[#55222] [ruby-trunk - Feature #8468][Feedback] Remove $SAFE — "shugo (Shugo Maeda)" <redmine@...>

20 messages 2013/06/01

[#55260] [ruby-trunk - Feature #8478][Open] The hash returned by Enumerable#group_by should have an empty array for its default value — "phiggins (Pete Higgins)" <pete@...>

8 messages 2013/06/02

[#55276] Re: [ruby-changes:28951] zzak:r41003 (trunk): * process.c: Improve Process::exec documentation — Tanaka Akira <akr@...>

2013/5/31 zzak <[email protected]>:

9 messages 2013/06/03

[#55306] [ruby-trunk - Feature #8490][Open] Bring ActiveSupport Enumerable#index_by to core — "rosenfeld (Rodrigo Rosenfeld Rosas)" <rr.rosas@...>

12 messages 2013/06/04

[#55330] [ruby-trunk - Feature #8499][Assigned] Importing Hash#slice, Hash#slice!, Hash#except, and Hash#except! from ActiveSupport — "mrkn (Kenta Murata)" <muraken@...>

30 messages 2013/06/06

[#55391] [ruby-trunk - Bug #8507][Open] Keyword splat does not convert arg to Hash — "stephencelis (Stephen Celis)" <stephen.celis@...>

16 messages 2013/06/09

[#55393] [ruby-trunk - Bug #8508][Open] Invalid byte sequence in UTF-8 (ArgumentError) in win32/registry.rb — "thasmo (Thomas Deinhamer)" <thasmo@...>

11 messages 2013/06/09

[#55528] [ruby-trunk - Bug #8538][Open] c method not pushed into the callstack when called, but popped when returned — deivid (David Rodríguez) <deivid.rodriguez@...>

9 messages 2013/06/17

[#55557] [ruby-trunk - misc #8543][Open] rb_iseq_load — "alvoskov (Alexey Voskov)" <alvoskov@...>

47 messages 2013/06/19

[#55558] [ruby-trunk - Feature #8544][Open] OpenURI should open 'file://' URIs — "silasdavis (Silas Davis)" <ruby-lang@...>

12 messages 2013/06/19

[#55580] [CommonRuby - Feature #8556][Open] MutexedDelegator as a trivial way to make an object thread-safe — "headius (Charles Nutter)" <headius@...>

19 messages 2013/06/21

[#55596] [ruby-trunk - Feature #8563][Open] Instance variable arguments — "sawa (Tsuyoshi Sawada)" <sawadatsuyoshi@...>

18 messages 2013/06/22

[#55638] [CommonRuby - Feature #8568][Open] Introduce RbConfig value for native word size, to avoid Fixnum#size use — "headius (Charles Nutter)" <headius@...>

18 messages 2013/06/24

[#55678] [ruby-trunk - Feature #8572][Open] Fiber should be a Enumerable — "mattn (Yasuhiro Matsumoto)" <mattn.jp@...>

13 messages 2013/06/28

[#55699] [ruby-trunk - Feature #8579][Open] Frozen string syntax — "charliesome (Charlie Somerville)" <charliesome@...>

20 messages 2013/06/29

[#55708] [ruby-trunk - Bug #8584][Assigned] Remove curses — "shugo (Shugo Maeda)" <redmine@...>

17 messages 2013/06/30

[ruby-core:55273] [ruby-trunk - Feature #8481][Open] Module#using

From: "shugo (Shugo Maeda)" <redmine@...>
Date: 2013-06-03 13:58:50 UTC
List: ruby-core #55273
Issue #8481 has been reported by shugo (Shugo Maeda).

----------------------------------------
Feature #8481: Module#using
https://bugs.ruby-lang.org/issues/8481

Author: shugo (Shugo Maeda)
Status: Open
Priority: Normal
Assignee: matz (Yukihiro Matsumoto)
Category: core
Target version: current: 2.1.0


As I said at RubyKaigi2013, refinements in Ruby 2.0 have a problem that it's impossible to use incompatible refinements in the same file.
And at RubyKaigi, I've proposed the new option using: of instance_eval, by which you can activate refinements in the specified module only in the given block.
See my presentation slides for details: http://shugo.net/tmp/refining_refinements.pdf

However, Matz doesn't like that idea for the following two reasons:

1. It's difficult for users to expect what refinements are activated in a block.
2. It's difficult for Ruby implementors to implement it efficiently.

So, I propose Module#using instead of the using: option of instance_eval.
Module#using had once been introduced into trunk, but it was removed from Ruby 2.0.
I'd like to make it simpler, as follows.

1. Module#using activates refinements in a given module only in the current class or module definition.
2. So Module#using is private and the receiver of Module#using should be self.
3. The refinements never be activated in class or module definitions reopened later.
4. The refinements never be inherited to subclasses.

That is, Module#using works lexically.

EXAMPLE 1

  class Foo
    using Ref1
    # Refinements in Ref1 are activated only in the current definition of Foo.
  end
  class Bar
    using Ref2
    # Refinements in Ref2 are activated only in the current definition of Bar.
  end

EXAMPLE 2

  class Foo
    using Ref1
    # Refinements in Ref1 are activated only in the current definition of Foo.
  end
  class Foo
    # Refinements in Ref1 are not activated here.
  end

EXAMPLE 3

  class Foo
    using Ref1
    # Refinements in Ref1 are activated only in the current definition of Foo.
  end
  class Bar < Foo
    # Refinements in Ref1 are not activated here.
  end

Any thoughts?



-- 
http://bugs.ruby-lang.org/

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