Nick Coghlan <ncogh...@gmail.com> added the comment:
It's specifically the definition of "match_case" in the AST that is affected:
match_case = (pattern pattern, expr? guard, stmt* body)
pattern = MatchAlways
| MatchValue(expr value)
| MatchConstant(constant value)
| MatchSequence(pattern* patterns)
| MatchMapping(expr* keys, pattern* patterns)
| MatchClass(expr cls, pattern* patterns, identifier* extra_attrs,
pattern* extra_patterns)
| MatchRestOfSequence(identifier? target)
-- A NULL entry in the MatchMapping key list handles capturing extra
mapping keys
| MatchAs(pattern? pattern, identifier target)
| MatchOr(pattern* patterns)
attributes (int lineno, int col_offset, int? end_lineno, int?
end_col_offset)
Relative to the PEP 642 AST, the notion of a "matchop" is gone - MatchValue
always compares by equality, and there's a MatchConstant node for the identity
comparisons against None, True, and False.
The grammar, code generator, AST validator, and unparser are then updated to
produce or consume the new AST nodes.
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<https://bugs.python.org/issue43892>
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