1 // -*- C++ -*-
2 //===--------------------------- stddef.h ---------------------------------===//
3 //
4 //                     The LLVM Compiler Infrastructure
5 //
6 // This file is dual licensed under the MIT and the University of Illinois Open
7 // Source Licenses. See LICENSE.TXT for details.
8 //
9 //===----------------------------------------------------------------------===//
10 
11 #if defined(__need_ptrdiff_t) || defined(__need_size_t) || \
12     defined(__need_wchar_t) || defined(__need_NULL) || defined(__need_wint_t)
13 
14 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
15 #pragma GCC system_header
16 #endif
17 
18 #include_next <stddef.h>
19 
20 #elif !defined(_LIBCPP_STDDEF_H)
21 #define _LIBCPP_STDDEF_H
22 
23 /*
24     stddef.h synopsis
25 
26 Macros:
27 
28     offsetof(type,member-designator)
29     NULL
30 
31 Types:
32 
33     ptrdiff_t
34     size_t
35     max_align_t
36     nullptr_t
37 
38 */
39 
40 #include <__config>
41 
42 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
43 #pragma GCC system_header
44 #endif
45 
46 #include_next <stddef.h>
47 
48 #ifdef __cplusplus
49 
50 extern "C++" {
51 #include <__nullptr>
52 using std::nullptr_t;
53 }
54 
55 // Re-use the compiler's <stddef.h> max_align_t where possible.
56 #if !defined(__CLANG_MAX_ALIGN_T_DEFINED) && !defined(_GCC_MAX_ALIGN_T) && \
57     !defined(__DEFINED_max_align_t) && !defined(__NetBSD__)
58 typedef long double max_align_t;
59 #endif
60 
61 #endif
62 
63 #endif  // _LIBCPP_STDDEF_H
64