/* Matching subroutines in all sizes, shapes and colors.
Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
- 2009, 2010
- 2010 Free Software Foundation, Inc.
+ 2009, 2010, 2011
+ Free Software Foundation, Inc.
Contributed by Andy Vaught
This file is part of GCC.
match ("go to", gfc_match_goto, ST_GOTO)
match ("if", match_arithmetic_if, ST_ARITHMETIC_IF)
match ("inquire", gfc_match_inquire, ST_INQUIRE)
+ match ("lock", gfc_match_lock, ST_LOCK)
match ("nullify", gfc_match_nullify, ST_NULLIFY)
match ("open", gfc_match_open, ST_OPEN)
match ("pause", gfc_match_pause, ST_NONE)
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 ("unlock", gfc_match_unlock, ST_UNLOCK)
match ("where", match_simple_where, ST_WHERE)
match ("write", gfc_match_write, ST_WRITE)
gfc_free_expr (iter->step);
if (flag)
- gfc_free (iter);
+ free (iter);
}
return MATCH_ERROR;
}
+ if (gfc_find_state (COMP_DO_CONCURRENT) == SUCCESS)
+ {
+ gfc_error ("Image control statement CRITICAL at %C in DO CONCURRENT "
+ "block");
+ return MATCH_ERROR;
+ }
+
+ if (gfc_implicit_pure (NULL))
+ gfc_current_ns->proc_name->attr.implicit_pure = 0;
+
if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: CRITICAL statement at %C")
== FAILURE)
return MATCH_ERROR;
continue;
assocListError:
- gfc_free (newAssoc);
+ free (newAssoc);
goto error;
}
if (gfc_match_char (')') != MATCH_YES)
}
-/* Match a DO statement. */
+/* Match a Fortran 2003 derived-type-spec (F03:R455), which is just the name of
+ an accessible derived type. */
-match
-gfc_match_do (void)
+static match
+match_derived_type_spec (gfc_typespec *ts)
{
- gfc_iterator iter, *ip;
- locus old_loc;
- gfc_st_label *label;
- match m;
+ char name[GFC_MAX_SYMBOL_LEN + 1];
+ locus old_locus;
+ gfc_symbol *derived;
- old_loc = gfc_current_locus;
+ old_locus = gfc_current_locus;
- label = NULL;
- iter.var = iter.start = iter.end = iter.step = NULL;
+ if (gfc_match ("%n", name) != MATCH_YES)
+ {
+ gfc_current_locus = old_locus;
+ return MATCH_NO;
+ }
- m = gfc_match_label ();
- if (m == MATCH_ERROR)
- return m;
+ gfc_find_symbol (name, NULL, 1, &derived);
- if (gfc_match (" do") != MATCH_YES)
- return MATCH_NO;
+ if (derived && derived->attr.flavor == FL_DERIVED)
+ {
+ ts->type = BT_DERIVED;
+ ts->u.derived = derived;
+ return MATCH_YES;
+ }
- m = gfc_match_st_label (&label);
- if (m == MATCH_ERROR)
- goto cleanup;
+ gfc_current_locus = old_locus;
+ return MATCH_NO;
+}
- /* Match an infinite DO, make it like a DO WHILE(.TRUE.). */
- if (gfc_match_eos () == MATCH_YES)
+/* 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)
{
- iter.end = gfc_get_logical_expr (gfc_default_logical_kind, NULL, true);
- new_st.op = EXEC_DO_WHILE;
- goto done;
+ /* 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;
}
- /* Match an optional comma, if no comma is found, a space is obligatory. */
- if (gfc_match_char (',') != MATCH_YES && gfc_match ("% ") != MATCH_YES)
- return MATCH_NO;
+ if (gfc_match ("integer") == MATCH_YES)
+ {
+ ts->type = BT_INTEGER;
+ ts->kind = gfc_default_integer_kind;
+ goto kind_selector;
+ }
- /* Check for balanced parens. */
-
- if (gfc_match_parens () == MATCH_ERROR)
- return MATCH_ERROR;
+ if (gfc_match ("real") == MATCH_YES)
+ {
+ ts->type = BT_REAL;
+ ts->kind = gfc_default_real_kind;
+ goto kind_selector;
+ }
- /* See if we have a DO WHILE. */
- if (gfc_match (" while ( %e )%t", &iter.end) == MATCH_YES)
+ if (gfc_match ("double precision") == MATCH_YES)
{
- new_st.op = EXEC_DO_WHILE;
- goto done;
+ ts->type = BT_REAL;
+ ts->kind = gfc_default_double_kind;
+ return MATCH_YES;
}
- /* The abortive DO WHILE may have done something to the symbol
- table, so we start over. */
- gfc_undo_symbols ();
- gfc_current_locus = old_loc;
+ if (gfc_match ("complex") == MATCH_YES)
+ {
+ ts->type = BT_COMPLEX;
+ ts->kind = gfc_default_complex_kind;
+ goto kind_selector;
+ }
- gfc_match_label (); /* This won't error. */
- gfc_match (" do "); /* This will work. */
+ if (gfc_match ("character") == MATCH_YES)
+ {
+ ts->type = BT_CHARACTER;
- gfc_match_st_label (&label); /* Can't error out. */
- gfc_match_char (','); /* Optional comma. */
+ m = gfc_match_char_spec (ts);
- m = gfc_match_iterator (&iter, 0);
- if (m == MATCH_NO)
- return MATCH_NO;
- if (m == MATCH_ERROR)
- goto cleanup;
+ if (m == MATCH_NO)
+ m = MATCH_YES;
- iter.var->symtree->n.sym->attr.implied_index = 0;
- gfc_check_do_variable (iter.var->symtree);
+ return m;
+ }
- if (gfc_match_eos () != MATCH_YES)
+ if (gfc_match ("logical") == MATCH_YES)
{
- gfc_syntax_error (ST_DO);
- goto cleanup;
+ ts->type = BT_LOGICAL;
+ ts->kind = gfc_default_logical_kind;
+ goto kind_selector;
}
- new_st.op = EXEC_DO;
-
-done:
- if (label != NULL
- && gfc_reference_st_label (label, ST_LABEL_TARGET) == FAILURE)
- goto cleanup;
+ /* If a type is not matched, simply return MATCH_NO. */
+ gfc_current_locus = old_locus;
+ return MATCH_NO;
- new_st.label1 = label;
+kind_selector:
- if (new_st.op == EXEC_DO_WHILE)
- new_st.expr1 = iter.end;
- else
+ gfc_gobble_whitespace ();
+ if (gfc_peek_ascii_char () == '*')
{
- new_st.ext.iterator = ip = gfc_get_iterator ();
- *ip = iter;
+ gfc_error ("Invalid type-spec at %C");
+ return MATCH_ERROR;
}
- return MATCH_YES;
+ m = gfc_match_kind_spec (ts, false);
-cleanup:
- gfc_free_iterator (&iter, 0);
+ if (m == MATCH_NO)
+ m = MATCH_YES; /* No kind specifier found. */
- return MATCH_ERROR;
+ return m;
}
-/* Match an EXIT or CYCLE statement. */
+/******************** FORALL subroutines ********************/
-static match
-match_exit_cycle (gfc_statement st, gfc_exec_op op)
+/* Free a list of FORALL iterators. */
+
+void
+gfc_free_forall_iterator (gfc_forall_iterator *iter)
{
- gfc_state_data *p, *o;
- gfc_symbol *sym;
- match m;
- int cnt;
+ gfc_forall_iterator *next;
- if (gfc_match_eos () == MATCH_YES)
- sym = NULL;
- else
+ while (iter)
{
- char name[GFC_MAX_SYMBOL_LEN + 1];
- gfc_symtree* stree;
+ next = iter->next;
+ gfc_free_expr (iter->var);
+ gfc_free_expr (iter->start);
+ gfc_free_expr (iter->end);
+ gfc_free_expr (iter->stride);
+ free (iter);
+ iter = next;
+ }
+}
- m = gfc_match ("% %n%t", name);
- if (m == MATCH_ERROR)
- return MATCH_ERROR;
- if (m == MATCH_NO)
- {
- gfc_syntax_error (st);
- 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;
- }
+/* Match an iterator as part of a FORALL statement. The format is:
- sym = stree->n.sym;
- if (sym->attr.flavor != FL_LABEL)
- {
- gfc_error ("Name '%s' in %s statement at %C is not a construct name",
- name, gfc_ascii_statement (st));
- return MATCH_ERROR;
- }
- }
+ <var> = <start>:<end>[:<stride>]
- /* Find the loop specified by the label (or lack of a label). */
- for (o = NULL, p = gfc_state_stack; p; p = p->previous)
- 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;
+ On MATCH_NO, the caller tests for the possibility that there is a
+ scalar mask expression. */
- if (p == NULL)
- {
- if (sym == NULL)
- 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 construct '%s'",
- gfc_ascii_statement (st), sym->name);
+static match
+match_forall_iterator (gfc_forall_iterator **result)
+{
+ gfc_forall_iterator *iter;
+ locus where;
+ match m;
- return MATCH_ERROR;
- }
+ where = gfc_current_locus;
+ iter = XCNEW (gfc_forall_iterator);
- /* Special checks for EXIT from non-loop constructs. */
- switch (p->state)
+ m = gfc_match_expr (&iter->var);
+ if (m != MATCH_YES)
+ goto cleanup;
+
+ if (gfc_match_char ('=') != MATCH_YES
+ || iter->var->expr_type != EXPR_VARIABLE)
{
- case COMP_DO:
- break;
+ m = MATCH_NO;
+ goto cleanup;
+ }
- case COMP_CRITICAL:
- /* This is already handled above. */
- gcc_unreachable ();
+ m = gfc_match_expr (&iter->start);
+ if (m != MATCH_YES)
+ goto cleanup;
- 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 (gfc_match_char (':') != MATCH_YES)
+ goto syntax;
- if (o != NULL)
- {
- gfc_error ("%s statement at %C leaving OpenMP structured block",
- gfc_ascii_statement (st));
- return MATCH_ERROR;
- }
+ m = gfc_match_expr (&iter->end);
+ if (m == MATCH_NO)
+ goto syntax;
+ if (m == MATCH_ERROR)
+ goto cleanup;
- 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))
+ if (gfc_match_char (':') == MATCH_NO)
+ iter->stride = gfc_get_int_expr (gfc_default_integer_kind, NULL, 1);
+ else
{
- 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;
- }
+ m = gfc_match_expr (&iter->stride);
+ if (m == MATCH_NO)
+ goto syntax;
+ if (m == MATCH_ERROR)
+ goto cleanup;
}
- /* Save the first statement in the construct - needed by the backend. */
- new_st.ext.which_construct = p->construct;
-
- new_st.op = op;
+ /* Mark the iteration variable's symbol as used as a FORALL index. */
+ iter->var->symtree->n.sym->forall_index = true;
+ *result = iter;
return MATCH_YES;
-}
-
-
-/* Match the EXIT statement. */
-
-match
-gfc_match_exit (void)
-{
- return match_exit_cycle (ST_EXIT, EXEC_EXIT);
-}
+syntax:
+ gfc_error ("Syntax error in FORALL iterator at %C");
+ m = MATCH_ERROR;
-/* Match the CYCLE statement. */
+cleanup:
-match
-gfc_match_cycle (void)
-{
- return match_exit_cycle (ST_CYCLE, EXEC_CYCLE);
+ gfc_current_locus = where;
+ gfc_free_forall_iterator (iter);
+ return m;
}
-/* Match a number or character constant after an (ALL) STOP or PAUSE statement. */
+/* Match the header of a FORALL statement. */
static match
-gfc_match_stopcode (gfc_statement st)
+match_forall_header (gfc_forall_iterator **phead, gfc_expr **mask)
{
- gfc_expr *e;
+ gfc_forall_iterator *head, *tail, *new_iter;
+ gfc_expr *msk;
match m;
- e = NULL;
+ gfc_gobble_whitespace ();
- if (gfc_match_eos () != MATCH_YES)
- {
- m = gfc_match_init_expr (&e);
- if (m == MATCH_ERROR)
- goto cleanup;
- if (m == MATCH_NO)
- goto syntax;
+ head = tail = NULL;
+ msk = NULL;
- if (gfc_match_eos () != MATCH_YES)
- goto syntax;
- }
+ if (gfc_match_char ('(') != MATCH_YES)
+ return MATCH_NO;
- if (gfc_pure (NULL))
- {
- gfc_error ("%s statement not allowed in PURE procedure at %C",
- gfc_ascii_statement (st));
- goto cleanup;
- }
+ m = match_forall_iterator (&new_iter);
+ if (m == MATCH_ERROR)
+ goto cleanup;
+ if (m == MATCH_NO)
+ goto syntax;
- if (st == ST_STOP && gfc_find_state (COMP_CRITICAL) == SUCCESS)
- {
- gfc_error ("Image control statement STOP at %C in CRITICAL block");
- goto cleanup;
- }
+ head = tail = new_iter;
- if (e != NULL)
+ for (;;)
{
- 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 (gfc_match_char (',') != MATCH_YES)
+ break;
- if (e->rank != 0)
- {
- gfc_error ("STOP code at %L must be scalar",
- &e->where);
- goto cleanup;
- }
+ m = match_forall_iterator (&new_iter);
+ if (m == MATCH_ERROR)
+ goto cleanup;
- if (e->ts.type == BT_CHARACTER
- && e->ts.kind != gfc_default_character_kind)
+ if (m == MATCH_YES)
{
- gfc_error ("STOP code at %L must be default character KIND=%d",
- &e->where, (int) gfc_default_character_kind);
- goto cleanup;
+ tail->next = new_iter;
+ tail = new_iter;
+ continue;
}
- 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;
- }
- }
+ /* Have to have a mask expression. */
+
+ m = gfc_match_expr (&msk);
+ if (m == MATCH_NO)
+ goto syntax;
+ if (m == MATCH_ERROR)
+ 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 = -1;
+ if (gfc_match_char (')') == MATCH_NO)
+ goto syntax;
+ *phead = head;
+ *mask = msk;
return MATCH_YES;
syntax:
- gfc_syntax_error (st);
+ gfc_syntax_error (ST_FORALL);
cleanup:
+ gfc_free_expr (msk);
+ gfc_free_forall_iterator (head);
- gfc_free_expr (e);
return MATCH_ERROR;
}
+/* Match the rest of a simple FORALL statement that follows an
+ IF statement. */
-/* Match the (deprecated) PAUSE statement. */
-
-match
-gfc_match_pause (void)
+static match
+match_simple_forall (void)
{
+ gfc_forall_iterator *head;
+ gfc_expr *mask;
+ gfc_code *c;
match m;
- m = gfc_match_stopcode (ST_PAUSE);
- if (m == MATCH_YES)
- {
- if (gfc_notify_std (GFC_STD_F95_DEL, "Deleted feature: PAUSE statement"
- " at %C")
- == FAILURE)
- m = MATCH_ERROR;
- }
- return m;
-}
+ mask = NULL;
+ head = NULL;
+ c = NULL;
+ m = match_forall_header (&head, &mask);
-/* Match the STOP statement. */
+ if (m == MATCH_NO)
+ goto syntax;
+ if (m != MATCH_YES)
+ goto cleanup;
-match
-gfc_match_stop (void)
-{
- return gfc_match_stopcode (ST_STOP);
-}
+ m = gfc_match_assignment ();
+ if (m == MATCH_ERROR)
+ goto cleanup;
+ if (m == MATCH_NO)
+ {
+ m = gfc_match_pointer_assignment ();
+ if (m == MATCH_ERROR)
+ goto cleanup;
+ if (m == MATCH_NO)
+ goto syntax;
+ }
-/* Match the ERROR STOP statement. */
+ c = gfc_get_code ();
+ *c = new_st;
+ c->loc = gfc_current_locus;
-match
-gfc_match_error_stop (void)
-{
- if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: ERROR STOP statement at %C")
- == FAILURE)
- return MATCH_ERROR;
+ if (gfc_match_eos () != MATCH_YES)
+ goto syntax;
- return gfc_match_stopcode (ST_ERROR_STOP);
+ gfc_clear_new_st ();
+ new_st.op = EXEC_FORALL;
+ new_st.expr1 = mask;
+ new_st.ext.forall_iterator = head;
+ new_st.block = gfc_get_code ();
+
+ new_st.block->op = EXEC_FORALL;
+ new_st.block->next = c;
+
+ return MATCH_YES;
+
+syntax:
+ gfc_syntax_error (ST_FORALL);
+
+cleanup:
+ gfc_free_forall_iterator (head);
+ gfc_free_expr (mask);
+
+ return MATCH_ERROR;
}
-/* 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 a FORALL statement. */
-static match
-sync_statement (gfc_statement st)
+match
+gfc_match_forall (gfc_statement *st)
{
- match m;
- gfc_expr *tmp, *imageset, *stat, *errmsg;
- bool saw_stat, saw_errmsg;
-
- tmp = imageset = stat = errmsg = NULL;
- saw_stat = saw_errmsg = false;
+ gfc_forall_iterator *head;
+ gfc_expr *mask;
+ gfc_code *c;
+ match m0, m;
- if (gfc_pure (NULL))
- {
- gfc_error ("Image control statement SYNC at %C in PURE procedure");
- return MATCH_ERROR;
- }
+ head = NULL;
+ mask = NULL;
+ c = NULL;
- if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: SYNC statement at %C")
- == FAILURE)
