1 //===----------------------------------------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // UNSUPPORTED: c++98, c++03, c++11, c++14
13 // template <class T> constexpr bool operator!=(const optional<T>& x, const T& v);
14 // template <class T> constexpr bool operator!=(const T& v, const optional<T>& x);
24 constexpr X(int i) : i_(i) {}
27 constexpr bool operator != ( const X &lhs, const X &rhs )
28 { return lhs.i_ != rhs.i_ ; }
34 typedef optional<T> O;
37 constexpr O o1; // disengaged
38 constexpr O o2{1}; // engaged
39 constexpr O o3{val}; // engaged
41 static_assert ( (o1 != T(1)), "" );
42 static_assert ( !(o2 != T(1)), "" );
43 static_assert ( (o3 != T(1)), "" );
44 static_assert ( !(o3 != T(2)), "" );
45 static_assert ( !(o3 != val), "" );
47 static_assert ( (T(1) != o1), "" );
48 static_assert ( !(T(1) != o2), "" );
49 static_assert ( (T(1) != o3), "" );
50 static_assert ( !(T(2) != o3), "" );
51 static_assert ( !(val != o3), "" );