There are a number of reasons I use them, but the most obv= ious is that a misspelled accessor method will raise NoMethod error, wherea= s a misspelled @ivar reference will silently return nil.

On Mon, Feb 3= , 2014 at 1:44 PM, <sawadatsuyoshi@gmail.com> wrote:=

Issue #9453 has been updated by Tsuyoshi Sawada.

What is the point of defining a private accessor method? You can directly r= efer to the instance variables without using accessors.

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Feature #9453: Return symbols of defined methods for `attr` and friends

https://bugs.ruby-lang.org/issues/9453#change-44898

* Author: Joshua Ballanco
* Status: Open
* Priority: Normal
* Assignee:
* Category: core
* Target version:
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With Ruby 2.1 returning a symbol from `def` and `define_method`, that leave= s `attr`, `attr_reader`, `attr_writer`, and `attr_accessor` as ways to defi= ne methods that still return nil. This is unfortunate, because it prevents = the use of method decorators developed to work with `def` from also working= with the `attr*` methods. Because these mechanisms can define more than on= e method, the return values would need to be arrays of symbols.

For an example of how this could be useful in real-world code, consider thi= s sample from James Edward Gray II's Warehouse Keeper example (https://git= hub.com/JEG2/warehouse_keeper):

=A0 =A0 attr_reader :images, :key_map, :window, :screen_manager, :animation= s
=A0 =A0 private =A0 =A0 :images, :key_map, :window, :screen_manager, :anima= tions

if `attr_reader` returned symbols, then this could be simplified to:

=A0 =A0 private *attr_reader(:images, :key_map, :window, :screen_manager, := animations)

I've attached a patch that implements this change and includes a few te= sts. For those who use git, I've also submitted this as a pull request = here: h= ttps://github.com/ruby/ruby/pull/517

---Files--------------------------------
attr_rv.patch (3.23 KB)

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http://bugs.ruby-l= ang.org/

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http://avdi.org=

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