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tuple_cat.h
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tuple_cat.h
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/*
* 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.
*/
/*! \file tuple_cat.h
* \brief Routines for concatenating tuples
*/
#pragma once
#include <thrust/detail/config.h>
#include <thrust/tuple.h>
#include <thrust/pair.h>
#include <thrust/detail/type_traits.h>
#include <thrust/detail/static_assert.h>
namespace thrust {
namespace detail {
template<int i, typename TT>
struct flattened_tuple_element {
typedef typename flattened_tuple_element<i,
thrust::detail::cons<typename TT::head_type,
typename TT::tail_type> >::type type;
};
template<int i, typename HT, typename TT>
struct flattened_tuple_element<i, thrust::detail::cons<HT, TT> > {
static const int HTL = thrust::tuple_size<HT>::value;
static const bool in_HT = i < HTL;
typedef typename eval_if<in_HT,
thrust::tuple_element<i, HT>,
flattened_tuple_element<i-HTL, TT> >::type type;
};
template<int i>
struct flattened_tuple_element<i, thrust::null_type> {
typedef thrust::null_type type;
};
} //end namespace thrust::detail
template<
typename T0=thrust::tuple<>,
typename T1=thrust::tuple<>,
typename T2=thrust::tuple<>,
typename T3=thrust::tuple<>,
typename T4=thrust::tuple<>,
typename T5=thrust::tuple<>,
typename T6=thrust::tuple<>,
typename T7=thrust::tuple<>,
typename T8=thrust::tuple<>,
typename T9=thrust::tuple<> >
struct tuple_cat_result {
// ========================================================================
// X Note to the user: If you've found this line due to a compiler error, X
// X it's because the concatenated tuple type is too long. X
// X Thrust tuples can have 10 elements, maximum. X
// ========================================================================
THRUST_STATIC_ASSERT(thrust::tuple_size<T0>::value +
thrust::tuple_size<T1>::value +
thrust::tuple_size<T2>::value +
thrust::tuple_size<T3>::value +
thrust::tuple_size<T4>::value +
thrust::tuple_size<T5>::value +
thrust::tuple_size<T6>::value +
thrust::tuple_size<T7>::value +
thrust::tuple_size<T8>::value +
thrust::tuple_size<T9>::value <= 10);
typedef thrust::tuple<
T0, T1, T2, T3, T4,
T5, T6, T7, T8, T9> nested_type;
typedef thrust::tuple<
typename detail::flattened_tuple_element<0, nested_type>::type,
typename detail::flattened_tuple_element<1, nested_type>::type,
typename detail::flattened_tuple_element<2, nested_type>::type,
typename detail::flattened_tuple_element<3, nested_type>::type,
typename detail::flattened_tuple_element<4, nested_type>::type,
typename detail::flattened_tuple_element<5, nested_type>::type,
typename detail::flattened_tuple_element<6, nested_type>::type,
typename detail::flattened_tuple_element<7, nested_type>::type,
typename detail::flattened_tuple_element<8, nested_type>::type,
typename detail::flattened_tuple_element<9, nested_type>::type> type;
};
namespace detail {
template<int i, typename TT>
struct flattened_tuple_get {
__host__ __device__
static typename flattened_tuple_element<i, TT>::type fun(const TT& tt) {
typedef thrust::detail::cons<typename TT::head_type, typename TT::tail_type> cons_type;
return flattened_tuple_get<i, cons_type>::fun(
cons_type(
tt.get_head(),
tt.get_tail()));
}
};
template<typename CT, typename RT, int i, int HTL, bool in_HT>
__host__ __device__
typename enable_if<in_HT, RT>::type flattened_tuple_extract(const CT& cs) {
return thrust::get<i>(cs.get_head());
}
template<typename CT, typename RT, int i, int HTL, bool in_HT>
__host__ __device__
typename disable_if<in_HT, RT>::type flattened_tuple_extract(const CT& cs) {
return flattened_tuple_get<i-HTL, typename CT::tail_type>::fun(cs.get_tail());
}
template<int i, typename HT, typename TT>
