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 // [optional.optional], class template optional 12 using std::optional; 13 14 // [optional.nullopt], no-value state indicator 15 using std::nullopt; 16 using std::nullopt_t; 17 18 // [optional.bad.access], class bad_optional_access 19 using std::bad_optional_access; 20 21 // [optional.relops], relational operators 22 using std::operator==; 23 using std::operator!=; 24 using std::operator<; 25 using std::operator>; 26 using std::operator<=; 27 using std::operator>=; 28 using std::operator<=>; 29 30 // [optional.specalg], specialized algorithms 31 using std::swap; 32 33 using std::make_optional; 34 35 // [optional.hash], hash support 36 using std::hash; 37} // namespace std 38