For these particular examples, argument counting would be sufficient.

sub pow
{
  shift if @_ > 2;
  return $_[0] ** $_[1];
}

[download]

If the number of arguments is unknown (e.g., sum), I do not know how (and do not believe that it is possible) to determine how the sub was invoked.

Good Day,
    Dean

In reply to Re: Remove bless reference or class/package name from method arguments by duelafn
in thread Remove bless reference or class/package name from method arguments by binf-jw

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