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 // UNSUPPORTED: libcpp-no-concepts
11 
12 // <functional>
13 
14 // Test that std::compare_three_way is defined in <functional>,
15 // not only in <compare>.
16 
17 #include <functional>
18 #include <cassert>
19 
20 int main(int, char**)
21 {
22     assert(std::compare_three_way()(1, 2) < 0);
23     assert(std::compare_three_way()(1, 1) == 0);
24     assert(std::compare_three_way()(2, 1) > 0);
25 
26     return 0;
27 }
28