+ m0 = gfc_match_label ();
+ if (m0 == MATCH_ERROR)
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 ("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;
- }
+ m = gfc_match (" forall");
+ if (m != MATCH_YES)
+ return m;
- if (gfc_match_char ('(') != MATCH_YES)
+ m = match_forall_header (&head, &mask);
+ if (m == MATCH_ERROR)
+ goto cleanup;
+ if (m == MATCH_NO)
goto syntax;
- if (st == ST_SYNC_IMAGES)
+ if (gfc_match_eos () == MATCH_YES)
{
- /* 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;
- }
+ *st = ST_FORALL_BLOCK;
+ new_st.op = EXEC_FORALL;
+ new_st.expr1 = mask;
+ new_st.ext.forall_iterator = head;
+ return MATCH_YES;
}
- for (;;)
+ m = gfc_match_assignment ();
+ if (m == MATCH_ERROR)
+ goto cleanup;
+ if (m == MATCH_NO)
{
- 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);
+ m = gfc_match_pointer_assignment ();
if (m == MATCH_ERROR)
+ goto cleanup;
+ if (m == MATCH_NO)
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 ();
- }
+ c = gfc_get_code ();
+ *c = new_st;
+ c->loc = gfc_current_locus;
- new_st.expr1 = imageset;
- new_st.expr2 = stat;
- new_st.expr3 = errmsg;
+ gfc_clear_new_st ();
+ new_st.op = EXEC_FORALL;
+ new_st.expr1 = mask;
+ new_st.ext.forall_iterator = head;
+ new_st.block = gfc_get_code ();
+ new_st.block->op = EXEC_FORALL;
+ new_st.block->next = c;
+ *st = ST_FORALL;
return MATCH_YES;
syntax:
- gfc_syntax_error (st);
+ gfc_syntax_error (ST_FORALL);
cleanup:
- gfc_free_expr (tmp);
- gfc_free_expr (imageset);
- gfc_free_expr (stat);
- gfc_free_expr (errmsg);
-
- return MATCH_ERROR;
+ gfc_free_forall_iterator (head);
+ gfc_free_expr (mask);
+ gfc_free_statements (c);
+ return MATCH_NO;
}
-/* Match SYNC ALL statement. */
+/* Match a DO statement. */
match
-gfc_match_sync_all (void)
+gfc_match_do (void)
{
- return sync_statement (ST_SYNC_ALL);
-}
-
-
-/* Match SYNC IMAGES statement. */
+ gfc_iterator iter, *ip;
+ locus old_loc;
+ gfc_st_label *label;
+ match m;
-match
-gfc_match_sync_images (void)
-{
- return sync_statement (ST_SYNC_IMAGES);
-}
+ old_loc = gfc_current_locus;
+ label = NULL;
+ iter.var = iter.start = iter.end = iter.step = NULL;
-/* Match SYNC MEMORY statement. */
+ m = gfc_match_label ();
+ if (m == MATCH_ERROR)
+ return m;
-match
-gfc_match_sync_memory (void)
-{
- return sync_statement (ST_SYNC_MEMORY);
-}
+ if (gfc_match (" do") != MATCH_YES)
+ return MATCH_NO;
+ m = gfc_match_st_label (&label);
+ if (m == MATCH_ERROR)
+ goto cleanup;
-/* Match a CONTINUE statement. */
+ /* Match an infinite DO, make it like a DO WHILE(.TRUE.). */
-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_match_eos () == 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;
- }
+ iter.end = gfc_get_logical_expr (gfc_default_logical_kind, NULL, true);
+ new_st.op = EXEC_DO_WHILE;
+ goto done;
}
- return MATCH_NO;
-}
+ /* Match an optional comma, if no comma is found, a space is obligatory. */
+ if (gfc_match_char (',') != MATCH_YES && gfc_match ("% ") != 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;
+ /* Check for balanced parens. */
+
+ if (gfc_match_parens () == MATCH_ERROR)
+ return MATCH_ERROR;
- if (gfc_match (" %l%t", &label) == MATCH_YES)
+ if (gfc_match (" concurrent") == 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. */
+ gfc_forall_iterator *head;
+ gfc_expr *mask;
- if (gfc_match_variable (&expr, 0) == MATCH_YES)
- {
- if (gfc_notify_std (GFC_STD_F95_DEL, "Deleted feature: Assigned GOTO "
- "statement at %C")
- == FAILURE)
+ if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: DO CONCURRENT "
+ "construct at %C") == FAILURE)
return MATCH_ERROR;
- new_st.op = EXEC_GOTO;
- new_st.expr1 = expr;
-
- if (gfc_match_eos () == MATCH_YES)
- return MATCH_YES;
-
- /* Match label list. */
- gfc_match_char (',');
- if (gfc_match_char ('(') != MATCH_YES)
- {
- gfc_syntax_error (ST_GOTO);
- return MATCH_ERROR;
- }
- head = tail = NULL;
-
- do
- {
- m = gfc_match_st_label (&label);
- if (m != MATCH_YES)
- goto syntax;
- if (gfc_reference_st_label (label, ST_LABEL_TARGET) == FAILURE)
- goto cleanup;
+ mask = NULL;
+ head = NULL;
+ m = match_forall_header (&head, &mask);
- if (head == NULL)
- head = tail = gfc_get_code ();
- else
- {
- tail->block = gfc_get_code ();
- tail = tail->block;
- }
+ if (m == MATCH_NO)
+ return m;
+ if (m == MATCH_ERROR)
+ goto concurr_cleanup;
- tail->label1 = label;
- tail->op = EXEC_GOTO;
- }
- while (gfc_match_char (',') == MATCH_YES);
+ if (gfc_match_eos () != MATCH_YES)
+ goto concurr_cleanup;
- if (gfc_match (")%t") != MATCH_YES)
- goto syntax;
+ if (label != NULL
+ && gfc_reference_st_label (label, ST_LABEL_TARGET) == FAILURE)
+ goto concurr_cleanup;
- if (head == NULL)
- {
- gfc_error ("Statement label list in GOTO at %C cannot be empty");
- goto syntax;
- }
- new_st.block = head;
+ new_st.label1 = label;
+ new_st.op = EXEC_DO_CONCURRENT;
+ new_st.expr1 = mask;
+ new_st.ext.forall_iterator = head;
return MATCH_YES;
- }
- /* Last chance is a computed GO TO statement. */
- if (gfc_match_char ('(') != MATCH_YES)
- {
- gfc_syntax_error (ST_GOTO);
+concurr_cleanup:
+ gfc_syntax_error (ST_DO);
+ gfc_free_expr (mask);
+ gfc_free_forall_iterator (head);
return MATCH_ERROR;
}
- head = tail = NULL;
- i = 1;
-
- do
+ /* See if we have a DO WHILE. */
+ if (gfc_match (" while ( %e )%t", &iter.end) == MATCH_YES)
{
- m = gfc_match_st_label (&label);
- if (m != MATCH_YES)
- goto syntax;
-
- if (gfc_reference_st_label (label, ST_LABEL_TARGET) == FAILURE)
- goto cleanup;
+ new_st.op = EXEC_DO_WHILE;
+ goto done;
+ }
- if (head == NULL)
- head = tail = gfc_get_code ();
- else
- {
- tail->block = gfc_get_code ();
- tail = tail->block;
- }
+ /* The abortive DO WHILE may have done something to the symbol
+ table, so we start over. */
+ gfc_undo_symbols ();
+ gfc_current_locus = old_loc;
- cp = gfc_get_case ();
- cp->low = cp->high = gfc_get_int_expr (gfc_default_integer_kind,
- NULL, i++);
+ gfc_match_label (); /* This won't error. */
+ gfc_match (" do "); /* This will work. */
- tail->op = EXEC_SELECT;
- tail->ext.case_list = cp;
+ gfc_match_st_label (&label); /* Can't error out. */
+ gfc_match_char (','); /* Optional comma. */
- tail->next = gfc_get_code ();
- tail->next->op = EXEC_GOTO;
- tail->next->label1 = label;
- }
- while (gfc_match_char (',') == MATCH_YES);
+ m = gfc_match_iterator (&iter, 0);
+ if (m == MATCH_NO)
+ return MATCH_NO;
+ if (m == MATCH_ERROR)
+ goto cleanup;
- if (gfc_match_char (')') != MATCH_YES)
- goto syntax;
+ iter.var->symtree->n.sym->attr.implied_index = 0;
+ gfc_check_do_variable (iter.var->symtree);
- if (head == NULL)
+ if (gfc_match_eos () != MATCH_YES)
{
- gfc_error ("Statement label list in GOTO at %C cannot be empty");
- goto syntax;
+ gfc_syntax_error (ST_DO);
+ goto cleanup;
}
- /* Get the rest of the statement. */
- gfc_match_char (',');
-
- if (gfc_match (" %e%t", &expr) != MATCH_YES)
- goto syntax;
+ new_st.op = EXEC_DO;
- if (gfc_notify_std (GFC_STD_F95_OBS, "Obsolescent feature: Computed GOTO "
- "at %C") == FAILURE)
- return MATCH_ERROR;
+done:
+ if (label != NULL
+ && gfc_reference_st_label (label, ST_LABEL_TARGET) == FAILURE)
+ goto cleanup;
- /* At this point, a computed GOTO has been fully matched and an
- equivalent SELECT statement constructed. */
+ new_st.label1 = label;
- new_st.op = EXEC_SELECT;
- new_st.expr1 = NULL;
+ if (new_st.op == EXEC_DO_WHILE)
+ new_st.expr1 = iter.end;
+ else
+ {
+ new_st.ext.iterator = ip = gfc_get_iterator ();
+ *ip = iter;
+ }
- /* Hack: For a "real" SELECT, the expression is in expr. We put
- it in expr2 so we can distinguish then and produce the correct
- diagnostics. */
- new_st.expr2 = expr;
- new_st.block = head;
return MATCH_YES;
-syntax:
- gfc_syntax_error (ST_GOTO);
cleanup:
- gfc_free_statements (head);
+ gfc_free_iterator (&iter, 0);
+
return MATCH_ERROR;
}
-/* Frees a list of gfc_alloc structures. */
+/* Match an EXIT or CYCLE statement. */
-void
-gfc_free_alloc_list (gfc_alloc *p)
+static match
+match_exit_cycle (gfc_statement st, gfc_exec_op op)
{
- gfc_alloc *q;
+ gfc_state_data *p, *o;
+ gfc_symbol *sym;
+ match m;
+ int cnt;
- for (; p; p = q)
+ if (gfc_match_eos () == MATCH_YES)
+ sym = NULL;
+ else
{
- q = p->next;
- gfc_free_expr (p->expr);
- gfc_free (p);
- }
-}
-
+ char name[GFC_MAX_SYMBOL_LEN + 1];
+ gfc_symtree* stree;
-/* Match a Fortran 2003 derived-type-spec (F03:R455), which is just the name of
- an accessible derived type. */
+ m = gfc_match ("% %n%t", name);
+ if (m == MATCH_ERROR)
+ return MATCH_ERROR;
+ if (m == MATCH_NO)
+ {
+ gfc_syntax_error (st);
+ return MATCH_ERROR;
+ }
-static match
-match_derived_type_spec (gfc_typespec *ts)
-{
- char name[GFC_MAX_SYMBOL_LEN + 1];
- locus old_locus;
- gfc_symbol *derived;
+ /* 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;
+ }
- old_locus = gfc_current_locus;
+ sym = stree->n.sym;
+ if (sym->attr.flavor != FL_LABEL)
+ {
+ gfc_error ("Name '%s' in %s statement at %C is not a construct name",
+ name, gfc_ascii_statement (st));
+ return MATCH_ERROR;
+ }
+ }
- if (gfc_match ("%n", name) != MATCH_YES)
+ /* Find the loop specified by the label (or lack of a label). */
+ for (o = NULL, p = gfc_state_stack; p; p = p->previous)
+ 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 (p->state == COMP_DO_CONCURRENT
+ && (op == EXEC_EXIT || (sym && sym != p->sym)))
+ {
+ /* F2008, C821 & C845. */
+ gfc_error("%s statement at %C leaves DO CONCURRENT construct",
+ gfc_ascii_statement (st));
+ return MATCH_ERROR;
+ }
+ else if ((sym && sym == p->sym)
+ || (!sym && (p->state == COMP_DO
+ || p->state == COMP_DO_CONCURRENT)))
+ break;
+
+ if (p == NULL)
{
- gfc_current_locus = old_locus;
- return MATCH_NO;
+ if (sym == NULL)
+ 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 construct '%s'",
+ gfc_ascii_statement (st), sym->name);
+
+ return MATCH_ERROR;
}
- gfc_find_symbol (name, NULL, 1, &derived);
+ /* Special checks for EXIT from non-loop constructs. */
+ switch (p->state)
+ {
+ case COMP_DO:
+ case COMP_DO_CONCURRENT:
+ break;
- if (derived && derived->attr.flavor == FL_DERIVED)
+ 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)
{
- ts->type = BT_DERIVED;
- ts->u.derived = derived;
- return MATCH_YES;
+ gfc_error ("%s statement at %C leaving OpenMP structured block",
+ gfc_ascii_statement (st));
+ return MATCH_ERROR;
}
- gfc_current_locus = old_locus;
- return MATCH_NO;
+ 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))
+ {
+ 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 construct - needed by the backend. */
+ new_st.ext.which_construct = p->construct;
+
+ new_st.op = op;
+
+ return MATCH_YES;
}
-/* 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. */
+/* Match the EXIT statement. */
+
+match
+gfc_match_exit (void)
+{
+ return match_exit_cycle (ST_EXIT, EXEC_EXIT);
+}
+
+
+/* Match the CYCLE statement. */
+
+match
+gfc_match_cycle (void)
+{
+ return match_exit_cycle (ST_CYCLE, EXEC_CYCLE);
+}
+
+
+/* Match a number or character constant after an (ALL) STOP or PAUSE statement. */
static match
-match_type_spec (gfc_typespec *ts)
+gfc_match_stopcode (gfc_statement st)
{
+ gfc_expr *e;
match m;
- locus old_locus;
- gfc_clear_ts (ts);
- gfc_gobble_whitespace ();
- old_locus = gfc_current_locus;
+ e = NULL;
- if (match_derived_type_spec (ts) == MATCH_YES)
+ if (gfc_match_eos () != MATCH_YES)
{
- /* Enforce F03:C401. */
- if (ts->u.derived->attr.abstract)
+ m = gfc_match_init_expr (&e);
+ if (m == MATCH_ERROR)
+ goto cleanup;
+ if (m == MATCH_NO)
+ goto syntax;
+
+ if (gfc_match_eos () != MATCH_YES)
+ goto syntax;
+ }
+
+ if (gfc_pure (NULL))
+ {
+ gfc_error ("%s statement not allowed in PURE procedure at %C",
+ gfc_ascii_statement (st));
+ goto cleanup;
+ }
+
+ if (gfc_implicit_pure (NULL))
+ gfc_current_ns->proc_name->attr.implicit_pure = 0;
+
+ if (st == ST_STOP && gfc_find_state (COMP_CRITICAL) == SUCCESS)
+ {
+ gfc_error ("Image control statement STOP at %C in CRITICAL block");
+ goto cleanup;
+ }
+ if (st == ST_STOP && gfc_find_state (COMP_DO_CONCURRENT) == SUCCESS)
+ {
+ gfc_error ("Image control statement STOP at %C in DO CONCURRENT block");
+ goto cleanup;
+ }
+
+ if (e != NULL)
+ {
+ if (!(e->ts.type == BT_CHARACTER || e->ts.type == BT_INTEGER))
{
- gfc_error ("Derived type '%s' at %L may not be ABSTRACT",
- ts->u.derived->name, &old_locus);
- return MATCH_ERROR;
+ 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;
}
- return MATCH_YES;
}
- if (gfc_match ("integer") == MATCH_YES)
+ switch (st)
{
- ts->type = BT_INTEGER;
- ts->kind = gfc_default_integer_kind;
- goto kind_selector;
+ 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 ();
}
- if (gfc_match ("real") == MATCH_YES)
+ new_st.expr1 = e;
+ new_st.ext.stop_code = -1;
+
+ return MATCH_YES;
+
+syntax:
+ gfc_syntax_error (st);
+
+cleanup:
+
+ gfc_free_expr (e);
+ return MATCH_ERROR;
+}
+
+
+/* Match the (deprecated) PAUSE statement. */
+
+match
+gfc_match_pause (void)
+{
+ match m;
+
+ m = gfc_match_stopcode (ST_PAUSE);
+ if (m == MATCH_YES)
{
- ts->type = BT_REAL;
- ts->kind = gfc_default_real_kind;
- goto kind_selector;
+ if (gfc_notify_std (GFC_STD_F95_DEL, "Deleted feature: PAUSE statement"
+ " at %C")
+ == FAILURE)
+ m = MATCH_ERROR;
+ }
+ return m;
+}
+
+
+/* Match the STOP statement. */
+
+match
+gfc_match_stop (void)
+{
+ return gfc_match_stopcode (ST_STOP);
+}
+
+
+/* Match the ERROR STOP statement. */
+
+match
+gfc_match_error_stop (void)
+{
+ if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: ERROR STOP statement at %C")
+ == FAILURE)
+ return MATCH_ERROR;
+
+ return gfc_match_stopcode (ST_ERROR_STOP);
+}
+
+
+/* Match LOCK/UNLOCK statement. Syntax:
+ LOCK ( lock-variable [ , lock-stat-list ] )
+ UNLOCK ( lock-variable [ , sync-stat-list ] )
+ where lock-stat is ACQUIRED_LOCK or sync-stat
+ and sync-stat is STAT= or ERRMSG=. */
+
+static match
