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 // unary_negate
13 
14 #include <functional>
15 #include <type_traits>
16 #include <cassert>
17 
18 int main()
19 {
20     typedef std::unary_negate<std::logical_not<int> > F;
21     const F f = F(std::logical_not<int>());
22     static_assert((std::is_base_of<std::unary_function<int, bool>, F>::value), "");
23     assert(f(36));
24     assert(!f(0));
25 }
26