[Bug fortran/53191] New: [OOP] C614 (F2003) or C618 (F2008) not implemented for class expressions

[pault at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53191

             Bug #: 53191
           Summary: [OOP] C614 (F2003) or C618 (F2008) not implemented for
                    class expressions
    Classification: Unclassified
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: pault@gcc.gnu.org


"A part-name to the right of a part-ref with non-zero rank shall not have the
POINTER or ALLOCATABLE attribute" is not implemented for class expressions.

 implicit none
 type t0
   integer :: j = 42
 end type t0
 type, extends(t0) :: t1
   integer :: k = 99
 end type t1
 type t
   integer :: i
   class(t0), allocatable :: foo
 end type t
 type(t) :: m(4)
 integer :: n

 do n = 1, 2
   allocate(m(n)%foo, source = t0(n*99))
 end do
 do n = 3, 4
   allocate(m(n)%foo, source = t1(n*99, n*999))
 end do

end

Should not be permitted, according to this constraint. At present, it compiles
and does the intended thing at runtime.

Cheers

Paul