[`ruff`] Extend FA102 with listed PEP 585-compatible APIs (#20659)

Resolves https://github.com/astral-sh/ruff/issues/20512

This PR expands FA102’s preview coverage to flag every
PEP 585-compatible API that breaks without from `from __future__ import
annotations`, including `collections.abc`. The rule now treats asyncio
futures, pathlib-style queues, weakref containers, shelve proxies, and
the full `collections.abc` family as generics once preview mode is
enabled.

Stable behavior is unchanged; the broader matching runs behind
`is_future_required_preview_generics_enabled`, letting us vet the new
diagnostics before marking them as stable.

I've also added a snapshot test that covers all of the newly supported
types.

Check out
https://docs.python.org/3/library/stdtypes.html#standard-generic-classes
for a list of commonly used PEP 585-compatible APIs.

crates/ruff_linter/resources/test/fixtures/flake8_future_annotations/no_future_import_uses_preview_generics.py

@@ -0,0 +1,91 @@
+import asyncio
+import collections
+import contextlib
+import dataclasses
+import functools
+import os
+import queue
+import re
+import shelve
+import types
+import weakref
+from collections.abc import (
+    AsyncGenerator,
+    AsyncIterable,
+    AsyncIterator,
+    Awaitable,
+    ByteString,
+    Callable,
+    Collection,
+    Container,
+    Coroutine,
+    Generator,
+    Iterable,
+    Iterator,
+    ItemsView,
+    KeysView,
+    Mapping,
+    MappingView,
+    MutableMapping,
+    MutableSequence,
+    MutableSet,
+    Reversible,
+    Sequence,
+    Set,
+    ValuesView,
+)
+
+
+def takes_preview_generics(
+    future: asyncio.Future[int],
+    task: asyncio.Task[str],
+    deque_object: collections.deque[int],
+    defaultdict_object: collections.defaultdict[str, int],
+    ordered_dict: collections.OrderedDict[str, int],
+    counter_obj: collections.Counter[str],
+    chain_map: collections.ChainMap[str, int],
+    context_manager: contextlib.AbstractContextManager[str],
+    async_context_manager: contextlib.AbstractAsyncContextManager[int],
+    dataclass_field: dataclasses.Field[int],
+    cached_prop: functools.cached_property[int],
+    partial_method: functools.partialmethod[int],
+    path_like: os.PathLike[str],
+    lifo_queue: queue.LifoQueue[int],
+    regular_queue: queue.Queue[int],
+    priority_queue: queue.PriorityQueue[int],
+    simple_queue: queue.SimpleQueue[int],
+    regex_pattern: re.Pattern[str],
+    regex_match: re.Match[str],
+    bsd_db_shelf: shelve.BsdDbShelf[str, int],
+    db_filename_shelf: shelve.DbfilenameShelf[str, int],
+    shelf_obj: shelve.Shelf[str, int],
+    mapping_proxy: types.MappingProxyType[str, int],
+    weak_key_dict: weakref.WeakKeyDictionary[object, int],
+    weak_method: weakref.WeakMethod[int],
+    weak_set: weakref.WeakSet[int],
+    weak_value_dict: weakref.WeakValueDictionary[object, int],
+    awaitable: Awaitable[int],
+    coroutine: Coroutine[int, None, str],
+    async_iterable: AsyncIterable[int],
+    async_iterator: AsyncIterator[int],
+    async_generator: AsyncGenerator[int, None],
+    iterable: Iterable[int],
+    iterator: Iterator[int],
+    generator: Generator[int, None, None],
+    reversible: Reversible[int],
+    container: Container[int],
+    collection: Collection[int],
+    callable_obj: Callable[[int], str],
+    set_obj: Set[int],
+    mutable_set: MutableSet[int],
+    mapping: Mapping[str, int],
+    mutable_mapping: MutableMapping[str, int],
+    sequence: Sequence[int],
+    mutable_sequence: MutableSequence[int],
+    byte_string: ByteString[int],
+    mapping_view: MappingView[str, int],
+    keys_view: KeysView[str],
+    items_view: ItemsView[str, int],
+    values_view: ValuesView[int],
+) -> None:
+    ...

