41 lines
900 B
C++
41 lines
900 B
C++
//
|
|
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2017
|
|
//
|
|
// 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
|
|
|
|
namespace td {
|
|
|
|
template <class T, T empty_val = T()>
|
|
class MovableValue {
|
|
public:
|
|
MovableValue() = default;
|
|
MovableValue(T val) : val_(val) {
|
|
}
|
|
MovableValue(MovableValue &&other) : val_(other.val_) {
|
|
other.clear();
|
|
}
|
|
MovableValue &operator=(MovableValue &&other) {
|
|
val_ = other.val_;
|
|
other.clear();
|
|
return *this;
|
|
}
|
|
MovableValue(const MovableValue &) = delete;
|
|
MovableValue &operator=(const MovableValue &) = delete;
|
|
~MovableValue() = default;
|
|
|
|
void clear() {
|
|
val_ = empty_val;
|
|
}
|
|
const T &get() const {
|
|
return val_;
|
|
}
|
|
|
|
private:
|
|
T val_ = empty_val;
|
|
};
|
|
|
|
} // namespace td
|