From: matz@... (Yukihiro Matsumoto)
Date: 2002-01-28T00:44:26+09:00
Subject: Re: TypeError verus NoMethodError

Hi,

In message "TypeError verus NoMethodError"
    on 02/01/26, "Chr. Rippel" <chr_news@gmx.net> writes:

|I wanted to point out an inconistency (IMO as usual) that build
|in singleton/immutable classes NilClass, TrueClass FalseClass,
|Symbols and Numeric instances follow the old style Exception
|scheme of raising a TypeError when attempting to clone or dup -
|instead of following the new style NoMethodError exception.

It's TypeError because they are *special (immediate) values*.  I don't
think Fixnums and Symbols are singletons.  But, hmm, maybe it's good
to remove dup and close from those happened to be singletons.

|I also take this as an opportunity to send in a fix for my revisited
|version of singleton.rb - (I just realized that I removed the wrong
|dup ...).  Hm, maybe we should stick with the old version
|anyway ...

Ah, next time, send me a "patch", preferably in unified diff (diff -u).

							matz.