Re: PHP Abstract Syntax Tree

On Fri, April 14, 2006 4:26 am, Sebastian Bergmann wrote: > Dmitry Stogov schrieb: >> So some optimizations may be done fine on AST level too. > > ASTs are useful for performing code transformations (think of > language > extensions like William's PHPAspect or automatic refactorings as > examples). Naive Input: So it's a lot like XSLT, which can be really nifty. But that doesn't make XSLT something that I want to employ on every XML file that I want to convert and spit out *fast* in a production application. Depending on the transformation involved and the source/output needed (or that you're stuck with, usually) it seems to me that XSLT can be a big winner or a big loser. Seems like AST is a great tool for code analysis, development, debugging, re-factoring, optimizing -- but I don't see how that makes it a winner for the run-time compilation. Perhaps, though, a side-by-side comparison of William's AST-compiled code and PHP native JIT-byte-compiled code would be interesting to explore... If the AST could be spliced in as a patch and given a trial run. 'Course, I'm not the guy that is gonna have to do all that work :-) -- Like Music? http://l-i-e.com/artists.htm