/* A C macro for declaring that a function does not return.

   Copyright (C) 2011-2020 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify it

   under the terms of the GNU General Public License as published

   by the Free Software Foundation; either version 3 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */

#ifndef _Noreturn

# if (defined __cplusplus \

      && ((201103 <= __cplusplus && !(__GNUC__ == 4 && __GNUC_MINOR__ == 7)) \

          || (defined _MSC_VER && 1900 <= _MSC_VER)) \

      && 0)

    /* [[noreturn]] is not practically usable, because with it the syntax

         extern _Noreturn void func (...);

       would not be valid; such a declaration would only be valid with 'extern'

       and '_Noreturn' swapped, or without the 'extern' keyword.  However, some

       AIX system header files and several gnulib header files use precisely

       this syntax with 'extern'.  */

#  define _Noreturn [[noreturn]]

# elif ((!defined __cplusplus || defined __clang__)                     \

        && (201112 <= (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0)  \

            || 4 < __GNUC__ + (7 <= __GNUC_MINOR__) \

            || (defined __apple_build_version__ \

                ? 6000000 <= __apple_build_version__ \

                : 3 < __clang_major__ + (5 <= __clang_minor__))))

   /* _Noreturn works as-is.  */

# elif 2 < __GNUC__ + (8 <= __GNUC_MINOR__) || 0x5110 <= __SUNPRO_C

#  define _Noreturn __attribute__ ((__noreturn__))

# elif 1200 <= (defined _MSC_VER ? _MSC_VER : 0)

#  define _Noreturn __declspec (noreturn)

# else

#  define _Noreturn

# endif

#endif