[issue42128] Structural Pattern Matching (PEP 634)

[Lysandros Nikolaou]

Lysandros Nikolaou <lisandrosnik at gmail.com> added the comment:

The grammar is indeed auto-generated by reading the actual Grammar file, python.gram. Here's the lexer Pablo had developed for doing the syntax-highlighting.

https://github.com/python/cpython/blob/master/Doc/tools/extensions/peg_highlight.py

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<https://bugs.python.org/issue42128>
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