+lock_unlock_statement (gfc_statement st)
+{
+ match m;
+ gfc_expr *tmp, *lockvar, *acq_lock, *stat, *errmsg;
+ bool saw_acq_lock, saw_stat, saw_errmsg;
+
+ tmp = lockvar = acq_lock = stat = errmsg = NULL;
+ saw_acq_lock = saw_stat = saw_errmsg = false;
+
+ if (gfc_pure (NULL))
+ {
+ gfc_error ("Image control statement %s at %C in PURE procedure",
+ st == ST_LOCK ? "LOCK" : "UNLOCK");
+ return MATCH_ERROR;
+ }
+
+ if (gfc_implicit_pure (NULL))
+ gfc_current_ns->proc_name->attr.implicit_pure = 0;
+
+ 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 ("Image control statement %s at %C in CRITICAL block",
+ st == ST_LOCK ? "LOCK" : "UNLOCK");
+ return MATCH_ERROR;
}
- if (gfc_match ("double precision") == MATCH_YES)
- {
- ts->type = BT_REAL;
- ts->kind = gfc_default_double_kind;
- return MATCH_YES;
+ if (gfc_find_state (COMP_DO_CONCURRENT) == SUCCESS)
+ {
+ gfc_error ("Image control statement %s at %C in DO CONCURRENT block",
+ st == ST_LOCK ? "LOCK" : "UNLOCK");
+ return MATCH_ERROR;
+ }
+
+ if (gfc_match_char ('(') != MATCH_YES)
+ goto syntax;
+
+ if (gfc_match ("%e", &lockvar) != 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;
+
+ m = gfc_match_char (',');
+ if (m == MATCH_YES)
+ continue;
+
+ tmp = NULL;
+ break;
+ }
+
+ 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;
+
+ m = gfc_match_char (',');
+ if (m == MATCH_YES)
+ continue;
+
+ tmp = NULL;
+ break;
+ }
+
+ m = gfc_match (" acquired_lock = %v", &tmp);
+ if (m == MATCH_ERROR || st == ST_UNLOCK)
+ goto syntax;
+ if (m == MATCH_YES)
+ {
+ if (saw_acq_lock)
+ {
+ gfc_error ("Redundant ACQUIRED_LOCK tag found at %L ",
+ &tmp->where);
+ goto cleanup;
+ }
+ acq_lock = tmp;
+ saw_acq_lock = true;
+
+ m = gfc_match_char (',');
+ if (m == MATCH_YES)
+ continue;
+
+ tmp = NULL;
+ break;
+ }
+
+ break;
}
- if (gfc_match ("complex") == MATCH_YES)
+ if (m == MATCH_ERROR)
+ goto syntax;
+
+ if (gfc_match (" )%t") != MATCH_YES)
+ goto syntax;
+
+done:
+ switch (st)
{
- ts->type = BT_COMPLEX;
- ts->kind = gfc_default_complex_kind;
- goto kind_selector;
+ case ST_LOCK:
+ new_st.op = EXEC_LOCK;
+ break;
+ case ST_UNLOCK:
+ new_st.op = EXEC_UNLOCK;
+ break;
+ default:
+ gcc_unreachable ();
}
- if (gfc_match ("character") == MATCH_YES)
- {
- ts->type = BT_CHARACTER;
+ new_st.expr1 = lockvar;
+ new_st.expr2 = stat;
+ new_st.expr3 = errmsg;
+ new_st.expr4 = acq_lock;
- m = gfc_match_char_spec (ts);
+ return MATCH_YES;
- if (m == MATCH_NO)
- m = MATCH_YES;
+syntax:
+ gfc_syntax_error (st);
- return m;
- }
+cleanup:
+ gfc_free_expr (tmp);
+ gfc_free_expr (lockvar);
+ gfc_free_expr (acq_lock);
+ gfc_free_expr (stat);
+ gfc_free_expr (errmsg);
- if (gfc_match ("logical") == MATCH_YES)
- {
- ts->type = BT_LOGICAL;
- ts->kind = gfc_default_logical_kind;
- goto kind_selector;
- }
+ return MATCH_ERROR;
+}
- /* If a type is not matched, simply return MATCH_NO. */
- gfc_current_locus = old_locus;
- return MATCH_NO;
-kind_selector:
+match
+gfc_match_lock (void)
+{
+ if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: LOCK statement at %C")
+ == FAILURE)
+ return MATCH_ERROR;
- gfc_gobble_whitespace ();
- if (gfc_peek_ascii_char () == '*')
- {
- gfc_error ("Invalid type-spec at %C");
- return MATCH_ERROR;
- }
+ return lock_unlock_statement (ST_LOCK);
+}
- m = gfc_match_kind_spec (ts, false);
- if (m == MATCH_NO)
- m = MATCH_YES; /* No kind specifier found. */
+match
+gfc_match_unlock (void)
+{
+ if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: UNLOCK statement at %C")
+ == FAILURE)
+ return MATCH_ERROR;
- return m;
+ return lock_unlock_statement (ST_UNLOCK);
}
-/* Match an ALLOCATE 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_allocate (void)
+static match
+sync_statement (gfc_statement st)
{
- gfc_alloc *head, *tail;
- gfc_expr *stat, *errmsg, *tmp, *source, *mold;
- gfc_typespec ts;
- gfc_symbol *sym;
match m;
- 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 = mold = tmp = NULL;
- saw_stat = saw_errmsg = saw_source = saw_mold = saw_deferred = false;
+ gfc_expr *tmp, *imageset, *stat, *errmsg;
+ bool saw_stat, saw_errmsg;
- if (gfc_match_char ('(') != MATCH_YES)
- goto syntax;
+ tmp = imageset = stat = errmsg = NULL;
+ saw_stat = saw_errmsg = false;
- /* Match an optional type-spec. */
- old_locus = gfc_current_locus;
- m = match_type_spec (&ts);
- if (m == MATCH_ERROR)
- goto cleanup;
- else if (m == MATCH_NO)
+ if (gfc_pure (NULL))
{
- char name[GFC_MAX_SYMBOL_LEN + 3];
+ gfc_error ("Image control statement SYNC at %C in PURE procedure");
+ return MATCH_ERROR;
+ }
- if (gfc_match ("%n :: ", name) == MATCH_YES)
- {
- gfc_error ("Error in type-spec at %L", &old_locus);
- goto cleanup;
- }
+ if (gfc_implicit_pure (NULL))
+ gfc_current_ns->proc_name->attr.implicit_pure = 0;
- ts.type = BT_UNKNOWN;
- }
- else
+ if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: SYNC statement at %C")
+ == FAILURE)
+ return MATCH_ERROR;
+
+ if (gfc_option.coarray == GFC_FCOARRAY_NONE)
{
- if (gfc_match (" :: ") == MATCH_YES)
- {
- if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: typespec in "
- "ALLOCATE at %L", &old_locus) == FAILURE)
- goto cleanup;
+ gfc_fatal_error ("Coarrays disabled at %C, use -fcoarray= to enable");
+ return MATCH_ERROR;
+ }
- if (ts.deferred)
- {
- gfc_error ("Type-spec at %L cannot contain a deferred "
- "type parameter", &old_locus);
- goto cleanup;
- }
- }
- else
- {
- ts.type = BT_UNKNOWN;
- gfc_current_locus = old_locus;
- }
+ if (gfc_find_state (COMP_CRITICAL) == SUCCESS)
+ {
+ gfc_error ("Image control statement SYNC at %C in CRITICAL block");
+ return MATCH_ERROR;
}
- for (;;)
+ if (gfc_find_state (COMP_DO_CONCURRENT) == SUCCESS)
{
- if (head == NULL)
- head = tail = gfc_get_alloc ();
- else
- {
- tail->next = gfc_get_alloc ();
- tail = tail->next;
- }
+ gfc_error ("Image control statement SYNC at %C in DO CONCURRENT block");
+ return MATCH_ERROR;
+ }
- m = gfc_match_variable (&tail->expr, 0);
- if (m == MATCH_NO)
+ if (gfc_match_eos () == MATCH_YES)
+ {
+ if (st == ST_SYNC_IMAGES)
goto syntax;
- if (m == MATCH_ERROR)
- goto cleanup;
-
- if (gfc_check_do_variable (tail->expr->symtree))
- goto cleanup;
-
- if (gfc_pure (NULL) && gfc_impure_variable (tail->expr->symtree->n.sym))
- {
- gfc_error ("Bad allocate-object at %C for a PURE procedure");
- 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 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 F03:C627. */
- if (ts.kind != tail->expr->ts.kind)
- {
- gfc_error ("Kind type parameter for entity at %L differs from "
- "the kind type parameter of the typespec",
- &tail->expr->where);
- goto cleanup;
- }
- }
+ goto done;
+ }
- if (tail->expr->ts.type == BT_DERIVED)
- tail->expr->ts.u.derived = gfc_use_derived (tail->expr->ts.u.derived);
+ if (gfc_match_char ('(') != MATCH_YES)
+ goto syntax;
- /* 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));
- if (sym && sym->ts.type == BT_CLASS && sym->attr.class_ok)
- 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)
+ if (st == ST_SYNC_IMAGES)
+ {
+ /* Denote '*' as imageset == NULL. */
+ m = gfc_match_char ('*');
+ if (m == MATCH_ERROR)
+ goto syntax;
+ if (m == MATCH_NO)
{
- gfc_error ("Allocate-object at %L is not a nonprocedure pointer "
- "or an allocatable variable", &tail->expr->where);
- goto cleanup;
+ if (gfc_match ("%e", &imageset) != MATCH_YES)
+ goto syntax;
}
-
- if (gfc_peek_ascii_char () == '(' && !sym->attr.dimension)
+ m = gfc_match_char (',');
+ if (m == MATCH_ERROR)
+ goto syntax;
+ if (m == MATCH_NO)
{
- gfc_error ("Shape specification for allocatable scalar at %C");
- goto cleanup;
+ m = gfc_match_char (')');
+ if (m == MATCH_YES)
+ goto done;
+ goto syntax;
}
+ }
- if (gfc_match_char (',') != MATCH_YES)
- break;
-
-alloc_opt_list:
-
+ for (;;)
+ {
m = gfc_match (" stat = %v", &tmp);
if (m == MATCH_ERROR)
- goto cleanup;
+ goto syntax;
if (m == MATCH_YES)
{
- /* Enforce C630. */
if (saw_stat)
{
gfc_error ("Redundant STAT tag found at %L ", &tmp->where);
goto cleanup;
}
-
stat = tmp;
- tmp = NULL;
saw_stat = true;
- if (gfc_check_do_variable (stat->symtree))
- goto cleanup;
-
if (gfc_match_char (',') == MATCH_YES)
- goto alloc_opt_list;
+ continue;
+
+ tmp = NULL;
+ break;
}
m = gfc_match (" errmsg = %v", &tmp);
if (m == MATCH_ERROR)
- goto cleanup;
+ goto syntax;
if (m == MATCH_YES)
{
- if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ERRMSG tag at %L",
- &tmp->where) == FAILURE)
- goto cleanup;
-
- /* Enforce C630. */
if (saw_errmsg)
{
gfc_error ("Redundant ERRMSG tag found at %L ", &tmp->where);
goto cleanup;
}
-
errmsg = tmp;
- tmp = NULL;
saw_errmsg = true;
if (gfc_match_char (',') == MATCH_YES)
- goto alloc_opt_list;
+ continue;
+
+ tmp = NULL;
+ break;
}
- m = gfc_match (" source = %e", &tmp);
- if (m == MATCH_ERROR)
- goto cleanup;
- if (m == MATCH_YES)
+ break;
+ }
+
+ if (m == MATCH_ERROR)
+ 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_F2003, "Fortran 2003: SOURCE tag at %L",
- &tmp->where) == FAILURE)
- goto cleanup;
+ if (gfc_notify_std (GFC_STD_F95_DEL, "Deleted feature: ASSIGN "
+ "statement at %C")
+ == FAILURE)
+ return MATCH_ERROR;
- /* Enforce C630. */
- if (saw_source)
- {
- gfc_error ("Redundant SOURCE tag found at %L ", &tmp->where);
- goto cleanup;
- }
+ expr->symtree->n.sym->attr.assign = 1;
- /* The next 2 conditionals check C631. */
- if (ts.type != BT_UNKNOWN)
- {
- gfc_error ("SOURCE tag at %L conflicts with the typespec at %L",
- &tmp->where, &old_locus);
- goto cleanup;
- }
+ new_st.op = EXEC_LABEL_ASSIGN;
+ new_st.label1 = label;
+ new_st.expr1 = expr;
+ return MATCH_YES;
+ }
+ }
+ return MATCH_NO;
+}
- if (head->next)
- {
- gfc_error ("SOURCE tag at %L requires only a single entity in "
- "the allocation-list", &tmp->where);
- goto cleanup;
- }
- source = tmp;
- tmp = NULL;
- saw_source = true;
+/* 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. */
- if (gfc_match_char (',') == MATCH_YES)
- goto alloc_opt_list;
+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)
+ {
+ if (gfc_notify_std (GFC_STD_F95_DEL, "Deleted feature: Assigned GOTO "
+ "statement at %C")
+ == FAILURE)
+ return MATCH_ERROR;
+
+ new_st.op = EXEC_GOTO;
+ new_st.expr1 = expr;
+
+ if (gfc_match_eos () == MATCH_YES)
+ return MATCH_YES;
+
+ /* Match label list. */
+ gfc_match_char (',');
+ if (gfc_match_char ('(') != MATCH_YES)
+ {
+ gfc_syntax_error (ST_GOTO);
+ return MATCH_ERROR;
}
+ head = tail = NULL;
- m = gfc_match (" mold = %e", &tmp);
- if (m == MATCH_ERROR)
- goto cleanup;
- if (m == MATCH_YES)
+ do
{
- if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: MOLD tag at %L",
- &tmp->where) == FAILURE)
+ m = gfc_match_st_label (&label);
+ if (m != MATCH_YES)
+ goto syntax;
+
+ if (gfc_reference_st_label (label, ST_LABEL_TARGET) == FAILURE)
goto cleanup;
- /* Check F08:C636. */
- if (saw_mold)
- {
- gfc_error ("Redundant MOLD tag found at %L ", &tmp->where);
- goto cleanup;
- }
-
- /* Check F08:C637. */
- if (ts.type != BT_UNKNOWN)
+ if (head == NULL)
+ head = tail = gfc_get_code ();
+ else
{
- gfc_error ("MOLD tag at %L conflicts with the typespec at %L",
- &tmp->where, &old_locus);
- goto cleanup;
+ tail->block = gfc_get_code ();
+ tail = tail->block;
}
- mold = tmp;
- tmp = NULL;
- saw_mold = true;
- mold->mold = 1;
-
- if (gfc_match_char (',') == MATCH_YES)
- goto alloc_opt_list;
+ tail->label1 = label;
+ tail->op = EXEC_GOTO;
}
+ while (gfc_match_char (',') == MATCH_YES);
- gfc_gobble_whitespace ();
-
- if (gfc_peek_char () == ')')
- break;
- }
+ if (gfc_match (")%t") != MATCH_YES)
+ goto syntax;
- if (gfc_match (" )%t") != MATCH_YES)
- goto syntax;
+ if (head == NULL)
+ {
+ gfc_error ("Statement label list in GOTO at %C cannot be empty");
+ goto syntax;
+ }
+ new_st.block = head;
- /* Check F08:C637. */
- if (source && mold)
- {
- gfc_error ("MOLD tag at %L conflicts with SOURCE tag at %L",
- &mold->where, &source->where);
- goto cleanup;
+ return MATCH_YES;
}
- /* Check F03:C623, */
- if (saw_deferred && ts.type == BT_UNKNOWN && !source)
+ /* Last chance is a computed GO TO statement. */
+ if (gfc_match_char ('(') != MATCH_YES)
{
- gfc_error ("Allocate-object at %L with a deferred type parameter "
- "requires either a type-spec or SOURCE tag", &deferred_locus);
- goto cleanup;
+ gfc_syntax_error (ST_GOTO);
+ return MATCH_ERROR;
}
-
- new_st.op = EXEC_ALLOCATE;
- new_st.expr1 = stat;
- new_st.expr2 = errmsg;
- 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;
+ head = tail = NULL;
+ i = 1;
-syntax:
- gfc_syntax_error (ST_ALLOCATE);
+ do
+ {
+ m = gfc_match_st_label (&label);
+ if (m != MATCH_YES)
+ goto syntax;
-cleanup:
- gfc_free_expr (errmsg);
- gfc_free_expr (source);
- gfc_free_expr (stat);
- gfc_free_expr (mold);
- if (tmp && tmp->expr_type) gfc_free_expr (tmp);
- gfc_free_alloc_list (head);
- return MATCH_ERROR;
-}
+ if (gfc_reference_st_label (label, ST_LABEL_TARGET) == FAILURE)
+ goto cleanup;
+ if (head == NULL)
+ head = tail = gfc_get_code ();
+ else
+ {
+ tail->block = gfc_get_code ();
+ tail = tail->block;
+ }
-/* Match a NULLIFY statement. A NULLIFY statement is transformed into
- a set of pointer assignments to intrinsic NULL(). */
+ cp = gfc_get_case ();
+ cp->low = cp->high = gfc_get_int_expr (gfc_default_integer_kind,
+ NULL, i++);
-match
-gfc_match_nullify (void)
-{
- gfc_code *tail;
- gfc_expr *e, *p;
- match m;
+ tail->op = EXEC_SELECT;
+ tail->ext.block.case_list = cp;
- tail = NULL;
+ tail->next = gfc_get_code ();
+ tail->next->op = EXEC_GOTO;
+ tail->next->label1 = label;
+ }
+ while (gfc_match_char (',') == MATCH_YES);
- if (gfc_match_char ('(') != MATCH_YES)
+ if (gfc_match_char (')') != MATCH_YES)
goto syntax;
- for (;;)
+ if (head == NULL)
{
- m = gfc_match_variable (&p, 0);
- if (m == MATCH_ERROR)
- goto cleanup;
- if (m == MATCH_NO)
- goto syntax;
+ gfc_error ("Statement label list in GOTO at %C cannot be empty");
