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 // UNSUPPORTED: c++98, c++03, c++11 11 // <optional> 12 13 // constexpr T* optional<T>::operator->(); 14 15 #ifdef _LIBCPP_DEBUG 16 #define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0)) 17 #endif 18 19 #include <experimental/optional> 20 #include <type_traits> 21 #include <cassert> 22 23 using std::experimental::optional; 24 25 struct X 26 { 27 constexpr int test() const {return 3;} 28 }; 29 30 int main() 31 { 32 { 33 constexpr optional<X> opt(X{}); 34 static_assert(opt->test() == 3, ""); 35 } 36 #ifdef _LIBCPP_DEBUG 37 { 38 optional<X> opt; 39 assert(opt->test() == 3); 40 assert(false); 41 } 42 #endif // _LIBCPP_DEBUG 43 } 44
