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