+ goto syntax;
+ }
- if (gfc_check_do_variable (p->symtree))
- goto cleanup;
+ /* Get the rest of the statement. */
+ gfc_match_char (',');
- /* build ' => NULL() '. */
- e = gfc_get_null_expr (&gfc_current_locus);
+ if (gfc_match (" %e%t", &expr) != MATCH_YES)
+ goto syntax;
- /* Chain to list. */
- if (tail == NULL)
- tail = &new_st;
- else
- {
- tail->next = gfc_get_code ();
- tail = tail->next;
- }
+ if (gfc_notify_std (GFC_STD_F95_OBS, "Obsolescent feature: Computed GOTO "
+ "at %C") == FAILURE)
+ return MATCH_ERROR;
- tail->op = EXEC_POINTER_ASSIGN;
- tail->expr1 = p;
- tail->expr2 = e;
+ /* At this point, a computed GOTO has been fully matched and an
+ equivalent SELECT statement constructed. */
- if (gfc_match (" )%t") == MATCH_YES)
- break;
- if (gfc_match_char (',') != MATCH_YES)
- goto syntax;
- }
+ new_st.op = EXEC_SELECT;
+ new_st.expr1 = NULL;
+ /* Hack: For a "real" SELECT, the expression is in expr. We put
+ it in expr2 so we can distinguish then and produce the correct
+ diagnostics. */
+ new_st.expr2 = expr;
+ new_st.block = head;
return MATCH_YES;
syntax:
- gfc_syntax_error (ST_NULLIFY);
-
+ gfc_syntax_error (ST_GOTO);
cleanup:
- gfc_free_statements (new_st.next);
- new_st.next = NULL;
- gfc_free_expr (new_st.expr1);
- new_st.expr1 = NULL;
- gfc_free_expr (new_st.expr2);
- new_st.expr2 = NULL;
+ gfc_free_statements (head);
return MATCH_ERROR;
}
-/* Match a DEALLOCATE statement. */
+/* Frees a list of gfc_alloc structures. */
+
+void
+gfc_free_alloc_list (gfc_alloc *p)
+{
+ gfc_alloc *q;
+
+ for (; p; p = q)
+ {
+ q = p->next;
+ gfc_free_expr (p->expr);
+ free (p);
+ }
+}
+
+
+/* Match an ALLOCATE statement. */
match
-gfc_match_deallocate (void)
+gfc_match_allocate (void)
{
gfc_alloc *head, *tail;
- gfc_expr *stat, *errmsg, *tmp;
+ gfc_expr *stat, *errmsg, *tmp, *source, *mold;
+ gfc_typespec ts;
gfc_symbol *sym;
match m;
- bool saw_stat, saw_errmsg, b1, b2;
+ locus old_locus, deferred_locus;
+ bool saw_stat, saw_errmsg, saw_source, saw_mold, saw_deferred, b1, b2, b3;
head = tail = NULL;
- stat = errmsg = tmp = NULL;
- saw_stat = saw_errmsg = 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 type-spec. */
+ old_locus = gfc_current_locus;
+ m = match_type_spec (&ts);
+ if (m == MATCH_ERROR)
+ goto cleanup;
+ else if (m == MATCH_NO)
+ {
+ 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
+ {
+ ts.type = BT_UNKNOWN;
+ gfc_current_locus = old_locus;
+ }
+ }
+
for (;;)
{
if (head == NULL)
}
m = gfc_match_variable (&tail->expr, 0);
- if (m == MATCH_ERROR)
- goto cleanup;
if (m == MATCH_NO)
goto syntax;
+ if (m == MATCH_ERROR)
+ goto cleanup;
if (gfc_check_do_variable (tail->expr->symtree))
goto cleanup;
- sym = tail->expr->symtree->n.sym;
-
- if (gfc_pure (NULL) && gfc_impure_variable (sym))
+ if (gfc_pure (NULL) && gfc_impure_variable (tail->expr->symtree->n.sym))
{
- gfc_error ("Illegal allocate-object at %C for a PURE procedure");
+ gfc_error ("Bad allocate-object at %C for a PURE procedure");
goto cleanup;
}
- /* FIXME: disable the checking on derived types. */
+ if (gfc_implicit_pure (NULL)
+ && gfc_impure_variable (tail->expr->symtree->n.sym))
+ gfc_current_ns->proc_name->attr.implicit_pure = 0;
+
+ if (tail->expr->ts.deferred)
+ {
+ saw_deferred = true;
+ deferred_locus = tail->expr->where;
+ }
+
+ if (gfc_find_state (COMP_DO_CONCURRENT) == SUCCESS
+ || gfc_find_state (COMP_CRITICAL) == SUCCESS)
+ {
+ gfc_ref *ref;
+ bool coarray = tail->expr->symtree->n.sym->attr.codimension;
+ for (ref = tail->expr->ref; ref; ref = ref->next)
+ if (ref->type == REF_COMPONENT)
+ coarray = ref->u.c.component->attr.codimension;
+
+ if (coarray && gfc_find_state (COMP_DO_CONCURRENT) == SUCCESS)
+ {
+ gfc_error ("ALLOCATE of coarray at %C in DO CONCURRENT block");
+ goto cleanup;
+ }
+ if (coarray && gfc_find_state (COMP_CRITICAL) == SUCCESS)
+ {
+ gfc_error ("ALLOCATE of coarray at %C in CRITICAL block");
+ goto cleanup;
+ }
+ }
+
+ /* The ALLOCATE statement had an optional typespec. Check the
+ constraints. */
+ if (ts.type != BT_UNKNOWN)
+ {
+ /* 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 F03:C627. */
+ if (ts.kind != tail->expr->ts.kind)
+ {
+ gfc_error ("Kind type parameter for entity at %L differs from "
+ "the kind type parameter of the typespec",
+ &tail->expr->where);
+ goto cleanup;
+ }
+ }
+
+ if (tail->expr->ts.type == BT_DERIVED)
+ 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));
- if (sym && sym->ts.type == BT_CLASS)
+ || tail->expr->ref->type == REF_ARRAY));
+ if (sym && sym->ts.type == BT_CLASS && sym->attr.class_ok)
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)
+ 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;
}
if (gfc_match_char (',') != MATCH_YES)
break;
-dealloc_opt_list:
+alloc_opt_list:
m = gfc_match (" stat = %v", &tmp);
if (m == MATCH_ERROR)
goto cleanup;
if (m == MATCH_YES)
{
+ /* Enforce C630. */
if (saw_stat)
{
gfc_error ("Redundant STAT tag found at %L ", &tmp->where);
- gfc_free_expr (tmp);
goto cleanup;
}
stat = tmp;
+ tmp = NULL;
saw_stat = true;
if (gfc_check_do_variable (stat->symtree))
goto cleanup;
if (gfc_match_char (',') == MATCH_YES)
- goto dealloc_opt_list;
+ goto alloc_opt_list;
}
m = gfc_match (" errmsg = %v", &tmp);
goto cleanup;
if (m == MATCH_YES)
{
- if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ERRMSG at %L",
+ if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ERRMSG tag at %L",
&tmp->where) == FAILURE)
goto cleanup;
+ /* Enforce C630. */
if (saw_errmsg)
{
gfc_error ("Redundant ERRMSG tag found at %L ", &tmp->where);
- gfc_free_expr (tmp);
goto cleanup;
}
errmsg = tmp;
+ tmp = NULL;
saw_errmsg = true;
if (gfc_match_char (',') == MATCH_YES)
- goto dealloc_opt_list;
- }
-
- gfc_gobble_whitespace ();
-
- if (gfc_peek_char () == ')')
- break;
- }
-
- if (gfc_match (" )%t") != MATCH_YES)
- goto syntax;
-
- new_st.op = EXEC_DEALLOCATE;
- new_st.expr1 = stat;
- new_st.expr2 = errmsg;
- new_st.ext.alloc.list = head;
-
- return MATCH_YES;
-
-syntax:
- gfc_syntax_error (ST_DEALLOCATE);
-
-cleanup:
- gfc_free_expr (errmsg);
- gfc_free_expr (stat);
- gfc_free_alloc_list (head);
- return MATCH_ERROR;
-}
-
-
-/* Match a RETURN statement. */
-
-match
-gfc_match_return (void)
-{
- gfc_expr *e;
- match m;
- 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;
-
- if (gfc_find_state (COMP_SUBROUTINE) == FAILURE)
- {
- gfc_error ("Alternate RETURN statement at %C is only allowed within "
- "a SUBROUTINE");
- goto cleanup;
- }
-
- if (gfc_notify_std (GFC_STD_F95_OBS, "Obsolescent feature: Alternate RETURN "
- "at %C") == FAILURE)
- return MATCH_ERROR;
-
- if (gfc_current_form == FORM_FREE)
- {
- /* The following are valid, so we can't require a blank after the
- RETURN keyword:
- return+1
- return(1) */
- char c = gfc_peek_ascii_char ();
- if (ISALPHA (c) || ISDIGIT (c))
- return MATCH_NO;
- }
-
- m = gfc_match (" %e%t", &e);
- if (m == MATCH_YES)
- goto done;
- if (m == MATCH_ERROR)
- goto cleanup;
-
- gfc_syntax_error (ST_RETURN);
-
-cleanup:
- gfc_free_expr (e);
- return MATCH_ERROR;
-
-done:
- gfc_enclosing_unit (&s);
- if (s == COMP_PROGRAM
- && gfc_notify_std (GFC_STD_GNU, "Extension: RETURN statement in "
- "main program at %C") == FAILURE)
- return MATCH_ERROR;
-
- new_st.op = EXEC_RETURN;
- new_st.expr1 = e;
-
- return MATCH_YES;
-}
-
-
-/* Match the call of a type-bound procedure, if CALL%var has already been
- matched and var found to be a derived-type variable. */
-
-static match
-match_typebound_call (gfc_symtree* varst)
-{
- gfc_expr* base;
- match m;
-
- base = gfc_get_expr ();
- base->expr_type = EXPR_VARIABLE;
- base->symtree = varst;
- base->where = gfc_current_locus;
- gfc_set_sym_referenced (varst->n.sym);
-
- m = gfc_match_varspec (base, 0, true, true);
- if (m == MATCH_NO)
- gfc_error ("Expected component reference at %C");
- if (m != MATCH_YES)
- return MATCH_ERROR;
-
- if (gfc_match_eos () != MATCH_YES)
- {
- gfc_error ("Junk after CALL at %C");
- return MATCH_ERROR;
- }
-
- if (base->expr_type == EXPR_COMPCALL)
- new_st.op = EXEC_COMPCALL;
- else if (base->expr_type == EXPR_PPC)
- new_st.op = EXEC_CALL_PPC;
- else
- {
- gfc_error ("Expected type-bound procedure or procedure pointer component "
- "at %C");
- return MATCH_ERROR;
- }
- new_st.expr1 = base;
-
- return MATCH_YES;
-}
-
-
-/* Match a CALL statement. The tricky part here are possible
- alternate return specifiers. We handle these by having all
- "subroutines" actually return an integer via a register that gives
- the return number. If the call specifies alternate returns, we
- generate code for a SELECT statement whose case clauses contain
- GOTOs to the various labels. */
-
-match
-gfc_match_call (void)
-{
- char name[GFC_MAX_SYMBOL_LEN + 1];
- gfc_actual_arglist *a, *arglist;
- gfc_case *new_case;
- gfc_symbol *sym;
- gfc_symtree *st;
- gfc_code *c;
- match m;
- int i;
-
- arglist = NULL;
-
- m = gfc_match ("% %n", name);
- if (m == MATCH_NO)
- goto syntax;
- if (m != MATCH_YES)
- return m;
-
- if (gfc_get_ha_sym_tree (name, &st))
- return MATCH_ERROR;
-
- sym = st->n.sym;
-
- /* If this is a variable of derived-type, it probably starts a type-bound
- procedure call. */
- 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
- right association is made. They are thrown out in resolution.)
- ... */
- if (!sym->attr.generic
- && !sym->attr.subroutine
- && !sym->attr.function)
- {
- if (!(sym->attr.external && !sym->attr.referenced))
- {
- /* ...create a symbol in this scope... */
- if (sym->ns != gfc_current_ns
- && gfc_get_sym_tree (name, NULL, &st, false) == 1)
- return MATCH_ERROR;
-
- if (sym != st->n.sym)
- sym = st->n.sym;
+ goto alloc_opt_list;
}
- /* ...and then to try to make the symbol into a subroutine. */
- if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE)
- return MATCH_ERROR;
- }
-
- gfc_set_sym_referenced (sym);
-
- if (gfc_match_eos () != MATCH_YES)
- {
- m = gfc_match_actual_arglist (1, &arglist);
- if (m == MATCH_NO)
- goto syntax;
+ m = gfc_match (" source = %e", &tmp);
if (m == MATCH_ERROR)
goto cleanup;
+ if (m == MATCH_YES)
+ {
+ if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: SOURCE tag at %L",
+ &tmp->where) == FAILURE)
+ goto cleanup;
- if (gfc_match_eos () != MATCH_YES)
- goto syntax;
- }
-
- /* If any alternate return labels were found, construct a SELECT
- statement that will jump to the right place. */
+ /* Enforce C630. */
+ if (saw_source)
+ {
+ gfc_error ("Redundant SOURCE tag found at %L ", &tmp->where);
+ goto cleanup;
+ }
- i = 0;
- for (a = arglist; a; a = a->next)
- if (a->expr == NULL)
- i = 1;
+ /* The next 2 conditionals check C631. */
+ if (ts.type != BT_UNKNOWN)
+ {
+ gfc_error ("SOURCE tag at %L conflicts with the typespec at %L",
+ &tmp->where, &old_locus);
+ goto cleanup;
+ }
- if (i)
- {
- gfc_symtree *select_st;
- gfc_symbol *select_sym;
- char name[GFC_MAX_SYMBOL_LEN + 1];
+ if (head->next)
+ {
+ gfc_error ("SOURCE tag at %L requires only a single entity in "
+ "the allocation-list", &tmp->where);
+ goto cleanup;
+ }
- new_st.next = c = gfc_get_code ();
- c->op = EXEC_SELECT;
- sprintf (name, "_result_%s", sym->name);
- gfc_get_ha_sym_tree (name, &select_st); /* Can't fail. */
+ source = tmp;
+ tmp = NULL;
+ saw_source = true;
- select_sym = select_st->n.sym;
- select_sym->ts.type = BT_INTEGER;
- select_sym->ts.kind = gfc_default_integer_kind;
- gfc_set_sym_referenced (select_sym);
- c->expr1 = gfc_get_expr ();
- c->expr1->expr_type = EXPR_VARIABLE;
- c->expr1->symtree = select_st;
- c->expr1->ts = select_sym->ts;
- c->expr1->where = gfc_current_locus;
+ if (gfc_match_char (',') == MATCH_YES)
+ goto alloc_opt_list;
+ }
- i = 0;
- for (a = arglist; a; a = a->next)
+ m = gfc_match (" mold = %e", &tmp);
+ if (m == MATCH_ERROR)
+ goto cleanup;
+ if (m == MATCH_YES)
{
- if (a->expr != NULL)
- continue;
+ if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: MOLD tag at %L",
+ &tmp->where) == FAILURE)
+ goto cleanup;
- if (gfc_reference_st_label (a->label, ST_LABEL_TARGET) == FAILURE)
- continue;
+ /* Check F08:C636. */
+ if (saw_mold)
+ {
+ gfc_error ("Redundant MOLD tag found at %L ", &tmp->where);
+ goto cleanup;
+ }
+
+ /* Check F08:C637. */
+ if (ts.type != BT_UNKNOWN)
+ {
+ gfc_error ("MOLD tag at %L conflicts with the typespec at %L",
+ &tmp->where, &old_locus);
+ goto cleanup;
+ }
- i++;
+ mold = tmp;
+ tmp = NULL;
+ saw_mold = true;
+ mold->mold = 1;
- c->block = gfc_get_code ();
- c = c->block;
- c->op = EXEC_SELECT;
+ if (gfc_match_char (',') == MATCH_YES)
+ goto alloc_opt_list;
+ }
- new_case = gfc_get_case ();
- 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;
+ gfc_gobble_whitespace ();
- c->next = gfc_get_code ();
- c->next->op = EXEC_GOTO;
- c->next->label1 = a->label;
- }
+ if (gfc_peek_char () == ')')
+ break;
}
- new_st.op = EXEC_CALL;
- new_st.symtree = st;
- new_st.ext.actual = arglist;
+ 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 && !mold)
+ {
+ gfc_error ("Allocate-object at %L with a deferred type parameter "
+ "requires either a type-spec or SOURCE tag or a MOLD tag",
+ &deferred_locus);
+ goto cleanup;
+ }
+
+ new_st.op = EXEC_ALLOCATE;
+ new_st.expr1 = stat;
+ new_st.expr2 = errmsg;
+ 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;
syntax:
- gfc_syntax_error (ST_CALL);
+ gfc_syntax_error (ST_ALLOCATE);
cleanup:
- gfc_free_actual_arglist (arglist);
+ gfc_free_expr (errmsg);
+ gfc_free_expr (source);
+ gfc_free_expr (stat);
+ gfc_free_expr (mold);
+ if (tmp && tmp->expr_type) gfc_free_expr (tmp);
+ gfc_free_alloc_list (head);
return MATCH_ERROR;
}
-/* Given a name, return a pointer to the common head structure,
- creating it if it does not exist. If FROM_MODULE is nonzero, we
- mangle the name so that it doesn't interfere with commons defined
- in the using namespace.
