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https://github.com/TrinityCore/TrinityCore.git
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c37984fc6a
* Trinity::new_from_tuple - same as std::make_from_tuple except allocates object using "new"
* Trinity::is_tuple - detects whether given type is a tuple specialization
* advstd::type_identity - C++20 std::type_identity
(cherry picked from commit 7c08fc863a)
66 lines
1.9 KiB
C++
66 lines
1.9 KiB
C++
/*
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* This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef Tuples_h__
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#define Tuples_h__
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#include <tuple>
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namespace Trinity
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{
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template <typename T, typename Tuple>
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struct has_type;
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template <typename T, typename... Us>
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struct has_type<T, std::tuple<Us...>> : std::disjunction<std::is_same<T, Us>...>
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{
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};
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template <typename T, typename... Us>
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constexpr bool has_type_v = has_type<T, Us...>::value;
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template<typename>
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struct is_tuple : std::false_type
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{
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};
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template<typename... Ts>
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struct is_tuple<std::tuple<Ts...>> : std::true_type
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{
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};
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template<typename... Ts>
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constexpr bool is_tuple_v = is_tuple<Ts...>::value;
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namespace Impl
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{
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template <class T, class Tuple, size_t... I>
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T* new_from_tuple(Tuple&& args, std::index_sequence<I...>)
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{
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return new T(std::get<I>(std::forward<Tuple>(args))...);
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}
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}
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template<class T, class Tuple>
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[[nodiscard]] T* new_from_tuple(Tuple&& args)
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{
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return Impl::new_from_tuple<T>(std::forward<Tuple>(args), std::make_index_sequence<std::tuple_size_v<std::remove_reference_t<Tuple>>>{});
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}
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}
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#endif // Tuples_h__
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