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Unparenthesized lambda no longer allowed in comp_if since Python 3.9

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This commit is contained in:
gousaiyang
2021-04-06 18:43:01 -07:00
parent 5edab0407a
commit 8dee324d0c
3 changed files with 13 additions and 6 deletions
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4
parso/python/grammar310.txt
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@@ -97,9 +97,7 @@ suite: simple_stmt | NEWLINE INDENT stmt+ DEDENT
namedexpr_test: test [':=' test] namedexpr_test: test [':=' test]
test: or_test ['if' or_test 'else' test] | lambdef test: or_test ['if' or_test 'else' test] | lambdef
test_nocond: or_test | lambdef_nocond
lambdef: 'lambda' [varargslist] ':' test lambdef: 'lambda' [varargslist] ':' test
lambdef_nocond: 'lambda' [varargslist] ':' test_nocond
or_test: and_test ('or' and_test)* or_test: and_test ('or' and_test)*
and_test: not_test ('and' not_test)* and_test: not_test ('and' not_test)*
not_test: 'not' not_test | comparison not_test: 'not' not_test | comparison
@@ -155,7 +153,7 @@ argument: ( test [comp_for] |
comp_iter: comp_for | comp_if comp_iter: comp_for | comp_if
sync_comp_for: 'for' exprlist 'in' or_test [comp_iter] sync_comp_for: 'for' exprlist 'in' or_test [comp_iter]
comp_for: ['async'] sync_comp_for comp_for: ['async'] sync_comp_for
comp_if: 'if' test_nocond [comp_iter] comp_if: 'if' or_test [comp_iter]
# not used in grammar, but may appear in "node" passed from Parser to Compiler # not used in grammar, but may appear in "node" passed from Parser to Compiler
encoding_decl: NAME encoding_decl: NAME

4
parso/python/grammar39.txt
View File

@@ -97,9 +97,7 @@ suite: simple_stmt | NEWLINE INDENT stmt+ DEDENT
namedexpr_test: test [':=' test] namedexpr_test: test [':=' test]
test: or_test ['if' or_test 'else' test] | lambdef test: or_test ['if' or_test 'else' test] | lambdef
test_nocond: or_test | lambdef_nocond
lambdef: 'lambda' [varargslist] ':' test lambdef: 'lambda' [varargslist] ':' test
lambdef_nocond: 'lambda' [varargslist] ':' test_nocond
or_test: and_test ('or' and_test)* or_test: and_test ('or' and_test)*
and_test: not_test ('and' not_test)* and_test: not_test ('and' not_test)*
not_test: 'not' not_test | comparison not_test: 'not' not_test | comparison
@@ -155,7 +153,7 @@ argument: ( test [comp_for] |
comp_iter: comp_for | comp_if comp_iter: comp_for | comp_if
sync_comp_for: 'for' exprlist 'in' or_test [comp_iter] sync_comp_for: 'for' exprlist 'in' or_test [comp_iter]
comp_for: ['async'] sync_comp_for comp_for: ['async'] sync_comp_for
comp_if: 'if' test_nocond [comp_iter] comp_if: 'if' or_test [comp_iter]
# not used in grammar, but may appear in "node" passed from Parser to Compiler # not used in grammar, but may appear in "node" passed from Parser to Compiler
encoding_decl: NAME encoding_decl: NAME

11
test/test_python_errors.py
View File

@@ -494,3 +494,14 @@ def test_valid_empty_assignment(code):
) )
def test_valid_del(code): def test_valid_del(code):
assert not _get_error_list(code) assert not _get_error_list(code)
@pytest.mark.parametrize(
('source', 'version', 'no_errors'), [
('[x for x in range(10) if lambda: 1]', '3.8', True),
('[x for x in range(10) if lambda: 1]', '3.9', False),
('[x for x in range(10) if (lambda: 1)]', '3.9', True),
]
)
def test_lambda_in_comp_if(source, version, no_errors):
assert bool(_get_error_list(source, version=version)) ^ no_errors