- TODO: Add to global symbol tree. */
+/* Match a NULLIFY statement. A NULLIFY statement is transformed into
+ a set of pointer assignments to intrinsic NULL(). */
-gfc_common_head *
-gfc_get_common (const char *name, int from_module)
+match
+gfc_match_nullify (void)
{
- gfc_symtree *st;
- static int serial = 0;
- char mangled_name[GFC_MAX_SYMBOL_LEN + 1];
+ gfc_code *tail;
+ gfc_expr *e, *p;
+ match m;
- if (from_module)
- {
- /* A use associated common block is only needed to correctly layout
- the variables it contains. */
- snprintf (mangled_name, GFC_MAX_SYMBOL_LEN, "_%d_%s", serial++, name);
- st = gfc_new_symtree (&gfc_current_ns->common_root, mangled_name);
- }
- else
- {
- st = gfc_find_symtree (gfc_current_ns->common_root, name);
+ tail = NULL;
- if (st == NULL)
- st = gfc_new_symtree (&gfc_current_ns->common_root, name);
- }
+ if (gfc_match_char ('(') != MATCH_YES)
+ goto syntax;
- if (st->n.common == NULL)
+ for (;;)
{
- st->n.common = gfc_get_common_head ();
- st->n.common->where = gfc_current_locus;
- strcpy (st->n.common->name, name);
- }
+ m = gfc_match_variable (&p, 0);
+ if (m == MATCH_ERROR)
+ goto cleanup;
+ if (m == MATCH_NO)
+ goto syntax;
- return st->n.common;
-}
+ if (gfc_check_do_variable (p->symtree))
+ goto cleanup;
+ /* F2008, C1242. */
+ if (gfc_is_coindexed (p))
+ {
+ gfc_error ("Pointer object at %C shall not be conindexed");
+ goto cleanup;
+ }
-/* Match a common block name. */
+ /* build ' => NULL() '. */
+ e = gfc_get_null_expr (&gfc_current_locus);
-match match_common_name (char *name)
-{
- match m;
+ /* Chain to list. */
+ if (tail == NULL)
+ tail = &new_st;
+ else
+ {
+ tail->next = gfc_get_code ();
+ tail = tail->next;
+ }
- if (gfc_match_char ('/') == MATCH_NO)
- {
- name[0] = '\0';
- return MATCH_YES;
- }
+ tail->op = EXEC_POINTER_ASSIGN;
+ tail->expr1 = p;
+ tail->expr2 = e;
- if (gfc_match_char ('/') == MATCH_YES)
- {
- name[0] = '\0';
- return MATCH_YES;
+ if (gfc_match (" )%t") == MATCH_YES)
+ break;
+ if (gfc_match_char (',') != MATCH_YES)
+ goto syntax;
}
- m = gfc_match_name (name);
+ return MATCH_YES;
- if (m == MATCH_ERROR)
- return MATCH_ERROR;
- if (m == MATCH_YES && gfc_match_char ('/') == MATCH_YES)
- return MATCH_YES;
+syntax:
+ gfc_syntax_error (ST_NULLIFY);
- gfc_error ("Syntax error in common block name at %C");
+cleanup:
+ gfc_free_statements (new_st.next);
+ new_st.next = NULL;
+ gfc_free_expr (new_st.expr1);
+ new_st.expr1 = NULL;
+ gfc_free_expr (new_st.expr2);
+ new_st.expr2 = NULL;
return MATCH_ERROR;
}
-/* Match a COMMON statement. */
+/* Match a DEALLOCATE statement. */
match
-gfc_match_common (void)
+gfc_match_deallocate (void)
{
- gfc_symbol *sym, **head, *tail, *other, *old_blank_common;
- char name[GFC_MAX_SYMBOL_LEN + 1];
- gfc_common_head *t;
- gfc_array_spec *as;
- gfc_equiv *e1, *e2;
+ gfc_alloc *head, *tail;
+ gfc_expr *stat, *errmsg, *tmp;
+ gfc_symbol *sym;
match m;
- gfc_gsymbol *gsym;
-
- old_blank_common = gfc_current_ns->blank_common.head;
- if (old_blank_common)
- {
- while (old_blank_common->common_next)
- old_blank_common = old_blank_common->common_next;
- }
+ bool saw_stat, saw_errmsg, b1, b2;
- as = NULL;
+ head = tail = NULL;
+ stat = errmsg = tmp = NULL;
+ saw_stat = saw_errmsg = false;
+
+ if (gfc_match_char ('(') != MATCH_YES)
+ goto syntax;
for (;;)
{
- m = match_common_name (name);
+ if (head == NULL)
+ head = tail = gfc_get_alloc ();
+ else
+ {
+ tail->next = gfc_get_alloc ();
+ tail = tail->next;
+ }
+
+ m = gfc_match_variable (&tail->expr, 0);
if (m == MATCH_ERROR)
goto cleanup;
+ if (m == MATCH_NO)
+ goto syntax;
- gsym = gfc_get_gsymbol (name);
- if (gsym->type != GSYM_UNKNOWN && gsym->type != GSYM_COMMON)
- {
- gfc_error ("Symbol '%s' at %C is already an external symbol that "
- "is not COMMON", name);
- goto cleanup;
- }
+ if (gfc_check_do_variable (tail->expr->symtree))
+ goto cleanup;
- if (gsym->type == GSYM_UNKNOWN)
+ sym = tail->expr->symtree->n.sym;
+
+ if (gfc_pure (NULL) && gfc_impure_variable (sym))
{
- gsym->type = GSYM_COMMON;
- gsym->where = gfc_current_locus;
- gsym->defined = 1;
+ gfc_error ("Illegal allocate-object at %C for a PURE procedure");
+ goto cleanup;
}
- gsym->used = 1;
+ if (gfc_implicit_pure (NULL) && gfc_impure_variable (sym))
+ gfc_current_ns->proc_name->attr.implicit_pure = 0;
- if (name[0] == '\0')
+ if (gfc_is_coarray (tail->expr)
+ && gfc_find_state (COMP_DO_CONCURRENT) == SUCCESS)
{
- t = &gfc_current_ns->blank_common;
- if (t->head == NULL)
- t->where = gfc_current_locus;
+ gfc_error ("DEALLOCATE of coarray at %C in DO CONCURRENT block");
+ goto cleanup;
}
- else
+
+ if (gfc_is_coarray (tail->expr)
+ && gfc_find_state (COMP_CRITICAL) == SUCCESS)
{
- t = gfc_get_common (name, 0);
+ gfc_error ("DEALLOCATE of coarray at %C in CRITICAL block");
+ goto cleanup;
}
- head = &t->head;
- if (*head == NULL)
- tail = NULL;
+ /* FIXME: disable the checking on derived types. */
+ b1 = !(tail->expr->ref
+ && (tail->expr->ref->type == REF_COMPONENT
+ || 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)
{
- tail = *head;
- while (tail->common_next)
- tail = tail->common_next;
+ gfc_error ("Allocate-object at %C is not a nonprocedure pointer "
+ "or an allocatable variable");
+ goto cleanup;
}
- /* Grab the list of symbols. */
- for (;;)
- {
- m = gfc_match_symbol (&sym, 0);
- if (m == MATCH_ERROR)
- goto cleanup;
- if (m == MATCH_NO)
- goto syntax;
+ if (gfc_match_char (',') != MATCH_YES)
+ break;
- /* Store a ref to the common block for error checking. */
- sym->common_block = t;
-
- /* See if we know the current common block is bind(c), and if
- so, then see if we can check if the symbol is (which it'll
- need to be). This can happen if the bind(c) attr stmt was
- applied to the common block, and the variable(s) already
- defined, before declaring the common block. */
- if (t->is_bind_c == 1)
- {
- if (sym->ts.type != BT_UNKNOWN && sym->ts.is_c_interop != 1)
- {
- /* If we find an error, just print it and continue,
- cause it's just semantic, and we can see if there
- are more errors. */
- gfc_error_now ("Variable '%s' at %L in common block '%s' "
- "at %C must be declared with a C "
- "interoperable kind since common block "
- "'%s' is bind(c)",
- sym->name, &(sym->declared_at), t->name,
- t->name);
- }
-
- if (sym->attr.is_bind_c == 1)
- gfc_error_now ("Variable '%s' in common block "
- "'%s' at %C can not be bind(c) since "
- "it is not global", sym->name, t->name);
- }
-
- if (sym->attr.in_common)
+dealloc_opt_list:
+
+ m = gfc_match (" stat = %v", &tmp);
+ if (m == MATCH_ERROR)
+ goto cleanup;
+ if (m == MATCH_YES)
+ {
+ if (saw_stat)
{
- gfc_error ("Symbol '%s' at %C is already in a COMMON block",
- sym->name);
+ gfc_error ("Redundant STAT tag found at %L ", &tmp->where);
+ gfc_free_expr (tmp);
goto cleanup;
}
- if (((sym->value != NULL && sym->value->expr_type != EXPR_NULL)
- || sym->attr.data) && gfc_current_state () != COMP_BLOCK_DATA)
- {
- if (gfc_notify_std (GFC_STD_GNU, "Initialized symbol '%s' at %C "
- "can only be COMMON in "
- "BLOCK DATA", sym->name)
- == FAILURE)
- goto cleanup;
- }
+ stat = tmp;
+ saw_stat = true;
- if (gfc_add_in_common (&sym->attr, sym->name, NULL) == FAILURE)
+ if (gfc_check_do_variable (stat->symtree))
goto cleanup;
- if (tail != NULL)
- tail->common_next = sym;
- else
- *head = sym;
-
- tail = sym;
+ if (gfc_match_char (',') == MATCH_YES)
+ goto dealloc_opt_list;
+ }
- /* Deal with an optional array specification after the
- symbol name. */
- m = gfc_match_array_spec (&as, true, true);
- if (m == MATCH_ERROR)
+ m = gfc_match (" errmsg = %v", &tmp);
+ if (m == MATCH_ERROR)
+ goto cleanup;
+ if (m == MATCH_YES)
+ {
+ if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ERRMSG at %L",
+ &tmp->where) == FAILURE)
goto cleanup;
- if (m == MATCH_YES)
+ if (saw_errmsg)
{
- if (as->type != AS_EXPLICIT)
- {
- gfc_error ("Array specification for symbol '%s' in COMMON "
- "at %C must be explicit", sym->name);
- goto cleanup;
- }
-
- if (gfc_add_dimension (&sym->attr, sym->name, NULL) == FAILURE)
- goto cleanup;
-
- if (sym->attr.pointer)
- {
- gfc_error ("Symbol '%s' in COMMON at %C cannot be a "
- "POINTER array", sym->name);
- goto cleanup;
- }
-
- sym->as = as;
- as = NULL;
-
+ gfc_error ("Redundant ERRMSG tag found at %L ", &tmp->where);
+ gfc_free_expr (tmp);
+ goto cleanup;
}
- sym->common_head = t;
-
- /* Check to see if the symbol is already in an equivalence group.
- If it is, set the other members as being in common. */
- if (sym->attr.in_equivalence)
- {
- for (e1 = gfc_current_ns->equiv; e1; e1 = e1->next)
- {
- for (e2 = e1; e2; e2 = e2->eq)
- if (e2->expr->symtree->n.sym == sym)
- goto equiv_found;
+ errmsg = tmp;
+ saw_errmsg = true;
- continue;
+ if (gfc_match_char (',') == MATCH_YES)
+ goto dealloc_opt_list;
+ }
- equiv_found:
+ gfc_gobble_whitespace ();
- for (e2 = e1; e2; e2 = e2->eq)
- {
- other = e2->expr->symtree->n.sym;
- if (other->common_head
- && other->common_head != sym->common_head)
- {
- gfc_error ("Symbol '%s', in COMMON block '%s' at "
- "%C is being indirectly equivalenced to "
- "another COMMON block '%s'",
- sym->name, sym->common_head->name,
- other->common_head->name);
- goto cleanup;
- }
- other->attr.in_common = 1;
- other->common_head = t;
- }
- }
- }
+ if (gfc_peek_char () == ')')
+ break;
+ }
+ if (gfc_match (" )%t") != MATCH_YES)
+ goto syntax;
- gfc_gobble_whitespace ();
- if (gfc_match_eos () == MATCH_YES)
- goto done;
- if (gfc_peek_ascii_char () == '/')
- break;
- if (gfc_match_char (',') != MATCH_YES)
- goto syntax;
- gfc_gobble_whitespace ();
- if (gfc_peek_ascii_char () == '/')
- break;
- }
- }
+ new_st.op = EXEC_DEALLOCATE;
+ new_st.expr1 = stat;
+ new_st.expr2 = errmsg;
+ new_st.ext.alloc.list = head;
-done:
return MATCH_YES;
syntax:
- gfc_syntax_error (ST_COMMON);
+ gfc_syntax_error (ST_DEALLOCATE);
cleanup:
- if (old_blank_common)
- old_blank_common->common_next = NULL;
- else
- gfc_current_ns->blank_common.head = NULL;
- gfc_free_array_spec (as);
+ gfc_free_expr (errmsg);
+ gfc_free_expr (stat);
+ gfc_free_alloc_list (head);
return MATCH_ERROR;
}
-/* Match a BLOCK DATA program unit. */
+/* Match a RETURN statement. */
+
+match
+gfc_match_return (void)
+{
+ gfc_expr *e;
+ match m;
+ 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;
+ }
-match
-gfc_match_block_data (void)
-{
- char name[GFC_MAX_SYMBOL_LEN + 1];
- gfc_symbol *sym;
- match m;
+ if (gfc_find_state (COMP_DO_CONCURRENT) == SUCCESS)
+ {
+ gfc_error ("Image control statement RETURN at %C in DO CONCURRENT block");
+ return MATCH_ERROR;
+ }
if (gfc_match_eos () == MATCH_YES)
+ goto done;
+
+ if (gfc_find_state (COMP_SUBROUTINE) == FAILURE)
{
- gfc_new_block = NULL;
- return MATCH_YES;
+ gfc_error ("Alternate RETURN statement at %C is only allowed within "
+ "a SUBROUTINE");
+ goto cleanup;
}
- m = gfc_match ("% %n%t", name);
- if (m != MATCH_YES)
+ if (gfc_notify_std (GFC_STD_F95_OBS, "Obsolescent feature: Alternate RETURN "
+ "at %C") == FAILURE)
return MATCH_ERROR;
- if (gfc_get_symbol (name, NULL, &sym))
- return MATCH_ERROR;
+ if (gfc_current_form == FORM_FREE)
+ {
+ /* The following are valid, so we can't require a blank after the
+ RETURN keyword:
+ return+1
+ return(1) */
+ char c = gfc_peek_ascii_char ();
+ if (ISALPHA (c) || ISDIGIT (c))
+ return MATCH_NO;
+ }
- if (gfc_add_flavor (&sym->attr, FL_BLOCK_DATA, sym->name, NULL) == FAILURE)
- return MATCH_ERROR;
+ m = gfc_match (" %e%t", &e);
+ if (m == MATCH_YES)
+ goto done;
+ if (m == MATCH_ERROR)
+ goto cleanup;
- gfc_new_block = sym;
+ gfc_syntax_error (ST_RETURN);
+
+cleanup:
+ gfc_free_expr (e);
+ return MATCH_ERROR;
+
+done:
+ gfc_enclosing_unit (&s);
+ if (s == COMP_PROGRAM
+ && gfc_notify_std (GFC_STD_GNU, "Extension: RETURN statement in "
+ "main program at %C") == FAILURE)
+ return MATCH_ERROR;
+
+ new_st.op = EXEC_RETURN;
+ new_st.expr1 = e;
return MATCH_YES;
}
-/* Free a namelist structure. */
+/* Match the call of a type-bound procedure, if CALL%var has already been
+ matched and var found to be a derived-type variable. */
-void
-gfc_free_namelist (gfc_namelist *name)
+static match
+match_typebound_call (gfc_symtree* varst)
{
- gfc_namelist *n;
+ gfc_expr* base;
+ match m;
- for (; name; name = n)
+ base = gfc_get_expr ();
+ base->expr_type = EXPR_VARIABLE;
+ base->symtree = varst;
+ base->where = gfc_current_locus;
+ gfc_set_sym_referenced (varst->n.sym);
+
+ m = gfc_match_varspec (base, 0, true, true);
+ if (m == MATCH_NO)
+ gfc_error ("Expected component reference at %C");
+ if (m != MATCH_YES)
+ return MATCH_ERROR;
+
+ if (gfc_match_eos () != MATCH_YES)
{
- n = name->next;
- gfc_free (name);
+ gfc_error ("Junk after CALL at %C");
+ return MATCH_ERROR;
+ }
+
+ if (base->expr_type == EXPR_COMPCALL)
+ new_st.op = EXEC_COMPCALL;
+ else if (base->expr_type == EXPR_PPC)
+ new_st.op = EXEC_CALL_PPC;
+ else
+ {
+ gfc_error ("Expected type-bound procedure or procedure pointer component "
+ "at %C");
+ return MATCH_ERROR;
}
+ new_st.expr1 = base;
+
+ return MATCH_YES;
}
-/* Match a NAMELIST statement. */
+/* Match a CALL statement. The tricky part here are possible
+ alternate return specifiers. We handle these by having all
+ "subroutines" actually return an integer via a register that gives
+ the return number. If the call specifies alternate returns, we
+ generate code for a SELECT statement whose case clauses contain
+ GOTOs to the various labels. */
match
-gfc_match_namelist (void)
+gfc_match_call (void)
{
- gfc_symbol *group_name, *sym;
- gfc_namelist *nl;
- match m, m2;
+ char name[GFC_MAX_SYMBOL_LEN + 1];
+ gfc_actual_arglist *a, *arglist;
+ gfc_case *new_case;
+ gfc_symbol *sym;
+ gfc_symtree *st;
+ gfc_code *c;
+ match m;
+ int i;
- m = gfc_match (" / %s /", &group_name);
+ arglist = NULL;
+
+ m = gfc_match ("% %n", name);
if (m == MATCH_NO)
goto syntax;
- if (m == MATCH_ERROR)
- goto error;
+ if (m != MATCH_YES)
+ return m;
- for (;;)
+ if (gfc_get_ha_sym_tree (name, &st))
+ return MATCH_ERROR;
+
+ sym = st->n.sym;
+
+ /* If this is a variable of derived-type, it probably starts a type-bound
+ procedure call. */
+ 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
+ right association is made. They are thrown out in resolution.)
+ ... */
+ if (!sym->attr.generic
+ && !sym->attr.subroutine
+ && !sym->attr.function)
{
- if (group_name->ts.type != BT_UNKNOWN)
+ if (!(sym->attr.external && !sym->attr.referenced))
{
- gfc_error ("Namelist group name '%s' at %C already has a basic "
- "type of %s", group_name->name,
- gfc_typename (&group_name->ts));
- return MATCH_ERROR;
+ /* ...create a symbol in this scope... */
+ if (sym->ns != gfc_current_ns
+ && gfc_get_sym_tree (name, NULL, &st, false) == 1)
+ return MATCH_ERROR;
+
+ if (sym != st->n.sym)
+ sym = st->n.sym;
}
- if (group_name->attr.flavor == FL_NAMELIST
- && group_name->attr.use_assoc
- && gfc_notify_std (GFC_STD_GNU, "Namelist group name '%s' "
- "at %C already is USE associated and can"
- "not be respecified.", group_name->name)
- == FAILURE)
+ /* ...and then to try to make the symbol into a subroutine. */
+ if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE)
return MATCH_ERROR;
+ }
- if (group_name->attr.flavor != FL_NAMELIST
- && gfc_add_flavor (&group_name->attr, FL_NAMELIST,
- group_name->name, NULL) == FAILURE)
- return MATCH_ERROR;
+ gfc_set_sym_referenced (sym);
- for (;;)
- {
- m = gfc_match_symbol (&sym, 1);
- if (m == MATCH_NO)
- goto syntax;
- if (m == MATCH_ERROR)
- goto error;
+ if (gfc_match_eos () != MATCH_YES)
+ {
+ m = gfc_match_actual_arglist (1, &arglist);
+ if (m == MATCH_NO)
+ goto syntax;
+ if (m == MATCH_ERROR)
+ goto cleanup;
- if (sym->attr.in_namelist == 0
- && gfc_add_in_namelist (&sym->attr, sym->name, NULL) == FAILURE)
- goto error;
+ if (gfc_match_eos () != MATCH_YES)
+ goto syntax;
+ }
- /* Use gfc_error_check here, rather than goto error, so that
- these are the only errors for the next two lines. */
- if (sym->as && sym->as->type == AS_ASSUMED_SIZE)
- {
- gfc_error ("Assumed size array '%s' in namelist '%s' at "
- "%C is not allowed", sym->name, group_name->name);
- gfc_error_check ();
- }
+ /* If any alternate return labels were found, construct a SELECT
+ statement that will jump to the right place. */
- if (sym->ts.type == BT_CHARACTER && sym->ts.u.cl->length == NULL)
- {
- gfc_error ("Assumed character length '%s' in namelist '%s' at "
- "%C is not allowed", sym->name, group_name->name);
- gfc_error_check ();
- }
+ i = 0;
+ for (a = arglist; a; a = a->next)
+ if (a->expr == NULL)
+ i = 1;
- nl = gfc_get_namelist ();
- nl->sym = sym;
- sym->refs++;
+ if (i)
+ {
+ gfc_symtree *select_st;
+ gfc_symbol *select_sym;
+ char name[GFC_MAX_SYMBOL_LEN + 1];
- if (group_name->namelist == NULL)
- group_name->namelist = group_name->namelist_tail = nl;
- else
- {
- group_name->namelist_tail->next = nl;
- group_name->namelist_tail = nl;
- }
+ new_st.next = c = gfc_get_code ();
+ c->op = EXEC_SELECT;
+ sprintf (name, "_result_%s", sym->name);
+ gfc_get_ha_sym_tree (name, &select_st); /* Can't fail. */
- if (gfc_match_eos () == MATCH_YES)
- goto done;
+ select_sym = select_st->n.sym;
+ select_sym->ts.type = BT_INTEGER;
+ select_sym->ts.kind = gfc_default_integer_kind;
+ gfc_set_sym_referenced (select_sym);
+ c->expr1 = gfc_get_expr ();
+ c->expr1->expr_type = EXPR_VARIABLE;
+ c->expr1->symtree = select_st;
+ c->expr1->ts = select_sym->ts;
+ c->expr1->where = gfc_current_locus;
+
+ i = 0;
+ for (a = arglist; a; a = a->next)
+ {
+ if (a->expr != NULL)
+ continue;
+
+ if (gfc_reference_st_label (a->label, ST_LABEL_TARGET) == FAILURE)
+ continue;
+
+ i++;
- m = gfc_match_char (',');
+ c->block = gfc_get_code ();
+ c = c->block;
+ c->op = EXEC_SELECT;
- if (gfc_match_char ('/') == MATCH_YES)
- {
- m2 = gfc_match (" %s /", &group_name);
- if (m2 == MATCH_YES)
- break;
- if (m2 == MATCH_ERROR)
- goto error;
- goto syntax;
- }
+ new_case = gfc_get_case ();
+ new_case->high = gfc_get_int_expr (gfc_default_integer_kind, NULL, i);
+ new_case->low = new_case->high;
+ c->ext.block.case_list = new_case;
- if (m != MATCH_YES)
- goto syntax;
+ c->next = gfc_get_code ();
+ c->next->op = EXEC_GOTO;
+ c->next->label1 = a->label;
}
}
-done:
+ new_st.op = EXEC_CALL;
+ new_st.symtree = st;
+ new_st.ext.actual = arglist;
+
return MATCH_YES;
syntax:
- gfc_syntax_error (ST_NAMELIST);
+ gfc_syntax_error (ST_CALL);
-error:
+cleanup:
+ gfc_free_actual_arglist (arglist);
return MATCH_ERROR;
}
-/* Match a MODULE statement. */
+/* Given a name, return a pointer to the common head structure,
+ creating it if it does not exist. If FROM_MODULE is nonzero, we
+ mangle the name so that it doesn't interfere with commons defined
+ in the using namespace.
