1 /* Declaration statement matcher
2 Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
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"
31 /* Macros to access allocate memory for gfc_data_variable,
32 gfc_data_value and gfc_data. */
33 #define gfc_get_data_variable() XCNEW (gfc_data_variable)
34 #define gfc_get_data_value() XCNEW (gfc_data_value)
35 #define gfc_get_data() XCNEW (gfc_data)
38 static gfc_try set_binding_label (const char **, const char *, int);
41 /* This flag is set if an old-style length selector is matched
42 during a type-declaration statement. */
44 static int old_char_selector;
46 /* When variables acquire types and attributes from a declaration
47 statement, they get them from the following static variables. The
48 first part of a declaration sets these variables and the second
49 part copies these into symbol structures. */
51 static gfc_typespec current_ts;
53 static symbol_attribute current_attr;
54 static gfc_array_spec *current_as;
55 static int colon_seen;
57 /* The current binding label (if any). */
58 static const char* curr_binding_label;
59 /* Need to know how many identifiers are on the current data declaration
60 line in case we're given the BIND(C) attribute with a NAME= specifier. */
61 static int num_idents_on_line;
62 /* Need to know if a NAME= specifier was found during gfc_match_bind_c so we
63 can supply a name if the curr_binding_label is nil and NAME= was not. */
64 static int has_name_equals = 0;
66 /* Initializer of the previous enumerator. */
68 static gfc_expr *last_initializer;
70 /* History of all the enumerators is maintained, so that
71 kind values of all the enumerators could be updated depending
72 upon the maximum initialized value. */
74 typedef struct enumerator_history
77 gfc_expr *initializer;
78 struct enumerator_history *next;
82 /* Header of enum history chain. */
84 static enumerator_history *enum_history = NULL;
86 /* Pointer of enum history node containing largest initializer. */
88 static enumerator_history *max_enum = NULL;
90 /* gfc_new_block points to the symbol of a newly matched block. */
92 gfc_symbol *gfc_new_block;
94 bool gfc_matching_function;
97 /********************* DATA statement subroutines *********************/
99 static bool in_match_data = false;
102 gfc_in_match_data (void)
104 return in_match_data;
108 set_in_match_data (bool set_value)
110 in_match_data = set_value;
113 /* Free a gfc_data_variable structure and everything beneath it. */
116 free_variable (gfc_data_variable *p)
118 gfc_data_variable *q;
123 gfc_free_expr (p->expr);
124 gfc_free_iterator (&p->iter, 0);
125 free_variable (p->list);
131 /* Free a gfc_data_value structure and everything beneath it. */
134 free_value (gfc_data_value *p)
141 mpz_clear (p->repeat);
142 gfc_free_expr (p->expr);
148 /* Free a list of gfc_data structures. */
151 gfc_free_data (gfc_data *p)
158 free_variable (p->var);
159 free_value (p->value);
165 /* Free all data in a namespace. */
168 gfc_free_data_all (gfc_namespace *ns)
181 static match var_element (gfc_data_variable *);
183 /* Match a list of variables terminated by an iterator and a right
187 var_list (gfc_data_variable *parent)
189 gfc_data_variable *tail, var;
192 m = var_element (&var);
193 if (m == MATCH_ERROR)
198 tail = gfc_get_data_variable ();
205 if (gfc_match_char (',') != MATCH_YES)
208 m = gfc_match_iterator (&parent->iter, 1);
211 if (m == MATCH_ERROR)
214 m = var_element (&var);
215 if (m == MATCH_ERROR)
220 tail->next = gfc_get_data_variable ();
226 if (gfc_match_char (')') != MATCH_YES)
231 gfc_syntax_error (ST_DATA);
236 /* Match a single element in a data variable list, which can be a
237 variable-iterator list. */
240 var_element (gfc_data_variable *new_var)
245 memset (new_var, 0, sizeof (gfc_data_variable));
247 if (gfc_match_char ('(') == MATCH_YES)
248 return var_list (new_var);
250 m = gfc_match_variable (&new_var->expr, 0);
254 sym = new_var->expr->symtree->n.sym;
256 /* Symbol should already have an associated type. */
257 if (gfc_check_symbol_typed (sym, gfc_current_ns,
258 false, gfc_current_locus) == FAILURE)
261 if (!sym->attr.function && gfc_current_ns->parent
262 && gfc_current_ns->parent == sym->ns)
264 gfc_error ("Host associated variable '%s' may not be in the DATA "
265 "statement at %C", sym->name);
269 if (gfc_current_state () != COMP_BLOCK_DATA
270 && sym->attr.in_common
271 && gfc_notify_std (GFC_STD_GNU, "Extension: initialization of "
272 "common block variable '%s' in DATA statement at %C",
273 sym->name) == FAILURE)
276 if (gfc_add_data (&sym->attr, sym->name, &new_var->expr->where) == FAILURE)
283 /* Match the top-level list of data variables. */
286 top_var_list (gfc_data *d)
288 gfc_data_variable var, *tail, *new_var;
295 m = var_element (&var);
298 if (m == MATCH_ERROR)
301 new_var = gfc_get_data_variable ();
307 tail->next = new_var;
311 if (gfc_match_char ('/') == MATCH_YES)
313 if (gfc_match_char (',') != MATCH_YES)
320 gfc_syntax_error (ST_DATA);
321 gfc_free_data_all (gfc_current_ns);
327 match_data_constant (gfc_expr **result)
329 char name[GFC_MAX_SYMBOL_LEN + 1];
330 gfc_symbol *sym, *dt_sym = NULL;
335 m = gfc_match_literal_constant (&expr, 1);
342 if (m == MATCH_ERROR)
345 m = gfc_match_null (result);
349 old_loc = gfc_current_locus;
351 /* Should this be a structure component, try to match it
352 before matching a name. */
353 m = gfc_match_rvalue (result);
354 if (m == MATCH_ERROR)
357 if (m == MATCH_YES && (*result)->expr_type == EXPR_STRUCTURE)
359 if (gfc_simplify_expr (*result, 0) == FAILURE)
364 gfc_current_locus = old_loc;
366 m = gfc_match_name (name);
370 if (gfc_find_symbol (name, NULL, 1, &sym))
373 if (sym && sym->attr.generic)
374 dt_sym = gfc_find_dt_in_generic (sym);
377 || (sym->attr.flavor != FL_PARAMETER
378 && (!dt_sym || dt_sym->attr.flavor != FL_DERIVED)))
380 gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C",
384 else if (dt_sym && dt_sym->attr.flavor == FL_DERIVED)
385 return gfc_match_structure_constructor (dt_sym, result);
387 /* Check to see if the value is an initialization array expression. */
388 if (sym->value->expr_type == EXPR_ARRAY)
390 gfc_current_locus = old_loc;
392 m = gfc_match_init_expr (result);
393 if (m == MATCH_ERROR)
398 if (gfc_simplify_expr (*result, 0) == FAILURE)
401 if ((*result)->expr_type == EXPR_CONSTANT)
405 gfc_error ("Invalid initializer %s in Data statement at %C", name);
411 *result = gfc_copy_expr (sym->value);
416 /* Match a list of values in a DATA statement. The leading '/' has
417 already been seen at this point. */
420 top_val_list (gfc_data *data)
422 gfc_data_value *new_val, *tail;
430 m = match_data_constant (&expr);
433 if (m == MATCH_ERROR)
436 new_val = gfc_get_data_value ();
437 mpz_init (new_val->repeat);
440 data->value = new_val;
442 tail->next = new_val;
446 if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES)
449 mpz_set_ui (tail->repeat, 1);
453 if (expr->ts.type == BT_INTEGER)
454 mpz_set (tail->repeat, expr->value.integer);
455 gfc_free_expr (expr);
457 m = match_data_constant (&tail->expr);
460 if (m == MATCH_ERROR)
464 if (gfc_match_char ('/') == MATCH_YES)
466 if (gfc_match_char (',') == MATCH_NO)
473 gfc_syntax_error (ST_DATA);
474 gfc_free_data_all (gfc_current_ns);
479 /* Matches an old style initialization. */
482 match_old_style_init (const char *name)
489 /* Set up data structure to hold initializers. */
490 gfc_find_sym_tree (name, NULL, 0, &st);
493 newdata = gfc_get_data ();
494 newdata->var = gfc_get_data_variable ();
495 newdata->var->expr = gfc_get_variable_expr (st);
496 newdata->where = gfc_current_locus;
498 /* Match initial value list. This also eats the terminal '/'. */
499 m = top_val_list (newdata);
508 gfc_error ("Initialization at %C is not allowed in a PURE procedure");
513 if (gfc_implicit_pure (NULL))
514 gfc_current_ns->proc_name->attr.implicit_pure = 0;
516 /* Mark the variable as having appeared in a data statement. */
517 if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE)
523 /* Chain in namespace list of DATA initializers. */
524 newdata->next = gfc_current_ns->data;
525 gfc_current_ns->data = newdata;
531 /* Match the stuff following a DATA statement. If ERROR_FLAG is set,
532 we are matching a DATA statement and are therefore issuing an error
533 if we encounter something unexpected, if not, we're trying to match
534 an old-style initialization expression of the form INTEGER I /2/. */
537 gfc_match_data (void)
542 set_in_match_data (true);
546 new_data = gfc_get_data ();
547 new_data->where = gfc_current_locus;
549 m = top_var_list (new_data);
553 m = top_val_list (new_data);
557 new_data->next = gfc_current_ns->data;
558 gfc_current_ns->data = new_data;
560 if (gfc_match_eos () == MATCH_YES)
563 gfc_match_char (','); /* Optional comma */
566 set_in_match_data (false);
570 gfc_error ("DATA statement at %C is not allowed in a PURE procedure");
574 if (gfc_implicit_pure (NULL))
575 gfc_current_ns->proc_name->attr.implicit_pure = 0;
580 set_in_match_data (false);
581 gfc_free_data (new_data);
586 /************************ Declaration statements *********************/
589 /* Auxilliary function to merge DIMENSION and CODIMENSION array specs. */
592 merge_array_spec (gfc_array_spec *from, gfc_array_spec *to, bool copy)
596 if (to->rank == 0 && from->rank > 0)
598 to->rank = from->rank;
599 to->type = from->type;
600 to->cray_pointee = from->cray_pointee;
601 to->cp_was_assumed = from->cp_was_assumed;
603 for (i = 0; i < to->corank; i++)
605 to->lower[from->rank + i] = to->lower[i];
606 to->upper[from->rank + i] = to->upper[i];
608 for (i = 0; i < from->rank; i++)
612 to->lower[i] = gfc_copy_expr (from->lower[i]);
613 to->upper[i] = gfc_copy_expr (from->upper[i]);
617 to->lower[i] = from->lower[i];
618 to->upper[i] = from->upper[i];
622 else if (to->corank == 0 && from->corank > 0)
624 to->corank = from->corank;
625 to->cotype = from->cotype;
627 for (i = 0; i < from->corank; i++)
631 to->lower[to->rank + i] = gfc_copy_expr (from->lower[i]);
632 to->upper[to->rank + i] = gfc_copy_expr (from->upper[i]);
636 to->lower[to->rank + i] = from->lower[i];
637 to->upper[to->rank + i] = from->upper[i];
644 /* Match an intent specification. Since this can only happen after an
645 INTENT word, a legal intent-spec must follow. */
648 match_intent_spec (void)
651 if (gfc_match (" ( in out )") == MATCH_YES)
653 if (gfc_match (" ( in )") == MATCH_YES)
655 if (gfc_match (" ( out )") == MATCH_YES)
658 gfc_error ("Bad INTENT specification at %C");
659 return INTENT_UNKNOWN;
663 /* Matches a character length specification, which is either a
664 specification expression, '*', or ':'. */
667 char_len_param_value (gfc_expr **expr, bool *deferred)
674 if (gfc_match_char ('*') == MATCH_YES)
677 if (gfc_match_char (':') == MATCH_YES)
679 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: deferred type "
680 "parameter at %C") == FAILURE)
688 m = gfc_match_expr (expr);
691 && gfc_expr_check_typed (*expr, gfc_current_ns, false) == FAILURE)
694 if (m == MATCH_YES && (*expr)->expr_type == EXPR_FUNCTION)
696 if ((*expr)->value.function.actual
697 && (*expr)->value.function.actual->expr->symtree)
700 e = (*expr)->value.function.actual->expr;
701 if (e->symtree->n.sym->attr.flavor == FL_PROCEDURE
702 && e->expr_type == EXPR_VARIABLE)
704 if (e->symtree->n.sym->ts.type == BT_UNKNOWN)
706 if (e->symtree->n.sym->ts.type == BT_CHARACTER
707 && e->symtree->n.sym->ts.u.cl
708 && e->symtree->n.sym->ts.u.cl->length->ts.type == BT_UNKNOWN)
716 gfc_error ("Conflict in attributes of function argument at %C");
721 /* A character length is a '*' followed by a literal integer or a
722 char_len_param_value in parenthesis. */
725 match_char_length (gfc_expr **expr, bool *deferred)
731 m = gfc_match_char ('*');
735 m = gfc_match_small_literal_int (&length, NULL);
736 if (m == MATCH_ERROR)
741 if (gfc_notify_std (GFC_STD_F95_OBS, "Obsolescent feature: "
742 "Old-style character length at %C") == FAILURE)
744 *expr = gfc_get_int_expr (gfc_default_integer_kind, NULL, length);
748 if (gfc_match_char ('(') == MATCH_NO)
751 m = char_len_param_value (expr, deferred);
752 if (m != MATCH_YES && gfc_matching_function)
758 if (m == MATCH_ERROR)
763 if (gfc_match_char (')') == MATCH_NO)
765 gfc_free_expr (*expr);
773 gfc_error ("Syntax error in character length specification at %C");
778 /* Special subroutine for finding a symbol. Check if the name is found
779 in the current name space. If not, and we're compiling a function or
780 subroutine and the parent compilation unit is an interface, then check
781 to see if the name we've been given is the name of the interface
782 (located in another namespace). */
785 find_special (const char *name, gfc_symbol **result, bool allow_subroutine)
791 i = gfc_get_sym_tree (name, NULL, &st, allow_subroutine);
794 *result = st ? st->n.sym : NULL;
798 if (gfc_current_state () != COMP_SUBROUTINE
799 && gfc_current_state () != COMP_FUNCTION)
802 s = gfc_state_stack->previous;
806 if (s->state != COMP_INTERFACE)
809 goto end; /* Nameless interface. */
811 if (strcmp (name, s->sym->name) == 0)
822 /* Special subroutine for getting a symbol node associated with a
823 procedure name, used in SUBROUTINE and FUNCTION statements. The
824 symbol is created in the parent using with symtree node in the
825 child unit pointing to the symbol. If the current namespace has no
826 parent, then the symbol is just created in the current unit. */
829 get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry)
835 /* Module functions have to be left in their own namespace because
836 they have potentially (almost certainly!) already been referenced.
837 In this sense, they are rather like external functions. This is
838 fixed up in resolve.c(resolve_entries), where the symbol name-
839 space is set to point to the master function, so that the fake
840 result mechanism can work. */
841 if (module_fcn_entry)
843 /* Present if entry is declared to be a module procedure. */
844 rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result);
847 rc = gfc_get_symbol (name, NULL, result);
848 else if (!gfc_get_symbol (name, NULL, &sym) && sym
849 && (*result)->ts.type == BT_UNKNOWN
850 && sym->attr.flavor == FL_UNKNOWN)
851 /* Pick up the typespec for the entry, if declared in the function
852 body. Note that this symbol is FL_UNKNOWN because it will
853 only have appeared in a type declaration. The local symtree
854 is set to point to the module symbol and a unique symtree
855 to the local version. This latter ensures a correct clearing
858 /* If the ENTRY proceeds its specification, we need to ensure
859 that this does not raise a "has no IMPLICIT type" error. */
860 if (sym->ts.type == BT_UNKNOWN)
861 sym->attr.untyped = 1;
863 (*result)->ts = sym->ts;
865 /* Put the symbol in the procedure namespace so that, should
866 the ENTRY precede its specification, the specification
868 (*result)->ns = gfc_current_ns;
870 gfc_find_sym_tree (name, gfc_current_ns, 0, &st);
872 st = gfc_get_unique_symtree (gfc_current_ns);
877 rc = gfc_get_symbol (name, gfc_current_ns->parent, result);
883 gfc_current_ns->refs++;
885 if (sym && !sym->gfc_new && gfc_current_state () != COMP_INTERFACE)
887 /* Trap another encompassed procedure with the same name. All
888 these conditions are necessary to avoid picking up an entry
889 whose name clashes with that of the encompassing procedure;
890 this is handled using gsymbols to register unique,globally
892 if (sym->attr.flavor != 0
893 && sym->attr.proc != 0
894 && (sym->attr.subroutine || sym->attr.function)
895 && sym->attr.if_source != IFSRC_UNKNOWN)
896 gfc_error_now ("Procedure '%s' at %C is already defined at %L",
897 name, &sym->declared_at);
899 /* Trap a procedure with a name the same as interface in the
900 encompassing scope. */
901 if (sym->attr.generic != 0
902 && (sym->attr.subroutine || sym->attr.function)
903 && !sym->attr.mod_proc)
904 gfc_error_now ("Name '%s' at %C is already defined"
905 " as a generic interface at %L",
906 name, &sym->declared_at);
908 /* Trap declarations of attributes in encompassing scope. The
909 signature for this is that ts.kind is set. Legitimate
910 references only set ts.type. */
911 if (sym->ts.kind != 0
912 && !sym->attr.implicit_type
913 && sym->attr.proc == 0
914 && gfc_current_ns->parent != NULL
915 && sym->attr.access == 0
916 && !module_fcn_entry)
917 gfc_error_now ("Procedure '%s' at %C has an explicit interface "
918 "and must not have attributes declared at %L",
919 name, &sym->declared_at);
922 if (gfc_current_ns->parent == NULL || *result == NULL)
925 /* Module function entries will already have a symtree in
926 the current namespace but will need one at module level. */
927 if (module_fcn_entry)
929 /* Present if entry is declared to be a module procedure. */
930 rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st);
932 st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name);
935 st = gfc_new_symtree (&gfc_current_ns->sym_root, name);
940 /* See if the procedure should be a module procedure. */
942 if (((sym->ns->proc_name != NULL
943 && sym->ns->proc_name->attr.flavor == FL_MODULE
944 && sym->attr.proc != PROC_MODULE)
945 || (module_fcn_entry && sym->attr.proc != PROC_MODULE))
946 && gfc_add_procedure (&sym->attr, PROC_MODULE,
947 sym->name, NULL) == FAILURE)
954 /* Verify that the given symbol representing a parameter is C
955 interoperable, by checking to see if it was marked as such after
956 its declaration. If the given symbol is not interoperable, a
957 warning is reported, thus removing the need to return the status to
958 the calling function. The standard does not require the user use
959 one of the iso_c_binding named constants to declare an
960 interoperable parameter, but we can't be sure if the param is C
961 interop or not if the user doesn't. For example, integer(4) may be
962 legal Fortran, but doesn't have meaning in C. It may interop with
963 a number of the C types, which causes a problem because the
964 compiler can't know which one. This code is almost certainly not
965 portable, and the user will get what they deserve if the C type
966 across platforms isn't always interoperable with integer(4). If
967 the user had used something like integer(c_int) or integer(c_long),
968 the compiler could have automatically handled the varying sizes
972 gfc_verify_c_interop_param (gfc_symbol *sym)
974 int is_c_interop = 0;
975 gfc_try retval = SUCCESS;
977 /* We check implicitly typed variables in symbol.c:gfc_set_default_type().