crates/ruff_linter/src/checkers/ast/analyze/expression.rs

@@ -8,7 +8,8 @@ use ruff_text_size::Ranged;
 
 use crate::checkers::ast::Checker;
 use crate::preview::{
-    is_optional_as_none_in_union_enabled, is_unnecessary_default_type_args_stubs_enabled,
+    is_future_required_preview_generics_enabled, is_optional_as_none_in_union_enabled,
+    is_unnecessary_default_type_args_stubs_enabled,
 };
 use crate::registry::Rule;
 use crate::rules::{
@@ -69,7 +70,11 @@ pub(crate) fn expression(expr: &Expr, checker: &Checker) {
                     && checker.semantic.in_annotation()
                     && checker.semantic.in_runtime_evaluated_annotation()
                     && !checker.semantic.in_string_type_definition()
-                    && typing::is_pep585_generic(value, &checker.semantic)
+                    && typing::is_pep585_generic(
+                        value,
+                        &checker.semantic,
+                        is_future_required_preview_generics_enabled(checker.settings()),
+                    )
                 {
                     flake8_future_annotations::rules::future_required_type_annotation(
                         checker,

crates/ruff_linter/src/preview.rs

@@ -200,6 +200,11 @@ pub(crate) const fn is_optional_as_none_in_union_enabled(settings: &LinterSettin
     settings.preview.is_enabled()
 }
 
+// https://github.com/astral-sh/ruff/pull/20659
+pub(crate) const fn is_future_required_preview_generics_enabled(settings: &LinterSettings) -> bool {
+    settings.preview.is_enabled()
+}
+
 // https://github.com/astral-sh/ruff/pull/18683
 pub(crate) const fn is_safe_super_call_with_parameters_fix_enabled(
     settings: &LinterSettings,

crates/ruff_linter/src/rules/flake8_future_annotations/mod.rs

@@ -9,6 +9,7 @@ mod tests {
     use test_case::test_case;
 
     use crate::registry::Rule;
+    use crate::settings::types::PreviewMode;
     use crate::test::test_path;
     use crate::{assert_diagnostics, settings};
     use ruff_python_ast::PythonVersion;
@@ -39,6 +40,7 @@ mod tests {
     }
 
     #[test_case(Path::new("no_future_import_uses_lowercase.py"))]
+    #[test_case(Path::new("no_future_import_uses_preview_generics.py"))]
     #[test_case(Path::new("no_future_import_uses_union.py"))]
     #[test_case(Path::new("no_future_import_uses_union_inner.py"))]
     #[test_case(Path::new("ok_no_types.py"))]
@@ -56,4 +58,19 @@ mod tests {
         assert_diagnostics!(snapshot, diagnostics);
         Ok(())
     }
+
+    #[test_case(Path::new("no_future_import_uses_preview_generics.py"))]
+    fn fa102_preview(path: &Path) -> Result<()> {
+        let snapshot = format!("fa102_preview_{}", path.to_string_lossy());
+        let diagnostics = test_path(
+            Path::new("flake8_future_annotations").join(path).as_path(),
+            &settings::LinterSettings {
+                unresolved_target_version: PythonVersion::PY37.into(),
+                preview: PreviewMode::Enabled,
+                ..settings::LinterSettings::for_rule(Rule::FutureRequiredTypeAnnotation)
+            },
+        )?;
+        assert_diagnostics!(snapshot, diagnostics);
+        Ok(())
+    }
 }

crates/ruff_linter/src/rules/flake8_future_annotations/snapshots/ruff_linter__rules__flake8_future_annotations__tests__fa102_no_future_import_uses_preview_generics.py.snap

@@ -0,0 +1,36 @@
+---
+source: crates/ruff_linter/src/rules/flake8_future_annotations/mod.rs
+---
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:42:19
+   |
+40 |     future: asyncio.Future[int],
+41 |     task: asyncio.Task[str],
+42 |     deque_object: collections.deque[int],
+   |                   ^^^^^^^^^^^^^^^^^^^^^^
+43 |     defaultdict_object: collections.defaultdict[str, int],
+44 |     ordered_dict: collections.OrderedDict[str, int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:43:25
+   |
+41 |     task: asyncio.Task[str],
+42 |     deque_object: collections.deque[int],
+43 |     defaultdict_object: collections.defaultdict[str, int],
+   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+44 |     ordered_dict: collections.OrderedDict[str, int],
+45 |     counter_obj: collections.Counter[str],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior

crates/ruff_linter/src/rules/flake8_future_annotations/snapshots/ruff_linter__rules__flake8_future_annotations__tests__fa102_preview_no_future_import_uses_preview_generics.py.snap

