Re: Re: Re: Re[2]: Re: class proposal

Mark Hahn wrote:
> Lenard Lindstrom wrote:

>>> Can you show me a metaclass example that Prothon cannot handle?  I
>>> would like to understand this situation better.
>>>
>> Metaclassing let me make Python's class statement create prototype
>> object instances. In Python the class statement is simply a
>> specialized
>> function call. The inheritance section and class body are evaluated to
>> provide the arguments. By default object 'type' is called to return a
>> new object. Metaclassing is simply a way to change the function
>> called.
>> This permits new kinds of class systems to be added to Python without
>> changes to the language. But in Prothon one only has prototypes. And
>> the
>> object statement can only return new prototype instances. In Python if
>> you do not like existing object behaviour you are free to implement
>> your own object types and have language support for them.

> You have explained how Python metaclasses work.  I was asking for something
> metaclasses can do that Prothon cannot do.

> Serge gave me a reference to some metaclass examples.  I am in the process
> of trying to understand them and see how Prothon would deal with them.
> Serge himself says that metaclasses are only decorators, whatever that
> means.

I don't remember saying *are only* decorators, I think I wrote "mostly as".
I also think it's abuse.

What do you mean whatever that [decorators] means? Don't you follow
python-dev? Or do you think I use the word in some other way?


  -- Serge