The following program compiles with ifort and with NAG f95 but fails with
gfortran with:
call qsort(A,tmp)
1
Error: Rank mismatch in argument 'a' at (1) (0 and 1)
( The program was motivated by
http://groups.google.com/group/comp.lang.fortran/msg/cde7f6104f6c29c7 )
module m_qsort
implicit none
type, abstract :: sort_t
contains
procedure(lt_cmp), deferred :: lt_cmp
end type sort_t
interface
logical function lt_cmp(a,b)
import
class(sort_t), intent(in) :: a, b
end function lt_cmp
end interface
contains
subroutine qsort(a,tmp)
class(sort_t), intent(inout) :: a(:),tmp
! Fixme: Replace "tmp" by a local var and "allocate(tmp, source=a)"
end subroutine qsort
end module m_qsort
module test
use m_qsort
implicit none
type, extends(sort_t) :: sort_int_t
integer :: i
contains
procedure :: lt_cmp => lt_cmp_int
end type
contains
logical function lt_cmp_int(a,b) result(cmp)
class(sort_int_t), intent(in) :: a
class(sort_t), intent(in) :: b
select type(b)
type is(sort_int_t)
if (a%i < b%i) then
cmp = .true.
else
cmp = .false.
end if
class default
stop 'Something went wrong'
end select
end function lt_cmp_int
end module test
program main
use test
type(sort_int_t) :: A(5), tmp
A(:)%i = [1 , 4, 5, 2, 3]
print *, A
call qsort(A,tmp)
print *, A
end program main
--
Summary: Calling function which takes CLASS: Rank comparison does
not work
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Keywords: rejects-valid
Severity: normal
Priority: P3
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: burnus at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41539