@@ -0,0 +1,851 @@
+---
+source: crates/ruff_linter/src/rules/flake8_future_annotations/mod.rs
+---
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:40:13
+   |
+39 | def takes_preview_generics(
+40 |     future: asyncio.Future[int],
+   |             ^^^^^^^^^^^^^^^^^^^
+41 |     task: asyncio.Task[str],
+42 |     deque_object: collections.deque[int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:41:11
+   |
+39 | def takes_preview_generics(
+40 |     future: asyncio.Future[int],
+41 |     task: asyncio.Task[str],
+   |           ^^^^^^^^^^^^^^^^^
+42 |     deque_object: collections.deque[int],
+43 |     defaultdict_object: collections.defaultdict[str, int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:42:19
+   |
+40 |     future: asyncio.Future[int],
+41 |     task: asyncio.Task[str],
+42 |     deque_object: collections.deque[int],
+   |                   ^^^^^^^^^^^^^^^^^^^^^^
+43 |     defaultdict_object: collections.defaultdict[str, int],
+44 |     ordered_dict: collections.OrderedDict[str, int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:43:25
+   |
+41 |     task: asyncio.Task[str],
+42 |     deque_object: collections.deque[int],
+43 |     defaultdict_object: collections.defaultdict[str, int],
+   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+44 |     ordered_dict: collections.OrderedDict[str, int],
+45 |     counter_obj: collections.Counter[str],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:44:19
+   |
+42 |     deque_object: collections.deque[int],
+43 |     defaultdict_object: collections.defaultdict[str, int],
+44 |     ordered_dict: collections.OrderedDict[str, int],
+   |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+45 |     counter_obj: collections.Counter[str],
+46 |     chain_map: collections.ChainMap[str, int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:45:18
+   |
+43 |     defaultdict_object: collections.defaultdict[str, int],
+44 |     ordered_dict: collections.OrderedDict[str, int],
+45 |     counter_obj: collections.Counter[str],
+   |                  ^^^^^^^^^^^^^^^^^^^^^^^^
+46 |     chain_map: collections.ChainMap[str, int],
+47 |     context_manager: contextlib.AbstractContextManager[str],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:46:16
+   |
+44 |     ordered_dict: collections.OrderedDict[str, int],
+45 |     counter_obj: collections.Counter[str],
+46 |     chain_map: collections.ChainMap[str, int],
+   |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+47 |     context_manager: contextlib.AbstractContextManager[str],
+48 |     async_context_manager: contextlib.AbstractAsyncContextManager[int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:47:22
+   |
+45 |     counter_obj: collections.Counter[str],
+46 |     chain_map: collections.ChainMap[str, int],
+47 |     context_manager: contextlib.AbstractContextManager[str],
+   |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+48 |     async_context_manager: contextlib.AbstractAsyncContextManager[int],
+49 |     dataclass_field: dataclasses.Field[int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:48:28
+   |
+46 |     chain_map: collections.ChainMap[str, int],
+47 |     context_manager: contextlib.AbstractContextManager[str],
+48 |     async_context_manager: contextlib.AbstractAsyncContextManager[int],
+   |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+49 |     dataclass_field: dataclasses.Field[int],
+50 |     cached_prop: functools.cached_property[int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:49:22
+   |
+47 |     context_manager: contextlib.AbstractContextManager[str],
+48 |     async_context_manager: contextlib.AbstractAsyncContextManager[int],
+49 |     dataclass_field: dataclasses.Field[int],
+   |                      ^^^^^^^^^^^^^^^^^^^^^^
+50 |     cached_prop: functools.cached_property[int],
+51 |     partial_method: functools.partialmethod[int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:50:18
+   |
+48 |     async_context_manager: contextlib.AbstractAsyncContextManager[int],
+49 |     dataclass_field: dataclasses.Field[int],
+50 |     cached_prop: functools.cached_property[int],
+   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+51 |     partial_method: functools.partialmethod[int],
+52 |     path_like: os.PathLike[str],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:51:21
+   |
+49 |     dataclass_field: dataclasses.Field[int],
+50 |     cached_prop: functools.cached_property[int],
+51 |     partial_method: functools.partialmethod[int],
+   |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+52 |     path_like: os.PathLike[str],
+53 |     lifo_queue: queue.LifoQueue[int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:52:16
+   |
+50 |     cached_prop: functools.cached_property[int],
+51 |     partial_method: functools.partialmethod[int],
+52 |     path_like: os.PathLike[str],
+   |                ^^^^^^^^^^^^^^^^
+53 |     lifo_queue: queue.LifoQueue[int],
+54 |     regular_queue: queue.Queue[int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:53:17
+   |
+51 |     partial_method: functools.partialmethod[int],
