Dan Albert | 287553d | 2017-02-16 10:47:51 -0800 | [diff] [blame] | 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> constexpr bool operator>= (const optional<T>& x, const optional<T>& y); |
| 13 | |
| 14 | #include <experimental/optional> |
| 15 | |
| 16 | #if _LIBCPP_STD_VER > 11 |
| 17 | |
| 18 | using std::experimental::optional; |
| 19 | |
| 20 | struct X |
| 21 | { |
| 22 | int i_; |
| 23 | |
| 24 | constexpr X(int i) : i_(i) {} |
| 25 | }; |
| 26 | |
| 27 | constexpr bool operator < ( const X &lhs, const X &rhs ) |
| 28 | { return lhs.i_ < rhs.i_ ; } |
| 29 | |
| 30 | #endif |
| 31 | |
| 32 | int main() |
| 33 | { |
| 34 | #if _LIBCPP_STD_VER > 11 |
| 35 | { |
| 36 | typedef optional<X> O; |
| 37 | |
| 38 | constexpr O o1; // disengaged |
| 39 | constexpr O o2; // disengaged |
| 40 | constexpr O o3{1}; // engaged |
| 41 | constexpr O o4{2}; // engaged |
| 42 | constexpr O o5{1}; // engaged |
| 43 | |
| 44 | static_assert ( (o1 >= o1), "" ); |
| 45 | static_assert ( (o1 >= o2), "" ); |
| 46 | static_assert ( !(o1 >= o3), "" ); |
| 47 | static_assert ( !(o1 >= o4), "" ); |
| 48 | static_assert ( !(o1 >= o5), "" ); |
| 49 | |
| 50 | static_assert ( (o2 >= o1), "" ); |
| 51 | static_assert ( (o2 >= o2), "" ); |
| 52 | static_assert ( !(o2 >= o3), "" ); |
| 53 | static_assert ( !(o2 >= o4), "" ); |
| 54 | static_assert ( !(o2 >= o5), "" ); |
| 55 | |
| 56 | static_assert ( (o3 >= o1), "" ); |
| 57 | static_assert ( (o3 >= o2), "" ); |
| 58 | static_assert ( (o3 >= o3), "" ); |
| 59 | static_assert ( !(o3 >= o4), "" ); |
| 60 | static_assert ( (o3 >= o5), "" ); |
| 61 | |
| 62 | static_assert ( (o4 >= o1), "" ); |
| 63 | static_assert ( (o4 >= o2), "" ); |
| 64 | static_assert ( (o4 >= o3), "" ); |
| 65 | static_assert ( (o4 >= o4), "" ); |
| 66 | static_assert ( (o4 >= o5), "" ); |
| 67 | |
| 68 | static_assert ( (o5 >= o1), "" ); |
| 69 | static_assert ( (o5 >= o2), "" ); |
| 70 | static_assert ( (o5 >= o3), "" ); |
| 71 | static_assert ( !(o5 >= o4), "" ); |
| 72 | static_assert ( (o5 >= o5), "" ); |
| 73 | } |
| 74 | #endif |
| 75 | } |