The tl;dr is that actions specified in the grammar are specific to the target language. So if you want to use the pegen tool to generate both Python and C code for the same grammar, you would need two grammar files with the same grammar but different actions. Since our goal here is just to generate a parser for use in CPython that's not a problem. Other PEG parser generators make different choices, e.g. TatSu puts semantics actions in a separate file (https://tatsu.readthedocs.io/en/stable/semantics.html).
On Sun, Apr 5, 2020 at 11:06 AM Pablo Galindo Salgado <pablog...@gmail.com> wrote: > > The only thing I'm missing from the PEP is more detail about how the > cross-language nature of the parser actions are handled. > > Expanded the "actions" section in the PEP here: > https://github.com/python/peps/pull/1357 > _______________________________________________ > 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/EJMHASPUOAW7R2BKJCCVI4BGQRLN3ZRX/ > Code of Conduct: http://python.org/psf/codeofconduct/ > -- --Guido van Rossum (python.org/~guido) *Pronouns: he/him **(why is my pronoun here?)* <http://feministing.com/2015/02/03/how-using-they-as-a-singular-pronoun-can-change-the-world/>
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