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llvm-project/libcxx/include/stddef.h

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Split <stddef.h> out of <cstddef>. There are a bunch of macros (__need_size_t etc) that request just one piece of <stddef.h>; if any one of these is defined, we just directly include the underlying header. Note that <stddef.h> provides a ::nullptr_t. We don't want that available to includers of <cstddef>, so instead of following the usual pattern where <cfoo> includes <foo.h> then pulls things from :: into std:: with using-declarations, we implement <stddef.h> and <cstddef> separately; both include <__nullptr> for the definition of std::nullptr_t. llvm-svn: 249761
2015-10-09 06:25:27 +08:00
// -*- C++ -*-
//===--------------------------- stddef.h ---------------------------------===//
//
Update more file headers across all of the LLVM projects in the monorepo to reflect the new license. These used slightly different spellings that defeated my regular expressions. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351648
2019-01-19 18:56:40 +08:00
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
Split <stddef.h> out of <cstddef>. There are a bunch of macros (__need_size_t etc) that request just one piece of <stddef.h>; if any one of these is defined, we just directly include the underlying header. Note that <stddef.h> provides a ::nullptr_t. We don't want that available to includers of <cstddef>, so instead of following the usual pattern where <cfoo> includes <foo.h> then pulls things from :: into std:: with using-declarations, we implement <stddef.h> and <cstddef> separately; both include <__nullptr> for the definition of std::nullptr_t. llvm-svn: 249761
2015-10-09 06:25:27 +08:00
//
//===----------------------------------------------------------------------===//
#if defined(__need_ptrdiff_t) || defined(__need_size_t) || \
defined(__need_wchar_t) || defined(__need_NULL) || defined(__need_wint_t)
PR25118: move system_header pragma before uses of include_next to avoid extension warnings for people finding libc++ headers via -I paths. llvm-svn: 249788
2015-10-09 08:26:50 +08:00
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#pragma GCC system_header
#endif
Split <stddef.h> out of <cstddef>. There are a bunch of macros (__need_size_t etc) that request just one piece of <stddef.h>; if any one of these is defined, we just directly include the underlying header. Note that <stddef.h> provides a ::nullptr_t. We don't want that available to includers of <cstddef>, so instead of following the usual pattern where <cfoo> includes <foo.h> then pulls things from :: into std:: with using-declarations, we implement <stddef.h> and <cstddef> separately; both include <__nullptr> for the definition of std::nullptr_t. llvm-svn: 249761
2015-10-09 06:25:27 +08:00
#include_next <stddef.h>
#elif !defined(_LIBCPP_STDDEF_H)
#define _LIBCPP_STDDEF_H
/*
stddef.h synopsis
Macros:
offsetof(type,member-designator)
NULL
Types:
ptrdiff_t
size_t
max_align_t
nullptr_t
*/
#include <__config>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#pragma GCC system_header
#endif
PR25118: move system_header pragma before uses of include_next to avoid extension warnings for people finding libc++ headers via -I paths. llvm-svn: 249788
2015-10-09 08:26:50 +08:00
#include_next <stddef.h>
Split <stddef.h> out of <cstddef>. There are a bunch of macros (__need_size_t etc) that request just one piece of <stddef.h>; if any one of these is defined, we just directly include the underlying header. Note that <stddef.h> provides a ::nullptr_t. We don't want that available to includers of <cstddef>, so instead of following the usual pattern where <cfoo> includes <foo.h> then pulls things from :: into std:: with using-declarations, we implement <stddef.h> and <cstddef> separately; both include <__nullptr> for the definition of std::nullptr_t. llvm-svn: 249761
2015-10-09 06:25:27 +08:00
#ifdef __cplusplus
extern "C++" {
#include <__nullptr>
using std::nullptr_t;
}
// Re-use the compiler's <stddef.h> max_align_t where possible.
Check for musl-libc's max_align_t in addition to other variants. Summary: Libcxx will define its own max_align_t when it is not available. However, the availability checks today only check for Clang's definition and GCC's definition. In particular, it does not check for musl's definition, which is the same as GCC's but guarded with a different macro. Reviewers: mclow.lists, EricWF Reviewed By: EricWF Subscribers: chandlerc, cfe-commits Differential Revision: https://reviews.llvm.org/D28478 llvm-svn: 294683
2017-02-10 09:27:42 +08:00
#if !defined(__CLANG_MAX_ALIGN_T_DEFINED) && !defined(_GCC_MAX_ALIGN_T) && \
Teach libc++ to use native NetBSD's max_align_t Summary: The NetBSD headers ship with max_align_t, that is not compatible with the fallback version in libc++. There is no defined a compiler specific symbol in the headers like: - __CLANG_MAX_ALIGN_T_DEFINED - _GCC_MAX_ALIGN_T - __DEFINED_max_align_t Sponsored by <The NetBSD Foundation> Reviewers: chandlerc, dlj, EricWF, joerg Reviewed By: joerg Subscribers: bsdjhb, llvm-commits, cfe-commits Differential Revision: https://reviews.llvm.org/D47814 llvm-svn: 340224
2018-08-21 06:29:20 +08:00
!defined(__DEFINED_max_align_t) && !defined(__NetBSD__)
Split <stddef.h> out of <cstddef>. There are a bunch of macros (__need_size_t etc) that request just one piece of <stddef.h>; if any one of these is defined, we just directly include the underlying header. Note that <stddef.h> provides a ::nullptr_t. We don't want that available to includers of <cstddef>, so instead of following the usual pattern where <cfoo> includes <foo.h> then pulls things from :: into std:: with using-declarations, we implement <stddef.h> and <cstddef> separately; both include <__nullptr> for the definition of std::nullptr_t. llvm-svn: 249761
2015-10-09 06:25:27 +08:00
typedef long double max_align_t;
#endif
#endif
#endif // _LIBCPP_STDDEF_H