ruby-dev

けいじゅ＠日本ラショナルソフトウェアです.

In [ruby-dev :00320 ] the message: "[ruby-dev:320] Re: [Q] [Re: [BUG]
method index] ", on Aug/29 11:32(JST) matz@netlab.co.jp (Yukihiro
Matsumoto) writes:

>まつもと ゆきひろです

>|1.
>特異クラスは取り出せません．ドキュメントにある特異クラス定義
>(新しいマニュアルでは用語を変えます)の動作モデルは
>
>  * そのオブジェクトに固有の動作を表現する「一時的な」クラス
>    (仮想クラスと呼びましょう)を作り，それに対して機能を追加
>    する．
>
>  * endがきたら，その仮想クラスに対して行われた操作を元にオ
>    ブジェクトの固有の挙動を変更する．

>というものです．つまり，仮想クラスは仮想的なものですから，
>ObjectSpace.each_objectで取り出せません．実際の実装では仮想
>クラスはいつも存在しているのですが．

仮想クラスの件はなっとくしましたが, 少し気になる点が... 

仮想クラスのクラス定数やインスタンス変数はどうします? 仮想的なクラスに
状態があるというのも変ですよね? クラス定数は特異クラス定数みたいな概念
を出せば済むと思いますが... どう考えてもインスタンス変数は無理がありま
すよね?

>|2.
>Module#ancestorsです．結局平凡な名前になりました．

それほど平凡でもないような(^^;;;

3. ついでにリクエスト
インスタンスとクラスの関係を調べるメソッドはありますが, クラスとクラス
の関係を調べるメソッドがないことに気づきました.

* ancestor_of?    せんぞか(module含む)?
* superclass_of?  直接のスーパクラスか?
* subclass_of?    直後のサブクラスか?
* descendant_of?  子孫か(module含む)?

__
................................石塚 圭樹＠日本ラショナルソフトェア...
----------------------------------->> e-mail: keiju@bc.mbn.or.jp <<---

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[#116] Re: meta programming features — matz@... (Yukihiro Matsumoto)

[#117] Re: tail recursion (Re: LaTeX ruby documents) — keiju@... (石塚圭樹 )

[#118] Re: [!?] local variable and accessor — keiju@... (石塚圭樹 )

[#121] Re: meta programming features — keiju@... (石塚圭樹 )

[#123] ruby 1.1 alpha0 released — matz@... (Yukihiro Matsumoto)

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[#167] argument default value — shugo@... (前田修吾 / maeda shugo)

[#272] [Bug] default argument value — shugo@... (前田修吾 / maeda shugo)

[#291] illegal here document — shugo@... (前田修吾 / maeda shugo)