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https://github.com/Atmosphere-NX/Atmosphere.git
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53 lines
1.4 KiB
C++
53 lines
1.4 KiB
C++
/*
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* Copyright (c) 2018 Atmosphère-NX
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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 and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope 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
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <functional>
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namespace detail {
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template<typename T>
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struct class_of;
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template<typename Ret, typename C>
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struct class_of<Ret C::*> {
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using type = C;
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};
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template<typename T>
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using class_of_t = typename class_of<T>::type;
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template<typename Mem, typename T, typename C = class_of_t<Mem>>
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struct member_equals_fn_helper {
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T ref;
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Mem mem_fn;
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bool operator()(const C& val) const {
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return (std::mem_fn(mem_fn)(val) == ref);
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}
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bool operator()(C&& val) const {
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return (std::mem_fn(mem_fn)(std::move(val)) == ref);
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}
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};
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} // namespace detail
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template<typename Mem, typename T>
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auto member_equals_fn(Mem mem, T ref) {
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return detail::member_equals_fn_helper<Mem, T>{std::move(ref), std::move(mem)};
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}
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