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! { dg-do run }

! Tests the fix for pr28174, in which the fix for pr28118 was

! corrupting the character lengths of arrays that shared a

! character length structure.  In addition, in developing the

! fix, it was noted that intent(out/inout) arguments were not

! getting written back to the calling scope.

!

! Based on the testscase by Harald Anlauf  

!

program pr28174

  implicit none

  character(len=12) :: teststring(2) = (/ "abc def ghij", &

                                          "klm nop qrst" /)

  character(len=12) :: a(2), b(2), c(2), d(2)

  integer :: m = 7, n

  a = teststring

  b = a

  c = a

  d = a

  n = m - 4

! Make sure that variable substring references work.

  call foo (a(:)(m:m+5), c(:)(n:m+2), d(:)(5:9))

  if (any (a .ne. teststring)) call abort ()

  if (any (b .ne. teststring)) call abort ()

  if (any (c .ne. (/"ab456789#hij", &

                    "kl7654321rst"/))) call abort ()

  if (any (d .ne. (/"abc 23456hij", &

                    "klm 98765rst"/))) call abort ()

contains

  subroutine foo (w, x, y)

    character(len=*), intent(in) :: w(:)

    character(len=*), intent(inOUT) :: x(:)

    character(len=*), intent(OUT) :: y(:)

    character(len=12) :: foostring(2) = (/"0123456789#$" , &

                                          "$#9876543210"/)

! This next is not required by the standard but tests the

! functioning of the gfortran implementation.

!   if (all (x(:)(3:7) .eq. y)) call abort ()

    x = foostring (:)(5 : 4 + len (x))

    y = foostring (:)(3 : 2 + len (y))

  end subroutine foo

end program pr28174