attr, &seen_at[d]);
3314 case DECL_PARAMETER:
3315 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]);
3319 t = gfc_add_pointer (¤t_attr, &seen_at[d]);
3322 case DECL_PROTECTED:
3323 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
3325 gfc_error ("PROTECTED at %C only allowed in specification "
3326 "part of a module");
3331 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED "
3336 t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]);
3340 t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL,
3345 t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL,
3350 t = gfc_add_save (¤t_attr, NULL, &seen_at[d]);
3354 t = gfc_add_target (¤t_attr, &seen_at[d]);
3357 case DECL_IS_BIND_C:
3358 t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0);
3362 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute "
3367 t = gfc_add_value (¤t_attr, NULL, &seen_at[d]);
3371 if (gfc_notify_std (GFC_STD_F2003,
3372 "Fortran 2003: VOLATILE attribute at %C")
3376 t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]);
3380 gfc_internal_error ("match_attr_spec(): Bad attribute");
3394 gfc_current_locus = start;
3395 gfc_free_array_spec (current_as);
3401 /* Set the binding label, dest_label, either with the binding label
3402 stored in the given gfc_typespec, ts, or if none was provided, it
3403 will be the symbol name in all lower case, as required by the draft
3404 (J3/04-007, section 15.4.1). If a binding label was given and
3405 there is more than one argument (num_idents), it is an error. */
3408 set_binding_label (char *dest_label, const char *sym_name, int num_idents)
3410 if (num_idents > 1 && has_name_equals)
3412 gfc_error ("Multiple identifiers provided with "
3413 "single NAME= specifier at %C");
3417 if (curr_binding_label[0] != '\0')
3419 /* Binding label given; store in temp holder til have sym. */
3420 strcpy (dest_label, curr_binding_label);
3424 /* No binding label given, and the NAME= specifier did not exist,
3425 which means there was no NAME="". */
3426 if (sym_name != NULL && has_name_equals == 0)
3427 strcpy (dest_label, sym_name);
3434 /* Set the status of the given common block as being BIND(C) or not,
3435 depending on the given parameter, is_bind_c. */
3438 set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c)
3440 com_block->is_bind_c = is_bind_c;
3445 /* Verify that the given gfc_typespec is for a C interoperable type. */
3448 verify_c_interop (gfc_typespec *ts)
3450 if (ts->type == BT_DERIVED && ts->u.derived != NULL)
3451 return (ts->u.derived->ts.is_c_interop ? SUCCESS : FAILURE);
3452 else if (ts->is_c_interop != 1)
3459 /* Verify that the variables of a given common block, which has been
3460 defined with the attribute specifier bind(c), to be of a C
3461 interoperable type. Errors will be reported here, if
3465 verify_com_block_vars_c_interop (gfc_common_head *com_block)
3467 gfc_symbol *curr_sym = NULL;
3468 gfc_try retval = SUCCESS;
3470 curr_sym = com_block->head;
3472 /* Make sure we have at least one symbol. */
3473 if (curr_sym == NULL)
3476 /* Here we know we have a symbol, so we'll execute this loop
3480 /* The second to last param, 1, says this is in a common block. */
3481 retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block);
3482 curr_sym = curr_sym->common_next;
3483 } while (curr_sym != NULL);
3489 /* Verify that a given BIND(C) symbol is C interoperable. If it is not,
3490 an appropriate error message is reported. */
3493 verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts,
3494 int is_in_common, gfc_common_head *com_block)
3496 bool bind_c_function = false;
3497 gfc_try retval = SUCCESS;
3499 if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c)
3500 bind_c_function = true;
3502 if (tmp_sym->attr.function && tmp_sym->result != NULL)
3504 tmp_sym = tmp_sym->result;
3505 /* Make sure it wasn't an implicitly typed result. */
3506 if (tmp_sym->attr.implicit_type)
3508 gfc_warning ("Implicitly declared BIND(C) function '%s' at "
3509 "%L may not be C interoperable", tmp_sym->name,
3510 &tmp_sym->declared_at);
3511 tmp_sym->ts.f90_type = tmp_sym->ts.type;
3512 /* Mark it as C interoperable to prevent duplicate warnings. */
3513 tmp_sym->ts.is_c_interop = 1;
3514 tmp_sym->attr.is_c_interop = 1;
3518 /* Here, we know we have the bind(c) attribute, so if we have
3519 enough type info, then verify that it's a C interop kind.
3520 The info could be in the symbol already, or possibly still in
3521 the given ts (current_ts), so look in both. */
3522 if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN)
3524 if (verify_c_interop (&(tmp_sym->ts)) != SUCCESS)
3526 /* See if we're dealing with a sym in a common block or not. */
3527 if (is_in_common == 1)
3529 gfc_warning ("Variable '%s' in common block '%s' at %L "
3530 "may not be a C interoperable "
3531 "kind though common block '%s' is BIND(C)",
3532 tmp_sym->name, com_block->name,
3533 &(tmp_sym->declared_at), com_block->name);
3537 if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED)
3538 gfc_error ("Type declaration '%s' at %L is not C "
3539 "interoperable but it is BIND(C)",
3540 tmp_sym->name, &(tmp_sym->declared_at));
3542 gfc_warning ("Variable '%s' at %L "
3543 "may not be a C interoperable "
3544 "kind but it is bind(c)",
3545 tmp_sym->name, &(tmp_sym->declared_at));
3549 /* Variables declared w/in a common block can't be bind(c)
3550 since there's no way for C to see these variables, so there's
3551 semantically no reason for the attribute. */
3552 if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1)
3554 gfc_error ("Variable '%s' in common block '%s' at "
3555 "%L cannot be declared with BIND(C) "
3556 "since it is not a global",
3557 tmp_sym->name, com_block->name,
3558 &(tmp_sym->declared_at));
3562 /* Scalar variables that are bind(c) can not have the pointer
3563 or allocatable attributes. */
3564 if (tmp_sym->attr.is_bind_c == 1)
3566 if (tmp_sym->attr.pointer == 1)
3568 gfc_error ("Variable '%s' at %L cannot have both the "
3569 "POINTER and BIND(C) attributes",
3570 tmp_sym->name, &(tmp_sym->declared_at));
3574 if (tmp_sym->attr.allocatable == 1)
3576 gfc_error ("Variable '%s' at %L cannot have both the "
3577 "ALLOCATABLE and BIND(C) attributes",
3578 tmp_sym->name, &(tmp_sym->declared_at));
3584 /* If it is a BIND(C) function, make sure the return value is a
3585 scalar value. The previous tests in this function made sure
3586 the type is interoperable. */
3587 if (bind_c_function && tmp_sym->as != NULL)
3588 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3589 "be an array", tmp_sym->name, &(tmp_sym->declared_at));
3591 /* BIND(C) functions can not return a character string. */
3592 if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER)
3593 if (tmp_sym->ts.u.cl == NULL || tmp_sym->ts.u.cl->length == NULL
3594 || tmp_sym->ts.u.cl->length->expr_type != EXPR_CONSTANT
3595 || mpz_cmp_si (tmp_sym->ts.u.cl->length->value.integer, 1) != 0)
3596 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3597 "be a character string", tmp_sym->name,
3598 &(tmp_sym->declared_at));
3601 /* See if the symbol has been marked as private. If it has, make sure
3602 there is no binding label and warn the user if there is one. */
3603 if (tmp_sym->attr.access == ACCESS_PRIVATE
3604 && tmp_sym->binding_label[0] != '\0')
3605 /* Use gfc_warning_now because we won't say that the symbol fails
3606 just because of this. */
3607 gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been "
3608 "given the binding label '%s'", tmp_sym->name,
3609 &(tmp_sym->declared_at), tmp_sym->binding_label);
3615 /* Set the appropriate fields for a symbol that's been declared as
3616 BIND(C) (the is_bind_c flag and the binding label), and verify that
3617 the type is C interoperable. Errors are reported by the functions
3618 used to set/test these fields. */
3621 set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents)
3623 gfc_try retval = SUCCESS;
3625 /* TODO: Do we need to make sure the vars aren't marked private? */
3627 /* Set the is_bind_c bit in symbol_attribute. */
3628 gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0);
3630 if (set_binding_label (tmp_sym->binding_label, tmp_sym->name,
3631 num_idents) != SUCCESS)
3638 /* Set the fields marking the given common block as BIND(C), including
3639 a binding label, and report any errors encountered. */
3642 set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents)
3644 gfc_try retval = SUCCESS;
3646 /* destLabel, common name, typespec (which may have binding label). */
3647 if (set_binding_label (com_block->binding_label, com_block->name, num_idents)
3651 /* Set the given common block (com_block) to being bind(c) (1). */
3652 set_com_block_bind_c (com_block, 1);
3658 /* Retrieve the list of one or more identifiers that the given bind(c)
3659 attribute applies to. */
3662 get_bind_c_idents (void)
3664 char name[GFC_MAX_SYMBOL_LEN + 1];
3666 gfc_symbol *tmp_sym = NULL;
3668 gfc_common_head *com_block = NULL;
3670 if (gfc_match_name (name) == MATCH_YES)
3672 found_id = MATCH_YES;
3673 gfc_get_ha_symbol (name, &tmp_sym);
3675 else if (match_common_name (name) == MATCH_YES)
3677 found_id = MATCH_YES;
3678 com_block = gfc_get_common (name, 0);
3682 gfc_error ("Need either entity or common block name for "
3683 "attribute specification statement at %C");
3687 /* Save the current identifier and look for more. */
3690 /* Increment the number of identifiers found for this spec stmt. */
3693 /* Make sure we have a sym or com block, and verify that it can
3694 be bind(c). Set the appropriate field(s) and look for more
3696 if (tmp_sym != NULL || com_block != NULL)
3698 if (tmp_sym != NULL)
3700 if (set_verify_bind_c_sym (tmp_sym, num_idents)
3706 if (set_verify_bind_c_com_block(com_block, num_idents)
3711 /* Look to see if we have another identifier. */
3713 if (gfc_match_eos () == MATCH_YES)
3714 found_id = MATCH_NO;
3715 else if (gfc_match_char (',') != MATCH_YES)
3716 found_id = MATCH_NO;
3717 else if (gfc_match_name (name) == MATCH_YES)
3719 found_id = MATCH_YES;
3720 gfc_get_ha_symbol (name, &tmp_sym);
3722 else if (match_common_name (name) == MATCH_YES)
3724 found_id = MATCH_YES;
3725 com_block = gfc_get_common (name, 0);
3729 gfc_error ("Missing entity or common block name for "
3730 "attribute specification statement at %C");
3736 gfc_internal_error ("Missing symbol");
3738 } while (found_id == MATCH_YES);
3740 /* if we get here we were successful */
3745 /* Try and match a BIND(C) attribute specification statement. */
3748 gfc_match_bind_c_stmt (void)
3750 match found_match = MATCH_NO;
3755 /* This may not be necessary. */
3757 /* Clear the temporary binding label holder. */
3758 curr_binding_label[0] = '\0';
3760 /* Look for the bind(c). */
3761 found_match = gfc_match_bind_c (NULL, true);
3763 if (found_match == MATCH_YES)
3765 /* Look for the :: now, but it is not required. */
3768 /* Get the identifier(s) that needs to be updated. This may need to
3769 change to hand the flag(s) for the attr specified so all identifiers
3770 found can have all appropriate parts updated (assuming that the same
3771 spec stmt can have multiple attrs, such as both bind(c) and
3773 if (get_bind_c_idents () != SUCCESS)
3774 /* Error message should have printed already. */
3782 /* Match a data declaration statement. */
3785 gfc_match_data_decl (void)
3791 num_idents_on_line = 0;
3793 m = gfc_match_decl_type_spec (¤t_ts, 0);
3797 if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS)
3798 && gfc_current_state () != COMP_DERIVED)
3800 sym = gfc_use_derived (current_ts.u.derived);
3808 current_ts.u.derived = sym;
3811 m = match_attr_spec ();
3812 if (m == MATCH_ERROR)
3818 if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS)
3819 && current_ts.u.derived->components == NULL
3820 && !current_ts.u.derived->attr.zero_comp)
3823 if (current_attr.pointer && gfc_current_state () == COMP_DERIVED)
3826 gfc_find_symbol (current_ts.u.derived->name,
3827 current_ts.u.derived->ns->parent, 1, &sym);
3829 /* Any symbol that we find had better be a type definition
3830 which has its components defined. */
3831 if (sym != NULL && sym->attr.flavor == FL_DERIVED
3832 && (current_ts.u.derived->components != NULL
3833 || current_ts.u.derived->attr.zero_comp))
3836 /* Now we have an error, which we signal, and then fix up
3837 because the knock-on is plain and simple confusing. */
