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From: merch-redmine@jeremyevans.net
To: ruby-dev@ruby-lang.org
Subject: [ruby-dev:51047] [Ruby master Bug#17571] prependしたArray#[] が反映されない
Date: Fri, 09 Apr 2021 17:23:40 +0000 (UTC)	[thread overview]
Message-ID: <redmine.journal-91439.20210409172340.20841@ruby-lang.org> (raw)
In-Reply-To: <redmine.issue-17571.20210122234903.20841@ruby-lang.org>

Issue #17571 has been updated by jeremyevans0 (Jeremy Evans).

Status changed from Open to Closed

I tested with the master branch and Ruby 3.0.1, and this problem appears fixed.

----------------------------------------
Bug #17571: prependしたArray#[] が反映されない
https://bugs.ruby-lang.org/issues/17571#change-91439

* Author: freedom (free dom)
* Status: Closed
* Priority: Normal
* Assignee: ko1 (Koichi Sasada)
* ruby -v: ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [x86_64-linux]
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN
----------------------------------------
Arrayクラスにprependを使い`[]`メソッドを差し込んでもprependした`[]`を呼び出しません

また、Hashを継承したクラス(以下HashB)のインスタンスでHash#[]を既に呼び出している場合
prependして差し込んだ`[]`を通らずにHash#[]が呼び出されているようです

HashBのインスタンス呼び出しがprependより後の場合は期待通り動きました

再現コード(Array)
``` ruby
module TestMod
  def [](*)
    p :called
    super
  end
end
Array.prepend TestMod

[][1] # => 何も出力されない

```


再現コード(Hash)

``` ruby
module TestMod
  def [](*)
    p :called
    super
  end
end
class HashB < Hash;end
HashB.new[1]

Hash.prepend TestMod
{}[1] # => 何も出力されない

```

よろしくおねがいします



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

      reply	other threads:[~2021-04-09 17:23 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-22 23:49 [ruby-dev:50993] " under_free_fall
2021-04-09 17:23 ` merch-redmine [this message]

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