#ifndef  NARG_MACRO_H
#define  NARG_MACRO_H

#define ARG_N( \
          _1,  _2,  _3,  _4,  _5,  _6,  _7,  _8,  _9, _10, \
         _11, _12, _13, _14, _15, _16, _17, _18, _19, _20, \
         _21, _22, _23, _24, _25, _26, _27, _28, _29, _30, \
         _31, _32, _33, _34, _35, _36, _37, _38, _39, _40, \
         _41, _42, _43, _44, _45, _46, _47, _48, _49, _50, \
         _51, _52, _53, _54, _55, _56, _57, _58, _59, _60, \
         _61, _62, _63, N, ...) N
 
#define RSEQ_N()                                        \
         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

#define RSEQ_N_2()                                        \
         1, 1, 1, 1,                                   \
         1, 1, 1, 1, 1, 1, 1, 1, 1, 1,           \
         1, 1, 1, 1, 1, 1, 1, 1, 1, 1,           \
         1, 1, 1, 1, 1, 1, 1, 1, 1, 1,           \
         1, 1, 1, 1, 1, 1, 1, 1, 1, 1,           \
         1, 1, 1, 1, 1, 1, 1, 1, 1, 1,           \
         1, 1, 1, 1, 1, 1, 1, 1, 1, 0
 
#define NARG_(...)    ARG_N(__VA_ARGS__)    
 
#define COMMASEQ_N()                                    \
          1,  1,  1,  1,                                   \
          1,  1,  1,  1,  1,  1,  1,  1,  1,  1,           \
          1,  1,  1,  1,  1,  1,  1,  1,  1,  1,           \
          1,  1,  1,  1,  1,  1,  1,  1,  1,  1,           \
          1,  1,  1,  1,  1,  1,  1,  1,  1,  1,           \
          1,  1,  1,  1,  1,  1,  1,  1,  1,  1,           \
          1,  1,  1,  1,  1,  1,  1,  1,  0,  0
 
#define COMMA(...)    ,
 
#define HASCOMMA(...)                                   \
          NARG_(__VA_ARGS__, COMMASEQ_N())
 
#define NARG(...)                                       \
          NARG_HELPER1(                                 \
              HASCOMMA(__VA_ARGS__),                    \
              HASCOMMA(COMMA __VA_ARGS__ ()),        \
              NARG_(__VA_ARGS__, RSEQ_N()))

#define NARG_2(...)                                       \
          NARG_HELPER1(                                 \
              HASCOMMA(__VA_ARGS__),                    \
              HASCOMMA(COMMA __VA_ARGS__ ()),        \
              NARG_(__VA_ARGS__, RSEQ_N_2()))
 
 
#define NARG_HELPER1(a, b, N)    NARG_HELPER2(a, b, N)
#define NARG_HELPER2(a, b, N)    NARG_HELPER3_ ## a ## b(N)
#define NARG_HELPER3_01(N)    0
#define NARG_HELPER3_00(N)    1
#define NARG_HELPER3_11(N)    N


#define COMBINE_EXPANDED(A, B) A ## B
#define COMBINE(A, B) COMBINE_EXPANDED(A,B)

#endif //NARG_MACRO_H