| // -*- C++ -*- | 
 | //===----------------------------------------------------------------------===// | 
 | // | 
 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | 
 | // See https://llvm.org/LICENSE.txt for license information. | 
 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | 
 | // | 
 | //===----------------------------------------------------------------------===// | 
 |  | 
 | export namespace std { | 
 | #if _LIBCPP_HAS_THREADS | 
 |   // [stoptoken], class stop_token | 
 |   using std::stop_token; | 
 |  | 
 |   // [stopsource], class stop_source | 
 |   using std::stop_source; | 
 |  | 
 |   // no-shared-stop-state indicator | 
 |   using std::nostopstate; | 
 |   using std::nostopstate_t; | 
 |  | 
 |   // [stopcallback], class template stop_callback | 
 |   using std::stop_callback; | 
 | #endif // _LIBCPP_HAS_THREADS | 
 | } // namespace std |