978 Don't repeat the checks here. */
979 if (sym->attr.implicit_type)
982 /* For subroutines or functions that are passed to a BIND(C) procedure,
983 they're interoperable if they're BIND(C) and their params are all
985 if (sym->attr.flavor == FL_PROCEDURE)
987 if (sym->attr.is_bind_c == 0)
989 gfc_error_now ("Procedure '%s' at %L must have the BIND(C) "
990 "attribute to be C interoperable", sym->name,
991 &(sym->declared_at));
997 if (sym->attr.is_c_interop == 1)
998 /* We've already checked this procedure; don't check it again. */
1001 return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common,
1006 /* See if we've stored a reference to a procedure that owns sym. */
1007 if (sym->ns != NULL && sym->ns->proc_name != NULL)
1009 if (sym->ns->proc_name->attr.is_bind_c == 1)
1011 is_c_interop = (gfc_verify_c_interop (&(sym->ts)) == SUCCESS ? 1 : 0);
1013 if (is_c_interop != 1)
1015 /* Make personalized messages to give better feedback. */
1016 if (sym->ts.type == BT_DERIVED)
1017 gfc_error ("Variable '%s' at %L is a dummy argument to the "
1018 "BIND(C) procedure '%s' but is not C interoperable "
1019 "because derived type '%s' is not C interoperable",
1020 sym->name, &(sym->declared_at),
1021 sym->ns->proc_name->name,
1022 sym->ts.u.derived->name);
1023 else if (sym->ts.type == BT_CLASS)
1024 gfc_error ("Variable '%s' at %L is a dummy argument to the "
1025 "BIND(C) procedure '%s' but is not C interoperable "
1026 "because it is polymorphic",
1027 sym->name, &(sym->declared_at),
1028 sym->ns->proc_name->name);
1030 gfc_warning ("Variable '%s' at %L is a parameter to the "
1031 "BIND(C) procedure '%s' but may not be C "
1033 sym->name, &(sym->declared_at),
1034 sym->ns->proc_name->name);
1037 /* Character strings are only C interoperable if they have a
1039 if (sym->ts.type == BT_CHARACTER)
1041 gfc_charlen *cl = sym->ts.u.cl;
1042 if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT
1043 || mpz_cmp_si (cl->length->value.integer, 1) != 0)
1045 gfc_error ("Character argument '%s' at %L "
1046 "must be length 1 because "
1047 "procedure '%s' is BIND(C)",
1048 sym->name, &sym->declared_at,
1049 sym->ns->proc_name->name);
1054 /* We have to make sure that any param to a bind(c) routine does
1055 not have the allocatable, pointer, or optional attributes,
1056 according to J3/04-007, section 5.1. */
1057 if (sym->attr.allocatable == 1)
1059 gfc_error ("Variable '%s' at %L cannot have the "
1060 "ALLOCATABLE attribute because procedure '%s'"
1061 " is BIND(C)", sym->name, &(sym->declared_at),
1062 sym->ns->proc_name->name);
1066 if (sym->attr.pointer == 1)
1068 gfc_error ("Variable '%s' at %L cannot have the "
1069 "POINTER attribute because procedure '%s'"
1070 " is BIND(C)", sym->name, &(sym->declared_at),
1071 sym->ns->proc_name->name);
1075 if (sym->attr.optional == 1 && sym->attr.value)
1077 gfc_error ("Variable '%s' at %L cannot have both the OPTIONAL "
1078 "and the VALUE attribute because procedure '%s' "
1079 "is BIND(C)", sym->name, &(sym->declared_at),
1080 sym->ns->proc_name->name);
1083 else if (sym->attr.optional == 1
1084 && gfc_notify_std (GFC_STD_F2008_TS, "TS29113: Variable '%s' "
1085 "at %L with OPTIONAL attribute in "
1086 "procedure '%s' which is BIND(C)",
1087 sym->name, &(sym->declared_at),
1088 sym->ns->proc_name->name)
1092 /* Make sure that if it has the dimension attribute, that it is
1093 either assumed size or explicit shape. */
1094 if (sym->as != NULL)
1096 if (sym->as->type == AS_ASSUMED_SHAPE)
1098 gfc_error ("Assumed-shape array '%s' at %L cannot be an "
1099 "argument to the procedure '%s' at %L because "
1100 "the procedure is BIND(C)", sym->name,
1101 &(sym->declared_at), sym->ns->proc_name->name,
1102 &(sym->ns->proc_name->declared_at));
1106 if (sym->as->type == AS_DEFERRED)
1108 gfc_error ("Deferred-shape array '%s' at %L cannot be an "
1109 "argument to the procedure '%s' at %L because "
1110 "the procedure is BIND(C)", sym->name,
1111 &(sym->declared_at), sym->ns->proc_name->name,
1112 &(sym->ns->proc_name->declared_at));
1124 /* Function called by variable_decl() that adds a name to the symbol table. */
1127 build_sym (const char *name, gfc_charlen *cl, bool cl_deferred,
1128 gfc_array_spec **as, locus *var_locus)
1130 symbol_attribute attr;
1133 if (gfc_get_symbol (name, NULL, &sym))
1136 /* Start updating the symbol table. Add basic type attribute if present. */
1137 if (current_ts.type != BT_UNKNOWN
1138 && (sym->attr.implicit_type == 0
1139 || !gfc_compare_types (&sym->ts, ¤t_ts))
1140 && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE)
1143 if (sym->ts.type == BT_CHARACTER)
1146 sym->ts.deferred = cl_deferred;
1149 /* Add dimension attribute if present. */
1150 if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE)
1154 /* Add attribute to symbol. The copy is so that we can reset the
1155 dimension attribute. */
1156 attr = current_attr;
1158 attr.codimension = 0;
1160 if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE)
1163 /* Finish any work that may need to be done for the binding label,
1164 if it's a bind(c). The bind(c) attr is found before the symbol
1165 is made, and before the symbol name (for data decls), so the
1166 current_ts is holding the binding label, or nothing if the
1167 name= attr wasn't given. Therefore, test here if we're dealing
1168 with a bind(c) and make sure the binding label is set correctly. */
1169 if (sym->attr.is_bind_c == 1)
1171 if (!sym->binding_label)
1173 /* Set the binding label and verify that if a NAME= was specified
1174 then only one identifier was in the entity-decl-list. */
1175 if (set_binding_label (&sym->binding_label, sym->name,
1176 num_idents_on_line) == FAILURE)
1181 /* See if we know we're in a common block, and if it's a bind(c)
1182 common then we need to make sure we're an interoperable type. */
1183 if (sym->attr.in_common == 1)
1185 /* Test the common block object. */
1186 if (sym->common_block != NULL && sym->common_block->is_bind_c == 1
1187 && sym->ts.is_c_interop != 1)
1189 gfc_error_now ("Variable '%s' in common block '%s' at %C "
1190 "must be declared with a C interoperable "
1191 "kind since common block '%s' is BIND(C)",
1192 sym->name, sym->common_block->name,
1193 sym->common_block->name);
1198 sym->attr.implied_index = 0;
1200 if (sym->ts.type == BT_CLASS)
1201 return gfc_build_class_symbol (&sym->ts, &sym->attr, &sym->as, false);
1207 /* Set character constant to the given length. The constant will be padded or
1208 truncated. If we're inside an array constructor without a typespec, we
1209 additionally check that all elements have the same length; check_len -1
1210 means no checking. */
1213 gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len)
1218 gcc_assert (expr->expr_type == EXPR_CONSTANT);
1219 gcc_assert (expr->ts.type == BT_CHARACTER);
1221 slen = expr->value.character.length;
1224 s = gfc_get_wide_string (len + 1);
1225 memcpy (s, expr->value.character.string,
1226 MIN (len, slen) * sizeof (gfc_char_t));
1228 gfc_wide_memset (&s[slen], ' ', len - slen);
1230 if (gfc_option.warn_character_truncation && slen > len)
1231 gfc_warning_now ("CHARACTER expression at %L is being truncated "
1232 "(%d/%d)", &expr->where, slen, len);
1234 /* Apply the standard by 'hand' otherwise it gets cleared for
1236 if (check_len != -1 && slen != check_len
1237 && !(gfc_option.allow_std & GFC_STD_GNU))
1238 gfc_error_now ("The CHARACTER elements of the array constructor "
1239 "at %L must have the same length (%d/%d)",
1240 &expr->where, slen, check_len);
1243 free (expr->value.character.string);
1244 expr->value.character.string = s;
1245 expr->value.character.length = len;
1250 /* Function to create and update the enumerator history
1251 using the information passed as arguments.
1252 Pointer "max_enum" is also updated, to point to
1253 enum history node containing largest initializer.
1255 SYM points to the symbol node of enumerator.
1256 INIT points to its enumerator value. */
1259 create_enum_history (gfc_symbol *sym, gfc_expr *init)
1261 enumerator_history *new_enum_history;
1262 gcc_assert (sym != NULL && init != NULL);
1264 new_enum_history = XCNEW (enumerator_history);
1266 new_enum_history->sym = sym;
1267 new_enum_history->initializer = init;
1268 new_enum_history->next = NULL;
1270 if (enum_history == NULL)
1272 enum_history = new_enum_history;
1273 max_enum = enum_history;
1277 new_enum_history->next = enum_history;
1278 enum_history = new_enum_history;
1280 if (mpz_cmp (max_enum->initializer->value.integer,
1281 new_enum_history->initializer->value.integer) < 0)
1282 max_enum = new_enum_history;
1287 /* Function to free enum kind history. */
1290 gfc_free_enum_history (void)
1292 enumerator_history *current = enum_history;
1293 enumerator_history *next;
1295 while (current != NULL)
1297 next = current->next;
1302 enum_history = NULL;
1306 /* Function called by variable_decl() that adds an initialization
1307 expression to a symbol. */
1310 add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus)
1312 symbol_attribute attr;
1317 if (find_special (name, &sym, false))
1322 /* If this symbol is confirming an implicit parameter type,
1323 then an initialization expression is not allowed. */
1324 if (attr.flavor == FL_PARAMETER
1325 && sym->value != NULL
1328 gfc_error ("Initializer not allowed for PARAMETER '%s' at %C",
1335 /* An initializer is required for PARAMETER declarations. */
1336 if (attr.flavor == FL_PARAMETER)
1338 gfc_error ("PARAMETER at %L is missing an initializer", var_locus);
1344 /* If a variable appears in a DATA block, it cannot have an
1348 gfc_error ("Variable '%s' at %C with an initializer already "
1349 "appears in a DATA statement", sym->name);
1353 /* Check if the assignment can happen. This has to be put off
1354 until later for derived type variables and procedure pointers. */
1355 if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED
1356 && sym->ts.type != BT_CLASS && init->ts.type != BT_CLASS
1357 && !sym->attr.proc_pointer
1358 && gfc_check_assign_symbol (sym, init) == FAILURE)
1361 if (sym->ts.type == BT_CHARACTER && sym->ts.u.cl
1362 && init->ts.type == BT_CHARACTER)
1364 /* Update symbol character length according initializer. */
1365 if (gfc_check_assign_symbol (sym, init) == FAILURE)
1368 if (sym->ts.u.cl->length == NULL)
1371 /* If there are multiple CHARACTER variables declared on the
1372 same line, we don't want them to share the same length. */
1373 sym->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
1375 if (sym->attr.flavor == FL_PARAMETER)
1377 if (init->expr_type == EXPR_CONSTANT)
1379 clen = init->value.character.length;
1380 sym->ts.u.cl->length
1381 = gfc_get_int_expr (gfc_default_integer_kind,
1384 else if (init->expr_type == EXPR_ARRAY)
1387 c = gfc_constructor_first (init->value.constructor);
1388 clen = c->expr->value.character.length;
1389 sym->ts.u.cl->length
1390 = gfc_get_int_expr (gfc_default_integer_kind,
1393 else if (init->ts.u.cl && init->ts.u.cl->length)
1394 sym->ts.u.cl->length =
1395 gfc_copy_expr (sym->value->ts.u.cl->length);
1398 /* Update initializer character length according symbol. */
1399 else if (sym->ts.u.cl->length->expr_type == EXPR_CONSTANT)
1401 int len = mpz_get_si (sym->ts.u.cl->length->value.integer);
1403 if (init->expr_type == EXPR_CONSTANT)
1404 gfc_set_constant_character_len (len, init, -1);
1405 else if (init->expr_type == EXPR_ARRAY)
1409 /* Build a new charlen to prevent simplification from
1410 deleting the length before it is resolved. */
1411 init->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
1412 init->ts.u.cl->length = gfc_copy_expr (sym->ts.u.cl->length);
1414 for (c = gfc_constructor_first (init->value.constructor);
1415 c; c = gfc_constructor_next (c))
1416 gfc_set_constant_character_len (len, c->expr, -1);
1421 /* If sym is implied-shape, set its upper bounds from init. */
1422 if (sym->attr.flavor == FL_PARAMETER && sym->attr.dimension
1423 && sym->as->type == AS_IMPLIED_SHAPE)
1427 if (init->rank == 0)
1429 gfc_error ("Can't initialize implied-shape array at %L"
1430 " with scalar", &sym->declared_at);
1433 gcc_assert (sym->as->rank == init->rank);
1435 /* Shape should be present, we get an initialization expression. */
1436 gcc_assert (init->shape);
1438 for (dim = 0; dim < sym->as->rank; ++dim)
1444 lower = sym->as->lower[dim];
1445 if (lower->expr_type != EXPR_CONSTANT)
1447 gfc_error ("Non-constant lower bound in implied-shape"
1448 " declaration at %L", &lower->where);
1452 /* All dimensions must be without upper bound. */
1453 gcc_assert (!sym->as->upper[dim]);
1456 e = gfc_get_constant_expr (BT_INTEGER, k, &sym->declared_at);
1457 mpz_add (e->value.integer,
1458 lower->value.integer, init->shape[dim]);
1459 mpz_sub_ui (e->value.integer, e->value.integer, 1);
1460 sym->as->upper[dim] = e;
1463 sym->as->type = AS_EXPLICIT;
1466 /* Need to check if the expression we initialized this
1467 to was one of the iso_c_binding named constants. If so,
1468 and we're a parameter (constant), let it be iso_c.
1470 integer(c_int), parameter :: my_int = c_int
1471 integer(my_int) :: my_int_2
1472 If we mark my_int as iso_c (since we can see it's value
1473 is equal to one of the named constants), then my_int_2
1474 will be considered C interoperable. */
1475 if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED)
1477 sym->ts.is_iso_c |= init->ts.is_iso_c;
1478 sym->ts.is_c_interop |= init->ts.is_c_interop;
1479 /* attr bits needed for module files. */
1480 sym->attr.is_iso_c |= init->ts.is_iso_c;
1481 sym->attr.is_c_interop |= init->ts.is_c_interop;
1482 if (init->ts.is_iso_c)
1483 sym->ts.f90_type = init->ts.f90_type;
1486 /* Add initializer. Make sure we keep the ranks sane. */
1487 if (sym->attr.dimension && init->rank == 0)
1492 if (sym->attr.flavor == FL_PARAMETER
1493 && init->expr_type == EXPR_CONSTANT
1494 && spec_size (sym->as, &size) == SUCCESS
1495 && mpz_cmp_si (size, 0) > 0)
1497 array = gfc_get_array_expr (init->ts.type, init->ts.kind,
1499 for (n = 0; n < (int)mpz_get_si (size); n++)
1500 gfc_constructor_append_expr (&array->value.constructor,
1503 : gfc_copy_expr (init),
1506 array->shape = gfc_get_shape (sym->as->rank);
1507 for (n = 0; n < sym->as->rank; n++)
1508 spec_dimen_size (sym->as, n, &array->shape[n]);
1513 init->rank = sym->as->rank;
1517 if (sym->attr.save == SAVE_NONE)
1518 sym->attr.save = SAVE_IMPLICIT;
1526 /* Function called by variable_decl() that adds a name to a structure
1530 build_struct (const char *name, gfc_charlen *cl, gfc_expr **init,
1531 gfc_array_spec **as)
1534 gfc_try t = SUCCESS;
1536 /* F03:C438/C439. If the current symbol is of the same derived type that we're
1537 constructing, it must have the pointer attribute. */
1538 if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS)
1539 && current_ts.u.derived == gfc_current_block ()
1540 && current_attr.pointer == 0)
1542 gfc_error ("Component at %C must have the POINTER attribute");
1546 if (gfc_current_block ()->attr.pointer && (*as)->rank != 0)
1548 if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT)
1550 gfc_error ("Array component of structure at %C must have explicit "
1551 "or deferred shape");
1556 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
1560 if (c->ts.type == BT_CHARACTER)
1562 c->attr = current_attr;
1564 c->initializer = *init;
1571 c->attr.codimension = 1;
1573 c->attr.dimension = 1;
1577 /* Should this ever get more complicated, combine with similar section
1578 in add_init_expr_to_sym into a separate function. */
1579 if (c->ts.type == BT_CHARACTER && !c->attr.pointer && c->initializer
1581 && c->ts.u.cl->length && c->ts.u.cl->length->expr_type == EXPR_CONSTANT)
1585 gcc_assert (c->ts.u.cl && c->ts.u.cl->length);
1586 gcc_assert (c->ts.u.cl->length->expr_type == EXPR_CONSTANT);
1587 gcc_assert (c->ts.u.cl->length->ts.type == BT_INTEGER);
1589 len = mpz_get_si (c->ts.u.cl->length->value.integer);
1591 if (c->initializer->expr_type == EXPR_CONSTANT)
1592 gfc_set_constant_character_len (len, c->initializer, -1);
1593 else if (mpz_cmp (c->ts.u.cl->length->value.integer,
1594 c->initializer->ts.u.cl->length->value.integer))
1596 gfc_constructor *ctor;
1597 ctor = gfc_constructor_first (c->initializer->value.constructor);
1602 bool has_ts = (c->initializer->ts.u.cl
1603 && c->initializer->ts.u.cl->length_from_typespec);
1605 /* Remember the length of the first element for checking
1606 that all elements *in the constructor* have the same
1607 length. This need not be the length of the LHS! */
1608 gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT);
1609 gcc_assert (ctor->expr->ts.type == BT_CHARACTER);
1610 first_len = ctor->expr->value.character.length;
1612 for ( ; ctor; ctor = gfc_constructor_next (ctor))
1613 if (ctor->expr->expr_type == EXPR_CONSTANT)
1615 gfc_set_constant_character_len (len, ctor->expr,
1616 has_ts ? -1 : first_len);
1617 ctor->expr->ts.u.cl->length = gfc_copy_expr (c->ts.u.cl->length);
1623 /* Check array components. */
1624 if (!c->attr.dimension)
1627 if (c->attr.pointer)
1629 if (c->as->type != AS_DEFERRED)
1631 gfc_error ("Pointer array component of structure at %C must have a "
1636 else if (c->attr.allocatable)
1638 if (c->as->type != AS_DEFERRED)
1640 gfc_error ("Allocatable component of structure at %C must have a "
1647 if (c->as->type != AS_EXPLICIT)
1649 gfc_error ("Array component of structure at %C must have an "
1656 if (c->ts.type == BT_CLASS)
1658 bool delayed = (gfc_state_stack->sym == c->ts.u.derived)
1659 || (!c->ts.u.derived->components
1660 && !c->ts.u.derived->attr.zero_comp);
1661 return gfc_build_class_symbol (&c->ts, &c->attr, &c->as, delayed);
1668 /* Match a 'NULL()', and possibly take care of some side effects. */
1671 gfc_match_null (gfc_expr **result)
1676 m = gfc_match (" null ( )");
1680 /* The NULL symbol now has to be/become an intrinsic function. */
1681 if (gfc_get_symbol ("null", NULL, &sym))
1683 gfc_error ("NULL() initialization at %C is ambiguous");
1687 gfc_intrinsic_symbol (sym);
1689 if (sym->attr.proc != PROC_INTRINSIC
1690 && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC,
1691 sym->name, NULL) == FAILURE
1692 || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE))
1695 *result = gfc_get_null_expr (&gfc_current_locus);
1701 /* Match the initialization expr for a data pointer or procedure pointer. */
1704 match_pointer_init (gfc_expr **init, int procptr)
1708 if (gfc_pure (NULL) && gfc_state_stack->state != COMP_DERIVED)
1710 gfc_error ("Initialization of pointer at %C is not allowed in "
1711 "a PURE procedure");
1715 /* Match NULL() initilization. */
1716 m = gfc_match_null (init);
1720 /* Match non-NULL initialization. */
1721 gfc_matching_ptr_assignment = !procptr;
1722 gfc_matching_procptr_assignment = procptr;
1723 m = gfc_match_rvalue (init);
1724 gfc_matching_ptr_assignment = 0;
1725 gfc_matching_procptr_assignment = 0;
1726 if (m == MATCH_ERROR)
1728 else if (m == MATCH_NO)
1730 gfc_error ("Error in pointer initialization at %C");
1735 gfc_resolve_expr (*init);
1737 if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: non-NULL pointer "
1738 "initialization at %C") == FAILURE)
1746 check_function_name (char *name)
1748 /* In functions that have a RESULT variable defined, the function name always
1749 refers to function calls. Therefore, the name is not allowed to appear in
1750 specification statements. When checking this, be careful about
1751 'hidden' procedure pointer results ('ppr@'). */
1753 if (gfc_current_state () == COMP_FUNCTION)
1755 gfc_symbol *block = gfc_current_block ();
1756 if (block && block->result && block->result != block
1757 && strcmp (block->result->name, "ppr@") != 0
1758 && strcmp (block->name, name) == 0)
1760 gfc_error ("Function name '%s' not allowed at %C", name);
1769 /* Match a variable name with an optional initializer. When this
1770 subroutine is called, a variable is expected to be parsed next.
1771 Depending on what is happening at the moment, updates either the
1772 symbol table or the current interface. */
1775 variable_decl (int elem)
1777 char name[GFC_MAX_SYMBOL_LEN + 1];
1778 gfc_expr *initializer, *char_len;
1780 gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */
1792 /* When we get here, we've just matched a list of attributes and
1793 maybe a type and a double colon. The next thing we expect to see
1794 is the name of the symbol. */
1795 m = gfc_match_name (name);
1799 var_locus = gfc_current_locus;
1801 /* Now we could see the optional array spec. or character length. */
1802 m = gfc_match_array_spec (&as, true, true);
1803 if (m == MATCH_ERROR)
1807 as = gfc_copy_array_spec (current_as);
1808 else if (current_as)
1809 merge_array_spec (current_as, as, true);
1811 if (gfc_option.flag_cray_pointer)
1812 cp_as = gfc_copy_array_spec (as);
1814 /* At this point, we know for sure if the symbol is PARAMETER and can thus
1815 determine (and check) whether it can be implied-shape. If it
1816 was parsed as assumed-size, change it because PARAMETERs can not
1820 if (as->type == AS_IMPLIED_SHAPE && current_attr.flavor != FL_PARAMETER)
1823 gfc_error ("Non-PARAMETER symbol '%s' at %L can't be implied-shape",
1828 if (as->type == AS_ASSUMED_SIZE && as->rank == 1
1829 && current_attr.flavor == FL_PARAMETER)
1830 as->type = AS_IMPLIED_SHAPE;
1832 if (as->type == AS_IMPLIED_SHAPE
1833 && gfc_notify_std (GFC_STD_F2008,
1834 "Fortran 2008: Implied-shape array at %L",
1835 &var_locus) == FAILURE)
1844 cl_deferred = false;
1846 if (current_ts.type == BT_CHARACTER)
1848 switch (match_char_length (&char_len, &cl_deferred))
1851 cl = gfc_new_charlen (gfc_current_ns, NULL);
1853 cl->length = char_len;
1856 /* Non-constant lengths need to be copied after the first
1857 element. Also copy assumed lengths. */
1860 && (current_ts.u.cl->length == NULL
1861 || current_ts.u.cl->length->expr_type != EXPR_CONSTANT))
1863 cl = gfc_new_charlen (gfc_current_ns, NULL);
1864 cl->length = gfc_copy_expr (current_ts.u.cl->length);
1867 cl = current_ts.u.cl;
1869 cl_deferred = current_ts.deferred;
1878 /* If this symbol has already shown up in a Cray Pointer declaration,
1879 then we want to set the type & bail out. */
1880 if (gfc_option.flag_cray_pointer)
1882 gfc_find_symbol (name, gfc_current_ns, 1, &sym);
1883 if (sym != NULL && sym->attr.cray_pointee)
1885 sym->ts.type = current_ts.type;
1886 sym->ts.kind = current_ts.kind;
1888 sym->ts.u.derived = current_ts.u.derived;
1889 sym->ts.is_c_interop = current_ts.is_c_interop;
1890 sym->ts.is_iso_c = current_ts.is_iso_c;
1893 /* Check to see if we have an array specification. */
1896 if (sym->as != NULL)
1898 gfc_error ("Duplicate array spec for Cray pointee at %C");
1899 gfc_free_array_spec (cp_as);
1905 if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE)
1906 gfc_internal_error ("Couldn't set pointee array spec.");
1908 /* Fix the array spec. */
1909 m = gfc_mod_pointee_as (sym->as);
1910 if (m == MATCH_ERROR)
1918 gfc_free_array_spec (cp_as);
1922 /* Procedure pointer as function result. */
1923 if (gfc_current_state () == COMP_FUNCTION
1924 && strcmp ("ppr@", gfc_current_block ()->name) == 0
1925 && strcmp (name, gfc_current_block ()->ns->proc_name->name) == 0)
1926 strcpy (name, "ppr@");
1928 if (gfc_current_state () == COMP_FUNCTION
1929 && strcmp (name, gfc_current_block ()->name) == 0
1930 && gfc_current_block ()->result
1931 && strcmp ("ppr@", gfc_current_block ()->result->name) == 0)
1932 strcpy (name, "ppr@");
1934 /* OK, we've successfully matched the declaration. Now put the
1935 symbol in the current namespace, because it might be used in the
1936 optional initialization expression for this symbol, e.g. this is
1939 integer, parameter :: i = huge(i)
1941 This is only true for parameters or variables of a basic type.
1942 For components of derived types, it is not true, so we don't
1943 create a symbol for those yet. If we fail to create the symbol,
1945 if (gfc_current_state () != COMP_DERIVED
1946 && build_sym (name, cl, cl_deferred, &as, &var_locus) == FAILURE)
1952 /* An interface body specifies all of the procedure's
1953 characteristics and these shall be consistent with those
1954 specified in the procedure definition, except that the interface
1955 may specify a procedure that is not pure if the procedure is
1956 defined to be pure(12.3.2). */
1957 if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS)
1958 && gfc_current_ns->proc_name
1959 && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY
1960 && current_ts.u.derived->ns != gfc_current_ns)
1963 st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.u.derived->name);
1964 if (!(current_ts.u.derived->attr.imported
1966 && gfc_find_dt_in_generic (st->n.sym) == current_ts.u.derived)
1967 && !gfc_current_ns->has_import_set)
1969 gfc_error ("The type of '%s' at %C has not been declared within the "
1976 if (check_function_name (name) == FAILURE)
1982 /* We allow old-style initializations of the form
1983 integer i /2/, j(4) /3*3, 1/
1984 (if no colon has been seen). These are different from data
1985 statements in that initializers are only allowed to apply to the
1986 variable immediately preceding, i.e.
