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/*
* Copyright 2008-2018 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>
#if defined(_CCCL_IMPLICIT_SYSTEM_HEADER_GCC)
# pragma GCC system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_CLANG)
# pragma clang system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_MSVC)
# pragma system_header
#endif // no system header
#include <thrust/detail/cpp11_required.h>
#if THRUST_CPP_DIALECT >= 2011
#include <thrust/detail/type_deduction.h>
#include <thrust/type_traits/remove_cvref.h>
#include <thrust/system/detail/generic/select_system.h>
THRUST_NAMESPACE_BEGIN
namespace detail
{
// We need a way to compute the return type of `select_system`, which is found
// by using `thrust::system::detail::generic::select_system` and then making an
// ADL call. We have no trait that defines the return type. With the
// limitations of C++11 return type deduction, we need to be able to stick all
// of that into `decltype`. So, we put the using statement into a detail
// namespace, and then implement the generic dispatch function in that
// namespace.
namespace select_system_detail
{
using thrust::system::detail::generic::select_system;
struct select_system_fn final
{
__thrust_exec_check_disable__
template <typename DerivedPolicy0>
__host__ __device__
auto operator()(
thrust::detail::execution_policy_base<DerivedPolicy0> const& exec0
) const
THRUST_DECLTYPE_RETURNS(
select_system(
thrust::detail::derived_cast(thrust::detail::strip_const(exec0))
)
)
__thrust_exec_check_disable__
template <typename DerivedPolicy0, typename DerivedPolicy1>
__host__ __device__
auto operator()(
thrust::detail::execution_policy_base<DerivedPolicy0> const& exec0
, thrust::detail::execution_policy_base<DerivedPolicy1> const& exec1
) const
THRUST_DECLTYPE_RETURNS(
select_system(
thrust::detail::derived_cast(thrust::detail::strip_const(exec0))
, thrust::detail::derived_cast(thrust::detail::strip_const(exec1))
)
)
};
} // namespace select_system_detail
THRUST_INLINE_CONSTANT select_system_detail::select_system_fn select_system{};
} // detail
THRUST_NAMESPACE_END
#endif // THRUST_CPP_DIALECT >= 2011
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