+ TODO: Add to global symbol tree. */
-match
-gfc_match_module (void)
+gfc_common_head *
+gfc_get_common (const char *name, int from_module)
{
- match m;
+ gfc_symtree *st;
+ static int serial = 0;
+ char mangled_name[GFC_MAX_SYMBOL_LEN + 1];
- m = gfc_match (" %s%t", &gfc_new_block);
- if (m != MATCH_YES)
- return m;
+ if (from_module)
+ {
+ /* A use associated common block is only needed to correctly layout
+ the variables it contains. */
+ snprintf (mangled_name, GFC_MAX_SYMBOL_LEN, "_%d_%s", serial++, name);
+ st = gfc_new_symtree (&gfc_current_ns->common_root, mangled_name);
+ }
+ else
+ {
+ st = gfc_find_symtree (gfc_current_ns->common_root, name);
- if (gfc_add_flavor (&gfc_new_block->attr, FL_MODULE,
- gfc_new_block->name, NULL) == FAILURE)
- return MATCH_ERROR;
+ if (st == NULL)
+ st = gfc_new_symtree (&gfc_current_ns->common_root, name);
+ }
- return MATCH_YES;
+ if (st->n.common == NULL)
+ {
+ st->n.common = gfc_get_common_head ();
+ st->n.common->where = gfc_current_locus;
+ strcpy (st->n.common->name, name);
+ }
+
+ return st->n.common;
}
-/* Free equivalence sets and lists. Recursively is the easiest way to
- do this. */
+/* Match a common block name. */
-void
-gfc_free_equiv_until (gfc_equiv *eq, gfc_equiv *stop)
+match match_common_name (char *name)
{
- if (eq == stop)
- return;
+ match m;
- gfc_free_equiv (eq->eq);
- gfc_free_equiv_until (eq->next, stop);
- gfc_free_expr (eq->expr);
- gfc_free (eq);
-}
+ if (gfc_match_char ('/') == MATCH_NO)
+ {
+ name[0] = '\0';
+ return MATCH_YES;
+ }
+
+ if (gfc_match_char ('/') == MATCH_YES)
+ {
+ name[0] = '\0';
+ return MATCH_YES;
+ }
+ m = gfc_match_name (name);
-void
-gfc_free_equiv (gfc_equiv *eq)
-{
- gfc_free_equiv_until (eq, NULL);
+ if (m == MATCH_ERROR)
+ return MATCH_ERROR;
+ if (m == MATCH_YES && gfc_match_char ('/') == MATCH_YES)
+ return MATCH_YES;
+
+ gfc_error ("Syntax error in common block name at %C");
+ return MATCH_ERROR;
}
-/* Match an EQUIVALENCE statement. */
+/* Match a COMMON statement. */
match
-gfc_match_equivalence (void)
+gfc_match_common (void)
{
- gfc_equiv *eq, *set, *tail;
- gfc_ref *ref;
- gfc_symbol *sym;
+ gfc_symbol *sym, **head, *tail, *other, *old_blank_common;
+ char name[GFC_MAX_SYMBOL_LEN + 1];
+ gfc_common_head *t;
+ gfc_array_spec *as;
+ gfc_equiv *e1, *e2;
match m;
- gfc_common_head *common_head = NULL;
- bool common_flag;
- int cnt;
+ gfc_gsymbol *gsym;
- tail = NULL;
+ old_blank_common = gfc_current_ns->blank_common.head;
+ if (old_blank_common)
+ {
+ while (old_blank_common->common_next)
+ old_blank_common = old_blank_common->common_next;
+ }
+
+ as = NULL;
for (;;)
{
- eq = gfc_get_equiv ();
- if (tail == NULL)
- tail = eq;
+ m = match_common_name (name);
+ if (m == MATCH_ERROR)
+ goto cleanup;
- eq->next = gfc_current_ns->equiv;
- gfc_current_ns->equiv = eq;
+ gsym = gfc_get_gsymbol (name);
+ if (gsym->type != GSYM_UNKNOWN && gsym->type != GSYM_COMMON)
+ {
+ gfc_error ("Symbol '%s' at %C is already an external symbol that "
+ "is not COMMON", name);
+ goto cleanup;
+ }
- if (gfc_match_char ('(') != MATCH_YES)
- goto syntax;
+ if (gsym->type == GSYM_UNKNOWN)
+ {
+ gsym->type = GSYM_COMMON;
+ gsym->where = gfc_current_locus;
+ gsym->defined = 1;
+ }
- set = eq;
- common_flag = FALSE;
- cnt = 0;
+ gsym->used = 1;
+
+ if (name[0] == '\0')
+ {
+ t = &gfc_current_ns->blank_common;
+ if (t->head == NULL)
+ t->where = gfc_current_locus;
+ }
+ else
+ {
+ t = gfc_get_common (name, 0);
+ }
+ head = &t->head;
+
+ if (*head == NULL)
+ tail = NULL;
+ else
+ {
+ tail = *head;
+ while (tail->common_next)
+ tail = tail->common_next;
+ }
+ /* Grab the list of symbols. */
for (;;)
{
- m = gfc_match_equiv_variable (&set->expr);
+ m = gfc_match_symbol (&sym, 0);
if (m == MATCH_ERROR)
goto cleanup;
if (m == MATCH_NO)
goto syntax;
- /* count the number of objects. */
- cnt++;
-
- if (gfc_match_char ('%') == MATCH_YES)
- {
- gfc_error ("Derived type component %C is not a "
- "permitted EQUIVALENCE member");
- goto cleanup;
- }
-
- for (ref = set->expr->ref; ref; ref = ref->next)
- if (ref->type == REF_ARRAY && ref->u.ar.type == AR_SECTION)
- {
- gfc_error ("Array reference in EQUIVALENCE at %C cannot "
- "be an array section");
- goto cleanup;
- }
-
- sym = set->expr->symtree->n.sym;
-
- if (gfc_add_in_equivalence (&sym->attr, sym->name, NULL) == FAILURE)
- goto cleanup;
-
- if (sym->attr.in_common)
- {
- common_flag = TRUE;
- common_head = sym->common_head;
- }
-
- if (gfc_match_char (')') == MATCH_YES)
- break;
-
- if (gfc_match_char (',') != MATCH_YES)
- goto syntax;
-
- set->eq = gfc_get_equiv ();
- set = set->eq;
- }
-
- if (cnt < 2)
- {
- gfc_error ("EQUIVALENCE at %C requires two or more objects");
- goto cleanup;
- }
+ /* Store a ref to the common block for error checking. */
+ sym->common_block = t;
+
+ /* See if we know the current common block is bind(c), and if
+ so, then see if we can check if the symbol is (which it'll
+ need to be). This can happen if the bind(c) attr stmt was
+ applied to the common block, and the variable(s) already
+ defined, before declaring the common block. */
+ if (t->is_bind_c == 1)
+ {
+ if (sym->ts.type != BT_UNKNOWN && sym->ts.is_c_interop != 1)
+ {
+ /* If we find an error, just print it and continue,
+ cause it's just semantic, and we can see if there
+ are more errors. */
+ gfc_error_now ("Variable '%s' at %L in common block '%s' "
+ "at %C must be declared with a C "
+ "interoperable kind since common block "
+ "'%s' is bind(c)",
+ sym->name, &(sym->declared_at), t->name,
+ t->name);
+ }
+
+ if (sym->attr.is_bind_c == 1)
+ gfc_error_now ("Variable '%s' in common block "
+ "'%s' at %C can not be bind(c) since "
+ "it is not global", sym->name, t->name);
+ }
+
+ if (sym->attr.in_common)
+ {
+ gfc_error ("Symbol '%s' at %C is already in a COMMON block",
+ sym->name);
+ goto cleanup;
+ }
- /* If one of the members of an equivalence is in common, then
- mark them all as being in common. Before doing this, check
- that members of the equivalence group are not in different
- common blocks. */
- if (common_flag)
- for (set = eq; set; set = set->eq)
- {
- sym = set->expr->symtree->n.sym;
- if (sym->common_head && sym->common_head != common_head)
- {
- gfc_error ("Attempt to indirectly overlap COMMON "
- "blocks %s and %s by EQUIVALENCE at %C",
- sym->common_head->name, common_head->name);
+ if (((sym->value != NULL && sym->value->expr_type != EXPR_NULL)
+ || sym->attr.data) && gfc_current_state () != COMP_BLOCK_DATA)
+ {
+ if (gfc_notify_std (GFC_STD_GNU, "Initialized symbol '%s' at %C "
+ "can only be COMMON in "
+ "BLOCK DATA", sym->name)
+ == FAILURE)
goto cleanup;
- }
- sym->attr.in_common = 1;
- sym->common_head = common_head;
- }
-
- if (gfc_match_eos () == MATCH_YES)
- break;
- if (gfc_match_char (',') != MATCH_YES)
- {
- gfc_error ("Expecting a comma in EQUIVALENCE at %C");
- goto cleanup;
- }
- }
-
- return MATCH_YES;
+ }
-syntax:
- gfc_syntax_error (ST_EQUIVALENCE);
+ if (gfc_add_in_common (&sym->attr, sym->name, NULL) == FAILURE)
+ goto cleanup;
-cleanup:
- eq = tail->next;
- tail->next = NULL;
+ if (tail != NULL)
+ tail->common_next = sym;
+ else
+ *head = sym;
- gfc_free_equiv (gfc_current_ns->equiv);
- gfc_current_ns->equiv = eq;
+ tail = sym;
- return MATCH_ERROR;
-}
+ /* Deal with an optional array specification after the
+ symbol name. */
+ m = gfc_match_array_spec (&as, true, true);
+ if (m == MATCH_ERROR)
+ goto cleanup;
+ if (m == MATCH_YES)
+ {
+ if (as->type != AS_EXPLICIT)
+ {
+ gfc_error ("Array specification for symbol '%s' in COMMON "
+ "at %C must be explicit", sym->name);
+ goto cleanup;
+ }
-/* Check that a statement function is not recursive. This is done by looking
- for the statement function symbol(sym) by looking recursively through its
- expression(e). If a reference to sym is found, true is returned.
- 12.5.4 requires that any variable of function that is implicitly typed
- shall have that type confirmed by any subsequent type declaration. The
- implicit typing is conveniently done here. */
-static bool
-recursive_stmt_fcn (gfc_expr *, gfc_symbol *);
+ if (gfc_add_dimension (&sym->attr, sym->name, NULL) == FAILURE)
+ goto cleanup;
-static bool
-check_stmt_fcn (gfc_expr *e, gfc_symbol *sym, int *f ATTRIBUTE_UNUSED)
-{
+ if (sym->attr.pointer)
+ {
+ gfc_error ("Symbol '%s' in COMMON at %C cannot be a "
+ "POINTER array", sym->name);
+ goto cleanup;
+ }
- if (e == NULL)
- return false;
+ sym->as = as;
+ as = NULL;
- switch (e->expr_type)
- {
- case EXPR_FUNCTION:
- if (e->symtree == NULL)
- return false;
+ }
- /* Check the name before testing for nested recursion! */
- if (sym->name == e->symtree->n.sym->name)
- return true;
+ sym->common_head = t;
- /* Catch recursion via other statement functions. */
- if (e->symtree->n.sym->attr.proc == PROC_ST_FUNCTION
- && e->symtree->n.sym->value
- && recursive_stmt_fcn (e->symtree->n.sym->value, sym))
- return true;
+ /* Check to see if the symbol is already in an equivalence group.
+ If it is, set the other members as being in common. */
+ if (sym->attr.in_equivalence)
+ {
+ for (e1 = gfc_current_ns->equiv; e1; e1 = e1->next)
+ {
+ for (e2 = e1; e2; e2 = e2->eq)
+ if (e2->expr->symtree->n.sym == sym)
+ goto equiv_found;
- if (e->symtree->n.sym->ts.type == BT_UNKNOWN)
- gfc_set_default_type (e->symtree->n.sym, 0, NULL);
+ continue;
- break;
+ equiv_found:
- case EXPR_VARIABLE:
- if (e->symtree && sym->name == e->symtree->n.sym->name)
- return true;
+ for (e2 = e1; e2; e2 = e2->eq)
+ {
+ other = e2->expr->symtree->n.sym;
+ if (other->common_head
+ && other->common_head != sym->common_head)
+ {
+ gfc_error ("Symbol '%s', in COMMON block '%s' at "
+ "%C is being indirectly equivalenced to "
+ "another COMMON block '%s'",
+ sym->name, sym->common_head->name,
+ other->common_head->name);
+ goto cleanup;
+ }
+ other->attr.in_common = 1;
+ other->common_head = t;
+ }
+ }
+ }
- if (e->symtree->n.sym->ts.type == BT_UNKNOWN)
- gfc_set_default_type (e->symtree->n.sym, 0, NULL);
- break;
- default:
- break;
+ gfc_gobble_whitespace ();
+ if (gfc_match_eos () == MATCH_YES)
+ goto done;
+ if (gfc_peek_ascii_char () == '/')
+ break;
+ if (gfc_match_char (',') != MATCH_YES)
+ goto syntax;
+ gfc_gobble_whitespace ();
+ if (gfc_peek_ascii_char () == '/')
+ break;
+ }
}
- return false;
-}
+done:
+ return MATCH_YES;
+syntax:
+ gfc_syntax_error (ST_COMMON);
-static bool
-recursive_stmt_fcn (gfc_expr *e, gfc_symbol *sym)
-{
- return gfc_traverse_expr (e, sym, check_stmt_fcn, 0);
+cleanup:
+ if (old_blank_common)
+ old_blank_common->common_next = NULL;
+ else
+ gfc_current_ns->blank_common.head = NULL;
+ gfc_free_array_spec (as);
+ return MATCH_ERROR;
}
-/* Match a statement function declaration. It is so easy to match
- non-statement function statements with a MATCH_ERROR as opposed to
- MATCH_NO that we suppress error message in most cases. */
+/* Match a BLOCK DATA program unit. */
match
-gfc_match_st_function (void)
+gfc_match_block_data (void)
{
- gfc_error_buf old_error;
+ char name[GFC_MAX_SYMBOL_LEN + 1];
gfc_symbol *sym;
- gfc_expr *expr;
match m;
- m = gfc_match_symbol (&sym, 0);
- if (m != MATCH_YES)
- return m;
-
- gfc_push_error (&old_error);
-
- if (gfc_add_procedure (&sym->attr, PROC_ST_FUNCTION,
- sym->name, NULL) == FAILURE)
- goto undo_error;
-
- if (gfc_match_formal_arglist (sym, 1, 0) != MATCH_YES)
- goto undo_error;
-
- m = gfc_match (" = %e%t", &expr);
- if (m == MATCH_NO)
- goto undo_error;
-
- gfc_free_error (&old_error);
- if (m == MATCH_ERROR)
- return m;
-
- if (recursive_stmt_fcn (expr, sym))
+ if (gfc_match_eos () == MATCH_YES)
{
- gfc_error ("Statement function at %L is recursive", &expr->where);
- return MATCH_ERROR;
+ gfc_new_block = NULL;
+ return MATCH_YES;
}
- sym->value = expr;
-
- if (gfc_notify_std (GFC_STD_F95_OBS, "Obsolescent feature: "
- "Statement function at %C") == FAILURE)
+ m = gfc_match ("% %n%t", name);
+ if (m != MATCH_YES)
return MATCH_ERROR;
- return MATCH_YES;
-
-undo_error:
- gfc_pop_error (&old_error);
- return MATCH_NO;
-}
-
+ if (gfc_get_symbol (name, NULL, &sym))
+ return MATCH_ERROR;
-/***************** SELECT CASE subroutines ******************/
+ if (gfc_add_flavor (&sym->attr, FL_BLOCK_DATA, sym->name, NULL) == FAILURE)
+ return MATCH_ERROR;
-/* Free a single case structure. */
+ gfc_new_block = sym;
-static void
-free_case (gfc_case *p)
-{
- if (p->low == p->high)
- p->high = NULL;
- gfc_free_expr (p->low);
- gfc_free_expr (p->high);
- gfc_free (p);
+ return MATCH_YES;
}
-/* Free a list of case structures. */
+/* Free a namelist structure. */
void
-gfc_free_case_list (gfc_case *p)
+gfc_free_namelist (gfc_namelist *name)
{
- gfc_case *q;
+ gfc_namelist *n;
- for (; p; p = q)
+ for (; name; name = n)
{
- q = p->next;
- free_case (p);
+ n = name->next;
+ free (name);
}
}
-/* Match a single case selector. */
+/* Match a NAMELIST statement. */
-static match
-match_case_selector (gfc_case **cp)
+match
+gfc_match_namelist (void)
{
- gfc_case *c;
- match m;
+ gfc_symbol *group_name, *sym;
+ gfc_namelist *nl;
+ match m, m2;
- c = gfc_get_case ();
- c->where = gfc_current_locus;
+ m = gfc_match (" / %s /", &group_name);
+ if (m == MATCH_NO)
+ goto syntax;
+ if (m == MATCH_ERROR)
+ goto error;
- if (gfc_match_char (':') == MATCH_YES)
- {
- m = gfc_match_init_expr (&c->high);
- if (m == MATCH_NO)
- goto need_expr;
- if (m == MATCH_ERROR)
- goto cleanup;
- }
- else
+ for (;;)
{
- m = gfc_match_init_expr (&c->low);
- if (m == MATCH_ERROR)
- goto cleanup;
- if (m == MATCH_NO)
- goto need_expr;
-
- /* If we're not looking at a ':' now, make a range out of a single
- target. Else get the upper bound for the case range. */
- if (gfc_match_char (':') != MATCH_YES)
- c->high = c->low;
- else
+ if (group_name->ts.type != BT_UNKNOWN)
{
- m = gfc_match_init_expr (&c->high);
- if (m == MATCH_ERROR)
- goto cleanup;
- /* MATCH_NO is fine. It's OK if nothing is there! */
+ gfc_error ("Namelist group name '%s' at %C already has a basic "
+ "type of %s", group_name->name,
+ gfc_typename (&group_name->ts));
+ return MATCH_ERROR;
}
- }
- *cp = c;
- return MATCH_YES;
+ if (group_name->attr.flavor == FL_NAMELIST
+ && group_name->attr.use_assoc
+ && gfc_notify_std (GFC_STD_GNU, "Namelist group name '%s' "
+ "at %C already is USE associated and can"
+ "not be respecified.", group_name->name)
+ == FAILURE)
+ return MATCH_ERROR;
-need_expr:
- gfc_error ("Expected initialization expression in CASE at %C");
+ if (group_name->attr.flavor != FL_NAMELIST
+ && gfc_add_flavor (&group_name->attr, FL_NAMELIST,
+ group_name->name, NULL) == FAILURE)
