//===----------------------------------------------------------------------===// // // The LLVM Compiler Infrastructure // // This file is dual licensed under the MIT and the University of Illinois Open // Source Licenses. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // <optional> // template <class T> constexpr bool operator<= (const optional<T>& x, const optional<T>& y); #include <experimental/optional> #if _LIBCPP_STD_VER > 11 using std::experimental::optional; struct X { int i_; constexpr X(int i) : i_(i) {} }; constexpr bool operator < ( const X &lhs, const X &rhs ) { return lhs.i_ < rhs.i_ ; } #endif int main() { #if _LIBCPP_STD_VER > 11 { typedef optional<X> O; constexpr O o1; // disengaged constexpr O o2; // disengaged constexpr O o3{1}; // engaged constexpr O o4{2}; // engaged constexpr O o5{1}; // engaged static_assert ( (o1 <= o1), "" ); static_assert ( (o1 <= o2), "" ); static_assert ( (o1 <= o3), "" ); static_assert ( (o1 <= o4), "" ); static_assert ( (o1 <= o5), "" ); static_assert ( (o2 <= o1), "" ); static_assert ( (o2 <= o2), "" ); static_assert ( (o2 <= o3), "" ); static_assert ( (o2 <= o4), "" ); static_assert ( (o2 <= o5), "" ); static_assert ( !(o3 <= o1), "" ); static_assert ( !(o3 <= o2), "" ); static_assert ( (o3 <= o3), "" ); static_assert ( (o3 <= o4), "" ); static_assert ( (o3 <= o5), "" ); static_assert ( !(o4 <= o1), "" ); static_assert ( !(o4 <= o2), "" ); static_assert ( !(o4 <= o3), "" ); static_assert ( (o4 <= o4), "" ); static_assert ( !(o4 <= o5), "" ); static_assert ( !(o5 <= o1), "" ); static_assert ( !(o5 <= o2), "" ); static_assert ( (o5 <= o3), "" ); static_assert ( (o5 <= o4), "" ); static_assert ( (o5 <= o5), "" ); } #endif }