[#44776] [ruby-trunk - Bug #6385][Open] mtime vie File.stat(filename).utime vs File.open(filename, 'r').mtime in Windows — "kolmanv (Kolman Vornovitsky)" <kolmanv@...>

9 messages 2012/05/01

[#44782] [ruby-trunk - Bug #6387][Open] 1.9.3p194 crashed on require in ubuntu — "ywen (Yi Wen)" <hayafirst@...>

12 messages 2012/05/01

[#44795] [ruby-trunk - Bug #6391][Open] Segment Fault while execute make_encmake.rb for Ruby 1.9.3 P194 ( MinGW64) — "raylinn@... (ray linn)" <raylinn@...>

13 messages 2012/05/02

[#44911] [ruby-trunk - Bug #6408][Open] DelegateClass#eql? and <=> don't work as expected — "tenderlovemaking (Aaron Patterson)" <aaron@...>

11 messages 2012/05/06

[#44951] [ruby-trunk - Feature #6414][Open] Destructuring Assignment — "edtsech (Edward Tsech)" <edtsech@...>

14 messages 2012/05/08

[#44958] [ruby-trunk - Feature #6418][Assigned] Supporing a subset of ANSI escape code on Windows — "usa (Usaku NAKAMURA)" <usa@...>

11 messages 2012/05/09

[#45035] [ruby-trunk - Bug #6433][Open] rb_thread_blocking_region(): ubf() function is executed with GVL — ibc (Iñaki Baz Castillo) <ibc@...>

12 messages 2012/05/14

[#45180] [ruby-trunk - Feature #6478][Open] BasicObject#__class__ — "trans (Thomas Sawyer)" <transfire@...>

14 messages 2012/05/22

[#45193] [ruby-trunk - Feature #6482][Open] Add URI requested to Net::HTTP request and response objects — "drbrain (Eric Hodel)" <[email protected]>

16 messages 2012/05/23

[#45198] [ruby-trunk - Feature #6483][Open] parametric map — "prijutme4ty (Ilya Vorontsov)" <prijutme4ty@...>

14 messages 2012/05/23

[#45222] [ruby-trunk - Feature #6492][Open] Inflate all HTTP Content-Encoding: deflate, gzip, x-gzip responses by default — "drbrain (Eric Hodel)" <[email protected]>

23 messages 2012/05/24

[#45252] [ruby-trunk - Feature #6499][Open] Array::zip — "prijutme4ty (Ilya Vorontsov)" <prijutme4ty@...>

14 messages 2012/05/26

[#45272] [ruby-trunk - Feature #6503][Open] Support for the NPN extension to TLS/SSL — "igrigorik (Ilya Grigorik)" <ilya@...>

13 messages 2012/05/27

[#45316] [ruby-trunk - Feature #6515][Open] array.c: added method that verifies if an Array is part of another — "lellisga (Li Ellis Galardo)" <lellisga@...>

14 messages 2012/05/30

[ruby-core:45218] [ruby-trunk - Feature #6478] BasicObject#__class__

From: "Eregon (Benoit Daloze)" <redmine@...>
Date: 2012-05-24 19:01:03 UTC
List: ruby-core #45218
Issue #6478 has been updated by Eregon (Benoit Daloze).


nobu (Nobuyoshi Nakada) wrote:
> Seems what you want is (({dup})), not (({__class__})).
> 
>   class Foo < BasicObject
>     mix ::Kernel, dup: :dup, clone: :clone
>   end

But that would include all methods from Kernel with the current behavior of #mix, as `mix ::Kernel` would do.
So you need to opt-out all methods:

    class Foo < BasicObject
      meths = (::Kernel.instance_methods - [:dup])
      mix ::Kernel, meths.each_with_object(dup: :dup) { |m,h| h[m] = nil }
    end

(And Foo.new.dup fails with "undefined method `initialize_dup'")


That behavior of #mix is not very intuitive I think, what do you think about:

diff --git a/class.c b/class.c
index 8e637c0..e9d7a7e 100644
--- a/class.c
+++ b/class.c
@@ -769,8 +769,9 @@ do_mix_method_i(st_data_t key, st_data_t value, st_data_t arg)
     st_table *aliasing = argp->aliasing;
     st_data_t old, alias;

-    if (aliasing && st_lookup(aliasing, ID2SYM(id), &alias)) {
-       if (NIL_P(alias)) return ST_CONTINUE;
+    if (aliasing) {
+       if (!st_lookup(aliasing, ID2SYM(id), &alias) || NIL_P(alias))
+           return ST_CONTINUE;
        id = rb_to_id(alias);
     }
     if (st_lookup(argp->mtbl, id, &old)) {

(and corresponding changes for the three other functions).
That is, if a Hash of methods is given, only import these methods.

----------------------------------------
Feature #6478: BasicObject#__class__
https://bugs.ruby-lang.org/issues/6478#change-26805

Author: trans (Thomas Sawyer)
Status: Feedback
Priority: Normal
Assignee: matz (Yukihiro Matsumoto)
Category: core
Target version: 2.0.0


How else is one supposed to get the class of a subclass of BasicObject?



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