1! { dg-do compile }
2!
3! PR fortran/97242
4!
5implicit none
6type t
7  integer, allocatable :: A(:,:,:)
8  integer :: D(5,5,5)
9end type t
10
11type(t), target :: B(5)
12integer, pointer, contiguous :: P(:,:,:)
13integer, target :: C(5,5,5)
14integer :: i
15
16i = 1
17
18! OK: contiguous
19P => B(i)%A
20P => B(i)%A(:,:,:)
21P => C
22P => C(:,:,:)
23call foo (B(i)%A)
24call foo (B(i)%A(:,:,:))
25call foo (C)
26call foo (C(:,:,:))
27
28! Invalid - not contiguous
29! "If the pointer object has the CONTIGUOUS attribute, the pointer target shall be contiguous."
30! → known to be noncontigous (not always checkable, however)
31P => B(i)%A(:,::3,::4)   ! <<< Unknown as (1:2:3,1:3:4) is contiguous and has one element.
32P => B(i)%D(:,::2,::2)   ! { dg-error "Assignment to contiguous pointer from non-contiguous target" }
33P => C(::2,::2,::2)      ! { dg-error "Assignment to contiguous pointer from non-contiguous target" }
34
35! This following is stricter:
36! C1541  The actual argument corresponding to a dummy pointer with the
37!        CONTIGUOUS attribute shall be simply contiguous (9.5.4).
38call foo (B(i)%A(:,::3,::4))  ! { dg-error "must be simply contiguous" }
39call foo (C(::2,::2,::2))     ! { dg-error "must be simply contiguous" }
40
41contains
42  subroutine foo(Q)
43    integer, pointer, intent(in), contiguous :: Q(:,:,:)
44  end subroutine foo
45end
46