1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// <functional>
11
12// logical_not
13
14#include <functional>
15#include <type_traits>
16#include <cassert>
17
18int main()
19{
20    typedef std::logical_not<int> F;
21    const F f = F();
22    static_assert((std::is_base_of<std::unary_function<int, bool>, F>::value), "");
23    assert(!f(36));
24    assert(f(0));
25#if _LIBCPP_STD_VER > 11
26    typedef std::logical_not<> F2;
27    const F2 f2 = F2();
28    assert(!f2(36));
29    assert( f2(0));
30    assert(!f2(36L));
31    assert( f2(0L));
32
33    constexpr bool foo = std::logical_not<int> () (36);
34    static_assert ( !foo, "" );
35
36    constexpr bool bar = std::logical_not<> () (36);
37    static_assert ( !bar, "" );
38#endif
39}
40