From: Kenta Murata <muraken@...>
Date: 2011-07-19T23:27:39+09:00
Subject: [ruby-core:38194] [Ruby 1.9 - Feature #5054] Compress a sequence of ends


Issue #5054 has been updated by Kenta Murata.


I feel the proposed syntax including e+nd by ko1 is ugly, as nested end chains are so.
They tell us the code must be made refactoring avoiding use them.
So, we can expect well-trained people avoid using them.

BTW, the proposed syntax reduces the height of code.
I like this advantage.  I want to merge this.

----------------------------------------
Feature #5054: Compress a sequence of ends
http://redmine.ruby-lang.org/issues/5054

Author: ANDO Yasushi ANDO
Status: Open
Priority: Normal
Assignee: 
Category: 
Target version: 


Though as matz said at rubykaigi2011 ruby is a quite good language, many people hate a long sequence of `end' like this:

module MyModule
  class MyClass
    def my_method
      10.times do
        if rand < 0.5 
          p :small
        end 
      end 
    end 
  end 
end

So, I'd like to propose introducing a special keyword, en(n+)d. Using this keyword, we can rewrite the above example like this:

module MyModule
  class MyClass
    def my_method
      10.times do
        if rand < 0.5 
          p :small
        ennnnnd 

I know matz's already rejected a python-style block. He wrote:

> it works badly with
>   * tab/space mixture
>   * templates, e.g. eRuby
>   * expression with code chunk, e.g lambdas and blocks
http://www.ruby-forum.com/topic/108457

These bad things won't occur by introducing en(n+)d.

Some implementations already exists.

JRuby
- https://gist.github.com/1088363

CRuby
- http://www.atdot.net/sp/raw/kn9iol
- http://d.hatena.ne.jp/ku-ma-me/20110718/p1

Thanks for your consideration.


-- 
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