1988 is not allowed. Therefore we have to do some work manually, that
1989 could otherwise be left to the matchers for DATA statements. */
1991 if (!colon_seen && gfc_match (" /") == MATCH_YES)
1993 if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style "
1994 "initialization at %C") == FAILURE)
1997 return match_old_style_init (name);
2000 /* The double colon must be present in order to have initializers.
2001 Otherwise the statement is ambiguous with an assignment statement. */
2004 if (gfc_match (" =>") == MATCH_YES)
2006 if (!current_attr.pointer)
2008 gfc_error ("Initialization at %C isn't for a pointer variable");
2013 m = match_pointer_init (&initializer, 0);
2017 else if (gfc_match_char ('=') == MATCH_YES)
2019 if (current_attr.pointer)
2021 gfc_error ("Pointer initialization at %C requires '=>', "
2027 m = gfc_match_init_expr (&initializer);
2030 gfc_error ("Expected an initialization expression at %C");
2034 if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL)
2035 && gfc_state_stack->state != COMP_DERIVED)
2037 gfc_error ("Initialization of variable at %C is not allowed in "
2038 "a PURE procedure");
2047 if (initializer != NULL && current_attr.allocatable
2048 && gfc_current_state () == COMP_DERIVED)
2050 gfc_error ("Initialization of allocatable component at %C is not "
2056 /* Add the initializer. Note that it is fine if initializer is
2057 NULL here, because we sometimes also need to check if a
2058 declaration *must* have an initialization expression. */
2059 if (gfc_current_state () != COMP_DERIVED)
2060 t = add_init_expr_to_sym (name, &initializer, &var_locus);
2063 if (current_ts.type == BT_DERIVED
2064 && !current_attr.pointer && !initializer)
2065 initializer = gfc_default_initializer (¤t_ts);
2066 t = build_struct (name, cl, &initializer, &as);
2069 m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
2072 /* Free stuff up and return. */
2073 gfc_free_expr (initializer);
2074 gfc_free_array_spec (as);
2080 /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification.
2081 This assumes that the byte size is equal to the kind number for
2082 non-COMPLEX types, and equal to twice the kind number for COMPLEX. */
2085 gfc_match_old_kind_spec (gfc_typespec *ts)
2090 if (gfc_match_char ('*') != MATCH_YES)
2093 m = gfc_match_small_literal_int (&ts->kind, NULL);
2097 original_kind = ts->kind;
2099 /* Massage the kind numbers for complex types. */
2100 if (ts->type == BT_COMPLEX)
2104 gfc_error ("Old-style type declaration %s*%d not supported at %C",
2105 gfc_basic_typename (ts->type), original_kind);
2112 if (ts->type == BT_INTEGER && ts->kind == 4 && gfc_option.flag_integer4_kind == 8)
2115 if (ts->type == BT_REAL || ts->type == BT_COMPLEX)
2119 if (gfc_option.flag_real4_kind == 8)
2121 if (gfc_option.flag_real4_kind == 10)
2123 if (gfc_option.flag_real4_kind == 16)
2129 if (gfc_option.flag_real8_kind == 4)
2131 if (gfc_option.flag_real8_kind == 10)
2133 if (gfc_option.flag_real8_kind == 16)
2138 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
2140 gfc_error ("Old-style type declaration %s*%d not supported at %C",
2141 gfc_basic_typename (ts->type), original_kind);
2145 if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C",
2146 gfc_basic_typename (ts->type), original_kind) == FAILURE)
2153 /* Match a kind specification. Since kinds are generally optional, we
2154 usually return MATCH_NO if something goes wrong. If a "kind="
2155 string is found, then we know we have an error. */
2158 gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only)
2170 where = loc = gfc_current_locus;
2175 if (gfc_match_char ('(') == MATCH_NO)
2178 /* Also gobbles optional text. */
2179 if (gfc_match (" kind = ") == MATCH_YES)
2182 loc = gfc_current_locus;
2185 n = gfc_match_init_expr (&e);
2189 if (gfc_matching_function)
2191 /* The function kind expression might include use associated or
2192 imported parameters and try again after the specification
2194 if (gfc_match_char (')') != MATCH_YES)
2196 gfc_error ("Missing right parenthesis at %C");
2202 gfc_undo_symbols ();
2207 /* ....or else, the match is real. */
2209 gfc_error ("Expected initialization expression at %C");
2217 gfc_error ("Expected scalar initialization expression at %C");
2222 msg = gfc_extract_int (e, &ts->kind);
2231 /* Before throwing away the expression, let's see if we had a
2232 C interoperable kind (and store the fact). */
2233 if (e->ts.is_c_interop == 1)
2235 /* Mark this as c interoperable if being declared with one
2236 of the named constants from iso_c_binding. */
2237 ts->is_c_interop = e->ts.is_iso_c;
2238 ts->f90_type = e->ts.f90_type;
2244 /* Ignore errors to this point, if we've gotten here. This means
2245 we ignore the m=MATCH_ERROR from above. */
2246 if (gfc_validate_kind (ts->type, ts->kind, true) < 0)
2248 gfc_error ("Kind %d not supported for type %s at %C", ts->kind,
2249 gfc_basic_typename (ts->type));
2250 gfc_current_locus = where;
2254 /* Warn if, e.g., c_int is used for a REAL variable, but not
2255 if, e.g., c_double is used for COMPLEX as the standard
2256 explicitly says that the kind type parameter for complex and real
2257 variable is the same, i.e. c_float == c_float_complex. */
2258 if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type
2259 && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX)
2260 || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL)))
2261 gfc_warning_now ("C kind type parameter is for type %s but type at %L "
2262 "is %s", gfc_basic_typename (ts->f90_type), &where,
2263 gfc_basic_typename (ts->type));
2265 gfc_gobble_whitespace ();
2266 if ((c = gfc_next_ascii_char ()) != ')'
2267 && (ts->type != BT_CHARACTER || c != ','))
2269 if (ts->type == BT_CHARACTER)
2270 gfc_error ("Missing right parenthesis or comma at %C");
2272 gfc_error ("Missing right parenthesis at %C");
2276 /* All tests passed. */
2279 if(m == MATCH_ERROR)
2280 gfc_current_locus = where;
2282 if (ts->type == BT_INTEGER && ts->kind == 4 && gfc_option.flag_integer4_kind == 8)
2285 if (ts->type == BT_REAL || ts->type == BT_COMPLEX)
2289 if (gfc_option.flag_real4_kind == 8)
2291 if (gfc_option.flag_real4_kind == 10)
2293 if (gfc_option.flag_real4_kind == 16)
2299 if (gfc_option.flag_real8_kind == 4)
2301 if (gfc_option.flag_real8_kind == 10)
2303 if (gfc_option.flag_real8_kind == 16)
2308 /* Return what we know from the test(s). */
2313 gfc_current_locus = where;
2319 match_char_kind (int * kind, int * is_iso_c)
2328 where = gfc_current_locus;
2330 n = gfc_match_init_expr (&e);
2332 if (n != MATCH_YES && gfc_matching_function)
2334 /* The expression might include use-associated or imported
2335 parameters and try again after the specification
2338 gfc_undo_symbols ();
2343 gfc_error ("Expected initialization expression at %C");
2349 gfc_error ("Expected scalar initialization expression at %C");
2354 msg = gfc_extract_int (e, kind);
2355 *is_iso_c = e->ts.is_iso_c;
2365 /* Ignore errors to this point, if we've gotten here. This means
2366 we ignore the m=MATCH_ERROR from above. */
2367 if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0)
2369 gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind);
2373 /* All tests passed. */
2376 if (m == MATCH_ERROR)
2377 gfc_current_locus = where;
2379 /* Return what we know from the test(s). */
2384 gfc_current_locus = where;
2389 /* Match the various kind/length specifications in a CHARACTER
2390 declaration. We don't return MATCH_NO. */
2393 gfc_match_char_spec (gfc_typespec *ts)
2395 int kind, seen_length, is_iso_c;
2407 /* Try the old-style specification first. */
2408 old_char_selector = 0;
2410 m = match_char_length (&len, &deferred);
2414 old_char_selector = 1;
2419 m = gfc_match_char ('(');
2422 m = MATCH_YES; /* Character without length is a single char. */
2426 /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */
2427 if (gfc_match (" kind =") == MATCH_YES)
2429 m = match_char_kind (&kind, &is_iso_c);
2431 if (m == MATCH_ERROR)
2436 if (gfc_match (" , len =") == MATCH_NO)
2439 m = char_len_param_value (&len, &deferred);
2442 if (m == MATCH_ERROR)
2449 /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */
2450 if (gfc_match (" len =") == MATCH_YES)
2452 m = char_len_param_value (&len, &deferred);
2455 if (m == MATCH_ERROR)
2459 if (gfc_match_char (')') == MATCH_YES)
2462 if (gfc_match (" , kind =") != MATCH_YES)
2465 if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR)
2471 /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */
2472 m = char_len_param_value (&len, &deferred);
2475 if (m == MATCH_ERROR)
2479 m = gfc_match_char (')');
2483 if (gfc_match_char (',') != MATCH_YES)
2486 gfc_match (" kind ="); /* Gobble optional text. */
2488 m = match_char_kind (&kind, &is_iso_c);
2489 if (m == MATCH_ERROR)
2495 /* Require a right-paren at this point. */
2496 m = gfc_match_char (')');
2501 gfc_error ("Syntax error in CHARACTER declaration at %C");
2503 gfc_free_expr (len);
2507 /* Deal with character functions after USE and IMPORT statements. */
2508 if (gfc_matching_function)
2510 gfc_free_expr (len);
2511 gfc_undo_symbols ();
2517 gfc_free_expr (len);
2521 /* Do some final massaging of the length values. */
2522 cl = gfc_new_charlen (gfc_current_ns, NULL);
2524 if (seen_length == 0)
2525 cl->length = gfc_get_int_expr (gfc_default_integer_kind, NULL, 1);
2530 ts->kind = kind == 0 ? gfc_default_character_kind : kind;
2531 ts->deferred = deferred;
2533 /* We have to know if it was a c interoperable kind so we can
2534 do accurate type checking of bind(c) procs, etc. */
2536 /* Mark this as c interoperable if being declared with one
2537 of the named constants from iso_c_binding. */
2538 ts->is_c_interop = is_iso_c;
2539 else if (len != NULL)
2540 /* Here, we might have parsed something such as: character(c_char)
2541 In this case, the parsing code above grabs the c_char when
2542 looking for the length (line 1690, roughly). it's the last
2543 testcase for parsing the kind params of a character variable.
2544 However, it's not actually the length. this seems like it
2546 To see if the user used a C interop kind, test the expr
2547 of the so called length, and see if it's C interoperable. */
2548 ts->is_c_interop = len->ts.is_iso_c;
2554 /* Matches a declaration-type-spec (F03:R502). If successful, sets the ts
2555 structure to the matched specification. This is necessary for FUNCTION and
2556 IMPLICIT statements.
2558 If implicit_flag is nonzero, then we don't check for the optional
2559 kind specification. Not doing so is needed for matching an IMPLICIT
2560 statement correctly. */
2563 gfc_match_decl_type_spec (gfc_typespec *ts, int implicit_flag)
2565 char name[GFC_MAX_SYMBOL_LEN + 1];
2566 gfc_symbol *sym, *dt_sym;
2569 bool seen_deferred_kind, matched_type;
2570 const char *dt_name;
2572 /* A belt and braces check that the typespec is correctly being treated
2573 as a deferred characteristic association. */
2574 seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION)
2575 && (gfc_current_block ()->result->ts.kind == -1)
2576 && (ts->kind == -1);
2578 if (seen_deferred_kind)
2581 /* Clear the current binding label, in case one is given. */
2582 curr_binding_label = NULL;
2584 if (gfc_match (" byte") == MATCH_YES)
2586 if (gfc_notify_std (GFC_STD_GNU, "Extension: BYTE type at %C")
2590 if (gfc_validate_kind (BT_INTEGER, 1, true) < 0)
2592 gfc_error ("BYTE type used at %C "
2593 "is not available on the target machine");
2597 ts->type = BT_INTEGER;
2603 m = gfc_match (" type ( %n", name);
2604 matched_type = (m == MATCH_YES);
2606 if ((matched_type && strcmp ("integer", name) == 0)
2607 || (!matched_type && gfc_match (" integer") == MATCH_YES))
2609 ts->type = BT_INTEGER;
2610 ts->kind = gfc_default_integer_kind;
2614 if ((matched_type && strcmp ("character", name) == 0)
2615 || (!matched_type && gfc_match (" character") == MATCH_YES))
2618 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: TYPE with "
2619 "intrinsic-type-spec at %C") == FAILURE)
2622 ts->type = BT_CHARACTER;
2623 if (implicit_flag == 0)
2624 m = gfc_match_char_spec (ts);
2628 if (matched_type && m == MATCH_YES && gfc_match_char (')') != MATCH_YES)
2634 if ((matched_type && strcmp ("real", name) == 0)
2635 || (!matched_type && gfc_match (" real") == MATCH_YES))
2638 ts->kind = gfc_default_real_kind;
2643 && (strcmp ("doubleprecision", name) == 0
2644 || (strcmp ("double", name) == 0
2645 && gfc_match (" precision") == MATCH_YES)))
2646 || (!matched_type && gfc_match (" double precision") == MATCH_YES))
2649 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: TYPE with "
2650 "intrinsic-type-spec at %C") == FAILURE)
2652 if (matched_type && gfc_match_char (')') != MATCH_YES)
2656 ts->kind = gfc_default_double_kind;
2660 if ((matched_type && strcmp ("complex", name) == 0)
2661 || (!matched_type && gfc_match (" complex") == MATCH_YES))
2663 ts->type = BT_COMPLEX;
2664 ts->kind = gfc_default_complex_kind;
2669 && (strcmp ("doublecomplex", name) == 0
2670 || (strcmp ("double", name) == 0
2671 && gfc_match (" complex") == MATCH_YES)))
2672 || (!matched_type && gfc_match (" double complex") == MATCH_YES))
2674 if (gfc_notify_std (GFC_STD_GNU, "Extension: DOUBLE COMPLEX at %C")
2679 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: TYPE with "
2680 "intrinsic-type-spec at %C") == FAILURE)
2683 if (matched_type && gfc_match_char (')') != MATCH_YES)
2686 ts->type = BT_COMPLEX;
2687 ts->kind = gfc_default_double_kind;
2691 if ((matched_type && strcmp ("logical", name) == 0)
2692 || (!matched_type && gfc_match (" logical") == MATCH_YES))
2694 ts->type = BT_LOGICAL;
2695 ts->kind = gfc_default_logical_kind;
2700 m = gfc_match_char (')');
2703 ts->type = BT_DERIVED;
2706 /* Match CLASS declarations. */
2707 m = gfc_match (" class ( * )");
2708 if (m == MATCH_ERROR)
2710 else if (m == MATCH_YES)
2712 gfc_fatal_error ("Unlimited polymorphism at %C not yet supported");
2716 m = gfc_match (" class ( %n )", name);
2719 ts->type = BT_CLASS;
2721 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: CLASS statement at %C")
2726 /* Defer association of the derived type until the end of the
2727 specification block. However, if the derived type can be
2728 found, add it to the typespec. */
2729 if (gfc_matching_function)
2731 ts->u.derived = NULL;
2732 if (gfc_current_state () != COMP_INTERFACE
2733 && !gfc_find_symbol (name, NULL, 1, &sym) && sym)
2735 sym = gfc_find_dt_in_generic (sym);
2736 ts->u.derived = sym;
2741 /* Search for the name but allow the components to be defined later. If
2742 type = -1, this typespec has been seen in a function declaration but
2743 the type could not be accessed at that point. The actual derived type is
2744 stored in a symtree with the first letter of the name captialized; the
2745 symtree with the all lower-case name contains the associated
2746 generic function. */
2747 dt_name = gfc_get_string ("%c%s",
2748 (char) TOUPPER ((unsigned char) name[0]),
2749 (const char*)&name[1]);
2754 gfc_get_ha_symbol (name, &sym);
2755 if (sym->generic && gfc_find_symbol (dt_name, NULL, 0, &dt_sym))
2757 gfc_error ("Type name '%s' at %C is ambiguous", name);
2760 if (sym->generic && !dt_sym)
2761 dt_sym = gfc_find_dt_in_generic (sym);
2763 else if (ts->kind == -1)
2765 int iface = gfc_state_stack->previous->state != COMP_INTERFACE
2766 || gfc_current_ns->has_import_set;
2767 gfc_find_symbol (name, NULL, iface, &sym);
2768 if (sym && sym->generic && gfc_find_symbol (dt_name, NULL, 1, &dt_sym))
2770 gfc_error ("Type name '%s' at %C is ambiguous", name);
2773 if (sym && sym->generic && !dt_sym)
2774 dt_sym = gfc_find_dt_in_generic (sym);
2781 if ((sym->attr.flavor != FL_UNKNOWN
2782 && !(sym->attr.flavor == FL_PROCEDURE && sym->attr.generic))
2783 || sym->attr.subroutine)
2785 gfc_error ("Type name '%s' at %C conflicts with previously declared "
2786 "entity at %L, which has the same name", name,
2791 gfc_set_sym_referenced (sym);
2792 if (!sym->attr.generic
2793 && gfc_add_generic (&sym->attr, sym->name, NULL) == FAILURE)
2796 if (!sym->attr.function
2797 && gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)
2802 gfc_interface *intr, *head;
2804 /* Use upper case to save the actual derived-type symbol. */
2805 gfc_get_symbol (dt_name, NULL, &dt_sym);
2806 dt_sym->name = gfc_get_string (sym->name);
2807 head = sym->generic;
2808 intr = gfc_get_interface ();
2810 intr->where = gfc_current_locus;
2812 sym->generic = intr;
2813 sym->attr.if_source = IFSRC_DECL;
2816 gfc_set_sym_referenced (dt_sym);
2818 if (dt_sym->attr.flavor != FL_DERIVED
2819 && gfc_add_flavor (&dt_sym->attr, FL_DERIVED, sym->name, NULL)
2823 ts->u.derived = dt_sym;
2829 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: TYPE with "
2830 "intrinsic-type-spec at %C") == FAILURE)
2833 /* For all types except double, derived and character, look for an
2834 optional kind specifier. MATCH_NO is actually OK at this point. */
2835 if (implicit_flag == 1)
2837 if (matched_type && gfc_match_char (')') != MATCH_YES)
2843 if (gfc_current_form == FORM_FREE)
2845 c = gfc_peek_ascii_char ();
2846 if (!gfc_is_whitespace (c) && c != '*' && c != '('
2847 && c != ':' && c != ',')
2849 if (matched_type && c == ')')
2851 gfc_next_ascii_char ();
2858 m = gfc_match_kind_spec (ts, false);
2859 if (m == MATCH_NO && ts->type != BT_CHARACTER)
2860 m = gfc_match_old_kind_spec (ts);
2862 if (matched_type && gfc_match_char (')') != MATCH_YES)
2865 /* Defer association of the KIND expression of function results
2866 until after USE and IMPORT statements. */
2867 if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ())
2868 || gfc_matching_function)
2872 m = MATCH_YES; /* No kind specifier found. */
2878 /* Match an IMPLICIT NONE statement. Actually, this statement is
2879 already matched in parse.c, or we would not end up here in the
2880 first place. So the only thing we need to check, is if there is
2881 trailing garbage. If not, the match is successful. */
2884 gfc_match_implicit_none (void)
2886 return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO;
2890 /* Match the letter range(s) of an IMPLICIT statement. */
2893 match_implicit_range (void)
2899 cur_loc = gfc_current_locus;
2901 gfc_gobble_whitespace ();
2902 c = gfc_next_ascii_char ();
2905 gfc_error ("Missing character range in IMPLICIT at %C");
2912 gfc_gobble_whitespace ();
2913 c1 = gfc_next_ascii_char ();
2917 gfc_gobble_whitespace ();
2918 c = gfc_next_ascii_char ();
2923 inner = 0; /* Fall through. */
2930 gfc_gobble_whitespace ();
2931 c2 = gfc_next_ascii_char ();
2935 gfc_gobble_whitespace ();
2936 c = gfc_next_ascii_char ();
2938 if ((c != ',') && (c != ')'))
2951 gfc_error ("Letters must be in alphabetic order in "
2952 "IMPLICIT statement at %C");
2956 /* See if we can add the newly matched range to the pending
2957 implicits from this IMPLICIT statement. We do not check for
2958 conflicts with whatever earlier IMPLICIT statements may have
2959 set. This is done when we've successfully finished matching
2961 if (gfc_add_new_implicit_range (c1, c2) != SUCCESS)
2968 gfc_syntax_error (ST_IMPLICIT);
2970 gfc_current_locus = cur_loc;
2975 /* Match an IMPLICIT statement, storing the types for
2976 gfc_set_implicit() if the statement is accepted by the parser.
