From: Michael Edgar <adgar@...>
Date: 2011-04-20T03:51:09+09:00
Subject: Re: anonymous closures with Proc,new, lambda and ->

Interesting. The default allocation behavior method is removed, and Class.new is overridden, which uses custom allocation and forwards arguments to #initialize - just like normal Class.new. Except Proc doesn't implement #initialize, so it bubbles up to Object#initialize. Since Object#initialize just takes any number of arguments and ignores them, providing an argument to Proc.new doesn't raise.

It seems adding an empty, 0-arg #initialize method to Proc doesn't really lose anything here, and would catch mistakes. The only tiny downside would be a miniscule slow down on explicit calls to Proc.new... which I think most Rubyists can live with.

Michael Edgar
adgar@carboni.ca
http://carboni.ca/

On Apr 19, 2011, at 2:26 PM, Steve Klabnik wrote:

> Doesn't look like it's really used for anything:
> https://github.com/ruby/ruby/blob/trunk/proc.c#L448