/* Matching subroutines in all sizes, shapes and colors.
- Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- Free Software Foundation, Inc.
+ Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
+ 2009, 2010
+ 2010 Free Software Foundation, Inc.
Contributed by Andy Vaught
This file is part of GCC.
#include "match.h"
#include "parse.h"
+int gfc_matching_ptr_assignment = 0;
int gfc_matching_procptr_assignment = 0;
bool gfc_matching_prefix = false;
+/* Stack of SELECT TYPE statements. */
+gfc_select_type_stack *select_type_stack = NULL;
+
/* For debugging and diagnostic purposes. Return the textual representation
of the intrinsic operator OP. */
const char *
locus start;
match m;
+ e1 = e2 = e3 = NULL;
+
/* Match the start of an iterator without affecting the symbol table. */
start = gfc_current_locus;
if (m != MATCH_YES)
return MATCH_NO;
- gfc_match_char ('=');
-
- e1 = e2 = e3 = NULL;
-
- if (var->ref != NULL)
+ /* F2008, C617 & C565. */
+ if (var->symtree->n.sym->attr.codimension)
{
- gfc_error ("Loop variable at %C cannot be a sub-component");
+ gfc_error ("Loop variable at %C cannot be a coarray");
goto cleanup;
}
- if (var->symtree->n.sym->attr.intent == INTENT_IN)
+ if (var->ref != NULL)
{
- gfc_error ("Loop variable '%s' at %C cannot be INTENT(IN)",
- var->symtree->n.sym->name);
+ gfc_error ("Loop variable at %C cannot be a sub-component");
goto cleanup;
}
+ gfc_match_char ('=');
+
var->symtree->n.sym->attr.implied_index = 1;
m = init_flag ? gfc_match_init_expr (&e1) : gfc_match_expr (&e1);
if (gfc_match_char (',') != MATCH_YES)
{
- e3 = gfc_int_expr (1);
+ e3 = gfc_get_int_expr (gfc_default_integer_kind, NULL, 1);
goto done;
}
old_loc = gfc_current_locus;
lvalue = rvalue = NULL;
+ gfc_matching_ptr_assignment = 0;
gfc_matching_procptr_assignment = 0;
m = gfc_match (" %v =>", &lvalue);
if (lvalue->symtree->n.sym->attr.proc_pointer
|| gfc_is_proc_ptr_comp (lvalue, NULL))
gfc_matching_procptr_assignment = 1;
+ else
+ gfc_matching_ptr_assignment = 1;
m = gfc_match (" %e%t", &rvalue);
+ gfc_matching_ptr_assignment = 0;
gfc_matching_procptr_assignment = 0;
if (m != MATCH_YES)
goto cleanup;
match ("cycle", gfc_match_cycle, ST_CYCLE)
match ("deallocate", gfc_match_deallocate, ST_DEALLOCATE)
match ("end file", gfc_match_endfile, ST_END_FILE)
+ match ("error stop", gfc_match_error_stop, ST_ERROR_STOP)
match ("exit", gfc_match_exit, ST_EXIT)
match ("flush", gfc_match_flush, ST_FLUSH)
match ("forall", match_simple_forall, ST_FORALL)
match ("rewind", gfc_match_rewind, ST_REWIND)
match ("stop", gfc_match_stop, ST_STOP)
match ("wait", gfc_match_wait, ST_WAIT)
+ match ("sync all", gfc_match_sync_all, ST_SYNC_CALL);
+ match ("sync images", gfc_match_sync_images, ST_SYNC_IMAGES);
+ match ("sync memory", gfc_match_sync_memory, ST_SYNC_MEMORY);
match ("where", match_simple_where, ST_WHERE)
match ("write", gfc_match_write, ST_WRITE)
}
+/* Match a CRITICAL statement. */
+match
+gfc_match_critical (void)
+{
+ gfc_st_label *label = NULL;
+
+ if (gfc_match_label () == MATCH_ERROR)
+ return MATCH_ERROR;
+
+ if (gfc_match (" critical") != MATCH_YES)
+ return MATCH_NO;
+
+ if (gfc_match_st_label (&label) == MATCH_ERROR)
+ return MATCH_ERROR;
+
+ if (gfc_match_eos () != MATCH_YES)
+ {
+ gfc_syntax_error (ST_CRITICAL);
+ return MATCH_ERROR;
+ }
+
+ if (gfc_pure (NULL))
+ {
+ gfc_error ("Image control statement CRITICAL at %C in PURE procedure");
+ return MATCH_ERROR;
+ }
+
+ if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: CRITICAL statement at %C")
+ == FAILURE)
+ return MATCH_ERROR;
+
+ if (gfc_option.coarray == GFC_FCOARRAY_NONE)
+ {
+ gfc_fatal_error ("Coarrays disabled at %C, use -fcoarray= to enable");
+ return MATCH_ERROR;
+ }
+
+ if (gfc_find_state (COMP_CRITICAL) == SUCCESS)
+ {
+ gfc_error ("Nested CRITICAL block at %C");
+ return MATCH_ERROR;
+ }
+
+ new_st.op = EXEC_CRITICAL;
+
+ if (label != NULL
+ && gfc_reference_st_label (label, ST_LABEL_TARGET) == FAILURE)
+ return MATCH_ERROR;
+
+ return MATCH_YES;
+}
+
+
+/* Match a BLOCK statement. */
+
+match
+gfc_match_block (void)
+{
+ match m;
+
+ if (gfc_match_label () == MATCH_ERROR)
+ return MATCH_ERROR;
+
+ if (gfc_match (" block") != MATCH_YES)
+ return MATCH_NO;
+
+ /* For this to be a correct BLOCK statement, the line must end now. */
+ m = gfc_match_eos ();
+ if (m == MATCH_ERROR)
+ return MATCH_ERROR;
+ if (m == MATCH_NO)
+ return MATCH_NO;
+
+ return MATCH_YES;
+}
+
+
+/* Match an ASSOCIATE statement. */
+
+match
+gfc_match_associate (void)
+{
+ if (gfc_match_label () == MATCH_ERROR)
+ return MATCH_ERROR;
+
+ if (gfc_match (" associate") != MATCH_YES)
+ return MATCH_NO;
+
+ /* Match the association list. */
+ if (gfc_match_char ('(') != MATCH_YES)
+ {
+ gfc_error ("Expected association list at %C");
+ return MATCH_ERROR;
+ }
+ new_st.ext.block.assoc = NULL;
+ while (true)
+ {
+ gfc_association_list* newAssoc = gfc_get_association_list ();
+ gfc_association_list* a;
+
+ /* Match the next association. */
+ if (gfc_match (" %n => %e", newAssoc->name, &newAssoc->target)
+ != MATCH_YES)
+ {
+ gfc_error ("Expected association at %C");
