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freebsd-dev/include/stdnoreturn.h

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Add <stdalign.h> and <stdnoreturn.h>. Even though these header files make little sense to me, they are part of the standard. By including these header files, you can simply use `alignas', `alignof' and `noreturn' instead of the underscore-prefixed versions.
2011-12-25 20:51:40 +00:00
/*-
include: General further adoption of SPDX licensing ID tags. Mainly focus on files that use BSD 2-Clause license, however the tool I was using mis-identified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
2017-11-25 17:09:43 +00:00
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
Add <stdalign.h> and <stdnoreturn.h>. Even though these header files make little sense to me, they are part of the standard. By including these header files, you can simply use `alignas', `alignof' and `noreturn' instead of the underscore-prefixed versions.
2011-12-25 20:51:40 +00:00
* Copyright (c) 2012 Ed Schouten <ed@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
Simply disallow <stdnoreturn.h> to be used in combination with C++. There is no way one could possibly use this header file in combination with C++ code. The problem is that in C11 the `noreturn' macro expands to the `_Noreturn' function specifier, while in C++11 the `noreturn' keyword is an attribute. So in C11 you have to write: noreturn void exit(int status); While in C++11 you have to write: [[noreturn]] void exit(int status); It is impossible to #define noreturn for C++ in such a way that it allows both conventions. By intentionally breaking this header this way, we prevent people from using this header in their C++<11 sources.
2012-01-03 23:05:23 +00:00
#ifdef __cplusplus
#error "<stdnoreturn.h> cannot be used in combination with C++11."
#endif
Add <stdalign.h> and <stdnoreturn.h>. Even though these header files make little sense to me, they are part of the standard. By including these header files, you can simply use `alignas', `alignof' and `noreturn' instead of the underscore-prefixed versions.
2011-12-25 20:51:40 +00:00
#ifndef noreturn
#include <sys/cdefs.h>
#define noreturn _Noreturn
#endif /* !noreturn */
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