2977 There is a strange looking, but legal syntactic construction
2978 possible. It looks like:
2980 IMPLICIT INTEGER (a-b) (c-d)
2982 This is legal if "a-b" is a constant expression that happens to
2983 equal one of the legal kinds for integers. The real problem
2984 happens with an implicit specification that looks like:
2986 IMPLICIT INTEGER (a-b)
2988 In this case, a typespec matcher that is "greedy" (as most of the
2989 matchers are) gobbles the character range as a kindspec, leaving
2990 nothing left. We therefore have to go a bit more slowly in the
2991 matching process by inhibiting the kindspec checking during
2992 typespec matching and checking for a kind later. */
2995 gfc_match_implicit (void)
3004 /* We don't allow empty implicit statements. */
3005 if (gfc_match_eos () == MATCH_YES)
3007 gfc_error ("Empty IMPLICIT statement at %C");
3013 /* First cleanup. */
3014 gfc_clear_new_implicit ();
3016 /* A basic type is mandatory here. */
3017 m = gfc_match_decl_type_spec (&ts, 1);
3018 if (m == MATCH_ERROR)
3023 cur_loc = gfc_current_locus;
3024 m = match_implicit_range ();
3028 /* We may have <TYPE> (<RANGE>). */
3029 gfc_gobble_whitespace ();
3030 c = gfc_next_ascii_char ();
3031 if ((c == '\n') || (c == ','))
3033 /* Check for CHARACTER with no length parameter. */
3034 if (ts.type == BT_CHARACTER && !ts.u.cl)
3036 ts.kind = gfc_default_character_kind;
3037 ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
3038 ts.u.cl->length = gfc_get_int_expr (gfc_default_integer_kind,
3042 /* Record the Successful match. */
3043 if (gfc_merge_new_implicit (&ts) != SUCCESS)
3048 gfc_current_locus = cur_loc;
3051 /* Discard the (incorrectly) matched range. */
3052 gfc_clear_new_implicit ();
3054 /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */
3055 if (ts.type == BT_CHARACTER)
3056 m = gfc_match_char_spec (&ts);
3059 m = gfc_match_kind_spec (&ts, false);
3062 m = gfc_match_old_kind_spec (&ts);
3063 if (m == MATCH_ERROR)
3069 if (m == MATCH_ERROR)
3072 m = match_implicit_range ();
3073 if (m == MATCH_ERROR)
3078 gfc_gobble_whitespace ();
3079 c = gfc_next_ascii_char ();
3080 if ((c != '\n') && (c != ','))
3083 if (gfc_merge_new_implicit (&ts) != SUCCESS)
3091 gfc_syntax_error (ST_IMPLICIT);
3099 gfc_match_import (void)
3101 char name[GFC_MAX_SYMBOL_LEN + 1];
3106 if (gfc_current_ns->proc_name == NULL
3107 || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY)
3109 gfc_error ("IMPORT statement at %C only permitted in "
3110 "an INTERFACE body");
3114 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C")
3118 if (gfc_match_eos () == MATCH_YES)
3120 /* All host variables should be imported. */
3121 gfc_current_ns->has_import_set = 1;
3125 if (gfc_match (" ::") == MATCH_YES)
3127 if (gfc_match_eos () == MATCH_YES)
3129 gfc_error ("Expecting list of named entities at %C");
3137 m = gfc_match (" %n", name);
3141 if (gfc_current_ns->parent != NULL
3142 && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym))
3144 gfc_error ("Type name '%s' at %C is ambiguous", name);
3147 else if (!sym && gfc_current_ns->proc_name->ns->parent != NULL
3148 && gfc_find_symbol (name,
3149 gfc_current_ns->proc_name->ns->parent,
3152 gfc_error ("Type name '%s' at %C is ambiguous", name);
3158 gfc_error ("Cannot IMPORT '%s' from host scoping unit "
3159 "at %C - does not exist.", name);
3163 if (gfc_find_symtree (gfc_current_ns->sym_root,name))
3165 gfc_warning ("'%s' is already IMPORTed from host scoping unit "
3170 st = gfc_new_symtree (&gfc_current_ns->sym_root, sym->name);
3173 sym->attr.imported = 1;
3175 if (sym->attr.generic && (sym = gfc_find_dt_in_generic (sym)))
3177 /* The actual derived type is stored in a symtree with the first
3178 letter of the name captialized; the symtree with the all
3179 lower-case name contains the associated generic function. */
3180 st = gfc_new_symtree (&gfc_current_ns->sym_root,
3181 gfc_get_string ("%c%s",
3182 (char) TOUPPER ((unsigned char) sym->name[0]),
3186 sym->attr.imported = 1;
3199 if (gfc_match_eos () == MATCH_YES)
3201 if (gfc_match_char (',') != MATCH_YES)
3208 gfc_error ("Syntax error in IMPORT statement at %C");
3213 /* A minimal implementation of gfc_match without whitespace, escape
3214 characters or variable arguments. Returns true if the next
3215 characters match the TARGET template exactly. */
3218 match_string_p (const char *target)
3222 for (p = target; *p; p++)
3223 if ((char) gfc_next_ascii_char () != *p)
3228 /* Matches an attribute specification including array specs. If
3229 successful, leaves the variables current_attr and current_as
3230 holding the specification. Also sets the colon_seen variable for
3231 later use by matchers associated with initializations.
3233 This subroutine is a little tricky in the sense that we don't know
3234 if we really have an attr-spec until we hit the double colon.
3235 Until that time, we can only return MATCH_NO. This forces us to
3236 check for duplicate specification at this level. */
3239 match_attr_spec (void)
3241 /* Modifiers that can exist in a type statement. */
3243 { GFC_DECL_BEGIN = 0,
3244 DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL,
3245 DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL,
3246 DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE,
3247 DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE,
3248 DECL_IS_BIND_C, DECL_CODIMENSION, DECL_ASYNCHRONOUS, DECL_CONTIGUOUS,
3249 DECL_NONE, GFC_DECL_END /* Sentinel */
3253 /* GFC_DECL_END is the sentinel, index starts at 0. */
3254 #define NUM_DECL GFC_DECL_END
3256 locus start, seen_at[NUM_DECL];
3263 gfc_clear_attr (¤t_attr);
3264 start = gfc_current_locus;
3269 /* See if we get all of the keywords up to the final double colon. */
3270 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3278 gfc_gobble_whitespace ();
3280 ch = gfc_next_ascii_char ();
3283 /* This is the successful exit condition for the loop. */
3284 if (gfc_next_ascii_char () == ':')
3289 gfc_gobble_whitespace ();
3290 switch (gfc_peek_ascii_char ())
3293 gfc_next_ascii_char ();
3294 switch (gfc_next_ascii_char ())
3297 if (match_string_p ("locatable"))
3299 /* Matched "allocatable". */
3300 d = DECL_ALLOCATABLE;
3305 if (match_string_p ("ynchronous"))
3307 /* Matched "asynchronous". */
3308 d = DECL_ASYNCHRONOUS;
3315 /* Try and match the bind(c). */
3316 m = gfc_match_bind_c (NULL, true);
3319 else if (m == MATCH_ERROR)
3324 gfc_next_ascii_char ();
3325 if ('o' != gfc_next_ascii_char ())
3327 switch (gfc_next_ascii_char ())
3330 if (match_string_p ("imension"))
3332 d = DECL_CODIMENSION;
3336 if (match_string_p ("tiguous"))
3338 d = DECL_CONTIGUOUS;
3345 if (match_string_p ("dimension"))
3350 if (match_string_p ("external"))
3355 if (match_string_p ("int"))
3357 ch = gfc_next_ascii_char ();
3360 if (match_string_p ("nt"))
3362 /* Matched "intent". */
3363 /* TODO: Call match_intent_spec from here. */
3364 if (gfc_match (" ( in out )") == MATCH_YES)
3366 else if (gfc_match (" ( in )") == MATCH_YES)
3368 else if (gfc_match (" ( out )") == MATCH_YES)
3374 if (match_string_p ("insic"))
3376 /* Matched "intrinsic". */
3384 if (match_string_p ("optional"))
3389 gfc_next_ascii_char ();
3390 switch (gfc_next_ascii_char ())
3393 if (match_string_p ("rameter"))
3395 /* Matched "parameter". */
3401 if (match_string_p ("inter"))
3403 /* Matched "pointer". */
3409 ch = gfc_next_ascii_char ();
3412 if (match_string_p ("vate"))
3414 /* Matched "private". */
3420 if (match_string_p ("tected"))
3422 /* Matched "protected". */
3429 if (match_string_p ("blic"))
3431 /* Matched "public". */
3439 if (match_string_p ("save"))
3444 if (match_string_p ("target"))
3449 gfc_next_ascii_char ();
3450 ch = gfc_next_ascii_char ();
3453 if (match_string_p ("lue"))
3455 /* Matched "value". */
3461 if (match_string_p ("latile"))
3463 /* Matched "volatile". */
3471 /* No double colon and no recognizable decl_type, so assume that
3472 we've been looking at something else the whole time. */
3479 /* Check to make sure any parens are paired up correctly. */
3480 if (gfc_match_parens () == MATCH_ERROR)
3487 seen_at[d] = gfc_current_locus;
3489 if (d == DECL_DIMENSION || d == DECL_CODIMENSION)
3491 gfc_array_spec *as = NULL;
3493 m = gfc_match_array_spec (&as, d == DECL_DIMENSION,
3494 d == DECL_CODIMENSION);
3496 if (current_as == NULL)
3498 else if (m == MATCH_YES)
3500 merge_array_spec (as, current_as, false);
3506 if (d == DECL_CODIMENSION)
3507 gfc_error ("Missing codimension specification at %C");
3509 gfc_error ("Missing dimension specification at %C");
3513 if (m == MATCH_ERROR)
3518 /* Since we've seen a double colon, we have to be looking at an
3519 attr-spec. This means that we can now issue errors. */
3520 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3525 case DECL_ALLOCATABLE:
3526 attr = "ALLOCATABLE";
3528 case DECL_ASYNCHRONOUS:
3529 attr = "ASYNCHRONOUS";
3531 case DECL_CODIMENSION:
3532 attr = "CODIMENSION";
3534 case DECL_CONTIGUOUS:
3535 attr = "CONTIGUOUS";
3537 case DECL_DIMENSION:
3544 attr = "INTENT (IN)";
3547 attr = "INTENT (OUT)";
3550 attr = "INTENT (IN OUT)";
3552 case DECL_INTRINSIC:
3558 case DECL_PARAMETER:
3564 case DECL_PROTECTED:
3579 case DECL_IS_BIND_C:
3589 attr = NULL; /* This shouldn't happen. */
3592 gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]);
3597 /* Now that we've dealt with duplicate attributes, add the attributes
3598 to the current attribute. */
3599 for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++)
3604 if (gfc_current_state () == COMP_DERIVED
3605 && d != DECL_DIMENSION && d != DECL_CODIMENSION
3606 && d != DECL_POINTER && d != DECL_PRIVATE
3607 && d != DECL_PUBLIC && d != DECL_CONTIGUOUS && d != DECL_NONE)
3609 if (d == DECL_ALLOCATABLE)
3611 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE "
3612 "attribute at %C in a TYPE definition")
3621 gfc_error ("Attribute at %L is not allowed in a TYPE definition",
3628 if ((d == DECL_PRIVATE || d == DECL_PUBLIC)
3629 && gfc_current_state () != COMP_MODULE)
3631 if (d == DECL_PRIVATE)
3635 if (gfc_current_state () == COMP_DERIVED
3636 && gfc_state_stack->previous
3637 && gfc_state_stack->previous->state == COMP_MODULE)
3639 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s "
3640 "at %L in a TYPE definition", attr,
3650 gfc_error ("%s attribute at %L is not allowed outside of the "
3651 "specification part of a module", attr, &seen_at[d]);
3659 case DECL_ALLOCATABLE:
3660 t = gfc_add_allocatable (¤t_attr, &seen_at[d]);
3663 case DECL_ASYNCHRONOUS:
3664 if (gfc_notify_std (GFC_STD_F2003,
3665 "Fortran 2003: ASYNCHRONOUS attribute at %C")
3669 t = gfc_add_asynchronous (¤t_attr, NULL, &seen_at[d]);
3672 case DECL_CODIMENSION:
3673 t = gfc_add_codimension (¤t_attr, NULL, &seen_at[d]);
3676 case DECL_CONTIGUOUS:
3677 if (gfc_notify_std (GFC_STD_F2008,
3678 "Fortran 2008: CONTIGUOUS attribute at %C")
3682 t = gfc_add_contiguous (¤t_attr, NULL, &seen_at[d]);
3685 case DECL_DIMENSION:
3686 t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]);
3690 t = gfc_add_external (¤t_attr, &seen_at[d]);
3694 t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]);
3698 t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]);
3702 t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]);
3705 case DECL_INTRINSIC:
3706 t = gfc_add_intrinsic (¤t_attr, &seen_at[d]);
3710 t = gfc_add_optional (¤t_attr, &seen_at[d]);
3713 case DECL_PARAMETER:
3714 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]);
3718 t = gfc_add_pointer (¤t_attr, &seen_at[d]);
3721 case DECL_PROTECTED:
3722 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
3724 gfc_error ("PROTECTED at %C only allowed in specification "
3725 "part of a module");
3730 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED "
3735 t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]);
3739 t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL,
3744 t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL,
3749 t = gfc_add_save (¤t_attr, SAVE_EXPLICIT, NULL, &seen_at[d]);
3753 t = gfc_add_target (¤t_attr, &seen_at[d]);
3756 case DECL_IS_BIND_C:
3757 t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0);
3761 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute "
3766 t = gfc_add_value (¤t_attr, NULL, &seen_at[d]);
3770 if (gfc_notify_std (GFC_STD_F2003,
3771 "Fortran 2003: VOLATILE attribute at %C")
3775 t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]);
3779 gfc_internal_error ("match_attr_spec(): Bad attribute");
3789 /* Since Fortran 2008 module variables implicitly have the SAVE attribute. */
3790 if (gfc_current_state () == COMP_MODULE && !current_attr.save
3791 && (gfc_option.allow_std & GFC_STD_F2008) != 0)
3792 current_attr.save = SAVE_IMPLICIT;
3798 gfc_current_locus = start;
3799 gfc_free_array_spec (current_as);
3805 /* Set the binding label, dest_label, either with the binding label
3806 stored in the given gfc_typespec, ts, or if none was provided, it
3807 will be the symbol name in all lower case, as required by the draft
3808 (J3/04-007, section 15.4.1). If a binding label was given and
3809 there is more than one argument (num_idents), it is an error. */
3812 set_binding_label (const char **dest_label, const char *sym_name,
3815 if (num_idents > 1 && has_name_equals)
3817 gfc_error ("Multiple identifiers provided with "
3818 "single NAME= specifier at %C");
3822 if (curr_binding_label)
3823 /* Binding label given; store in temp holder til have sym. */
3824 *dest_label = curr_binding_label;
3827 /* No binding label given, and the NAME= specifier did not exist,
3828 which means there was no NAME="". */
3829 if (sym_name != NULL && has_name_equals == 0)
3830 *dest_label = IDENTIFIER_POINTER (get_identifier (sym_name));
3837 /* Set the status of the given common block as being BIND(C) or not,
3838 depending on the given parameter, is_bind_c. */
3841 set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c)
3843 com_block->is_bind_c = is_bind_c;
3848 /* Verify that the given gfc_typespec is for a C interoperable type. */
3851 gfc_verify_c_interop (gfc_typespec *ts)
3853 if (ts->type == BT_DERIVED && ts->u.derived != NULL)
3854 return (ts->u.derived->ts.is_c_interop || ts->u.derived->attr.is_bind_c)
3855 ? SUCCESS : FAILURE;
3856 else if (ts->type == BT_CLASS)
3858 else if (ts->is_c_interop != 1)
3865 /* Verify that the variables of a given common block, which has been
3866 defined with the attribute specifier bind(c), to be of a C
3867 interoperable type. Errors will be reported here, if
3871 verify_com_block_vars_c_interop (gfc_common_head *com_block)
3873 gfc_symbol *curr_sym = NULL;
3874 gfc_try retval = SUCCESS;
3876 curr_sym = com_block->head;
3878 /* Make sure we have at least one symbol. */
3879 if (curr_sym == NULL)
3882 /* Here we know we have a symbol, so we'll execute this loop
3886 /* The second to last param, 1, says this is in a common block. */
3887 retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block);
3888 curr_sym = curr_sym->common_next;
3889 } while (curr_sym != NULL);
3895 /* Verify that a given BIND(C) symbol is C interoperable. If it is not,
3896 an appropriate error message is reported. */
3899 verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts,
3900 int is_in_common, gfc_common_head *com_block)
3902 bool bind_c_function = false;
3903 gfc_try retval = SUCCESS;
3905 if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c)
3906 bind_c_function = true;
3908 if (tmp_sym->attr.function && tmp_sym->result != NULL)
3910 tmp_sym = tmp_sym->result;
3911 /* Make sure it wasn't an implicitly typed result. */
3912 if (tmp_sym->attr.implicit_type)
3914 gfc_warning ("Implicitly declared BIND(C) function '%s' at "
3915 "%L may not be C interoperable", tmp_sym->name,
3916 &tmp_sym->declared_at);
3917 tmp_sym->ts.f90_type = tmp_sym->ts.type;
3918 /* Mark it as C interoperable to prevent duplicate warnings. */
3919 tmp_sym->ts.is_c_interop = 1;
3920 tmp_sym->attr.is_c_interop = 1;
3924 /* Here, we know we have the bind(c) attribute, so if we have
3925 enough type info, then verify that it's a C interop kind.
3926 The info could be in the symbol already, or possibly still in
3927 the given ts (current_ts), so look in both. */
3928 if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN)
3930 if (gfc_verify_c_interop (&(tmp_sym->ts)) != SUCCESS)
3932 /* See if we're dealing with a sym in a common block or not. */
3933 if (is_in_common == 1)
3935 gfc_warning ("Variable '%s' in common block '%s' at %L "
3936 "may not be a C interoperable "
3937 "kind though common block '%s' is BIND(C)",
3938 tmp_sym->name, com_block->name,
3939 &(tmp_sym->declared_at), com_block->name);
3943 if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED)
3944 gfc_error ("Type declaration '%s' at %L is not C "
3945 "interoperable but it is BIND(C)",
3946 tmp_sym->name, &(tmp_sym->declared_at));
3948 gfc_warning ("Variable '%s' at %L "
3949 "may not be a C interoperable "
3950 "kind but it is bind(c)",
3951 tmp_sym->name, &(tmp_sym->declared_at));
3955 /* Variables declared w/in a common block can't be bind(c)
3956 since there's no way for C to see these variables, so there's
3957 semantically no reason for the attribute. */
3958 if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1)
3960 gfc_error ("Variable '%s' in common block '%s' at "
3961 "%L cannot be declared with BIND(C) "
3962 "since it is not a global",
3963 tmp_sym->name, com_block->name,
3964 &(tmp_sym->declared_at));
3968 /* Scalar variables that are bind(c) can not have the pointer
3969 or allocatable attributes. */
3970 if (tmp_sym->attr.is_bind_c == 1)
3972 if (tmp_sym->attr.pointer == 1)
3974 gfc_error ("Variable '%s' at %L cannot have both the "
3975 "POINTER and BIND(C) attributes",
3976 tmp_sym->name, &(tmp_sym->declared_at));
3980 if (tmp_sym->attr.allocatable == 1)
3982 gfc_error ("Variable '%s' at %L cannot have both the "
3983 "ALLOCATABLE and BIND(C) attributes",
3984 tmp_sym->name, &(tmp_sym->declared_at));
3990 /* If it is a BIND(C) function, make sure the return value is a
3991 scalar value. The previous tests in this function made sure
3992 the type is interoperable. */
3993 if (bind_c_function && tmp_sym->as != NULL)
3994 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
3995 "be an array", tmp_sym->name, &(tmp_sym->declared_at));
3997 /* BIND(C) functions can not return a character string. */
3998 if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER)
3999 if (tmp_sym->ts.u.cl == NULL || tmp_sym->ts.u.cl->length == NULL
4000 || tmp_sym->ts.u.cl->length->expr_type != EXPR_CONSTANT
4001 || mpz_cmp_si (tmp_sym->ts.u.cl->length->value.integer, 1) != 0)
4002 gfc_error ("Return type of BIND(C) function '%s' at %L cannot "
4003 "be a character string", tmp_sym->name,
4004 &(tmp_sym->declared_at));
4007 /* See if the symbol has been marked as private. If it has, make sure
4008 there is no binding label and warn the user if there is one. */
4009 if (tmp_sym->attr.access == ACCESS_PRIVATE
4010 && tmp_sym->binding_label)
4011 /* Use gfc_warning_now because we won't say that the symbol fails
4012 just because of this. */
4013 gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been "
4014 "given the binding label '%s'", tmp_sym->name,
4015 &(tmp_sym->declared_at), tmp_sym->binding_label);
4021 /* Set the appropriate fields for a symbol that's been declared as
4022 BIND(C) (the is_bind_c flag and the binding label), and verify that
4023 the type is C interoperable. Errors are reported by the functions
4024 used to set/test these fields. */
4027 set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents)
4029 gfc_try retval = SUCCESS;
4031 /* TODO: Do we need to make sure the vars aren't marked private? */
4033 /* Set the is_bind_c bit in symbol_attribute. */
4034 gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0);
4036 if (set_binding_label (&tmp_sym->binding_label, tmp_sym->name,
4037 num_idents) != SUCCESS)
4044 /* Set the fields marking the given common block as BIND(C), including
4045 a binding label, and report any errors encountered. */
4048 set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents)
4050 gfc_try retval = SUCCESS;
4052 /* destLabel, common name, typespec (which may have binding label). */
4053 if (set_binding_label (&com_block->binding_label, com_block->name,
4058 /* Set the given common block (com_block) to being bind(c) (1). */
4059 set_com_block_bind_c (com_block, 1);
4065 /* Retrieve the list of one or more identifiers that the given bind(c)
4066 attribute applies to. */
4069 get_bind_c_idents (void)
4071 char name[GFC_MAX_SYMBOL_LEN + 1];
4073 gfc_symbol *tmp_sym = NULL;
4075 gfc_common_head *com_block = NULL;
4077 if (gfc_match_name (name) == MATCH_YES)
4079 found_id = MATCH_YES;
4080 gfc_get_ha_symbol (name, &tmp_sym);
4082 else if (match_common_name (name) == MATCH_YES)
4084 found_id = MATCH_YES;
4085 com_block = gfc_get_common (name, 0);
4089 gfc_error ("Need either entity or common block name for "
4090 "attribute specification statement at %C");
4094 /* Save the current identifier and look for more. */
4097 /* Increment the number of identifiers found for this spec stmt. */
4100 /* Make sure we have a sym or com block, and verify that it can
4101 be bind(c). Set the appropriate field(s) and look for more
4103 if (tmp_sym != NULL || com_block != NULL)
4105 if (tmp_sym != NULL)
4107 if (set_verify_bind_c_sym (tmp_sym, num_idents)
4113 if (set_verify_bind_c_com_block(com_block, num_idents)
4118 /* Look to see if we have another identifier. */
4120 if (gfc_match_eos () == MATCH_YES)
4121 found_id = MATCH_NO;
4122 else if (gfc_match_char (',') != MATCH_YES)
4123 found_id = MATCH_NO;
4124 else if (gfc_match_name (name) == MATCH_YES)
4126 found_id = MATCH_YES;
4127 gfc_get_ha_symbol (name, &tmp_sym);
4129 else if (match_common_name (name) == MATCH_YES)
4131 found_id = MATCH_YES;
4132 com_block = gfc_get_common (name, 0);
4136 gfc_error ("Missing entity or common block name for "
4137 "attribute specification statement at %C");
4143 gfc_internal_error ("Missing symbol");
4145 } while (found_id == MATCH_YES);
4147 /* if we get here we were successful */
4152 /* Try and match a BIND(C) attribute specification statement. */
4155 gfc_match_bind_c_stmt (void)
4157 match found_match = MATCH_NO;
4162 /* This may not be necessary. */
4164 /* Clear the temporary binding label holder. */
4165 curr_binding_label = NULL;
4167 /* Look for the bind(c). */
4168 found_match = gfc_match_bind_c (NULL, true);
4170 if (found_match == MATCH_YES)
4172 /* Look for the :: now, but it is not required. */
4175 /* Get the identifier(s) that needs to be updated. This may need to
4176 change to hand the flag(s) for the attr specified so all identifiers
4177 found can have all appropriate parts updated (assuming that the same
4178 spec stmt can have multiple attrs, such as both bind(c) and
4180 if (get_bind_c_idents () != SUCCESS)
4181 /* Error message should have printed already. */
4189 /* Match a data declaration statement. */
4192 gfc_match_data_decl (void)
4198 num_idents_on_line = 0;
4200 m = gfc_match_decl_type_spec (¤t_ts, 0);
4204 if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS)
4205 && gfc_current_state () != COMP_DERIVED)
4207 sym = gfc_use_derived (current_ts.u.derived);
4215 current_ts.u.derived = sym;
4218 m = match_attr_spec ();
4219 if (m == MATCH_ERROR)
4225 if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS)
4226 && current_ts.u.derived->components == NULL
4227 && !current_ts.u.derived->attr.zero_comp)
4230 if (current_attr.pointer && gfc_current_state () == COMP_DERIVED)
4233 gfc_find_symbol (current_ts.u.derived->name,
4234 current_ts.u.derived->ns->parent, 1, &sym);
4236 /* Any symbol that we find had better be a type definition
4237 which has its components defined. */
4238 if (sym != NULL && sym->attr.flavor == FL_DERIVED
4239 && (current_ts.u.derived->components != NULL
4240 || current_ts.u.derived->attr.zero_comp))
4243 /* Now we have an error, which we signal, and then fix up
4244 because the knock-on is plain and simple confusing. */
4245 gfc_error_now ("Derived type at %C has not been previously defined "
4246 "and so cannot appear in a derived type definition");
4247 current_attr.pointer = 1;
4252 /* If we have an old-style character declaration, and no new-style
4253 attribute specifications, then there a comma is optional between
4254 the type specification and the variable list. */
4255 if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector)
4256 gfc_match_char (',');
4258 /* Give the types/attributes to symbols that follow. Give the element
4259 a number so that repeat character length expressions can be copied. */
4263 num_idents_on_line++;
4264 m = variable_decl (elem++);
4265 if (m == MATCH_ERROR)
4270 if (gfc_match_eos () == MATCH_YES)
