Re: [Ficl-developers] Quick FICL OO Question

[john s. <joh...@al...>]

David -
You need to create an 'init' method for your class that takes the ( c-addr 
u -- ) of the filename off the stack
and uses it to create the instance as you wish.

Right now there's no easy way to override a metaclass method, 
unfortunately. But I did think enough to provide a hook
in the form of 'init' to do this sort of thing. Alternatively, you could 
define a 'fromstring' method that does the setup that you want
and call it explicitly on a new instance. This has the advantage that it 
does not change the expected signature of 'init' ( 2:this -- ).

If you create a 'new' method in c-inifile, it does not have the effect you 
want. Since methods of c-inifile describe the behavior of c-inifile 
*instances*, you are not overriding metaclass's 'new'. There are certainly 
times when it would be good to be able to extend metaclass
in various ways.
- John

At 11/22/01 08:38 PM, you wrote:
>Hi,
>
>I want to build a class with a constructor that takes and argument and
>acts on that argument.
>
>For example:
>
>   s" file.ini" c-inifile --> new ( "filename" -- class inst )
>
>c-inifile is a class governing *.ini files, whose 'new' constructor
>method takes a filename argument, parses the file's contents, and
>returns a class-instance pair on the stack.
>
>If I simply define a method 'new' within the class def, will execution
>of this method result in an automatic call to the 'metaclass' 'new'
>method?
>
>Or will I need to have something like
>
>   postpone super --> new
>
>within c-inifile's 'new' method? And in this case, will 'super -->
>new' create an instance of the correct size?
>
>Thoughts?
>David
>
>
>
>_______________________________________________
>Ficl-developers mailing list
>Fic...@li...
>https://lists.sourceforge.net/lists/listinfo/ficl-developers

John Sadler - joh...@al...
T 650-595-4954  F 603-687-2885  C 415-271-6795