[ruby-core:58714] [ruby-trunk - Feature #9185][Open] Add alias_class_method or class_alias functionality

Issue #9185 has been reported by shevegen (markus heiler).

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Feature #9185: Add alias_class_method or class_alias functionality
https://bugs.ruby-lang.org/issues/9185

Author: shevegen (markus heiler)
Status: Open
Priority: Low
Assignee: 
Category: 
Target version: current: 2.1.0


Hi core team,

First drink a Calpis (カルピス Karupisu) before reading on :-)

Now, my proposal is to add a slight new feature that is mostly one of convenience.

We have two ways to use aliases:

(1) alias
(2) alias_method

But are similar but not 100% the same.

Now this works all fine and nice.

But how to define a class method? Well, simple:

  class Foo; def self.hi; puts 'hi'; end; end; Foo.hi

But how can we make an alias to this class method?

Well, this is ugly - here is one way:

  class Foo; class << self; def ho; hi; end;end;end

Is this readable to you?

Using alias would be more readable.

Ok, we can simplify it by using alias:

  class Foo; class << self; alias ho hi; end;end

But I don't like the class << self there, just to make
a single class alias.

I thus propose a new method called:

class_alias

The above could then be rewritte like so perhaps:
  class Foo; class_alias :ho, :hi; end # I guess this would be more akin to alias_method

If the name is bad, it could be:

  alias_class_method

Perhaps. Anyway, the name is not so important, I am sure a good name can be found,
but I wonder if this would be a good feature to add or not.

Thanks for reading!


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