+ goto assocListError;
+ }
+ newAssoc->where = gfc_current_locus;
+
+ /* Check that the current name is not yet in the list. */
+ for (a = new_st.ext.block.assoc; a; a = a->next)
+ if (!strcmp (a->name, newAssoc->name))
+ {
+ gfc_error ("Duplicate name '%s' in association at %C",
+ newAssoc->name);
+ goto assocListError;
+ }
+
+ /* The target expression must not be coindexed. */
+ if (gfc_is_coindexed (newAssoc->target))
+ {
+ gfc_error ("Association target at %C must not be coindexed");
+ goto assocListError;
+ }
+
+ /* The `variable' field is left blank for now; because the target is not
+ yet resolved, we can't use gfc_has_vector_subscript to determine it
+ for now. This is set during resolution. */
+
+ /* Put it into the list. */
+ newAssoc->next = new_st.ext.block.assoc;
+ new_st.ext.block.assoc = newAssoc;
+
+ /* Try next one or end if closing parenthesis is found. */
+ gfc_gobble_whitespace ();
+ if (gfc_peek_char () == ')')
+ break;
+ if (gfc_match_char (',') != MATCH_YES)
+ {
+ gfc_error ("Expected ')' or ',' at %C");
+ return MATCH_ERROR;
+ }
+
+ continue;
+
+assocListError:
+ gfc_free (newAssoc);
+ goto error;
+ }
+ if (gfc_match_char (')') != MATCH_YES)
+ {
+ /* This should never happen as we peek above. */
+ gcc_unreachable ();
+ }
+
+ if (gfc_match_eos () != MATCH_YES)
+ {
+ gfc_error ("Junk after ASSOCIATE statement at %C");
+ goto error;
+ }
+
+ return MATCH_YES;
+
+error:
+ gfc_free_association_list (new_st.ext.block.assoc);
+ return MATCH_ERROR;
+}
+
+
/* Match a DO statement. */
match
if (gfc_match_eos () == MATCH_YES)
{
- iter.end = gfc_logical_expr (1, NULL);
+ iter.end = gfc_get_logical_expr (gfc_default_logical_kind, NULL, true);
new_st.op = EXEC_DO_WHILE;
goto done;
}
gfc_state_data *p, *o;
gfc_symbol *sym;
match m;
+ int cnt;
if (gfc_match_eos () == MATCH_YES)
sym = NULL;
else
{
- m = gfc_match ("% %s%t", &sym);
+ char name[GFC_MAX_SYMBOL_LEN + 1];
+ gfc_symtree* stree;
+
+ m = gfc_match ("% %n%t", name);
if (m == MATCH_ERROR)
return MATCH_ERROR;
if (m == MATCH_NO)
return MATCH_ERROR;
}
+ /* Find the corresponding symbol. If there's a BLOCK statement
+ between here and the label, it is not in gfc_current_ns but a parent
+ namespace! */
+ stree = gfc_find_symtree_in_proc (name, gfc_current_ns);
+ if (!stree)
+ {
+ gfc_error ("Name '%s' in %s statement at %C is unknown",
+ name, gfc_ascii_statement (st));
+ return MATCH_ERROR;
+ }
+
+ sym = stree->n.sym;
if (sym->attr.flavor != FL_LABEL)
{
- gfc_error ("Name '%s' in %s statement at %C is not a loop name",
- sym->name, gfc_ascii_statement (st));
+ gfc_error ("Name '%s' in %s statement at %C is not a construct name",
+ name, gfc_ascii_statement (st));
return MATCH_ERROR;
}
}
- /* Find the loop mentioned specified by the label (or lack of a label). */
+ /* Find the loop specified by the label (or lack of a label). */
for (o = NULL, p = gfc_state_stack; p; p = p->previous)
- if (p->state == COMP_DO && (sym == NULL || sym == p->sym))
- break;
- else if (o == NULL && p->state == COMP_OMP_STRUCTURED_BLOCK)
+ if (o == NULL && p->state == COMP_OMP_STRUCTURED_BLOCK)
o = p;
+ else if (p->state == COMP_CRITICAL)
+ {
+ gfc_error("%s statement at %C leaves CRITICAL construct",
+ gfc_ascii_statement (st));
+ return MATCH_ERROR;
+ }
+ else if ((sym && sym == p->sym) || (!sym && p->state == COMP_DO))
+ break;
if (p == NULL)
{
if (sym == NULL)
- gfc_error ("%s statement at %C is not within a loop",
+ gfc_error ("%s statement at %C is not within a construct",
gfc_ascii_statement (st));
else
- gfc_error ("%s statement at %C is not within loop '%s'",
+ gfc_error ("%s statement at %C is not within construct '%s'",
gfc_ascii_statement (st), sym->name);
return MATCH_ERROR;
}
+ /* Special checks for EXIT from non-loop constructs. */
+ switch (p->state)
+ {
+ case COMP_DO:
+ break;
+
+ case COMP_CRITICAL:
+ /* This is already handled above. */
+ gcc_unreachable ();
+
+ case COMP_ASSOCIATE:
+ case COMP_BLOCK:
+ case COMP_IF:
+ case COMP_SELECT:
+ case COMP_SELECT_TYPE:
+ gcc_assert (sym);
+ if (op == EXEC_CYCLE)
+ {
+ gfc_error ("CYCLE statement at %C is not applicable to non-loop"
+ " construct '%s'", sym->name);
+ return MATCH_ERROR;
+ }
+ gcc_assert (op == EXEC_EXIT);
+ if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: EXIT statement with no"
+ " do-construct-name at %C") == FAILURE)
+ return MATCH_ERROR;
+ break;
+
+ default:
+ gfc_error ("%s statement at %C is not applicable to construct '%s'",
+ gfc_ascii_statement (st), sym->name);
+ return MATCH_ERROR;
+ }
+
if (o != NULL)
{
gfc_error ("%s statement at %C leaving OpenMP structured block",
gfc_ascii_statement (st));
return MATCH_ERROR;
}
- else if (st == ST_EXIT
- && p->previous != NULL
- && p->previous->state == COMP_OMP_STRUCTURED_BLOCK
- && (p->previous->head->op == EXEC_OMP_DO
- || p->previous->head->op == EXEC_OMP_PARALLEL_DO))
+
+ for (o = p, cnt = 0; o->state == COMP_DO && o->previous != NULL; cnt++)
+ o = o->previous;
+ if (cnt > 0
+ && o != NULL
+ && o->state == COMP_OMP_STRUCTURED_BLOCK
+ && (o->head->op == EXEC_OMP_DO
+ || o->head->op == EXEC_OMP_PARALLEL_DO))