3838 gfc_error_now ("Derived type at %C has not been previously defined "
3839 "and so cannot appear in a derived type definition");
3840 current_attr.pointer = 1;
3845 /* If we have an old-style character declaration, and no new-style
3846 attribute specifications, then there a comma is optional between
3847 the type specification and the variable list. */
3848 if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector)
3849 gfc_match_char (',');
3851 /* Give the types/attributes to symbols that follow. Give the element
3852 a number so that repeat character length expressions can be copied. */
3856 num_idents_on_line++;
3857 m = variable_decl (elem++);
3858 if (m == MATCH_ERROR)
3863 if (gfc_match_eos () == MATCH_YES)
3865 if (gfc_match_char (',') != MATCH_YES)
3869 if (gfc_error_flag_test () == 0)
3870 gfc_error ("Syntax error in data declaration at %C");
3873 gfc_free_data_all (gfc_current_ns);
3876 gfc_free_array_spec (current_as);
3882 /* Match a prefix associated with a function or subroutine
3883 declaration. If the typespec pointer is nonnull, then a typespec
3884 can be matched. Note that if nothing matches, MATCH_YES is
3885 returned (the null string was matched). */
3888 gfc_match_prefix (gfc_typespec *ts)
3892 gfc_clear_attr (¤t_attr);
3895 gcc_assert (!gfc_matching_prefix);
3896 gfc_matching_prefix = true;
3899 if (!seen_type && ts != NULL
3900 && gfc_match_decl_type_spec (ts, 0) == MATCH_YES
3901 && gfc_match_space () == MATCH_YES)
3908 if (gfc_match ("elemental% ") == MATCH_YES)
3910 if (gfc_add_elemental (¤t_attr, NULL) == FAILURE)
3916 if (gfc_match ("pure% ") == MATCH_YES)
3918 if (gfc_add_pure (¤t_attr, NULL) == FAILURE)
3924 if (gfc_match ("recursive% ") == MATCH_YES)
3926 if (gfc_add_recursive (¤t_attr, NULL) == FAILURE)
3932 /* At this point, the next item is not a prefix. */
3933 gcc_assert (gfc_matching_prefix);
3934 gfc_matching_prefix = false;
3938 gcc_assert (gfc_matching_prefix);
3939 gfc_matching_prefix = false;
3944 /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */
3947 copy_prefix (symbol_attribute *dest, locus *where)
3949 if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE)
3952 if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE)
3955 if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE)
3962 /* Match a formal argument list. */
3965 gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag)
3967 gfc_formal_arglist *head, *tail, *p, *q;
3968 char name[GFC_MAX_SYMBOL_LEN + 1];
3974 if (gfc_match_char ('(') != MATCH_YES)
3981 if (gfc_match_char (')') == MATCH_YES)
3986 if (gfc_match_char ('*') == MATCH_YES)
3990 m = gfc_match_name (name);
3994 if (gfc_get_symbol (name, NULL, &sym))
3998 p = gfc_get_formal_arglist ();
4010 /* We don't add the VARIABLE flavor because the name could be a
4011 dummy procedure. We don't apply these attributes to formal
4012 arguments of statement functions. */
4013 if (sym != NULL && !st_flag
4014 && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE
4015 || gfc_missing_attr (&sym->attr, NULL) == FAILURE))
4021 /* The name of a program unit can be in a different namespace,
4022 so check for it explicitly. After the statement is accepted,
4023 the name is checked for especially in gfc_get_symbol(). */
4024 if (gfc_new_block != NULL && sym != NULL
4025 && strcmp (sym->name, gfc_new_block->name) == 0)
4027 gfc_error ("Name '%s' at %C is the name of the procedure",
4033 if (gfc_match_char (')') == MATCH_YES)
4036 m = gfc_match_char (',');
4039 gfc_error ("Unexpected junk in formal argument list at %C");
4045 /* Check for duplicate symbols in the formal argument list. */
4048 for (p = head; p->next; p = p->next)
4053 for (q = p->next; q; q = q->next)
4054 if (p->sym == q->sym)
4056 gfc_error ("Duplicate symbol '%s' in formal argument list "
4057 "at %C", p->sym->name);
4065 if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL)
4075 gfc_free_formal_arglist (head);
4080 /* Match a RESULT specification following a function declaration or
4081 ENTRY statement. Also matches the end-of-statement. */
4084 match_result (gfc_symbol *function, gfc_symbol **result)
4086 char name[GFC_MAX_SYMBOL_LEN + 1];
4090 if (gfc_match (" result (") != MATCH_YES)
4093 m = gfc_match_name (name);
4097 /* Get the right paren, and that's it because there could be the
4098 bind(c) attribute after the result clause. */
4099 if (gfc_match_char(')') != MATCH_YES)
4101 /* TODO: should report the missing right paren here. */
4105 if (strcmp (function->name, name) == 0)
4107 gfc_error ("RESULT variable at %C must be different than function name");
4111 if (gfc_get_symbol (name, NULL, &r))
4114 if (gfc_add_result (&r->attr, r->name, NULL) == FAILURE)
4123 /* Match a function suffix, which could be a combination of a result
4124 clause and BIND(C), either one, or neither. The draft does not
4125 require them to come in a specific order. */
4128 gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result)
4130 match is_bind_c; /* Found bind(c). */
4131 match is_result; /* Found result clause. */
4132 match found_match; /* Status of whether we've found a good match. */
4133 char peek_char; /* Character we're going to peek at. */
4134 bool allow_binding_name;
4136 /* Initialize to having found nothing. */
4137 found_match = MATCH_NO;
4138 is_bind_c = MATCH_NO;
4139 is_result = MATCH_NO;
4141 /* Get the next char to narrow between result and bind(c). */
4142 gfc_gobble_whitespace ();
4143 peek_char = gfc_peek_ascii_char ();
4145 /* C binding names are not allowed for internal procedures. */
4146 if (gfc_current_state () == COMP_CONTAINS
4147 && sym->ns->proc_name->attr.flavor != FL_MODULE)
4148 allow_binding_name = false;
4150 allow_binding_name = true;
4155 /* Look for result clause. */
4156 is_result = match_result (sym, result);
4157 if (is_result == MATCH_YES)
4159 /* Now see if there is a bind(c) after it. */
4160 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4161 /* We've found the result clause and possibly bind(c). */
4162 found_match = MATCH_YES;
4165 /* This should only be MATCH_ERROR. */
4166 found_match = is_result;
4169 /* Look for bind(c) first. */
4170 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4171 if (is_bind_c == MATCH_YES)
4173 /* Now see if a result clause followed it. */
4174 is_result = match_result (sym, result);
4175 found_match = MATCH_YES;
4179 /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */
4180 found_match = MATCH_ERROR;
4184 gfc_error ("Unexpected junk after function declaration at %C");
4185 found_match = MATCH_ERROR;
4189 if (is_bind_c == MATCH_YES)
4191 /* Fortran 2008 draft allows BIND(C) for internal procedures. */
4192 if (gfc_current_state () == COMP_CONTAINS
4193 && sym->ns->proc_name->attr.flavor != FL_MODULE
4194 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
4195 "at %L may not be specified for an internal "
4196 "procedure", &gfc_current_locus)
4200 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1)
4209 /* Procedure pointer return value without RESULT statement:
4210 Add "hidden" result variable named "ppr@". */
4213 add_hidden_procptr_result (gfc_symbol *sym)
4217 if (gfc_notification_std (GFC_STD_F2003) == ERROR)
4220 /* First usage case: PROCEDURE and EXTERNAL statements. */
4221 case1 = gfc_current_state () == COMP_FUNCTION && gfc_current_block ()
4222 && strcmp (gfc_current_block ()->name, sym->name) == 0
4223 && sym->attr.external;
4224 /* Second usage case: INTERFACE statements. */
4225 case2 = gfc_current_state () == COMP_INTERFACE && gfc_state_stack->previous
4226 && gfc_state_stack->previous->state == COMP_FUNCTION
4227 && strcmp (gfc_state_stack->previous->sym->name, sym->name) == 0;
4233 gfc_get_sym_tree ("ppr@", gfc_current_ns, &stree, false);
4237 gfc_get_sym_tree ("ppr@", gfc_current_ns->parent, &stree, false);
4238 st2 = gfc_new_symtree (&gfc_current_ns->sym_root, "ppr@");
4239 st2->n.sym = stree->n.sym;
4241 sym->result = stree->n.sym;
4243 sym->result->attr.proc_pointer = sym->attr.proc_pointer;
4244 sym->result->attr.pointer = sym->attr.pointer;
4245 sym->result->attr.external = sym->attr.external;
4246 sym->result->attr.referenced = sym->attr.referenced;
4247 sym->result->ts = sym->ts;
4248 sym->attr.proc_pointer = 0;
4249 sym->attr.pointer = 0;
4250 sym->attr.external = 0;
4251 if (sym->result->attr.external && sym->result->attr.pointer)
4253 sym->result->attr.pointer = 0;
4254 sym->result->attr.proc_pointer = 1;
4257 return gfc_add_result (&sym->result->attr, sym->result->name, NULL);
4259 /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */
4260 else if (sym->attr.function && !sym->attr.external && sym->attr.pointer
4261 && sym->result && sym->result != sym && sym->result->attr.external
4262 && sym == gfc_current_ns->proc_name
4263 && sym == sym->result->ns->proc_name
4264 && strcmp ("ppr@", sym->result->name) == 0)
4266 sym->result->attr.proc_pointer = 1;
4267 sym->attr.pointer = 0;
4275 /* Match the interface for a PROCEDURE declaration,
4276 including brackets (R1212). */
4279 match_procedure_interface (gfc_symbol **proc_if)
4283 locus old_loc, entry_loc;
4284 gfc_namespace *old_ns = gfc_current_ns;
4285 char name[GFC_MAX_SYMBOL_LEN + 1];
4287 old_loc = entry_loc = gfc_current_locus;
4288 gfc_clear_ts (¤t_ts);
4290 if (gfc_match (" (") != MATCH_YES)
4292 gfc_current_locus = entry_loc;
4296 /* Get the type spec. for the procedure interface. */
4297 old_loc = gfc_current_locus;
4298 m = gfc_match_decl_type_spec (¤t_ts, 0);
4299 gfc_gobble_whitespace ();
4300 if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')'))
4303 if (m == MATCH_ERROR)
4306 /* Procedure interface is itself a procedure. */
4307 gfc_current_locus = old_loc;
4308 m = gfc_match_name (name);
4310 /* First look to see if it is already accessible in the current
4311 namespace because it is use associated or contained. */
4313 if (gfc_find_sym_tree (name, NULL, 0, &st))
4316 /* If it is still not found, then try the parent namespace, if it
4317 exists and create the symbol there if it is still not found. */
4318 if (gfc_current_ns->parent)
4319 gfc_current_ns = gfc_current_ns->parent;
4320 if (st == NULL && gfc_get_ha_sym_tree (name, &st))
4323 gfc_current_ns = old_ns;
4324 *proc_if = st->n.sym;
4326 /* Various interface checks. */
4330 /* Resolve interface if possible. That way, attr.procedure is only set
4331 if it is declared by a later procedure-declaration-stmt, which is
4332 invalid per C1212. */
4333 while ((*proc_if)->ts.interface)
4334 *proc_if = (*proc_if)->ts.interface;
4336 if ((*proc_if)->generic)
4338 gfc_error ("Interface '%s' at %C may not be generic",
4342 if ((*proc_if)->attr.proc == PROC_ST_FUNCTION)
4344 gfc_error ("Interface '%s' at %C may not be a statement function",
4348 /* Handle intrinsic procedures. */
4349 if (!((*proc_if)->attr.external || (*proc_if)->attr.use_assoc
4350 || (*proc_if)->attr.if_source == IFSRC_IFBODY)
4351 && (gfc_is_intrinsic ((*proc_if), 0, gfc_current_locus)
4352 || gfc_is_intrinsic ((*proc_if), 1, gfc_current_locus)))
4353 (*proc_if)->attr.intrinsic = 1;
4354 if ((*proc_if)->attr.intrinsic
4355 && !gfc_intrinsic_actual_ok ((*proc_if)->name, 0))
4357 gfc_error ("Intrinsic procedure '%s' not allowed "
4358 "in PROCEDURE statement at %C", (*proc_if)->name);
4364 if (gfc_match (" )") != MATCH_YES)
4366 gfc_current_locus = entry_loc;
4374 /* Match a PROCEDURE declaration (R1211). */
4377 match_procedure_decl (void)
4380 gfc_symbol *sym, *proc_if = NULL;
4382 gfc_expr *initializer = NULL;
4384 /* Parse interface (with brackets). */
4385 m = match_procedure_interface (&proc_if);
4389 /* Parse attributes (with colons). */
4390 m = match_attr_spec();
4391 if (m == MATCH_ERROR)
4394 /* Get procedure symbols. */
4397 m = gfc_match_symbol (&sym, 0);
4400 else if (m == MATCH_ERROR)
4403 /* Add current_attr to the symbol attributes. */
4404 if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE)
4407 if (sym->attr.is_bind_c)
4409 /* Check for C1218. */
4410 if (!proc_if || !proc_if->attr.is_bind_c)
4412 gfc_error ("BIND(C) attribute at %C requires "
4413 "an interface with BIND(C)");
4416 /* Check for C1217. */
4417 if (has_name_equals && sym->attr.pointer)
4419 gfc_error ("BIND(C) procedure with NAME may not have "
4420 "POINTER attribute at %C");
4423 if (has_name_equals && sym->attr.dummy)
4425 gfc_error ("Dummy procedure at %C may not have "
4426 "BIND(C) attribute with NAME");
4429 /* Set binding label for BIND(C). */
