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https://github.com/DarkMatterCore/nxdumptool.git
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56 lines
2 KiB
C++
56 lines
2 KiB
C++
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/*
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* is_base_of_template.hpp
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*
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* Copyright (c) 2020-2024, DarkMatterCore <pabloacurielz@gmail.com>.
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*
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* Based on goneskiing's C++ implementation at:
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* https://stackoverflow.com/a/63562826
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*
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* This file is part of nxdumptool (https://github.com/DarkMatterCore/nxdumptool).
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*
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* nxdumptool is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* nxdumptool is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#pragma once
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#ifndef __IS_BASE_OF_TEMPLATE_HPP__
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#define __IS_BASE_OF_TEMPLATE_HPP__
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#include <variant>
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#include <experimental/type_traits>
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namespace nxdt::utils
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{
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/* Can be used as part of static asserts to check if any given class was derived from a base template class. */
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template <template <typename...> class Base, typename Derived>
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struct is_base_of_template
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{
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template <typename... Ts> static constexpr std::variant<Ts...> is_callable(Base<Ts...>*);
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template <typename T> using is_callable_t = decltype(is_callable(std::declval<T*>()));
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static inline constexpr bool value = std::experimental::is_detected_v<is_callable_t, Derived>;
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using type = std::experimental::detected_or_t<void, is_callable_t, Derived>;
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};
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template <template <typename...> class Base, typename Derived>
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using is_base_of_template_t = typename is_base_of_template<Base, Derived>::type;
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template <template <typename...> class Base, typename Derived>
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inline constexpr bool is_base_of_template_v = is_base_of_template<Base, Derived>::value;
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}
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#endif /* __IS_BASE_OF_TEMPLATE_HPP__ */
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