{
- gcc_assert (p->previous->head->next != NULL);
- gcc_assert (p->previous->head->next->op == EXEC_DO
- || p->previous->head->next->op == EXEC_DO_WHILE);
- gfc_error ("EXIT statement at %C terminating !$OMP DO loop");
- return MATCH_ERROR;
+ int collapse = 1;
+ gcc_assert (o->head->next != NULL
+ && (o->head->next->op == EXEC_DO
+ || o->head->next->op == EXEC_DO_WHILE)
+ && o->previous != NULL
+ && o->previous->tail->op == o->head->op);
+ if (o->previous->tail->ext.omp_clauses != NULL
+ && o->previous->tail->ext.omp_clauses->collapse > 1)
+ collapse = o->previous->tail->ext.omp_clauses->collapse;
+ if (st == ST_EXIT && cnt <= collapse)
+ {
+ gfc_error ("EXIT statement at %C terminating !$OMP DO loop");
+ return MATCH_ERROR;
+ }
+ if (st == ST_CYCLE && cnt < collapse)
+ {
+ gfc_error ("CYCLE statement at %C to non-innermost collapsed"
+ " !$OMP DO loop");
+ return MATCH_ERROR;
+ }
}
- /* Save the first statement in the loop - needed by the backend. */
- new_st.ext.whichloop = p->head;
+ /* Save the first statement in the construct - needed by the backend. */
+ new_st.ext.which_construct = p->construct;
new_st.op = op;
}
-/* Match a number or character constant after a STOP or PAUSE statement. */
+/* Match a number or character constant after an (ALL) STOP or PAUSE statement. */
static match
gfc_match_stopcode (gfc_statement st)
{
- int stop_code;
gfc_expr *e;
match m;
- int cnt;
- stop_code = -1;
e = NULL;
if (gfc_match_eos () != MATCH_YES)
{
- m = gfc_match_small_literal_int (&stop_code, &cnt);
+ m = gfc_match_init_expr (&e);
if (m == MATCH_ERROR)
goto cleanup;
-
- if (m == MATCH_YES && cnt > 5)
- {
- gfc_error ("Too many digits in STOP code at %C");
- goto cleanup;
- }
-
if (m == MATCH_NO)
- {
- /* Try a character constant. */
- m = gfc_match_expr (&e);
- if (m == MATCH_ERROR)
- goto cleanup;
- if (m == MATCH_NO)
- goto syntax;
- if (e->ts.type != BT_CHARACTER || e->expr_type != EXPR_CONSTANT)
- goto syntax;
- }
+ goto syntax;
if (gfc_match_eos () != MATCH_YES)
goto syntax;
goto cleanup;
}
- new_st.op = st == ST_STOP ? EXEC_STOP : EXEC_PAUSE;
+ if (st == ST_STOP && gfc_find_state (COMP_CRITICAL) == SUCCESS)
+ {
+ gfc_error ("Image control statement STOP at %C in CRITICAL block");
+ goto cleanup;
+ }
+
+ if (e != NULL)
+ {
+ if (!(e->ts.type == BT_CHARACTER || e->ts.type == BT_INTEGER))
+ {
+ gfc_error ("STOP code at %L must be either INTEGER or CHARACTER type",
+ &e->where);
+ goto cleanup;
+ }
+
+ if (e->rank != 0)
+ {
+ gfc_error ("STOP code at %L must be scalar",
+ &e->where);
+ goto cleanup;
+ }
+
+ if (e->ts.type == BT_CHARACTER
+ && e->ts.kind != gfc_default_character_kind)
+ {
+ gfc_error ("STOP code at %L must be default character KIND=%d",
+ &e->where, (int) gfc_default_character_kind);
+ goto cleanup;
+ }
+
+ if (e->ts.type == BT_INTEGER
+ && e->ts.kind != gfc_default_integer_kind)
+ {
+ gfc_error ("STOP code at %L must be default integer KIND=%d",
+ &e->where, (int) gfc_default_integer_kind);
+ goto cleanup;
+ }
+ }
+
+ switch (st)
+ {
+ case ST_STOP:
+ new_st.op = EXEC_STOP;
+ break;
+ case ST_ERROR_STOP:
+ new_st.op = EXEC_ERROR_STOP;
+ break;
+ case ST_PAUSE:
+ new_st.op = EXEC_PAUSE;
+ break;
+ default:
+ gcc_unreachable ();
+ }
+
new_st.expr1 = e;
- new_st.ext.stop_code = stop_code;
+ new_st.ext.stop_code = -1;
return MATCH_YES;
}
-/* Match a CONTINUE statement. */
+/* Match the ERROR STOP statement. */
match
-gfc_match_continue (void)
+gfc_match_error_stop (void)
{
- if (gfc_match_eos () != MATCH_YES)
- {
- gfc_syntax_error (ST_CONTINUE);
- return MATCH_ERROR;
- }
+ if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: ERROR STOP statement at %C")
+ == FAILURE)
+ return MATCH_ERROR;
- new_st.op = EXEC_CONTINUE;
- return MATCH_YES;
+ return gfc_match_stopcode (ST_ERROR_STOP);
}
-/* Match the (deprecated) ASSIGN statement. */
+/* Match SYNC ALL/IMAGES/MEMORY statement. Syntax:
+ SYNC ALL [(sync-stat-list)]
+ SYNC MEMORY [(sync-stat-list)]
+ SYNC IMAGES (image-set [, sync-stat-list] )
+ with sync-stat is int-expr or *. */
-match
-gfc_match_assign (void)
+static match
+sync_statement (gfc_statement st)
{
- gfc_expr *expr;
- gfc_st_label *label;
-
- if (gfc_match (" %l", &label) == MATCH_YES)
- {
- if (gfc_reference_st_label (label, ST_LABEL_UNKNOWN) == FAILURE)
- return MATCH_ERROR;
- if (gfc_match (" to %v%t", &expr) == MATCH_YES)
- {
- if (gfc_notify_std (GFC_STD_F95_DEL, "Deleted feature: ASSIGN "
- "statement at %C")
- == FAILURE)
- return MATCH_ERROR;
+ match m;
+ gfc_expr *tmp, *imageset, *stat, *errmsg;
+ bool saw_stat, saw_errmsg;
- expr->symtree->n.sym->attr.assign = 1;
+ tmp = imageset = stat = errmsg = NULL;
+ saw_stat = saw_errmsg = false;
- new_st.op = EXEC_LABEL_ASSIGN;
- new_st.label1 = label;
- new_st.expr1 = expr;
- return MATCH_YES;
- }
+ if (gfc_pure (NULL))
+ {
+ gfc_error ("Image control statement SYNC at %C in PURE procedure");
+ return MATCH_ERROR;
}
- return MATCH_NO;
-}
+ if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: SYNC statement at %C")
+ == FAILURE)
+ return MATCH_ERROR;
-/* Match the GO TO statement. As a computed GOTO statement is
