/*
 *   ORXONOX - the hottest 3D action shooter ever to exist
 *                    > www.orxonox.net <
 *
 *
 *   License notice:
 *
 *   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 2
 *   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, write to the Free Software
 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 *   Author:
 *      Fabian 'x3n' Landau
 *   Co-authors:
 *      ...
 *
 */

/**
    @file
    @brief Declaration of the ORXONOX_VA_NARGS macro which returns the number of arguments passed to a variadic macro.
*/

#include <boost/preprocessor/facilities/expand.hpp>

/**
    @brief Returns the number of arguments passed to a variadic macro. Important: The number of arguments must be greater than zero (ORXONOX_VA_NARGS() returns 1).
*/
#define ORXONOX_VA_NARGS(...) \
    ORXONOX_VA_NARGS_CONCAT(__VA_ARGS__, ORXONOX_VA_NARGS_NUMBERS)


// some helper macros //

#define ORXONOX_VA_NARGS_CONCAT(...) \
    BOOST_PP_EXPAND(ORXONOX_VA_NARGS_INTERN(__VA_ARGS__))

#define ORXONOX_VA_NARGS_INTERN( \
    arg1,  arg2,  arg3,  arg4,  arg5,  arg6,  arg7,  arg8,  arg9,  arg10, \
    arg11, arg12, arg13, arg14, arg15, arg16, arg17, arg18, arg19, arg20, \
    arg21, arg22, arg23, arg24, arg25, arg26, arg27, arg28, arg29, arg30, \
    arg31, arg32, arg33, arg34, arg35, arg36, arg37, arg38, arg39, arg40, \
    arg41, arg42, arg43, arg44, arg45, arg46, arg47, arg48, arg49, arg50, \
    arg51, arg52, arg53, arg54, arg55, arg56, arg57, arg58, arg59, arg60, \
    arg61, arg62, arg63, argn, ...) argn

#define ORXONOX_VA_NARGS_NUMBERS \
    63, 62, 61, 60, 59, 58, 57, 56, 55, 54, 53, 52, 51, 50, 49, 48, \
    47, 46, 45, 44, 43, 42, 41, 40, 39, 38, 37, 36, 35, 34, 33, 32, \
    31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, \
    15, 14, 13, 12, 11, 10,  9,  8,  7,  6,  5,  4,  3,  2,  1,  0