//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
// 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/Status.h"
#include <utility>
namespace td {
template <class T>
class optional {
public:
optional() = default;
template <class T1>
optional(T1 &&t) : impl_(std::forward<T1>(t)) {
}
explicit operator bool() {
return impl_.is_ok();
T &value() {
return impl_.ok_ref();
T &operator*() {
return value();
private:
Result<T> impl_;
};
} // namespace td