- matched, it is transformed into an equivalent SELECT block. No
- tree is necessary, and the resulting jumps-to-jumps are
- specifically optimized away by the back end. */
-
-match
-gfc_match_goto (void)
-{
- gfc_code *head, *tail;
- gfc_expr *expr;
- gfc_case *cp;
- gfc_st_label *label;
- int i;
- match m;
-
- if (gfc_match (" %l%t", &label) == MATCH_YES)
+ if (gfc_option.coarray == GFC_FCOARRAY_NONE)
{
- if (gfc_reference_st_label (label, ST_LABEL_TARGET) == FAILURE)
- return MATCH_ERROR;
-
- new_st.op = EXEC_GOTO;
- new_st.label1 = label;
- return MATCH_YES;
+ gfc_fatal_error ("Coarrays disabled at %C, use -fcoarray= to enable");
+ return MATCH_ERROR;
}
- /* The assigned GO TO statement. */
+ if (gfc_find_state (COMP_CRITICAL) == SUCCESS)
+ {
+ gfc_error ("Image control statement SYNC at %C in CRITICAL block");
+ return MATCH_ERROR;
+ }
+
+ if (gfc_match_eos () == MATCH_YES)
+ {
+ if (st == ST_SYNC_IMAGES)
+ goto syntax;
+ goto done;
+ }
+
+ if (gfc_match_char ('(') != MATCH_YES)
+ goto syntax;
+
+ if (st == ST_SYNC_IMAGES)
+ {
+ /* Denote '*' as imageset == NULL. */
+ m = gfc_match_char ('*');
+ if (m == MATCH_ERROR)
+ goto syntax;
+ if (m == MATCH_NO)
+ {
+ if (gfc_match ("%e", &imageset) != MATCH_YES)
+ goto syntax;
+ }
+ m = gfc_match_char (',');
+ if (m == MATCH_ERROR)
+ goto syntax;
+ if (m == MATCH_NO)
+ {
+ m = gfc_match_char (')');
+ if (m == MATCH_YES)
+ goto done;
+ goto syntax;
+ }
+ }
+
+ for (;;)
+ {
+ m = gfc_match (" stat = %v", &tmp);
+ if (m == MATCH_ERROR)
+ goto syntax;
+ if (m == MATCH_YES)
+ {
+ if (saw_stat)
+ {
+ gfc_error ("Redundant STAT tag found at %L ", &tmp->where);
+ goto cleanup;
+ }
+ stat = tmp;
+ saw_stat = true;
+
+ if (gfc_match_char (',') == MATCH_YES)
+ continue;
+ }
+
+ m = gfc_match (" errmsg = %v", &tmp);
+ if (m == MATCH_ERROR)
+ goto syntax;
+ if (m == MATCH_YES)
+ {
+ if (saw_errmsg)
+ {
+ gfc_error ("Redundant ERRMSG tag found at %L ", &tmp->where);
+ goto cleanup;
+ }
+ errmsg = tmp;
+ saw_errmsg = true;
+
+ if (gfc_match_char (',') == MATCH_YES)
+ continue;
+ }
+
+ gfc_gobble_whitespace ();
+
+ if (gfc_peek_char () == ')')
+ break;
+
+ goto syntax;
+ }
+
+ if (gfc_match (" )%t") != MATCH_YES)
+ goto syntax;
+
+done:
+ switch (st)
+ {
+ case ST_SYNC_ALL:
+ new_st.op = EXEC_SYNC_ALL;
+ break;
+ case ST_SYNC_IMAGES:
+ new_st.op = EXEC_SYNC_IMAGES;
+ break;
+ case ST_SYNC_MEMORY:
+ new_st.op = EXEC_SYNC_MEMORY;
+ break;
+ default:
+ gcc_unreachable ();
+ }
+
+ new_st.expr1 = imageset;
+ new_st.expr2 = stat;
+ new_st.expr3 = errmsg;
+
+ return MATCH_YES;
+
+syntax:
+ gfc_syntax_error (st);
+
+cleanup:
+ gfc_free_expr (tmp);
+ gfc_free_expr (imageset);
+ gfc_free_expr (stat);
+ gfc_free_expr (errmsg);
+
+ return MATCH_ERROR;
+}
+
+
+/* Match SYNC ALL statement. */
+
+match
+gfc_match_sync_all (void)
+{
+ return sync_statement (ST_SYNC_ALL);
+}
+
+
+/* Match SYNC IMAGES statement. */
+
+match
+gfc_match_sync_images (void)
+{
+ return sync_statement (ST_SYNC_IMAGES);
+}
+
+
+/* Match SYNC MEMORY statement. */
+
+match
+gfc_match_sync_memory (void)
+{
+ return sync_statement (ST_SYNC_MEMORY);
+}
+
+
+/* Match a CONTINUE statement. */
+
+match
+gfc_match_continue (void)
+{
+ if (gfc_match_eos () != MATCH_YES)
+ {
+ gfc_syntax_error (ST_CONTINUE);
+ return MATCH_ERROR;
+ }
+
+ new_st.op = EXEC_CONTINUE;
+ return MATCH_YES;
+}
+
+
+/* Match the (deprecated) ASSIGN statement. */
+
+match
+gfc_match_assign (void)
+{
+ gfc_expr *expr;
+ gfc_st_label *label;
+
+ if (gfc_match (" %l", &label) == MATCH_YES)
+ {
+ if (gfc_reference_st_label (label, ST_LABEL_UNKNOWN) == FAILURE)
+ return MATCH_ERROR;
+ if (gfc_match (" to %v%t", &expr) == MATCH_YES)
+ {
+ if (gfc_notify_std (GFC_STD_F95_DEL, "Deleted feature: ASSIGN "
+ "statement at %C")
+ == FAILURE)
+ return MATCH_ERROR;
+
+ expr->symtree->n.sym->attr.assign = 1;
+
+ new_st.op = EXEC_LABEL_ASSIGN;
+ new_st.label1 = label;
+ new_st.expr1 = expr;
+ return MATCH_YES;
+ }
+ }
+ return MATCH_NO;
+}
+
+
+/* Match the GO TO statement. As a computed GOTO statement is
+ matched, it is transformed into an equivalent SELECT block. No
+ tree is necessary, and the resulting jumps-to-jumps are
+ specifically optimized away by the back end. */
+
+match
+gfc_match_goto (void)
+{
+ gfc_code *head, *tail;
+ gfc_expr *expr;
+ gfc_case *cp;
+ gfc_st_label *label;
+ int i;
+ match m;
+
+ if (gfc_match (" %l%t", &label) == MATCH_YES)
+ {
+ if (gfc_reference_st_label (label, ST_LABEL_TARGET) == FAILURE)
+ return MATCH_ERROR;
+
+ new_st.op = EXEC_GOTO;
+ new_st.label1 = label;
+ return MATCH_YES;
+ }
+
+ /* The assigned GO TO statement. */
if (gfc_match_variable (&expr, 0) == MATCH_YES)
{
}
cp = gfc_get_case ();
- cp->low = cp->high = gfc_int_expr (i++);
+ cp->low = cp->high = gfc_get_int_expr (gfc_default_integer_kind,
+ NULL, i++);
tail->op = EXEC_SELECT;
tail->ext.case_list = cp;
}
-/* Match a Fortran 2003 intrinsic-type-spec. This is a stripped
- down version of gfc_match_type_spec() from decl.c. It only includes
- the intrinsic types from the Fortran 2003 standard. Thus, neither
