From: Timothy Hunter <TimHunter@...>
Date: 2006-08-28T05:30:00+09:00
Subject: Re: Defining a method with default arguments in C

Brian Takita wrote:
> Hello,
>
> How can I define a default argument value such as the following in c?
>
> def foobar(arg=1)
> end
>
> Thanks,
> Brian Takita
>
Specify the number of arguments as -1 in rb_define_method:

rb_define_method(myclass, "method_name", meth_fnc, -1);

In your method use rb_scan_args to scan the argument list. If you don't 
get enough arguments, use the default values instead.