mirror of
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78 lines
2.6 KiB
C++
78 lines
2.6 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 TRINITY_ADVSTD_H
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#define TRINITY_ADVSTD_H
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#include <cstddef>
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#include <tuple>
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#include <type_traits>
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#include <utility>
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// this namespace holds implementations of upcoming stdlib features that our c++ version doesn't have yet
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namespace advstd {
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// C++17 std::apply (constrained to only function pointers, not all callable)
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template <typename... Ts>
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using apply_tuple_type = std::tuple<std::remove_cv_t<std::remove_reference_t<Ts>>...>;
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template <typename R, typename... Ts, std::size_t... I>
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R apply_impl(R(*func)(Ts...), apply_tuple_type<Ts...>&& args, std::index_sequence<I...>)
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{
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return func(std::get<I>(std::forward<apply_tuple_type<Ts...>>(args))...);
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}
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template <typename R, typename... Ts>
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R apply(R(*func)(Ts...), apply_tuple_type<Ts...>&& args)
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{
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return apply_impl(func, std::forward<apply_tuple_type<Ts...>>(args), std::index_sequence_for<Ts...>{});
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}
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#define forward_1v(stdname, type) template <typename T> constexpr type stdname ## _v = std::stdname<T>::value
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#define forward_2v(stdname, type) template <typename U, typename V> constexpr type stdname ## _v = std::stdname<U,V>::value
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// C++17 std::is_same_v
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forward_2v(is_same, bool);
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// C++17 std::is_integral_v
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forward_1v(is_integral, bool);
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// C++17 std::is_assignable_v
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forward_2v(is_assignable, bool);
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// C++17 std::is_signed_v
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forward_1v(is_signed, bool);
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// C++17 std::is_unsigned_v
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forward_1v(is_unsigned, bool);
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// C++17 std::is_base_of_v
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forward_2v(is_base_of, bool);
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// C++17 std::is_floating_point_v
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forward_1v(is_floating_point, bool);
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// C++17 std::tuple_size_v
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forward_1v(tuple_size, size_t);
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#undef forward_1v
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#undef forward_2v
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// C++20 std::remove_cvref_t
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template <class T>
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using remove_cvref_t = std::remove_cv_t<std::remove_reference_t<T>>;
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}
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#endif
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