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! { dg-do run }

! PR26766 Recursive I/O with internal units

! Test case derived from example in PR

! Submitted by Jerry DeLisle  

program pr26766

  implicit none

  character (len=8) :: str, tmp

  write (str, '(a)')  bar (1234)

  if (str.ne."abcd") call abort()

  str = "wxyz"

  write (str, '(2a4)') foo (1), bar (1)

  if (str.ne."abcdabcd") call abort()

contains

  function foo (i) result (s)

    integer, intent(in) :: i

    character (len=4)   :: s, t

    if (i < 0) then

       s = "1234"

    else

       ! Internal I/O, allowed recursive in f2003, see section 9.11

       write (s, '(a)') "abcd"

    end if

  end function foo

  function bar (i) result (s)

    integer, intent(in) :: i

    character (len=4)   :: s, t

    if (i < 0) then

      s = "4567"

    else

      write (s, '(a)') foo(i)

    end if

  end function bar

end program pr26766