Suppose that I want to make a new function in povray which takes two
integer parameters, the second one being optional, ie you could call it with
either one or two parameters (eg. "thefunction(1)" or "thefunction(1,2)").
  How do I parse this? I just don't get it.

  I have tried something like this to parse the second parameter:

    Parse_Comma();
    EXPECT
      CASE (FLOAT_FUNCT_TOKEN)
        SecondParam = (int)Token.Token_Float;
        EXIT
      END_CASE

      OTHERWISE
        UNGET
        EXIT
      END_CASE
    END_EXPECT

which works if I call it with a number as the second parameter (eg.
"thefunction(1,2)"), but if I call it, for example, with
"thefunction(1,false)", the SecondParam above gets the value '2'.


-- 
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):_;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/

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