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 // <functional>
10
11 // less
12
13 #include <functional>
14 #include <type_traits>
15 #include <cassert>
16
17 #include "test_macros.h"
18 #include "pointer_comparison_test_helper.h"
19
main(int,char **)20 int main(int, char**)
21 {
22 typedef std::less<int> F;
23 const F f = F();
24 static_assert((std::is_same<int, F::first_argument_type>::value), "" );
25 static_assert((std::is_same<int, F::second_argument_type>::value), "" );
26 static_assert((std::is_same<bool, F::result_type>::value), "" );
27 assert(!f(36, 36));
28 assert(!f(36, 6));
29 assert(f(6, 36));
30 {
31 // test total ordering of int* for less<int*> and less<void>.
32 do_pointer_comparison_test<int, std::less>();
33 }
34 #if TEST_STD_VER > 11
35 typedef std::less<> F2;
36 const F2 f2 = F2();
37 assert(!f2(36, 36));
38 assert(!f2(36, 6));
39 assert( f2(6, 36));
40 assert(!f2(36, 6.0));
41 assert(!f2(36.0, 6));
42 assert( f2(6, 36.0));
43 assert( f2(6.0, 36));
44
45 constexpr bool foo = std::less<int> () (36, 36);
46 static_assert ( !foo, "" );
47
48 constexpr bool bar = std::less<> () (36.0, 36);
49 static_assert ( !bar, "" );
50 #endif
51
52 return 0;
53 }
54