1! Program to test the cshift intrinsic
2program intrinsic_cshift
3   integer, dimension(3, 3) :: a
4   integer, dimension(3, 3, 2) :: b
5
6   ! Scalar shift
7   a = reshape ((/1, 2, 3, 4, 5, 6, 7, 8, 9/), (/3, 3/))
8   a = cshift (a, 1, 1)
9   if (any (a .ne. reshape ((/2, 3, 1, 5, 6, 4, 8, 9, 7/), (/3, 3/)))) &
10      call abort
11
12   a = reshape ((/1, 2, 3, 4, 5, 6, 7, 8, 9/), (/3, 3/))
13   a = cshift (a, -2, dim = 2)
14   if (any (a .ne. reshape ((/4, 5, 6, 7, 8, 9, 1, 2, 3/), (/3, 3/)))) &
15      call abort
16
17   ! Array shift
18   a = reshape ((/1, 2, 3, 4, 5, 6, 7, 8, 9/), (/3, 3/))
19   a = cshift (a, (/1, 0, -1/))
20   if (any (a .ne. reshape ((/2, 3, 1, 4, 5, 6, 9, 7, 8/), (/3, 3/)))) &
21      call abort
22
23   a = reshape ((/1, 2, 3, 4, 5, 6, 7, 8, 9/), (/3, 3/))
24   a = cshift (a, (/2, -2, 0/), dim = 2)
25   if (any (a .ne. reshape ((/7, 5, 3, 1, 8, 6, 4, 2, 9/), (/3, 3/)))) &
26      call abort
27
28   ! Test arrays > rank 2
29   b = reshape ((/1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16, 17,&
30         18, 19/), (/3, 3, 2/))
31   b = cshift (b, 1)
32   if (any (b .ne. reshape ((/2, 3, 1, 5, 6, 4, 8, 9, 7, 12, 13, 11, 15,&
33     16, 14, 18, 19, 17/), (/3, 3, 2/)))) &
34      call abort
35
36   b = reshape ((/1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16, 17,&
37         18, 19/), (/3, 3, 2/))
38   b = cshift (b, reshape ((/1, 2, 3, 4, 5, 6, 7, 8, 9/), (/3, 3/)), 3)
39   if (any (b .ne. reshape ((/11, 2, 13, 4, 15, 6, 17, 8, 19, 1, 12, 3,&
40     14, 5, 16, 7, 18, 9/), (/3, 3, 2/)))) &
41      call abort
42
43end program
44