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53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
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/*
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This file is part of TON Blockchain Library.
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TON Blockchain Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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TON Blockchain Library 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 Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2017-2019 Telegram Systems LLP
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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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val_ = other.val_;
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other.clear();
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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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