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 36struct Z 37{ 38 const Z* operator&() const {return this;} 39 constexpr int test() const {return 1;} 40}; 41 42#endif // _LIBCPP_STD_VER > 11 43 44int main() 45{ 46#if _LIBCPP_STD_VER > 11 47 { 48 constexpr optional<X> opt(X{}); 49 static_assert(opt->test() == 3, ""); 50 } 51 { 52 constexpr optional<Y> opt(Y{}); 53 assert(opt->test() == 2); 54 } 55 { 56 constexpr optional<Z> opt(Z{}); 57 assert(opt->test() == 1); 58 } 59#ifdef _LIBCPP_DEBUG 60 { 61 const optional<X> opt; 62 assert(opt->test() == 3); 63 assert(false); 64 } 65#endif // _LIBCPP_DEBUG 66#endif // _LIBCPP_STD_VER > 11 67} 68