1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // UNSUPPORTED: c++03, c++11, c++14 10 // <optional> 11 12 // constexpr explicit optional<T>::operator bool() const noexcept; 13 14 #include <optional> 15 #include <type_traits> 16 #include <cassert> 17 18 #include "test_macros.h" 19 main(int,char **)20int main(int, char**) 21 { 22 using std::optional; 23 { 24 const optional<int> opt; ((void)opt); 25 ASSERT_NOEXCEPT(bool(opt)); 26 static_assert(!std::is_convertible<optional<int>, bool>::value, ""); 27 } 28 { 29 constexpr optional<int> opt; 30 static_assert(!opt, ""); 31 } 32 { 33 constexpr optional<int> opt(0); 34 static_assert(opt, ""); 35 } 36 37 return 0; 38 } 39