Greg Ewing wrote: > On 3/04/20 7:10 am, Guido van Rossum wrote: > > Since last fall's core sprint in London, Pablo > > Galindo Salgado, > > Lysandros Nikolaou and myself have been working on a new parser for > > CPython. We are now far enough along that we present a PEP we've written: > > https://www.python.org/dev/peps/pep-0617/ > > Was any consideration given to other types of parser, such > as LR or LALR? > LR parsers handle left recursion naturally, and don't suffer > from any of the drawbacks mentioned in the PEP such as taking > exponential time or requiring all the source to be loaded > into memory. > I think there needs to be a section in the PEP justifying the > choice of PEG over the alternatives.
I think "needs" is a bit strong. It would be nice, though. Regardless, as long as this is a net improvement over the status quo I don't see this being rejected on the grounds that an LR or LALR parser would be better since we have a working PEG parser today. :) _______________________________________________ Python-Dev mailing list -- python-dev@python.org To unsubscribe send an email to python-dev-le...@python.org https://mail.python.org/mailman3/lists/python-dev.python.org/ Message archived at https://mail.python.org/archives/list/python-dev@python.org/message/NZAFQSEJD6SCXLSFNTNMPEJZM5XJ7TKL/ Code of Conduct: http://python.org/psf/codeofconduct/
