101afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant//===----------------------------------------------------------------------===// 201afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant// 301afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant// The LLVM Compiler Infrastructure 401afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant// 501afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant// This file is dual licensed under the MIT and the University of Illinois Open 601afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant// Source Licenses. See LICENSE.TXT for details. 701afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant// 801afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant//===----------------------------------------------------------------------===// 901afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant 1001afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant// <optional> 1101afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant 1201afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant// T& optional<T>::operator*(); 1301afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant 1401afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant#ifdef _LIBCPP_DEBUG 1501afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant#define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0)) 1601afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant#endif 1701afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant 180cdbe6048173c1f05628dbc85430acf191a3e173Marshall Clow#include <experimental/optional> 1901afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant#include <type_traits> 2001afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant#include <cassert> 2101afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant 2201afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant#if _LIBCPP_STD_VER > 11 2301afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant 240cdbe6048173c1f05628dbc85430acf191a3e173Marshall Clowusing std::experimental::optional; 250cdbe6048173c1f05628dbc85430acf191a3e173Marshall Clow 2601afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnantstruct X 2701afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant{ 2801afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant constexpr int test() const {return 3;} 2901afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant int test() {return 4;} 3001afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant}; 3101afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant 3201afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant#endif // _LIBCPP_STD_VER > 11 3301afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant 3401afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnantint main() 3501afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant{ 3601afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant#if _LIBCPP_STD_VER > 11 3701afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant { 380cdbe6048173c1f05628dbc85430acf191a3e173Marshall Clow optional<X> opt(X{}); 3901afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant assert((*opt).test() == 4); 4001afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant } 4101afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant#ifdef _LIBCPP_DEBUG 4201afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant { 430cdbe6048173c1f05628dbc85430acf191a3e173Marshall Clow optional<X> opt; 4401afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant assert((*opt).test() == 3); 4501afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant assert(false); 4601afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant } 4701afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant#endif // _LIBCPP_DEBUG 4801afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant#endif // _LIBCPP_STD_VER > 11 4901afa5c6e407e985d9643707d7b7ab1384bd9317Howard Hinnant} 50