1 | //===----------------------------------------------------------------------===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | |
9 | // UNSUPPORTED: c++03, c++11, c++14, c++17 |
10 | |
11 | // <set> |
12 | |
13 | // class set |
14 | |
15 | // template<typename K> bool contains(const K& x) const; // C++20 |
16 | |
17 | #include <cassert> |
18 | #include <set> |
19 | #include <utility> |
20 | |
21 | struct Comp { |
22 | using is_transparent = void; |
23 | |
24 | bool operator()(const std::pair<int, int>& lhs, const std::pair<int, int>& rhs) const { return lhs < rhs; } |
25 | |
26 | bool operator()(const std::pair<int, int>& lhs, int rhs) const { return lhs.first < rhs; } |
27 | |
28 | bool operator()(int lhs, const std::pair<int, int>& rhs) const { return lhs < rhs.first; } |
29 | }; |
30 | |
31 | template <typename Container> |
32 | void test() { |
33 | Container s{{2, 1}, {1, 2}, {1, 3}, {1, 4}, {2, 2}}; |
34 | |
35 | assert(s.contains(1)); |
36 | assert(!s.contains(-1)); |
37 | } |
38 | |
39 | int main(int, char**) { |
40 | test<std::set<std::pair<int, int>, Comp> >(); |
41 | test<std::multiset<std::pair<int, int>, Comp> >(); |
42 | |
43 | return 0; |
44 | } |
45 | |