VariadicMacro.h

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/*
 * Copyright (C) 2017 by
 *   MetraLabs GmbH (MLAB), GERMANY
 * and
 *   Neuroinformatics and Cognitive Robotics Labs (NICR) at TU Ilmenau, GERMANY
 * All rights reserved.
 *
 * Contact: info@mira-project.org
 *
 * Commercial Usage:
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 *   accordance with the commercial license agreement provided with the
 *   software or, alternatively, in accordance with the terms contained in
 *   a written agreement between you and MLAB or NICR.
 *
 * GNU General Public License Usage:
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 *   General Public License version 3.0 as published by the Free Software
 *   Foundation and appearing in the file LICENSE.GPL3 included in the
 *   packaging of this file. Please review the following information to
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 */

#ifndef _MIRA_VARIADICMACRO_H_
#define _MIRA_VARIADICMACRO_H_

#include <boost/version.hpp>

#if BOOST_VERSION >= 104900
#include <boost/preprocessor/variadic/size.hpp>
#endif


#ifdef BOOST_PP_VARIADICS
    #if BOOST_PP_VARIADICS
        #define MIRA_VARIADIC_SIZE BOOST_PP_VARIADIC_SIZE
    #endif
#endif


#ifndef MIRA_VARIADIC_SIZE

    #define GET_0(...) "__________ Error: Variable argument ('...') needs at least one parameter! __________"
    #define GET_1(i1, ...) i1
    #define GET_2(i1, i2, ...) i2
    #define GET_3(i1, i2, i3, ...) i3
    #define GET_4(i1, i2, i3, i4, ...) i4
    #define GET_5(i1, i2, i3, i4, i5, ...) i5
    #define GET_6(i1, i2, i3, i4, i5, i6, ...) i6
    #define GET_7(i1, i2, i3, i4, i5, i6, i7, ...) i7
    #define GET_8(i1, i2, i3, i4, i5, i6, i7, i8, ...) i8
    #define GET_9(i1, i2, i3, i4, i5, i6, i7, i8, i9, ...) i9
    #define GET_10(i1, i2, i3, i4, i5, i6, i7, i8, i9, i10, ...) i10
    #define GET_11(i1, i2, i3, i4, i5, i6, i7, i8, i9, i10, i11, ...) i11
    #define GET_12(i1, i2, i3, i4, i5, i6, i7, i8, i9, i10, i11, i12, ...) i12
    #define GET_13(i1, i2, i3, i4, i5, i6, i7, i8, i9, i10, i11, i12, i13, ...) i13
    #define GET_14(i1, i2, i3, i4, i5, i6, i7, i8, i9, i10, i11, i12, i13, i14, ...) i14
    #define GET_15(i1, i2, i3, i4, i5, i6, i7, i8, i9, i10, i11, i12, i13, i14, i15, ...) i15
    #define GET_16(i1, i2, i3, i4, i5, i6, i7, i8, i9, i10, i11, i12, i13, i14, i15, i16, ...) i16
    #define GET_17(i1, i2, i3, i4, i5, i6, i7, i8, i9, i10, i11, i12, i13, i14, i15, i16, i17, ...) i17
    #define GET_18(i1, i2, i3, i4, i5, i6, i7, i8, i9, i10, i11, i12, i13, i14, i15, i16, i17, i18, ...) i18
    #define GET_19(i1, i2, i3, i4, i5, i6, i7, i8, i9, i10, i11, i12, i13, i14, i15, i16, i17, i18, i19, ...) i19
    #define GET_20(i1, i2, i3, i4, i5, i6, i7, i8, i9, i10, i11, i12, i13, i14, i15, i16, i17, i18, i19, i20, ...) i20
    #define GET_21(i1, i2, i3, i4, i5, i6, i7, i8, i9, i10, i11, i12, i13, i14, i15, i16, i17, i18, i19, i20, i21, ...) i21
    #define GET_22(i1, i2, i3, i4, i5, i6, i7, i8, i9, i10, i11, i12, i13, i14, i15, i16, i17, i18, i19, i20, i21, i22, ...) i22
    #define GET_23(i1, i2, i3, i4, i5, i6, i7, i8, i9, i10, i11, i12, i13, i14, i15, i16, i17, i18, i19, i20, i21, i22, i23, ...) i23
    #define GET_24(i1, i2, i3, i4, i5, i6, i7, i8, i9, i10, i11, i12, i13, i14, i15, i16, i17, i18, i19, i20, i21, i22, i23, i24, ...) i24

    #define GET_N(N, ...) GET_##N(__VA_ARGS__)

    #define MIRA_VARIADIC_SIZE(...) GET_N(24, __VA_ARGS__, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
#endif


#endif