60 lines
1.3 KiB
C++
60 lines
1.3 KiB
C++
/**
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* @file src/move_by_copy.h
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* @brief Declarations for the MoveByCopy utility class.
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*/
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#pragma once
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// standard includes
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#include <utility>
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/**
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* @brief Contains utilities for moving objects by copying them.
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*/
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namespace move_by_copy_util {
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/**
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* When a copy is made, it moves the object
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* This allows you to move an object when a move can't be done.
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*/
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template<class T>
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class MoveByCopy {
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public:
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typedef T move_type;
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private:
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move_type _to_move;
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public:
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explicit MoveByCopy(move_type &&to_move):
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_to_move(std::move(to_move)) {
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}
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MoveByCopy(MoveByCopy &&other) = default;
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MoveByCopy(const MoveByCopy &other) {
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*this = other;
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}
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MoveByCopy &operator=(MoveByCopy &&other) = default;
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MoveByCopy &operator=(const MoveByCopy &other) {
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this->_to_move = std::move(const_cast<MoveByCopy &>(other)._to_move);
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return *this;
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}
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operator move_type() {
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return std::move(_to_move);
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}
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};
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template<class T>
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MoveByCopy<T> cmove(T &movable) {
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return MoveByCopy<T>(std::move(movable));
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}
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// Do NOT use this unless you are absolutely certain the object to be moved is no longer used by the caller
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template<class T>
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MoveByCopy<T> const_cmove(const T &movable) {
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return MoveByCopy<T>(std::move(const_cast<T &>(movable)));
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}
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} // namespace move_by_copy_util
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