From: eregontp@...
Date: 2019-01-10T09:16:00+00:00
Subject: [ruby-core:90984] [Ruby trunk Feature#6470][Open] Make attr_accessor return the list of generated method

Issue #6470 has been updated by Eregon (Benoit Daloze).

Status changed from Rejected to Open

@matz There are use cases, see https://bugs.ruby-lang.org/issues/11539 and https://bugs.ruby-lang.org/issues/11541.

Also, one case which has been IIRC frequently requested (mentioned just above in this issue, https://bugs.ruby-lang.org/issues/6470#note-4) is:

```ruby
attr_reader :foo
private attr_writer :foo
```

So one can use the symmetric `foo` and `foo=` in the class, but only the getter would be public.
This is also useful to evolve `foo=` (e.g., to invalidate some caches if set) and add extra logic in it, without having to change all places from `@foo =` to `self.foo =`.

I reopen because I think not all relevant issues have been considered.

In general, I support this feature as it is a general and composable extension which enables many more things such as for `def` (decorators, debugging, concurrency, etc).

----------------------------------------
Feature #6470: Make attr_accessor return the list of generated method
https://bugs.ruby-lang.org/issues/6470#change-76201

* Author: rupert (Robert Pankowecki)
* Status: Open
* Priority: Normal
* Assignee: matz (Yukihiro Matsumoto)
* Target version: 
----------------------------------------
attr_accesor currently returns nil. It would be more helpful if it return list of generated methods so that it can become an argument to other methods like :private or :protected. That way private accessors can still be defined at top of the class and be private without changing the visibility of next methods. 

class Something
  private *attr_accessor :user, :action # IMHO This is nice
  # private attr_accessor :user, :action # <-- would be even better if :private method accepted arrays

  def initialize(user, action)
    self.user   = user
    self.action = action
  end

  def public_method
    user.do_something(action)
  end
end


VS


class Something
  private; attr_accessor :user, :action; public # IMHO Hack!!

  def initialize(user, action)
    self.user   = user
    self.action = action
  end

  def public_method
    user.do_something(action)
  end
end


VS


class Something
  def initialize(user, action)
    self.user   = user
    self.action = action
  end

  def public_method
    user.do_something(action)
  end

  private
  attr_accessor :user, :action # IMHO Does not look nice at bottom of the class definition
end



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