FTXUI/include/ftxui/util/autoreset.hpp
2024-05-01 14:32:22 +02:00

33 lines
907 B
C++

// Copyright 2020 Arthur Sonzogni. All rights reserved.
// Use of this source code is governed by the MIT license that can be found in
// the LICENSE file.
#ifndef FTXUI_UTIL_AUTORESET_HPP
#define FTXUI_UTIL_AUTORESET_HPP
#include <utility>
namespace ftxui {
/// Assign a value to a variable, reset its old value when going out of scope.
template <typename T>
class AutoReset {
public:
AutoReset(T* variable, T new_value)
: variable_(variable), previous_value_(std::move(*variable)) {
*variable_ = std::move(new_value);
}
AutoReset(const AutoReset&) = delete;
AutoReset(AutoReset&&) = delete;
AutoReset& operator=(const AutoReset&) = delete;
AutoReset& operator=(AutoReset&&) = delete;
~AutoReset() { *variable_ = std::move(previous_value_); }
private:
T* variable_;
T previous_value_;
};
} // namespace ftxui
#endif /* end of include guard: FTXUI_UTIL_AUTORESET_HPP */