|  | //===---------------------------------------------------------------------===// | 
|  | // | 
|  | // 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 | 
|  | // | 
|  | //===---------------------------------------------------------------------===// | 
|  |  | 
|  | #ifndef _LIBCPP___CSTDDEF_PTRDIFF_T_H | 
|  | #define _LIBCPP___CSTDDEF_PTRDIFF_T_H | 
|  |  | 
|  | #include <__config> | 
|  |  | 
|  | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) | 
|  | #  pragma GCC system_header | 
|  | #endif | 
|  |  | 
|  | _LIBCPP_BEGIN_NAMESPACE_STD | 
|  |  | 
|  | using ptrdiff_t = decltype(static_cast<int*>(nullptr) - static_cast<int*>(nullptr)); | 
|  |  | 
|  | _LIBCPP_END_NAMESPACE_STD | 
|  |  | 
|  | #endif // _LIBCPP___CSTDDEF_PTRDIFF_T_H |