1 /*
2  * Copyright (C) 2019 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef BERBERIS_BASE_DEPENDENT_FALSE_H_
18 #define BERBERIS_BASE_DEPENDENT_FALSE_H_
19 
20 #include <type_traits>
21 
22 namespace berberis {
23 
24 template <typename T>
25 inline constexpr bool kDependentTypeFalse = false;
26 
27 template <auto A>
28 inline constexpr bool kDependentValueFalse = false;
29 
30 template <typename T>
31 class ImpossibleTypeConst {
32   static_assert(false);
33   static constexpr bool kValue = false;
34 };
35 
36 template <typename T>
37 inline constexpr bool kImpossibleTypeConst = ImpossibleTypeConst<T>::kValue;
38 
39 template <auto A>
40 class ImpossibleValueConst {
41   static_assert(false);
42   static constexpr bool kValue = false;
43 };
44 
45 template <auto A>
46 inline constexpr bool kImpossibleValueConst = ImpossibleValueConst<A>::kValue;
47 
48 }  // namespace berberis
49 
50 #endif  // BERBERIS_BASE_DEPENDENT_FALSE_H_
51