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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef Nullable_h | 5 #ifndef Nullable_h |
| 6 #define Nullable_h | 6 #define Nullable_h |
| 7 | 7 |
| 8 #include "platform/heap/Handle.h" | 8 #include "platform/heap/Handle.h" |
| 9 #include "wtf/Assertions.h" | 9 #include "wtf/Assertions.h" |
| 10 | 10 |
| 11 namespace blink { | 11 namespace blink { |
| 12 | 12 |
| 13 template <typename T> | 13 template <typename T> |
| 14 class Nullable { | 14 class Nullable { |
| 15 DISALLOW_ALLOCATION(); | 15 DISALLOW_NEW(); |
| 16 public: | 16 public: |
| 17 Nullable() | 17 Nullable() |
| 18 : m_value() | 18 : m_value() |
| 19 , m_isNull(true) { } | 19 , m_isNull(true) { } |
| 20 | 20 |
| 21 Nullable(std::nullptr_t) | 21 Nullable(std::nullptr_t) |
| 22 : m_value() | 22 : m_value() |
| 23 , m_isNull(true) { } | 23 , m_isNull(true) { } |
| 24 | 24 |
| 25 Nullable(const T& value) | 25 Nullable(const T& value) |
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| 75 } | 75 } |
| 76 | 76 |
| 77 private: | 77 private: |
| 78 T m_value; | 78 T m_value; |
| 79 bool m_isNull; | 79 bool m_isNull; |
| 80 }; | 80 }; |
| 81 | 81 |
| 82 } // namespace blink | 82 } // namespace blink |
| 83 | 83 |
| 84 #endif // Nullable_h | 84 #endif // Nullable_h |
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