The Tor Browser / file comparison
comparison: dom/bindings/UnionMember.h
dom/bindings/UnionMember.h
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:c72975cd5637 |
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| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */ | |
| 3 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 /* A class for holding the members of a union. */ | |
| 8 | |
| 9 #ifndef mozilla_dom_UnionMember_h | |
| 10 #define mozilla_dom_UnionMember_h | |
| 11 | |
| 12 #include "mozilla/Alignment.h" | |
| 13 | |
| 14 namespace mozilla { | |
| 15 namespace dom { | |
| 16 | |
| 17 // The union type has an enum to keep track of which of its UnionMembers has | |
| 18 // been constructed. | |
| 19 template<class T> | |
| 20 class UnionMember | |
| 21 { | |
| 22 AlignedStorage2<T> mStorage; | |
| 23 | |
| 24 public: | |
| 25 T& SetValue() | |
| 26 { | |
| 27 new (mStorage.addr()) T(); | |
| 28 return *mStorage.addr(); | |
| 29 } | |
| 30 template <typename T1> | |
| 31 T& SetValue(const T1& aValue) | |
| 32 { | |
| 33 new (mStorage.addr()) T(aValue); | |
| 34 return *mStorage.addr(); | |
| 35 } | |
| 36 template<typename T1, typename T2> | |
| 37 T& SetValue(const T1& aValue1, const T2& aValue2) | |
| 38 { | |
| 39 new (mStorage.addr()) T(aValue1, aValue2); | |
| 40 return *mStorage.addr(); | |
| 41 } | |
| 42 T& Value() | |
| 43 { | |
| 44 return *mStorage.addr(); | |
| 45 } | |
| 46 const T& Value() const | |
| 47 { | |
| 48 return *mStorage.addr(); | |
| 49 } | |
| 50 void Destroy() | |
| 51 { | |
| 52 mStorage.addr()->~T(); | |
| 53 } | |
| 54 }; | |
| 55 | |
| 56 } // namespace dom | |
| 57 } // namespace mozilla | |
| 58 | |
| 59 #endif // mozilla_dom_UnionMember_h |
