Reported by Damian Rouson:
module field_module
implicit none
private
public :: field
type ,abstract :: field
end type
end module
module periodic_5th_order_module
use field_module ,only : field
implicit none
type ,extends(field) :: periodic_5th_order
end type
end module
module field_factory_module
implicit none
private
public :: field_factory
type, abstract :: field_factory
contains
procedure(create_interface), deferred :: create
end type
abstract interface
function create_interface(this)
use field_module ,only : field
import :: field_factory
class(field_factory), intent(in) :: this
class(field) ,pointer :: create_interface
end function
end interface
end module
module periodic_5th_factory_module
use field_factory_module , only : field_factory
implicit none
private
public :: periodic_5th_factory
type, extends(field_factory) :: periodic_5th_factory
contains
procedure :: create=>new_periodic_5th_order
end type
contains
function new_periodic_5th_order(this)
use field_module ,only : field
use periodic_5th_order_module ,only : periodic_5th_order
class(periodic_5th_factory), intent(in) :: this
class(field) ,pointer :: new_periodic_5th_order
end function
end module
program main
use field_module ,only : field
use field_factory_module ,only : field_factory
use periodic_5th_factory_module ,only : periodic_5th_factory
implicit none
class(field) ,pointer :: u ! Burgers solution variable
class(field_factory), allocatable :: field_creator
allocate (periodic_5th_factory :: field_creator)
u => field_creator%create()
end program
This gives
undefined reference to `create_interface_'
when linking. 'create_interface' is the abstract interface of the deferred TBP.
Instead of calling this, one should do the same as for other TBPs.
--
Summary: [OOP] deferred TBPs do not work
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Keywords: wrong-code, rejects-valid
Severity: normal
Priority: P3
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: janus at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42144
