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ruff/crates/ty_python_semantic/resources/mdtest
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Douglas Creager e867830848
[ty] Don't include already-bound legacy typevars in function generic context (#19558) 
We now correctly exclude legacy typevars from enclosing scopes when
constructing the generic context for a generic function.

more detail:

A function is generic if it refers to legacy typevars in its signature:

```py
from typing import TypeVar

T = TypeVar("T")

def f(t: T) -> T:
    return t
```

Generic functions are allowed to appear inside of other generic
contexts. When they do, they can refer to the typevars of those
enclosing generic contexts, and that should not rebind the typevar:

```py
from typing import TypeVar, Generic

T = TypeVar("T")
U = TypeVar("U")

class C(Generic[T]):
    @staticmethod
    def method(t: T, u: U) -> None: ...

# revealed: def method(t: int, u: U) -> None
reveal_type(C[int].method)
```

This substitution was already being performed correctly, but we were
also still including the enclosing legacy typevars in the method's own
generic context, which can be seen via `ty_extensions.generic_context`
(which has been updated to work on generic functions and methods):

```py
from ty_extensions import generic_context

# before: tuple[T, U]
# after: tuple[U]
reveal_type(generic_context(C[int].method))
```

---------

Co-authored-by: Carl Meyer <carl@astral.sh>
Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
 		2025-07-25 18:14:19 -04:00
..
annotations [ty] Fallback to Unknown if no type is stored for an expression (#19517) 2025-07-25 02:05:32 +00:00
assignment [ty] Homogeneous and mixed tuples (#18600) 2025-06-20 18:23:54 -04:00
binary [ty] Homogeneous and mixed tuples (#18600) 2025-06-20 18:23:54 -04:00
boolean Revert "[ty] Better control flow for boolean expressions that are inside if (#18010)" (#18150) 2025-05-17 08:27:32 -04:00
boundness_declaredness Update class literal display to use `<class 'Foo'>` style (#17889) 2025-05-06 20:11:25 -04:00
call [ty] Rename type_api => ty_extensions (#19523) 2025-07-24 08:24:26 +00:00
class Update class literal display to use `<class 'Foo'>` style (#17889) 2025-05-06 20:11:25 -04:00
comparison [ty] Enum literal types (#19328) 2025-07-15 21:31:53 +02:00
comprehensions Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
conditional [ty] Exhaustiveness checking & reachability for `match` statements (#19508) 2025-07-23 22:45:45 +02:00
dataclasses [ty] Add basic support for `dataclasses.field` (#19553) 2025-07-25 14:56:04 +02:00
declaration [ty] Format conflicting types as an enumeration (#18956) 2025-06-26 14:29:33 +02:00
diagnostics lint on the `global` keyword if there's no explicit definition in the global scope 2025-07-15 16:56:54 -07:00
directives [ty] Exhaustiveness checking & reachability for `match` statements (#19508) 2025-07-23 22:45:45 +02:00
doc ty_python_semantic: add union type context to function call type errors 2025-05-09 13:40:51 -04:00
exception [ty] support del statement and deletion of except handler names (#18593) 2025-06-12 07:44:42 -07:00
expression [ty] Make tuple subclass constructors sound (#19469) 2025-07-21 21:25:11 +00:00
function [ty] Support empty function bodies in `if TYPE_CHECKING` blocks (#19372) 2025-07-16 14:48:04 -06:00
generics [ty] Don't include already-bound legacy typevars in function generic context (#19558) 2025-07-25 18:14:19 -04:00
ide_support [ty] Enum literal types (#19328) 2025-07-15 21:31:53 +02:00
import lint on the `global` keyword if there's no explicit definition in the global scope 2025-07-15 16:56:54 -07:00
literal [ty] Understand classes that inherit from subscripted `Protocol[]` as generic (#17832) 2025-05-09 17:39:15 +01:00
loops [ty] Do not consider a type `T` to satisfy a method member on a protocol unless the method is available on the meta-type of `T` (#19187) 2025-07-25 11:16:04 +01:00
narrow [ty] Attribute access on intersections with negative parts (#19524) 2025-07-25 14:56:14 +02:00
regression Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
scopes [ty] improve lazy scope place lookup (#19321) 2025-07-25 07:11:11 +00:00
shadowing Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
