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// T& optional<T>::operator*(); 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 int test() {return 4;} 30}; 31 32#endif // _LIBCPP_STD_VER > 11 33 34int main() 35{ 36#if _LIBCPP_STD_VER > 11 37 { 38 optional<X> opt(X{}); 39 assert((*opt).test() == 4); 40 } 41#ifdef _LIBCPP_DEBUG 42 { 43 optional<X> opt; 44 assert((*opt).test() == 3); 45 assert(false); 46 } 47#endif // _LIBCPP_DEBUG 48#endif // _LIBCPP_STD_VER > 11 49} 50