OLD | NEW |
1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 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 // Use std::tuple as tuple type. This file contains helper functions for | 5 // Use std::tuple as tuple type. This file contains helper functions for |
6 // working with std::tuples. | 6 // working with std::tuples. |
7 // The functions DispatchToMethod and DispatchToFunction take a function pointer | 7 // The functions DispatchToMethod and DispatchToFunction take a function pointer |
8 // or instance and method pointer, and unpack a tuple into arguments to the | 8 // or instance and method pointer, and unpack a tuple into arguments to the |
9 // call. | 9 // call. |
10 // | 10 // |
(...skipping 24 matching lines...) Expand all Loading... |
35 // Index sequences | 35 // Index sequences |
36 // | 36 // |
37 // Minimal clone of the similarly-named C++14 functionality. | 37 // Minimal clone of the similarly-named C++14 functionality. |
38 | 38 |
39 template <size_t...> | 39 template <size_t...> |
40 struct IndexSequence {}; | 40 struct IndexSequence {}; |
41 | 41 |
42 template <size_t... Ns> | 42 template <size_t... Ns> |
43 struct MakeIndexSequenceImpl; | 43 struct MakeIndexSequenceImpl; |
44 | 44 |
45 #if defined(_PREFAST_) && defined(OS_WIN) | |
46 | |
47 // Work around VC++ 2013 /analyze internal compiler error: | |
48 // https://connect.microsoft.com/VisualStudio/feedback/details/1053626 | |
49 | |
50 template <> struct MakeIndexSequenceImpl<0> { | |
51 using Type = IndexSequence<>; | |
52 }; | |
53 template <> struct MakeIndexSequenceImpl<1> { | |
54 using Type = IndexSequence<0>; | |
55 }; | |
56 template <> struct MakeIndexSequenceImpl<2> { | |
57 using Type = IndexSequence<0,1>; | |
58 }; | |
59 template <> struct MakeIndexSequenceImpl<3> { | |
60 using Type = IndexSequence<0,1,2>; | |
61 }; | |
62 template <> struct MakeIndexSequenceImpl<4> { | |
63 using Type = IndexSequence<0,1,2,3>; | |
64 }; | |
65 template <> struct MakeIndexSequenceImpl<5> { | |
66 using Type = IndexSequence<0,1,2,3,4>; | |
67 }; | |
68 template <> struct MakeIndexSequenceImpl<6> { | |
69 using Type = IndexSequence<0,1,2,3,4,5>; | |
70 }; | |
71 template <> struct MakeIndexSequenceImpl<7> { | |
72 using Type = IndexSequence<0,1,2,3,4,5,6>; | |
73 }; | |
74 template <> struct MakeIndexSequenceImpl<8> { | |
75 using Type = IndexSequence<0,1,2,3,4,5,6,7>; | |
76 }; | |
77 template <> struct MakeIndexSequenceImpl<9> { | |
78 using Type = IndexSequence<0,1,2,3,4,5,6,7,8>; | |
79 }; | |
80 template <> struct MakeIndexSequenceImpl<10> { | |
81 using Type = IndexSequence<0,1,2,3,4,5,6,7,8,9>; | |
82 }; | |
83 template <> struct MakeIndexSequenceImpl<11> { | |
84 using Type = IndexSequence<0,1,2,3,4,5,6,7,8,9,10>; | |
85 }; | |
86 template <> struct MakeIndexSequenceImpl<12> { | |
87 using Type = IndexSequence<0,1,2,3,4,5,6,7,8,9,10,11>; | |
88 }; | |
89 template <> struct MakeIndexSequenceImpl<13> { | |
90 using Type = IndexSequence<0,1,2,3,4,5,6,7,8,9,10,11,12>; | |
91 }; | |
92 | |
93 #else // defined(OS_WIN) && defined(_PREFAST_) | |
94 | |
95 template <size_t... Ns> | 45 template <size_t... Ns> |
96 struct MakeIndexSequenceImpl<0, Ns...> { | 46 struct MakeIndexSequenceImpl<0, Ns...> { |
97 using Type = IndexSequence<Ns...>; | 47 using Type = IndexSequence<Ns...>; |
98 }; | 48 }; |
99 | 49 |
100 template <size_t N, size_t... Ns> | 50 template <size_t N, size_t... Ns> |
101 struct MakeIndexSequenceImpl<N, Ns...> | 51 struct MakeIndexSequenceImpl<N, Ns...> |
102 : MakeIndexSequenceImpl<N - 1, N - 1, Ns...> {}; | 52 : MakeIndexSequenceImpl<N - 1, N - 1, Ns...> {}; |
103 | 53 |
104 #endif // defined(OS_WIN) && defined(_PREFAST_) | |
105 | |
106 // std::get() in <=libstdc++-4.6 returns an lvalue-reference for | 54 // std::get() in <=libstdc++-4.6 returns an lvalue-reference for |
107 // rvalue-reference of a tuple, where an rvalue-reference is expected. | 55 // rvalue-reference of a tuple, where an rvalue-reference is expected. |
108 template <size_t I, typename... Ts> | 56 template <size_t I, typename... Ts> |
109 typename std::tuple_element<I, std::tuple<Ts...>>::type&& get( | 57 typename std::tuple_element<I, std::tuple<Ts...>>::type&& get( |
110 std::tuple<Ts...>&& t) { | 58 std::tuple<Ts...>&& t) { |
111 using ElemType = typename std::tuple_element<I, std::tuple<Ts...>>::type; | 59 using ElemType = typename std::tuple_element<I, std::tuple<Ts...>>::type; |
112 return std::forward<ElemType>(std::get<I>(t)); | 60 return std::forward<ElemType>(std::get<I>(t)); |
113 } | 61 } |
114 | 62 |
115 template <size_t I, typename T> | 63 template <size_t I, typename T> |
(...skipping 74 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
190 InTuple&& in, | 138 InTuple&& in, |
191 OutTuple* out) { | 139 OutTuple* out) { |
192 DispatchToMethodImpl(obj, method, std::forward<InTuple>(in), out, | 140 DispatchToMethodImpl(obj, method, std::forward<InTuple>(in), out, |
193 MakeIndexSequenceForTuple<InTuple>(), | 141 MakeIndexSequenceForTuple<InTuple>(), |
194 MakeIndexSequenceForTuple<OutTuple>()); | 142 MakeIndexSequenceForTuple<OutTuple>()); |
195 } | 143 } |
196 | 144 |
197 } // namespace base | 145 } // namespace base |
198 | 146 |
199 #endif // BASE_TUPLE_H_ | 147 #endif // BASE_TUPLE_H_ |
OLD | NEW |