snapshots [ty] Rename type_api => ty_extensions (#19523) 2025-07-24 08:24:26 +00:00
stubs [ty] Do not carry the generic context of `Protocol` or `Generic` in the `ClassBase` enum (#17989) 2025-05-22 21:37:03 -04:00
subscript [ty] Fix false positives when subscripting an object inferred as having an `Intersection` type (#18920) 2025-06-24 18:39:02 +00:00
suppressions [ty] Consistent use of American english (in rules) (#19488) 2025-07-22 16:10:38 +02:00
type_compendium [ty] Make tuple subclass constructors sound (#19469) 2025-07-21 21:25:11 +00:00
type_of [ty] Enum literal types (#19328) 2025-07-15 21:31:53 +02:00
type_properties [ty] Infer single-valuedness for enums based on `int`/`str` (#19510) 2025-07-23 15:55:42 +02:00
type_qualifiers [ty] Support `dataclasses.InitVar` (#19527) 2025-07-24 16:33:33 +02:00
unary Update class literal display to use `<class 'Foo'>` style (#17889) 2025-05-06 20:11:25 -04:00
with [ty] Add hint if async context manager is used in non-async with statement (#18299) 2025-05-26 21:34:47 +02:00
.mdformat.toml Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
attributes.md [ty] Attribute access on intersections with negative parts (#19524) 2025-07-25 14:56:14 +02:00
cycle.md [ty] Add cycle handling for unpacking targets (#18078) 2025-05-13 21:27:48 +00:00
decorators.md ty_python_semantic: add union type context to function call type errors 2025-05-09 13:40:51 -04:00
del.md [ty] improve lazy scope place lookup (#19321) 2025-07-25 07:11:11 +00:00
deprecated.md [ty] Consistent use of American english (in rules) (#19488) 2025-07-22 16:10:38 +02:00
descriptor_protocol.md [ty] Fix descriptor lookups for most types that overlap with `None` (#19120) 2025-07-05 19:34:23 +01:00
enums.md [ty] Exhaustiveness checking & reachability for `match` statements (#19508) 2025-07-23 22:45:45 +02:00
exhaustiveness_checking.md [ty] Exhaustiveness checking & reachability for `match` statements (#19508) 2025-07-23 22:45:45 +02:00
final.md Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
instance_layout_conflict.md [ty] Improve disjointness inference for `NominalInstanceType`s and `SubclassOfType`s (#18864) 2025-06-24 20:27:37 +00:00
intersection_types.md [ty] Expansion of enums into unions of literals (#19382) 2025-07-21 19:37:55 +02:00
invalid_syntax.md Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
known_constants.md Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
mdtest_config.md Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
mdtest_custom_typeshed.md [ty] Fix duplicate diagnostics for unresolved module when an `import from` statement imports multiple members (#17886) 2025-05-06 12:37:10 +01:00
metaclass.md Update class literal display to use `<class 'Foo'>` style (#17889) 2025-05-06 20:11:25 -04:00
mro.md [ty] Implement implicit inheritance from `Generic[]` for PEP-695 generic classes (#18283) 2025-05-26 20:40:16 +01:00
named_tuple.md [ty] Add generic inference for dataclasses (#18443) 2025-06-03 09:59:43 -07:00
overloads.md [ty] Add support for `@staticmethod`s (#18809) 2025-06-20 10:38:17 +02:00
pep695_type_aliases.md [ty] Support `typing.TypeAliasType` (#18156) 2025-05-19 16:36:49 +02:00
properties.md ty_python_semantic: add union type context to function call type errors 2025-05-09 13:40:51 -04:00
protocols.md [ty] Attribute access on intersections with negative parts (#19524) 2025-07-25 14:56:14 +02:00
public_types.md [ty] improve lazy scope place lookup (#19321) 2025-07-25 07:11:11 +00:00
statically_known_branches.md [ty] Infer nonlocal types as unions of all reachable bindings (#18750) 2025-06-26 12:24:40 +02:00
sys_platform.md Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
sys_version_info.md Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
terminal_statements.md [ty] improve lazy scope place lookup (#19321) 2025-07-25 07:11:11 +00:00
ty_extensions.md [ty] Rename type_api => ty_extensions (#19523) 2025-07-24 08:24:26 +00:00
typed_dict.md [ty] Reduce false positives for `TypedDict` types (#19354) 2025-07-15 12:47:19 +01:00
union_types.md [ty] Expansion of enums into unions of literals (#19382) 2025-07-21 19:37:55 +02:00
unpacking.md [ty] Support variable-length tuples in unpacking assignments (#18948) 2025-06-27 15:29:04 -04:00
unreachable.md [ty] improve lazy scope place lookup (#19321) 2025-07-25 07:11:11 +00:00