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! Program to test IO of derived types

program derived_io

  character(400) :: buf1, buf2, buf3

  type xyz_type

     integer :: x

     character(11) :: y

     logical :: z

  end type xyz_type

  type abcdef_type

     integer :: a

     logical :: b

     type (xyz_type) :: c

     integer :: d

     real(4) :: e

     character(11) :: f

  end type abcdef_type

  type (xyz_type), dimension(2) :: xyz

  type (abcdef_type) abcdef

  xyz(1)%x = 11111

  xyz(1)%y = "hello world"

  xyz(1)%z = .true.

  xyz(2)%x = 0

  xyz(2)%y = "go away"

  xyz(2)%z = .false.

  abcdef%a = 0

  abcdef%b = .true.

  abcdef%c%x = 111

  abcdef%c%y = "bzz booo"

  abcdef%c%z = .false.

  abcdef%d = 3

  abcdef%e = 4.0

  abcdef%f = "kawabanga"

  write (buf1, *), xyz(1)%x, xyz(1)%y, xyz(1)%z

  ! Use function call to ensure it is only evaluated once

  write (buf2, *), xyz(bar())

  if (buf1.ne.buf2) call abort

  write (buf1, *), abcdef

  write (buf2, *), abcdef%a, abcdef%b, abcdef%c, abcdef%d, abcdef%e, abcdef%f

  write (buf3, *), abcdef%a, abcdef%b, abcdef%c%x, abcdef%c%y, &

                   abcdef%c%z, abcdef%d, abcdef%e, abcdef%f

  if (buf1.ne.buf2) call abort

  if (buf1.ne.buf3) call abort

  call foo(xyz(1))

  contains

    subroutine foo(t)

      type (xyz_type) t

      write (buf1, *), t%x, t%y, t%z

      write (buf2, *), t

      if (buf1.ne.buf2) call abort

    end subroutine foo

    integer function bar()

      integer, save :: i = 1

      bar = i

      i = i + 1

    end function

end