From: Logan Capaldo <logancapaldo@...>
Date: 2006-01-18T11:40:02+09:00
Subject: Re: invalid_arity method similar to method missing ?

--Apple-Mail-4-330995758
Content-Transfer-Encoding: 7bit
Content-Type: text/plain;
	charset=US-ASCII;
	delsp=yes;
	format=flowed


On Jan 17, 2006, at 8:30 PM, Didier Prophete wrote:

> The best I can do is get a handle to the 'method' object. Something
> like:
>   meth = self.method(:f1)
>
> But I am stuck there... I would need something like:
>   meth.arg_list
> which would return [ :arg1, :arg2 ], or something like that.

I don't believe there is a way to get the argument names from inside  
ruby. Can you define these methods (f1 and friends) to take a hash  
instead?

eg:
f1(:arg1 => 1, :arg2 => 2)

If you can't do this (you didn't write the functions) perhaps you  
need a more robust abstraction, something like a class called  
Invocation, or Call or something.

eg

class Call
    attr_accessor :target, :method_name, :arguments
    def argument_names
         ... # insert code here to list the names of the arguments
    end
end

Of course you'll still need a way to generate this list. Perhaps with  
RDoc. THis is a little complicated though, ideally you would simply  
have the functions take a hash as its single parameter as I  
mentioned. Still not quite sure what you are asking.
--Apple-Mail-4-330995758--