Re: is it possible to have functions with 0, 1, or 2 args?

ram@zedat.fu-berlin.de (Stefan Ram) writes:

Mark Summerfield <mark@qtrac.eu> wrote or quoted:
>

This does *not* work for the `va_test()` call.  But if I supply 1 or 2 args
it works great.

>
  Here's an
>
SSCCE, a short self-contained correct compilable example, aka,
MWE - minimal working example.
>
  Some coders whip up these examples themselves for their post!
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  It's a quick and dirty demo that can be compiled and run to
  show what's buggin' them.
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  In this case, it's hella clear the macros are trippin', thinkin'
  the number of args is "1" when it's actually zilch, nada, zero.
>
  main.c
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#include <stdio.h>
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#define NARGS(...)  NARGS_(__VA_ARGS__, 5, 4, 3, 2, 1, 0)
#define NARGS_(_5, _4, _3, _2, _1, N, ...)  N
#define va_test(...)  NARGS(__VA_ARGS__)
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int main( void ){ printf( "%d\n", va_test() ); }
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  transcript
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1

It appears you have missed the point of the question.  What is being
sought is a way to distinguish between macro calls like va_test()
and macro calls like va_test(x).  The above definition of va_test()
doesn't do that.