/*
 *  Copyright 2008-2012 NVIDIA Corporation
 *
 *  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.
 */

#pragma once

#include <thrust/detail/config.h>
#include <thrust/tuple.h>
#include <thrust/pair.h>
#include <thrust/detail/reference_forward_declaration.h>

namespace thrust
{
namespace detail
{

  
template<
  typename T0, typename T1, typename T2,
  typename T3, typename T4, typename T5,
  typename T6, typename T7, typename T8,
  typename T9
>
  class tuple_of_iterator_references
    : public thrust::tuple<T0,T1,T2,T3,T4,T5,T6,T7,T8,T9>
{
  private:
    typedef thrust::tuple<T0,T1,T2,T3,T4,T5,T6,T7,T8,T9> super_t;

  public:
    // allow implicit construction from tuple<refs>
    inline __host__ __device__
    tuple_of_iterator_references(const super_t &other)
      : super_t(other)
    {}

    // allow assignment from tuples
    // XXX might be worthwhile to guard this with an enable_if is_assignable
    template<typename U1, typename U2>
    inline __host__ __device__
    tuple_of_iterator_references &operator=(const detail::cons<U1,U2> &other)
    {
      super_t::operator=(other);
      return *this;
    }

    // allow assignment from pairs
    // XXX might be worthwhile to guard this with an enable_if is_assignable
    template<typename U1, typename U2>
    inline __host__ __device__
    tuple_of_iterator_references &operator=(const thrust::pair<U1,U2> &other)
    {
      super_t::operator=(other);
      return *this;
    }

    // allow assignment from reference<tuple>
    // XXX perhaps we should generalize to reference<T>
    //     we could captures reference<pair> this way
    template<typename U0, typename U1, typename U2,
             typename U3, typename U4, typename U5,
             typename U6, typename U7, typename U8,
             typename U9,
             typename Pointer, typename Derived>
    inline __host__ __device__
// XXX gcc-4.2 crashes on is_assignable
//    typename thrust::detail::enable_if<
//      thrust::detail::is_assignable<
//        super_t,
//        const thrust::tuple<U0,U1,U2,U3,U4,U5,U6,U7,U8,U9>
//      >::value,
//      tuple_of_iterator_references &
//    >::type
    tuple_of_iterator_references &
    operator=(const thrust::reference<thrust::tuple<U0,U1,U2,U3,U4,U5,U6,U7,U8,U9>, Pointer, Derived> &other)
    {
      typedef thrust::tuple<U0,U1,U2,U3,U4,U5,U6,U7,U8,U9> tuple_type;

      // XXX perhaps this could be accelerated
      tuple_type other_tuple = other;
      super_t::operator=(other_tuple);
      return *this;
    }


    // duplicate thrust::tuple's constructors
    inline __host__ __device__
    tuple_of_iterator_references() {}

    inline __host__ __device__ 
    tuple_of_iterator_references(typename access_traits<T0>::parameter_type t0)
      : super_t(t0,
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()))
    {}

    inline __host__ __device__ 
    tuple_of_iterator_references(typename access_traits<T0>::parameter_type t0,
                                 typename access_traits<T1>::parameter_type t1)
      : super_t(t0, t1,
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()))
    {}

    inline __host__ __device__ 
    tuple_of_iterator_references(typename access_traits<T0>::parameter_type t0,
                                 typename access_traits<T1>::parameter_type t1,
                                 typename access_traits<T2>::parameter_type t2)
      : super_t(t0, t1, t2,
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()))
    {}

    inline __host__ __device__ 
    tuple_of_iterator_references(typename access_traits<T0>::parameter_type t0,
                                 typename access_traits<T1>::parameter_type t1,
                                 typename access_traits<T2>::parameter_type t2,
                                 typename access_traits<T3>::parameter_type t3)
      : super_t(t0, t1, t2, t3,
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()))
    {}

    inline __host__ __device__ 
    tuple_of_iterator_references(typename access_traits<T0>::parameter_type t0,
                                 typename access_traits<T1>::parameter_type t1,
                                 typename access_traits<T2>::parameter_type t2,
                                 typename access_traits<T3>::parameter_type t3,
                                 typename access_traits<T4>::parameter_type t4)
      : super_t(t0, t1, t2, t3, t4,
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()))
    {}

    inline __host__ __device__ 
    tuple_of_iterator_references(typename access_traits<T0>::parameter_type t0,
                                 typename access_traits<T1>::parameter_type t1,
                                 typename access_traits<T2>::parameter_type t2,
                                 typename access_traits<T3>::parameter_type t3,
                                 typename access_traits<T4>::parameter_type t4,
                                 typename access_traits<T5>::parameter_type t5)
      : super_t(t0, t1, t2, t3, t4, t5,
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()))
    {}

    inline __host__ __device__ 
    tuple_of_iterator_references(typename access_traits<T0>::parameter_type t0,
                                 typename access_traits<T1>::parameter_type t1,
                                 typename access_traits<T2>::parameter_type t2,
                                 typename access_traits<T3>::parameter_type t3,
                                 typename access_traits<T4>::parameter_type t4,
                                 typename access_traits<T5>::parameter_type t5,
                                 typename access_traits<T6>::parameter_type t6)
      : super_t(t0, t1, t2, t3, t4, t5, t6,
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()))
    {}

    inline __host__ __device__ 
    tuple_of_iterator_references(typename access_traits<T0>::parameter_type t0,
                                 typename access_traits<T1>::parameter_type t1,
                                 typename access_traits<T2>::parameter_type t2,
                                 typename access_traits<T3>::parameter_type t3,
                                 typename access_traits<T4>::parameter_type t4,
                                 typename access_traits<T5>::parameter_type t5,
                                 typename access_traits<T6>::parameter_type t6,
                                 typename access_traits<T7>::parameter_type t7)
      : super_t(t0, t1, t2, t3, t4, t5, t6, t7,
                static_cast<const null_type&>(null_type()),
                static_cast<const null_type&>(null_type()))
    {}

    inline __host__ __device__ 
    tuple_of_iterator_references(typename access_traits<T0>::parameter_type t0,
                                 typename access_traits<T1>::parameter_type t1,
                                 typename access_traits<T2>::parameter_type t2,
                                 typename access_traits<T3>::parameter_type t3,
                                 typename access_traits<T4>::parameter_type t4,
                                 typename access_traits<T5>::parameter_type t5,
                                 typename access_traits<T6>::parameter_type t6,
                                 typename access_traits<T7>::parameter_type t7,
                                 typename access_traits<T8>::parameter_type t8)
      : super_t(t0, t1, t2, t3, t4, t5, t6, t7, t8,
                static_cast<const null_type&>(null_type()))
    {}

    inline __host__ __device__ 
    tuple_of_iterator_references(typename access_traits<T0>::parameter_type t0,
                                 typename access_traits<T1>::parameter_type t1,
                                 typename access_traits<T2>::parameter_type t2,
                                 typename access_traits<T3>::parameter_type t3,
                                 typename access_traits<T4>::parameter_type t4,
                                 typename access_traits<T5>::parameter_type t5,
                                 typename access_traits<T6>::parameter_type t6,
                                 typename access_traits<T7>::parameter_type t7,
                                 typename access_traits<T8>::parameter_type t8,
                                 typename access_traits<T9>::parameter_type t9)
      : super_t(t0, t1, t2, t3, t4, t5, t6, t7, t8, t9)
    {}
};


} // end detail
} // end thrust