! 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.
!       

logical function check_ptr(p1,p2) result (RSLT)
  class(*), pointer :: p1
  class(*), pointer :: p2
  RSLT = same_type_as(p1,p2)
end function check_ptr

logical function check_allocs(a1,a2) result (RSLT)
  class(*), allocatable :: a1
  class(*), pointer :: a2
  RSLT = same_type_as(a1,a2)
end function check_allocs

logical function check_logical(p) result (RSLT)
  class(*),pointer :: p
  select type(p)
  type is (logical)
     RSLT = .true.
     class default
     RSLT = .false.
  end select
end function check_logical

logical function check_alloc(a) result (RSLT)
  class(*),allocatable :: a
  select type(a)
  type is (integer*8)
     RSLT = .true.
     class default
     RSLT = .false.
   end select
end function check_alloc

subroutine assign_alloc(a)
  class(*),allocatable :: a
  select type(a)
  type is (double precision)
     a = 555.0
  end select
end subroutine assign_alloc

subroutine assign_ptr(p)
  class(*),pointer :: p 
  select type(p)
  type is (integer*8)
     p = 777
  end select
end subroutine assign_ptr


program unlimited_poly
USE CHECK_MOD
  
  logical,target :: l 
  logical results(18)
  logical expect(18)
  integer*8,target:: z
  class(*),pointer :: lp
  
  interface
     subroutine assign_alloc(a)
       class(*),allocatable :: a
     end subroutine assign_alloc
     
     subroutine assign_ptr(p)
       class(*),pointer :: p
     end subroutine assign_ptr

     logical function check_ptr(p1,p2) result (RSLT)
       class(*), pointer :: p1
       class(*), pointer :: p2
     end function check_ptr
     
     logical function check_logical(p) result (RSLT)
       class(*),pointer :: p
     end function check_logical
     
     logical function check_alloc(a) result (RSLT)
       class(*),allocatable :: a
     end function check_alloc

     logical function check_allocs(a1,a2) result (RSLT)
     class(*), allocatable :: a1
     class(*), pointer :: a2
     end function check_allocs

  end interface
  
  type my_type
     class(*),allocatable :: a
     class(*),pointer :: p
  end type my_type
  
  type(my_type) :: obj

  results = .false.
  expect = .true.
  
  l = .false.

  allocate(integer*8::obj%a)

  obj%p => l

  select type(p=>obj%p)
  type is (logical)
     results(1) = .true.
     p = .true.
  end select 

  select type(a=>obj%a)
  type is (integer*8)
     results(2) = .true.
     a = 999
!  type is (integer)
!     results(2) = .false.
!     a = 111
  end select

  results(3) = l

  lp => z
  results(8) = same_type_as(obj%a,lp)
  results(9) = extends_type_of(obj%a,lp)

  lp => l
  results(10) = check_ptr(obj%p,lp)
  results(6) = same_type_as(obj%p,lp)
  results(7) = extends_type_of(obj%p,lp)
  results(4) = check_logical(obj%p)
  nullify(obj%p)
  results(13) = check_ptr(lp,obj%p) .eq. .false.
  results(17) = l
  
  select type(lp)
  type is (logical)
  results(18) = lp
  end select

  results(5) = check_alloc(obj%a)
  lp => z
  results(11) = check_allocs(obj%a, lp)
  select type(o=>obj%a)
  type is (integer*8)
     results(14) = o .eq. 999
     class default
     results(14) = .false.
  end select
  deallocate(obj%a)
  results(12) = check_allocs(obj%a, lp) .eq. .false.
  
  allocate(double precision::obj%a)
  call assign_alloc(obj%a)
  select type(o=>obj%a)
  type is (double precision)
     results(15) = o .eq. 555.0
     class default
     results(15) = .false.
  end select
  obj%p => lp
  call assign_ptr(obj%p)
  results(16) = z .eq. 777
 
  call check(results,expect,18)
  
end program unlimited_poly