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List:       python-announce-list
Subject:    [Python-announce] TatSu v5.9.0 - PEG parser generator
From:       Juancarlo_Añez <apalala () gmail ! com>
Date:       2023-10-22 14:38:16
Message-ID: CAL8UGB5WitYeb5mFXkhSi9A=7uhN+5xUGwZycOt50Po2iD8Jeg () mail ! gmail ! com
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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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