From: "Florian Groß" <florgro@...>
Date: 2005-08-08T18:19:05+09:00
Subject: Re: new block notation (was: Re: ruby-dev summary 26468-26661)

Yukihiro Matsumoto wrote:

> |Should be okay as long as it isn't used as a method name. The 1.9 () on 
> |local variables change was undone after all, right?
> 
> Right.  But adding a new reserved word makes all programs using that
> word as a local variable invalid.

I'm really not sure if I see the problem with this.

Here's my proposal:

* introduce lambda as a semi-keyword
* if used as "obj.lambda" it is a method call
* if used as "lambda (" or "lambda {" it is a keyword
* else it is a local variable reference

Where "lambda" can also be replaced with "fun", but I think using lambda 
actually makes collisions less likely to happen. (Because somebody might 
have done  def fun(a) puts a end; fun() {}  instead of  self.fun() {})

I think this keeps the risk of incompatibility quite low, but I might be 
overseeing something. Or is the above proposal too hard to implement?