1! { dg-do run }
2! Tests the implementation of 13.14.13 of the f95 standard
3! in respect of zero character and zero array length.
4!
5! Contributed by Paul Thomas  <pault@gcc.gnu.org>
6!
7  call test1 ()
8  call test2 ()
9  call test3 (0)
10  call test3 (1)
11contains
12  subroutine test1 ()
13    integer, pointer, dimension(:, :, :)  :: a, b
14    allocate (a(2,0,2))
15    b => a
16! Even though b is zero length, associated returns true because
17! the target argument is not present (case (i))
18    if (.not. associated (b)) STOP 1
19    deallocate (a)
20    nullify(a)
21    if(associated(a,a)) STOP 2
22    allocate (a(2,1,2))
23    b => a
24    if (.not.associated (b)) STOP 3
25    deallocate (a)
26  end subroutine test1
27  subroutine test2 ()
28    integer, pointer, dimension(:, :, :)  :: a, b
29    allocate (a(2,0,2))
30    b => a
31! Associated returns false because target is present (case(iii)).
32    if (associated (b, a)) STOP 4
33    deallocate (a)
34    allocate (a(2,1,2))
35    b => a
36    if (.not.associated (b, a)) STOP 5
37    deallocate (a)
38  end subroutine test2
39  subroutine test3 (n)
40    integer :: n
41    character(len=n), pointer, dimension(:)  :: a, b
42    allocate (a(2))
43    b => a
44! Again, with zero character length associated returns false
45! if target is present.
46    if (associated (b, a) .and. (n .eq. 0)) STOP 6
47!
48    if ((.not.associated (b, a))  .and. (n .ne. 0)) STOP 7
49    deallocate (a)
50  end subroutine test3
51end
52