4430 if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS)
4434 if (gfc_add_external (&sym->attr, NULL) == FAILURE)
4437 if (add_hidden_procptr_result (sym) == SUCCESS)
4440 if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE)
4443 /* Set interface. */
4444 if (proc_if != NULL)
4446 if (sym->ts.type != BT_UNKNOWN)
4448 gfc_error ("Procedure '%s' at %L already has basic type of %s",
4449 sym->name, &gfc_current_locus,
4450 gfc_basic_typename (sym->ts.type));
4453 sym->ts.interface = proc_if;
4454 sym->attr.untyped = 1;
4455 sym->attr.if_source = IFSRC_IFBODY;
4457 else if (current_ts.type != BT_UNKNOWN)
4459 if (gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4461 sym->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4462 sym->ts.interface->ts = current_ts;
4463 sym->ts.interface->attr.function = 1;
4464 sym->attr.function = sym->ts.interface->attr.function;
4465 sym->attr.if_source = IFSRC_UNKNOWN;
4468 if (gfc_match (" =>") == MATCH_YES)
4470 if (!current_attr.pointer)
4472 gfc_error ("Initialization at %C isn't for a pointer variable");
4477 m = gfc_match_null (&initializer);
4480 gfc_error ("Pointer initialization requires a NULL() at %C");
4484 if (gfc_pure (NULL))
4486 gfc_error ("Initialization of pointer at %C is not allowed in "
4487 "a PURE procedure");
4494 if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus)
4500 gfc_set_sym_referenced (sym);
4502 if (gfc_match_eos () == MATCH_YES)
4504 if (gfc_match_char (',') != MATCH_YES)
4509 gfc_error ("Syntax error in PROCEDURE statement at %C");
4513 /* Free stuff up and return. */
4514 gfc_free_expr (initializer);
4520 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc);
4523 /* Match a procedure pointer component declaration (R445). */
4526 match_ppc_decl (void)
4529 gfc_symbol *proc_if = NULL;
4533 gfc_expr *initializer = NULL;
4534 gfc_typebound_proc* tb;
4535 char name[GFC_MAX_SYMBOL_LEN + 1];
4537 /* Parse interface (with brackets). */
4538 m = match_procedure_interface (&proc_if);
4542 /* Parse attributes. */
4543 tb = XCNEW (gfc_typebound_proc);
4544 tb->where = gfc_current_locus;
4545 m = match_binding_attributes (tb, false, true);
4546 if (m == MATCH_ERROR)
4549 gfc_clear_attr (¤t_attr);
4550 current_attr.procedure = 1;
4551 current_attr.proc_pointer = 1;
4552 current_attr.access = tb->access;
4553 current_attr.flavor = FL_PROCEDURE;
4555 /* Match the colons (required). */
4556 if (gfc_match (" ::") != MATCH_YES)
4558 gfc_error ("Expected '::' after binding-attributes at %C");
4562 /* Check for C450. */
4563 if (!tb->nopass && proc_if == NULL)
4565 gfc_error("NOPASS or explicit interface required at %C");
4569 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Procedure pointer "
4570 "component at %C") == FAILURE)
4573 /* Match PPC names. */
4577 m = gfc_match_name (name);
4580 else if (m == MATCH_ERROR)
4583 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
4586 /* Add current_attr to the symbol attributes. */
4587 if (gfc_copy_attr (&c->attr, ¤t_attr, NULL) == FAILURE)
4590 if (gfc_add_external (&c->attr, NULL) == FAILURE)
4593 if (gfc_add_proc (&c->attr, name, NULL) == FAILURE)
4598 /* Set interface. */
4599 if (proc_if != NULL)
4601 c->ts.interface = proc_if;
4602 c->attr.untyped = 1;
4603 c->attr.if_source = IFSRC_IFBODY;
4605 else if (ts.type != BT_UNKNOWN)
4608 c->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4609 c->ts.interface->ts = ts;
4610 c->ts.interface->attr.function = 1;
4611 c->attr.function = c->ts.interface->attr.function;
4612 c->attr.if_source = IFSRC_UNKNOWN;
4615 if (gfc_match (" =>") == MATCH_YES)
4617 m = gfc_match_null (&initializer);
4620 gfc_error ("Pointer initialization requires a NULL() at %C");
4623 if (gfc_pure (NULL))
4625 gfc_error ("Initialization of pointer at %C is not allowed in "
4626 "a PURE procedure");
4631 gfc_free_expr (initializer);
4634 c->initializer = initializer;
4637 if (gfc_match_eos () == MATCH_YES)
4639 if (gfc_match_char (',') != MATCH_YES)
4644 gfc_error ("Syntax error in procedure pointer component at %C");
4649 /* Match a PROCEDURE declaration inside an interface (R1206). */
4652 match_procedure_in_interface (void)
4656 char name[GFC_MAX_SYMBOL_LEN + 1];
4658 if (current_interface.type == INTERFACE_NAMELESS
4659 || current_interface.type == INTERFACE_ABSTRACT)
4661 gfc_error ("PROCEDURE at %C must be in a generic interface");
4667 m = gfc_match_name (name);
4670 else if (m == MATCH_ERROR)
4672 if (gfc_get_symbol (name, gfc_current_ns->parent, &sym))
4675 if (gfc_add_interface (sym) == FAILURE)
4678 if (gfc_match_eos () == MATCH_YES)
4680 if (gfc_match_char (',') != MATCH_YES)
4687 gfc_error ("Syntax error in PROCEDURE statement at %C");
4692 /* General matcher for PROCEDURE declarations. */
4694 static match match_procedure_in_type (void);
4697 gfc_match_procedure (void)
4701 switch (gfc_current_state ())
4706 case COMP_SUBROUTINE:
4708 m = match_procedure_decl ();
4710 case COMP_INTERFACE:
4711 m = match_procedure_in_interface ();
4714 m = match_ppc_decl ();
4716 case COMP_DERIVED_CONTAINS:
4717 m = match_procedure_in_type ();
4726 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C")
4734 /* Warn if a matched procedure has the same name as an intrinsic; this is
4735 simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current
4736 parser-state-stack to find out whether we're in a module. */
4739 warn_intrinsic_shadow (const gfc_symbol* sym, bool func)
4743 in_module = (gfc_state_stack->previous
4744 && gfc_state_stack->previous->state == COMP_MODULE);
4746 gfc_warn_intrinsic_shadow (sym, in_module, func);
4750 /* Match a function declaration. */
4753 gfc_match_function_decl (void)
4755 char name[GFC_MAX_SYMBOL_LEN + 1];
4756 gfc_symbol *sym, *result;
4760 match found_match; /* Status returned by match func. */
4762 if (gfc_current_state () != COMP_NONE
4763 && gfc_current_state () != COMP_INTERFACE
4764 && gfc_current_state () != COMP_CONTAINS)
4767 gfc_clear_ts (¤t_ts);
4769 old_loc = gfc_current_locus;
4771 m = gfc_match_prefix (¤t_ts);
4774 gfc_current_locus = old_loc;
4778 if (gfc_match ("function% %n", name) != MATCH_YES)
4780 gfc_current_locus = old_loc;
4783 if (get_proc_name (name, &sym, false))
4786 if (add_hidden_procptr_result (sym) == SUCCESS)
4789 gfc_new_block = sym;
4791 m = gfc_match_formal_arglist (sym, 0, 0);
4794 gfc_error ("Expected formal argument list in function "
4795 "definition at %C");
4799 else if (m == MATCH_ERROR)
4804 /* According to the draft, the bind(c) and result clause can
4805 come in either order after the formal_arg_list (i.e., either
4806 can be first, both can exist together or by themselves or neither
4807 one). Therefore, the match_result can't match the end of the
4808 string, and check for the bind(c) or result clause in either order. */
4809 found_match = gfc_match_eos ();
4811 /* Make sure that it isn't already declared as BIND(C). If it is, it
4812 must have been marked BIND(C) with a BIND(C) attribute and that is
4813 not allowed for procedures. */
4814 if (sym->attr.is_bind_c == 1)
4816 sym->attr.is_bind_c = 0;
4817 if (sym->old_symbol != NULL)
4818 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4819 "variables or common blocks",
4820 &(sym->old_symbol->declared_at));
4822 gfc_error_now ("BIND(C) attribute at %L can only be used for "
4823 "variables or common blocks", &gfc_current_locus);
4826 if (found_match != MATCH_YES)
4828 /* If we haven't found the end-of-statement, look for a suffix. */
4829 suffix_match = gfc_match_suffix (sym, &result);
4830 if (suffix_match == MATCH_YES)
4831 /* Need to get the eos now. */
4832 found_match = gfc_match_eos ();
4834 found_match = suffix_match;
4837 if(found_match != MATCH_YES)
4841 /* Make changes to the symbol. */
4844 if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)
4847 if (gfc_missing_attr (&sym->attr, NULL) == FAILURE
4848 || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
4851 /* Delay matching the function characteristics until after the
4852 specification block by signalling kind=-1. */
4853 sym->declared_at = old_loc;
4854 if (current_ts.type != BT_UNKNOWN)
4855 current_ts.kind = -1;
4857 current_ts.kind = 0;
4861 if (current_ts.type != BT_UNKNOWN
4862 && gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4868 if (current_ts.type != BT_UNKNOWN
4869 && gfc_add_type (result, ¤t_ts, &gfc_current_locus)
4872 sym->result = result;
4875 /* Warn if this procedure has the same name as an intrinsic. */
4876 warn_intrinsic_shadow (sym, true);
4882 gfc_current_locus = old_loc;
4887 /* This is mostly a copy of parse.c(add_global_procedure) but modified to
4888 pass the name of the entry, rather than the gfc_current_block name, and
4889 to return false upon finding an existing global entry. */
4892 add_global_entry (const char *name, int sub)
4895 enum gfc_symbol_type type;
4897 s = gfc_get_gsymbol(name);
4898 type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION;
4901 || (s->type != GSYM_UNKNOWN
4902 && s->type != type))
4903 gfc_global_used(s, NULL);
4907 s->where = gfc_current_locus;
4909 s->ns = gfc_current_ns;
4916 /* Match an ENTRY statement. */
4919 gfc_match_entry (void)
4924 char name[GFC_MAX_SYMBOL_LEN + 1];
4925 gfc_compile_state state;
4929 bool module_procedure;
4933 m = gfc_match_name (name);
4937 state = gfc_current_state ();
4938 if (state != COMP_SUBROUTINE && state != COMP_FUNCTION)
4943 gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM");
4946 gfc_error ("ENTRY statement at %C cannot appear within a MODULE");
4948 case COMP_BLOCK_DATA:
4949 gfc_error ("ENTRY statement at %C cannot appear within "
4952 case COMP_INTERFACE:
4953 gfc_error ("ENTRY statement at %C cannot appear within "
4957 gfc_error ("ENTRY statement at %C cannot appear within "
4958 "a DERIVED TYPE block");
4961 gfc_error ("ENTRY statement at %C cannot appear within "
4962 "an IF-THEN block");
4965 gfc_error ("ENTRY statement at %C cannot appear within "
4969 gfc_error ("ENTRY statement at %C cannot appear within "
4973 gfc_error ("ENTRY statement at %C cannot appear within "
4977 gfc_error ("ENTRY statement at %C cannot appear within "
4981 gfc_error ("ENTRY statement at %C cannot appear within "
4982 "a contained subprogram");
4985 gfc_internal_error ("gfc_match_entry(): Bad state");
4990 module_procedure = gfc_current_ns->parent != NULL
4991 && gfc_current_ns->parent->proc_name
4992 && gfc_current_ns->parent->proc_name->attr.flavor
4995 if (gfc_current_ns->parent != NULL
4996 && gfc_current_ns->parent->proc_name
4997 && !module_procedure)
4999 gfc_error("ENTRY statement at %C cannot appear in a "
5000 "contained procedure");
5004 /* Module function entries need special care in get_proc_name
5005 because previous references within the function will have
5006 created symbols attached to the current namespace. */
5007 if (get_proc_name (name, &entry,
5008 gfc_current_ns->parent != NULL
5009 && module_procedure))
5012 proc = gfc_current_block ();
5014 /* Make sure that it isn't already declared as BIND(C). If it is, it
5015 must have been marked BIND(C) with a BIND(C) attribute and that is
5016 not allowed for procedures. */
5017 if (entry->attr.is_bind_c == 1)
5019 entry->attr.is_bind_c = 0;
5020 if (entry->old_symbol != NULL)
5021 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5022 "variables or common blocks",
5023 &(entry->old_symbol->declared_at));
5025 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5026 "variables or common blocks", &gfc_current_locus);
5029 /* Check what next non-whitespace character is so we can tell if there
5030 is the required parens if we have a BIND(C). */
5031 gfc_gobble_whitespace ();
5032 peek_char = gfc_peek_ascii_char ();
5034 if (state == COMP_SUBROUTINE)
5036 /* An entry in a subroutine. */
5037 if (!gfc_current_ns->parent && !add_global_entry (name, 1))
5040 m = gfc_match_formal_arglist (entry, 0, 1);
5044 /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can
5045 never be an internal procedure. */
5046 is_bind_c = gfc_match_bind_c (entry, true);
5047 if (is_bind_c == MATCH_ERROR)
5049 if (is_bind_c == MATCH_YES)
5051 if (peek_char != '(')
5053 gfc_error ("Missing required parentheses before BIND(C) at %C");
5056 if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1)
5061 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
5062 || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE)
5067 /* An entry in a function.
