On 10/5/2010 3:43 AM, Thomas Heller wrote:
On Mon, Oct 4, 2010 at 8:45 PM, Eric Niebler<[email protected]> wrote:
On 10/4/2010 6:49 AM, Thomas Heller wrote:
Hi,
I spent some time on thinking how one could make the traversal of a proto
expression tree easier. I know want to share my findings with you all, and
propose a new addition to proto.
My first idea was to decouple grammars from transforms, to follow the idea of
separation of data and algorithm.
Data and algorithm are already separate in Proto. "Data" is the
expression to traverse. "Algorithm" is the transform, driven by
pattern-matching in the grammar.
True, but you can only attach one grammar to one transform. Thus for
every transformation you want to make, you need (in theory) replicate
your grammar, see further down that this is not the case in real life.
(I'm slowly trying to grok all these. Pardon my recent inactivity. It
was really meant to be a sabbatical to assess where I am now in terms
of C++ coding.)
Anyway, this one is very appealing indeed:
one grammar to multiple transforms
, not exclusively in the standpoint of Proto but can have
implications for Spirit as well. I'm listening/reading...
Regards,
--
Joel de Guzman
http://www.boostpro.com
http://spirit.sf.net
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