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-exception 7// 8//===----------------------------------------------------------------------===// 9 10export namespace std { 11#if _LIBCPP_STD_VER >= 23 12 // [expected.unexpected], class template unexpected 13 using std::unexpected; 14 15 // [expected.bad], class template bad_expected_access 16 using std::bad_expected_access; 17 18 // in-place construction of unexpected values 19 using std::unexpect; 20 using std::unexpect_t; 21 22 // [expected.expected], class template expected 23 using std::expected; 24#endif // _LIBCPP_STD_VER >= 23 25} // namespace std 26