5068 We need to take special care because writing
5073 ENTRY f() RESULT (r)
5075 ENTRY f RESULT (r). */
5076 if (!gfc_current_ns->parent && !add_global_entry (name, 0))
5079 old_loc = gfc_current_locus;
5080 if (gfc_match_eos () == MATCH_YES)
5082 gfc_current_locus = old_loc;
5083 /* Match the empty argument list, and add the interface to
5085 m = gfc_match_formal_arglist (entry, 0, 1);
5088 m = gfc_match_formal_arglist (entry, 0, 0);
5095 if (gfc_match_eos () == MATCH_YES)
5097 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
5098 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
5101 entry->result = entry;
5105 m = gfc_match_suffix (entry, &result);
5107 gfc_syntax_error (ST_ENTRY);
5113 if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE
5114 || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE
5115 || gfc_add_function (&entry->attr, result->name, NULL)
5118 entry->result = result;
5122 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
5123 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
5125 entry->result = entry;
5130 if (gfc_match_eos () != MATCH_YES)
5132 gfc_syntax_error (ST_ENTRY);
5136 entry->attr.recursive = proc->attr.recursive;
5137 entry->attr.elemental = proc->attr.elemental;
5138 entry->attr.pure = proc->attr.pure;
5140 el = gfc_get_entry_list ();
5142 el->next = gfc_current_ns->entries;
5143 gfc_current_ns->entries = el;
5145 el->id = el->next->id + 1;
5149 new_st.op = EXEC_ENTRY;
5150 new_st.ext.entry = el;
5156 /* Match a subroutine statement, including optional prefixes. */
5159 gfc_match_subroutine (void)
5161 char name[GFC_MAX_SYMBOL_LEN + 1];
5166 bool allow_binding_name;
5168 if (gfc_current_state () != COMP_NONE
5169 && gfc_current_state () != COMP_INTERFACE
5170 && gfc_current_state () != COMP_CONTAINS)
5173 m = gfc_match_prefix (NULL);
5177 m = gfc_match ("subroutine% %n", name);
5181 if (get_proc_name (name, &sym, false))
5184 /* Set declared_at as it might point to, e.g., a PUBLIC statement, if
5185 the symbol existed before. */
5186 sym->declared_at = gfc_current_locus;
5188 if (add_hidden_procptr_result (sym) == SUCCESS)
5191 gfc_new_block = sym;
5193 /* Check what next non-whitespace character is so we can tell if there
5194 is the required parens if we have a BIND(C). */
5195 gfc_gobble_whitespace ();
5196 peek_char = gfc_peek_ascii_char ();
5198 if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE)
5201 if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES)
5204 /* Make sure that it isn't already declared as BIND(C). If it is, it
5205 must have been marked BIND(C) with a BIND(C) attribute and that is
5206 not allowed for procedures. */
5207 if (sym->attr.is_bind_c == 1)
5209 sym->attr.is_bind_c = 0;
5210 if (sym->old_symbol != NULL)
5211 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5212 "variables or common blocks",
5213 &(sym->old_symbol->declared_at));
5215 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5216 "variables or common blocks", &gfc_current_locus);
5219 /* C binding names are not allowed for internal procedures. */
5220 if (gfc_current_state () == COMP_CONTAINS
5221 && sym->ns->proc_name->attr.flavor != FL_MODULE)
5222 allow_binding_name = false;
5224 allow_binding_name = true;
5226 /* Here, we are just checking if it has the bind(c) attribute, and if
5227 so, then we need to make sure it's all correct. If it doesn't,
5228 we still need to continue matching the rest of the subroutine line. */
5229 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
5230 if (is_bind_c == MATCH_ERROR)
5232 /* There was an attempt at the bind(c), but it was wrong. An
5233 error message should have been printed w/in the gfc_match_bind_c
5234 so here we'll just return the MATCH_ERROR. */
5238 if (is_bind_c == MATCH_YES)
5240 /* The following is allowed in the Fortran 2008 draft. */
5241 if (gfc_current_state () == COMP_CONTAINS
5242 && sym->ns->proc_name->attr.flavor != FL_MODULE
5243 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
5244 "at %L may not be specified for an internal "
5245 "procedure", &gfc_current_locus)
5249 if (peek_char != '(')
5251 gfc_error ("Missing required parentheses before BIND(C) at %C");
5254 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1)
5259 if (gfc_match_eos () != MATCH_YES)
5261 gfc_syntax_error (ST_SUBROUTINE);
5265 if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
5268 /* Warn if it has the same name as an intrinsic. */
5269 warn_intrinsic_shadow (sym, false);
5275 /* Match a BIND(C) specifier, with the optional 'name=' specifier if
5276 given, and set the binding label in either the given symbol (if not
5277 NULL), or in the current_ts. The symbol may be NULL because we may
5278 encounter the BIND(C) before the declaration itself. Return
5279 MATCH_NO if what we're looking at isn't a BIND(C) specifier,
5280 MATCH_ERROR if it is a BIND(C) clause but an error was encountered,
5281 or MATCH_YES if the specifier was correct and the binding label and
5282 bind(c) fields were set correctly for the given symbol or the
5283 current_ts. If allow_binding_name is false, no binding name may be
5287 gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name)
5289 /* binding label, if exists */
5290 char binding_label[GFC_MAX_SYMBOL_LEN + 1];
5294 /* Initialize the flag that specifies whether we encountered a NAME=
5295 specifier or not. */
5296 has_name_equals = 0;
5298 /* Init the first char to nil so we can catch if we don't have
5299 the label (name attr) or the symbol name yet. */
5300 binding_label[0] = '\0';
5302 /* This much we have to be able to match, in this order, if
5303 there is a bind(c) label. */
5304 if (gfc_match (" bind ( c ") != MATCH_YES)
5307 /* Now see if there is a binding label, or if we've reached the
5308 end of the bind(c) attribute without one. */
5309 if (gfc_match_char (',') == MATCH_YES)
5311 if (gfc_match (" name = ") != MATCH_YES)
5313 gfc_error ("Syntax error in NAME= specifier for binding label "
5315 /* should give an error message here */
5319 has_name_equals = 1;
5321 /* Get the opening quote. */
5322 double_quote = MATCH_YES;
5323 single_quote = MATCH_YES;
5324 double_quote = gfc_match_char ('"');
5325 if (double_quote != MATCH_YES)
5326 single_quote = gfc_match_char ('\'');
5327 if (double_quote != MATCH_YES && single_quote != MATCH_YES)
5329 gfc_error ("Syntax error in NAME= specifier for binding label "
5334 /* Grab the binding label, using functions that will not lower
5335 case the names automatically. */
5336 if (gfc_match_name_C (binding_label) != MATCH_YES)
5339 /* Get the closing quotation. */
5340 if (double_quote == MATCH_YES)
5342 if (gfc_match_char ('"') != MATCH_YES)
5344 gfc_error ("Missing closing quote '\"' for binding label at %C");
5345 /* User started string with '"' so looked to match it. */
5351 if (gfc_match_char ('\'') != MATCH_YES)
5353 gfc_error ("Missing closing quote '\'' for binding label at %C");
5354 /* User started string with "'" char. */
5360 /* Get the required right paren. */
5361 if (gfc_match_char (')') != MATCH_YES)
5363 gfc_error ("Missing closing paren for binding label at %C");
5367 if (has_name_equals && !allow_binding_name)
5369 gfc_error ("No binding name is allowed in BIND(C) at %C");
5373 if (has_name_equals && sym != NULL && sym->attr.dummy)
5375 gfc_error ("For dummy procedure %s, no binding name is "
5376 "allowed in BIND(C) at %C", sym->name);
5381 /* Save the binding label to the symbol. If sym is null, we're
5382 probably matching the typespec attributes of a declaration and
5383 haven't gotten the name yet, and therefore, no symbol yet. */
5384 if (binding_label[0] != '\0')
5388 strcpy (sym->binding_label, binding_label);
5391 strcpy (curr_binding_label, binding_label);
5393 else if (allow_binding_name)
5395 /* No binding label, but if symbol isn't null, we
5396 can set the label for it here.
