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/*
* Copyright 2008-2021 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
* \brief C++17's
* <a href="https://en.cppreference.com/w/cpp/types/conjunction"><tt>std::conjunction</tt></a>,
* <a href="https://en.cppreference.com/w/cpp/types/disjunction"><tt>std::disjunction</tt></a>,
* and <a href="https://en.cppreference.com/w/cpp/types/negation"><tt>std::negation</tt></a>
* metafunctions and related extensions.
*/
#pragma once
#include <thrust/detail/config.h>
#include <thrust/detail/cpp11_required.h>
#if THRUST_CPP_DIALECT >= 2011
#include <type_traits>
THRUST_NAMESPACE_BEGIN
/*! \addtogroup utility
* \{
*/
/*! \addtogroup type_traits Type Traits
* \{
*/
/*! \brief <a href="https://en.cppreference.com/w/cpp/types/integral_constant"><tt>std::integral_constant</tt></a>
* whose value is <tt>(... && Ts::value)</tt>.
*
* \see conjunction_v
* \see conjunction_value
* \see <a href="https://en.cppreference.com/w/cpp/types/conjunction"><tt>std::conjunction</tt></a>
*/
#if THRUST_CPP_DIALECT >= 2017
template <typename... Ts>
using conjunction = std::conjunction<Ts...>;
#else // Older than C++17.
template <typename... Ts>
struct conjunction;
/*! \cond
*/
template <>
struct conjunction<> : std::true_type {};
template <typename T>
struct conjunction<T> : T {};
template <typename T0, typename T1>
struct conjunction<T0, T1> : std::conditional<T0::value, T1, T0>::type {};
template<typename T0, typename T1, typename T2, typename... TN>
struct conjunction<T0, T1, T2, TN...>
: std::conditional<T0::value, conjunction<T1, T2, TN...>, T0>::type {};
/*! \endcond
*/
#endif
/*! \brief <tt>constexpr bool</tt> whose value is <tt>(... && Ts::value)</tt>.
*
* \see conjunction
* \see conjunction_value
* \see <a href="https://en.cppreference.com/w/cpp/types/conjunction"><tt>std::conjunction</tt></a>
*/
#if THRUST_CPP_DIALECT >= 2014
template <typename... Ts>
constexpr bool conjunction_v = conjunction<Ts...>::value;
#endif
/*! \brief <a href="https://en.cppreference.com/w/cpp/types/integral_constant"><tt>std::integral_constant</tt></a>
* whose value is <tt>(... || Ts::value)</tt>.
*
* \see disjunction_v
* \see disjunction_value
* \see <a href="https://en.cppreference.com/w/cpp/types/disjunction"><tt>std::disjunction</tt></a>
*/
#if THRUST_CPP_DIALECT >= 2017
template <typename... Ts>
using disjunction = std::disjunction<Ts...>;
#else // Older than C++17.
template <typename... Ts>
struct disjunction;
/*! \cond
*/
template <>
struct disjunction<> : std::false_type {};
template <typename T>
struct disjunction<T> : T {};
template <typename T0, typename... TN>
struct disjunction<T0, TN...>
: std::conditional<T0::value != false, T0, disjunction<TN...> >::type {};
/*! \endcond
*/
#endif
/*! \brief <tt>constexpr bool</tt> whose value is <tt>(... || Ts::value)</tt>.
*
* \see disjunction
* \see disjunction_value
* \see <a href="https://en.cppreference.com/w/cpp/types/disjunction"><tt>std::disjunction</tt></a>
*/
#if THRUST_CPP_DIALECT >= 2014
template <typename... Ts>
constexpr bool disjunction_v = disjunction<Ts...>::value;
#endif
/*! \brief <a href="https://en.cppreference.com/w/cpp/types/integral_constant"><tt>std::integral_constant</tt></a>
* whose value is <tt>!Ts::value</tt>.
*
* \see negation_v
* \see negation_value
* \see <a href="https://en.cppreference.com/w/cpp/types/negation"><tt>std::negation</tt></a>
*/
#if THRUST_CPP_DIALECT >= 2017
template <typename T>
using negation = std::negation<T>;
#else // Older than C++17.
template <typename T>
struct negation;
/*! \cond
*/
template <typename T>
struct negation : std::integral_constant<bool, !T::value> {};
/*! \endcond
*/
#endif
/*! \brief <tt>constexpr bool</tt> whose value is <tt>!Ts::value</tt>.
