From Newsgroup: comp.lang.python.announce

竜 TatSu is a tool that takes grammars in a variation of EBNF as input, and outputs memoizing (Packrat) PEG parsers in Python.

Why use a PEG parser? Because regular languages (those parsable with
Python's `re` package) "cannot count". Any input with nested structures or
with balancing of demarcations requires more than regular expressions to be parsed.

竜 TatSu can compile a grammar stored in a string into a `tatsu.grammars.Grammar` object that can be used to parse any given input,
much like the `re` module does with regular expressions, or it can generate
a Python module that implements the parser.

On this release:


- validate with Python 3.12 (#313
<https://github.com/neogeny/TatSu/pull/313>)
- drop support for Python 3.10 (#313
<https://github.com/neogeny/TatSu/pull/313>)
- move build configuration to pyproject.toml (#316
<https://github.com/neogeny/TatSu/pull/316> #317
<https://github.com/neogeny/TatSu/pull/317>)
- evaluate constant to a Python literal when possible (#304
<https://github.com/neogeny/TatSu/issues/304> #320
<https://github.com/neogeny/TatSu/pull/320>)
- fix comments_re and eol_comments_re so they effectively can be None (
#307 <https://github.com/neogeny/TatSu/pull/307> #312
<https://github.com/neogeny/TatSu/issues/312> #314
<https://github.com/neogeny/TatSu/pull/314>)
- skip over whitespace and comments before memoizing (#305
<https://github.com/neogeny/TatSu/issues/305> #306
<https://github.com/neogeny/TatSu/pull/306> #309
<https://github.com/neogeny/TatSu/pull/309> #318
<https://github.com/neogeny/TatSu/pull/318>)
- verify that () parses to None or is ignored (#308
<https://github.com/neogeny/TatSu/pull/308>)


--
Juancarlo Añez
mailto:apalala@gmail.com
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