! Program to test the eoshift intrinsic
program intrinsic_eoshift
   integer, dimension(3, 3) :: a
   integer, dimension(3, 3, 2) :: b

   ! Scalar shift and scalar bound.
   a = reshape ((/1, 2, 3, 4, 5, 6, 7, 8, 9/), (/3, 3/))
   a = eoshift (a, 1, 99, 1)
   if (any (a .ne. reshape ((/2, 3, 99, 5, 6, 99, 8, 9, 99/), (/3, 3/)))) &
      call abort

   a = reshape ((/1, 2, 3, 4, 5, 6, 7, 8, 9/), (/3, 3/))
   a = eoshift (a, -2, dim = 2)
   if (any (a .ne. reshape ((/0, 0, 0, 0, 0, 0, 1, 2, 3/), (/3, 3/)))) &
      call abort

   ! Array shift and scalar bound.
   a = reshape ((/1, 2, 3, 4, 5, 6, 7, 8, 9/), (/3, 3/))
   a = eoshift (a, (/1, 0, -1/), 99, 1)
   if (any (a .ne. reshape ((/2, 3, 99, 4, 5, 6, 99, 7, 8/), (/3, 3/)))) &
      call abort

   a = reshape ((/1, 2, 3, 4, 5, 6, 7, 8, 9/), (/3, 3/))
   a = eoshift (a, (/2, -2, 0/), dim = 2)
   if (any (a .ne. reshape ((/7, 0, 3, 0, 0, 6, 0, 2, 9/), (/3, 3/)))) &
      call abort

   ! Scalar shift and array bound.
   a = reshape ((/1, 2, 3, 4, 5, 6, 7, 8, 9/), (/3, 3/))
   a = eoshift (a, 1, (/99, -1, 42/), 1)
   if (any (a .ne. reshape ((/2, 3, 99, 5, 6, -1, 8, 9, 42/), (/3, 3/)))) &
      call abort

   a = reshape ((/1, 2, 3, 4, 5, 6, 7, 8, 9/), (/3, 3/))
   a = eoshift (a, -2, (/99, -1, 42/), 2)
   if (any (a .ne. reshape ((/99, -1, 42, 99, -1, 42, 1, 2, 3/), (/3, 3/)))) &
      call abort

   ! Array shift and array bound.
   a = reshape ((/1, 2, 3, 4, 5, 6, 7, 8, 9/), (/3, 3/))
   a = eoshift (a, (/1, 0, -1/), (/99, -1, 42/), 1)
   if (any (a .ne. reshape ((/2, 3, 99, 4, 5, 6, 42, 7, 8/), (/3, 3/)))) &
      call abort

   a = reshape ((/1, 2, 3, 4, 5, 6, 7, 8, 9/), (/3, 3/))
   a = eoshift (a, (/2, -2, 0/), (/99, -1, 42/), 2)
   if (any (a .ne. reshape ((/7, -1, 3, 99, -1, 6, 99, 2, 9/), (/3, 3/)))) &
      call abort

   ! Test arrays > rank 2
   b(:, :, 1) = reshape ((/1, 2, 3, 4, 5, 6, 7, 8, 9/), (/3, 3/))
   b(:, :, 2) = 10 + reshape ((/1, 2, 3, 4, 5, 6, 7, 8, 9/), (/3, 3/))
   b = eoshift (b, 1, 99, 1)
   if (any (b(:, :, 1) .ne. reshape ((/2, 3, 99, 5, 6, 99, 8, 9, 99/), (/3, 3/)))) &
      call abort
   if (any (b(:, :, 2) .ne. reshape ((/12, 13, 99, 15, 16, 99, 18, 19, 99/), (/3, 3/)))) &
      call abort

   ! TODO: Test array sections
end program