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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#include <__config>
24
25// <stdalign.h> is not provided by libc++
26#if __has_include(<stdalign.h>)
27#  include <stdalign.h>
28#  ifdef _LIBCPP_STDALIGN_H
29#    error "If libc++ starts defining <stdalign.h>, the __has_include check should move to libc++'s <stdalign.h>"
30#  endif
31#endif
32
33#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
34#  pragma GCC system_header
35#endif
36
37#undef __alignas_is_defined
38#define __alignas_is_defined 1
39
40#undef __alignof_is_defined
41#define __alignof_is_defined 1
42
43#if _LIBCPP_STD_VER >= 20
44
45using __standard_header_cstdalign _LIBCPP_DEPRECATED_("removed in C++20.") = void;
46using __use_standard_header_cstdalign                                      = __standard_header_cstdalign;
47
48#elif _LIBCPP_STD_VER >= 17
49
50using __standard_header_cstdalign _LIBCPP_DEPRECATED = void;
51using __use_standard_header_cstdalign                = __standard_header_cstdalign;
52
53#endif
54
55#endif // _LIBCPP_CSTDALIGN
56