*
* \see negation
* \see negation_value
* \see <a href="https://en.cppreference.com/w/cpp/types/negation"><tt>std::negation</tt></a>
*/
#if THRUST_CPP_DIALECT >= 2014
template <typename T>
constexpr bool negation_v = negation<T>::value;
#endif
///////////////////////////////////////////////////////////////////////////////
/*! \brief <a href="https://en.cppreference.com/w/cpp/types/integral_constant"><tt>std::integral_constant</tt></a>
* whose value is <tt>(... && Bs)</tt>.
*
* \see conjunction_value_v
* \see conjunction
* \see <a href="https://en.cppreference.com/w/cpp/types/conjunction"><tt>std::conjunction</tt></a>
*/
template <bool... Bs>
struct conjunction_value;
#if THRUST_CPP_DIALECT >= 2014
/*! \brief <tt>constexpr bool</tt> whose value is <tt>(... && Bs)</tt>.
*
* \see conjunction_value
* \see conjunction
* \see <a href="https://en.cppreference.com/w/cpp/types/conjunction"><tt>std::conjunction</tt></a>
*/
template <bool... Bs>
constexpr bool conjunction_value_v = conjunction_value<Bs...>::value;
#endif
/*! \cond
*/
template <>
struct conjunction_value<> : std::true_type {};
template <bool B>
struct conjunction_value<B> : std::integral_constant<bool, B> {};
template <bool B, bool... Bs>
struct conjunction_value<B, Bs...>
: std::integral_constant<bool, B && conjunction_value<Bs...>::value> {};
/*! \endcond
*/
///////////////////////////////////////////////////////////////////////////////
/*! \brief <a href="https://en.cppreference.com/w/cpp/types/integral_constant"><tt>std::integral_constant</tt></a>
* whose value is <tt>(... || Bs)</tt>.
*
* \see disjunction_value_v
* \see disjunction
* \see <a href="https://en.cppreference.com/w/cpp/types/disjunction"><tt>std::disjunction</tt></a>
*/
template <bool... Bs>
struct disjunction_value;
#if THRUST_CPP_DIALECT >= 2014
/*! \brief <tt>constexpr bool</tt> whose value is <tt>(... || Bs)</tt>.
*
* \see disjunction_value
* \see disjunction
* \see <a href="https://en.cppreference.com/w/cpp/types/disjunction"><tt>std::disjunction</tt></a>
*/
template <bool... Bs>
constexpr bool disjunction_value_v = disjunction_value<Bs...>::value;
#endif
/*! \cond
*/
template <>
struct disjunction_value<> : std::false_type {};
template <bool B>
struct disjunction_value<B> : std::integral_constant<bool, B> {};
template <bool B, bool... Bs>
struct disjunction_value<B, Bs...>
: std::integral_constant<bool, B || disjunction_value<Bs...>::value> {};
/*! \endcond
*/
///////////////////////////////////////////////////////////////////////////////
/*! \brief <a href="https://en.cppreference.com/w/cpp/types/integral_constant"><tt>std::integral_constant</tt></a>
* whose value is <tt>!Bs</tt>.
*
* \see negation_value_v
* \see negation
* \see <a href="https://en.cppreference.com/w/cpp/types/negation"><tt>std::negation</tt></a>
*/
template <bool B>
struct negation_value;
#if THRUST_CPP_DIALECT >= 2014
/*! \brief <tt>constexpr bool</tt> whose value is <tt>!Ts::value</tt>.
*
* \see negation_value
* \see negation
* \see <a href="https://en.cppreference.com/w/cpp/types/negation"><tt>std::negation</tt></a>
*/
template <bool B>
constexpr bool negation_value_v = negation_value<B>::value;
#endif
/*! \cond
*/
template <bool B>
struct negation_value : std::integral_constant<bool, !B> {};
/*! \endcond
*/
///////////////////////////////////////////////////////////////////////////////
/*! \} // type traits
*/
/*! \} // utility
*/
THRUST_NAMESPACE_END
#endif // THRUST_CPP_DIALECT >= 2011
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