From: Eric Hodel <drbrain@...7.net>
Date: 2006-04-10T15:18:37+09:00
Subject: Re: Ruby Grammar - "do"


On Apr 9, 2006, at 11:06 PM, Bihal wrote:

> Hey everyone
>
> I work for a software development company that is currently writing an
> in-house grammar for parsing Ruby. I've been frustrated by it many,
> many, many times. Maybe it's easy to program in, but it's a  
> nightmare to
> parse.

This list may help you:

http://rubyforge.org/mailman/listinfo/rubygrammar-grammarians

> My particular question (right now :P) is in reference to the do  
> keyword.
> I was sure that if there was a "do" eg.
>
> expression.each do | [
>             name
>             ]+
>              |
>   body
> end
>
> there would be an "end". But now I've run into this particular  
> example.

Every do has an end in your example.

> def _tags
>    rv = [
[...]
>    ].delete_if do |x|
                  ^^
>       send(x).nil?
>    end.collect do |elem|
      ^^^         ^^
>       [nil, elem]
>    end
      ^^^
>
>    @item.each do
                 ^^
>       rv << [nil, "item"]
>    end
      ^^^
>    rv
> end

This is def's end.

PS: Whoever wrote that example code should be taken out for parking- 
lot therapy.

-- 
Eric Hodel - drbrain@segment7.net - http://blog.segment7.net
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