struct flattened_tuple_get<i, thrust::detail::cons<HT, TT> > {
typedef thrust::detail::cons<HT, TT> cons_type;
static const int HTL = thrust::tuple_size<HT>::value;
static const bool in_HT = i < HTL;
typedef typename flattened_tuple_element<i, cons_type>::type el_type;
__host__ __device__
static el_type fun(const cons_type& cs) {
return flattened_tuple_extract<cons_type, el_type, i, HTL, in_HT>(cs);
}
};
template<int i>
struct flattened_tuple_get<i, thrust::null_type> {
__host__ __device__
static thrust::null_type fun(const thrust::null_type& n) {
return thrust::null_type();
}
};
template<
typename T0=thrust::null_type,
typename T1=thrust::null_type,
typename T2=thrust::null_type,
typename T3=thrust::null_type,
typename T4=thrust::null_type,
typename T5=thrust::null_type,
typename T6=thrust::null_type,
typename T7=thrust::null_type,
typename T8=thrust::null_type,
typename T9=thrust::null_type >
struct tuple_cat_impl {
typedef thrust::tuple<
T0, T1, T2, T3, T4,
T5, T6, T7, T8, T9> input_type;
typedef typename tuple_cat_result<
T0, T1, T2, T3, T4,
T5, T6, T7, T8, T9>::type result_type;
__host__ __device__
static result_type fun(const input_type& in) {
return result_type(
detail::flattened_tuple_get<0, input_type>::fun(in),
detail::flattened_tuple_get<1, input_type>::fun(in),
detail::flattened_tuple_get<2, input_type>::fun(in),
detail::flattened_tuple_get<3, input_type>::fun(in),
detail::flattened_tuple_get<4, input_type>::fun(in),
detail::flattened_tuple_get<5, input_type>::fun(in),
detail::flattened_tuple_get<6, input_type>::fun(in),
detail::flattened_tuple_get<7, input_type>::fun(in),
detail::flattened_tuple_get<8, input_type>::fun(in),
detail::flattened_tuple_get<9, input_type>::fun(in));
}
};
} //end namespace thrust::detail
__host__ __device__
thrust::tuple<> tuple_cat() {
return thrust::tuple<>();
}
template<typename T0>
__host__ __device__
T0 tuple_cat(const T0& t0) {
return t0;
}
template<typename T0, typename T1>
__host__ __device__
typename tuple_cat_result<T0, T1>::type tuple_cat(const T0& t0,
const T1& t1) {
return detail::tuple_cat_impl<T0, T1>::fun(
thrust::tuple<T0, T1>(
t0, t1));
}
template<typename T0, typename T1, typename T2>
__host__ __device__
typename tuple_cat_result<T0, T1, T2>::type tuple_cat(const T0& t0,
const T1& t1,
const T2& t2) {
return detail::tuple_cat_impl<T0, T1, T2>::fun(
thrust::tuple<T0, T1, T2>(
t0, t1, t2));
}
template<typename T0, typename T1, typename T2, typename T3>
__host__ __device__
typename tuple_cat_result<T0, T1, T2, T3>::type tuple_cat(const T0& t0,
const T1& t1,
const T2& t2,
const T3& t3) {
return detail::tuple_cat_impl<T0, T1, T2, T3>::fun(
thrust::tuple<T0, T1, T2, T3>(
t0, t1, t2, t3));
}
template<typename T0, typename T1, typename T2, typename T3, typename T4>
__host__ __device__
typename tuple_cat_result<T0, T1, T2, T3, T4>::type tuple_cat(const T0& t0,
const T1& t1,
const T2& t2,
const T3& t3,
const T4& t4) {
return detail::tuple_cat_impl<T0, T1, T2, T3, T4>::fun(
thrust::tuple<T0, T1, T2, T3, T4>(
t0, t1, t2, t3, t4));
}
template<typename T0, typename T1, typename T2, typename T3, typename T4,
typename T5>
__host__ __device__
typename tuple_cat_result<
T0, T1, T2, T3, T4,
T5>::type tuple_cat(const T0& t0,
const T1& t1,
const T2& t2,
const T3& t3,
const T4& t4,
const T5& t5) {
return detail::tuple_cat_impl<T0, T1, T2, T3, T4, T5>::fun(
thrust::tuple<T0, T1, T2, T3, T4, T5>(
t0, t1, t2, t3, t4, t5));
}
template<typename T0, typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6>
__host__ __device__
typename tuple_cat_result<
T0, T1, T2, T3, T4,
T5, T6>::type tuple_cat(const T0& t0,
const T1& t1,
const T2& t2,
const T3& t3,
const T4& t4,
const T5& t5,
const T6& t6) {
return detail::tuple_cat_impl<T0, T1, T2, T3, T4, T5, T6>::fun(
thrust::tuple<T0, T1, T2, T3, T4, T5, T6>(
