// // Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2021 // // Distributed under the Boost Software License, Version 1.0. (See accompanying // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) // #pragma once #include "td/utils/common.h" #include <memory> #include <utility> namespace td { class Destructor { public: Destructor() = default; Destructor(const Destructor &other) = delete; Destructor &operator=(const Destructor &other) = delete; Destructor(Destructor &&other) = default; Destructor &operator=(Destructor &&other) = default; virtual ~Destructor() = default; }; template <class F> class LambdaDestructor : public Destructor { public: explicit LambdaDestructor(F &&f) : f_(std::move(f)) { } LambdaDestructor(const LambdaDestructor &other) = delete; LambdaDestructor &operator=(const LambdaDestructor &other) = delete; LambdaDestructor(LambdaDestructor &&other) = default; LambdaDestructor &operator=(LambdaDestructor &&other) = default; ~LambdaDestructor() override { f_(); } private: F f_; }; template <class F> auto create_destructor(F &&f) { return make_unique<LambdaDestructor<F>>(std::forward<F>(f)); } template <class F> auto create_shared_destructor(F &&f) { return std::make_shared<LambdaDestructor<F>>(std::forward<F>(f)); } } // namespace td