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! { dg-do run }
! Test the fix for PRs29396, 29606, 30625 and 30871, in which pointers
! to arrays with subreferences did not work.
!
type :: t
real :: r
integer :: i
character(3) :: chr
end type t
type :: t2
real :: r(2, 2)
integer :: i
character(3) :: chr
end type t2
type :: s
type(t), pointer :: t(:)
end type s
integer, parameter :: sh(2) = (/2,2/)
real, parameter :: a1(2,2) = reshape ((/1.0,2.0,3.0,4.0/),sh)
real, parameter :: a2(2,2) = reshape ((/5.0,6.0,7.0,8.0/),sh)
type(t), target :: tar1(2) = (/t(1.0, 2, "abc"), t(3.0, 4, "efg")/)
character(4), target :: tar2(2) = (/"abcd","efgh"/)
type(s), target :: tar3
character(2), target :: tar4(2) = (/"ab","cd"/)
type(t2), target :: tar5(2) = (/t2(a1, 2, "abc"), t2(a2, 4, "efg")/)
integer, pointer :: ptr(:)
character(2), pointer :: ptr2(:)
real, pointer :: ptr3(:)
!_______________component subreference___________
ptr => tar1%i
ptr = ptr + 1 ! check the scalarizer is OK
if (any (ptr .ne. (/3, 5/))) call abort ()
if (any ((/ptr(1), ptr(2)/) .ne. (/3, 5/))) call abort ()
if (any (tar1%i .ne. (/3, 5/))) call abort ()
! Make sure that the other components are not touched.
if (any (tar1%r .ne. (/1.0, 3.0/))) call abort ()
if (any (tar1%chr .ne. (/"abc", "efg"/))) call abort ()
! Check that the pointer is passed correctly as an actual argument.
call foo (ptr)
if (any (tar1%i .ne. (/2, 4/))) call abort ()
! And that dummy pointers are OK too.
call bar (ptr)
if (any (tar1%i .ne. (/101, 103/))) call abort ()
!_______________substring subreference___________
ptr2 => tar2(:)(2:3)
ptr2 = ptr2(:)(2:2)//"z" ! again, check the scalarizer
if (any (ptr2 .ne. (/"cz", "gz"/))) call abort ()
if (any ((/ptr2(1), ptr2(2)/) .ne. (/"cz", "gz"/))) call abort ()
if (any (tar2 .ne. (/"aczd", "egzh"/))) call abort ()
!_______________substring component subreference___________
ptr2 => tar1(:)%chr(1:2)
ptr2 = ptr2(:)(2:2)//"q" ! yet again, check the scalarizer
if (any (ptr2 .ne. (/"bq","fq"/))) call abort ()
if (any (tar1%chr .ne. (/"bqc","fqg"/))) call abort ()
!_______________trailing array element subreference___________
ptr3 => tar5%r(1,2)
ptr3 = (/99.0, 999.0/)
if (any (tar5(1)%r .ne. reshape ((/1.0,2.0,99.0,4.0/), sh))) call abort ()
if (any (tar5(2)%r .ne. reshape ((/5.0,6.0,999.0,8.0/), sh))) call abort ()
!_______________forall assignment___________
ptr2 => tar2(:)(1:2)
forall (i = 1:2) ptr2(i)(1:1) = "z"
if (any (tar2 .ne. (/"zczd", "zgzh"/))) call abort ()
!_______________something more complicated___________
tar3%t => tar1
ptr3 => tar3%t%r
ptr3 = cos (ptr3)
if (any (abs(ptr3 - (/cos(1.0_4), cos(3.0_4)/)) >= epsilon(1.0_4))) call abort ()
ptr2 => tar3%t(:)%chr(2:3)
ptr2 = " x"
if (any (tar1%chr .ne. (/"b x", "f x"/))) call abort ()
!_______________check non-subref works still___________
ptr2 => tar4
if (any (ptr2 .ne. (/"ab","cd"/))) call abort ()
contains
subroutine foo (arg)
integer :: arg(:)
arg = arg - 1
end subroutine
subroutine bar (arg)
integer, pointer :: arg(:)
arg = arg + 99
end subroutine
end
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