5397 If name="" or allow_binding_name is false, no C binding name is
5399 if (sym != NULL && sym->name != NULL && has_name_equals == 0)
5400 strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1);
5403 if (has_name_equals && gfc_current_state () == COMP_INTERFACE
5404 && current_interface.type == INTERFACE_ABSTRACT)
5406 gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C");
5414 /* Return nonzero if we're currently compiling a contained procedure. */
5417 contained_procedure (void)
5419 gfc_state_data *s = gfc_state_stack;
5421 if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION)
5422 && s->previous != NULL && s->previous->state == COMP_CONTAINS)
5428 /* Set the kind of each enumerator. The kind is selected such that it is
5429 interoperable with the corresponding C enumeration type, making
5430 sure that -fshort-enums is honored. */
5435 enumerator_history *current_history = NULL;
5439 if (max_enum == NULL || enum_history == NULL)
5442 if (!flag_short_enums)
5448 kind = gfc_integer_kinds[i++].kind;
5450 while (kind < gfc_c_int_kind
5451 && gfc_check_integer_range (max_enum->initializer->value.integer,
5454 current_history = enum_history;
5455 while (current_history != NULL)
5457 current_history->sym->ts.kind = kind;
5458 current_history = current_history->next;
5463 /* Match any of the various end-block statements. Returns the type of
5464 END to the caller. The END INTERFACE, END IF, END DO, END SELECT
5465 and END BLOCK statements cannot be replaced by a single END statement. */
5468 gfc_match_end (gfc_statement *st)
5470 char name[GFC_MAX_SYMBOL_LEN + 1];
5471 gfc_compile_state state;
5473 const char *block_name;
5478 old_loc = gfc_current_locus;
5479 if (gfc_match ("end") != MATCH_YES)
5482 state = gfc_current_state ();
5483 block_name = gfc_current_block () == NULL
5484 ? NULL : gfc_current_block ()->name;
5488 case COMP_ASSOCIATE:
5490 if (!strcmp (block_name, "block@"))
5495 case COMP_DERIVED_CONTAINS:
5496 state = gfc_state_stack->previous->state;
5497 block_name = gfc_state_stack->previous->sym == NULL
5498 ? NULL : gfc_state_stack->previous->sym->name;
5509 *st = ST_END_PROGRAM;
5510 target = " program";
5514 case COMP_SUBROUTINE:
5515 *st = ST_END_SUBROUTINE;
5516 target = " subroutine";
5517 eos_ok = !contained_procedure ();
5521 *st = ST_END_FUNCTION;
5522 target = " function";
5523 eos_ok = !contained_procedure ();
5526 case COMP_BLOCK_DATA:
5527 *st = ST_END_BLOCK_DATA;
5528 target = " block data";
5533 *st = ST_END_MODULE;
5538 case COMP_INTERFACE:
5539 *st = ST_END_INTERFACE;
5540 target = " interface";
5545 case COMP_DERIVED_CONTAINS:
5551 case COMP_ASSOCIATE:
5552 *st = ST_END_ASSOCIATE;
5553 target = " associate";
5576 *st = ST_END_CRITICAL;
5577 target = " critical";
5582 case COMP_SELECT_TYPE:
5583 *st = ST_END_SELECT;
5589 *st = ST_END_FORALL;
5604 last_initializer = NULL;
5606 gfc_free_enum_history ();
5610 gfc_error ("Unexpected END statement at %C");
5614 if (gfc_match_eos () == MATCH_YES)
5618 /* We would have required END [something]. */
5619 gfc_error ("%s statement expected at %L",
5620 gfc_ascii_statement (*st), &old_loc);
5627 /* Verify that we've got the sort of end-block that we're expecting. */
5628 if (gfc_match (target) != MATCH_YES)
5630 gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st));
5634 /* If we're at the end, make sure a block name wasn't required. */
5635 if (gfc_match_eos () == MATCH_YES)
5638 if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT
5639 && *st != ST_END_FORALL && *st != ST_END_WHERE && *st != ST_END_BLOCK
5640 && *st != ST_END_ASSOCIATE && *st != ST_END_CRITICAL)
5646 gfc_error ("Expected block name of '%s' in %s statement at %C",
5647 block_name, gfc_ascii_statement (*st));
5652 /* END INTERFACE has a special handler for its several possible endings. */
5653 if (*st == ST_END_INTERFACE)
5654 return gfc_match_end_interface ();
5656 /* We haven't hit the end of statement, so what is left must be an
5658 m = gfc_match_space ();
5660 m = gfc_match_name (name);
5663 gfc_error ("Expected terminating name at %C");
5667 if (block_name == NULL)
5670 if (strcmp (name, block_name) != 0 && strcmp (block_name, "ppr@") != 0)
5672 gfc_error ("Expected label '%s' for %s statement at %C", block_name,
5673 gfc_ascii_statement (*st));
5676 /* Procedure pointer as function result. */
5677 else if (strcmp (block_name, "ppr@") == 0
5678 && strcmp (name, gfc_current_block ()->ns->proc_name->name) != 0)
5680 gfc_error ("Expected label '%s' for %s statement at %C",
5681 gfc_current_block ()->ns->proc_name->name,
5682 gfc_ascii_statement (*st));
5686 if (gfc_match_eos () == MATCH_YES)
5690 gfc_syntax_error (*st);
5693 gfc_current_locus = old_loc;
5699 /***************** Attribute declaration statements ****************/
5701 /* Set the attribute of a single variable. */
5706 char name[GFC_MAX_SYMBOL_LEN + 1];
5714 m = gfc_match_name (name);
5718 if (find_special (name, &sym, false))
5721 var_locus = gfc_current_locus;
5723 /* Deal with possible array specification for certain attributes. */
5724 if (current_attr.dimension
5725 || current_attr.codimension
5726 || current_attr.allocatable
5727 || current_attr.pointer
5728 || current_attr.target)
5730 m = gfc_match_array_spec (&as, !current_attr.codimension,
5731 !current_attr.dimension
5732 && !current_attr.pointer
5733 && !current_attr.target);
5734 if (m == MATCH_ERROR)
5737 if (current_attr.dimension && m == MATCH_NO)
5739 gfc_error ("Missing array specification at %L in DIMENSION "
5740 "statement", &var_locus);
5745 if (current_attr.dimension && sym->value)
5747 gfc_error ("Dimensions specified for %s at %L after its "
5748 "initialisation", sym->name, &var_locus);
5753 if (current_attr.codimension && m == MATCH_NO)
5755 gfc_error ("Missing array specification at %L in CODIMENSION "
5756 "statement", &var_locus);
5761 if ((current_attr.allocatable || current_attr.pointer)
5762 && (m == MATCH_YES) && (as->type != AS_DEFERRED))
5764 gfc_error ("Array specification must be deferred at %L", &var_locus);
5770 /* Update symbol table. DIMENSION attribute is set in
5771 gfc_set_array_spec(). For CLASS variables, this must be applied
5772 to the first component, or '$data' field. */
5773 if (sym->ts.type == BT_CLASS)
5775 if (gfc_copy_attr (&CLASS_DATA (sym)->attr, ¤t_attr,&var_locus)
5781 sym->attr.class_ok = (sym->attr.class_ok || current_attr.allocatable
5782 || current_attr.pointer);
5786 if (current_attr.dimension == 0 && current_attr.codimension == 0
5787 && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE)
5794 if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE)
5800 if (sym->attr.cray_pointee && sym->as != NULL)
5802 /* Fix the array spec. */
5803 m = gfc_mod_pointee_as (sym->as);
5804 if (m == MATCH_ERROR)
5808 if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE)
5814 if ((current_attr.external || current_attr.intrinsic)
5815 && sym->attr.flavor != FL_PROCEDURE
5816 && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE)
5822 add_hidden_procptr_result (sym);
5827 gfc_free_array_spec (as);
5832 /* Generic attribute declaration subroutine. Used for attributes that
5833 just have a list of names. */
5840 /* Gobble the optional double colon, by simply ignoring the result
5850 if (gfc_match_eos () == MATCH_YES)
5856 if (gfc_match_char (',') != MATCH_YES)
5858 gfc_error ("Unexpected character in variable list at %C");
5868 /* This routine matches Cray Pointer declarations of the form:
5869 pointer ( <pointer>, <pointee> )
5871 pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ...
5872 The pointer, if already declared, should be an integer. Otherwise, we
5873 set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may
5874 be either a scalar, or an array declaration. No space is allocated for
5875 the pointee. For the statement
5876 pointer (ipt, ar(10))
5877 any subsequent uses of ar will be translated (in C-notation) as
5878 ar(i) => ((<type> *) ipt)(i)
5879 After gimplification, pointee variable will disappear in the code. */
5882 cray_pointer_decl (void)
5885 gfc_array_spec *as = NULL;
5886 gfc_symbol *cptr; /* Pointer symbol. */
5887 gfc_symbol *cpte; /* Pointee symbol. */
5893 if (gfc_match_char ('(') != MATCH_YES)
5895 gfc_error ("Expected '(' at %C");
5899 /* Match pointer. */
5900 var_locus = gfc_current_locus;
5901 gfc_clear_attr (¤t_attr);
5902 gfc_add_cray_pointer (¤t_attr, &var_locus);
5903 current_ts.type = BT_INTEGER;
5904 current_ts.kind = gfc_index_integer_kind;
5906 m = gfc_match_symbol (&cptr, 0);
5909 gfc_error ("Expected variable name at %C");
5913 if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE)
5916 gfc_set_sym_referenced (cptr);
5918 if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */
5920 cptr->ts.type = BT_INTEGER;
5921 cptr->ts.kind = gfc_index_integer_kind;
5923 else if (cptr->ts.type != BT_INTEGER)
5925 gfc_error ("Cray pointer at %C must be an integer");
5928 else if (cptr->ts.kind < gfc_index_integer_kind)
5929 gfc_warning ("Cray pointer at %C has %d bytes of precision;"
5930 " memory addresses require %d bytes",
5931 cptr->ts.kind, gfc_index_integer_kind);
5933 if (gfc_match_char (',') != MATCH_YES)
5935 gfc_error ("Expected \",\" at %C");
5939 /* Match Pointee. */
5940 var_locus = gfc_current_locus;
5941 gfc_clear_attr (¤t_attr);
5942 gfc_add_cray_pointee (¤t_attr, &var_locus);
5943 current_ts.type = BT_UNKNOWN;
5944 current_ts.kind = 0;
5946 m = gfc_match_symbol (&cpte, 0);
5949 gfc_error ("Expected variable name at %C");
5953 /* Check for an optional array spec. */
5954 m = gfc_match_array_spec (&as, true, false);
5955 if (m == MATCH_ERROR)
5957 gfc_free_array_spec (as);
5960 else if (m == MATCH_NO)
5962 gfc_free_array_spec (as);
5966 if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE)
5969 gfc_set_sym_referenced (cpte);
5971 if (cpte->as == NULL)
5973 if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE)
5974 gfc_internal_error ("Couldn't set Cray pointee array spec.");
5976 else if (as != NULL)
5978 gfc_error ("Duplicate array spec for Cray pointee at %C");
5979 gfc_free_array_spec (as);
5985 if (cpte->as != NULL)
5987 /* Fix array spec. */
5988 m = gfc_mod_pointee_as (cpte->as);
5989 if (m == MATCH_ERROR)
5993 /* Point the Pointee at the Pointer. */
5994 cpte->cp_pointer = cptr;
5996 if (gfc_match_char (')') != MATCH_YES)
5998 gfc_error ("Expected \")\" at %C");
6001 m = gfc_match_char (',');
6003 done = true; /* Stop searching for more declarations. */
6007 if (m == MATCH_ERROR /* Failed when trying to find ',' above. */
6008 || gfc_match_eos () != MATCH_YES)
6010 gfc_error ("Expected \",\" or end of statement at %C");
6018 gfc_match_external (void)
6021 gfc_clear_attr (¤t_attr);
6022 current_attr.external = 1;
6024 return attr_decl ();
6029 gfc_match_intent (void)
6033 /* This is not allowed within a BLOCK construct! */
6034 if (gfc_current_state () == COMP_BLOCK)
6036 gfc_error ("INTENT is not allowed inside of BLOCK at %C");
6040 intent = match_intent_spec ();
6041 if (intent == INTENT_UNKNOWN)
6044 gfc_clear_attr (¤t_attr);
6045 current_attr.intent = intent;
6047 return attr_decl ();
6052 gfc_match_intrinsic (void)
6055 gfc_clear_attr (¤t_attr);
6056 current_attr.intrinsic = 1;
6058 return attr_decl ();
6063 gfc_match_optional (void)
6065 /* This is not allowed within a BLOCK construct! */
6066 if (gfc_current_state () == COMP_BLOCK)
6068 gfc_error ("OPTIONAL is not allowed inside of BLOCK at %C");
6072 gfc_clear_attr (¤t_attr);
6073 current_attr.optional = 1;
6075 return attr_decl ();
6080 gfc_match_pointer (void)
6082 gfc_gobble_whitespace ();
6083 if (gfc_peek_ascii_char () == '(')
6085 if (!gfc_option.flag_cray_pointer)
6087 gfc_error ("Cray pointer declaration at %C requires -fcray-pointer "
6091 return cray_pointer_decl ();
6095 gfc_clear_attr (¤t_attr);
6096 current_attr.pointer = 1;
6098 return attr_decl ();
6104 gfc_match_allocatable (void)
6106 gfc_clear_attr (¤t_attr);
