From: Benoit Daloze <redmine@...>
Date: 2010-03-24T07:03:47+09:00
Subject: [ruby-core:28911] [Feature #1961] Kernel#__dir__

Issue #1961 has been updated by Benoit Daloze.


> (1) add a toplevel constant __DIR__
> pros: looks like __FILE__
> cons: adding new keyword
>
> (2) add Kernel#__DIR__
> pros: no new keyword
> cons: it should have a lower-case name (like 1.9's __method__),
> because it is not a constant but a method.
>
> (3) add Kernel#__dir__
> pros: no new keyword, and it is clearer than (4) that it has
> some associations with __FILE__.
> cons: lacking consistency for __FILE__
>
> (4) make __FILE__ to the default argument of File.dirname
> pros: no new keyword nor new method
> cons: it is not clear that 'File.dirname' is expanded to
> the path of directory of __FILE__.


+1 for (1) and (3)
I first felt that __DIR__ is more "natural" to me (because the script directory is something constant).
After a bit thinking, (3) looks fine too (to remember we are calling a function).
I think (2) is a bad mix and (4) does not really improve File.dirname(__FILE__)

B.D.
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http://redmine.ruby-lang.org/issues/show/1961

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