| Index: third_party/WebKit/Source/core/layout/ng/ptr_util.h
|
| diff --git a/third_party/WebKit/Source/core/layout/ng/ptr_util.h b/third_party/WebKit/Source/core/layout/ng/ptr_util.h
|
| new file mode 100644
|
| index 0000000000000000000000000000000000000000..5bf1545c9b5381edf1369d41a18ba62cf6def9b0
|
| --- /dev/null
|
| +++ b/third_party/WebKit/Source/core/layout/ng/ptr_util.h
|
| @@ -0,0 +1,57 @@
|
| +// Copyright 2016 The Chromium Authors. All rights reserved.
|
| +// Use of this source code is governed by a BSD-style license that can be
|
| +// found in the LICENSE file.
|
| +
|
| +#ifndef ptr_util_h
|
| +#define ptr_util_h
|
| +
|
| +#include <memory>
|
| +#include <utility>
|
| +
|
| +// This is a partial copy of base/memory/ptr_util.h that sadly cannot be used in
|
| +// Blink because of "-base" from third_party's include_rules.
|
| +// TODO(glebl): move to WebKit/base? similar to
|
| +// third_party/pdfium/third_party/base/ptr_util.h
|
| +
|
| +namespace blink {
|
| +
|
| +namespace {
|
| +
|
| +template <typename T>
|
| +struct MakeUniqueResult {
|
| + using Scalar = std::unique_ptr<T>;
|
| +};
|
| +
|
| +template <typename T>
|
| +struct MakeUniqueResult<T[]> {
|
| + using Array = std::unique_ptr<T[]>;
|
| +};
|
| +
|
| +template <typename T, size_t N>
|
| +struct MakeUniqueResult<T[N]> {
|
| + using Invalid = void;
|
| +};
|
| +
|
| +} // namespace
|
| +
|
| +// Helper to construct an object wrapped in a std::unique_ptr. This is an
|
| +// implementation of C++14's std::MakeUnique that can be used in Chrome.
|
| +//
|
| +// MakeUnique<T>(args) should be preferred over WrapUnique(new T(args)): bare
|
| +// calls to `new` should be treated with scrutiny.
|
| +//
|
| +// Usage:
|
| +// // ptr is a std::unique_ptr<std::string>
|
| +// auto ptr = MakeUnique<std::string>("hello world!");
|
| +//
|
| +// // arr is a std::unique_ptr<int[]>
|
| +// auto arr = MakeUnique<int[]>(5);
|
| +
|
| +// Overload for non-array types. Arguments are forwarded to T's constructor.
|
| +template <typename T, typename... Args>
|
| +typename MakeUniqueResult<T>::Scalar MakeUnique(Args&&... args) {
|
| + return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
|
| +}
|
| +
|
| +} // namespace blink
|
| +#endif // ptr_util_h
|
|
|