94 lines
2.2 KiB
C
94 lines
2.2 KiB
C
|
//
|
||
|
|
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2023
|
||
|
|
//
|
||
|
|
// 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
|
||
|
|
|
||
|
|
#include "td/utils/unique_ptr.h"
|
||
|
|
|
||
|
|
#include <cstddef>
|
||
|
|
#include <utility>
|
||
|
|
|
||
|
|
namespace td {
|
||
|
|
|
||
|
|
// copyable by value td::unique_ptr
|
||
|
|
template <class T>
|
||
|
|
class unique_value_ptr final {
|
||
|
|
public:
|
||
|
|
unique_value_ptr() noexcept = default;
|
||
|
|
unique_value_ptr(const unique_value_ptr &other) {
|
||
|
|
if (other != nullptr) {
|
||
|
|
ptr_ = make_unique<T>(*other);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
unique_value_ptr &operator=(const unique_value_ptr &other) {
|
||
|
|
if (other == nullptr) {
|
||
|
|
ptr_ = nullptr;
|
||
|
|
} else {
|
||
|
|
ptr_ = make_unique<T>(*other);
|
||
|
|
}
|
||
|
|
return *this;
|
||
|
|
}
|
||
|
|
unique_value_ptr(unique_value_ptr &&other) noexcept = default;
|
||
|
|
unique_value_ptr &operator=(unique_value_ptr &&other) = default;
|
||
|
|
unique_value_ptr(std::nullptr_t) noexcept {
|
||
|
|
}
|
||
|
|
unique_value_ptr(unique_ptr<T> &&ptr) noexcept : ptr_(std::move(ptr)) {
|
||
|
|
}
|
||
|
|
T *get() noexcept {
|
||
|
|
return ptr_.get();
|
||
|
|
}
|
||
|
|
const T *get() const noexcept {
|
||
|
|
return ptr_.get();
|
||
|
|
}
|
||
|
|
T *operator->() noexcept {
|
||
|
|
return ptr_.get();
|
||
|
|
}
|
||
|
|
const T *operator->() const noexcept {
|
||
|
|
return ptr_.get();
|
||
|
|
}
|
||
|
|
T &operator*() noexcept {
|
||
|
|
return *ptr_;
|
||
|
|
}
|
||
|
|
const T &operator*() const noexcept {
|
||
|
|
return *ptr_;
|
||
|
|
}
|
||
|
|
explicit operator bool() const noexcept {
|
||
|
|
return ptr_ != nullptr;
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
unique_ptr<T> ptr_;
|
||
|
|
};
|
||
|
|
|
||
|
|
template <class T>
|
||
|
|
bool operator==(const unique_value_ptr<T> &p, std::nullptr_t) {
|
||
|
|
return !p;
|
||
|
|
}
|
||
|
|
template <class T>
|
||
|
|
bool operator!=(const unique_value_ptr<T> &p, std::nullptr_t) {
|
||
|
|
return static_cast<bool>(p);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <class T>
|
||
|
|
bool operator==(const unique_value_ptr<T> &lhs, const unique_value_ptr<T> &rhs) {
|
||
|
|
if (lhs == nullptr) {
|
||
|
|
return rhs == nullptr;
|
||
|
|
}
|
||
|
|
return rhs != nullptr && *lhs == *rhs;
|
||
|
|
}
|
||
|
|
|
||
|
|
template <class T>
|
||
|
|
bool operator!=(const unique_value_ptr<T> &lhs, const unique_value_ptr<T> &rhs) {
|
||
|
|
return !(lhs == rhs);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <class Type, class... Args>
|
||
|
|
unique_value_ptr<Type> make_unique_value(Args &&...args) {
|
||
|
|
return unique_value_ptr<Type>(make_unique<Type>(std::forward<Args>(args)...));
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace td
|