dom/bindings/UnionMember.h@6474c204b198 (annotated)
dom/bindings/UnionMember.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* vim: set ts=8 sts=2 et sw=2 tw=80: */ |
| michael@0 | 3 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 4 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 5 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 6 | |
| michael@0 | 7 | /* A class for holding the members of a union. */ |
| michael@0 | 8 | |
| michael@0 | 9 | #ifndef mozilla_dom_UnionMember_h |
| michael@0 | 10 | #define mozilla_dom_UnionMember_h |
| michael@0 | 11 | |
| michael@0 | 12 | #include "mozilla/Alignment.h" |
| michael@0 | 13 | |
| michael@0 | 14 | namespace mozilla { |
| michael@0 | 15 | namespace dom { |
| michael@0 | 16 | |
| michael@0 | 17 | // The union type has an enum to keep track of which of its UnionMembers has |
| michael@0 | 18 | // been constructed. |
| michael@0 | 19 | template<class T> |
| michael@0 | 20 | class UnionMember |
| michael@0 | 21 | { |
| michael@0 | 22 | AlignedStorage2<T> mStorage; |
| michael@0 | 23 | |
| michael@0 | 24 | public: |
| michael@0 | 25 | T& SetValue() |
| michael@0 | 26 | { |
| michael@0 | 27 | new (mStorage.addr()) T(); |
| michael@0 | 28 | return *mStorage.addr(); |
| michael@0 | 29 | } |
| michael@0 | 30 | template <typename T1> |
| michael@0 | 31 | T& SetValue(const T1& aValue) |
| michael@0 | 32 | { |
| michael@0 | 33 | new (mStorage.addr()) T(aValue); |
| michael@0 | 34 | return *mStorage.addr(); |
| michael@0 | 35 | } |
| michael@0 | 36 | template<typename T1, typename T2> |
| michael@0 | 37 | T& SetValue(const T1& aValue1, const T2& aValue2) |
| michael@0 | 38 | { |
| michael@0 | 39 | new (mStorage.addr()) T(aValue1, aValue2); |
| michael@0 | 40 | return *mStorage.addr(); |
| michael@0 | 41 | } |
| michael@0 | 42 | T& Value() |
| michael@0 | 43 | { |
| michael@0 | 44 | return *mStorage.addr(); |
| michael@0 | 45 | } |
| michael@0 | 46 | const T& Value() const |
| michael@0 | 47 | { |
| michael@0 | 48 | return *mStorage.addr(); |
| michael@0 | 49 | } |
| michael@0 | 50 | void Destroy() |
| michael@0 | 51 | { |
| michael@0 | 52 | mStorage.addr()->~T(); |
| michael@0 | 53 | } |
| michael@0 | 54 | }; |
| michael@0 | 55 | |
| michael@0 | 56 | } // namespace dom |
| michael@0 | 57 | } // namespace mozilla |
| michael@0 | 58 | |
| michael@0 | 59 | #endif // mozilla_dom_UnionMember_h |
