mirror of
https://github.com/openharmony/ace_ace_engine.git
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zhongjianfei
83819e6e06
Signed-off-by: zhongjianfei <zhongjianfei@huawei.com> Change-Id: I9b8fb68aac65e450cc408aa579f22bc446ea81ec
76 lines
2.6 KiB
C++
76 lines
2.6 KiB
C++
/*
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* Copyright (c) 2021 Huawei Device Co., Ltd.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef FOUNDATION_ACE_FRAMEWORKS_BRIDGE_COMMON_UTILS_FUNCTION_TRAITS_H
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#define FOUNDATION_ACE_FRAMEWORKS_BRIDGE_COMMON_UTILS_FUNCTION_TRAITS_H
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#include <tuple>
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template<typename T>
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struct function_traits;
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template<typename Class, typename ReturnType, typename... Args>
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struct function_traits<ReturnType (Class::*)(Args...)> {
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static constexpr const size_t argc = sizeof...(Args);
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typedef ReturnType returnType;
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using ArgumentPack = std::tuple<Args...>;
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template<size_t i>
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struct argv {
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typedef typename std::tuple_element<i, ArgumentPack>::type type;
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};
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};
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namespace FunctionUtils {
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template<typename C, typename F, typename T, size_t... I>
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auto CallMemberFunction(C* instance, F func, T&& tuple, std::index_sequence<I...>)
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{
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return (instance->*func)(std::get<I>(std::forward<T>(tuple))...);
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}
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template<typename C, typename R, typename Tuple, typename... Types>
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auto CallMemberFunction(C* instance, R (C::*func)(Types...), Tuple&& tup)
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{
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return CallMemberFunction(instance, func, std::forward<Tuple>(tup), std::make_index_sequence<sizeof...(Types)> {});
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}
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template<typename F, typename T, size_t... I>
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auto CallStaticMemberFunction(F func, T&& tuple, std::index_sequence<I...>)
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{
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return func(std::get<I>(std::forward<T>(tuple))...);
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}
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template<typename R, typename Tuple, typename... Types>
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auto CallStaticMemberFunction(R (*func)(Types...), Tuple&& tup)
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{
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return CallStaticMemberFunction(func, std::forward<Tuple>(tup), std::make_index_sequence<sizeof...(Types)> {});
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}
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template<class T, class Tuple, size_t... Is>
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T* ConstructFromTuple(Tuple&& tuple, std::index_sequence<Is...>)
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{
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return new T { std::get<Is>(std::forward<Tuple>(tuple))... };
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}
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template<class T, class Tuple>
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T* ConstructFromTuple(Tuple&& tuple)
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{
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return ConstructFromTuple<T>(
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std::forward<Tuple>(tuple), std::make_index_sequence<std::tuple_size<std::decay_t<Tuple>>::value> {});
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}
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}; // namespace FunctionUtils
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#endif // FOUNDATION_ACE_FRAMEWORKS_BRIDGE_COMMON_UTILS_FUNCTION_TRAITS_H
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