[ruby-core:28306] Re: [Feature #1082] add Object#singleton_class method

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On Feb 23, 2010, at 08:46 , Kornelius Kalnbach wrote:

>> Then, the next issue is whether Kernel#singleton_class should create
>> an eigenclass when the receiver has no eigenclass.  It would be better
>> to have an optional argument (singleton_class(true/false) or
>> singleton_class(:create =3D> true)?) to switch the behavior.
> I always perceived singleton classes to be transparently created in the
> background. Would it be wise to give the programmer access to its
> existence status? (I assume singleton_class(false) =3D=3D nil would behav=
e
> like a singleton_class? method.) Today, Ruby has no way of telling
> whether an object already has a singleton class, or am I wrong?
>=20
> Also, why would I ask for a singleton_class without using it?
>=20

Agreed. I always assumed that not having a singleton class object for every=
 object was an implementation detail.

Konstantin

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