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! { dg-do compile }
!
! PR 41556: [OOP] Errors in applying operator/assignment to an abstract type
!
! Contributed by Damian Rouson <damian@rouson.net>
module abstract_algebra
implicit none
private
public :: rescale
public :: object
type ,abstract :: object
contains
procedure(assign_interface) ,deferred :: assign
procedure(product_interface) ,deferred :: product
generic :: assignment(=) => assign
generic :: operator(*) => product
end type
abstract interface
function product_interface(lhs,rhs) result(product)
import :: object
class(object) ,intent(in) :: lhs
class(object) ,allocatable :: product
real ,intent(in) :: rhs
end function
subroutine assign_interface(lhs,rhs)
import :: object
class(object) ,intent(inout) :: lhs
class(object) ,intent(in) :: rhs
end subroutine
end interface
contains
subroutine rescale(operand,scale)
class(object) :: operand
real ,intent(in) :: scale
operand = operand*scale
operand = operand%product(scale)
end subroutine
end module
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