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module procedures_short_pairs_visitors_factory use classes_periodic_box, only: Abstract_Periodic_Box use classes_short_pairs_visitor, only: Abstract_Short_Pairs_Visitor, Concrete_Short_Pairs_Visitor, & Null_Short_Pairs_Visitor implicit none private public :: create, destroy contains subroutine create(visitors, periodic_boxes, interact) class(Abstract_Short_Pairs_Visitor), allocatable, intent(out) :: visitors(:) class(Abstract_Periodic_Box), intent(in) :: periodic_boxes(:) logical, intent(in) :: interact integer :: i_box if (interact) then allocate(Concrete_Short_Pairs_Visitor :: visitors(size(periodic_boxes))) else allocate(Null_Short_Pairs_Visitor :: visitors(size(periodic_boxes))) end if do i_box = 1, size(visitors) call visitors(i_box)%construct(periodic_boxes(i_box)) end do end subroutine create subroutine destroy(visitors) class(Abstract_Short_Pairs_Visitor), allocatable, intent(inout) :: visitors(:) integer :: i_box if (allocated(visitors)) then do i_box = size(visitors), 1, -1 call visitors(i_box)%destroy() end do deallocate(visitors) end if end subroutine destroy end module procedures_short_pairs_visitors_factory