From 85575856cb16733e8a511c5e7bcfe8f013e1de5a Mon Sep 17 00:00:00 2001
From: =?utf8?q?=D0=A1=D0=B5=D1=80=D0=B3=D0=B5=D0=B9=20=D0=91=D0=B0=D1=80?=
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 <s.barannikov@samsung.com>
Date: Mon, 27 May 2019 07:05:43 +0300
Subject: [PATCH] Overload cpp14::make_unique to support arrays (#5268)

* Overload cpp14::make_unique to support arrays

Extend own implementation of make_unique to support array construction.

Signed-off-by: Sergei Barannikov <s.barannikov@samsung.com>

* Add copyright information.
---
 libs/cpp14/include/cpp14/memory.h | 53 +++++++++++++++++++++++++++++++++------
 1 file changed, 45 insertions(+), 8 deletions(-)

diff --git a/libs/cpp14/include/cpp14/memory.h b/libs/cpp14/include/cpp14/memory.h
index b3e678b..7070e1c 100644
--- a/libs/cpp14/include/cpp14/memory.h
+++ b/libs/cpp14/include/cpp14/memory.h
@@ -1,7 +1,24 @@
+/*
+ * Copyright (c) 2019 Samsung Electronics Co., Ltd. All Rights Reserved
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 /**
  * @file memory.h
  * @ingroup COM_AI_RUNTIME
  * @brief This file contains @c make_unique which is not supported by C++11
+ * @details Implementation is based on http://isocpp.org/files/papers/N3656.txt
  */
 #ifndef __NNFW_CPP14_MEMORY_H__
 #define __NNFW_CPP14_MEMORY_H__
@@ -12,18 +29,38 @@ namespace nnfw
 {
 namespace cpp14
 {
-/**
- * @brief Provide @c make_unique function supported from C++14
- * @param[in] args    List of arguments with which an instance of T will be constructed.
- * @return @c std::unique_ptr of an instance of type T
- */
-template <typename T, typename... Args> std::unique_ptr<T> make_unique(Args &&... args)
+
+template <typename T> struct _Unique_if
+{
+  typedef std::unique_ptr<T> _Single_object;
+};
+
+template <typename T> struct _Unique_if<T[]>
+{
+  typedef std::unique_ptr<T[]> _Unknown_bound;
+};
+
+template <typename T, size_t N> struct _Unique_if<T[N]>
+{
+  typedef void _Known_bound;
+};
+
+template <typename T, typename... Args>
+typename _Unique_if<T>::_Single_object make_unique(Args &&... args)
 {
-  // NOTE std::make_unique is missing in C++11 standard
   return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
 }
 
-} // napesapce cpp14
+template <typename T> typename _Unique_if<T>::_Unknown_bound make_unique(size_t n)
+{
+  typedef typename std::remove_extent<T>::type U;
+  return std::unique_ptr<T>(new U[n]());
+}
+
+template <typename T, typename... Args>
+typename _Unique_if<T>::_Known_bound make_unique(Args &&...) = delete;
+
+} // namespace cpp14
 } // namespace nnfw
 
 #endif // __NNFW_CPP14_MEMORY_H__
-- 
2.7.4