| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++03, c++11, c++14, c++17 |
| |
| // <set> |
| |
| // class set |
| |
| // template<typename K> bool contains(const K& x) const; // C++20 |
| |
| #include <cassert> |
| #include <set> |
| #include <utility> |
| |
| struct Comp { |
| using is_transparent = void; |
| |
| bool operator()(const std::pair<int, int>& lhs, |
| const std::pair<int, int>& rhs) const { |
| return lhs < rhs; |
| } |
| |
| bool operator()(const std::pair<int, int>& lhs, int rhs) const { |
| return lhs.first < rhs; |
| } |
| |
| bool operator()(int lhs, const std::pair<int, int>& rhs) const { |
| return lhs < rhs.first; |
| } |
| }; |
| |
| template <typename Container> |
| void test() { |
| Container s{{2, 1}, {1, 2}, {1, 3}, {1, 4}, {2, 2}}; |
| |
| assert(s.contains(1)); |
| assert(!s.contains(-1)); |
| } |
| |
| int main(int, char**) { |
| test<std::set<std::pair<int, int>, Comp> >(); |
| test<std::multiset<std::pair<int, int>, Comp> >(); |
| |
| return 0; |
| } |