43 lines
936 B
C++
43 lines
936 B
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2020
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#pragma once
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namespace td {
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template <class T, T empty_val = T()>
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class MovableValue {
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public:
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MovableValue() = default;
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MovableValue(T val) : val_(val) {
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}
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MovableValue(MovableValue &&other) : val_(other.val_) {
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other.clear();
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}
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MovableValue &operator=(MovableValue &&other) {
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if (this != &other) {
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val_ = other.val_;
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other.clear();
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}
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return *this;
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}
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MovableValue(const MovableValue &) = delete;
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MovableValue &operator=(const MovableValue &) = delete;
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~MovableValue() = default;
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void clear() {
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val_ = empty_val;
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}
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const T &get() const {
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return val_;
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}
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private:
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T val_ = empty_val;
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};
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} // namespace td
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