8000 gh-109118: Make comprehensions work within annotation scopes, but without inlining by JelleZijlstra · Pull Request #118160 · python/cpython · GitHub
[go: up one dir, main page]
Skip to content

gh-109118: Make comprehensions work within annotation scopes, but without inlining #118160

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 7 commits into from
Apr 28, 2024
Merged

gh-109118: Make comprehensions work within annotation scopes, but without inlining #118160

Show file tree
Hide file tree
Changes from 1 commit
Commits
Show all changes
7 commits
Select commit Hold shift + click to select a range
ad56c5f
Desired behavior
JelleZijlstra Apr 18, 2024
5ade8d4
not correct
JelleZijlstra Apr 18, 2024
ba90c97
Revert "not correct"
JelleZijlstra Apr 26, 2024
28e78a6
Merge remote-tracking branch 'upstream/main' into lambdaanno
JelleZijlstra Apr 26, 2024
1a9b8ed
Do not inline them
JelleZijlstra Apr 26, 2024
79e9332
Rename "error_cases"
JelleZijlstra Apr 26, 2024
9e6ade7
Update Doc/whatsnew/3.13.rst
JelleZijlstra Apr 26, 2024
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
Next Next commit
Desired behavior
  • Loading branch information
@JelleZijlstra
JelleZijlstra committed Apr 22, 2024
commit ad56c5fbc2c598ead76bc9a1bbbd31b9287a193e
44 changes: 27 additions & 17 deletions Lib/test/test_type_params.py
View file
Open in desktop
DFA2
Original file line number Diff line number Diff line change
Expand Up @@ -436,9 +436,11 @@ class C[T]:
class Inner[U](make_base(T for _ in (1,)), make_base(T)):
pass
"""
with self.assertRaisesRegex(SyntaxError,
"Cannot use comprehension in annotation scope within class scope"):
run_code(code)
ns = run_code(code)
inner = ns["C"].Inner
base1, base2, _ = inner.__bases__
self.assertEqual(list(base1.__arg__), [ns["C"].__type_params__[0]])
self.assertEqual(base2.__arg__, "class")

def test_listcomp_in_nested_class(self):
code = """
Expand All @@ -464,9 +466,11 @@ class C[T]:
class Inner[U](make_base([T for _ in (1,)]), make_base(T)):
pass
"""
with self.assertRaisesRegex(SyntaxError,
"Cannot use comprehension in annotation scope within class scope"):
run_code(code)
ns = run_code(code)
inner = ns["C"].Inner
base1, base2, _ = inner.__bases__
self.assertEqual(base1.__arg__, [ns["C"].__type_params__[0]])
self.assertEqual(base2.__arg__, "class")

def test_gen_exp_in_generic_method(self):
code = """
Expand All @@ -475,27 +479,33 @@ class C[T]:
def meth[U](x: (T for _ in (1,)), y: T):
pass
"""
with self.assertRaisesRegex(SyntaxError,
"Cannot use comprehension in annotation scope within class scope"):
run_code(code)
ns = run_code(code)
meth = ns["C"].meth
self.assertEqual(list(meth.__annotations__["x"]), [ns["C"].__type_params__[0]])
self.assertEqual(meth.__annotations__["y"], "class")

def test_nested_scope_in_generic_alias(self):
code = """
class C[T]:
T = "global"
class C:
T = "class"
{}
"""
error_cases = [
"type Alias3[T] = (T for _ in (1,))",
"type Alias4 = (T for _ in (1,))",
"type Alias5[T] = [T for _ in (1,)]",
"type Alias6 = [T for _ in (1,)]",
"type Alias[T] = (T for _ in (1,))",
"type Alias = (T for _ in (1,))",
"type Alias[T] = [T for _ in (1,)]",
"type Alias = [T for _ in (1,)]",
]
for case in error_cases:
with self.subTest(case=case):
with self.assertRaisesRegex(SyntaxError,
r"Cannot use [a-z]+ in annotation scope within class scope"):
run_code(code.format(case))
ns = run_code(code.format(case))
alias = ns["C"].Alias
value = list(alias.__value__)[0]
if alias.__type_params__:
self.assertIs(value, alias.__type_params__[0])
else:
self.assertEqual(value, "global")

def test_lambda_in_alias_in_class(self):
code = """
Expand Down
12 changes: 0 additions & 12 deletions Python/symtable.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2589,18 +2589,6 @@ symtable_handle_comprehension(struct symtable *st, expr_ty e,
identifier scope_name, asdl_comprehension_seq *generators,
expr_ty elt, expr_ty value)
{
if (st->st_cur->ste_can_see_class_scope) {
// gh-109118
PyErr_Format(PyExc_SyntaxError,
"Cannot use comprehension in annotation scope within class scope");
PyErr_RangedSyntaxLocationObject(st->st_filename,
e->lineno,
e->col_offset + 1,
e->end_lineno,
e->end_col_offset + 1);
VISIT_QUIT(st, 0);
}

int is_generator = (e->kind == GeneratorExp_kind);
comprehension_ty outermost = ((comprehension_ty)
asdl_seq_GET(generators, 0));
Expand Down
0