- BYTE nor forms like REAL*4 are allowed. Additionally, the implicit_flag
- is not needed, so it was removed. The handling of derived types has
- been removed and no notion of the gfc_matching_function state
- is needed. In short, this functions matches only standard conforming
- intrinsic-type-spec (R403). */
+/* Match a Fortran 2003 derived-type-spec (F03:R455), which is just the name of
+ an accessible derived type. */
static match
-match_intrinsic_typespec (gfc_typespec *ts)
+match_derived_type_spec (gfc_typespec *ts)
+{
+ char name[GFC_MAX_SYMBOL_LEN + 1];
+ locus old_locus;
+ gfc_symbol *derived;
+
+ old_locus = gfc_current_locus;
+
+ if (gfc_match ("%n", name) != MATCH_YES)
+ {
+ gfc_current_locus = old_locus;
+ return MATCH_NO;
+ }
+
+ gfc_find_symbol (name, NULL, 1, &derived);
+
+ if (derived && derived->attr.flavor == FL_DERIVED)
+ {
+ ts->type = BT_DERIVED;
+ ts->u.derived = derived;
+ return MATCH_YES;
+ }
+
+ gfc_current_locus = old_locus;
+ return MATCH_NO;
+}
+
+
+/* Match a Fortran 2003 type-spec (F03:R401). This is similar to
+ gfc_match_decl_type_spec() from decl.c, with the following exceptions:
+ It only includes the intrinsic types from the Fortran 2003 standard
+ (thus, neither BYTE nor forms like REAL*4 are allowed). Additionally,
+ the implicit_flag is not needed, so it was removed. Derived types are
+ identified by their name alone. */
+
+static match
+match_type_spec (gfc_typespec *ts)
{
match m;
+ locus old_locus;
gfc_clear_ts (ts);
+ gfc_gobble_whitespace ();
+ old_locus = gfc_current_locus;
+
+ if (match_derived_type_spec (ts) == MATCH_YES)
+ {
+ /* Enforce F03:C401. */
+ if (ts->u.derived->attr.abstract)
+ {
+ gfc_error ("Derived type '%s' at %L may not be ABSTRACT",
+ ts->u.derived->name, &old_locus);
+ return MATCH_ERROR;
+ }
+ return MATCH_YES;
+ }
if (gfc_match ("integer") == MATCH_YES)
{
if (gfc_match ("character") == MATCH_YES)
{
ts->type = BT_CHARACTER;
- goto char_selector;
+
+ m = gfc_match_char_spec (ts);
+
+ if (m == MATCH_NO)
+ m = MATCH_YES;
+
+ return m;
}
if (gfc_match ("logical") == MATCH_YES)
goto kind_selector;
}
- /* If an intrinsic type is not matched, simply return MATCH_NO. */
+ /* If a type is not matched, simply return MATCH_NO. */
+ gfc_current_locus = old_locus;
return MATCH_NO;
kind_selector:
m = MATCH_YES; /* No kind specifier found. */
return m;
-
-char_selector:
-
- m = gfc_match_char_spec (ts);
-
- if (m == MATCH_NO)
- m = MATCH_YES; /* No kind specifier found. */
-
- return m;
-}
-
-
-/* Used in gfc_match_allocate to check that a allocation-object and
- a source-expr are conformable. This does not catch all possible
- cases; in particular a runtime checking is needed. */
-
-static gfc_try
-conformable_arrays (gfc_expr *e1, gfc_expr *e2)
-{
- /* First compare rank. */
- if (e2->ref && e1->rank != e2->ref->u.ar.as->rank)
- {
- gfc_error ("Source-expr at %L must be scalar or have the "
- "same rank as the allocate-object at %L",
- &e1->where, &e2->where);
- return FAILURE;
- }
-
- if (e1->shape)
- {
- int i;
- mpz_t s;
-
- mpz_init (s);
-
- for (i = 0; i < e1->rank; i++)
- {
- if (e2->ref->u.ar.end[i])
- {
- mpz_set (s, e2->ref->u.ar.end[i]->value.integer);
- mpz_sub (s, s, e2->ref->u.ar.start[i]->value.integer);
- mpz_add_ui (s, s, 1);
- }
- else
- {
- mpz_set (s, e2->ref->u.ar.start[i]->value.integer);
- }
-
- if (mpz_cmp (e1->shape[i], s) != 0)
- {
- gfc_error ("Source-expr at %L and allocate-object at %L must "
- "have the same shape", &e1->where, &e2->where);
- mpz_clear (s);
- return FAILURE;
- }
- }
-
- mpz_clear (s);
- }
-
- return SUCCESS;
}
gfc_match_allocate (void)
{
gfc_alloc *head, *tail;
- gfc_expr *stat, *errmsg, *tmp, *source;
+ gfc_expr *stat, *errmsg, *tmp, *source, *mold;
gfc_typespec ts;
+ gfc_symbol *sym;
match m;
- locus old_locus;
- bool saw_stat, saw_errmsg, saw_source, b1, b2, b3;
+ locus old_locus, deferred_locus;
+ bool saw_stat, saw_errmsg, saw_source, saw_mold, saw_deferred, b1, b2, b3;
head = tail = NULL;
- stat = errmsg = source = tmp = NULL;
- saw_stat = saw_errmsg = saw_source = false;
+ stat = errmsg = source = mold = tmp = NULL;
+ saw_stat = saw_errmsg = saw_source = saw_mold = saw_deferred = false;
if (gfc_match_char ('(') != MATCH_YES)
goto syntax;
- /* Match an optional intrinsic-type-spec. */
+ /* Match an optional type-spec. */
old_locus = gfc_current_locus;
- m = match_intrinsic_typespec (&ts);
+ m = match_type_spec (&ts);
if (m == MATCH_ERROR)
goto cleanup;
else if (m == MATCH_NO)
- ts.type = BT_UNKNOWN;
+ {
+ char name[GFC_MAX_SYMBOL_LEN + 3];
+
+ if (gfc_match ("%n :: ", name) == MATCH_YES)
+ {
+ gfc_error ("Error in type-spec at %L", &old_locus);
+ goto cleanup;
+ }
+
+ ts.type = BT_UNKNOWN;
+ }
else
{
if (gfc_match (" :: ") == MATCH_YES)
if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: typespec in "
"ALLOCATE at %L", &old_locus) == FAILURE)
goto cleanup;
+
+ if (ts.deferred)
+ {
+ gfc_error ("Type-spec at %L cannot contain a deferred "
+ "type parameter", &old_locus);
+ goto cleanup;
+ }
}
else
{
goto cleanup;
}
+ if (tail->expr->ts.deferred)
+ {
+ saw_deferred = true;
