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bpo-44456: Improve the syntax error when mixing keyword and positional patterns (GH-26793)

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(cherry picked from commit 0acc258fe6)

Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>
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Miss Islington (bot) 2021-06-24 08:34:28 -07:00 • committed by GitHub
parent b3fac2926b
commit 11f1a30cdb
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6 changed files with 843 additions and 635 deletions
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24
Lib/test/test_syntax.py
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@ -1240,6 +1240,30 @@ Corner-cases that used to crash:
... ...
Traceback (most recent call last):
SyntaxError: invalid pattern target
>>> match ...:
... case Foo(z=1, y=2, x):
... ...
Traceback (most recent call last):
SyntaxError: positional patterns follow keyword patterns
>>> match ...:
... case Foo(a, z=1, y=2, x):
... ...
Traceback (most recent call last):
SyntaxError: positional patterns follow keyword patterns
>>> match ...:
... case Foo(z=1, x, y=2):
... ...
Traceback (most recent call last):
SyntaxError: positional patterns follow keyword patterns
>>> match ...:
... case C(a=b, c, d=e, f, g=h, i, j=k, ...):
... ...
Traceback (most recent call last):
SyntaxError: positional patterns follow keyword patterns
"""
import re