[colm-users] new way of constructing trees

Jim Cordy cordy at cs.queensu.ca
Thu Sep 10 00:21:42 UTC 2009

Cool, I think - not sure that I understand!


On 9-Sep-09, at 7:54 PM, Adrian Thurston wrote:

> Hi,
> I'm experimenting with a new way in Colm to make trees. The existing
> construct expression is useful for building trees in a bottom up
> fashion. It is parsed at compile-time to give some static assurance of
> success.
> The existing parse expression can be used to parse from a stream  
> source,
> or reparse the text of a tree as a new type. The parsing happens at
> run-time and may fail.
> A new third method, the accumulator, can be used to incrementally  
> build
> a tree by parsing little bits at a time. This is useful for building  
> an
> output tree over the course of a top-down, left-right traversal.
> See here for a simple example:
> http://svn.complang.org/colm/trunk/test/accum.lm
> http://svn.complang.org/colm/trunk/test/accum.in
> -Adrian
> _______________________________________________
> colm-users mailing list
> colm-users at complang.org
> http://www.complang.org/mailman/listinfo/colm-users

More information about the colm-users mailing list