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bpo-43822: Improve syntax errors for missing commas (GH-25377)

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Pablo Galindo 2021-04-15 21:38:45 +01:00 • committed by GitHub
parent e692f55979
commit b280248be8
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13 changed files with 1235 additions and 1034 deletions
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24
Lib/test/test_syntax.py
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@ -248,22 +248,36 @@ SyntaxError: did you forget parentheses around the comprehension target?
# Missing commas in literals collections should not
# produce special error messages regarding missing
# parentheses
# parentheses, but about missing commas instead
>>> [1, 2 3]
Traceback (most recent call last):
SyntaxError: invalid syntax
SyntaxError: invalid syntax. Perhaps you forgot a comma?
>>> {1, 2 3}
Traceback (most recent call last):
SyntaxError: invalid syntax
SyntaxError: invalid syntax. Perhaps you forgot a comma?
>>> {1:2, 2:5 3:12}
Traceback (most recent call last):
SyntaxError: invalid syntax
SyntaxError: invalid syntax. Perhaps you forgot a comma?
>>> (1, 2 3)
Traceback (most recent call last):
SyntaxError: invalid syntax. Perhaps you forgot a comma?
# Make sure soft keywords constructs don't raise specialized
# errors regarding missing commas
>>> match x:
... y = 3
Traceback (most recent call last):
SyntaxError: invalid syntax
>>> match x:
... case y:
... 3 $ 3
Traceback (most recent call last):
SyntaxError: invalid syntax
From compiler_complex_args():
@ -864,7 +878,7 @@ leading to spurious errors.
SyntaxError: cannot assign to attribute here. Maybe you meant '==' instead of '='?
Ensure that early = are not matched by the parser as invalid comparisons
>>> f(2, 4, x=34); {1,2 a}
>>> f(2, 4, x=34); 1 $ 2
Traceback (most recent call last):
SyntaxError: invalid syntax