bool.pass.cpp revision 0cdbe6048173c1f05628dbc85430acf191a3e173 
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// <optional>
11
12// constexpr explicit optional<T>::operator bool() const noexcept;
13
14#include <experimental/optional>
15#include <type_traits>
16#include <cassert>
17
18int main()
19{
20#if _LIBCPP_STD_VER > 11
21    using std::experimental::optional;
22
23    {
24        constexpr optional<int> opt;
25        static_assert(!opt, "");
26    }
27    {
28        constexpr optional<int> opt(0);
29        static_assert(opt, "");
30    }
31#endif  // _LIBCPP_STD_VER > 11
32}
33