| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <optional> |
| |
| // constexpr explicit optional<T>::operator bool() const noexcept; |
| |
| #include <experimental/optional> |
| #include <type_traits> |
| #include <cassert> |
| |
| int main() |
| { |
| #if _LIBCPP_STD_VER > 11 |
| using std::experimental::optional; |
| |
| { |
| constexpr optional<int> opt; |
| static_assert(!opt, ""); |
| } |
| { |
| constexpr optional<int> opt(0); |
| static_assert(opt, ""); |
| } |
| #endif // _LIBCPP_STD_VER > 11 |
| } |