/*
 *  Copyright 2008-2013 NVIDIA Corporation
 *  Modifications Copyright© 2023-2025 Advanced Micro Devices, Inc. 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.
 */

/*! \file type_traits.h
 *  \brief Temporarily define some type traits
 *         until nvcc can compile tr1::type_traits.
 */

#pragma once

#include <thrust/detail/config.h>

#include <thrust/detail/type_traits.h>

#if THRUST_DEVICE_SYSTEM == THRUST_DEVICE_SYSTEM_CUDA
#  include <cuda/std/type_traits>
#elif defined(__has_include)
#  if __has_include(<cuda/std/type_traits>)
#    include <cuda/std/type_traits>
#  endif // __has_include(<cuda/std/type_traits>)
#endif // THRUST_DEVICE_SYSTEM

THRUST_NAMESPACE_BEGIN

namespace detail
{

#if THRUST_DEVICE_SYSTEM == THRUST_DEVICE_SYSTEM_CUDA
template <typename T>
struct has_trivial_assign
    : public integral_constant<bool,
                               (is_pod<T>::value && !is_const<T>::value)
                                 || ::cuda::std::is_trivially_copy_assignable<T>::value>
{};
#else // THRUST_DEVICE_SYSTEM != THRUST_DEVICE_SYSTEM_CUDA
template <typename T>
struct has_trivial_assign
    : public integral_constant<bool,
                               (is_pod<T>::value && !is_const<T>::value)
#  if THRUST_HOST_COMPILER == THRUST_HOST_COMPILER_MSVC
                                 || __is_trivially_assignable(T, const T)
#  elif THRUST_HOST_COMPILER == THRUST_HOST_COMPILER_GCC
// only use the intrinsic for >= 4.3
#    if (__GNUC__ >= 4) && (__GNUC_MINOR__ >= 3)
                                 || __is_trivially_assignable(T, const T)
#    endif // GCC VERSION
#  elif THRUST_HOST_COMPILER == THRUST_HOST_COMPILER_CLANG
                                 || __is_trivially_assignable(T, const T)
#  endif // THRUST_HOST_COMPILER
                               >
{};
#endif // THRUST_DEVICE_SYSTEM == THRUST_DEVICE_SYSTEM_CUDA

} // namespace detail

THRUST_NAMESPACE_END
