From: shannonskipper@...
Date: 2017-05-26T20:33:26+00:00
Subject: [ruby-core:81399] [Ruby trunk Feature#13601] Remove yield_self from Ruby 2.5 (already implemented)

Issue #13601 has been updated by shan (Shannon Skipper).


Note there are differences, for example `42.instance_eval { abs2 } #=> 1764` won't work with Kernel#yield_self and `42.yield_self #=> #<Enumerator: 42:yield_self>` won't work with BasicObject#instance_eval, etc.

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Feature #13601: Remove yield_self from Ruby 2.5 (already implemented)
https://bugs.ruby-lang.org/issues/13601#change-65110

* Author: danielpclark (Daniel P. Clark)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
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Issue https://bugs.ruby-lang.org/issues/6721 for adding `yield_self` is unnecessary as `BasicObject#instance_eval` will do the exact same thing.

~~~ruby
class BasicObject
  alias :yield_self :instance_eval
end

2.yield_self { |x| x*x } # => 4
~~~

I've tried all the examples of its given use cases and `BasicObject#instance_eval` will do them all.

In issue #6721 nobu said he didn't like the name `yield_self`.  I'm in agreement about the name.  Since `BasicObject#instance_eval` will already pipe in `self` and return the value of the block `yield_self` is not necessary.



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