From: Ralph Corderoy <redmine@...>
Date: 2011-07-23T00:49:19+09:00
Subject: [ruby-core:38401] [Ruby 1.9 - Feature #5054] Compress a sequence of ends


Issue #5054 has been updated by Ralph Corderoy.


Kurtis Rainbolt-Greene wrote:
> The `endwhile` and `endif` or `fi` solutions aren't *solutions* because they can't be used for block arguments for methods:

(Not "fi", please, awful!  :-)

You're correct.  It can't.  Although there would still seem to be many occasions when they are
useful and would save many "end"s.  Other than labelling the first method call and having an
"endlabel A" as mentioned above I can't see any obvious way to improve that.  An "endall"
might be useful some of the time, but would be more descriptive as "endmodule" or whatever
is needed at that point.  Often, you'd want to "end" lots of things but not all of them.
----------------------------------------
Feature #5054: Compress a sequence of ends
http://redmine.ruby-lang.org/issues/5054

Author: Yasushi ANDO
Status: Assigned
Priority: Normal
Assignee: Yasushi ANDO
Category: Joke
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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