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Vendor import of libc++ trunk r351319 (just before the release_80
[FreeBSD/FreeBSD.git] / test / std / utilities / function.objects / func.wrap / func.wrap.func / func.wrap.func.cap / operator_bool.pass.cpp
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 // class function<R(ArgTypes...)>
13
14 // explicit operator bool() const
15
16 #include <functional>
17 #include <cassert>
18
19 int g(int) {return 0;}
20
21 int main()
22 {
23     {
24     std::function<int(int)> f;
25     assert(!f);
26     f = g;
27     assert(f);
28     }
29 }