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

Issue 2038273002: Remove base/move.h (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: . Created 4 years, 6 months ago
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1 // Copyright 2014 The Chromium Authors. All rights reserved. 1 // Copyright 2014 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 MOJO_PUBLIC_CPP_BINDINGS_LIB_TEMPLATE_UTIL_H_ 5 #ifndef MOJO_PUBLIC_CPP_BINDINGS_LIB_TEMPLATE_UTIL_H_
6 #define MOJO_PUBLIC_CPP_BINDINGS_LIB_TEMPLATE_UTIL_H_ 6 #define MOJO_PUBLIC_CPP_BINDINGS_LIB_TEMPLATE_UTIL_H_
7 7
8 #include <type_traits> 8 #include <type_traits>
9 9
10 #include "base/template_util.h"
11
10 namespace mojo { 12 namespace mojo {
11 namespace internal { 13 namespace internal {
12 14
13 template <class T, T v> 15 template <class T, T v>
14 struct IntegralConstant { 16 struct IntegralConstant {
15 static const T value = v; 17 static const T value = v;
16 }; 18 };
17 19
18 template <class T, T v> 20 template <class T, T v>
19 const T IntegralConstant<T, v>::value; 21 const T IntegralConstant<T, v>::value;
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45 47
46 struct NoType { 48 struct NoType {
47 YesType dummy[2]; 49 YesType dummy[2];
48 }; 50 };
49 51
50 // A helper template to determine if given type is non-const move-only-type, 52 // A helper template to determine if given type is non-const move-only-type,
51 // i.e. if a value of the given type should be passed via std::move() in a 53 // i.e. if a value of the given type should be passed via std::move() in a
52 // destructive way. 54 // destructive way.
53 template <typename T> 55 template <typename T>
54 struct IsMoveOnlyType { 56 struct IsMoveOnlyType {
55 template <typename U> 57 static const bool value =base::is_move_assignable<T>::value &&
Nico 2016/06/06 18:21:53 i suppose this is clang-format getting this wrong?
dcheng 2016/06/06 18:26:42 Oops, this is me forgetting to upload the clang fo
56 static YesType Test(const typename U::MoveOnlyTypeForCPP03*); 58 !base::is_copy_assignable<T>::value;
57
58 template <typename U>
59 static NoType Test(...);
60
61 static const bool value =
62 sizeof(Test<T>(0)) == sizeof(YesType) && !IsConst<T>::value;
63 }; 59 };
64 60
65 // This goop is a trick used to implement a template that can be used to 61 // This goop is a trick used to implement a template that can be used to
66 // determine if a given class is the base class of another given class. 62 // determine if a given class is the base class of another given class.
67 template <typename, typename> 63 template <typename, typename>
68 struct IsSame { 64 struct IsSame {
69 static bool const value = false; 65 static bool const value = false;
70 }; 66 };
71 template <typename A> 67 template <typename A>
72 struct IsSame<A, A> { 68 struct IsSame<A, A> {
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165 template <typename T, 161 template <typename T,
166 typename std::enable_if<!HasEqualsMethod<T>::value>::type* = nullptr> 162 typename std::enable_if<!HasEqualsMethod<T>::value>::type* = nullptr>
167 bool Equals(const T& a, const T& b) { 163 bool Equals(const T& a, const T& b) {
168 return a == b; 164 return a == b;
169 } 165 }
170 166
171 } // namespace internal 167 } // namespace internal
172 } // namespace mojo 168 } // namespace mojo
173 169
174 #endif // MOJO_PUBLIC_CPP_BINDINGS_LIB_TEMPLATE_UTIL_H_ 170 #endif // MOJO_PUBLIC_CPP_BINDINGS_LIB_TEMPLATE_UTIL_H_
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