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 |