[Somelib] Errors with downcasting using SOME::Object

[John P. <jo...@ma...>]

I am trying to integrate SOMELib into snaglepuss and am having errors
with downcasting my objects.

You see I have a hiarchy of interfaces for use with dynamicly loadable
assets (png, mp3, mpg files).  They all get loaded and stuffed into
chests which are just glorified vectors of type mriIAsset *.  Now each
of the assets can be rendered to the screen, audio device, etc. with a
call to the render() method.  But, each type of asset also has enhanced
functionality based on their type so my png loader asset would also
inherit the interface mriIVisualAsset which would in turn inherit the
mriIAsset interface.  The problem I am having is that when I load my
object I check to see if it is visual, audio.  Let's say it is a visual
asset.  I then use this code to construct the object:

SOME::Object<mriIVisualAsset>oAsset(assets[0]);
//construct our asset
if(!oAsset.construct()){ ...

this works fine but now I want to add this asset to my chest:

asset = static_cast<mriIAsset *>(oAsset);  //error here.  I'm guessting
the template is not truly inheriting

chest->addAsset( chestpos, asset );//I should be able to mix and match
different assests in my chest

This is an important feature and as much as I know you love the boost
stuff if it restricts projects from using standard C++ mechanisms when
working with SOMELib it will have to go.

-Quinticent