mirror of
https://github.com/scylladb/scylladb.git
synced 2026-05-30 11:36:54 +00:00
f3eade2f62
Drop the AGPL license in favor of a source-available license. See the blog post [1] for details. [1] https://www.scylladb.com/2024/12/18/why-were-moving-to-a-source-available-license/
70 lines
1.4 KiB
C++
70 lines
1.4 KiB
C++
/*
|
|
* Copyright 2015-present ScyllaDB
|
|
*/
|
|
|
|
/*
|
|
* SPDX-License-Identifier: LicenseRef-ScyllaDB-Source-Available-1.0
|
|
*/
|
|
|
|
#include <type_traits>
|
|
#include <memory>
|
|
#include <seastar/core/future.hh>
|
|
|
|
#include "seastarx.hh"
|
|
|
|
#pragma once
|
|
|
|
//
|
|
// Utility for adapting types which are not nothrow move constructible into such
|
|
// by wrapping them if necessary.
|
|
//
|
|
// Example usage:
|
|
//
|
|
// T val{};
|
|
// using traits = noexcept_movable<T>;
|
|
// auto f = make_ready_future<typename traits::type>(traits::wrap(std::move(val)));
|
|
// T val2 = traits::unwrap(f.get());
|
|
//
|
|
|
|
template<typename T>
|
|
struct noexcept_movable;
|
|
|
|
template<typename T>
|
|
requires std::is_nothrow_move_constructible_v<T>
|
|
struct noexcept_movable<T> {
|
|
using type = T;
|
|
|
|
static type wrap(T&& v) {
|
|
return std::move(v);
|
|
}
|
|
|
|
static future<T> wrap(future<T>&& v) {
|
|
return std::move(v);
|
|
}
|
|
|
|
static T unwrap(type&& v) {
|
|
return std::move(v);
|
|
}
|
|
|
|
static future<T> unwrap(future<type>&& v) {
|
|
return std::move(v);
|
|
}
|
|
};
|
|
|
|
template<typename T>
|
|
requires (!std::is_nothrow_move_constructible_v<T>)
|
|
struct noexcept_movable<T> {
|
|
using type = std::unique_ptr<T>;
|
|
|
|
static type wrap(T&& v) {
|
|
return std::make_unique<T>(std::move(v));
|
|
}
|
|
|
|
static T unwrap(type&& v) {
|
|
return std::move(*v);
|
|
}
|
|
};
|
|
|
|
template<typename T>
|
|
using noexcept_movable_t = typename noexcept_movable<T>::type;
|