+ return MATCH_ERROR;
-cleanup:
- free_case (c);
- return MATCH_ERROR;
-}
+ for (;;)
+ {
+ m = gfc_match_symbol (&sym, 1);
+ if (m == MATCH_NO)
+ goto syntax;
+ if (m == MATCH_ERROR)
+ goto error;
+ if (sym->attr.in_namelist == 0
+ && gfc_add_in_namelist (&sym->attr, sym->name, NULL) == FAILURE)
+ goto error;
-/* Match the end of a case statement. */
+ /* Use gfc_error_check here, rather than goto error, so that
+ these are the only errors for the next two lines. */
+ if (sym->as && sym->as->type == AS_ASSUMED_SIZE)
+ {
+ gfc_error ("Assumed size array '%s' in namelist '%s' at "
+ "%C is not allowed", sym->name, group_name->name);
+ gfc_error_check ();
+ }
-static match
-match_case_eos (void)
-{
- char name[GFC_MAX_SYMBOL_LEN + 1];
- match m;
+ nl = gfc_get_namelist ();
+ nl->sym = sym;
+ sym->refs++;
- if (gfc_match_eos () == MATCH_YES)
- return MATCH_YES;
+ if (group_name->namelist == NULL)
+ group_name->namelist = group_name->namelist_tail = nl;
+ else
+ {
+ group_name->namelist_tail->next = nl;
+ group_name->namelist_tail = nl;
+ }
- /* If the case construct doesn't have a case-construct-name, we
- should have matched the EOS. */
- if (!gfc_current_block ())
- return MATCH_NO;
+ if (gfc_match_eos () == MATCH_YES)
+ goto done;
- gfc_gobble_whitespace ();
+ m = gfc_match_char (',');
- m = gfc_match_name (name);
- if (m != MATCH_YES)
- return m;
+ if (gfc_match_char ('/') == MATCH_YES)
+ {
+ m2 = gfc_match (" %s /", &group_name);
+ if (m2 == MATCH_YES)
+ break;
+ if (m2 == MATCH_ERROR)
+ goto error;
+ goto syntax;
+ }
- if (strcmp (name, gfc_current_block ()->name) != 0)
- {
- gfc_error ("Expected block name '%s' of SELECT construct at %C",
- gfc_current_block ()->name);
- return MATCH_ERROR;
+ if (m != MATCH_YES)
+ goto syntax;
+ }
}
- return gfc_match_eos ();
+done:
+ return MATCH_YES;
+
+syntax:
+ gfc_syntax_error (ST_NAMELIST);
+
+error:
+ return MATCH_ERROR;
}
-/* Match a SELECT statement. */
+/* Match a MODULE statement. */
match
-gfc_match_select (void)
+gfc_match_module (void)
{
- gfc_expr *expr;
match m;
- m = gfc_match_label ();
- if (m == MATCH_ERROR)
- return m;
-
- m = gfc_match (" select case ( %e )%t", &expr);
+ m = gfc_match (" %s%t", &gfc_new_block);
if (m != MATCH_YES)
return m;
- new_st.op = EXEC_SELECT;
- new_st.expr1 = expr;
+ if (gfc_add_flavor (&gfc_new_block->attr, FL_MODULE,
+ gfc_new_block->name, NULL) == FAILURE)
+ return MATCH_ERROR;
return MATCH_YES;
}
-/* Push the current selector onto the SELECT TYPE stack. */
+/* Free equivalence sets and lists. Recursively is the easiest way to
+ do this. */
-static void
-select_type_push (gfc_symbol *sel)
+void
+gfc_free_equiv_until (gfc_equiv *eq, gfc_equiv *stop)
{
- gfc_select_type_stack *top = gfc_get_select_type_stack ();
- top->selector = sel;
- top->tmp = NULL;
- top->prev = select_type_stack;
+ if (eq == stop)
+ return;
- select_type_stack = top;
+ gfc_free_equiv (eq->eq);
+ gfc_free_equiv_until (eq->next, stop);
+ gfc_free_expr (eq->expr);
+ free (eq);
}
-/* Set the temporary for the current SELECT TYPE selector. */
+void
+gfc_free_equiv (gfc_equiv *eq)
+{
+ gfc_free_equiv_until (eq, NULL);
+}
-static void
-select_type_set_tmp (gfc_typespec *ts)
+
+/* Match an EQUIVALENCE statement. */
+
+match
+gfc_match_equivalence (void)
{
- 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;
+ gfc_equiv *eq, *set, *tail;
+ gfc_ref *ref;
+ gfc_symbol *sym;
+ match m;
+ gfc_common_head *common_head = NULL;
+ bool common_flag;
+ int cnt;
- 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)
+ tail = NULL;
+
+ for (;;)
{
- 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;
+ eq = gfc_get_equiv ();
+ if (tail == NULL)
+ tail = eq;
- /* 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;
+ eq->next = gfc_current_ns->equiv;
+ gfc_current_ns->equiv = eq;
- select_type_stack->tmp = tmp;
-}
+ if (gfc_match_char ('(') != MATCH_YES)
+ goto syntax;
+
+ set = eq;
+ common_flag = FALSE;
+ cnt = 0;
+
+ for (;;)
+ {
+ m = gfc_match_equiv_variable (&set->expr);
+ if (m == MATCH_ERROR)
+ goto cleanup;
+ if (m == MATCH_NO)
+ goto syntax;
+
+ /* count the number of objects. */
+ cnt++;
+
+ if (gfc_match_char ('%') == MATCH_YES)
+ {
+ gfc_error ("Derived type component %C is not a "
+ "permitted EQUIVALENCE member");
+ goto cleanup;
+ }
+
+ for (ref = set->expr->ref; ref; ref = ref->next)
+ if (ref->type == REF_ARRAY && ref->u.ar.type == AR_SECTION)
+ {
+ gfc_error ("Array reference in EQUIVALENCE at %C cannot "
+ "be an array section");
+ goto cleanup;
+ }
+ sym = set->expr->symtree->n.sym;
-/* Match a SELECT TYPE statement. */
+ if (gfc_add_in_equivalence (&sym->attr, sym->name, NULL) == FAILURE)
+ goto cleanup;
-match
-gfc_match_select_type (void)
-{
- gfc_expr *expr1, *expr2 = NULL;
- match m;
- char name[GFC_MAX_SYMBOL_LEN];
+ if (sym->attr.in_common)
+ {
+ common_flag = TRUE;
+ common_head = sym->common_head;
+ }
- m = gfc_match_label ();
- if (m == MATCH_ERROR)
- return m;
+ if (gfc_match_char (')') == MATCH_YES)
+ break;
- m = gfc_match (" select type ( ");
- if (m != MATCH_YES)
- return m;
+ if (gfc_match_char (',') != MATCH_YES)
+ goto syntax;
- gfc_current_ns = gfc_build_block_ns (gfc_current_ns);
+ set->eq = gfc_get_equiv ();
+ set = set->eq;
+ }
- 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))
+ if (cnt < 2)
{
- m = MATCH_ERROR;
+ gfc_error ("EQUIVALENCE at %C requires two or more objects");
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;
+ /* If one of the members of an equivalence is in common, then
+ mark them all as being in common. Before doing this, check
+ that members of the equivalence group are not in different
+ common blocks. */
+ if (common_flag)
+ for (set = eq; set; set = set->eq)
+ {
+ sym = set->expr->symtree->n.sym;
+ if (sym->common_head && sym->common_head != common_head)
+ {
+ gfc_error ("Attempt to indirectly overlap COMMON "
+ "blocks %s and %s by EQUIVALENCE at %C",
+ sym->common_head->name, common_head->name);
+ goto cleanup;
+ }
+ sym->attr.in_common = 1;
+ sym->common_head = common_head;
+ }
- /* 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;
+ if (gfc_match_eos () == MATCH_YES)
+ break;
+ if (gfc_match_char (',') != MATCH_YES)
+ {
+ gfc_error ("Expecting a comma in EQUIVALENCE at %C");
+ goto cleanup;
+ }
}
- new_st.op = EXEC_SELECT_TYPE;
- new_st.expr1 = expr1;
- new_st.expr2 = expr2;
- new_st.ext.block.ns = gfc_current_ns;
+ return MATCH_YES;
- select_type_push (expr1->symtree->n.sym);
+syntax:
+ gfc_syntax_error (ST_EQUIVALENCE);
- return MATCH_YES;
-
cleanup:
- gfc_current_ns = gfc_current_ns->parent;
- return m;
+ eq = tail->next;
+ tail->next = NULL;
+
+ gfc_free_equiv (gfc_current_ns->equiv);
+ gfc_current_ns->equiv = eq;
+
+ return MATCH_ERROR;
}
-/* Match a CASE statement. */
+/* Check that a statement function is not recursive. This is done by looking
+ for the statement function symbol(sym) by looking recursively through its
+ expression(e). If a reference to sym is found, true is returned.
+ 12.5.4 requires that any variable of function that is implicitly typed
+ shall have that type confirmed by any subsequent type declaration. The
+ implicit typing is conveniently done here. */
+static bool
+recursive_stmt_fcn (gfc_expr *, gfc_symbol *);
-match
-gfc_match_case (void)
+static bool
+check_stmt_fcn (gfc_expr *e, gfc_symbol *sym, int *f ATTRIBUTE_UNUSED)
{
- gfc_case *c, *head, *tail;
- match m;
- head = tail = NULL;
+ if (e == NULL)
+ return false;
- if (gfc_current_state () != COMP_SELECT)
+ switch (e->expr_type)
{
- gfc_error ("Unexpected CASE statement at %C");
- return MATCH_ERROR;
- }
+ case EXPR_FUNCTION:
+ if (e->symtree == NULL)
+ return false;
- if (gfc_match ("% default") == MATCH_YES)
- {
- m = match_case_eos ();
- if (m == MATCH_NO)
- goto syntax;
- if (m == MATCH_ERROR)
- goto cleanup;
+ /* Check the name before testing for nested recursion! */
+ if (sym->name == e->symtree->n.sym->name)
+ return true;
- new_st.op = EXEC_SELECT;
- c = gfc_get_case ();
- c->where = gfc_current_locus;
- new_st.ext.case_list = c;
- return MATCH_YES;
- }
+ /* Catch recursion via other statement functions. */
+ if (e->symtree->n.sym->attr.proc == PROC_ST_FUNCTION
+ && e->symtree->n.sym->value
+ && recursive_stmt_fcn (e->symtree->n.sym->value, sym))
+ return true;
- if (gfc_match_char ('(') != MATCH_YES)
- goto syntax;
+ if (e->symtree->n.sym->ts.type == BT_UNKNOWN)
+ gfc_set_default_type (e->symtree->n.sym, 0, NULL);
- for (;;)
- {
- if (match_case_selector (&c) == MATCH_ERROR)
- goto cleanup;
+ break;
- if (head == NULL)
- head = c;
- else
- tail->next = c;
+ case EXPR_VARIABLE:
+ if (e->symtree && sym->name == e->symtree->n.sym->name)
+ return true;
- tail = c;
+ if (e->symtree->n.sym->ts.type == BT_UNKNOWN)
+ gfc_set_default_type (e->symtree->n.sym, 0, NULL);
+ break;
- if (gfc_match_char (')') == MATCH_YES)
- break;
- if (gfc_match_char (',') != MATCH_YES)
- goto syntax;
+ default:
+ break;
}
- m = match_case_eos ();
- if (m == MATCH_NO)
- goto syntax;
- if (m == MATCH_ERROR)
- goto cleanup;
-
- new_st.op = EXEC_SELECT;
- new_st.ext.case_list = head;
-
- return MATCH_YES;
+ return false;
+}
-syntax:
- 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;
+static bool
+recursive_stmt_fcn (gfc_expr *e, gfc_symbol *sym)
+{
+ return gfc_traverse_expr (e, sym, check_stmt_fcn, 0);
}
-/* Match a TYPE IS statement. */
+/* Match a statement function declaration. It is so easy to match
+ non-statement function statements with a MATCH_ERROR as opposed to
+ MATCH_NO that we suppress error message in most cases. */
match
-gfc_match_type_is (void)
+gfc_match_st_function (void)
{
- gfc_case *c = NULL;
+ gfc_error_buf old_error;
+ gfc_symbol *sym;
+ gfc_expr *expr;
match m;
- if (gfc_current_state () != COMP_SELECT_TYPE)
+ m = gfc_match_symbol (&sym, 0);
+ if (m != MATCH_YES)
+ return m;
+
+ gfc_push_error (&old_error);
+
+ if (gfc_add_procedure (&sym->attr, PROC_ST_FUNCTION,
+ sym->name, NULL) == FAILURE)
+ goto undo_error;
+
+ if (gfc_match_formal_arglist (sym, 1, 0) != MATCH_YES)
+ goto undo_error;
+
+ m = gfc_match (" = %e%t", &expr);
+ if (m == MATCH_NO)
+ goto undo_error;
+
+ gfc_free_error (&old_error);
+ if (m == MATCH_ERROR)
+ return m;
+
+ if (recursive_stmt_fcn (expr, sym))
{
- gfc_error ("Unexpected TYPE IS statement at %C");
+ gfc_error ("Statement function at %L is recursive", &expr->where);
return MATCH_ERROR;
}
- if (gfc_match_char ('(') != MATCH_YES)
- goto syntax;
+ sym->value = expr;
- c = gfc_get_case ();
- c->where = gfc_current_locus;
+ if (gfc_notify_std (GFC_STD_F95_OBS, "Obsolescent feature: "
+ "Statement function at %C") == FAILURE)
+ return MATCH_ERROR;
- /* 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;
+ return MATCH_YES;
+
+undo_error:
+ gfc_pop_error (&old_error);
+ return MATCH_NO;
+}
- if (gfc_match_char (')') != MATCH_YES)
- goto syntax;
- m = match_case_eos ();
- if (m == MATCH_NO)
- goto syntax;
- if (m == MATCH_ERROR)
- goto cleanup;
+/***************** SELECT CASE subroutines ******************/
- new_st.op = EXEC_SELECT_TYPE;
- new_st.ext.case_list = c;
+/* Free a single case structure. */
- /* Create temporary variable. */
- select_type_set_tmp (&c->ts);
+static void
+free_case (gfc_case *p)
+{
+ if (p->low == p->high)
+ p->high = NULL;
+ gfc_free_expr (p->low);
+ gfc_free_expr (p->high);
+ free (p);
+}
- return MATCH_YES;
-syntax:
- gfc_error ("Syntax error in TYPE IS specification at %C");
+/* Free a list of case structures. */
-cleanup:
- if (c != NULL)
- gfc_free_case_list (c); /* new_st is cleaned up in parse.c. */
- return MATCH_ERROR;
+void
+gfc_free_case_list (gfc_case *p)
+{
+ gfc_case *q;
+
+ for (; p; p = q)
+ {
+ q = p->next;
+ free_case (p);
+ }
}
-/* Match a CLASS IS or CLASS DEFAULT statement. */
+/* Match a single case selector. */
-match
-gfc_match_class_is (void)
+static match
+match_case_selector (gfc_case **cp)
{
- gfc_case *c = NULL;
+ gfc_case *c;
match m;
- if (gfc_current_state () != COMP_SELECT_TYPE)
- return MATCH_NO;
+ c = gfc_get_case ();
+ c->where = gfc_current_locus;
- if (gfc_match ("% default") == MATCH_YES)
+ if (gfc_match_char (':') == MATCH_YES)
{
- m = match_case_eos ();
+ m = gfc_match_init_expr (&c->high);
if (m == MATCH_NO)
- goto syntax;
+ goto need_expr;
+ if (m == MATCH_ERROR)
+ goto cleanup;
+ }
+ else
+ {
+ m = gfc_match_init_expr (&c->low);
if (m == MATCH_ERROR)
goto cleanup;
+ if (m == MATCH_NO)
+ goto need_expr;
- 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;
+ /* If we're not looking at a ':' now, make a range out of a single
+ target. Else get the upper bound for the case range. */
+ if (gfc_match_char (':') != MATCH_YES)
+ c->high = c->low;
+ else
+ {
+ m = gfc_match_init_expr (&c->high);
+ if (m == MATCH_ERROR)
+ goto cleanup;
+ /* MATCH_NO is fine. It's OK if nothing is there! */
+ }
}
- m = gfc_match ("% is");
- if (m == MATCH_NO)
- goto syntax;
- if (m == MATCH_ERROR)
- goto cleanup;
+ *cp = c;
+ return MATCH_YES;
- if (gfc_match_char ('(') != MATCH_YES)
- goto syntax;
+need_expr:
+ gfc_error ("Expected initialization expression in CASE at %C");
- c = gfc_get_case ();
- c->where = gfc_current_locus;
+cleanup:
+ free_case (c);
+ return MATCH_ERROR;
+}
- if (match_derived_type_spec (&c->ts) == MATCH_ERROR)
- goto cleanup;
- if (c->ts.type == BT_DERIVED)
- c->ts.type = BT_CLASS;
+/* Match the end of a case statement. */
- if (gfc_match_char (')') != MATCH_YES)
- goto syntax;
+static match
+match_case_eos (void)
+{
+ char name[GFC_MAX_SYMBOL_LEN + 1];
+ match m;
- m = match_case_eos ();
- if (m == MATCH_NO)
- goto syntax;
- if (m == MATCH_ERROR)
- goto cleanup;
+ if (gfc_match_eos () == MATCH_YES)
+ return MATCH_YES;
- new_st.op = EXEC_SELECT_TYPE;
- new_st.ext.case_list = c;
-
- /* Create temporary variable. */
- select_type_set_tmp (&c->ts);
+ /* If the case construct doesn't have a case-construct-name, we
+ should have matched the EOS. */
+ if (!gfc_current_block ())
+ return MATCH_NO;
- return MATCH_YES;
+ gfc_gobble_whitespace ();
-syntax:
- gfc_error ("Syntax error in CLASS IS specification at %C");
+ m = gfc_match_name (name);
+ if (m != MATCH_YES)
+ return m;
-cleanup:
- if (c != NULL)
- gfc_free_case_list (c); /* new_st is cleaned up in parse.c. */
- return MATCH_ERROR;
-}
+ if (strcmp (name, gfc_current_block ()->name) != 0)
+ {
+ gfc_error ("Expected block name '%s' of SELECT construct at %C",
+ gfc_current_block ()->name);
+ return MATCH_ERROR;
+ }
+ return gfc_match_eos ();
+}
-/********************* WHERE subroutines ********************/
-/* Match the rest of a simple WHERE statement that follows an IF statement.
