Is this a case for metaclasses?
michele.simionato at gmail.com
Thu Aug 5 16:43:23 CEST 2004
Hartmut Goebel <h.goebel at goebel-consult.de> wrote in message news:<411207dd$0$7323$9b4e6d93 at newsread2.arcor-online.net>...
> I'm currently implementing a tool for auto-generating webforms from a
> desription file. The output should become a php-script, an asp-script,
> additions. The output format should be defined ar runtime (php,
> Currently I have a fixed class hierarchy:
> generic : implements generic html widgets (input, radiobuttons)
> php : "mixin" for adding php-specifi code to the widget,
> eg. getting values from HTTP_POST_VARS/_POST
> Obviously this does not scale as soon as I add more mid-layers (asp,
> psp, etc.).
> For me this sounds like I could benefit from using metaclasses here.
> Before I start implementing such a beast, I want to be shure, there will
> be a benefit.
> Any suggestions?
Metaclasses are essentially syntactic sugar. You can do more or less
everything without them. For instance you can use a poor man function
format your classes as you wish. Then, you have to apply the function
to the every subclass by hand. If you use a metaclass, subclasses are
automatically reformatted, instead. So, using a function means
a bit more typing but greater expliciteness. Metaclasses are okay
if you want to hide to your users the fact that something magic is
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