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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 // A Tuple is a generic templatized container, similar in concept to std::pair | 5 // A Tuple is a generic templatized container, similar in concept to std::pair |
6 // and std::tuple. The convenient MakeTuple() function takes any number of | 6 // and std::tuple. The convenient MakeTuple() function takes any number of |
7 // arguments and will construct and return the appropriate Tuple object. The | 7 // arguments and will construct and return the appropriate Tuple object. The |
8 // functions DispatchToMethod and DispatchToFunction take a function pointer or | 8 // functions DispatchToMethod and DispatchToFunction take a function pointer or |
9 // instance and method pointer, and unpack a tuple into arguments to the call. | 9 // instance and method pointer, and unpack a tuple into arguments to the call. |
10 // | 10 // |
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33 // Index sequences | 33 // Index sequences |
34 // | 34 // |
35 // Minimal clone of the similarly-named C++14 functionality. | 35 // Minimal clone of the similarly-named C++14 functionality. |
36 | 36 |
37 template <size_t...> | 37 template <size_t...> |
38 struct IndexSequence {}; | 38 struct IndexSequence {}; |
39 | 39 |
40 template <size_t... Ns> | 40 template <size_t... Ns> |
41 struct MakeIndexSequenceImpl; | 41 struct MakeIndexSequenceImpl; |
42 | 42 |
| 43 #if defined(_PREFAST_) && defined(OS_WIN) |
| 44 |
| 45 // Work around VC++ 2013 /analyze internal compiler error: |
| 46 // https://connect.microsoft.com/VisualStudio/feedback/details/1053626 |
| 47 |
| 48 template <> struct MakeIndexSequenceImpl<0> { |
| 49 using Type = IndexSequence<>; |
| 50 }; |
| 51 template <> struct MakeIndexSequenceImpl<1> { |
| 52 using Type = IndexSequence<0>; |
| 53 }; |
| 54 template <> struct MakeIndexSequenceImpl<2> { |
| 55 using Type = IndexSequence<0,1>; |
| 56 }; |
| 57 template <> struct MakeIndexSequenceImpl<3> { |
| 58 using Type = IndexSequence<0,1,2>; |
| 59 }; |
| 60 template <> struct MakeIndexSequenceImpl<4> { |
| 61 using Type = IndexSequence<0,1,2,3>; |
| 62 }; |
| 63 template <> struct MakeIndexSequenceImpl<5> { |
| 64 using Type = IndexSequence<0,1,2,3,4>; |
| 65 }; |
| 66 template <> struct MakeIndexSequenceImpl<6> { |
| 67 using Type = IndexSequence<0,1,2,3,4,5>; |
| 68 }; |
| 69 template <> struct MakeIndexSequenceImpl<7> { |
| 70 using Type = IndexSequence<0,1,2,3,4,5,6>; |
| 71 }; |
| 72 template <> struct MakeIndexSequenceImpl<8> { |
| 73 using Type = IndexSequence<0,1,2,3,4,5,6,7>; |
| 74 }; |
| 75 template <> struct MakeIndexSequenceImpl<9> { |
| 76 using Type = IndexSequence<0,1,2,3,4,5,6,7,8>; |
| 77 }; |
| 78 template <> struct MakeIndexSequenceImpl<10> { |
| 79 using Type = IndexSequence<0,1,2,3,4,5,6,7,8,9>; |
| 80 }; |
| 81 template <> struct MakeIndexSequenceImpl<11> { |
| 82 using Type = IndexSequence<0,1,2,3,4,5,6,7,8,9,10>; |
| 83 }; |
| 84 |
| 85 #else // defined(WIN) && defined(_PREFAST_) |
| 86 |
43 template <size_t... Ns> | 87 template <size_t... Ns> |
44 struct MakeIndexSequenceImpl<0, Ns...> { | 88 struct MakeIndexSequenceImpl<0, Ns...> { |
45 using Type = IndexSequence<Ns...>; | 89 using Type = IndexSequence<Ns...>; |
46 }; | 90 }; |
47 | 91 |
48 template <size_t N, size_t... Ns> | 92 template <size_t N, size_t... Ns> |
49 struct MakeIndexSequenceImpl<N, Ns...> | 93 struct MakeIndexSequenceImpl<N, Ns...> |
50 : MakeIndexSequenceImpl<N - 1, N - 1, Ns...> {}; | 94 : MakeIndexSequenceImpl<N - 1, N - 1, Ns...> {}; |
51 | 95 |
| 96 #endif // defined(WIN) && defined(_PREFAST_) |
| 97 |
52 template <size_t N> | 98 template <size_t N> |
53 using MakeIndexSequence = typename MakeIndexSequenceImpl<N>::Type; | 99 using MakeIndexSequence = typename MakeIndexSequenceImpl<N>::Type; |
54 | 100 |
55 // Traits ---------------------------------------------------------------------- | 101 // Traits ---------------------------------------------------------------------- |
56 // | 102 // |
57 // A simple traits class for tuple arguments. | 103 // A simple traits class for tuple arguments. |
58 // | 104 // |
59 // ValueType: the bare, nonref version of a type (same as the type for nonrefs). | 105 // ValueType: the bare, nonref version of a type (same as the type for nonrefs). |
60 // RefType: the ref version of a type (same as the type for refs). | 106 // RefType: the ref version of a type (same as the type for refs). |
61 // ParamType: what type to pass to functions (refs should not be constified). | 107 // ParamType: what type to pass to functions (refs should not be constified). |
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271 inline void DispatchToMethod(ObjT* obj, | 317 inline void DispatchToMethod(ObjT* obj, |
272 Method method, | 318 Method method, |
273 const Tuple<InTs...>& in, | 319 const Tuple<InTs...>& in, |
274 Tuple<OutTs...>* out) { | 320 Tuple<OutTs...>* out) { |
275 DispatchToMethodImpl(obj, method, in, out, | 321 DispatchToMethodImpl(obj, method, in, out, |
276 MakeIndexSequence<sizeof...(InTs)>(), | 322 MakeIndexSequence<sizeof...(InTs)>(), |
277 MakeIndexSequence<sizeof...(OutTs)>()); | 323 MakeIndexSequence<sizeof...(OutTs)>()); |
278 } | 324 } |
279 | 325 |
280 #endif // BASE_TUPLE_H__ | 326 #endif // BASE_TUPLE_H__ |
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