+ deferred_locus = tail->expr->where;
+ }
+
/* The ALLOCATE statement had an optional typespec. Check the
constraints. */
if (ts.type != BT_UNKNOWN)
{
- /* Enforce C626. */
- if (ts.type != tail->expr->ts.type)
+ /* Enforce F03:C624. */
+ if (!gfc_type_compatible (&tail->expr->ts, &ts))
{
gfc_error ("Type of entity at %L is type incompatible with "
"typespec", &tail->expr->where);
goto cleanup;
}
- /* Enforce C627. */
+ /* Enforce F03:C627. */
if (ts.kind != tail->expr->ts.kind)
{
gfc_error ("Kind type parameter for entity at %L differs from "
tail->expr->ts.u.derived = gfc_use_derived (tail->expr->ts.u.derived);
/* FIXME: disable the checking on derived types and arrays. */
+ sym = tail->expr->symtree->n.sym;
b1 = !(tail->expr->ref
&& (tail->expr->ref->type == REF_COMPONENT
|| tail->expr->ref->type == REF_ARRAY));
- b2 = tail->expr->symtree->n.sym
- && !(tail->expr->symtree->n.sym->attr.allocatable
- || tail->expr->symtree->n.sym->attr.pointer
- || tail->expr->symtree->n.sym->attr.proc_pointer);
- b3 = tail->expr->symtree->n.sym
- && tail->expr->symtree->n.sym->ns
- && tail->expr->symtree->n.sym->ns->proc_name
- && (tail->expr->symtree->n.sym->ns->proc_name->attr.allocatable
- || tail->expr->symtree->n.sym->ns->proc_name->attr.pointer
- || tail->expr->symtree->n.sym->ns->proc_name->attr.proc_pointer);
+ if (sym && sym->ts.type == BT_CLASS)
+ b2 = !(CLASS_DATA (sym)->attr.allocatable
+ || CLASS_DATA (sym)->attr.class_pointer);
+ else
+ b2 = sym && !(sym->attr.allocatable || sym->attr.pointer
+ || sym->attr.proc_pointer);
+ b3 = sym && sym->ns && sym->ns->proc_name
+ && (sym->ns->proc_name->attr.allocatable
+ || sym->ns->proc_name->attr.pointer
+ || sym->ns->proc_name->attr.proc_pointer);
if (b1 && b2 && !b3)
{
- gfc_error ("Allocate-object at %C is not a nonprocedure pointer "
- "or an allocatable variable");
+ gfc_error ("Allocate-object at %L is not a nonprocedure pointer "
+ "or an allocatable variable", &tail->expr->where);
+ goto cleanup;
+ }
+
+ if (gfc_peek_ascii_char () == '(' && !sym->attr.dimension)
+ {
+ gfc_error ("Shape specification for allocatable scalar at %C");
goto cleanup;
}
}
stat = tmp;
+ tmp = NULL;
saw_stat = true;
if (gfc_check_do_variable (stat->symtree))
}
errmsg = tmp;
+ tmp = NULL;
saw_errmsg = true;
if (gfc_match_char (',') == MATCH_YES)
goto cleanup;
}
- /* The next 3 conditionals check C631. */
+ /* The next 2 conditionals check C631. */
if (ts.type != BT_UNKNOWN)
{
gfc_error ("SOURCE tag at %L conflicts with the typespec at %L",
goto cleanup;
}
- gfc_resolve_expr (tmp);
+ source = tmp;
+ tmp = NULL;
+ saw_source = true;
+
+ if (gfc_match_char (',') == MATCH_YES)
+ goto alloc_opt_list;
+ }
- if (head->expr->ts.type != tmp->ts.type)
+ m = gfc_match (" mold = %e", &tmp);
+ if (m == MATCH_ERROR)
+ goto cleanup;
+ if (m == MATCH_YES)
+ {
+ if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: MOLD tag at %L",
+ &tmp->where) == FAILURE)
+ goto cleanup;
+
+ /* Check F08:C636. */
+ if (saw_mold)
{
- gfc_error ("Type of entity at %L is type incompatible with "
- "source-expr at %L", &head->expr->where, &tmp->where);
+ gfc_error ("Redundant MOLD tag found at %L ", &tmp->where);
goto cleanup;
}
-
- /* Check C633. */
- if (tmp->ts.kind != head->expr->ts.kind)
+
+ /* Check F08:C637. */
+ if (ts.type != BT_UNKNOWN)
{
- gfc_error ("The allocate-object at %L and the source-expr at %L "
- "shall have the same kind type parameter",
- &head->expr->where, &tmp->where);
+ gfc_error ("MOLD tag at %L conflicts with the typespec at %L",
+ &tmp->where, &old_locus);
goto cleanup;
}
- /* Check C632 and restriction following Note 6.18. */
- if (tmp->rank > 0 && conformable_arrays (tmp, head->expr) == FAILURE)
- goto cleanup;
-
- source = tmp;
- saw_source = true;
+ mold = tmp;
+ tmp = NULL;
+ saw_mold = true;
+ mold->mold = 1;
if (gfc_match_char (',') == MATCH_YES)
goto alloc_opt_list;
break;
}
-
if (gfc_match (" )%t") != MATCH_YES)
goto syntax;
+ /* Check F08:C637. */
+ if (source && mold)
+ {
+ gfc_error ("MOLD tag at %L conflicts with SOURCE tag at %L",
+ &mold->where, &source->where);
+ goto cleanup;
+ }
+
+ /* Check F03:C623, */
+ if (saw_deferred && ts.type == BT_UNKNOWN && !source)
+ {
+ gfc_error ("Allocate-object at %L with a deferred type parameter "
+ "requires either a type-spec or SOURCE tag", &deferred_locus);
+ goto cleanup;
+ }
+
new_st.op = EXEC_ALLOCATE;
new_st.expr1 = stat;
new_st.expr2 = errmsg;
- new_st.expr3 = source;
- new_st.ext.alloc_list = head;
+ if (source)
+ new_st.expr3 = source;
+ else
+ new_st.expr3 = mold;
+ new_st.ext.alloc.list = head;
+ new_st.ext.alloc.ts = ts;
return MATCH_YES;
gfc_free_expr (errmsg);
gfc_free_expr (source);
gfc_free_expr (stat);
- gfc_free_expr (tmp);
+ gfc_free_expr (mold);
+ if (tmp && tmp->expr_type) gfc_free_expr (tmp);
gfc_free_alloc_list (head);
return MATCH_ERROR;
}
if (gfc_check_do_variable (p->symtree))
goto cleanup;
- if (gfc_pure (NULL) && gfc_impure_variable (p->symtree->n.sym))
- {
- gfc_error ("Illegal variable in NULLIFY at %C for a PURE procedure");
- goto cleanup;
- }
-
/* build ' => NULL() '. */
