[closer-devel] Active layers...

[Pascal Costanza]

Hi,

I have added a new introspective function to ContextL that I find  
extremely useful in my own attempts at actually using ContextL for  
some non-trivial examples.

Active-layers returns the set of currently active layers (without all  
the noise that the layer context objects produce). It accepts an  
optional parameter for passing a layer context, which defaults to the  
currently active layer context.

The functions ensure-active-layer and ensure-inactive-layer now call  
active-layers in the end to produce a useful response. If anyone of  
you counted on the return values previously returned by those two  
functions (the new active layer context), please let me know and I  
will immediately revert that change. (It's not critical to me one way  
or the other, I just find the call of active-layers a more useful  
response than the one before.)

On a somewhat unrelated note: I have removed the explicit loading of  
the gbbopen.asd file at the top of contextl.asd. The current version  
of GBBopen now adds an explicit portable-threads.asd, which is all  
that is needed for ContextL. (Thanks to Attila for informing me about  
this.)


Best,
Pascal

-- 
Pascal Costanza, mailto:pc at p-cos.net, http://p-cos.net
Vrije Universiteit Brussel, Programming Technology Lab
Pleinlaan 2, B-1050 Brussel, Belgium