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[syntax-errors] Irrefutable case pattern before final case (#16905)

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Summary
--

Detects irrefutable `match` cases before the final case using a modified
version
of the existing `Pattern::is_irrefutable` method from the AST crate. The
modified method helps to retrieve a more precise diagnostic range to
match what
Python 3.13 shows in the REPL.

Test Plan
--

New inline tests, as well as some updates to existing tests that had
irrefutable
patterns before the last block.
This commit is contained in:
Brent Westbrook 2025-03-26 12:27:16 -04:00 • committed by GitHub
parent 58350ec93b
commit 5697d21fca
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12
crates/ruff_python_parser/resources/inline/err/irrefutable_case_pattern.py Normal file
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@ -0,0 +1,12 @@
match x:
case var: ... # capture pattern
case 2: ...
match x:
case _: ...
case 2: ... # wildcard pattern
match x:
case var1 as var2: ... # as pattern with irrefutable left-hand side
case 2: ...
match x:
case enum.variant | var: ... # or pattern with irrefutable part
case 2: ...