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module class_47_mod
type, abstract :: AbsType
contains
procedure(method2), deferred :: method2
end type AbsType
abstract interface
function method2(self,arr) result(a)
import
class(AbsType), intent(in) :: self
integer, intent(in) :: arr(:)
integer :: a(size(arr))
end function method2
end interface
type, extends(AbsType) :: MyType
contains
procedure :: method2 => my_method2
end type MyType
type :: SomeType
integer, allocatable :: arr(:)
class(MyType), allocatable :: obj
contains
procedure :: method1
end type SomeType
contains
subroutine method1(self)
class(SomeType), intent(inout) :: self
allocate(MyType :: self%obj)
self%arr = self%obj%method2(self%arr)
end subroutine method1
function my_method2(self, arr) result(a)
class(MyType), intent(in) :: self
integer, intent(in) :: arr(:)
integer :: a(size(arr))
integer :: i
do i = 1, size(arr)
a(i) = arr(i) * 2
end do
end function my_method2
end module class_47_mod
program class_47
use class_47_mod
implicit none
class(SomeType), allocatable :: s
allocate(s)
allocate(s%arr(3))
s%arr = [1, 2, 3]
call s%method1()
print *, "s%arr: ", s%arr
if (.not. all(s%arr == [2, 4, 6])) error stop
end program class_47
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