- e = gfc_get_expr ();
- e->where = gfc_current_locus;
- e->expr_type = EXPR_NULL;
- e->ts.type = BT_UNKNOWN;
+ e = gfc_get_null_expr (&gfc_current_locus);
/* Chain to list. */
if (tail == NULL)
{
gfc_alloc *head, *tail;
gfc_expr *stat, *errmsg, *tmp;
+ gfc_symbol *sym;
match m;
- bool saw_stat, saw_errmsg;
+ bool saw_stat, saw_errmsg, b1, b2;
head = tail = NULL;
stat = errmsg = tmp = NULL;
if (gfc_check_do_variable (tail->expr->symtree))
goto cleanup;
- if (gfc_pure (NULL) && gfc_impure_variable (tail->expr->symtree->n.sym))
+ sym = tail->expr->symtree->n.sym;
+
+ if (gfc_pure (NULL) && gfc_impure_variable (sym))
{
gfc_error ("Illegal allocate-object at %C for a PURE procedure");
goto cleanup;
}
/* FIXME: disable the checking on derived types. */
- if (!(tail->expr->ref
+ b1 = !(tail->expr->ref
&& (tail->expr->ref->type == REF_COMPONENT
- || tail->expr->ref->type == REF_ARRAY))
- && tail->expr->symtree->n.sym
- && !(tail->expr->symtree->n.sym->attr.allocatable
- || tail->expr->symtree->n.sym->attr.pointer
- || tail->expr->symtree->n.sym->attr.proc_pointer))
+ || tail->expr->ref->type == REF_ARRAY));
+ if (sym && sym->ts.type == BT_CLASS)
+ b2 = !(CLASS_DATA (sym)->attr.allocatable
+ || CLASS_DATA (sym)->attr.class_pointer);
+ else
+ b2 = sym && !(sym->attr.allocatable || sym->attr.pointer
+ || sym->attr.proc_pointer);
+ if (b1 && b2)
{
gfc_error ("Allocate-object at %C is not a nonprocedure pointer "
"or an allocatable variable");
new_st.op = EXEC_DEALLOCATE;
new_st.expr1 = stat;
new_st.expr2 = errmsg;
- new_st.ext.alloc_list = head;
+ new_st.ext.alloc.list = head;
return MATCH_YES;
gfc_compile_state s;
e = NULL;
+
+ if (gfc_find_state (COMP_CRITICAL) == SUCCESS)
+ {
+ gfc_error ("Image control statement RETURN at %C in CRITICAL block");
+ return MATCH_ERROR;
+ }
+
if (gfc_match_eos () == MATCH_YES)
goto done;
static match
match_typebound_call (gfc_symtree* varst)
{
- gfc_symbol* var;
gfc_expr* base;
match m;
- var = varst->n.sym;
-
base = gfc_get_expr ();
base->expr_type = EXPR_VARIABLE;
base->symtree = varst;
/* If this is a variable of derived-type, it probably starts a type-bound
procedure call. */
- if (sym->attr.flavor != FL_PROCEDURE && sym->ts.type == BT_DERIVED)
+ if ((sym->attr.flavor != FL_PROCEDURE
+ || gfc_is_function_return_value (sym, gfc_current_ns))
+ && (sym->ts.type == BT_DERIVED || sym->ts.type == BT_CLASS))
return match_typebound_call (st);
/* If it does not seem to be callable (include functions so that the
c->op = EXEC_SELECT;
new_case = gfc_get_case ();
- new_case->high = new_case->low = gfc_int_expr (i);
+ new_case->high = gfc_get_int_expr (gfc_default_integer_kind, NULL, i);
+ new_case->low = new_case->high;
c->ext.case_list = new_case;
c->next = gfc_get_code ();
/* Deal with an optional array specification after the
symbol name. */
- m = gfc_match_array_spec (&as);
+ m = gfc_match_array_spec (&as, true, true);
if (m == MATCH_ERROR)
goto cleanup;
do this. */
void
-gfc_free_equiv (gfc_equiv *eq)
+gfc_free_equiv_until (gfc_equiv *eq, gfc_equiv *stop)
{
- if (eq == NULL)
+ if (eq == stop)
return;
gfc_free_equiv (eq->eq);
- gfc_free_equiv (eq->next);
+ gfc_free_equiv_until (eq->next, stop);
gfc_free_expr (eq->expr);
gfc_free (eq);
}
+void
+gfc_free_equiv (gfc_equiv *eq)
+{
+ gfc_free_equiv_until (eq, NULL);
+}
+
+
/* Match an EQUIVALENCE statement. */
match
if (gfc_match_eos () == MATCH_YES)
break;
if (gfc_match_char (',') != MATCH_YES)
- goto syntax;
+ {
+ gfc_error ("Expecting a comma in EQUIVALENCE at %C");
+ goto cleanup;
+ }
}
return MATCH_YES;
/* If the case construct doesn't have a case-construct-name, we
should have matched the EOS. */
if (!gfc_current_block ())
- {
- gfc_error ("Expected the name of the SELECT CASE construct at %C");
- return MATCH_ERROR;
- }
+ return MATCH_NO;
gfc_gobble_whitespace ();
if (strcmp (name, gfc_current_block ()->name) != 0)
{
- gfc_error ("Expected case name of '%s' at %C",
+ gfc_error ("Expected block name '%s' of SELECT construct at %C",
gfc_current_block ()->name);
return MATCH_ERROR;
}
}
+/* Push the current selector onto the SELECT TYPE stack. */
+
+static void
+select_type_push (gfc_symbol *sel)
+{
+ gfc_select_type_stack *top = gfc_get_select_type_stack ();
+ top->selector = sel;
+ top->tmp = NULL;
+ top->prev = select_type_stack;
+
+ select_type_stack = top;
+}
+
+
+/* Set the temporary for the current SELECT TYPE selector. */
+
+static void
+select_type_set_tmp (gfc_typespec *ts)
+{
+ char name[GFC_MAX_SYMBOL_LEN];
+ gfc_symtree *tmp;
+
+ if (!ts)
+ {
+ select_type_stack->tmp = NULL;
+ return;
+ }
+
+ if (!gfc_type_is_extensible (ts->u.derived))
+ return;
+
+ if (ts->type == BT_CLASS)
+ sprintf (name, "__tmp_class_%s", ts->u.derived->name);
+ else
+ sprintf (name, "__tmp_type_%s", ts->u.derived->name);
+ gfc_get_sym_tree (name, gfc_current_ns, &tmp, false);
+ gfc_add_type (tmp->n.sym, ts, NULL);
+ gfc_set_sym_referenced (tmp->n.sym);
+ gfc_add_pointer (&tmp->n.sym->attr, NULL);
+ gfc_add_flavor (&tmp->n.sym->attr, FL_VARIABLE, name, NULL);
+ if (ts->type == BT_CLASS)
+ {
+ gfc_build_class_symbol (&tmp->n.sym->ts, &tmp->n.sym->attr,
