libcxx/include/__cstddef/ptrdiff_t.h

   1 //===---------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===---------------------------------------------------------------------===//
   8
   9 #ifndef _LIBCPP___CSTDDEF_PTRDIFF_T_H
  10 #define _LIBCPP___CSTDDEF_PTRDIFF_T_H
  11
  12 #include <__config>
  13
  14 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  15 #  pragma GCC system_header
  16 #endif
  17
  18 _LIBCPP_BEGIN_NAMESPACE_STD
  19
  20 using ptrdiff_t = decltype(static_cast<int*>(nullptr) - static_cast<int*>(nullptr));
  21
  22 _LIBCPP_END_NAMESPACE_STD
  23
  24 #endif // _LIBCPP___CSTDDEF_PTRDIFF_T_H