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18 #ifndef ION_BASE_ARGCOUNT_H_
19 #define ION_BASE_ARGCOUNT_H_
27 #define ION_ARGCOUNT_EXPAND(x) x
30 #define ION_ARGCOUNT_CONCAT(a, b) a##b
31 #define ION_ARGCOUNT_XCONCAT(a, b) ION_ARGCOUNT_CONCAT(a, b)
33 #define ION_ARGCOUNT(...) \
34 ION_ARGCOUNT_EXPAND(ION_ARGCOUNT_(__VA_ARGS__, ION_ARGCOUNT_RSEQ_N()))
35 #define ION_ARGCOUNT_(...) ION_ARGCOUNT_EXPAND(ION_ARGCOUNTN(__VA_ARGS__))
36 #define ION_ARGCOUNTN( \
37 _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, \
38 _11, _12, _13, _14, _15, _16, _17, _18, _19, _20, \
39 _21, _22, _23, _24, _25, _26, _27, _28, _29, _30, \
40 _31, _32, _33, _34, _35, _36, _37, _38, _39, _40, \
41 _41, _42, _43, _44, _45, _46, _47, _48, _49, _50, \
42 _51, _52, _53, _54, _55, _56, _57, _58, _59, _60, \
43 _61, _62, _63, N, ...) N
44 #define ION_ARGCOUNT_RSEQ_N() \
46 59, 58, 57, 56, 55, 54, 53, 52, 51, 50, \
47 49, 48, 47, 46, 45, 44, 43, 42, 41, 40, \
48 39, 38, 37, 36, 35, 34, 33, 32, 31, 30, \
49 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, \
50 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, \
51 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
53 #endif // ION_BASE_ARGCOUNT_H_
1.8.6 
