[Laszlo-dev] question about mixins

[Max Carlson]

It sounds like we shouldn't need these.  I wonder if they're left over 
from when mixins were dynamically applied at runtime?

Henry Minsky wrote:
> While I'm tracking down the instance mixin bug with nested views, I was 
> noticing that when we declare a mixin
> in LZX, we are emitting an actual class declaration for it into the 
> output object file.
> 
> e.g., in source code you have
> 
>    <mixin name="boxmodel">
> ...
> </mixin
> 
> And that ends up emitting script code for
> 
>                            dynamic class $lzc$class_boxmodel extends 
> LzView { ... }
> 
> But is it really necessary to actually have the mixin  class as an 
> instantiable class at runtime? People aren't ever expected to instantiate
> a mixin by itself, right? And the script compiler copies  out the 
> methods and attributes to construct interstitial
> classes at compile time,  so  we don't actually need to emit an actual 
> class definition for the mixin class itself into the output file?
> It wouldn't save much space in practice I guess, since most apps  don't 
> have a lot of mixins declared, but it would reduce the object file a little
> if we didn't put these in..
> 
> 
> 
> -- 
> Henry Minsky
> Software Architect
> hminsky at laszlosystems.com <mailto:hminsky at laszlosystems.com>
> 
> 

-- 
Regards,
Max Carlson
OpenLaszlo.org