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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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