4272 if (gfc_match_char (',') != MATCH_YES)
4276 if (gfc_error_flag_test () == 0)
4277 gfc_error ("Syntax error in data declaration at %C");
4280 gfc_free_data_all (gfc_current_ns);
4283 gfc_free_array_spec (current_as);
4289 /* Match a prefix associated with a function or subroutine
4290 declaration. If the typespec pointer is nonnull, then a typespec
4291 can be matched. Note that if nothing matches, MATCH_YES is
4292 returned (the null string was matched). */
4295 gfc_match_prefix (gfc_typespec *ts)
4301 gfc_clear_attr (¤t_attr);
4303 seen_impure = false;
4305 gcc_assert (!gfc_matching_prefix);
4306 gfc_matching_prefix = true;
4310 found_prefix = false;
4312 if (!seen_type && ts != NULL
4313 && gfc_match_decl_type_spec (ts, 0) == MATCH_YES
4314 && gfc_match_space () == MATCH_YES)
4318 found_prefix = true;
4321 if (gfc_match ("elemental% ") == MATCH_YES)
4323 if (gfc_add_elemental (¤t_attr, NULL) == FAILURE)
4326 found_prefix = true;
4329 if (gfc_match ("pure% ") == MATCH_YES)
4331 if (gfc_add_pure (¤t_attr, NULL) == FAILURE)
4334 found_prefix = true;
4337 if (gfc_match ("recursive% ") == MATCH_YES)
4339 if (gfc_add_recursive (¤t_attr, NULL) == FAILURE)
4342 found_prefix = true;
4345 /* IMPURE is a somewhat special case, as it needs not set an actual
4346 attribute but rather only prevents ELEMENTAL routines from being
4347 automatically PURE. */
4348 if (gfc_match ("impure% ") == MATCH_YES)
4350 if (gfc_notify_std (GFC_STD_F2008,
4351 "Fortran 2008: IMPURE procedure at %C")
4356 found_prefix = true;
4359 while (found_prefix);
4361 /* IMPURE and PURE must not both appear, of course. */
4362 if (seen_impure && current_attr.pure)
4364 gfc_error ("PURE and IMPURE must not appear both at %C");
4368 /* If IMPURE it not seen but the procedure is ELEMENTAL, mark it as PURE. */
4369 if (!seen_impure && current_attr.elemental && !current_attr.pure)
4371 if (gfc_add_pure (¤t_attr, NULL) == FAILURE)
4375 /* At this point, the next item is not a prefix. */
4376 gcc_assert (gfc_matching_prefix);
4377 gfc_matching_prefix = false;
4381 gcc_assert (gfc_matching_prefix);
4382 gfc_matching_prefix = false;
4387 /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */
4390 copy_prefix (symbol_attribute *dest, locus *where)
4392 if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE)
4395 if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE)
4398 if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE)
4405 /* Match a formal argument list. */
4408 gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag)
4410 gfc_formal_arglist *head, *tail, *p, *q;
4411 char name[GFC_MAX_SYMBOL_LEN + 1];
4417 if (gfc_match_char ('(') != MATCH_YES)
4424 if (gfc_match_char (')') == MATCH_YES)
4429 if (gfc_match_char ('*') == MATCH_YES)
4433 m = gfc_match_name (name);
4437 if (gfc_get_symbol (name, NULL, &sym))
4441 p = gfc_get_formal_arglist ();
4453 /* We don't add the VARIABLE flavor because the name could be a
4454 dummy procedure. We don't apply these attributes to formal
4455 arguments of statement functions. */
4456 if (sym != NULL && !st_flag
4457 && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE
4458 || gfc_missing_attr (&sym->attr, NULL) == FAILURE))
4464 /* The name of a program unit can be in a different namespace,
4465 so check for it explicitly. After the statement is accepted,
4466 the name is checked for especially in gfc_get_symbol(). */
4467 if (gfc_new_block != NULL && sym != NULL
4468 && strcmp (sym->name, gfc_new_block->name) == 0)
4470 gfc_error ("Name '%s' at %C is the name of the procedure",
4476 if (gfc_match_char (')') == MATCH_YES)
4479 m = gfc_match_char (',');
4482 gfc_error ("Unexpected junk in formal argument list at %C");
4488 /* Check for duplicate symbols in the formal argument list. */
4491 for (p = head; p->next; p = p->next)
4496 for (q = p->next; q; q = q->next)
4497 if (p->sym == q->sym)
4499 gfc_error ("Duplicate symbol '%s' in formal argument list "
4500 "at %C", p->sym->name);
4508 if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL)
4518 gfc_free_formal_arglist (head);
4523 /* Match a RESULT specification following a function declaration or
4524 ENTRY statement. Also matches the end-of-statement. */
4527 match_result (gfc_symbol *function, gfc_symbol **result)
4529 char name[GFC_MAX_SYMBOL_LEN + 1];
4533 if (gfc_match (" result (") != MATCH_YES)
4536 m = gfc_match_name (name);
4540 /* Get the right paren, and that's it because there could be the
4541 bind(c) attribute after the result clause. */
4542 if (gfc_match_char(')') != MATCH_YES)
4544 /* TODO: should report the missing right paren here. */
4548 if (strcmp (function->name, name) == 0)
4550 gfc_error ("RESULT variable at %C must be different than function name");
4554 if (gfc_get_symbol (name, NULL, &r))
4557 if (gfc_add_result (&r->attr, r->name, NULL) == FAILURE)
4566 /* Match a function suffix, which could be a combination of a result
4567 clause and BIND(C), either one, or neither. The draft does not
4568 require them to come in a specific order. */
4571 gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result)
4573 match is_bind_c; /* Found bind(c). */
4574 match is_result; /* Found result clause. */
4575 match found_match; /* Status of whether we've found a good match. */
4576 char peek_char; /* Character we're going to peek at. */
4577 bool allow_binding_name;
4579 /* Initialize to having found nothing. */
4580 found_match = MATCH_NO;
4581 is_bind_c = MATCH_NO;
4582 is_result = MATCH_NO;
4584 /* Get the next char to narrow between result and bind(c). */
4585 gfc_gobble_whitespace ();
4586 peek_char = gfc_peek_ascii_char ();
4588 /* C binding names are not allowed for internal procedures. */
4589 if (gfc_current_state () == COMP_CONTAINS
4590 && sym->ns->proc_name->attr.flavor != FL_MODULE)
4591 allow_binding_name = false;
4593 allow_binding_name = true;
4598 /* Look for result clause. */
4599 is_result = match_result (sym, result);
4600 if (is_result == MATCH_YES)
4602 /* Now see if there is a bind(c) after it. */
4603 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4604 /* We've found the result clause and possibly bind(c). */
4605 found_match = MATCH_YES;
4608 /* This should only be MATCH_ERROR. */
4609 found_match = is_result;
4612 /* Look for bind(c) first. */
4613 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
4614 if (is_bind_c == MATCH_YES)
4616 /* Now see if a result clause followed it. */
4617 is_result = match_result (sym, result);
4618 found_match = MATCH_YES;
4622 /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */
4623 found_match = MATCH_ERROR;
4627 gfc_error ("Unexpected junk after function declaration at %C");
4628 found_match = MATCH_ERROR;
4632 if (is_bind_c == MATCH_YES)
4634 /* Fortran 2008 draft allows BIND(C) for internal procedures. */
4635 if (gfc_current_state () == COMP_CONTAINS
4636 && sym->ns->proc_name->attr.flavor != FL_MODULE
4637 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
4638 "at %L may not be specified for an internal "
4639 "procedure", &gfc_current_locus)
4643 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1)
4652 /* Procedure pointer return value without RESULT statement:
4653 Add "hidden" result variable named "ppr@". */
4656 add_hidden_procptr_result (gfc_symbol *sym)
4660 if (gfc_notification_std (GFC_STD_F2003) == ERROR)
4663 /* First usage case: PROCEDURE and EXTERNAL statements. */
4664 case1 = gfc_current_state () == COMP_FUNCTION && gfc_current_block ()
4665 && strcmp (gfc_current_block ()->name, sym->name) == 0
4666 && sym->attr.external;
4667 /* Second usage case: INTERFACE statements. */
4668 case2 = gfc_current_state () == COMP_INTERFACE && gfc_state_stack->previous
4669 && gfc_state_stack->previous->state == COMP_FUNCTION
4670 && strcmp (gfc_state_stack->previous->sym->name, sym->name) == 0;
4676 gfc_get_sym_tree ("ppr@", gfc_current_ns, &stree, false);
4680 gfc_get_sym_tree ("ppr@", gfc_current_ns->parent, &stree, false);
4681 st2 = gfc_new_symtree (&gfc_current_ns->sym_root, "ppr@");
4682 st2->n.sym = stree->n.sym;
4684 sym->result = stree->n.sym;
4686 sym->result->attr.proc_pointer = sym->attr.proc_pointer;
4687 sym->result->attr.pointer = sym->attr.pointer;
4688 sym->result->attr.external = sym->attr.external;
4689 sym->result->attr.referenced = sym->attr.referenced;
4690 sym->result->ts = sym->ts;
4691 sym->attr.proc_pointer = 0;
4692 sym->attr.pointer = 0;
4693 sym->attr.external = 0;
4694 if (sym->result->attr.external && sym->result->attr.pointer)
4696 sym->result->attr.pointer = 0;
4697 sym->result->attr.proc_pointer = 1;
4700 return gfc_add_result (&sym->result->attr, sym->result->name, NULL);
4702 /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */
4703 else if (sym->attr.function && !sym->attr.external && sym->attr.pointer
4704 && sym->result && sym->result != sym && sym->result->attr.external
4705 && sym == gfc_current_ns->proc_name
4706 && sym == sym->result->ns->proc_name
4707 && strcmp ("ppr@", sym->result->name) == 0)
4709 sym->result->attr.proc_pointer = 1;
4710 sym->attr.pointer = 0;
4718 /* Match the interface for a PROCEDURE declaration,
4719 including brackets (R1212). */
4722 match_procedure_interface (gfc_symbol **proc_if)
4726 locus old_loc, entry_loc;
4727 gfc_namespace *old_ns = gfc_current_ns;
4728 char name[GFC_MAX_SYMBOL_LEN + 1];
4730 old_loc = entry_loc = gfc_current_locus;
4731 gfc_clear_ts (¤t_ts);
4733 if (gfc_match (" (") != MATCH_YES)
4735 gfc_current_locus = entry_loc;
4739 /* Get the type spec. for the procedure interface. */
4740 old_loc = gfc_current_locus;
4741 m = gfc_match_decl_type_spec (¤t_ts, 0);
4742 gfc_gobble_whitespace ();
4743 if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')'))
4746 if (m == MATCH_ERROR)
4749 /* Procedure interface is itself a procedure. */
4750 gfc_current_locus = old_loc;
4751 m = gfc_match_name (name);
4753 /* First look to see if it is already accessible in the current
4754 namespace because it is use associated or contained. */
4756 if (gfc_find_sym_tree (name, NULL, 0, &st))
4759 /* If it is still not found, then try the parent namespace, if it
4760 exists and create the symbol there if it is still not found. */
4761 if (gfc_current_ns->parent)
4762 gfc_current_ns = gfc_current_ns->parent;
4763 if (st == NULL && gfc_get_ha_sym_tree (name, &st))
4766 gfc_current_ns = old_ns;
4767 *proc_if = st->n.sym;
4769 /* Various interface checks. */
4773 /* Resolve interface if possible. That way, attr.procedure is only set
4774 if it is declared by a later procedure-declaration-stmt, which is
4775 invalid per C1212. */
4776 while ((*proc_if)->ts.interface)
4777 *proc_if = (*proc_if)->ts.interface;
4779 if ((*proc_if)->generic)
4781 gfc_error ("Interface '%s' at %C may not be generic",
4785 if ((*proc_if)->attr.proc == PROC_ST_FUNCTION)
4787 gfc_error ("Interface '%s' at %C may not be a statement function",
4791 /* Handle intrinsic procedures. */
4792 if (!((*proc_if)->attr.external || (*proc_if)->attr.use_assoc
4793 || (*proc_if)->attr.if_source == IFSRC_IFBODY)
4794 && (gfc_is_intrinsic ((*proc_if), 0, gfc_current_locus)
4795 || gfc_is_intrinsic ((*proc_if), 1, gfc_current_locus)))
4796 (*proc_if)->attr.intrinsic = 1;
4797 if ((*proc_if)->attr.intrinsic
4798 && !gfc_intrinsic_actual_ok ((*proc_if)->name, 0))
4800 gfc_error ("Intrinsic procedure '%s' not allowed "
4801 "in PROCEDURE statement at %C", (*proc_if)->name);
4807 if (gfc_match (" )") != MATCH_YES)
4809 gfc_current_locus = entry_loc;
4817 /* Match a PROCEDURE declaration (R1211). */
4820 match_procedure_decl (void)
4823 gfc_symbol *sym, *proc_if = NULL;
4825 gfc_expr *initializer = NULL;
4827 /* Parse interface (with brackets). */
4828 m = match_procedure_interface (&proc_if);
4832 /* Parse attributes (with colons). */
4833 m = match_attr_spec();
4834 if (m == MATCH_ERROR)
4837 /* Get procedure symbols. */
4840 m = gfc_match_symbol (&sym, 0);
4843 else if (m == MATCH_ERROR)
4846 /* Add current_attr to the symbol attributes. */
4847 if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE)
4850 if (sym->attr.is_bind_c)
4852 /* Check for C1218. */
4853 if (!proc_if || !proc_if->attr.is_bind_c)
4855 gfc_error ("BIND(C) attribute at %C requires "
4856 "an interface with BIND(C)");
4859 /* Check for C1217. */
4860 if (has_name_equals && sym->attr.pointer)
4862 gfc_error ("BIND(C) procedure with NAME may not have "
4863 "POINTER attribute at %C");
4866 if (has_name_equals && sym->attr.dummy)
4868 gfc_error ("Dummy procedure at %C may not have "
4869 "BIND(C) attribute with NAME");
4872 /* Set binding label for BIND(C). */
4873 if (set_binding_label (&sym->binding_label, sym->name, num)
4878 if (gfc_add_external (&sym->attr, NULL) == FAILURE)
4881 if (add_hidden_procptr_result (sym) == SUCCESS)
4884 if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE)
4887 /* Set interface. */
4888 if (proc_if != NULL)
4890 if (sym->ts.type != BT_UNKNOWN)
4892 gfc_error ("Procedure '%s' at %L already has basic type of %s",
4893 sym->name, &gfc_current_locus,
4894 gfc_basic_typename (sym->ts.type));
4897 sym->ts.interface = proc_if;
4898 sym->attr.untyped = 1;
4899 sym->attr.if_source = IFSRC_IFBODY;
4901 else if (current_ts.type != BT_UNKNOWN)
4903 if (gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
4905 sym->ts.interface = gfc_new_symbol ("", gfc_current_ns);
4906 sym->ts.interface->ts = current_ts;
4907 sym->ts.interface->attr.flavor = FL_PROCEDURE;
4908 sym->ts.interface->attr.function = 1;
4909 sym->attr.function = 1;
4910 sym->attr.if_source = IFSRC_UNKNOWN;
4913 if (gfc_match (" =>") == MATCH_YES)
4915 if (!current_attr.pointer)
4917 gfc_error ("Initialization at %C isn't for a pointer variable");
4922 m = match_pointer_init (&initializer, 1);
4926 if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus)
4932 gfc_set_sym_referenced (sym);
4934 if (gfc_match_eos () == MATCH_YES)
4936 if (gfc_match_char (',') != MATCH_YES)
4941 gfc_error ("Syntax error in PROCEDURE statement at %C");
4945 /* Free stuff up and return. */
4946 gfc_free_expr (initializer);
4952 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc);
4955 /* Match a procedure pointer component declaration (R445). */
4958 match_ppc_decl (void)
4961 gfc_symbol *proc_if = NULL;
4965 gfc_expr *initializer = NULL;
4966 gfc_typebound_proc* tb;
4967 char name[GFC_MAX_SYMBOL_LEN + 1];
4969 /* Parse interface (with brackets). */
4970 m = match_procedure_interface (&proc_if);
4974 /* Parse attributes. */
4975 tb = XCNEW (gfc_typebound_proc);
4976 tb->where = gfc_current_locus;
4977 m = match_binding_attributes (tb, false, true);
4978 if (m == MATCH_ERROR)
4981 gfc_clear_attr (¤t_attr);
4982 current_attr.procedure = 1;
4983 current_attr.proc_pointer = 1;
4984 current_attr.access = tb->access;
4985 current_attr.flavor = FL_PROCEDURE;
4987 /* Match the colons (required). */
4988 if (gfc_match (" ::") != MATCH_YES)
4990 gfc_error ("Expected '::' after binding-attributes at %C");
4994 /* Check for C450. */
4995 if (!tb->nopass && proc_if == NULL)
4997 gfc_error("NOPASS or explicit interface required at %C");
5001 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Procedure pointer "
5002 "component at %C") == FAILURE)
5005 /* Match PPC names. */
5009 m = gfc_match_name (name);
5012 else if (m == MATCH_ERROR)
5015 if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE)
5018 /* Add current_attr to the symbol attributes. */
5019 if (gfc_copy_attr (&c->attr, ¤t_attr, NULL) == FAILURE)
5022 if (gfc_add_external (&c->attr, NULL) == FAILURE)
5025 if (gfc_add_proc (&c->attr, name, NULL) == FAILURE)
5030 /* Set interface. */
5031 if (proc_if != NULL)
5033 c->ts.interface = proc_if;
5034 c->attr.untyped = 1;
5035 c->attr.if_source = IFSRC_IFBODY;
5037 else if (ts.type != BT_UNKNOWN)
5040 c->ts.interface = gfc_new_symbol ("", gfc_current_ns);
5041 c->ts.interface->ts = ts;
5042 c->ts.interface->attr.flavor = FL_PROCEDURE;
5043 c->ts.interface->attr.function = 1;
5044 c->attr.function = 1;
5045 c->attr.if_source = IFSRC_UNKNOWN;
5048 if (gfc_match (" =>") == MATCH_YES)
5050 m = match_pointer_init (&initializer, 1);
5053 gfc_free_expr (initializer);
5056 c->initializer = initializer;
5059 if (gfc_match_eos () == MATCH_YES)
5061 if (gfc_match_char (',') != MATCH_YES)
5066 gfc_error ("Syntax error in procedure pointer component at %C");
5071 /* Match a PROCEDURE declaration inside an interface (R1206). */
5074 match_procedure_in_interface (void)
5078 char name[GFC_MAX_SYMBOL_LEN + 1];
5080 if (current_interface.type == INTERFACE_NAMELESS
5081 || current_interface.type == INTERFACE_ABSTRACT)
5083 gfc_error ("PROCEDURE at %C must be in a generic interface");
5089 m = gfc_match_name (name);
5092 else if (m == MATCH_ERROR)
5094 if (gfc_get_symbol (name, gfc_current_ns->parent, &sym))
5097 if (gfc_add_interface (sym) == FAILURE)
5100 if (gfc_match_eos () == MATCH_YES)
5102 if (gfc_match_char (',') != MATCH_YES)
5109 gfc_error ("Syntax error in PROCEDURE statement at %C");
5114 /* General matcher for PROCEDURE declarations. */
5116 static match match_procedure_in_type (void);
5119 gfc_match_procedure (void)
5123 switch (gfc_current_state ())
5128 case COMP_SUBROUTINE:
5131 m = match_procedure_decl ();
5133 case COMP_INTERFACE:
5134 m = match_procedure_in_interface ();
5137 m = match_ppc_decl ();
5139 case COMP_DERIVED_CONTAINS:
5140 m = match_procedure_in_type ();
5149 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C")
5157 /* Warn if a matched procedure has the same name as an intrinsic; this is
5158 simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current
5159 parser-state-stack to find out whether we're in a module. */
5162 warn_intrinsic_shadow (const gfc_symbol* sym, bool func)
5166 in_module = (gfc_state_stack->previous
5167 && gfc_state_stack->previous->state == COMP_MODULE);
5169 gfc_warn_intrinsic_shadow (sym, in_module, func);
5173 /* Match a function declaration. */
5176 gfc_match_function_decl (void)
5178 char name[GFC_MAX_SYMBOL_LEN + 1];
5179 gfc_symbol *sym, *result;
5183 match found_match; /* Status returned by match func. */
5185 if (gfc_current_state () != COMP_NONE
5186 && gfc_current_state () != COMP_INTERFACE
5187 && gfc_current_state () != COMP_CONTAINS)
5190 gfc_clear_ts (¤t_ts);
5192 old_loc = gfc_current_locus;
5194 m = gfc_match_prefix (¤t_ts);
5197 gfc_current_locus = old_loc;
5201 if (gfc_match ("function% %n", name) != MATCH_YES)
5203 gfc_current_locus = old_loc;
5206 if (get_proc_name (name, &sym, false))
5209 if (add_hidden_procptr_result (sym) == SUCCESS)
5212 gfc_new_block = sym;
5214 m = gfc_match_formal_arglist (sym, 0, 0);
5217 gfc_error ("Expected formal argument list in function "
5218 "definition at %C");
5222 else if (m == MATCH_ERROR)
5227 /* According to the draft, the bind(c) and result clause can
5228 come in either order after the formal_arg_list (i.e., either
5229 can be first, both can exist together or by themselves or neither
5230 one). Therefore, the match_result can't match the end of the
5231 string, and check for the bind(c) or result clause in either order. */
5232 found_match = gfc_match_eos ();
5234 /* Make sure that it isn't already declared as BIND(C). If it is, it
5235 must have been marked BIND(C) with a BIND(C) attribute and that is
5236 not allowed for procedures. */
5237 if (sym->attr.is_bind_c == 1)
5239 sym->attr.is_bind_c = 0;
5240 if (sym->old_symbol != NULL)
5241 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5242 "variables or common blocks",
5243 &(sym->old_symbol->declared_at));
5245 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5246 "variables or common blocks", &gfc_current_locus);
5249 if (found_match != MATCH_YES)
5251 /* If we haven't found the end-of-statement, look for a suffix. */
5252 suffix_match = gfc_match_suffix (sym, &result);
5253 if (suffix_match == MATCH_YES)
5254 /* Need to get the eos now. */
5255 found_match = gfc_match_eos ();
5257 found_match = suffix_match;
5260 if(found_match != MATCH_YES)
5264 /* Make changes to the symbol. */
5267 if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)
5270 if (gfc_missing_attr (&sym->attr, NULL) == FAILURE
5271 || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
5274 /* Delay matching the function characteristics until after the
5275 specification block by signalling kind=-1. */
5276 sym->declared_at = old_loc;
5277 if (current_ts.type != BT_UNKNOWN)
5278 current_ts.kind = -1;
5280 current_ts.kind = 0;
5284 if (current_ts.type != BT_UNKNOWN
5285 && gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE)
5291 if (current_ts.type != BT_UNKNOWN
5292 && gfc_add_type (result, ¤t_ts, &gfc_current_locus)
5295 sym->result = result;
5298 /* Warn if this procedure has the same name as an intrinsic. */
5299 warn_intrinsic_shadow (sym, true);
5305 gfc_current_locus = old_loc;
5310 /* This is mostly a copy of parse.c(add_global_procedure) but modified to
5311 pass the name of the entry, rather than the gfc_current_block name, and
5312 to return false upon finding an existing global entry. */
5315 add_global_entry (const char *name, int sub)
5318 enum gfc_symbol_type type;
5320 s = gfc_get_gsymbol(name);
5321 type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION;
5324 || (s->type != GSYM_UNKNOWN
5325 && s->type != type))
5326 gfc_global_used(s, NULL);
5330 s->where = gfc_current_locus;
5332 s->ns = gfc_current_ns;
5339 /* Match an ENTRY statement. */
5342 gfc_match_entry (void)
5347 char name[GFC_MAX_SYMBOL_LEN + 1];
5348 gfc_compile_state state;
5352 bool module_procedure;
5356 m = gfc_match_name (name);
5360 if (gfc_notify_std (GFC_STD_F2008_OBS, "Fortran 2008 obsolescent feature: "
5361 "ENTRY statement at %C") == FAILURE)
5364 state = gfc_current_state ();
5365 if (state != COMP_SUBROUTINE && state != COMP_FUNCTION)
5370 gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM");
5373 gfc_error ("ENTRY statement at %C cannot appear within a MODULE");
5375 case COMP_BLOCK_DATA:
5376 gfc_error ("ENTRY statement at %C cannot appear within "
5379 case COMP_INTERFACE:
5380 gfc_error ("ENTRY statement at %C cannot appear within "
5384 gfc_error ("ENTRY statement at %C cannot appear within "
5385 "a DERIVED TYPE block");
5388 gfc_error ("ENTRY statement at %C cannot appear within "
5389 "an IF-THEN block");
5392 case COMP_DO_CONCURRENT:
5393 gfc_error ("ENTRY statement at %C cannot appear within "
5397 gfc_error ("ENTRY statement at %C cannot appear within "
5401 gfc_error ("ENTRY statement at %C cannot appear within "
5405 gfc_error ("ENTRY statement at %C cannot appear within "
5409 gfc_error ("ENTRY statement at %C cannot appear within "
5410 "a contained subprogram");
5413 gfc_internal_error ("gfc_match_entry(): Bad state");
5418 module_procedure = gfc_current_ns->parent != NULL
5419 && gfc_current_ns->parent->proc_name
5420 && gfc_current_ns->parent->proc_name->attr.flavor
5423 if (gfc_current_ns->parent != NULL
5424 && gfc_current_ns->parent->proc_name
5425 && !module_procedure)
5427 gfc_error("ENTRY statement at %C cannot appear in a "
5428 "contained procedure");
5432 /* Module function entries need special care in get_proc_name
5433 because previous references within the function will have
5434 created symbols attached to the current namespace. */
5435 if (get_proc_name (name, &entry,
5436 gfc_current_ns->parent != NULL
5437 && module_procedure))
5440 proc = gfc_current_block ();
5442 /* Make sure that it isn't already declared as BIND(C). If it is, it
5443 must have been marked BIND(C) with a BIND(C) attribute and that is
5444 not allowed for procedures. */
5445 if (entry->attr.is_bind_c == 1)
5447 entry->attr.is_bind_c = 0;
5448 if (entry->old_symbol != NULL)
5449 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5450 "variables or common blocks",
5451 &(entry->old_symbol->declared_at));
5453 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5454 "variables or common blocks", &gfc_current_locus);
5457 /* Check what next non-whitespace character is so we can tell if there
5458 is the required parens if we have a BIND(C). */
5459 gfc_gobble_whitespace ();
5460 peek_char = gfc_peek_ascii_char ();
5462 if (state == COMP_SUBROUTINE)
5464 /* An entry in a subroutine. */
5465 if (!gfc_current_ns->parent && !add_global_entry (name, 1))
5468 m = gfc_match_formal_arglist (entry, 0, 1);
5472 /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can
5473 never be an internal procedure. */
5474 is_bind_c = gfc_match_bind_c (entry, true);
5475 if (is_bind_c == MATCH_ERROR)
5477 if (is_bind_c == MATCH_YES)
5479 if (peek_char != '(')
5481 gfc_error ("Missing required parentheses before BIND(C) at %C");
5484 if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1)
5489 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
5490 || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE)
5495 /* An entry in a function.