6107 current_attr.allocatable = 1;
6109 return attr_decl ();
6114 gfc_match_codimension (void)
6116 gfc_clear_attr (¤t_attr);
6117 current_attr.codimension = 1;
6119 return attr_decl ();
6124 gfc_match_dimension (void)
6126 gfc_clear_attr (¤t_attr);
6127 current_attr.dimension = 1;
6129 return attr_decl ();
6134 gfc_match_target (void)
6136 gfc_clear_attr (¤t_attr);
6137 current_attr.target = 1;
6139 return attr_decl ();
6143 /* Match the list of entities being specified in a PUBLIC or PRIVATE
6147 access_attr_decl (gfc_statement st)
6149 char name[GFC_MAX_SYMBOL_LEN + 1];
6150 interface_type type;
6153 gfc_intrinsic_op op;
6156 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6161 m = gfc_match_generic_spec (&type, name, &op);
6164 if (m == MATCH_ERROR)
6169 case INTERFACE_NAMELESS:
6170 case INTERFACE_ABSTRACT:
6173 case INTERFACE_GENERIC:
6174 if (gfc_get_symbol (name, NULL, &sym))
6177 if (gfc_add_access (&sym->attr, (st == ST_PUBLIC)
6178 ? ACCESS_PUBLIC : ACCESS_PRIVATE,
6179 sym->name, NULL) == FAILURE)
6184 case INTERFACE_INTRINSIC_OP:
6185 if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN)
6187 gfc_current_ns->operator_access[op] =
6188 (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE;
6192 gfc_error ("Access specification of the %s operator at %C has "
6193 "already been specified", gfc_op2string (op));
6199 case INTERFACE_USER_OP:
6200 uop = gfc_get_uop (name);
6202 if (uop->access == ACCESS_UNKNOWN)
6204 uop->access = (st == ST_PUBLIC)
6205 ? ACCESS_PUBLIC : ACCESS_PRIVATE;
6209 gfc_error ("Access specification of the .%s. operator at %C "
6210 "has already been specified", sym->name);
6217 if (gfc_match_char (',') == MATCH_NO)
6221 if (gfc_match_eos () != MATCH_YES)
6226 gfc_syntax_error (st);
6234 gfc_match_protected (void)
6239 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
6241 gfc_error ("PROTECTED at %C only allowed in specification "
6242 "part of a module");
6247 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C")
6251 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6256 if (gfc_match_eos () == MATCH_YES)
6261 m = gfc_match_symbol (&sym, 0);
6265 if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus)
6278 if (gfc_match_eos () == MATCH_YES)
6280 if (gfc_match_char (',') != MATCH_YES)
6287 gfc_error ("Syntax error in PROTECTED statement at %C");
6292 /* The PRIVATE statement is a bit weird in that it can be an attribute
6293 declaration, but also works as a standalone statement inside of a
6294 type declaration or a module. */
6297 gfc_match_private (gfc_statement *st)
6300 if (gfc_match ("private") != MATCH_YES)
6303 if (gfc_current_state () != COMP_MODULE
6304 && !(gfc_current_state () == COMP_DERIVED
6305 && gfc_state_stack->previous
6306 && gfc_state_stack->previous->state == COMP_MODULE)
6307 && !(gfc_current_state () == COMP_DERIVED_CONTAINS
6308 && gfc_state_stack->previous && gfc_state_stack->previous->previous
6309 && gfc_state_stack->previous->previous->state == COMP_MODULE))
6311 gfc_error ("PRIVATE statement at %C is only allowed in the "
6312 "specification part of a module");
6316 if (gfc_current_state () == COMP_DERIVED)
6318 if (gfc_match_eos () == MATCH_YES)
6324 gfc_syntax_error (ST_PRIVATE);
6328 if (gfc_match_eos () == MATCH_YES)
6335 return access_attr_decl (ST_PRIVATE);
6340 gfc_match_public (gfc_statement *st)
6343 if (gfc_match ("public") != MATCH_YES)
6346 if (gfc_current_state () != COMP_MODULE)
6348 gfc_error ("PUBLIC statement at %C is only allowed in the "
6349 "specification part of a module");
6353 if (gfc_match_eos () == MATCH_YES)
6360 return access_attr_decl (ST_PUBLIC);
6364 /* Workhorse for gfc_match_parameter. */
6374 m = gfc_match_symbol (&sym, 0);
6376 gfc_error ("Expected variable name at %C in PARAMETER statement");
6381 if (gfc_match_char ('=') == MATCH_NO)
6383 gfc_error ("Expected = sign in PARAMETER statement at %C");
6387 m = gfc_match_init_expr (&init);
6389 gfc_error ("Expected expression at %C in PARAMETER statement");
6393 if (sym->ts.type == BT_UNKNOWN
6394 && gfc_set_default_type (sym, 1, NULL) == FAILURE)
6400 if (gfc_check_assign_symbol (sym, init) == FAILURE
6401 || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE)
6409 gfc_error ("Initializing already initialized variable at %C");
6414 t = add_init_expr_to_sym (sym->name, &init, &gfc_current_locus);
6415 return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
6418 gfc_free_expr (init);
6423 /* Match a parameter statement, with the weird syntax that these have. */
6426 gfc_match_parameter (void)
6430 if (gfc_match_char ('(') == MATCH_NO)
6439 if (gfc_match (" )%t") == MATCH_YES)
6442 if (gfc_match_char (',') != MATCH_YES)
6444 gfc_error ("Unexpected characters in PARAMETER statement at %C");
6454 /* Save statements have a special syntax. */
6457 gfc_match_save (void)
6459 char n[GFC_MAX_SYMBOL_LEN+1];
6464 if (gfc_match_eos () == MATCH_YES)
6466 if (gfc_current_ns->seen_save)
6468 if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C "
6469 "follows previous SAVE statement")
6474 gfc_current_ns->save_all = gfc_current_ns->seen_save = 1;
6478 if (gfc_current_ns->save_all)
6480 if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows "
6481 "blanket SAVE statement")
6490 m = gfc_match_symbol (&sym, 0);
6494 if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus)
6506 m = gfc_match (" / %n /", &n);
6507 if (m == MATCH_ERROR)
6512 c = gfc_get_common (n, 0);
6515 gfc_current_ns->seen_save = 1;
6518 if (gfc_match_eos () == MATCH_YES)
6520 if (gfc_match_char (',') != MATCH_YES)
6527 gfc_error ("Syntax error in SAVE statement at %C");
6533 gfc_match_value (void)
6538 /* This is not allowed within a BLOCK construct! */
6539 if (gfc_current_state () == COMP_BLOCK)
6541 gfc_error ("VALUE is not allowed inside of BLOCK at %C");
6545 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C")
6549 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6554 if (gfc_match_eos () == MATCH_YES)
6559 m = gfc_match_symbol (&sym, 0);
6563 if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus)
6576 if (gfc_match_eos () == MATCH_YES)
6578 if (gfc_match_char (',') != MATCH_YES)
6585 gfc_error ("Syntax error in VALUE statement at %C");
6591 gfc_match_volatile (void)
6596 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C")
6600 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6605 if (gfc_match_eos () == MATCH_YES)
6610 /* VOLATILE is special because it can be added to host-associated
6611 symbols locally. Except for coarrays. */
6612 m = gfc_match_symbol (&sym, 1);
6616 /* F2008, C560+C561. VOLATILE for host-/use-associated variable or
6617 for variable in a BLOCK which is defined outside of the BLOCK. */
6618 if (sym->ns != gfc_current_ns && sym->attr.codimension)
6620 gfc_error ("Specifying VOLATILE for coarray variable '%s' at "
6621 "%C, which is use-/host-associated", sym->name);
6624 if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus)
6637 if (gfc_match_eos () == MATCH_YES)
6639 if (gfc_match_char (',') != MATCH_YES)
6646 gfc_error ("Syntax error in VOLATILE statement at %C");
6652 gfc_match_asynchronous (void)
6657 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ASYNCHRONOUS statement at %C")
6661 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6666 if (gfc_match_eos () == MATCH_YES)
6671 /* ASYNCHRONOUS is special because it can be added to host-associated
6673 m = gfc_match_symbol (&sym, 1);
6677 if (gfc_add_asynchronous (&sym->attr, sym->name, &gfc_current_locus)
6690 if (gfc_match_eos () == MATCH_YES)
6692 if (gfc_match_char (',') != MATCH_YES)
6699 gfc_error ("Syntax error in ASYNCHRONOUS statement at %C");
6704 /* Match a module procedure statement. Note that we have to modify
6705 symbols in the parent's namespace because the current one was there
6706 to receive symbols that are in an interface's formal argument list. */
6709 gfc_match_modproc (void)
6711 char name[GFC_MAX_SYMBOL_LEN + 1];
6714 gfc_namespace *module_ns;
6715 gfc_interface *old_interface_head, *interface;
6717 if (gfc_state_stack->state != COMP_INTERFACE
6718 || gfc_state_stack->previous == NULL
6719 || current_interface.type == INTERFACE_NAMELESS
6720 || current_interface.type == INTERFACE_ABSTRACT)
6722 gfc_error ("MODULE PROCEDURE at %C must be in a generic module "
6727 module_ns = gfc_current_ns->parent;
6728 for (; module_ns; module_ns = module_ns->parent)
6729 if (module_ns->proc_name->attr.flavor == FL_MODULE
6730 || module_ns->proc_name->attr.flavor == FL_PROGRAM
6731 || (module_ns->proc_name->attr.flavor == FL_PROCEDURE
6732 && !module_ns->proc_name->attr.contained))
6735 if (module_ns == NULL)
6738 /* Store the current state of the interface. We will need it if we
6739 end up with a syntax error and need to recover. */
6740 old_interface_head = gfc_current_interface_head ();
6744 locus old_locus = gfc_current_locus;
6747 m = gfc_match_name (name);
6753 /* Check for syntax error before starting to add symbols to the
6754 current namespace. */
6755 if (gfc_match_eos () == MATCH_YES)
6757 if (!last && gfc_match_char (',') != MATCH_YES)
6760 /* Now we're sure the syntax is valid, we process this item
6762 if (gfc_get_symbol (name, module_ns, &sym))
6765 if (sym->attr.intrinsic)
6767 gfc_error ("Intrinsic procedure at %L cannot be a MODULE "
6768 "PROCEDURE", &old_locus);
6772 if (sym->attr.proc != PROC_MODULE
6773 && gfc_add_procedure (&sym->attr, PROC_MODULE,
6774 sym->name, NULL) == FAILURE)
6777 if (gfc_add_interface (sym) == FAILURE)
6780 sym->attr.mod_proc = 1;
6781 sym->declared_at = old_locus;
6790 /* Restore the previous state of the interface. */
6791 interface = gfc_current_interface_head ();
6792 gfc_set_current_interface_head (old_interface_head);
6794 /* Free the new interfaces. */
6795 while (interface != old_interface_head)
6797 gfc_interface *i = interface->next;
6798 gfc_free (interface);
6802 /* And issue a syntax error. */
6803 gfc_syntax_error (ST_MODULE_PROC);
6808 /* Check a derived type that is being extended. */
6810 check_extended_derived_type (char *name)
6812 gfc_symbol *extended;
6814 if (gfc_find_symbol (name, gfc_current_ns, 1, &extended))
6816 gfc_error ("Ambiguous symbol in TYPE definition at %C");
6822 gfc_error ("No such symbol in TYPE definition at %C");
6826 if (extended->attr.flavor != FL_DERIVED)
6828 gfc_error ("'%s' in EXTENDS expression at %C is not a "
6829 "derived type", name);
6833 if (extended->attr.is_bind_c)
6835 gfc_error ("'%s' cannot be extended at %C because it "
6836 "is BIND(C)", extended->name);
6840 if (extended->attr.sequence)
6842 gfc_error ("'%s' cannot be extended at %C because it "
6843 "is a SEQUENCE type", extended->name);
6851 /* Match the optional attribute specifiers for a type declaration.
6852 Return MATCH_ERROR if an error is encountered in one of the handled
6853 attributes (public, private, bind(c)), MATCH_NO if what's found is
6854 not a handled attribute, and MATCH_YES otherwise. TODO: More error
6855 checking on attribute conflicts needs to be done. */
6858 gfc_get_type_attr_spec (symbol_attribute *attr, char *name)
6860 /* See if the derived type is marked as private. */
6861 if (gfc_match (" , private") == MATCH_YES)
6863 if (gfc_current_state () != COMP_MODULE)
6865 gfc_error ("Derived type at %C can only be PRIVATE in the "
6866 "specification part of a module");
6870 if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE)
6873 else if (gfc_match (" , public") == MATCH_YES)
6875 if (gfc_current_state () != COMP_MODULE)
6877 gfc_error ("Derived type at %C can only be PUBLIC in the "
6878 "specification part of a module");
6882 if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE)
6885 else if (gfc_match (" , bind ( c )") == MATCH_YES)
6887 /* If the type is defined to be bind(c) it then needs to make
6888 sure that all fields are interoperable. This will
6889 need to be a semantic check on the finished derived type.
