On 9/15/2010 1:38 AM, Roland Bock wrote:
On 09/15/2010 06:09 AM, Eric Niebler wrote:
Also, see the series of articles about Proto I'm currently publishing on cpp-next.com. Here's the latest:
http://cpp-next.com/archive/2010/09/expressive-c-playing-with-syntax/
Very nicely written! I'll definitely try to replace the current implementation of the WHERE expression, especially since Joel has offered to help with it :-)
I probably also should use proto to build sequences of query building blocks like WHERE, GROUP_BY, ORDER_BY, LIMIT. I guess I could employ boost::mpl::less to make sure that a WHERE can be followed by a GROUP_BY expression, but not vice versa.
No, you'd write the grammar of your DSEL using Proto. See the docs for Proto grammars. The article series hasn't gotten around to talking about that yet. -- Eric Niebler BoostPro Computing http://www.boostpro.com