Fortran: F2018 type(*),dimension(*) with scalars [PR104143]
Assumed-size dummy arguments accept arrays and array elements as actual
arguments. There are also a few exceptions when real scalars are permitted.
Since F2018, this includes scalar arguments to assumed-type dummies; while
type(*) was added in TS29113, this change is only in F2018 itself.
PR fortran/104143
gcc/fortran/ChangeLog:
* interface.cc (compare_parameter): Permit scalar args to
'type(*), dimension(*)'.
gcc/testsuite/ChangeLog:
* gfortran.dg/c-interop/c407b-2.f90: Remove dg-error.
* gfortran.dg/assumed_type_16.f90: New test.
* gfortran.dg/assumed_type_17.f90: New test.
gcc/fortran/interface.cc | 11 ++++++++++-
gcc/testsuite/gfortran.dg/assumed_type_16.f90 | 14 ++++++++++++++
gcc/testsuite/gfortran.dg/assumed_type_17.f90 | 18 ++++++++++++++++++
gcc/testsuite/gfortran.dg/c-interop/c407b-2.f90 | 2 +-
4 files changed, 43 insertions(+), 2 deletions(-)
@@ -2692,7 +2692,8 @@ compare_parameter (gfc_symbol *formal, gfc_expr *actual,
- if the actual argument is (a substring of) an element of a
non-assumed-shape/non-pointer/non-polymorphic array; or
- (F2003) if the actual argument is of type character of default/c_char
- kind. */
+ kind.
+ - (F2018) if the dummy argument is type(*). */
is_pointer = actual->expr_type == EXPR_VARIABLE
? actual->symtree->n.sym->attr.pointer : false;
@@ -2759,6 +2760,14 @@ compare_parameter (gfc_symbol *formal, gfc_expr *actual,
if (ref == NULL && actual->expr_type != EXPR_NULL)
{
+ if (actual->rank == 0
+ && formal->ts.type == BT_ASSUMED
+ && formal->as
+ && formal->as->type == AS_ASSUMED_SIZE)
+ /* This is new in F2018, type(*) is new in TS29113, but gfortran does
+ not differentiate. Thus, if type(*) exists, it is valid;
+ otherwise, type(*) is already rejected. */
+ return true;
if (where
&& (!formal->attr.artificial || (!formal->maybe_array
&& !maybe_dummy_array_arg (actual))))
new file mode 100644
@@ -0,0 +1,14 @@
+! { dg-do compile }
+! { dg-additional-options "-std=f2008" }
+!
+! PR fortran/104143
+!
+ interface
+ subroutine foo(x)
+ type(*) :: x(*) ! { dg-error "Fortran 2018: Assumed type" }
+ end
+ end interface
+ integer :: a
+ call foo(a) ! { dg-error "Type mismatch in argument" }
+ call foo((a)) ! { dg-error "Type mismatch in argument" }
+end
new file mode 100644
@@ -0,0 +1,18 @@
+! { dg-do compile }
+! { dg-additional-options "-std=f2018 -fdump-tree-original" }
+!
+! PR fortran/104143
+!
+ interface
+ subroutine foo(x)
+ type(*) :: x(*)
+ end
+ end interface
+ integer :: a
+ call foo(a)
+ call foo((a))
+end
+
+! { dg-final { scan-tree-dump-times "foo \\(&a\\);" 1 "original" } }
+! { dg-final { scan-tree-dump-times "D.\[0-9\]+ = a;" 1 "original" } }
+! { dg-final { scan-tree-dump-times "foo \\(&D.\[0-9\]+\\);" 1 "original" } }
@@ -40,7 +40,7 @@ subroutine s0 (x)
call g (x, 1)
call f (x, 1) ! { dg-error "Type mismatch" }
- call h (x, 1) ! { dg-error "Rank mismatch" }
+ call h (x, 1) ! Scalar to type(*),dimension(*): Invalid in TS29113 but valid since F2018
end subroutine
! Check that you can't use an assumed-type array variable in an array