1
2 /**
3 * Copyright (C) 2018-present MongoDB, Inc.
4 *
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the Server Side Public License, version 1,
7 * as published by MongoDB, Inc.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * Server Side Public License for more details.
13 *
14 * You should have received a copy of the Server Side Public License
15 * along with this program. If not, see
16 * <http://www.mongodb.com/licensing/server-side-public-license>.
17 *
18 * As a special exception, the copyright holders give permission to link the
19 * code of portions of this program with the OpenSSL library under certain
20 * conditions as described in each individual source file and distribute
21 * linked combinations including the program with the OpenSSL library. You
22 * must comply with the Server Side Public License in all respects for
23 * all of the code used other than as permitted herein. If you modify file(s)
24 * with this exception, you may extend this exception to your version of the
25 * file(s), but you are not obligated to do so. If you do not wish to do so,
26 * delete this exception statement from your version. If you delete this
27 * exception statement from all source files in the program, then also delete
28 * it in the license file.
29 */
30
31 #pragma once
32
33 #include <algorithm>
34 #include <iterator>
35 #include <memory>
36 #include <vector>
37
38 namespace mongo {
39 namespace transitional_tools_do_not_use {
40 template <typename T>
unspool_vector(const std::vector<std::unique_ptr<T>> & v)41 inline std::vector<T*> unspool_vector(const std::vector<std::unique_ptr<T>>& v) {
42 std::vector<T*> result;
43 result.reserve(v.size());
44 std::transform(
45 v.begin(), v.end(), std::back_inserter(result), [](const auto& p) { return p.get(); });
46 return result;
47 }
48
49 template <typename T>
spool_vector(const std::vector<T * > & v)50 inline std::vector<std::unique_ptr<T>> spool_vector(const std::vector<T*>& v) noexcept {
51 std::vector<std::unique_ptr<T>> result;
52 result.reserve(v.size());
53 std::transform(v.begin(), v.end(), std::back_inserter(result), [](const auto& p) {
54 return std::unique_ptr<T>{p};
55 });
56 return result;
57 }
58
59 template <typename T>
leak_vector(std::vector<std::unique_ptr<T>> & v)60 inline std::vector<T*> leak_vector(std::vector<std::unique_ptr<T>>& v) noexcept {
61 std::vector<T*> result;
62 result.reserve(v.size());
63 std::transform(
64 v.begin(), v.end(), std::back_inserter(result), [](auto& p) { return p.release(); });
65 return result;
66 }
67 } // namespace transitional_tools_do_not_use
68 } // namespace mongo
69