xref: /llvm-project/libcxx/test/std/containers/associative/map/map.ops/contains_transparent.pass.cpp (revision 3fca07d7b9a29fe829c8f04642d35a3bbb94d4d1)
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 #include <cassert>
12 #include <map>
13 
14 // <map>
15 
16 // template<class K> bool contains(const K& x) const; // C++20
17 
18 struct Comp {
19   using is_transparent = void;
20 
operator ()Comp21   bool operator()(const std::pair<int, int>& lhs,
22                   const std::pair<int, int>& rhs) const {
23     return lhs < rhs;
24   }
25 
operator ()Comp26   bool operator()(const std::pair<int, int>& lhs, int rhs) const {
27     return lhs.first < rhs;
28   }
29 
operator ()Comp30   bool operator()(int lhs, const std::pair<int, int>& rhs) const {
31     return lhs < rhs.first;
32   }
33 };
34 
35 template <typename Container>
test()36 void test() {
37   Container s{{{2, 1}, 1}, {{1, 2}, 2}, {{1, 3}, 3}, {{1, 4}, 4}, {{2, 2}, 5}};
38 
39   assert(s.contains(1));
40   assert(!s.contains(-1));
41 }
42 
main(int,char **)43 int main(int, char**) {
44   test<std::map<std::pair<int, int>, int, Comp> >();
45   test<std::multimap<std::pair<int, int>, int, Comp> >();
46 
47   return 0;
48 }
49