a90c6dd460
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@224658 91177308-0d34-0410-b5e6-96231b3b80d8
76 lines
1.9 KiB
C++
76 lines
1.9 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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
|
|
}
|