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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  

!

  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)) call abort ()

    deallocate (a)

    nullify(a)

    if(associated(a,a)) call abort()

    allocate (a(2,1,2))

    b => a

    if (.not.associated (b)) call abort ()

    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)) call abort ()

    deallocate (a)

    allocate (a(2,1,2))

    b => a

    if (.not.associated (b, a)) call abort ()

    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)) call abort ()

!

    if ((.not.associated (b, a))  .and. (n .ne. 0)) call abort ()

    deallocate (a)

  end subroutine test3

end