t0, t1, t2, t3, t4, t5, t6));
}
template<typename T0, typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6, typename T7>
__host__ __device__
typename tuple_cat_result<
T0, T1, T2, T3, T4,
T5, T6, T7>::type tuple_cat(const T0& t0,
const T1& t1,
const T2& t2,
const T3& t3,
const T4& t4,
const T5& t5,
const T6& t6,
const T7& t7) {
return detail::tuple_cat_impl<T0, T1, T2, T3, T4, T5, T6, T7>::fun(
thrust::tuple<T0, T1, T2, T3, T4, T5, T6, T7>(
t0, t1, t2, t3, t4, t5, t6, t7));
}
template<typename T0, typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6, typename T7, typename T8>
__host__ __device__
typename tuple_cat_result<
T0, T1, T2, T3, T4,
T5, T6, T7, T8>::type tuple_cat(const T0& t0,
const T1& t1,
const T2& t2,
const T3& t3,
const T4& t4,
const T5& t5,
const T6& t6,
const T7& t7,
const T8& t8) {
return detail::tuple_cat_impl<T0, T1, T2, T3, T4, T5, T6, T7, T8>::fun(
thrust::tuple<T0, T1, T2, T3, T4, T5, T6, T7, T8>(
t0, t1, t2, t3, t4, t5, t6, t7, t8));
}
template<typename T0, typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6, typename T7, typename T8, typename T9>
__host__ __device__
typename tuple_cat_result<
T0, T1, T2, T3, T4,
T5, T6, T7, T8, T9>::type tuple_cat(const T0& t0,
const T1& t1,
const T2& t2,
const T3& t3,
const T4& t4,
const T5& t5,
const T6& t6,
const T7& t7,
const T8& t8,
const T9& t9) {
return detail::tuple_cat_impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::fun(
thrust::tuple<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>(
t0, t1, t2, t3, t4, t5, t6, t7, t8, t9));
}
//Overloads for concatenating empty tuples.
__host__ __device__
thrust::tuple<> tuple_cat(
const thrust::tuple<>& t0,
const thrust::tuple<>& t1) {
return thrust::tuple<>();
}
__host__ __device__
thrust::tuple<> tuple_cat(
const thrust::tuple<>& t0,
const thrust::tuple<>& t1,
const thrust::tuple<>& t2) {
return thrust::tuple<>();
}
__host__ __device__
thrust::tuple<> tuple_cat(
const thrust::tuple<>& t0,
const thrust::tuple<>& t1,
const thrust::tuple<>& t2,
const thrust::tuple<>& t3) {
return thrust::tuple<>();
}
__host__ __device__
thrust::tuple<> tuple_cat(
const thrust::tuple<>& t0,
const thrust::tuple<>& t1,
const thrust::tuple<>& t2,
const thrust::tuple<>& t3,
const thrust::tuple<>& t4) {
return thrust::tuple<>();
}
__host__ __device__
thrust::tuple<> tuple_cat(
const thrust::tuple<>& t0,
const thrust::tuple<>& t1,
const thrust::tuple<>& t2,
const thrust::tuple<>& t3,
const thrust::tuple<>& t4,
const thrust::tuple<>& t5) {
return thrust::tuple<>();
}
__host__ __device__
thrust::tuple<> tuple_cat(
const thrust::tuple<>& t0,
const thrust::tuple<>& t1,
const thrust::tuple<>& t2,
const thrust::tuple<>& t3,
const thrust::tuple<>& t4,
const thrust::tuple<>& t5,
const thrust::tuple<>& t6) {
return thrust::tuple<>();
}
__host__ __device__
thrust::tuple<> tuple_cat(
const thrust::tuple<>& t0,
const thrust::tuple<>& t1,
const thrust::tuple<>& t2,
const thrust::tuple<>& t3,
const thrust::tuple<>& t4,
const thrust::tuple<>& t5,
const thrust::tuple<>& t6,
const thrust::tuple<>& t7) {
return thrust::tuple<>();
}
__host__ __device__
thrust::tuple<> tuple_cat(
const thrust::tuple<>& t0,
const thrust::tuple<>& t1,
const thrust::tuple<>& t2,
const thrust::tuple<>& t3,
const thrust::tuple<>& t4,
const thrust::tuple<>& t5,
const thrust::tuple<>& t6,
const thrust::tuple<>& t7,
const thrust::tuple<>& t8) {
return thrust::tuple<>();
}
__host__ __device__
thrust::tuple<> tuple_cat(
const thrust::tuple<>& t0,
const thrust::tuple<>& t1,
const thrust::tuple<>& t2,
const thrust::tuple<>& t3,
const thrust::tuple<>& t4,
const thrust::tuple<>& t5,
const thrust::tuple<>& t6,
const thrust::tuple<>& t7,
const thrust::tuple<>& t8,
const thrust::tuple<>& t9) {
return thrust::tuple<>();
}
} //end namespace thrust