+ &tmp->n.sym->as, false);
+ tmp->n.sym->attr.class_ok = 1;
+ }
+ tmp->n.sym->attr.select_type_temporary = 1;
+
+ /* Add an association for it, so the rest of the parser knows it is
+ an associate-name. The target will be set during resolution. */
+ tmp->n.sym->assoc = gfc_get_association_list ();
+ tmp->n.sym->assoc->dangling = 1;
+ tmp->n.sym->assoc->st = tmp;
+
+ select_type_stack->tmp = tmp;
+}
+
+
+/* Match a SELECT TYPE statement. */
+
+match
+gfc_match_select_type (void)
+{
+ gfc_expr *expr1, *expr2 = NULL;
+ match m;
+ char name[GFC_MAX_SYMBOL_LEN];
+
+ m = gfc_match_label ();
+ if (m == MATCH_ERROR)
+ return m;
+
+ m = gfc_match (" select type ( ");
+ if (m != MATCH_YES)
+ return m;
+
+ gfc_current_ns = gfc_build_block_ns (gfc_current_ns);
+
+ m = gfc_match (" %n => %e", name, &expr2);
+ if (m == MATCH_YES)
+ {
+ expr1 = gfc_get_expr();
+ expr1->expr_type = EXPR_VARIABLE;
+ if (gfc_get_sym_tree (name, NULL, &expr1->symtree, false))
+ {
+ m = MATCH_ERROR;
+ goto cleanup;
+ }
+ if (expr2->ts.type == BT_UNKNOWN)
+ expr1->symtree->n.sym->attr.untyped = 1;
+ else
+ expr1->symtree->n.sym->ts = expr2->ts;
+ expr1->symtree->n.sym->attr.flavor = FL_VARIABLE;
+ expr1->symtree->n.sym->attr.referenced = 1;
+ expr1->symtree->n.sym->attr.class_ok = 1;
+ }
+ else
+ {
+ m = gfc_match (" %e ", &expr1);
+ if (m != MATCH_YES)
+ goto cleanup;
+ }
+
+ m = gfc_match (" )%t");
+ if (m != MATCH_YES)
+ goto cleanup;
+
+ /* Check for F03:C811. */
+ if (!expr2 && (expr1->expr_type != EXPR_VARIABLE || expr1->ref != NULL))
+ {
+ gfc_error ("Selector in SELECT TYPE at %C is not a named variable; "
+ "use associate-name=>");
+ m = MATCH_ERROR;
+ goto cleanup;
+ }
+
+ new_st.op = EXEC_SELECT_TYPE;
+ new_st.expr1 = expr1;
+ new_st.expr2 = expr2;
+ new_st.ext.block.ns = gfc_current_ns;
+
+ select_type_push (expr1->symtree->n.sym);
+
+ return MATCH_YES;
+
+cleanup:
+ gfc_current_ns = gfc_current_ns->parent;
+ return m;
+}
+
+
/* Match a CASE statement. */
match
return MATCH_YES;
syntax:
- gfc_error ("Syntax error in CASE-specification at %C");
+ gfc_error ("Syntax error in CASE specification at %C");
cleanup:
gfc_free_case_list (head); /* new_st is cleaned up in parse.c. */
return MATCH_ERROR;
}
+
+/* Match a TYPE IS statement. */
+
+match
+gfc_match_type_is (void)
+{
+ gfc_case *c = NULL;
+ match m;
+
+ if (gfc_current_state () != COMP_SELECT_TYPE)
+ {
+ gfc_error ("Unexpected TYPE IS statement at %C");
+ return MATCH_ERROR;
+ }
+
+ if (gfc_match_char ('(') != MATCH_YES)
+ goto syntax;
+
+ c = gfc_get_case ();
+ c->where = gfc_current_locus;
+
+ /* TODO: Once unlimited polymorphism is implemented, we will need to call
+ match_type_spec here. */
+ if (match_derived_type_spec (&c->ts) == MATCH_ERROR)
+ goto cleanup;
+
+ if (gfc_match_char (')') != MATCH_YES)
+ goto syntax;
+
+ m = match_case_eos ();
+ if (m == MATCH_NO)
+ goto syntax;
+ if (m == MATCH_ERROR)
+ goto cleanup;
+
+ new_st.op = EXEC_SELECT_TYPE;
+ new_st.ext.case_list = c;
+
+ /* Create temporary variable. */
+ select_type_set_tmp (&c->ts);
+
+ return MATCH_YES;
+
+syntax:
+ gfc_error ("Syntax error in TYPE IS specification at %C");
+
+cleanup:
+ if (c != NULL)
+ gfc_free_case_list (c); /* new_st is cleaned up in parse.c. */
+ return MATCH_ERROR;
+}
+
+
+/* Match a CLASS IS or CLASS DEFAULT statement. */
+
+match
+gfc_match_class_is (void)
+{
+ gfc_case *c = NULL;
+ match m;
+
+ if (gfc_current_state () != COMP_SELECT_TYPE)
+ return MATCH_NO;
+
+ if (gfc_match ("% default") == MATCH_YES)
+ {
+ m = match_case_eos ();
+ if (m == MATCH_NO)
+ goto syntax;
+ if (m == MATCH_ERROR)
+ goto cleanup;
+
+ new_st.op = EXEC_SELECT_TYPE;
+ c = gfc_get_case ();
+ c->where = gfc_current_locus;
+ c->ts.type = BT_UNKNOWN;
+ new_st.ext.case_list = c;
+ select_type_set_tmp (NULL);
+ return MATCH_YES;
+ }
+
+ m = gfc_match ("% is");
+ if (m == MATCH_NO)
+ goto syntax;
+ if (m == MATCH_ERROR)
+ goto cleanup;
+
+ if (gfc_match_char ('(') != MATCH_YES)
+ goto syntax;
+
+ c = gfc_get_case ();
+ c->where = gfc_current_locus;
+
+ if (match_derived_type_spec (&c->ts) == MATCH_ERROR)
+ goto cleanup;
+
+ if (c->ts.type == BT_DERIVED)
+ c->ts.type = BT_CLASS;
+
+ if (gfc_match_char (')') != MATCH_YES)
+ goto syntax;
+
+ m = match_case_eos ();
+ if (m == MATCH_NO)
+ goto syntax;
+ if (m == MATCH_ERROR)
+ goto cleanup;
+
+ new_st.op = EXEC_SELECT_TYPE;
+ new_st.ext.case_list = c;
+
+ /* Create temporary variable. */
+ select_type_set_tmp (&c->ts);
+
+ return MATCH_YES;
+
+syntax:
+ gfc_error ("Syntax error in CLASS IS specification at %C");
+
+cleanup:
+ if (c != NULL)
+ gfc_free_case_list (c); /* new_st is cleaned up in parse.c. */
+ return MATCH_ERROR;
+}
+
+
/********************* WHERE subroutines ********************/
/* Match the rest of a simple WHERE statement that follows an IF statement.
goto cleanup;
if (gfc_match_char (':') == MATCH_NO)
- iter->stride = gfc_int_expr (1);
+ iter->stride = gfc_get_int_expr (gfc_default_integer_kind, NULL, 1);
else
{
m = gfc_match_expr (&iter->stride);
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