Thanks to visit codestin.com
Credit goes to github.com

Skip to content

Prevent crash with Unpack of a fixed tuple in PEP695 type alias #18451

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 5 commits into from
Jan 15, 2025
Merged

Prevent crash with Unpack of a fixed tuple in PEP695 type alias #18451

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
5 commits
Select commit Hold shift + click to select a range
0ceb6ad
Do not call get_proper_type for traversing type alias: that creates a…
sterliakov Jan 12, 2025
7ed6d1b
Address what ilevkivskyi noticed: there's a missing traversal path
sterliakov Jan 14, 2025
aa00f07
Revert the previous attempt
sterliakov Jan 14, 2025
5bb7315
Merge remote-tracking branch 'upstream/master' into bugfix/st-type-al…
sterliakov Jan 14, 2025
79cbce7
Fix typing
sterliakov Jan 14, 2025
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
17 changes: 14 additions & 3 deletions mypy/mixedtraverser.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -10,7 +10,9 @@
NamedTupleExpr,
NewTypeExpr,
PromoteExpr,
TypeAlias,
TypeAliasExpr,
TypeAliasStmt,
TypeApplication,
TypedDictExpr,
TypeVarExpr,
Expand Down Expand Up @@ -48,9 +50,7 @@ def visit_class_def(self, o: ClassDef, /) -> None:

def visit_type_alias_expr(self, o: TypeAliasExpr, /) -> None:
super().visit_type_alias_expr(o)
self.in_type_alias_expr = True
o.node.target.accept(self)
self.in_type_alias_expr = False
o.node.accept(self)

def visit_type_var_expr(self, o: TypeVarExpr, /) -> None:
super().visit_type_var_expr(o)
Expand Down Expand Up @@ -81,6 +81,17 @@ def visit_assignment_stmt(self, o: AssignmentStmt, /) -> None:
super().visit_assignment_stmt(o)
self.visit_optional_type(o.type)

def visit_type_alias_stmt(self, o: TypeAliasStmt, /) -> None:
super().visit_type_alias_stmt(o)
if o.alias_node is not None:
o.alias_node.accept(self)

def visit_type_alias(self, o: TypeAlias, /) -> None:
super().visit_type_alias(o)
self.in_type_alias_expr = True
o.target.accept(self)
self.in_type_alias_expr = False

def visit_for_stmt(self, o: ForStmt, /) -> None:
super().visit_for_stmt(o)
self.visit_optional_type(o.index_type)
Expand Down
16 changes: 16 additions & 0 deletions test-data/unit/check-python312.test
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1972,3 +1972,19 @@ class D:
class G[Q]:
def g(self, x: Q): ...
d: G[str]

[case testTypeAliasNormalization]
from collections.abc import Callable
from typing import Unpack
from typing_extensions import TypeAlias

type RK_function_args = tuple[float, int]
type RK_functionBIS = Callable[[Unpack[RK_function_args], int], int]

def ff(a: float, b: int, c: int) -> int:
return 2

bis: RK_functionBIS = ff
res: int = bis(1.0, 2, 3)
[builtins fixtures/tuple.pyi]
[typing fixtures/typing-full.pyi]
Loading