6890 See 15.2.3 (lines 9-12) of F2003 draft. */
6891 if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS)
6894 /* TODO: attr conflicts need to be checked, probably in symbol.c. */
6896 else if (gfc_match (" , abstract") == MATCH_YES)
6898 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ABSTRACT type at %C")
6902 if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE)
6905 else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES)
6907 if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE)
6913 /* If we get here, something matched. */
6918 /* Assign a hash value for a derived type. The algorithm is that of
6919 SDBM. The hashed string is '[module_name #] derived_name'. */
6921 hash_value (gfc_symbol *sym)
6923 unsigned int hash = 0;
6927 /* Hash of the module or procedure name. */
6928 if (sym->module != NULL)
6930 else if (sym->ns && sym->ns->proc_name
6931 && sym->ns->proc_name->attr.flavor == FL_MODULE)
6932 c = sym->ns->proc_name->name;
6939 for (i = 0; i < len; i++, c++)
6940 hash = (hash << 6) + (hash << 16) - hash + (*c);
6942 /* Disambiguate between 'a' in 'aa' and 'aa' in 'a'. */
6943 hash = (hash << 6) + (hash << 16) - hash + '#';
6946 /* Hash of the derived type name. */
6947 len = strlen (sym->name);
6949 for (i = 0; i < len; i++, c++)
6950 hash = (hash << 6) + (hash << 16) - hash + (*c);
6952 /* Return the hash but take the modulus for the sake of module read,
6953 even though this slightly increases the chance of collision. */
6954 return (hash % 100000000);
6958 /* Match the beginning of a derived type declaration. If a type name
6959 was the result of a function, then it is possible to have a symbol
6960 already to be known as a derived type yet have no components. */
6963 gfc_match_derived_decl (void)
6965 char name[GFC_MAX_SYMBOL_LEN + 1];
6966 char parent[GFC_MAX_SYMBOL_LEN + 1];
6967 symbol_attribute attr;
6969 gfc_symbol *extended;
6971 match is_type_attr_spec = MATCH_NO;
6972 bool seen_attr = false;
6974 if (gfc_current_state () == COMP_DERIVED)
6979 gfc_clear_attr (&attr);
6984 is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent);
6985 if (is_type_attr_spec == MATCH_ERROR)
6987 if (is_type_attr_spec == MATCH_YES)
6989 } while (is_type_attr_spec == MATCH_YES);
6991 /* Deal with derived type extensions. The extension attribute has
6992 been added to 'attr' but now the parent type must be found and
6995 extended = check_extended_derived_type (parent);
6997 if (parent[0] && !extended)
7000 if (gfc_match (" ::") != MATCH_YES && seen_attr)
7002 gfc_error ("Expected :: in TYPE definition at %C");
7006 m = gfc_match (" %n%t", name);
7010 /* Make sure the name is not the name of an intrinsic type. */
7011 if (gfc_is_intrinsic_typename (name))
7013 gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic "
7018 if (gfc_get_symbol (name, NULL, &sym))
7021 if (sym->ts.type != BT_UNKNOWN)
7023 gfc_error ("Derived type name '%s' at %C already has a basic type "
7024 "of %s", sym->name, gfc_typename (&sym->ts));
7028 /* The symbol may already have the derived attribute without the
7029 components. The ways this can happen is via a function
7030 definition, an INTRINSIC statement or a subtype in another
7031 derived type that is a pointer. The first part of the AND clause
7032 is true if the symbol is not the return value of a function. */
7033 if (sym->attr.flavor != FL_DERIVED
7034 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
7037 if (sym->components != NULL || sym->attr.zero_comp)
7039 gfc_error ("Derived type definition of '%s' at %C has already been "
7040 "defined", sym->name);
7044 if (attr.access != ACCESS_UNKNOWN
7045 && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE)
7048 /* See if the derived type was labeled as bind(c). */
7049 if (attr.is_bind_c != 0)
7050 sym->attr.is_bind_c = attr.is_bind_c;
7052 /* Construct the f2k_derived namespace if it is not yet there. */
7053 if (!sym->f2k_derived)
7054 sym->f2k_derived = gfc_get_namespace (NULL, 0);
7056 if (extended && !sym->components)
7061 /* Add the extended derived type as the first component. */
7062 gfc_add_component (sym, parent, &p);
7064 gfc_set_sym_referenced (extended);
7066 p->ts.type = BT_DERIVED;
7067 p->ts.u.derived = extended;
7068 p->initializer = gfc_default_initializer (&p->ts);
7070 /* Set extension level. */
7071 if (extended->attr.extension == 255)
7073 /* Since the extension field is 8 bit wide, we can only have
7074 up to 255 extension levels. */
7075 gfc_error ("Maximum extension level reached with type '%s' at %L",
7076 extended->name, &extended->declared_at);
7079 sym->attr.extension = extended->attr.extension + 1;
7081 /* Provide the links between the extended type and its extension. */
7082 if (!extended->f2k_derived)
7083 extended->f2k_derived = gfc_get_namespace (NULL, 0);
7084 st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name);
7088 if (!sym->hash_value)
7089 /* Set the hash for the compound name for this type. */
7090 sym->hash_value = hash_value (sym);
7092 /* Take over the ABSTRACT attribute. */
7093 sym->attr.abstract = attr.abstract;
7095 gfc_new_block = sym;
7101 /* Cray Pointees can be declared as:
7102 pointer (ipt, a (n,m,...,*)) */
7105 gfc_mod_pointee_as (gfc_array_spec *as)
7107 as->cray_pointee = true; /* This will be useful to know later. */
7108 if (as->type == AS_ASSUMED_SIZE)
7109 as->cp_was_assumed = true;
7110 else if (as->type == AS_ASSUMED_SHAPE)
7112 gfc_error ("Cray Pointee at %C cannot be assumed shape array");
7119 /* Match the enum definition statement, here we are trying to match
7120 the first line of enum definition statement.
7121 Returns MATCH_YES if match is found. */
7124 gfc_match_enum (void)
7128 m = gfc_match_eos ();
7132 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C")
7140 /* Returns an initializer whose value is one higher than the value of the
7141 LAST_INITIALIZER argument. If the argument is NULL, the
7142 initializers value will be set to zero. The initializer's kind
7143 will be set to gfc_c_int_kind.
7145 If -fshort-enums is given, the appropriate kind will be selected
7146 later after all enumerators have been parsed. A warning is issued
7147 here if an initializer exceeds gfc_c_int_kind. */
7150 enum_initializer (gfc_expr *last_initializer, locus where)
7153 result = gfc_get_constant_expr (BT_INTEGER, gfc_c_int_kind, &where);
7155 mpz_init (result->value.integer);
7157 if (last_initializer != NULL)
7159 mpz_add_ui (result->value.integer, last_initializer->value.integer, 1);
7160 result->where = last_initializer->where;
7162 if (gfc_check_integer_range (result->value.integer,
7163 gfc_c_int_kind) != ARITH_OK)
7165 gfc_error ("Enumerator exceeds the C integer type at %C");
7171 /* Control comes here, if it's the very first enumerator and no
7172 initializer has been given. It will be initialized to zero. */
7173 mpz_set_si (result->value.integer, 0);
7180 /* Match a variable name with an optional initializer. When this
7181 subroutine is called, a variable is expected to be parsed next.
7182 Depending on what is happening at the moment, updates either the
7183 symbol table or the current interface. */
7186 enumerator_decl (void)
7188 char name[GFC_MAX_SYMBOL_LEN + 1];
7189 gfc_expr *initializer;
7190 gfc_array_spec *as = NULL;
7198 old_locus = gfc_current_locus;
7200 /* When we get here, we've just matched a list of attributes and
7201 maybe a type and a double colon. The next thing we expect to see
7202 is the name of the symbol. */
7203 m = gfc_match_name (name);
7207 var_locus = gfc_current_locus;
7209 /* OK, we've successfully matched the declaration. Now put the
7210 symbol in the current namespace. If we fail to create the symbol,
7212 if (build_sym (name, NULL, &as, &var_locus) == FAILURE)
7218 /* The double colon must be present in order to have initializers.
7219 Otherwise the statement is ambiguous with an assignment statement. */
7222 if (gfc_match_char ('=') == MATCH_YES)
7224 m = gfc_match_init_expr (&initializer);
7227 gfc_error ("Expected an initialization expression at %C");
7236 /* If we do not have an initializer, the initialization value of the
7237 previous enumerator (stored in last_initializer) is incremented
7238 by 1 and is used to initialize the current enumerator. */
7239 if (initializer == NULL)
7240 initializer = enum_initializer (last_initializer, old_locus);
7242 if (initializer == NULL || initializer->ts.type != BT_INTEGER)
7244 gfc_error ("ENUMERATOR %L not initialized with integer expression",
7250 /* Store this current initializer, for the next enumerator variable
7251 to be parsed. add_init_expr_to_sym() zeros initializer, so we
7252 use last_initializer below. */
7253 last_initializer = initializer;
7254 t = add_init_expr_to_sym (name, &initializer, &var_locus);
7256 /* Maintain enumerator history. */
7257 gfc_find_symbol (name, NULL, 0, &sym);
7258 create_enum_history (sym, last_initializer);
7260 return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
7263 /* Free stuff up and return. */
7264 gfc_free_expr (initializer);
7270 /* Match the enumerator definition statement. */
7273 gfc_match_enumerator_def (void)
7278 gfc_clear_ts (¤t_ts);
7280 m = gfc_match (" enumerator");
7284 m = gfc_match (" :: ");
7285 if (m == MATCH_ERROR)
7288 colon_seen = (m == MATCH_YES);
7290 if (gfc_current_state () != COMP_ENUM)
7292 gfc_error ("ENUM definition statement expected before %C");
7293 gfc_free_enum_history ();
7297 (¤t_ts)->type = BT_INTEGER;
7298 (¤t_ts)->kind = gfc_c_int_kind;
7300 gfc_clear_attr (¤t_attr);
7301 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL);
7310 m = enumerator_decl ();
7311 if (m == MATCH_ERROR)
7313 gfc_free_enum_history ();
7319 if (gfc_match_eos () == MATCH_YES)
7321 if (gfc_match_char (',') != MATCH_YES)
7325 if (gfc_current_state () == COMP_ENUM)
7327 gfc_free_enum_history ();
7328 gfc_error ("Syntax error in ENUMERATOR definition at %C");
7333 gfc_free_array_spec (current_as);
7340 /* Match binding attributes. */
7343 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc)
7345 bool found_passing = false;
7346 bool seen_ptr = false;
7347 match m = MATCH_YES;
7349 /* Intialize to defaults. Do so even before the MATCH_NO check so that in
7350 this case the defaults are in there. */
7351 ba->access = ACCESS_UNKNOWN;
7352 ba->pass_arg = NULL;
7353 ba->pass_arg_num = 0;
7355 ba->non_overridable = 0;
7359 /* If we find a comma, we believe there are binding attributes. */
7360 m = gfc_match_char (',');
7366 /* Access specifier. */
7368 m = gfc_match (" public");
7369 if (m == MATCH_ERROR)
7373 if (ba->access != ACCESS_UNKNOWN)
7375 gfc_error ("Duplicate access-specifier at %C");
7379 ba->access = ACCESS_PUBLIC;
7383 m = gfc_match (" private");
7384 if (m == MATCH_ERROR)
7388 if (ba->access != ACCESS_UNKNOWN)
7390 gfc_error ("Duplicate access-specifier at %C");
7394 ba->access = ACCESS_PRIVATE;
7398 /* If inside GENERIC, the following is not allowed. */
7403 m = gfc_match (" nopass");
7404 if (m == MATCH_ERROR)
7410 gfc_error ("Binding attributes already specify passing,"
7411 " illegal NOPASS at %C");
7415 found_passing = true;
7420 /* PASS possibly including argument. */
7421 m = gfc_match (" pass");
7422 if (m == MATCH_ERROR)
7426 char arg[GFC_MAX_SYMBOL_LEN + 1];
7430 gfc_error ("Binding attributes already specify passing,"
7431 " illegal PASS at %C");
7435 m = gfc_match (" ( %n )", arg);
7436 if (m == MATCH_ERROR)
7439 ba->pass_arg = gfc_get_string (arg);
7440 gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL));
7442 found_passing = true;
7450 m = gfc_match (" pointer");
7451 if (m == MATCH_ERROR)
7457 gfc_error ("Duplicate POINTER attribute at %C");
7467 /* NON_OVERRIDABLE flag. */
7468 m = gfc_match (" non_overridable");
7469 if (m == MATCH_ERROR)
7473 if (ba->non_overridable)
