a90c6dd460
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@224658 91177308-0d34-0410-b5e6-96231b3b80d8
59 lines
1.4 KiB
C++
59 lines
1.4 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <optional>
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// template <class T> constexpr bool operator!=(const optional<T>& x, const T& v);
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// template <class T> constexpr bool operator!=(const T& v, const optional<T>& x);
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#include <experimental/optional>
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#if _LIBCPP_STD_VER > 11
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using std::experimental::optional;
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struct X
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{
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int i_;
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constexpr X(int i) : i_(i) {}
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};
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constexpr bool operator == ( const X &lhs, const X &rhs )
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{ return lhs.i_ == rhs.i_ ; }
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#endif
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int main()
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{
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#if _LIBCPP_STD_VER > 11
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{
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typedef X T;
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typedef optional<T> O;
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constexpr T val(2);
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constexpr O o1; // disengaged
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constexpr O o2{1}; // engaged
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constexpr O o3{val}; // engaged
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static_assert ( (o1 != T(1)), "" );
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static_assert ( !(o2 != T(1)), "" );
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static_assert ( (o3 != T(1)), "" );
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static_assert ( !(o3 != T(2)), "" );
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static_assert ( !(o3 != val), "" );
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static_assert ( (T(1) != o1), "" );
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static_assert ( !(T(1) != o2), "" );
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static_assert ( (T(1) != o3), "" );
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static_assert ( !(T(2) != o3), "" );
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static_assert ( !(val != o3), "" );
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}
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#endif
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}
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