1 // -*- C++ -*-
2 //===--------------------------- stddef.h ---------------------------------===//
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
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 #include_next <stddef.h>
46 
47 #ifdef __cplusplus
48 
49 extern "C++" {
50 #include <__nullptr>
51 using std::nullptr_t;
52 }
53 
54 // Re-use the compiler's <stddef.h> max_align_t where possible.
55 #if !defined(__CLANG_MAX_ALIGN_T_DEFINED) && !defined(_GCC_MAX_ALIGN_T) && \
56     !defined(__DEFINED_max_align_t) && !defined(__NetBSD__)
57 typedef long double max_align_t;
58 #endif
59 
60 #endif
61 
62 #endif  // _LIBCPP_STDDEF_H
63