libcxx/include/stddef.h

   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
  10 /*
  11     stddef.h synopsis
  12
  13 Macros:
  14
  15     offsetof(type,member-designator)
  16     NULL
  17
  18 Types:
  19
  20     ptrdiff_t
  21     size_t
  22     max_align_t // C++11
  23     nullptr_t
  24
  25 */
  26
  27 #include <__config>
  28
  29 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  30 #  pragma GCC system_header
  31 #endif
  32
  33 // Note: This include is outside of header guards because we sometimes get included multiple times
  34 //       with different defines and the underlying <stddef.h> will know how to deal with that.
  35 #include_next <stddef.h>
  36
  37 #ifndef _LIBCPP_STDDEF_H
  38 #  define _LIBCPP_STDDEF_H
  39
  40 #  ifdef __cplusplus
  41 typedef decltype(nullptr) nullptr_t;
  42 #  endif
  43
  44 #endif // _LIBCPP_STDDEF_H