Subversion Repositories openrisc_2011-10-31

! { dg-do run }

! Test the fix for PR26891, in which an optional argument, whose actual

! is a missing dummy argument would cause a segfault.

!

! Contributed by Paul Thomas  

!

  logical :: back =.false.

! This was the case that would fail - PR case was an intrinsic call.

  if (scan ("A quick brown fox jumps over the lazy dog", "lazy", back) &

      .ne. myscan ("A quick brown fox jumps over the lazy dog", "lazy")) &

    call abort ()

! Check that the patch works with non-intrinsic functions.

  if (myscan ("A quick brown fox jumps over the lazy dog", "fox", back) &

      .ne. thyscan ("A quick brown fox jumps over the lazy dog", "fox")) &

    call abort ()

! Check that missing, optional character actual arguments are OK.

  if (scan ("A quick brown fox jumps over the lazy dog", "over", back) &

      .ne. thyscan ("A quick brown fox jumps over the lazy dog")) &

    call abort ()

contains

  integer function myscan (str, substr, back)

    character(*), intent(in) :: str, substr

    logical, optional, intent(in) :: back

    myscan = scan (str, substr, back)

  end function myscan

  integer function thyscan (str, substr, back)

    character(*), intent(in) :: str

    character(*), optional, intent(in) :: substr

    logical, optional, intent(in) :: back

    thyscan = isscan (str, substr, back)

  end function thyscan

  integer function isscan (str, substr, back)

    character(*), intent(in) :: str

    character(*), optional :: substr

    logical, optional, intent(in) :: back

    if (.not.present(substr)) then

      isscan = myscan (str, "over", back)

    else

      isscan = myscan (str, substr, back)

    end if

  end function isscan

end