Hi Erik, My first question is whether anyone is working on this as well (or > hasalready done so and I missed it), to avoid duplication of effort.
We have already done this work. This was a contribution by Matthieu Dartiailh: https://github.com/we-like-parsers/pegen/blob/main/data/python.gram I hope you find this useful, Cheers from cloudy London, Pablo On Thu, 23 Sept 2021 at 20:10, Erik Demaine <edema...@mit.edu> wrote: > Dear python-dev, > > I've been working on a port of cpython/Grammar/python.gram from C (as > currently used in all the {} expressions to build the AST) to Python, > directly > building nodes via the ast package. My motivation for this (as opposed to > calling ast.parse, which uses the C parser) is to make it easy to > experiment > with adding features to the syntax, without having to build CPython. > Porting > is mostly straightforward, but it is a fair amount of work, because there > are > a lot of expressions to port > > My first question is whether anyone is working on this as well (or has > already done so and I missed it), to avoid duplication of effort. > > Assuming not, my next question is where this belongs. Some natural > options I > see: > > 1. Add it to cpython as a grammar maintained in parallel with the C > grammar. > This would mean more maintenance when the grammar changes, but the plus > side > is it guarantees that the two grammars (and ast) remain synchronized. > > 2. PyPy > > 3. 3rd party library (e.g., my own repo) > > Let me know what you think would be best. > > Erik > -- > Erik Demaine | edema...@mit.edu | http://erikdemaine.org/ > _______________________________________________ > 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/UM7ANICTBDU3Q2DLKFZIK6C6OU3THKP4/ > Code of Conduct: http://python.org/psf/codeofconduct/ >
_______________________________________________ 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/VN7HT3O4ZX6GEVUE4SGNRVU6WYZCLUG5/ Code of Conduct: http://python.org/psf/codeofconduct/
