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#ifndef _LIBCPP_CSTDALIGN
11#define _LIBCPP_CSTDALIGN
12
13/*
14    cstdalign synopsis
15
16Macros:
17
18    __alignas_is_defined
19    __alignof_is_defined
20
21*/
22
23#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
24#  include <__cxx03/__config>
25#else
26#  include <__config>
27
28// <stdalign.h> is not provided by libc++
29#  if __has_include(<stdalign.h>)
30#    include <stdalign.h>
31#    ifdef _LIBCPP_STDALIGN_H
32#      error "If libc++ starts defining <stdalign.h>, the __has_include check should move to libc++'s <stdalign.h>"
33#    endif
34#  endif
35
36#  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
37#    pragma GCC system_header
38#  endif
39
40#  undef __alignas_is_defined
41#  define __alignas_is_defined 1
42
43#  undef __alignof_is_defined
44#  define __alignof_is_defined 1
45
46#  if _LIBCPP_STD_VER >= 20
47
48using __standard_header_cstdalign _LIBCPP_DEPRECATED_("removed in C++20.") _LIBCPP_NODEBUG = void;
49using __use_standard_header_cstdalign _LIBCPP_NODEBUG = __standard_header_cstdalign;
50
51#  elif _LIBCPP_STD_VER >= 17
52
53using __standard_header_cstdalign _LIBCPP_DEPRECATED _LIBCPP_NODEBUG = void;
54using __use_standard_header_cstdalign _LIBCPP_NODEBUG                = __standard_header_cstdalign;
55
56#  endif
57#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
58
59#endif // _LIBCPP_CSTDALIGN