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Side by Side Diff: mojo/public/cpp/bindings/lib/union_accessor.h

Issue 1410053006: Move third_party/mojo/src/mojo/public to mojo/public (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: merge Created 5 years, 1 month ago
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1 // Copyright 2015 The Chromium Authors. All rights reserved. 1 // Copyright 2015 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 THIRD_PARTY_MOJO_SRC_MOJO_PUBLIC_CPP_BINDINGS_LIB_UNION_ACCESSOR_H_ 5 #ifndef MOJO_PUBLIC_CPP_BINDINGS_LIB_UNION_ACCESSOR_H_
6 #define THIRD_PARTY_MOJO_SRC_MOJO_PUBLIC_CPP_BINDINGS_LIB_UNION_ACCESSOR_H_ 6 #define MOJO_PUBLIC_CPP_BINDINGS_LIB_UNION_ACCESSOR_H_
7 7
8 namespace mojo { 8 namespace mojo {
9 namespace internal { 9 namespace internal {
10 10
11 // When serializing and deserializing Unions, it is necessary to access 11 // When serializing and deserializing Unions, it is necessary to access
12 // the private fields and methods of the Union. This allows us to do that 12 // the private fields and methods of the Union. This allows us to do that
13 // without leaking those same fields and methods in the Union interface. 13 // without leaking those same fields and methods in the Union interface.
14 // All Union wrappers are friends of this class allowing such access. 14 // All Union wrappers are friends of this class allowing such access.
15 template <typename U> 15 template <typename U>
16 class UnionAccessor { 16 class UnionAccessor {
17 public: 17 public:
18 explicit UnionAccessor(U* u) : u_(u) {} 18 explicit UnionAccessor(U* u) : u_(u) {}
19 19
20 typename U::Union_* data() { return &(u_->data_); } 20 typename U::Union_* data() { return &(u_->data_); }
21 21
22 typename U::Tag* tag() { return &(u_->tag_); } 22 typename U::Tag* tag() { return &(u_->tag_); }
23 23
24 void SwitchActive(typename U::Tag new_tag) { u_->SwitchActive(new_tag); } 24 void SwitchActive(typename U::Tag new_tag) { u_->SwitchActive(new_tag); }
25 25
26 private: 26 private:
27 U* u_; 27 U* u_;
28 }; 28 };
29 29
30 } // namespace internal 30 } // namespace internal
31 } // namespace mojo 31 } // namespace mojo
32 32
33 #endif // THIRD_PARTY_MOJO_SRC_MOJO_PUBLIC_CPP_BINDINGS_LIB_UNION_ACCESSOR_H_ 33 #endif // MOJO_PUBLIC_CPP_BINDINGS_LIB_UNION_ACCESSOR_H_
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