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1// -*- C++ -*-2//===----------------------------------------------------------------------===//3//4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.5// See https://llvm.org/LICENSE.txt for license information.6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception7//8//===----------------------------------------------------------------------===//9#ifndef _LIBCPP___EXPECTED_UNEXPECT_H10#define _LIBCPP___EXPECTED_UNEXPECT_H11 12#include <__config>13 14#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)15# pragma GCC system_header16#endif17 18#if _LIBCPP_STD_VER >= 2319 20_LIBCPP_BEGIN_NAMESPACE_STD21 22struct unexpect_t {23 explicit unexpect_t() = default;24};25 26inline constexpr unexpect_t unexpect{};27 28_LIBCPP_END_NAMESPACE_STD29 30#endif // _LIBCPP_STD_VER >= 2331 32#endif // _LIBCPP___EXPECTED_UNEXPECT_H33