Chromium Code Reviews| 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 |
|
ikilpatrick
2016/10/31 21:36:08
would prefer to wait until we have this in wtf ins
Gleb Lanbin
2016/10/31 23:08:18
deleted
|
| +#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 |