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 // greater
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::greater<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 greater<int*> and
32 // greater<void>.
33 do_pointer_comparison_test<int, std::greater>();
34 }
35 #if TEST_STD_VER > 11
36 typedef std::greater<> F2;
37 const F2 f2 = F2();
38 assert(!f2(36, 36));
39 assert(f2(36, 6));
40 assert(!f2(6, 36));
41 assert( f2(36, 6.0));
42 assert( f2(36.0, 6));
43 assert(!f2(6, 36.0));
44 assert(!f2(6.0, 36));
45
46 constexpr bool foo = std::greater<int> () (36, 36);
47 static_assert ( !foo, "" );
48
49 constexpr bool bar = std::greater<> () (36.0, 36);
50 static_assert ( !bar, "" );
51 #endif
52
53 return 0;
54 }
55