types.pass.cpp revision 0cdbe6048173c1f05628dbc85430acf191a3e173
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// template <class T> 13// class optional 14// { 15// public: 16// typedef T value_type; 17// ... 18 19#include <experimental/optional> 20#include <type_traits> 21 22#if _LIBCPP_STD_VER > 11 23 24using std::experimental::optional; 25 26template <class Opt, class T> 27void 28test() 29{ 30 static_assert(std::is_same<typename Opt::value_type, T>::value, ""); 31} 32 33#endif // _LIBCPP_STD_VER > 11 34 35int main() 36{ 37#if _LIBCPP_STD_VER > 11 38 test<optional<int>, int>(); 39 test<optional<const int>, const int>(); 40 test<optional<double>, double>(); 41 test<optional<const double>, const double>(); 42#endif // _LIBCPP_STD_VER > 11 43} 44