5496 We need to take special care because writing
5501 ENTRY f() RESULT (r)
5503 ENTRY f RESULT (r). */
5504 if (!gfc_current_ns->parent && !add_global_entry (name, 0))
5507 old_loc = gfc_current_locus;
5508 if (gfc_match_eos () == MATCH_YES)
5510 gfc_current_locus = old_loc;
5511 /* Match the empty argument list, and add the interface to
5513 m = gfc_match_formal_arglist (entry, 0, 1);
5516 m = gfc_match_formal_arglist (entry, 0, 0);
5523 if (gfc_match_eos () == MATCH_YES)
5525 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
5526 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
5529 entry->result = entry;
5533 m = gfc_match_suffix (entry, &result);
5535 gfc_syntax_error (ST_ENTRY);
5541 if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE
5542 || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE
5543 || gfc_add_function (&entry->attr, result->name, NULL)
5546 entry->result = result;
5550 if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE
5551 || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE)
5553 entry->result = entry;
5558 if (gfc_match_eos () != MATCH_YES)
5560 gfc_syntax_error (ST_ENTRY);
5564 entry->attr.recursive = proc->attr.recursive;
5565 entry->attr.elemental = proc->attr.elemental;
5566 entry->attr.pure = proc->attr.pure;
5568 el = gfc_get_entry_list ();
5570 el->next = gfc_current_ns->entries;
5571 gfc_current_ns->entries = el;
5573 el->id = el->next->id + 1;
5577 new_st.op = EXEC_ENTRY;
5578 new_st.ext.entry = el;
5584 /* Match a subroutine statement, including optional prefixes. */
5587 gfc_match_subroutine (void)
5589 char name[GFC_MAX_SYMBOL_LEN + 1];
5594 bool allow_binding_name;
5596 if (gfc_current_state () != COMP_NONE
5597 && gfc_current_state () != COMP_INTERFACE
5598 && gfc_current_state () != COMP_CONTAINS)
5601 m = gfc_match_prefix (NULL);
5605 m = gfc_match ("subroutine% %n", name);
5609 if (get_proc_name (name, &sym, false))
5612 /* Set declared_at as it might point to, e.g., a PUBLIC statement, if
5613 the symbol existed before. */
5614 sym->declared_at = gfc_current_locus;
5616 if (add_hidden_procptr_result (sym) == SUCCESS)
5619 gfc_new_block = sym;
5621 /* Check what next non-whitespace character is so we can tell if there
5622 is the required parens if we have a BIND(C). */
5623 gfc_gobble_whitespace ();
5624 peek_char = gfc_peek_ascii_char ();
5626 if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE)
5629 if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES)
5632 /* Make sure that it isn't already declared as BIND(C). If it is, it
5633 must have been marked BIND(C) with a BIND(C) attribute and that is
5634 not allowed for procedures. */
5635 if (sym->attr.is_bind_c == 1)
5637 sym->attr.is_bind_c = 0;
5638 if (sym->old_symbol != NULL)
5639 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5640 "variables or common blocks",
5641 &(sym->old_symbol->declared_at));
5643 gfc_error_now ("BIND(C) attribute at %L can only be used for "
5644 "variables or common blocks", &gfc_current_locus);
5647 /* C binding names are not allowed for internal procedures. */
5648 if (gfc_current_state () == COMP_CONTAINS
5649 && sym->ns->proc_name->attr.flavor != FL_MODULE)
5650 allow_binding_name = false;
5652 allow_binding_name = true;
5654 /* Here, we are just checking if it has the bind(c) attribute, and if
5655 so, then we need to make sure it's all correct. If it doesn't,
5656 we still need to continue matching the rest of the subroutine line. */
5657 is_bind_c = gfc_match_bind_c (sym, allow_binding_name);
5658 if (is_bind_c == MATCH_ERROR)
5660 /* There was an attempt at the bind(c), but it was wrong. An
5661 error message should have been printed w/in the gfc_match_bind_c
5662 so here we'll just return the MATCH_ERROR. */
5666 if (is_bind_c == MATCH_YES)
5668 /* The following is allowed in the Fortran 2008 draft. */
5669 if (gfc_current_state () == COMP_CONTAINS
5670 && sym->ns->proc_name->attr.flavor != FL_MODULE
5671 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute "
5672 "at %L may not be specified for an internal "
5673 "procedure", &gfc_current_locus)
5677 if (peek_char != '(')
5679 gfc_error ("Missing required parentheses before BIND(C) at %C");
5682 if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1)
5687 if (gfc_match_eos () != MATCH_YES)
5689 gfc_syntax_error (ST_SUBROUTINE);
5693 if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE)
5696 /* Warn if it has the same name as an intrinsic. */
5697 warn_intrinsic_shadow (sym, false);
5703 /* Match a BIND(C) specifier, with the optional 'name=' specifier if
5704 given, and set the binding label in either the given symbol (if not
5705 NULL), or in the current_ts. The symbol may be NULL because we may
5706 encounter the BIND(C) before the declaration itself. Return
5707 MATCH_NO if what we're looking at isn't a BIND(C) specifier,
5708 MATCH_ERROR if it is a BIND(C) clause but an error was encountered,
5709 or MATCH_YES if the specifier was correct and the binding label and
5710 bind(c) fields were set correctly for the given symbol or the
5711 current_ts. If allow_binding_name is false, no binding name may be
5715 gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name)
5717 /* binding label, if exists */
5718 const char* binding_label = NULL;
5722 /* Initialize the flag that specifies whether we encountered a NAME=
5723 specifier or not. */
5724 has_name_equals = 0;
5726 /* This much we have to be able to match, in this order, if
5727 there is a bind(c) label. */
5728 if (gfc_match (" bind ( c ") != MATCH_YES)
5731 /* Now see if there is a binding label, or if we've reached the
5732 end of the bind(c) attribute without one. */
5733 if (gfc_match_char (',') == MATCH_YES)
5735 if (gfc_match (" name = ") != MATCH_YES)
5737 gfc_error ("Syntax error in NAME= specifier for binding label "
5739 /* should give an error message here */
5743 has_name_equals = 1;
5745 /* Get the opening quote. */
5746 double_quote = MATCH_YES;
5747 single_quote = MATCH_YES;
5748 double_quote = gfc_match_char ('"');
5749 if (double_quote != MATCH_YES)
5750 single_quote = gfc_match_char ('\'');
5751 if (double_quote != MATCH_YES && single_quote != MATCH_YES)
5753 gfc_error ("Syntax error in NAME= specifier for binding label "
5758 /* Grab the binding label, using functions that will not lower
5759 case the names automatically. */
5760 if (gfc_match_name_C (&binding_label) != MATCH_YES)
5763 /* Get the closing quotation. */
5764 if (double_quote == MATCH_YES)
5766 if (gfc_match_char ('"') != MATCH_YES)
5768 gfc_error ("Missing closing quote '\"' for binding label at %C");
5769 /* User started string with '"' so looked to match it. */
5775 if (gfc_match_char ('\'') != MATCH_YES)
5777 gfc_error ("Missing closing quote '\'' for binding label at %C");
5778 /* User started string with "'" char. */
5784 /* Get the required right paren. */
5785 if (gfc_match_char (')') != MATCH_YES)
5787 gfc_error ("Missing closing paren for binding label at %C");
5791 if (has_name_equals && !allow_binding_name)
5793 gfc_error ("No binding name is allowed in BIND(C) at %C");
5797 if (has_name_equals && sym != NULL && sym->attr.dummy)
5799 gfc_error ("For dummy procedure %s, no binding name is "
5800 "allowed in BIND(C) at %C", sym->name);
5805 /* Save the binding label to the symbol. If sym is null, we're
5806 probably matching the typespec attributes of a declaration and
5807 haven't gotten the name yet, and therefore, no symbol yet. */
5811 sym->binding_label = binding_label;
5813 curr_binding_label = binding_label;
5815 else if (allow_binding_name)
5817 /* No binding label, but if symbol isn't null, we
5818 can set the label for it here.
5819 If name="" or allow_binding_name is false, no C binding name is
5821 if (sym != NULL && sym->name != NULL && has_name_equals == 0)
5822 sym->binding_label = IDENTIFIER_POINTER (get_identifier (sym->name));
5825 if (has_name_equals && gfc_current_state () == COMP_INTERFACE
5826 && current_interface.type == INTERFACE_ABSTRACT)
5828 gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C");
5836 /* Return nonzero if we're currently compiling a contained procedure. */
5839 contained_procedure (void)
5841 gfc_state_data *s = gfc_state_stack;
5843 if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION)
5844 && s->previous != NULL && s->previous->state == COMP_CONTAINS)
5850 /* Set the kind of each enumerator. The kind is selected such that it is
5851 interoperable with the corresponding C enumeration type, making
5852 sure that -fshort-enums is honored. */
5857 enumerator_history *current_history = NULL;
5861 if (max_enum == NULL || enum_history == NULL)
5864 if (!flag_short_enums)
5870 kind = gfc_integer_kinds[i++].kind;
5872 while (kind < gfc_c_int_kind
5873 && gfc_check_integer_range (max_enum->initializer->value.integer,
5876 current_history = enum_history;
5877 while (current_history != NULL)
5879 current_history->sym->ts.kind = kind;
5880 current_history = current_history->next;
5885 /* Match any of the various end-block statements. Returns the type of
5886 END to the caller. The END INTERFACE, END IF, END DO, END SELECT
5887 and END BLOCK statements cannot be replaced by a single END statement. */
5890 gfc_match_end (gfc_statement *st)
5892 char name[GFC_MAX_SYMBOL_LEN + 1];
5893 gfc_compile_state state;
5895 const char *block_name;
5900 old_loc = gfc_current_locus;
5901 if (gfc_match ("end") != MATCH_YES)
5904 state = gfc_current_state ();
5905 block_name = gfc_current_block () == NULL
5906 ? NULL : gfc_current_block ()->name;
5910 case COMP_ASSOCIATE:
5912 if (!strncmp (block_name, "block@", strlen("block@")))
5917 case COMP_DERIVED_CONTAINS:
5918 state = gfc_state_stack->previous->state;
5919 block_name = gfc_state_stack->previous->sym == NULL
5920 ? NULL : gfc_state_stack->previous->sym->name;
5931 *st = ST_END_PROGRAM;
5932 target = " program";
5936 case COMP_SUBROUTINE:
5937 *st = ST_END_SUBROUTINE;
5938 target = " subroutine";
5939 eos_ok = !contained_procedure ();
5943 *st = ST_END_FUNCTION;
5944 target = " function";
5945 eos_ok = !contained_procedure ();
5948 case COMP_BLOCK_DATA:
5949 *st = ST_END_BLOCK_DATA;
5950 target = " block data";
5955 *st = ST_END_MODULE;
5960 case COMP_INTERFACE:
5961 *st = ST_END_INTERFACE;
5962 target = " interface";
5967 case COMP_DERIVED_CONTAINS:
5973 case COMP_ASSOCIATE:
5974 *st = ST_END_ASSOCIATE;
5975 target = " associate";
5992 case COMP_DO_CONCURRENT:
5999 *st = ST_END_CRITICAL;
6000 target = " critical";
6005 case COMP_SELECT_TYPE:
6006 *st = ST_END_SELECT;
6012 *st = ST_END_FORALL;
6027 last_initializer = NULL;
6029 gfc_free_enum_history ();
6033 gfc_error ("Unexpected END statement at %C");
6037 if (gfc_match_eos () == MATCH_YES)
6039 if (!eos_ok && (*st == ST_END_SUBROUTINE || *st == ST_END_FUNCTION))
6041 if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: END statement "
6042 "instead of %s statement at %L",
6043 gfc_ascii_statement (*st), &old_loc) == FAILURE)
6048 /* We would have required END [something]. */
6049 gfc_error ("%s statement expected at %L",
6050 gfc_ascii_statement (*st), &old_loc);
6057 /* Verify that we've got the sort of end-block that we're expecting. */
6058 if (gfc_match (target) != MATCH_YES)
6060 gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st));
6064 /* If we're at the end, make sure a block name wasn't required. */
6065 if (gfc_match_eos () == MATCH_YES)
6068 if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT
6069 && *st != ST_END_FORALL && *st != ST_END_WHERE && *st != ST_END_BLOCK
6070 && *st != ST_END_ASSOCIATE && *st != ST_END_CRITICAL)
6076 gfc_error ("Expected block name of '%s' in %s statement at %C",
6077 block_name, gfc_ascii_statement (*st));
6082 /* END INTERFACE has a special handler for its several possible endings. */
6083 if (*st == ST_END_INTERFACE)
6084 return gfc_match_end_interface ();
6086 /* We haven't hit the end of statement, so what is left must be an
6088 m = gfc_match_space ();
6090 m = gfc_match_name (name);
6093 gfc_error ("Expected terminating name at %C");
6097 if (block_name == NULL)
6100 if (strcmp (name, block_name) != 0 && strcmp (block_name, "ppr@") != 0)
6102 gfc_error ("Expected label '%s' for %s statement at %C", block_name,
6103 gfc_ascii_statement (*st));
6106 /* Procedure pointer as function result. */
6107 else if (strcmp (block_name, "ppr@") == 0
6108 && strcmp (name, gfc_current_block ()->ns->proc_name->name) != 0)
6110 gfc_error ("Expected label '%s' for %s statement at %C",
6111 gfc_current_block ()->ns->proc_name->name,
6112 gfc_ascii_statement (*st));
6116 if (gfc_match_eos () == MATCH_YES)
6120 gfc_syntax_error (*st);
6123 gfc_current_locus = old_loc;
6129 /***************** Attribute declaration statements ****************/
6131 /* Set the attribute of a single variable. */
6136 char name[GFC_MAX_SYMBOL_LEN + 1];
6144 m = gfc_match_name (name);
6148 if (find_special (name, &sym, false))
6151 if (check_function_name (name) == FAILURE)
6157 var_locus = gfc_current_locus;
6159 /* Deal with possible array specification for certain attributes. */
6160 if (current_attr.dimension
6161 || current_attr.codimension
6162 || current_attr.allocatable
6163 || current_attr.pointer
6164 || current_attr.target)
6166 m = gfc_match_array_spec (&as, !current_attr.codimension,
6167 !current_attr.dimension
6168 && !current_attr.pointer
6169 && !current_attr.target);
6170 if (m == MATCH_ERROR)
6173 if (current_attr.dimension && m == MATCH_NO)
6175 gfc_error ("Missing array specification at %L in DIMENSION "
6176 "statement", &var_locus);
6181 if (current_attr.dimension && sym->value)
6183 gfc_error ("Dimensions specified for %s at %L after its "
6184 "initialisation", sym->name, &var_locus);
6189 if (current_attr.codimension && m == MATCH_NO)
6191 gfc_error ("Missing array specification at %L in CODIMENSION "
6192 "statement", &var_locus);
6197 if ((current_attr.allocatable || current_attr.pointer)
6198 && (m == MATCH_YES) && (as->type != AS_DEFERRED))
6200 gfc_error ("Array specification must be deferred at %L", &var_locus);
6206 /* Update symbol table. DIMENSION attribute is set in
6207 gfc_set_array_spec(). For CLASS variables, this must be applied
6208 to the first component, or '_data' field. */
6209 if (sym->ts.type == BT_CLASS && sym->ts.u.derived->attr.is_class)
6211 if (gfc_copy_attr (&CLASS_DATA (sym)->attr, ¤t_attr, &var_locus)
6220 if (current_attr.dimension == 0 && current_attr.codimension == 0
6221 && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE)
6228 if (sym->ts.type == BT_CLASS
6229 && gfc_build_class_symbol (&sym->ts, &sym->attr, &sym->as, false) == FAILURE)
6235 if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE)
6241 if (sym->attr.cray_pointee && sym->as != NULL)
6243 /* Fix the array spec. */
6244 m = gfc_mod_pointee_as (sym->as);
6245 if (m == MATCH_ERROR)
6249 if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE)
6255 if ((current_attr.external || current_attr.intrinsic)
6256 && sym->attr.flavor != FL_PROCEDURE
6257 && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE)
6263 add_hidden_procptr_result (sym);
6268 gfc_free_array_spec (as);
6273 /* Generic attribute declaration subroutine. Used for attributes that
6274 just have a list of names. */
6281 /* Gobble the optional double colon, by simply ignoring the result
6291 if (gfc_match_eos () == MATCH_YES)
6297 if (gfc_match_char (',') != MATCH_YES)
6299 gfc_error ("Unexpected character in variable list at %C");
6309 /* This routine matches Cray Pointer declarations of the form:
6310 pointer ( <pointer>, <pointee> )
6312 pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ...
