This whish list is obsolete, please use the ticket system for bugs and tasks on savannah.
I don't think this is worth a task, as eiffeldoc already is an example for EXTERNAL_TOOL.
Is it worth a ticket? -> I don't think so. it's too unspecific what TREE should be good for.
Incremental Eiffel compilation
On C level the code is "incrementally" compiled ;-) But no, there will not be a redesign in near future. So we should better drop this request.
New keyword "attribute"?
==> task:13319 / DONE
Finally implementing SCOOP?
Make generated C code thread-safe?
TUPLE argument in feature 'call' of class PROCEDURE
==> task:13318 / DONE