[#43120] [ruby-trunk - Bug #6124][Open] What is the purpose of "fake" gems in Ruby — Vit Ondruch <v.ondruch@...>

27 messages 2012/03/07

[#43142] Questions about thread performance (with benchmark included) — Rodrigo Rosenfeld Rosas <rr.rosas@...>

A while ago I've written an article entitled "How Nokogiri and JRuby

10 messages 2012/03/08

[#43148] [ruby-trunk - Feature #6126][Open] Introduce yes/no constants aliases for true/false — Egor Homakov <homakov@...>

16 messages 2012/03/09

[#43238] [ruby-trunk - Feature #6130][Open] inspect using to_s is pain — Thomas Sawyer <transfire@...>

21 messages 2012/03/11

[#43313] [ruby-trunk - Feature #6150][Open] add Enumerable#grep_v — Suraj Kurapati <sunaku@...>

17 messages 2012/03/15

[#43325] [ruby-trunk - Bug #6154][Open] Eliminate extending WaitReadable/Writable at runtime — Charles Nutter <headius@...>

25 messages 2012/03/16

[#43334] [ruby-trunk - Bug #6155][Open] Enumerable::Lazy#flat_map raises an exception when an element does not respond to #each — Dan Kubb <dan.kubb@...>

9 messages 2012/03/16

[#43370] [ruby-trunk - Feature #6166][Open] Enumerator::Lazy#pinch — Thomas Sawyer <transfire@...>

15 messages 2012/03/17

[#43373] [ruby-trunk - Bug #6168][Open] Segfault in OpenSSL bindings — Nguma Abojo <git.email.address@...>

14 messages 2012/03/17

[#43454] [ruby-trunk - Bug #6174][Open] Fix collision of ConditionVariable#wait timeout and #signal (+ other cosmetic changes) — "funny_falcon (Yura Sokolov)" <funny.falcon@...>

10 messages 2012/03/18

[#43497] [ruby-trunk - Bug #6179][Open] File::pos broken in Windows 1.9.3p125 — "jmthomas (Jason Thomas)" <jmthomas@...>

24 messages 2012/03/20

[#43502] [ruby-trunk - Feature #6180][Open] to_b for converting objects to a boolean value — "AaronLasseigne (Aaron Lasseigne)" <aaron.lasseigne@...>

17 messages 2012/03/20

[#43529] [ruby-trunk - Bug #6183][Open] Enumerator::Lazy performance issue — "gregolsen (Innokenty Mikhailov)" <anotheroneman@...>

36 messages 2012/03/21

[#43543] [ruby-trunk - Bug #6184][Open] [BUG] Segmentation fault ruby 1.9.3p165 (2012-03-18 revision 35078) [x86_64-darwin11.3.0] — "Gebor (Pierre-Henry Frohring)" <frohring.pierrehenry@...>

8 messages 2012/03/21

[#43672] [ruby-trunk - Feature #6201][Open] do_something then return :special_case (include "then" operator) — "rosenfeld (Rodrigo Rosenfeld Rosas)" <rr.rosas@...>

12 messages 2012/03/26

[#43678] [ruby-trunk - Bug #6203][Open] Array#values_at does not handle ranges with end index past the end of the array — "ferrous26 (Mark Rada)" <markrada26@...>

15 messages 2012/03/26

[#43794] [ruby-trunk - Feature #6216][Open] SystemStackError backtraces should not be reduced to one line — "postmodern (Hal Brodigan)" <postmodern.mod3@...>

15 messages 2012/03/28

[#43814] [ruby-trunk - Feature #6219][Open] Return value of Hash#store — "MartinBosslet (Martin Bosslet)" <Martin.Bosslet@...>

20 messages 2012/03/28

[#43858] [ruby-trunk - Feature #6222][Open] Use ++ to connect statements — "gcao (Guoliang Cao)" <gcao99@...>

12 messages 2012/03/29

[#43904] [ruby-trunk - Feature #6225][Open] Hash#+ — "trans (Thomas Sawyer)" <transfire@...>

36 messages 2012/03/29

[#43951] [ruby-trunk - Bug #6228][Open] [mingw] Errno::EBADF in ruby/test_io.rb on ruby_1_9_3 — "jonforums (Jon Forums)" <redmine@...>

28 messages 2012/03/30

[#43996] [ruby-trunk - Bug #6236][Open] WEBrick::HTTPServer swallows Exception — "regularfry (Alex Young)" <alex@...>

13 messages 2012/03/31

[ruby-core:43384] [ruby-trunk - Feature #3908][Closed] private constant

From: Hiroshi Nakamura <nakahiro@...>
Date: 2012-03-18 04:38:27 UTC
List: ruby-core #43384
Issue #3908 has been updated by Hiroshi Nakamura.

Status changed from Assigned to Closed
Assignee changed from Yukihiro Matsumoto to Yusuke Endoh
Target version changed from 2.0.0 to 1.9.3

Closing as implemented at 1.9.3.
----------------------------------------
Feature #3908: private constant
https://bugs.ruby-lang.org/issues/3908#change-24689

Author: Yusuke Endoh
Status: Closed
Priority: Normal
Assignee: Yusuke Endoh
Category: core
Target version: 1.9.3


=begin
 Hi,
 
 I'd propose "private constant."
 Private constant provides method-like visibility for constant.
 
 
 === Sample code ===
 
   module SomeModule
     class PublicClass
       ...
     end
 
     class PrivateClass
       ...
     end
 
     # you can make "PrivateClass" private by private_constant method
     private_constant :PrivateClass
   end
 
   # we can refer access constant as is conventionally done
   p SomeModule::PublicClass  #=> SomeModule::PublicClass
 
   # a RuntimeError is raised when we attempt to refer private constant
   p SomeModule::PrivateClass  #=> private constant (RuntimeError)
 
   # we can even refer private constant from its parent scope
   module SomeModule
     p PrivateClass  #=> SomeModule::PrivateClass
   end
 
 
 === Background ===
 
 Traditionally, there is no way to prevent users from using your classes.
 It is too easy for user to access any internal class (e.g., CGI::Html3,
 Enumerator::Generator, Matrix::Scalar, URI::Util, etc).
 We can only write a document to ask users not to use them.
 
 RubySpec inspired me to propose this feature.  RubySpec declares the
 policy that no spec should be written for private method.  Nevertheless,
 there were some specs for internal classes, such as CGI::Html3 (FYI,
 such specs are already deleted).
 I thought this was because there is no way to explicitly declare that
 the constants are "internal use only."
 
 
 === Proposal ===
 
 Private constant is a scoped constant that can be referred only from
 its parent scope.  It can be used for declaring "the constant is
 for internal use," like private method.
 
 When users try to refer private constant, they can realize that they
 are going to use non-guaranteed feature, because the constant cannot
 be referred so easily.  Even so, they can use such a feature with
 self-responsibility, by explicitly opening its parent scope.
 
 Since the default visibility is public, this feature does not break
 any compatibility.
 
 
 === Current status ===
 
 I first suggested this at [ruby-dev:39685].
 Matz approved my proposal [ruby-dev:39686]
 Yugui has also approved [ruby-dev:40254], but said that it is needed
 to discuss in ruby-core list before commit.
 
 The patches are attached.  make check and make test-rubyspec are all
 passed.
 
 
 What do you think?
 I'll commit the patch unless there is objection.
 
 -- 
 Yusuke ENDOH <[email protected]>
=end



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