1275970Scy/* A substitute for ISO C11 <stdnoreturn.h>.
2275970Scy
3285169Scy   Copyright 2012-2015 Free Software Foundation, Inc.
4275970Scy
5275970Scy   This program is free software; you can redistribute it and/or modify
6275970Scy   it under the terms of the GNU Lesser General Public License as published by
7275970Scy   the Free Software Foundation; either version 2.1, or (at your option)
8275970Scy   any later version.
9275970Scy
10275970Scy   This program is distributed in the hope that it will be useful,
11275970Scy   but WITHOUT ANY WARRANTY; without even the implied warranty of
12275970Scy   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13275970Scy   GNU Lesser General Public License for more details.
14275970Scy
15275970Scy   You should have received a copy of the GNU Lesser General Public License
16275970Scy   along with this program; if not, see <http://www.gnu.org/licenses/>.  */
17275970Scy
18275970Scy/* Written by Paul Eggert.  */
19275970Scy
20275970Scy#ifndef noreturn
21275970Scy
22275970Scy/* ISO C11 <stdnoreturn.h> for platforms that lack it.
23275970Scy
24275970Scy   References:
25275970Scy   ISO C11 (latest free draft
26275970Scy   <http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1570.pdf>)
27275970Scy   section 7.23 */
28275970Scy
29275970Scy/* The definition of _Noreturn is copied here.  */
30275970Scy
31275970Scy#if 1200 <= _MSC_VER
32275970Scy/* Standard include files on this platform contain declarations like
33275970Scy   "__declspec (noreturn) void abort (void);".  "#define noreturn
34275970Scy   _Noreturn" would cause this declaration to be rewritten to the
35275970Scy   invalid "__declspec (__declspec (noreturn)) void abort (void);".
36275970Scy   Instead, define noreturn to empty, so that such declarations are
37275970Scy   rewritten to "__declspec () void abort (void);", which is
38275970Scy   equivalent to "void abort (void);"; this gives up on noreturn's
39275970Scy   advice to the compiler but at least it is valid code.  */
40275970Scy# define noreturn /*empty*/
41275970Scy#else
42275970Scy# define noreturn _Noreturn
43275970Scy#endif
44275970Scy
45275970Scy/* Did he ever return?
46275970Scy   No he never returned
47275970Scy   And his fate is still unlearn'd ...
48275970Scy     -- Steiner J, Hawes BL.  M.T.A. (1949)  */
49275970Scy
50275970Scy#endif /* noreturn */
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