I see. So maybe if you had a fixed XSD or XSLT at compile time you could emit a faster but specialized parser or transformer. But maybe that wouldn't work out

I see. So maybe if you had a fixed XSD or XSLT at compile time you could emit a faster but specialized parser or transformer. But maybe that wouldn't work out so well in practice. I did find an interesting slide deck from the scala universe that mentions something like F# type providers (among other things) as possible applications. http://scalamacros.org/paperstalks/2014-02-04-WhatAreMacrosGoodFor.pdf http://scalamacros.org/paperstalks/2014-02-04-WhatAreMacrosG...