6313 The pointer, if already declared, should be an integer. Otherwise, we
6314 set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may
6315 be either a scalar, or an array declaration. No space is allocated for
6316 the pointee. For the statement
6317 pointer (ipt, ar(10))
6318 any subsequent uses of ar will be translated (in C-notation) as
6319 ar(i) => ((<type> *) ipt)(i)
6320 After gimplification, pointee variable will disappear in the code. */
6323 cray_pointer_decl (void)
6326 gfc_array_spec *as = NULL;
6327 gfc_symbol *cptr; /* Pointer symbol. */
6328 gfc_symbol *cpte; /* Pointee symbol. */
6334 if (gfc_match_char ('(') != MATCH_YES)
6336 gfc_error ("Expected '(' at %C");
6340 /* Match pointer. */
6341 var_locus = gfc_current_locus;
6342 gfc_clear_attr (¤t_attr);
6343 gfc_add_cray_pointer (¤t_attr, &var_locus);
6344 current_ts.type = BT_INTEGER;
6345 current_ts.kind = gfc_index_integer_kind;
6347 m = gfc_match_symbol (&cptr, 0);
6350 gfc_error ("Expected variable name at %C");
6354 if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE)
6357 gfc_set_sym_referenced (cptr);
6359 if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */
6361 cptr->ts.type = BT_INTEGER;
6362 cptr->ts.kind = gfc_index_integer_kind;
6364 else if (cptr->ts.type != BT_INTEGER)
6366 gfc_error ("Cray pointer at %C must be an integer");
6369 else if (cptr->ts.kind < gfc_index_integer_kind)
6370 gfc_warning ("Cray pointer at %C has %d bytes of precision;"
6371 " memory addresses require %d bytes",
6372 cptr->ts.kind, gfc_index_integer_kind);
6374 if (gfc_match_char (',') != MATCH_YES)
6376 gfc_error ("Expected \",\" at %C");
6380 /* Match Pointee. */
6381 var_locus = gfc_current_locus;
6382 gfc_clear_attr (¤t_attr);
6383 gfc_add_cray_pointee (¤t_attr, &var_locus);
6384 current_ts.type = BT_UNKNOWN;
6385 current_ts.kind = 0;
6387 m = gfc_match_symbol (&cpte, 0);
6390 gfc_error ("Expected variable name at %C");
6394 /* Check for an optional array spec. */
6395 m = gfc_match_array_spec (&as, true, false);
6396 if (m == MATCH_ERROR)
6398 gfc_free_array_spec (as);
6401 else if (m == MATCH_NO)
6403 gfc_free_array_spec (as);
6407 if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE)
6410 gfc_set_sym_referenced (cpte);
6412 if (cpte->as == NULL)
6414 if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE)
6415 gfc_internal_error ("Couldn't set Cray pointee array spec.");
6417 else if (as != NULL)
6419 gfc_error ("Duplicate array spec for Cray pointee at %C");
6420 gfc_free_array_spec (as);
6426 if (cpte->as != NULL)
6428 /* Fix array spec. */
6429 m = gfc_mod_pointee_as (cpte->as);
6430 if (m == MATCH_ERROR)
6434 /* Point the Pointee at the Pointer. */
6435 cpte->cp_pointer = cptr;
6437 if (gfc_match_char (')') != MATCH_YES)
6439 gfc_error ("Expected \")\" at %C");
6442 m = gfc_match_char (',');
6444 done = true; /* Stop searching for more declarations. */
6448 if (m == MATCH_ERROR /* Failed when trying to find ',' above. */
6449 || gfc_match_eos () != MATCH_YES)
6451 gfc_error ("Expected \",\" or end of statement at %C");
6459 gfc_match_external (void)
6462 gfc_clear_attr (¤t_attr);
6463 current_attr.external = 1;
6465 return attr_decl ();
6470 gfc_match_intent (void)
6474 /* This is not allowed within a BLOCK construct! */
6475 if (gfc_current_state () == COMP_BLOCK)
6477 gfc_error ("INTENT is not allowed inside of BLOCK at %C");
6481 intent = match_intent_spec ();
6482 if (intent == INTENT_UNKNOWN)
6485 gfc_clear_attr (¤t_attr);
6486 current_attr.intent = intent;
6488 return attr_decl ();
6493 gfc_match_intrinsic (void)
6496 gfc_clear_attr (¤t_attr);
6497 current_attr.intrinsic = 1;
6499 return attr_decl ();
6504 gfc_match_optional (void)
6506 /* This is not allowed within a BLOCK construct! */
6507 if (gfc_current_state () == COMP_BLOCK)
6509 gfc_error ("OPTIONAL is not allowed inside of BLOCK at %C");
6513 gfc_clear_attr (¤t_attr);
6514 current_attr.optional = 1;
6516 return attr_decl ();
6521 gfc_match_pointer (void)
6523 gfc_gobble_whitespace ();
6524 if (gfc_peek_ascii_char () == '(')
6526 if (!gfc_option.flag_cray_pointer)
6528 gfc_error ("Cray pointer declaration at %C requires -fcray-pointer "
6532 return cray_pointer_decl ();
6536 gfc_clear_attr (¤t_attr);
6537 current_attr.pointer = 1;
6539 return attr_decl ();
6545 gfc_match_allocatable (void)
6547 gfc_clear_attr (¤t_attr);
6548 current_attr.allocatable = 1;
6550 return attr_decl ();
6555 gfc_match_codimension (void)
6557 gfc_clear_attr (¤t_attr);
6558 current_attr.codimension = 1;
6560 return attr_decl ();
6565 gfc_match_contiguous (void)
6567 if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: CONTIGUOUS statement at %C")
6571 gfc_clear_attr (¤t_attr);
6572 current_attr.contiguous = 1;
6574 return attr_decl ();
6579 gfc_match_dimension (void)
6581 gfc_clear_attr (¤t_attr);
6582 current_attr.dimension = 1;
6584 return attr_decl ();
6589 gfc_match_target (void)
6591 gfc_clear_attr (¤t_attr);
6592 current_attr.target = 1;
6594 return attr_decl ();
6598 /* Match the list of entities being specified in a PUBLIC or PRIVATE
6602 access_attr_decl (gfc_statement st)
6604 char name[GFC_MAX_SYMBOL_LEN + 1];
6605 interface_type type;
6607 gfc_symbol *sym, *dt_sym;
6608 gfc_intrinsic_op op;
6611 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6616 m = gfc_match_generic_spec (&type, name, &op);
6619 if (m == MATCH_ERROR)
6624 case INTERFACE_NAMELESS:
6625 case INTERFACE_ABSTRACT:
6628 case INTERFACE_GENERIC:
6629 if (gfc_get_symbol (name, NULL, &sym))
6632 if (gfc_add_access (&sym->attr, (st == ST_PUBLIC)
6633 ? ACCESS_PUBLIC : ACCESS_PRIVATE,
6634 sym->name, NULL) == FAILURE)
6637 if (sym->attr.generic && (dt_sym = gfc_find_dt_in_generic (sym))
6638 && gfc_add_access (&dt_sym->attr,
6639 (st == ST_PUBLIC) ? ACCESS_PUBLIC
6641 sym->name, NULL) == FAILURE)
6646 case INTERFACE_INTRINSIC_OP:
6647 if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN)
6649 gfc_intrinsic_op other_op;
6651 gfc_current_ns->operator_access[op] =
6652 (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE;
6654 /* Handle the case if there is another op with the same
6655 function, for INTRINSIC_EQ vs. INTRINSIC_EQ_OS and so on. */
6656 other_op = gfc_equivalent_op (op);
6658 if (other_op != INTRINSIC_NONE)
6659 gfc_current_ns->operator_access[other_op] =
6660 (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE;
6665 gfc_error ("Access specification of the %s operator at %C has "
6666 "already been specified", gfc_op2string (op));
6672 case INTERFACE_USER_OP:
6673 uop = gfc_get_uop (name);
6675 if (uop->access == ACCESS_UNKNOWN)
6677 uop->access = (st == ST_PUBLIC)
6678 ? ACCESS_PUBLIC : ACCESS_PRIVATE;
6682 gfc_error ("Access specification of the .%s. operator at %C "
6683 "has already been specified", sym->name);
6690 if (gfc_match_char (',') == MATCH_NO)
6694 if (gfc_match_eos () != MATCH_YES)
6699 gfc_syntax_error (st);
6707 gfc_match_protected (void)
6712 if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE)
6714 gfc_error ("PROTECTED at %C only allowed in specification "
6715 "part of a module");
6720 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C")
6724 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
6729 if (gfc_match_eos () == MATCH_YES)
6734 m = gfc_match_symbol (&sym, 0);
6738 if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus)
6751 if (gfc_match_eos () == MATCH_YES)
6753 if (gfc_match_char (',') != MATCH_YES)
6760 gfc_error ("Syntax error in PROTECTED statement at %C");
6765 /* The PRIVATE statement is a bit weird in that it can be an attribute
6766 declaration, but also works as a standalone statement inside of a
6767 type declaration or a module. */
6770 gfc_match_private (gfc_statement *st)
6773 if (gfc_match ("private") != MATCH_YES)
6776 if (gfc_current_state () != COMP_MODULE
6777 && !(gfc_current_state () == COMP_DERIVED
6778 && gfc_state_stack->previous
6779 && gfc_state_stack->previous->state == COMP_MODULE)
6780 && !(gfc_current_state () == COMP_DERIVED_CONTAINS
6781 && gfc_state_stack->previous && gfc_state_stack->previous->previous
6782 && gfc_state_stack->previous->previous->state == COMP_MODULE))
6784 gfc_error ("PRIVATE statement at %C is only allowed in the "
6785 "specification part of a module");
6789 if (gfc_current_state () == COMP_DERIVED)
6791 if (gfc_match_eos () == MATCH_YES)
6797 gfc_syntax_error (ST_PRIVATE);
6801 if (gfc_match_eos () == MATCH_YES)
6808 return access_attr_decl (ST_PRIVATE);
6813 gfc_match_public (gfc_statement *st)
6816 if (gfc_match ("public") != MATCH_YES)
6819 if (gfc_current_state () != COMP_MODULE)
6821 gfc_error ("PUBLIC statement at %C is only allowed in the "
6822 "specification part of a module");
6826 if (gfc_match_eos () == MATCH_YES)
6833 return access_attr_decl (ST_PUBLIC);
6837 /* Workhorse for gfc_match_parameter. */
6847 m = gfc_match_symbol (&sym, 0);
6849 gfc_error ("Expected variable name at %C in PARAMETER statement");
6854 if (gfc_match_char ('=') == MATCH_NO)
6856 gfc_error ("Expected = sign in PARAMETER statement at %C");
6860 m = gfc_match_init_expr (&init);
6862 gfc_error ("Expected expression at %C in PARAMETER statement");
6866 if (sym->ts.type == BT_UNKNOWN
6867 && gfc_set_default_type (sym, 1, NULL) == FAILURE)
6873 if (gfc_check_assign_symbol (sym, init) == FAILURE
6874 || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE)
6882 gfc_error ("Initializing already initialized variable at %C");
6887 t = add_init_expr_to_sym (sym->name, &init, &gfc_current_locus);
6888 return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
6891 gfc_free_expr (init);
6896 /* Match a parameter statement, with the weird syntax that these have. */
6899 gfc_match_parameter (void)
6903 if (gfc_match_char ('(') == MATCH_NO)
6912 if (gfc_match (" )%t") == MATCH_YES)
6915 if (gfc_match_char (',') != MATCH_YES)
6917 gfc_error ("Unexpected characters in PARAMETER statement at %C");
6927 /* Save statements have a special syntax. */
6930 gfc_match_save (void)
6932 char n[GFC_MAX_SYMBOL_LEN+1];
6937 if (gfc_match_eos () == MATCH_YES)
6939 if (gfc_current_ns->seen_save)
6941 if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C "
6942 "follows previous SAVE statement")
6947 gfc_current_ns->save_all = gfc_current_ns->seen_save = 1;
6951 if (gfc_current_ns->save_all)
6953 if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows "
6954 "blanket SAVE statement")
6963 m = gfc_match_symbol (&sym, 0);
6967 if (gfc_add_save (&sym->attr, SAVE_EXPLICIT, sym->name,
6968 &gfc_current_locus) == FAILURE)
6979 m = gfc_match (" / %n /", &n);
6980 if (m == MATCH_ERROR)
6985 c = gfc_get_common (n, 0);
6988 gfc_current_ns->seen_save = 1;
6991 if (gfc_match_eos () == MATCH_YES)
6993 if (gfc_match_char (',') != MATCH_YES)
7000 gfc_error ("Syntax error in SAVE statement at %C");
7006 gfc_match_value (void)
7011 /* This is not allowed within a BLOCK construct! */
7012 if (gfc_current_state () == COMP_BLOCK)
7014 gfc_error ("VALUE is not allowed inside of BLOCK at %C");
7018 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C")
7022 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
7027 if (gfc_match_eos () == MATCH_YES)
7032 m = gfc_match_symbol (&sym, 0);
7036 if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus)
7049 if (gfc_match_eos () == MATCH_YES)
7051 if (gfc_match_char (',') != MATCH_YES)
7058 gfc_error ("Syntax error in VALUE statement at %C");
7064 gfc_match_volatile (void)
7069 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C")
7073 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
7078 if (gfc_match_eos () == MATCH_YES)
7083 /* VOLATILE is special because it can be added to host-associated
7084 symbols locally. Except for coarrays. */
7085 m = gfc_match_symbol (&sym, 1);
7089 /* F2008, C560+C561. VOLATILE for host-/use-associated variable or
7090 for variable in a BLOCK which is defined outside of the BLOCK. */
7091 if (sym->ns != gfc_current_ns && sym->attr.codimension)
7093 gfc_error ("Specifying VOLATILE for coarray variable '%s' at "
7094 "%C, which is use-/host-associated", sym->name);
7097 if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus)
7110 if (gfc_match_eos () == MATCH_YES)
7112 if (gfc_match_char (',') != MATCH_YES)
7119 gfc_error ("Syntax error in VOLATILE statement at %C");
7125 gfc_match_asynchronous (void)
7130 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ASYNCHRONOUS statement at %C")
7134 if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO)
7139 if (gfc_match_eos () == MATCH_YES)
7144 /* ASYNCHRONOUS is special because it can be added to host-associated
7146 m = gfc_match_symbol (&sym, 1);
7150 if (gfc_add_asynchronous (&sym->attr, sym->name, &gfc_current_locus)
7163 if (gfc_match_eos () == MATCH_YES)
7165 if (gfc_match_char (',') != MATCH_YES)
7172 gfc_error ("Syntax error in ASYNCHRONOUS statement at %C");
7177 /* Match a module procedure statement. Note that we have to modify
7178 symbols in the parent's namespace because the current one was there
7179 to receive symbols that are in an interface's formal argument list. */
7182 gfc_match_modproc (void)
7184 char name[GFC_MAX_SYMBOL_LEN + 1];
7188 gfc_namespace *module_ns;
7189 gfc_interface *old_interface_head, *interface;
7191 if (gfc_state_stack->state != COMP_INTERFACE
7192 || gfc_state_stack->previous == NULL
7193 || current_interface.type == INTERFACE_NAMELESS
7194 || current_interface.type == INTERFACE_ABSTRACT)
7196 gfc_error ("MODULE PROCEDURE at %C must be in a generic module "
7201 module_ns = gfc_current_ns->parent;
7202 for (; module_ns; module_ns = module_ns->parent)
7203 if (module_ns->proc_name->attr.flavor == FL_MODULE
7204 || module_ns->proc_name->attr.flavor == FL_PROGRAM
7205 || (module_ns->proc_name->attr.flavor == FL_PROCEDURE
7206 && !module_ns->proc_name->attr.contained))
7209 if (module_ns == NULL)
7212 /* Store the current state of the interface. We will need it if we
7213 end up with a syntax error and need to recover. */
7214 old_interface_head = gfc_current_interface_head ();
7216 /* Check if the F2008 optional double colon appears. */
7217 gfc_gobble_whitespace ();
7218 old_locus = gfc_current_locus;
7219 if (gfc_match ("::") == MATCH_YES)
7221 if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: double colon in "
7222 "MODULE PROCEDURE statement at %L", &old_locus)
7227 gfc_current_locus = old_locus;
7232 old_locus = gfc_current_locus;
7234 m = gfc_match_name (name);
7240 /* Check for syntax error before starting to add symbols to the
7241 current namespace. */
7242 if (gfc_match_eos () == MATCH_YES)
7245 if (!last && gfc_match_char (',') != MATCH_YES)
7248 /* Now we're sure the syntax is valid, we process this item
7250 if (gfc_get_symbol (name, module_ns, &sym))
7253 if (sym->attr.intrinsic)
7255 gfc_error ("Intrinsic procedure at %L cannot be a MODULE "
7256 "PROCEDURE", &old_locus);
7260 if (sym->attr.proc != PROC_MODULE
7261 && gfc_add_procedure (&sym->attr, PROC_MODULE,
7262 sym->name, NULL) == FAILURE)
7265 if (gfc_add_interface (sym) == FAILURE)
7268 sym->attr.mod_proc = 1;
7269 sym->declared_at = old_locus;
7278 /* Restore the previous state of the interface. */
7279 interface = gfc_current_interface_head ();
7280 gfc_set_current_interface_head (old_interface_head);
7282 /* Free the new interfaces. */
7283 while (interface != old_interface_head)
7285 gfc_interface *i = interface->next;
7290 /* And issue a syntax error. */
7291 gfc_syntax_error (ST_MODULE_PROC);
7296 /* Check a derived type that is being extended. */
7298 check_extended_derived_type (char *name)
7300 gfc_symbol *extended;
7302 if (gfc_find_symbol (name, gfc_current_ns, 1, &extended))
7304 gfc_error ("Ambiguous symbol in TYPE definition at %C");
7310 gfc_error ("No such symbol in TYPE definition at %C");
7314 extended = gfc_find_dt_in_generic (extended);
7316 if (extended->attr.flavor != FL_DERIVED)
7318 gfc_error ("'%s' in EXTENDS expression at %C is not a "
7319 "derived type", name);
7323 if (extended->attr.is_bind_c)
7325 gfc_error ("'%s' cannot be extended at %C because it "
7326 "is BIND(C)", extended->name);
7330 if (extended->attr.sequence)
7332 gfc_error ("'%s' cannot be extended at %C because it "
7333 "is a SEQUENCE type", extended->name);
7341 /* Match the optional attribute specifiers for a type declaration.
7342 Return MATCH_ERROR if an error is encountered in one of the handled
7343 attributes (public, private, bind(c)), MATCH_NO if what's found is
7344 not a handled attribute, and MATCH_YES otherwise. TODO: More error
7345 checking on attribute conflicts needs to be done. */
7348 gfc_get_type_attr_spec (symbol_attribute *attr, char *name)
7350 /* See if the derived type is marked as private. */
7351 if (gfc_match (" , private") == MATCH_YES)
7353 if (gfc_current_state () != COMP_MODULE)
7355 gfc_error ("Derived type at %C can only be PRIVATE in the "
7356 "specification part of a module");
7360 if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE)
7363 else if (gfc_match (" , public") == MATCH_YES)
7365 if (gfc_current_state () != COMP_MODULE)
7367 gfc_error ("Derived type at %C can only be PUBLIC in the "
7368 "specification part of a module");
7372 if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE)
7375 else if (gfc_match (" , bind ( c )") == MATCH_YES)
7377 /* If the type is defined to be bind(c) it then needs to make
7378 sure that all fields are interoperable. This will
7379 need to be a semantic check on the finished derived type.
7380 See 15.2.3 (lines 9-12) of F2003 draft. */
7381 if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS)
7384 /* TODO: attr conflicts need to be checked, probably in symbol.c. */
7386 else if (gfc_match (" , abstract") == MATCH_YES)
7388 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ABSTRACT type at %C")
7392 if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE)
7395 else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES)
7397 if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE)
7403 /* If we get here, something matched. */
7408 /* Match the beginning of a derived type declaration. If a type name
7409 was the result of a function, then it is possible to have a symbol
7410 already to be known as a derived type yet have no components. */
7413 gfc_match_derived_decl (void)
7415 char name[GFC_MAX_SYMBOL_LEN + 1];
7416 char parent[GFC_MAX_SYMBOL_LEN + 1];
7417 symbol_attribute attr;
7418 gfc_symbol *sym, *gensym;
7419 gfc_symbol *extended;
7421 match is_type_attr_spec = MATCH_NO;
7422 bool seen_attr = false;
7423 gfc_interface *intr = NULL, *head;
7425 if (gfc_current_state () == COMP_DERIVED)
7430 gfc_clear_attr (&attr);
7435 is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent);
7436 if (is_type_attr_spec == MATCH_ERROR)
7438 if (is_type_attr_spec == MATCH_YES)
7440 } while (is_type_attr_spec == MATCH_YES);
7442 /* Deal with derived type extensions. The extension attribute has
7443 been added to 'attr' but now the parent type must be found and
7446 extended = check_extended_derived_type (parent);
7448 if (parent[0] && !extended)
7451 if (gfc_match (" ::") != MATCH_YES && seen_attr)
7453 gfc_error ("Expected :: in TYPE definition at %C");
7457 m = gfc_match (" %n%t", name);
7461 /* Make sure the name is not the name of an intrinsic type. */
7462 if (gfc_is_intrinsic_typename (name))
7464 gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic "
7469 if (gfc_get_symbol (name, NULL, &gensym))
7472 if (!gensym->attr.generic && gensym->ts.type != BT_UNKNOWN)
7474 gfc_error ("Derived type name '%s' at %C already has a basic type "
7475 "of %s", gensym->name, gfc_typename (&gensym->ts));
7479 if (!gensym->attr.generic
7480 && gfc_add_generic (&gensym->attr, gensym->name, NULL) == FAILURE)
7483 if (!gensym->attr.function
7484 && gfc_add_function (&gensym->attr, gensym->name, NULL) == FAILURE)
7487 sym = gfc_find_dt_in_generic (gensym);
7489 if (sym && (sym->components != NULL || sym->attr.zero_comp))
7491 gfc_error ("Derived type definition of '%s' at %C has already been "
7492 "defined", sym->name);
7498 /* Use upper case to save the actual derived-type symbol. */
7499 gfc_get_symbol (gfc_get_string ("%c%s",
7500 (char) TOUPPER ((unsigned char) gensym->name[0]),
7501 &gensym->name[1]), NULL, &sym);
7502 sym->name = gfc_get_string (gensym->name);
7503 head = gensym->generic;
7504 intr = gfc_get_interface ();
7506 intr->where = gfc_current_locus;
7507 intr->sym->declared_at = gfc_current_locus;
7509 gensym->generic = intr;
7510 gensym->attr.if_source = IFSRC_DECL;
7513 /* The symbol may already have the derived attribute without the
7514 components. The ways this can happen is via a function
7515 definition, an INTRINSIC statement or a subtype in another
7516 derived type that is a pointer. The first part of the AND clause
7517 is true if the symbol is not the return value of a function. */
7518 if (sym->attr.flavor != FL_DERIVED
7519 && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE)
7522 if (attr.access != ACCESS_UNKNOWN
7523 && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE)
7525 else if (sym->attr.access == ACCESS_UNKNOWN
7526 && gensym->attr.access != ACCESS_UNKNOWN
7527 && gfc_add_access (&sym->attr, gensym->attr.access, sym->name, NULL)
7531 if (sym->attr.access != ACCESS_UNKNOWN
7532 && gensym->attr.access == ACCESS_UNKNOWN)
7533 gensym->attr.access = sym->attr.access;
7535 /* See if the derived type was labeled as bind(c). */
7536 if (attr.is_bind_c != 0)
7537 sym->attr.is_bind_c = attr.is_bind_c;
7539 /* Construct the f2k_derived namespace if it is not yet there. */
7540 if (!sym->f2k_derived)
7541 sym->f2k_derived = gfc_get_namespace (NULL, 0);
7543 if (extended && !sym->components)
7548 /* Add the extended derived type as the first component. */
7549 gfc_add_component (sym, parent, &p);
7551 gfc_set_sym_referenced (extended);
7553 p->ts.type = BT_DERIVED;
7554 p->ts.u.derived = extended;
7555 p->initializer = gfc_default_initializer (&p->ts);
7557 /* Set extension level. */
7558 if (extended->attr.extension == 255)
7560 /* Since the extension field is 8 bit wide, we can only have
7561 up to 255 extension levels. */
7562 gfc_error ("Maximum extension level reached with type '%s' at %L",
7563 extended->name, &extended->declared_at);
7566 sym->attr.extension = extended->attr.extension + 1;
7568 /* Provide the links between the extended type and its extension. */
7569 if (!extended->f2k_derived)
7570 extended->f2k_derived = gfc_get_namespace (NULL, 0);
7571 st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name);
7575 if (!sym->hash_value)
7576 /* Set the hash for the compound name for this type. */
7577 sym->hash_value = gfc_hash_value (sym);
7579 /* Take over the ABSTRACT attribute. */
7580 sym->attr.abstract = attr.abstract;
7582 gfc_new_block = sym;
7588 /* Cray Pointees can be declared as:
7589 pointer (ipt, a (n,m,...,*)) */
7592 gfc_mod_pointee_as (gfc_array_spec *as)
7594 as->cray_pointee = true; /* This will be useful to know later. */
7595 if (as->type == AS_ASSUMED_SIZE)
7596 as->cp_was_assumed = true;
7597 else if (as->type == AS_ASSUMED_SHAPE)
7599 gfc_error ("Cray Pointee at %C cannot be assumed shape array");
7606 /* Match the enum definition statement, here we are trying to match
7607 the first line of enum definition statement.