- */
+/* Match a SELECT statement. */
-static match
-match_simple_where (void)
+match
+gfc_match_select (void)
{
gfc_expr *expr;
- gfc_code *c;
match m;
- m = gfc_match (" ( %e )", &expr);
+ m = gfc_match_label ();
+ if (m == MATCH_ERROR)
+ return m;
+
+ m = gfc_match (" select case ( %e )%t", &expr);
if (m != MATCH_YES)
return m;
- m = gfc_match_assignment ();
- if (m == MATCH_NO)
- goto syntax;
- if (m == MATCH_ERROR)
- goto cleanup;
+ new_st.op = EXEC_SELECT;
+ new_st.expr1 = expr;
- if (gfc_match_eos () != MATCH_YES)
- goto syntax;
+ return MATCH_YES;
+}
- c = gfc_get_code ();
- c->op = EXEC_WHERE;
- c->expr1 = expr;
- c->next = gfc_get_code ();
+/* Push the current selector onto the SELECT TYPE stack. */
- *c->next = new_st;
- gfc_clear_new_st ();
+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;
- new_st.op = EXEC_WHERE;
- new_st.block = c;
+ select_type_stack = top;
+}
- return MATCH_YES;
-syntax:
- gfc_syntax_error (ST_WHERE);
+/* Set the temporary for the current SELECT TYPE selector. */
-cleanup:
- gfc_free_expr (expr);
- return MATCH_ERROR;
+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);
+ if (select_type_stack->selector->ts.type == BT_CLASS &&
+ CLASS_DATA (select_type_stack->selector)->attr.allocatable)
+ gfc_add_allocatable (&tmp->n.sym->attr, NULL);
+ else
+ 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.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 WHERE statement. */
+/* Match a SELECT TYPE statement. */
match
-gfc_match_where (gfc_statement *st)
+gfc_match_select_type (void)
{
- gfc_expr *expr;
- match m0, m;
- gfc_code *c;
+ gfc_expr *expr1, *expr2 = NULL;
+ match m;
+ char name[GFC_MAX_SYMBOL_LEN];
- m0 = gfc_match_label ();
- if (m0 == MATCH_ERROR)
- return m0;
+ m = gfc_match_label ();
+ if (m == MATCH_ERROR)
+ return m;
- m = gfc_match (" where ( %e )", &expr);
+ m = gfc_match (" select type ( ");
if (m != MATCH_YES)
return m;
- if (gfc_match_eos () == MATCH_YES)
+ 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
{
- *st = ST_WHERE_BLOCK;
- new_st.op = EXEC_WHERE;
- new_st.expr1 = expr;
- return MATCH_YES;
+ m = gfc_match (" %e ", &expr1);
+ if (m != MATCH_YES)
+ goto cleanup;
}
- m = gfc_match_assignment ();
- if (m == MATCH_NO)
- gfc_syntax_error (ST_WHERE);
-
+ 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_free_expr (expr);
- return MATCH_ERROR;
+ gfc_error ("Selector in SELECT TYPE at %C is not a named variable; "
+ "use associate-name=>");
+ m = MATCH_ERROR;
+ goto cleanup;
}
- /* We've got a simple WHERE statement. */
- *st = ST_WHERE;
- c = gfc_get_code ();
-
- c->op = EXEC_WHERE;
- c->expr1 = expr;
- c->next = gfc_get_code ();
-
- *c->next = new_st;
- gfc_clear_new_st ();
+ new_st.op = EXEC_SELECT_TYPE;
+ new_st.expr1 = expr1;
+ new_st.expr2 = expr2;
+ new_st.ext.block.ns = gfc_current_ns;
- new_st.op = EXEC_WHERE;
- new_st.block = c;
+ select_type_push (expr1->symtree->n.sym);
return MATCH_YES;
+
+cleanup:
+ gfc_current_ns = gfc_current_ns->parent;
+ return m;
}
-/* Match an ELSEWHERE statement. We leave behind a WHERE node in
- new_st if successful. */
+/* Match a CASE statement. */
match
-gfc_match_elsewhere (void)
+gfc_match_case (void)
{
- char name[GFC_MAX_SYMBOL_LEN + 1];
- gfc_expr *expr;
+ gfc_case *c, *head, *tail;
match m;
- if (gfc_current_state () != COMP_WHERE)
+ head = tail = NULL;
+
+ if (gfc_current_state () != COMP_SELECT)
{
- gfc_error ("ELSEWHERE statement at %C not enclosed in WHERE block");
+ gfc_error ("Unexpected CASE statement at %C");
return MATCH_ERROR;
}
- expr = NULL;
-
- if (gfc_match_char ('(') == MATCH_YES)
+ if (gfc_match ("% default") == MATCH_YES)
{
- m = gfc_match_expr (&expr);
+ m = match_case_eos ();
if (m == MATCH_NO)
goto syntax;
if (m == MATCH_ERROR)
- return MATCH_ERROR;
+ goto cleanup;
- if (gfc_match_char (')') != MATCH_YES)
- goto syntax;
+ new_st.op = EXEC_SELECT;
+ c = gfc_get_case ();
+ c->where = gfc_current_locus;
+ new_st.ext.block.case_list = c;
+ return MATCH_YES;
}
- if (gfc_match_eos () != MATCH_YES)
+ if (gfc_match_char ('(') != MATCH_YES)
+ goto syntax;
+
+ for (;;)
{
- /* Only makes sense if we have a where-construct-name. */
- if (!gfc_current_block ())
- {
- m = MATCH_ERROR;
- goto cleanup;
- }
- /* Better be a name at this point. */
- m = gfc_match_name (name);
- if (m == MATCH_NO)
- goto syntax;
- if (m == MATCH_ERROR)
+ if (match_case_selector (&c) == MATCH_ERROR)
goto cleanup;
- if (gfc_match_eos () != MATCH_YES)
- goto syntax;
+ if (head == NULL)
+ head = c;
+ else
+ tail->next = c;
- if (strcmp (name, gfc_current_block ()->name) != 0)
- {
- gfc_error ("Label '%s' at %C doesn't match WHERE label '%s'",
- name, gfc_current_block ()->name);
- goto cleanup;
- }
+ tail = c;
+
+ if (gfc_match_char (')') == MATCH_YES)
+ break;
+ if (gfc_match_char (',') != MATCH_YES)
+ goto syntax;
}
- new_st.op = EXEC_WHERE;
- new_st.expr1 = expr;
+ m = match_case_eos ();
+ if (m == MATCH_NO)
+ goto syntax;
+ if (m == MATCH_ERROR)
+ goto cleanup;
+
+ new_st.op = EXEC_SELECT;
+ new_st.ext.block.case_list = head;
+
return MATCH_YES;
syntax:
- gfc_syntax_error (ST_ELSEWHERE);
+ gfc_error ("Syntax error in CASE specification at %C");
cleanup:
- gfc_free_expr (expr);
+ gfc_free_case_list (head); /* new_st is cleaned up in parse.c. */
return MATCH_ERROR;
}
-/******************** FORALL subroutines ********************/
-
-/* Free a list of FORALL iterators. */
+/* Match a TYPE IS statement. */
-void
-gfc_free_forall_iterator (gfc_forall_iterator *iter)
+match
+gfc_match_type_is (void)
{
- gfc_forall_iterator *next;
+ gfc_case *c = NULL;
+ match m;
- while (iter)
+ if (gfc_current_state () != COMP_SELECT_TYPE)
{
- next = iter->next;
- gfc_free_expr (iter->var);
- gfc_free_expr (iter->start);
- gfc_free_expr (iter->end);
- gfc_free_expr (iter->stride);
- gfc_free (iter);
- iter = next;
+ gfc_error ("Unexpected TYPE IS statement at %C");
+ return MATCH_ERROR;
}
-}
-
-
-/* Match an iterator as part of a FORALL statement. The format is:
- <var> = <start>:<end>[:<stride>]
-
- On MATCH_NO, the caller tests for the possibility that there is a
- scalar mask expression. */
-
-static match
-match_forall_iterator (gfc_forall_iterator **result)
-{
- gfc_forall_iterator *iter;
- locus where;
- match m;
-
- where = gfc_current_locus;
- iter = XCNEW (gfc_forall_iterator);
-
- m = gfc_match_expr (&iter->var);
- if (m != MATCH_YES)
- goto cleanup;
+ if (gfc_match_char ('(') != MATCH_YES)
+ goto syntax;
- if (gfc_match_char ('=') != MATCH_YES
- || iter->var->expr_type != EXPR_VARIABLE)
- {
- m = MATCH_NO;
- goto cleanup;
- }
+ c = gfc_get_case ();
+ c->where = gfc_current_locus;
- m = gfc_match_expr (&iter->start);
- if (m != MATCH_YES)
+ /* 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)
+ if (gfc_match_char (')') != MATCH_YES)
goto syntax;
- m = gfc_match_expr (&iter->end);
+ m = match_case_eos ();
if (m == MATCH_NO)
goto syntax;
if (m == MATCH_ERROR)
goto cleanup;
- if (gfc_match_char (':') == MATCH_NO)
- iter->stride = gfc_get_int_expr (gfc_default_integer_kind, NULL, 1);
- else
- {
- m = gfc_match_expr (&iter->stride);
- if (m == MATCH_NO)
- goto syntax;
- if (m == MATCH_ERROR)
- goto cleanup;
- }
+ new_st.op = EXEC_SELECT_TYPE;
+ new_st.ext.block.case_list = c;
- /* Mark the iteration variable's symbol as used as a FORALL index. */
- iter->var->symtree->n.sym->forall_index = true;
+ /* Create temporary variable. */
+ select_type_set_tmp (&c->ts);
- *result = iter;
return MATCH_YES;
syntax:
- gfc_error ("Syntax error in FORALL iterator at %C");
- m = MATCH_ERROR;
+ gfc_error ("Syntax error in TYPE IS specification at %C");
cleanup:
-
- gfc_current_locus = where;
- gfc_free_forall_iterator (iter);
- return m;
+ if (c != NULL)
+ gfc_free_case_list (c); /* new_st is cleaned up in parse.c. */
+ return MATCH_ERROR;
}
-/* Match the header of a FORALL statement. */
-
-static match
-match_forall_header (gfc_forall_iterator **phead, gfc_expr **mask)
-{
- gfc_forall_iterator *head, *tail, *new_iter;
- gfc_expr *msk;
- match m;
-
- gfc_gobble_whitespace ();
-
- head = tail = NULL;
- msk = NULL;
-
- if (gfc_match_char ('(') != MATCH_YES)
- return MATCH_NO;
-
- m = match_forall_iterator (&new_iter);
- if (m == MATCH_ERROR)
- goto cleanup;
- if (m == MATCH_NO)
- goto syntax;
-
- head = tail = new_iter;
-
- for (;;)
- {
- if (gfc_match_char (',') != MATCH_YES)
- break;
-
- m = match_forall_iterator (&new_iter);
- if (m == MATCH_ERROR)
- goto cleanup;
+/* Match a CLASS IS or CLASS DEFAULT statement. */
- if (m == MATCH_YES)
- {
- tail->next = new_iter;
- tail = new_iter;
- continue;
- }
+match
+gfc_match_class_is (void)
+{
+ gfc_case *c = NULL;
+ match m;
- /* Have to have a mask expression. */
+ if (gfc_current_state () != COMP_SELECT_TYPE)
+ return MATCH_NO;
- m = gfc_match_expr (&msk);
+ if (gfc_match ("% default") == MATCH_YES)
+ {
+ m = match_case_eos ();
if (m == MATCH_NO)
goto syntax;
if (m == MATCH_ERROR)
goto cleanup;
- break;
+ new_st.op = EXEC_SELECT_TYPE;
+ c = gfc_get_case ();
+ c->where = gfc_current_locus;
+ c->ts.type = BT_UNKNOWN;
+ new_st.ext.block.case_list = c;
+ select_type_set_tmp (NULL);
+ return MATCH_YES;
}
- if (gfc_match_char (')') == MATCH_NO)
+ 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.block.case_list = c;
+
+ /* Create temporary variable. */
+ select_type_set_tmp (&c->ts);
- *phead = head;
- *mask = msk;
return MATCH_YES;
syntax:
- gfc_syntax_error (ST_FORALL);
+ gfc_error ("Syntax error in CLASS IS specification at %C");
cleanup:
- gfc_free_expr (msk);
- gfc_free_forall_iterator (head);
-
+ if (c != NULL)
+ gfc_free_case_list (c); /* new_st is cleaned up in parse.c. */
return MATCH_ERROR;
}
-/* Match the rest of a simple FORALL statement that follows an
- IF statement. */
+
+/********************* WHERE subroutines ********************/
+
+/* Match the rest of a simple WHERE statement that follows an IF statement.
+ */
static match
-match_simple_forall (void)
+match_simple_where (void)
{
- gfc_forall_iterator *head;
- gfc_expr *mask;
+ gfc_expr *expr;
gfc_code *c;
match m;
- mask = NULL;
- head = NULL;
- c = NULL;
-
- m = match_forall_header (&head, &mask);
-
- if (m == MATCH_NO)
- goto syntax;
+ m = gfc_match (" ( %e )", &expr);
if (m != MATCH_YES)
- goto cleanup;
+ return m;
m = gfc_match_assignment ();
-
+ if (m == MATCH_NO)
+ goto syntax;
if (m == MATCH_ERROR)
goto cleanup;
- if (m == MATCH_NO)
- {
- m = gfc_match_pointer_assignment ();
- if (m == MATCH_ERROR)
- goto cleanup;
- if (m == MATCH_NO)
- goto syntax;
- }
-
- c = gfc_get_code ();
- *c = new_st;
- c->loc = gfc_current_locus;
if (gfc_match_eos () != MATCH_YES)
goto syntax;
+ c = gfc_get_code ();
+
+ c->op = EXEC_WHERE;
+ c->expr1 = expr;
+ c->next = gfc_get_code ();
+
+ *c->next = new_st;
gfc_clear_new_st ();
- new_st.op = EXEC_FORALL;
- new_st.expr1 = mask;
- new_st.ext.forall_iterator = head;
- new_st.block = gfc_get_code ();
- new_st.block->op = EXEC_FORALL;
- new_st.block->next = c;
+ new_st.op = EXEC_WHERE;
+ new_st.block = c;
return MATCH_YES;
syntax:
- gfc_syntax_error (ST_FORALL);
+ gfc_syntax_error (ST_WHERE);
cleanup:
- gfc_free_forall_iterator (head);
- gfc_free_expr (mask);
-
+ gfc_free_expr (expr);
return MATCH_ERROR;
}
-/* Match a FORALL statement. */
+/* Match a WHERE statement. */
match
-gfc_match_forall (gfc_statement *st)
+gfc_match_where (gfc_statement *st)
{
- gfc_forall_iterator *head;
- gfc_expr *mask;
- gfc_code *c;
+ gfc_expr *expr;
match m0, m;
-
- head = NULL;
- mask = NULL;
- c = NULL;
+ gfc_code *c;
m0 = gfc_match_label ();
if (m0 == MATCH_ERROR)
- return MATCH_ERROR;
+ return m0;
- m = gfc_match (" forall");
+ m = gfc_match (" where ( %e )", &expr);
if (m != MATCH_YES)
return m;
- m = match_forall_header (&head, &mask);
- if (m == MATCH_ERROR)
- goto cleanup;
- if (m == MATCH_NO)
- goto syntax;
-
if (gfc_match_eos () == MATCH_YES)
{
- *st = ST_FORALL_BLOCK;
- new_st.op = EXEC_FORALL;
- new_st.expr1 = mask;
- new_st.ext.forall_iterator = head;
+ *st = ST_WHERE_BLOCK;
+ new_st.op = EXEC_WHERE;
+ new_st.expr1 = expr;
return MATCH_YES;
}
m = gfc_match_assignment ();
- if (m == MATCH_ERROR)
- goto cleanup;
if (m == MATCH_NO)
+ gfc_syntax_error (ST_WHERE);
+
+ if (m != MATCH_YES)
{
- m = gfc_match_pointer_assignment ();
- if (m == MATCH_ERROR)
- goto cleanup;
- if (m == MATCH_NO)
- goto syntax;
+ gfc_free_expr (expr);
+ return MATCH_ERROR;
}
+ /* We've got a simple WHERE statement. */
+ *st = ST_WHERE;
c = gfc_get_code ();
- *c = new_st;
- c->loc = gfc_current_locus;
+ c->op = EXEC_WHERE;
+ c->expr1 = expr;
+ c->next = gfc_get_code ();
+
+ *c->next = new_st;
gfc_clear_new_st ();
- new_st.op = EXEC_FORALL;
- new_st.expr1 = mask;
- new_st.ext.forall_iterator = head;
- new_st.block = gfc_get_code ();
- new_st.block->op = EXEC_FORALL;
- new_st.block->next = c;
- *st = ST_FORALL;
+ new_st.op = EXEC_WHERE;
+ new_st.block = c;
+
+ return MATCH_YES;
+}
+
+
+/* Match an ELSEWHERE statement. We leave behind a WHERE node in
+ new_st if successful. */
+
+match
+gfc_match_elsewhere (void)
+{
+ char name[GFC_MAX_SYMBOL_LEN + 1];
+ gfc_expr *expr;
+ match m;
+
+ if (gfc_current_state () != COMP_WHERE)
+ {
+ gfc_error ("ELSEWHERE statement at %C not enclosed in WHERE block");
+ return MATCH_ERROR;
+ }
+
+ expr = NULL;
+
+ if (gfc_match_char ('(') == MATCH_YES)
+ {
+ m = gfc_match_expr (&expr);
+ if (m == MATCH_NO)
+ goto syntax;
+ if (m == MATCH_ERROR)
+ return MATCH_ERROR;
+
+ if (gfc_match_char (')') != MATCH_YES)
+ goto syntax;
+ }
+
+ if (gfc_match_eos () != MATCH_YES)
+ {
+ /* Only makes sense if we have a where-construct-name. */
+ if (!gfc_current_block ())
+ {
+ m = MATCH_ERROR;
+ goto cleanup;
+ }
+ /* Better be a name at this point. */
+ m = gfc_match_name (name);
+ if (m == MATCH_NO)
+ goto syntax;
+ if (m == MATCH_ERROR)
+ goto cleanup;
+
+ if (gfc_match_eos () != MATCH_YES)
+ goto syntax;
+
+ if (strcmp (name, gfc_current_block ()->name) != 0)
+ {
+ gfc_error ("Label '%s' at %C doesn't match WHERE label '%s'",
+ name, gfc_current_block ()->name);
+ goto cleanup;
+ }
+ }
+
+ new_st.op = EXEC_WHERE;
+ new_st.expr1 = expr;
return MATCH_YES;
syntax:
- gfc_syntax_error (ST_FORALL);
+ gfc_syntax_error (ST_ELSEWHERE);
cleanup:
- gfc_free_forall_iterator (head);
- gfc_free_expr (mask);
- gfc_free_statements (c);
- return MATCH_NO;
+ gfc_free_expr (expr);
+ return MATCH_ERROR;
}
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