7475 gfc_error ("Duplicate NON_OVERRIDABLE at %C");
7479 ba->non_overridable = 1;
7483 /* DEFERRED flag. */
7484 m = gfc_match (" deferred");
7485 if (m == MATCH_ERROR)
7491 gfc_error ("Duplicate DEFERRED at %C");
7502 /* Nothing matching found. */
7504 gfc_error ("Expected access-specifier at %C");
7506 gfc_error ("Expected binding attribute at %C");
7509 while (gfc_match_char (',') == MATCH_YES);
7511 /* NON_OVERRIDABLE and DEFERRED exclude themselves. */
7512 if (ba->non_overridable && ba->deferred)
7514 gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C");
7521 if (ba->access == ACCESS_UNKNOWN)
7522 ba->access = gfc_typebound_default_access;
7524 if (ppc && !seen_ptr)
7526 gfc_error ("POINTER attribute is required for procedure pointer component"
7538 /* Match a PROCEDURE specific binding inside a derived type. */
7541 match_procedure_in_type (void)
7543 char name[GFC_MAX_SYMBOL_LEN + 1];
7544 char target_buf[GFC_MAX_SYMBOL_LEN + 1];
7545 char* target = NULL, *ifc = NULL;
7546 gfc_typebound_proc* tb;
7555 /* Check current state. */
7556 gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS);
7557 block = gfc_state_stack->previous->sym;
7560 /* Try to match PROCEDURE(interface). */
7561 if (gfc_match (" (") == MATCH_YES)
7563 m = gfc_match_name (target_buf);
7564 if (m == MATCH_ERROR)
7568 gfc_error ("Interface-name expected after '(' at %C");
7572 if (gfc_match (" )") != MATCH_YES)
7574 gfc_error ("')' expected at %C");
7581 /* Construct the data structure. */
7582 tb = gfc_get_typebound_proc ();
7583 tb->where = gfc_current_locus;
7586 /* Match binding attributes. */
7587 m = match_binding_attributes (tb, false, false);
7588 if (m == MATCH_ERROR)
7590 seen_attrs = (m == MATCH_YES);
7592 /* Check that attribute DEFERRED is given if an interface is specified. */
7593 if (tb->deferred && !ifc)
7595 gfc_error ("Interface must be specified for DEFERRED binding at %C");
7598 if (ifc && !tb->deferred)
7600 gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED");
7604 /* Match the colons. */
7605 m = gfc_match (" ::");
7606 if (m == MATCH_ERROR)
7608 seen_colons = (m == MATCH_YES);
7609 if (seen_attrs && !seen_colons)
7611 gfc_error ("Expected '::' after binding-attributes at %C");
7615 /* Match the binding names. */
7618 m = gfc_match_name (name);
7619 if (m == MATCH_ERROR)
7623 gfc_error ("Expected binding name at %C");
7627 if (num>1 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: PROCEDURE list"
7628 " at %C") == FAILURE)
7631 /* Try to match the '=> target', if it's there. */
7633 m = gfc_match (" =>");
7634 if (m == MATCH_ERROR)
7640 gfc_error ("'=> target' is invalid for DEFERRED binding at %C");
7646 gfc_error ("'::' needed in PROCEDURE binding with explicit target"
7651 m = gfc_match_name (target_buf);
7652 if (m == MATCH_ERROR)
7656 gfc_error ("Expected binding target after '=>' at %C");
7659 target = target_buf;
7662 /* If no target was found, it has the same name as the binding. */
7666 /* Get the namespace to insert the symbols into. */
7667 ns = block->f2k_derived;
7670 /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */
7671 if (tb->deferred && !block->attr.abstract)
7673 gfc_error ("Type '%s' containing DEFERRED binding at %C "
7674 "is not ABSTRACT", block->name);
7678 /* See if we already have a binding with this name in the symtree which
7679 would be an error. If a GENERIC already targetted this binding, it may
7680 be already there but then typebound is still NULL. */
7681 stree = gfc_find_symtree (ns->tb_sym_root, name);
7682 if (stree && stree->n.tb)
7684 gfc_error ("There is already a procedure with binding name '%s' for "
7685 "the derived type '%s' at %C", name, block->name);
7689 /* Insert it and set attributes. */
7693 stree = gfc_new_symtree (&ns->tb_sym_root, name);
7698 if (gfc_get_sym_tree (target, gfc_current_ns, &tb->u.specific, false))
7700 gfc_set_sym_referenced (tb->u.specific->n.sym);
7702 if (gfc_match_eos () == MATCH_YES)
7704 if (gfc_match_char (',') != MATCH_YES)
7709 gfc_error ("Syntax error in PROCEDURE statement at %C");
7714 /* Match a GENERIC procedure binding inside a derived type. */
7717 gfc_match_generic (void)
7719 char name[GFC_MAX_SYMBOL_LEN + 1];
7720 char bind_name[GFC_MAX_SYMBOL_LEN + 16]; /* Allow space for OPERATOR(...). */
7722 gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */
7723 gfc_typebound_proc* tb;
7725 interface_type op_type;
7726 gfc_intrinsic_op op;
7729 /* Check current state. */
7730 if (gfc_current_state () == COMP_DERIVED)
7732 gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS");
7735 if (gfc_current_state () != COMP_DERIVED_CONTAINS)
7737 block = gfc_state_stack->previous->sym;
7738 ns = block->f2k_derived;
7739 gcc_assert (block && ns);
7741 /* See if we get an access-specifier. */
7742 m = match_binding_attributes (&tbattr, true, false);
7743 if (m == MATCH_ERROR)
7746 /* Now the colons, those are required. */
7747 if (gfc_match (" ::") != MATCH_YES)
7749 gfc_error ("Expected '::' at %C");
7753 /* Match the binding name; depending on type (operator / generic) format
7754 it for future error messages into bind_name. */
7756 m = gfc_match_generic_spec (&op_type, name, &op);
7757 if (m == MATCH_ERROR)
7761 gfc_error ("Expected generic name or operator descriptor at %C");
7767 case INTERFACE_GENERIC:
7768 snprintf (bind_name, sizeof (bind_name), "%s", name);
7771 case INTERFACE_USER_OP:
7772 snprintf (bind_name, sizeof (bind_name), "OPERATOR(.%s.)", name);
7775 case INTERFACE_INTRINSIC_OP:
7776 snprintf (bind_name, sizeof (bind_name), "OPERATOR(%s)",
7777 gfc_op2string (op));
7784 /* Match the required =>. */
7785 if (gfc_match (" =>") != MATCH_YES)
7787 gfc_error ("Expected '=>' at %C");
7791 /* Try to find existing GENERIC binding with this name / for this operator;
7792 if there is something, check that it is another GENERIC and then extend
7793 it rather than building a new node. Otherwise, create it and put it
7794 at the right position. */
7798 case INTERFACE_USER_OP:
7799 case INTERFACE_GENERIC:
7801 const bool is_op = (op_type == INTERFACE_USER_OP);
7804 st = gfc_find_symtree (is_op ? ns->tb_uop_root : ns->tb_sym_root, name);
7816 case INTERFACE_INTRINSIC_OP:
7826 if (!tb->is_generic)
7828 gcc_assert (op_type == INTERFACE_GENERIC);
7829 gfc_error ("There's already a non-generic procedure with binding name"
7830 " '%s' for the derived type '%s' at %C",
7831 bind_name, block->name);
7835 if (tb->access != tbattr.access)
7837 gfc_error ("Binding at %C must have the same access as already"
7838 " defined binding '%s'", bind_name);
7844 tb = gfc_get_typebound_proc ();
7845 tb->where = gfc_current_locus;
7846 tb->access = tbattr.access;
7848 tb->u.generic = NULL;
7852 case INTERFACE_GENERIC:
7853 case INTERFACE_USER_OP:
7855 const bool is_op = (op_type == INTERFACE_USER_OP);
7858 st = gfc_new_symtree (is_op ? &ns->tb_uop_root : &ns->tb_sym_root,
7866 case INTERFACE_INTRINSIC_OP:
7875 /* Now, match all following names as specific targets. */
7878 gfc_symtree* target_st;
7879 gfc_tbp_generic* target;
7881 m = gfc_match_name (name);
7882 if (m == MATCH_ERROR)
7886 gfc_error ("Expected specific binding name at %C");
7890 target_st = gfc_get_tbp_symtree (&ns->tb_sym_root, name);
7892 /* See if this is a duplicate specification. */
7893 for (target = tb->u.generic; target; target = target->next)
7894 if (target_st == target->specific_st)
7896 gfc_error ("'%s' already defined as specific binding for the"
7897 " generic '%s' at %C", name, bind_name);
7901 target = gfc_get_tbp_generic ();
7902 target->specific_st = target_st;
7903 target->specific = NULL;
7904 target->next = tb->u.generic;
7905 tb->u.generic = target;
7907 while (gfc_match (" ,") == MATCH_YES);
7909 /* Here should be the end. */
7910 if (gfc_match_eos () != MATCH_YES)
7912 gfc_error ("Junk after GENERIC binding at %C");
7923 /* Match a FINAL declaration inside a derived type. */
7926 gfc_match_final_decl (void)
7928 char name[GFC_MAX_SYMBOL_LEN + 1];
7931 gfc_namespace* module_ns;
7935 if (gfc_current_form == FORM_FREE)
7937 char c = gfc_peek_ascii_char ();
7938 if (!gfc_is_whitespace (c) && c != ':')
7942 if (gfc_state_stack->state != COMP_DERIVED_CONTAINS)
7944 if (gfc_current_form == FORM_FIXED)
7947 gfc_error ("FINAL declaration at %C must be inside a derived type "
7948 "CONTAINS section");
7952 block = gfc_state_stack->previous->sym;
7955 if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous
7956 || gfc_state_stack->previous->previous->state != COMP_MODULE)
7958 gfc_error ("Derived type declaration with FINAL at %C must be in the"
7959 " specification part of a MODULE");
7963 module_ns = gfc_current_ns;
7964 gcc_assert (module_ns);
7965 gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE);
7967 /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */
7968 if (gfc_match (" ::") == MATCH_ERROR)
7971 /* Match the sequence of procedure names. */
7978 if (first && gfc_match_eos () == MATCH_YES)
7980 gfc_error ("Empty FINAL at %C");
7984 m = gfc_match_name (name);
7987 gfc_error ("Expected module procedure name at %C");
7990 else if (m != MATCH_YES)
7993 if (gfc_match_eos () == MATCH_YES)
7995 if (!last && gfc_match_char (',') != MATCH_YES)
7997 gfc_error ("Expected ',' at %C");
8001 if (gfc_get_symbol (name, module_ns, &sym))
8003 gfc_error ("Unknown procedure name \"%s\" at %C", name);
8007 /* Mark the symbol as module procedure. */
8008 if (sym->attr.proc != PROC_MODULE
8009 && gfc_add_procedure (&sym->attr, PROC_MODULE,
8010 sym->name, NULL) == FAILURE)
8013 /* Check if we already have this symbol in the list, this is an error. */
8014 for (f = block->f2k_derived->finalizers; f; f = f->next)
8015 if (f->proc_sym == sym)
8017 gfc_error ("'%s' at %C is already defined as FINAL procedure!",
8022 /* Add this symbol to the list of finalizers. */
8023 gcc_assert (block->f2k_derived);
8025 f = XCNEW (gfc_finalizer);
8027 f->proc_tree = NULL;
8028 f->where = gfc_current_locus;
8029 f->next = block->f2k_derived->finalizers;
8030 block->f2k_derived->finalizers = f;
8040 const ext_attr_t ext_attr_list[] = {
8041 { "dllimport", EXT_ATTR_DLLIMPORT, "dllimport" },
8042 { "dllexport", EXT_ATTR_DLLEXPORT, "dllexport" },
8043 { "cdecl", EXT_ATTR_CDECL, "cdecl" },
8044 { "stdcall", EXT_ATTR_STDCALL, "stdcall" },
8045 { "fastcall", EXT_ATTR_FASTCALL, "fastcall" },
8046 { NULL, EXT_ATTR_LAST, NULL }
8049 /* Match a !GCC$ ATTRIBUTES statement of the form:
8050 !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ...
8051 When we come here, we have already matched the !GCC$ ATTRIBUTES string.
8053 TODO: We should support all GCC attributes using the same syntax for
8054 the attribute list, i.e. the list in C
8055 __attributes(( attribute-list ))
8057 !GCC$ ATTRIBUTES attribute-list ::
8058 Cf. c-parser.c's c_parser_attributes; the data can then directly be
8061 As there is absolutely no risk of confusion, we should never return
8064 gfc_match_gcc_attributes (void)
8066 symbol_attribute attr;
8067 char name[GFC_MAX_SYMBOL_LEN + 1];
8072 gfc_clear_attr (&attr);
8077 if (gfc_match_name (name) != MATCH_YES)
8080 for (id = 0; id < EXT_ATTR_LAST; id++)
8081 if (strcmp (name, ext_attr_list[id].name) == 0)
8084 if (id == EXT_ATTR_LAST)
8086 gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C");
8090 if (gfc_add_ext_attribute (&attr, (ext_attr_id_t) id, &gfc_current_locus)
8094 gfc_gobble_whitespace ();
8095 ch = gfc_next_ascii_char ();
8098 /* This is the successful exit condition for the loop. */
8099 if (gfc_next_ascii_char () == ':')
8109 if (gfc_match_eos () == MATCH_YES)
8114 m = gfc_match_name (name);
8118 if (find_special (name, &sym, true))
8121 sym->attr.ext_attr |= attr.ext_attr;
8123 if (gfc_match_eos () == MATCH_YES)
8126 if (gfc_match_char (',') != MATCH_YES)
8133 gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C");