7608 Returns MATCH_YES if match is found. */
7611 gfc_match_enum (void)
7615 m = gfc_match_eos ();
7619 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C")
7627 /* Returns an initializer whose value is one higher than the value of the
7628 LAST_INITIALIZER argument. If the argument is NULL, the
7629 initializers value will be set to zero. The initializer's kind
7630 will be set to gfc_c_int_kind.
7632 If -fshort-enums is given, the appropriate kind will be selected
7633 later after all enumerators have been parsed. A warning is issued
7634 here if an initializer exceeds gfc_c_int_kind. */
7637 enum_initializer (gfc_expr *last_initializer, locus where)
7640 result = gfc_get_constant_expr (BT_INTEGER, gfc_c_int_kind, &where);
7642 mpz_init (result->value.integer);
7644 if (last_initializer != NULL)
7646 mpz_add_ui (result->value.integer, last_initializer->value.integer, 1);
7647 result->where = last_initializer->where;
7649 if (gfc_check_integer_range (result->value.integer,
7650 gfc_c_int_kind) != ARITH_OK)
7652 gfc_error ("Enumerator exceeds the C integer type at %C");
7658 /* Control comes here, if it's the very first enumerator and no
7659 initializer has been given. It will be initialized to zero. */
7660 mpz_set_si (result->value.integer, 0);
7667 /* Match a variable name with an optional initializer. When this
7668 subroutine is called, a variable is expected to be parsed next.
7669 Depending on what is happening at the moment, updates either the
7670 symbol table or the current interface. */
7673 enumerator_decl (void)
7675 char name[GFC_MAX_SYMBOL_LEN + 1];
7676 gfc_expr *initializer;
7677 gfc_array_spec *as = NULL;
7685 old_locus = gfc_current_locus;
7687 /* When we get here, we've just matched a list of attributes and
7688 maybe a type and a double colon. The next thing we expect to see
7689 is the name of the symbol. */
7690 m = gfc_match_name (name);
7694 var_locus = gfc_current_locus;
7696 /* OK, we've successfully matched the declaration. Now put the
7697 symbol in the current namespace. If we fail to create the symbol,
7699 if (build_sym (name, NULL, false, &as, &var_locus) == FAILURE)
7705 /* The double colon must be present in order to have initializers.
7706 Otherwise the statement is ambiguous with an assignment statement. */
7709 if (gfc_match_char ('=') == MATCH_YES)
7711 m = gfc_match_init_expr (&initializer);
7714 gfc_error ("Expected an initialization expression at %C");
7723 /* If we do not have an initializer, the initialization value of the
7724 previous enumerator (stored in last_initializer) is incremented
7725 by 1 and is used to initialize the current enumerator. */
7726 if (initializer == NULL)
7727 initializer = enum_initializer (last_initializer, old_locus);
7729 if (initializer == NULL || initializer->ts.type != BT_INTEGER)
7731 gfc_error ("ENUMERATOR %L not initialized with integer expression",
7737 /* Store this current initializer, for the next enumerator variable
7738 to be parsed. add_init_expr_to_sym() zeros initializer, so we
7739 use last_initializer below. */
7740 last_initializer = initializer;
7741 t = add_init_expr_to_sym (name, &initializer, &var_locus);
7743 /* Maintain enumerator history. */
7744 gfc_find_symbol (name, NULL, 0, &sym);
7745 create_enum_history (sym, last_initializer);
7747 return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR;
7750 /* Free stuff up and return. */
7751 gfc_free_expr (initializer);
7757 /* Match the enumerator definition statement. */
7760 gfc_match_enumerator_def (void)
7765 gfc_clear_ts (¤t_ts);
7767 m = gfc_match (" enumerator");
7771 m = gfc_match (" :: ");
7772 if (m == MATCH_ERROR)
7775 colon_seen = (m == MATCH_YES);
7777 if (gfc_current_state () != COMP_ENUM)
7779 gfc_error ("ENUM definition statement expected before %C");
7780 gfc_free_enum_history ();
7784 (¤t_ts)->type = BT_INTEGER;
7785 (¤t_ts)->kind = gfc_c_int_kind;
7787 gfc_clear_attr (¤t_attr);
7788 t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL);
7797 m = enumerator_decl ();
7798 if (m == MATCH_ERROR)
7800 gfc_free_enum_history ();
7806 if (gfc_match_eos () == MATCH_YES)
7808 if (gfc_match_char (',') != MATCH_YES)
7812 if (gfc_current_state () == COMP_ENUM)
7814 gfc_free_enum_history ();
7815 gfc_error ("Syntax error in ENUMERATOR definition at %C");
7820 gfc_free_array_spec (current_as);
7827 /* Match binding attributes. */
7830 match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc)
7832 bool found_passing = false;
7833 bool seen_ptr = false;
7834 match m = MATCH_YES;
7836 /* Intialize to defaults. Do so even before the MATCH_NO check so that in
7837 this case the defaults are in there. */
7838 ba->access = ACCESS_UNKNOWN;
7839 ba->pass_arg = NULL;
7840 ba->pass_arg_num = 0;
7842 ba->non_overridable = 0;
7846 /* If we find a comma, we believe there are binding attributes. */
7847 m = gfc_match_char (',');
7853 /* Access specifier. */
7855 m = gfc_match (" public");
7856 if (m == MATCH_ERROR)
7860 if (ba->access != ACCESS_UNKNOWN)
7862 gfc_error ("Duplicate access-specifier at %C");
7866 ba->access = ACCESS_PUBLIC;
7870 m = gfc_match (" private");
7871 if (m == MATCH_ERROR)
7875 if (ba->access != ACCESS_UNKNOWN)
7877 gfc_error ("Duplicate access-specifier at %C");
7881 ba->access = ACCESS_PRIVATE;
7885 /* If inside GENERIC, the following is not allowed. */
7890 m = gfc_match (" nopass");
7891 if (m == MATCH_ERROR)
7897 gfc_error ("Binding attributes already specify passing,"
7898 " illegal NOPASS at %C");
7902 found_passing = true;
7907 /* PASS possibly including argument. */
7908 m = gfc_match (" pass");
7909 if (m == MATCH_ERROR)
7913 char arg[GFC_MAX_SYMBOL_LEN + 1];
7917 gfc_error ("Binding attributes already specify passing,"
7918 " illegal PASS at %C");
7922 m = gfc_match (" ( %n )", arg);
7923 if (m == MATCH_ERROR)
7926 ba->pass_arg = gfc_get_string (arg);
7927 gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL));
7929 found_passing = true;
7937 m = gfc_match (" pointer");
7938 if (m == MATCH_ERROR)
7944 gfc_error ("Duplicate POINTER attribute at %C");
7954 /* NON_OVERRIDABLE flag. */
7955 m = gfc_match (" non_overridable");
7956 if (m == MATCH_ERROR)
7960 if (ba->non_overridable)
7962 gfc_error ("Duplicate NON_OVERRIDABLE at %C");
7966 ba->non_overridable = 1;
7970 /* DEFERRED flag. */
7971 m = gfc_match (" deferred");
7972 if (m == MATCH_ERROR)
7978 gfc_error ("Duplicate DEFERRED at %C");
7989 /* Nothing matching found. */
7991 gfc_error ("Expected access-specifier at %C");
7993 gfc_error ("Expected binding attribute at %C");
7996 while (gfc_match_char (',') == MATCH_YES);
7998 /* NON_OVERRIDABLE and DEFERRED exclude themselves. */
7999 if (ba->non_overridable && ba->deferred)
8001 gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C");
8008 if (ba->access == ACCESS_UNKNOWN)
8009 ba->access = gfc_typebound_default_access;
8011 if (ppc && !seen_ptr)
8013 gfc_error ("POINTER attribute is required for procedure pointer component"
8025 /* Match a PROCEDURE specific binding inside a derived type. */
8028 match_procedure_in_type (void)
8030 char name[GFC_MAX_SYMBOL_LEN + 1];
8031 char target_buf[GFC_MAX_SYMBOL_LEN + 1];
8032 char* target = NULL, *ifc = NULL;
8033 gfc_typebound_proc tb;
8042 /* Check current state. */
8043 gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS);
8044 block = gfc_state_stack->previous->sym;
8047 /* Try to match PROCEDURE(interface). */
8048 if (gfc_match (" (") == MATCH_YES)
8050 m = gfc_match_name (target_buf);
8051 if (m == MATCH_ERROR)
8055 gfc_error ("Interface-name expected after '(' at %C");
8059 if (gfc_match (" )") != MATCH_YES)
8061 gfc_error ("')' expected at %C");
8068 /* Construct the data structure. */
8069 memset (&tb, 0, sizeof (tb));
8070 tb.where = gfc_current_locus;
8072 /* Match binding attributes. */
8073 m = match_binding_attributes (&tb, false, false);
8074 if (m == MATCH_ERROR)
8076 seen_attrs = (m == MATCH_YES);
8078 /* Check that attribute DEFERRED is given if an interface is specified. */
8079 if (tb.deferred && !ifc)
8081 gfc_error ("Interface must be specified for DEFERRED binding at %C");
8084 if (ifc && !tb.deferred)
8086 gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED");
8090 /* Match the colons. */
8091 m = gfc_match (" ::");
8092 if (m == MATCH_ERROR)
8094 seen_colons = (m == MATCH_YES);
8095 if (seen_attrs && !seen_colons)
8097 gfc_error ("Expected '::' after binding-attributes at %C");
8101 /* Match the binding names. */
8104 m = gfc_match_name (name);
8105 if (m == MATCH_ERROR)
8109 gfc_error ("Expected binding name at %C");
8113 if (num>1 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: PROCEDURE list"
8114 " at %C") == FAILURE)
8117 /* Try to match the '=> target', if it's there. */
8119 m = gfc_match (" =>");
8120 if (m == MATCH_ERROR)
8126 gfc_error ("'=> target' is invalid for DEFERRED binding at %C");
8132 gfc_error ("'::' needed in PROCEDURE binding with explicit target"
8137 m = gfc_match_name (target_buf);
8138 if (m == MATCH_ERROR)
8142 gfc_error ("Expected binding target after '=>' at %C");
8145 target = target_buf;
8148 /* If no target was found, it has the same name as the binding. */
8152 /* Get the namespace to insert the symbols into. */
8153 ns = block->f2k_derived;
8156 /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */
8157 if (tb.deferred && !block->attr.abstract)
8159 gfc_error ("Type '%s' containing DEFERRED binding at %C "
8160 "is not ABSTRACT", block->name);
8164 /* See if we already have a binding with this name in the symtree which
8165 would be an error. If a GENERIC already targetted this binding, it may
8166 be already there but then typebound is still NULL. */
8167 stree = gfc_find_symtree (ns->tb_sym_root, name);
8168 if (stree && stree->n.tb)
8170 gfc_error ("There is already a procedure with binding name '%s' for "
8171 "the derived type '%s' at %C", name, block->name);
8175 /* Insert it and set attributes. */
8179 stree = gfc_new_symtree (&ns->tb_sym_root, name);
8182 stree->n.tb = gfc_get_typebound_proc (&tb);
8184 if (gfc_get_sym_tree (target, gfc_current_ns, &stree->n.tb->u.specific,
8187 gfc_set_sym_referenced (stree->n.tb->u.specific->n.sym);
8189 if (gfc_match_eos () == MATCH_YES)
8191 if (gfc_match_char (',') != MATCH_YES)
8196 gfc_error ("Syntax error in PROCEDURE statement at %C");
8201 /* Match a GENERIC procedure binding inside a derived type. */
8204 gfc_match_generic (void)
8206 char name[GFC_MAX_SYMBOL_LEN + 1];
8207 char bind_name[GFC_MAX_SYMBOL_LEN + 16]; /* Allow space for OPERATOR(...). */
8209 gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */
8210 gfc_typebound_proc* tb;
8212 interface_type op_type;
8213 gfc_intrinsic_op op;
8216 /* Check current state. */
8217 if (gfc_current_state () == COMP_DERIVED)
8219 gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS");
8222 if (gfc_current_state () != COMP_DERIVED_CONTAINS)
8224 block = gfc_state_stack->previous->sym;
8225 ns = block->f2k_derived;
8226 gcc_assert (block && ns);
8228 memset (&tbattr, 0, sizeof (tbattr));
8229 tbattr.where = gfc_current_locus;
8231 /* See if we get an access-specifier. */
8232 m = match_binding_attributes (&tbattr, true, false);
8233 if (m == MATCH_ERROR)
8236 /* Now the colons, those are required. */
8237 if (gfc_match (" ::") != MATCH_YES)
8239 gfc_error ("Expected '::' at %C");
8243 /* Match the binding name; depending on type (operator / generic) format
8244 it for future error messages into bind_name. */
8246 m = gfc_match_generic_spec (&op_type, name, &op);
8247 if (m == MATCH_ERROR)
8251 gfc_error ("Expected generic name or operator descriptor at %C");
8257 case INTERFACE_GENERIC:
8258 snprintf (bind_name, sizeof (bind_name), "%s", name);
8261 case INTERFACE_USER_OP:
8262 snprintf (bind_name, sizeof (bind_name), "OPERATOR(.%s.)", name);
8265 case INTERFACE_INTRINSIC_OP:
8266 snprintf (bind_name, sizeof (bind_name), "OPERATOR(%s)",
8267 gfc_op2string (op));
8274 /* Match the required =>. */
8275 if (gfc_match (" =>") != MATCH_YES)
8277 gfc_error ("Expected '=>' at %C");
8281 /* Try to find existing GENERIC binding with this name / for this operator;
8282 if there is something, check that it is another GENERIC and then extend
8283 it rather than building a new node. Otherwise, create it and put it
8284 at the right position. */
8288 case INTERFACE_USER_OP:
8289 case INTERFACE_GENERIC:
8291 const bool is_op = (op_type == INTERFACE_USER_OP);
8294 st = gfc_find_symtree (is_op ? ns->tb_uop_root : ns->tb_sym_root, name);
8306 case INTERFACE_INTRINSIC_OP:
8316 if (!tb->is_generic)
8318 gcc_assert (op_type == INTERFACE_GENERIC);
8319 gfc_error ("There's already a non-generic procedure with binding name"
8320 " '%s' for the derived type '%s' at %C",
8321 bind_name, block->name);
8325 if (tb->access != tbattr.access)
8327 gfc_error ("Binding at %C must have the same access as already"
8328 " defined binding '%s'", bind_name);
8334 tb = gfc_get_typebound_proc (NULL);
8335 tb->where = gfc_current_locus;
8336 tb->access = tbattr.access;
8338 tb->u.generic = NULL;
8342 case INTERFACE_GENERIC:
8343 case INTERFACE_USER_OP:
8345 const bool is_op = (op_type == INTERFACE_USER_OP);
8348 st = gfc_new_symtree (is_op ? &ns->tb_uop_root : &ns->tb_sym_root,
8356 case INTERFACE_INTRINSIC_OP:
8365 /* Now, match all following names as specific targets. */
8368 gfc_symtree* target_st;
8369 gfc_tbp_generic* target;
8371 m = gfc_match_name (name);
8372 if (m == MATCH_ERROR)
8376 gfc_error ("Expected specific binding name at %C");
8380 target_st = gfc_get_tbp_symtree (&ns->tb_sym_root, name);
8382 /* See if this is a duplicate specification. */
8383 for (target = tb->u.generic; target; target = target->next)
8384 if (target_st == target->specific_st)
8386 gfc_error ("'%s' already defined as specific binding for the"
8387 " generic '%s' at %C", name, bind_name);
8391 target = gfc_get_tbp_generic ();
8392 target->specific_st = target_st;
8393 target->specific = NULL;
8394 target->next = tb->u.generic;
8395 target->is_operator = ((op_type == INTERFACE_USER_OP)
8396 || (op_type == INTERFACE_INTRINSIC_OP));
8397 tb->u.generic = target;
8399 while (gfc_match (" ,") == MATCH_YES);
8401 /* Here should be the end. */
8402 if (gfc_match_eos () != MATCH_YES)
8404 gfc_error ("Junk after GENERIC binding at %C");
8415 /* Match a FINAL declaration inside a derived type. */
8418 gfc_match_final_decl (void)
8420 char name[GFC_MAX_SYMBOL_LEN + 1];
8423 gfc_namespace* module_ns;
8427 if (gfc_current_form == FORM_FREE)
8429 char c = gfc_peek_ascii_char ();
8430 if (!gfc_is_whitespace (c) && c != ':')
8434 if (gfc_state_stack->state != COMP_DERIVED_CONTAINS)
8436 if (gfc_current_form == FORM_FIXED)
8439 gfc_error ("FINAL declaration at %C must be inside a derived type "
8440 "CONTAINS section");
8444 block = gfc_state_stack->previous->sym;
8447 if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous
8448 || gfc_state_stack->previous->previous->state != COMP_MODULE)
8450 gfc_error ("Derived type declaration with FINAL at %C must be in the"
8451 " specification part of a MODULE");
8455 module_ns = gfc_current_ns;
8456 gcc_assert (module_ns);
8457 gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE);
8459 /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */
8460 if (gfc_match (" ::") == MATCH_ERROR)
8463 /* Match the sequence of procedure names. */
8470 if (first && gfc_match_eos () == MATCH_YES)
8472 gfc_error ("Empty FINAL at %C");
8476 m = gfc_match_name (name);
8479 gfc_error ("Expected module procedure name at %C");
8482 else if (m != MATCH_YES)
8485 if (gfc_match_eos () == MATCH_YES)
8487 if (!last && gfc_match_char (',') != MATCH_YES)
8489 gfc_error ("Expected ',' at %C");
8493 if (gfc_get_symbol (name, module_ns, &sym))
8495 gfc_error ("Unknown procedure name \"%s\" at %C", name);
8499 /* Mark the symbol as module procedure. */
8500 if (sym->attr.proc != PROC_MODULE
8501 && gfc_add_procedure (&sym->attr, PROC_MODULE,
8502 sym->name, NULL) == FAILURE)
8505 /* Check if we already have this symbol in the list, this is an error. */
8506 for (f = block->f2k_derived->finalizers; f; f = f->next)
8507 if (f->proc_sym == sym)
8509 gfc_error ("'%s' at %C is already defined as FINAL procedure!",
8514 /* Add this symbol to the list of finalizers. */
8515 gcc_assert (block->f2k_derived);
8517 f = XCNEW (gfc_finalizer);
8519 f->proc_tree = NULL;
8520 f->where = gfc_current_locus;
8521 f->next = block->f2k_derived->finalizers;
8522 block->f2k_derived->finalizers = f;
8532 const ext_attr_t ext_attr_list[] = {
8533 { "dllimport", EXT_ATTR_DLLIMPORT, "dllimport" },
8534 { "dllexport", EXT_ATTR_DLLEXPORT, "dllexport" },
8535 { "cdecl", EXT_ATTR_CDECL, "cdecl" },
8536 { "stdcall", EXT_ATTR_STDCALL, "stdcall" },
8537 { "fastcall", EXT_ATTR_FASTCALL, "fastcall" },
8538 { NULL, EXT_ATTR_LAST, NULL }
8541 /* Match a !GCC$ ATTRIBUTES statement of the form:
8542 !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ...
8543 When we come here, we have already matched the !GCC$ ATTRIBUTES string.
8545 TODO: We should support all GCC attributes using the same syntax for
8546 the attribute list, i.e. the list in C
8547 __attributes(( attribute-list ))
8549 !GCC$ ATTRIBUTES attribute-list ::
8550 Cf. c-parser.c's c_parser_attributes; the data can then directly be
8553 As there is absolutely no risk of confusion, we should never return
8556 gfc_match_gcc_attributes (void)
8558 symbol_attribute attr;
8559 char name[GFC_MAX_SYMBOL_LEN + 1];
8564 gfc_clear_attr (&attr);
8569 if (gfc_match_name (name) != MATCH_YES)
8572 for (id = 0; id < EXT_ATTR_LAST; id++)
8573 if (strcmp (name, ext_attr_list[id].name) == 0)
8576 if (id == EXT_ATTR_LAST)
8578 gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C");
8582 if (gfc_add_ext_attribute (&attr, (ext_attr_id_t) id, &gfc_current_locus)
8586 gfc_gobble_whitespace ();
8587 ch = gfc_next_ascii_char ();
8590 /* This is the successful exit condition for the loop. */
8591 if (gfc_next_ascii_char () == ':')
8601 if (gfc_match_eos () == MATCH_YES)
8606 m = gfc_match_name (name);
8610 if (find_special (name, &sym, true))
8613 sym->attr.ext_attr |= attr.ext_attr;
8615 if (gfc_match_eos () == MATCH_YES)
8618 if (gfc_match_char (',') != MATCH_YES)
8625 gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C");