Marco Poletti | 36253c9 | 2015-07-19 17:12:47 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2014 Google Inc. All rights reserved. |
| 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 |
Marco Poletti | 1b959ab | 2017-12-27 09:23:44 +0000 | [diff] [blame] | 7 | * |
Marco Poletti | 36253c9 | 2015-07-19 17:12:47 +0100 | [diff] [blame] | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
Marco Poletti | 1b959ab | 2017-12-27 09:23:44 +0000 | [diff] [blame] | 9 | * |
Marco Poletti | 36253c9 | 2015-07-19 17:12:47 +0100 | [diff] [blame] | 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 FRUIT_META_PAIR_H |
| 18 | #define FRUIT_META_PAIR_H |
| 19 | |
Marco Poletti | f289510 | 2016-01-30 13:38:37 +0000 | [diff] [blame] | 20 | #include <fruit/impl/meta/basics.h> |
Marco Poletti | 36253c9 | 2015-07-19 17:12:47 +0100 | [diff] [blame] | 21 | |
| 22 | namespace fruit { |
| 23 | namespace impl { |
| 24 | namespace meta { |
| 25 | |
| 26 | template <typename First1, typename Second1> |
| 27 | struct Pair { |
| 28 | using First = First1; |
| 29 | using Second = Second1; |
| 30 | }; |
| 31 | |
| 32 | struct MakePair { |
| 33 | template <typename First, typename Second> |
| 34 | struct apply { |
| 35 | using type = Pair<First, Second>; |
| 36 | }; |
| 37 | }; |
| 38 | |
| 39 | struct GetFirst { |
| 40 | template <typename P> |
| 41 | struct apply { |
| 42 | using type = typename P::First; |
| 43 | }; |
| 44 | }; |
| 45 | |
| 46 | struct GetSecond { |
| 47 | template <typename P> |
| 48 | struct apply { |
| 49 | using type = typename P::Second; |
| 50 | }; |
| 51 | }; |
| 52 | |
| 53 | } // namespace meta |
| 54 | } // namespace impl |
| 55 | } // namespace fruit |
| 56 | |
Marco Poletti | 36253c9 | 2015-07-19 17:12:47 +0100 | [diff] [blame] | 57 | #endif // FRUIT_META_PAIR_H |