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! { dg-do run }
! Tests the implementation of 13.14.13 of the f95 standard
! in respect of zero character and zero array length.
!
! Contributed by Paul Thomas <pault@gcc.gnu.org>
!
call test1 ()
call test2 ()
call test3 (0)
call test3 (1)
contains
subroutine test1 ()
integer, pointer, dimension(:, :, :) :: a, b
allocate (a(2,0,2))
b => a
! Even though b is zero length, associated returns true because
! the target argument is not present (case (i))
if (.not. associated (b)) STOP 1
deallocate (a)
nullify(a)
if(associated(a,a)) STOP 2
allocate (a(2,1,2))
b => a
if (.not.associated (b)) STOP 3
deallocate (a)
end subroutine test1
subroutine test2 ()
integer, pointer, dimension(:, :, :) :: a, b
allocate (a(2,0,2))
b => a
! Associated returns false because target is present (case(iii)).
if (associated (b, a)) STOP 4
deallocate (a)
allocate (a(2,1,2))
b => a
if (.not.associated (b, a)) STOP 5
deallocate (a)
end subroutine test2
subroutine test3 (n)
integer :: n
character(len=n), pointer, dimension(:) :: a, b
allocate (a(2))
b => a
! Again, with zero character length associated returns false
! if target is present.
if (associated (b, a) .and. (n .eq. 0)) STOP 6
!
if ((.not.associated (b, a)) .and. (n .ne. 0)) STOP 7
deallocate (a)
end subroutine test3
end
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