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 const T& optional<T>::operator*() const; 13 14#ifdef _LIBCPP_DEBUG 15#define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0)) 16#endif 17 18#include <experimental/optional> 19#include <type_traits> 20#include <cassert> 21 22#if _LIBCPP_STD_VER > 11 23 24using std::experimental::optional; 25 26struct X 27{ 28 constexpr int test() const {return 3;} 29}; 30 31struct Y 32{ 33 int test() const {return 2;} 34}; 35 36#endif // _LIBCPP_STD_VER > 11 37 38int main() 39{ 40#if _LIBCPP_STD_VER > 11 41 { 42 constexpr optional<X> opt(X{}); 43 static_assert((*opt).test() == 3, ""); 44 } 45 { 46 constexpr optional<Y> opt(Y{}); 47 assert((*opt).test() == 2); 48 } 49#ifdef _LIBCPP_DEBUG 50 { 51 const optional<X> opt; 52 assert((*opt).test() == 3); 53 assert(false); 54 } 55#endif // _LIBCPP_DEBUG 56#endif // _LIBCPP_STD_VER > 11 57} 58