! Copyright (c) 2010, NVIDIA CORPORATION.  All rights reserved.
!
! Licensed under the Apache License, Version 2.0 (the "License");
! you may not use this file except in compliance with the License.
! You may obtain a copy of the License at
!
!     http://www.apache.org/licenses/LICENSE-2.0
!
! Unless required by applicable law or agreed to in writing, software
! distributed under the License is distributed on an "AS IS" BASIS,
! WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
! See the License for the specific language governing permissions and
! limitations under the License.
!       

module shape_mod

type shape
        integer :: color
        logical :: filled
        integer :: x
        integer :: y
contains
	procedure :: write => write_shape 
	procedure :: draw => draw_shape
end type shape

type, EXTENDS ( shape ) :: rectangle
        integer :: the_length
        integer :: the_width
contains
        procedure,pass(this) :: write => write_rec
	procedure :: draw => draw_rectangle
end type rectangle

type, extends (rectangle) :: square
contains
        procedure :: draw => draw_sq
	procedure :: write => write_sq
	procedure,pass(this) :: write2 => write_sq2
	procedure :: write3 => write_sq3
end type square
interface write3
procedure write_sq3
end interface

contains

  subroutine write_shape(this,results,i)
   class (shape) :: this
   integer results(:)
   integer i
   type(shape) :: sh
   results(i) = same_type_as(sh,this)
   end subroutine write_shape

   subroutine write_rec(this,results,i)
   class (rectangle) :: this
   integer results(:)
   integer i
   type(shape) :: sh
   results(i) = same_type_as(sh,this)
   end subroutine write_rec

   subroutine draw_shape(this,results,i)
   class (shape) :: this
   integer results(:)
   integer i
   print *, 'draw shape!'
   end subroutine draw_shape

   subroutine draw_rectangle(this,results,i)
   class (rectangle) :: this
   integer results(:)
   integer i
   type(rectangle) :: rec
   results(i) = extends_type_of(this,rec)
   end subroutine draw_rectangle

   subroutine write_sq(this,results,i)
   class (square) :: this
   integer results(:)
   integer i
   type(rectangle) :: rec
   results(i) = extends_type_of(this,rec)
   end subroutine write_sq

   subroutine draw_sq(this,results,i)
   class (square) :: this
   integer results(:)
   integer i
   type(rectangle) :: rec
   results(i) = extends_type_of(this,rec)
   end subroutine draw_sq

   subroutine write_sq2(i,this,results)
   class (square) :: this
   integer i 
   integer results(:)
   type(rectangle) :: rec
   results(i) = extends_type_of(this,rec)
   end subroutine write_sq2

   function write_sq3(this) result(rec)
   class (square) :: this
   type(rectangle) :: rec
   if (extends_type_of(this,rec)) then
   rec%the_length = 77
   else
   rec%the_length = 66
   endif
   end function 

end module shape_mod

program p
USE CHECK_MOD
use shape_mod

logical l 
integer results(5)
integer expect(5)
data expect /.true.,.true.,.true.,.true.,.true./
data results /.false.,.false.,.false.,.false.,.false./
class(square),allocatable :: s
class(shape),allocatable :: sh
type(rectangle) :: r
type(square),allocatable :: sq

allocate(s)
call s%write2(1,results)
call s%write(results,2)
call s%draw(results,3)

allocate(sq)
r = sq%write3()
results(5) = r%the_length .eq. 77

allocate(sh)
call write_shape(sh,results,4)

call check(results,expect,5)

end