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 #if defined(__need_ptrdiff_t) || defined(__need_size_t) || \
  11     defined(__need_wchar_t) || defined(__need_NULL) || defined(__need_wint_t)
  12
  13 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  14 #  pragma GCC system_header
  15 #endif
  16
  17 #include_next <stddef.h>
  18
  19 #elif !defined(_LIBCPP_STDDEF_H)
  20 #define _LIBCPP_STDDEF_H
  21
  22 /*
  23     stddef.h synopsis
  24
  25 Macros:
  26
  27     offsetof(type,member-designator)
  28     NULL
  29
  30 Types:
  31
  32     ptrdiff_t
  33     size_t
  34     max_align_t // C++11
  35     nullptr_t
  36
  37 */
  38
  39 #include <__config>
  40
  41 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  42 #  pragma GCC system_header
  43 #endif
  44
  45 #  if __has_include_next(<stddef.h>)
  46 #    include_next <stddef.h>
  47 #  endif
  48
  49 #ifdef __cplusplus
  50     typedef decltype(nullptr) nullptr_t;
  51 #endif
  52
  53 #endif // _LIBCPP_STDDEF_H