+52 |     path_like: os.PathLike[str],
+53 |     lifo_queue: queue.LifoQueue[int],
+   |                 ^^^^^^^^^^^^^^^^^^^^
+54 |     regular_queue: queue.Queue[int],
+55 |     priority_queue: queue.PriorityQueue[int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:54:20
+   |
+52 |     path_like: os.PathLike[str],
+53 |     lifo_queue: queue.LifoQueue[int],
+54 |     regular_queue: queue.Queue[int],
+   |                    ^^^^^^^^^^^^^^^^
+55 |     priority_queue: queue.PriorityQueue[int],
+56 |     simple_queue: queue.SimpleQueue[int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:55:21
+   |
+53 |     lifo_queue: queue.LifoQueue[int],
+54 |     regular_queue: queue.Queue[int],
+55 |     priority_queue: queue.PriorityQueue[int],
+   |                     ^^^^^^^^^^^^^^^^^^^^^^^^
+56 |     simple_queue: queue.SimpleQueue[int],
+57 |     regex_pattern: re.Pattern[str],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:56:19
+   |
+54 |     regular_queue: queue.Queue[int],
+55 |     priority_queue: queue.PriorityQueue[int],
+56 |     simple_queue: queue.SimpleQueue[int],
+   |                   ^^^^^^^^^^^^^^^^^^^^^^
+57 |     regex_pattern: re.Pattern[str],
+58 |     regex_match: re.Match[str],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:57:20
+   |
+55 |     priority_queue: queue.PriorityQueue[int],
+56 |     simple_queue: queue.SimpleQueue[int],
+57 |     regex_pattern: re.Pattern[str],
+   |                    ^^^^^^^^^^^^^^^
+58 |     regex_match: re.Match[str],
+59 |     bsd_db_shelf: shelve.BsdDbShelf[str, int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:58:18
+   |
+56 |     simple_queue: queue.SimpleQueue[int],
+57 |     regex_pattern: re.Pattern[str],
+58 |     regex_match: re.Match[str],
+   |                  ^^^^^^^^^^^^^
+59 |     bsd_db_shelf: shelve.BsdDbShelf[str, int],
+60 |     db_filename_shelf: shelve.DbfilenameShelf[str, int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:59:19
+   |
+57 |     regex_pattern: re.Pattern[str],
+58 |     regex_match: re.Match[str],
+59 |     bsd_db_shelf: shelve.BsdDbShelf[str, int],
+   |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^
+60 |     db_filename_shelf: shelve.DbfilenameShelf[str, int],
+61 |     shelf_obj: shelve.Shelf[str, int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:60:24
+   |
+58 |     regex_match: re.Match[str],
+59 |     bsd_db_shelf: shelve.BsdDbShelf[str, int],
+60 |     db_filename_shelf: shelve.DbfilenameShelf[str, int],
+   |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+61 |     shelf_obj: shelve.Shelf[str, int],
+62 |     mapping_proxy: types.MappingProxyType[str, int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:61:16
+   |
+59 |     bsd_db_shelf: shelve.BsdDbShelf[str, int],
+60 |     db_filename_shelf: shelve.DbfilenameShelf[str, int],
+61 |     shelf_obj: shelve.Shelf[str, int],
+   |                ^^^^^^^^^^^^^^^^^^^^^^
+62 |     mapping_proxy: types.MappingProxyType[str, int],
+63 |     weak_key_dict: weakref.WeakKeyDictionary[object, int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:62:20
+   |
+60 |     db_filename_shelf: shelve.DbfilenameShelf[str, int],
+61 |     shelf_obj: shelve.Shelf[str, int],
+62 |     mapping_proxy: types.MappingProxyType[str, int],
+   |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+63 |     weak_key_dict: weakref.WeakKeyDictionary[object, int],
+64 |     weak_method: weakref.WeakMethod[int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:63:20
+   |
+61 |     shelf_obj: shelve.Shelf[str, int],
+62 |     mapping_proxy: types.MappingProxyType[str, int],
+63 |     weak_key_dict: weakref.WeakKeyDictionary[object, int],
+   |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+64 |     weak_method: weakref.WeakMethod[int],
+65 |     weak_set: weakref.WeakSet[int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:64:18
+   |
+62 |     mapping_proxy: types.MappingProxyType[str, int],
+63 |     weak_key_dict: weakref.WeakKeyDictionary[object, int],
+64 |     weak_method: weakref.WeakMethod[int],
+   |                  ^^^^^^^^^^^^^^^^^^^^^^^
+65 |     weak_set: weakref.WeakSet[int],
+66 |     weak_value_dict: weakref.WeakValueDictionary[object, int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:65:15
+   |
+63 |     weak_key_dict: weakref.WeakKeyDictionary[object, int],
+64 |     weak_method: weakref.WeakMethod[int],
+65 |     weak_set: weakref.WeakSet[int],
+   |               ^^^^^^^^^^^^^^^^^^^^
+66 |     weak_value_dict: weakref.WeakValueDictionary[object, int],
+67 |     awaitable: Awaitable[int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:66:22
+   |
+64 |     weak_method: weakref.WeakMethod[int],
+65 |     weak_set: weakref.WeakSet[int],
+66 |     weak_value_dict: weakref.WeakValueDictionary[object, int],
+   |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+67 |     awaitable: Awaitable[int],
+68 |     coroutine: Coroutine[int, None, str],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:67:16
+   |
+65 |     weak_set: weakref.WeakSet[int],
+66 |     weak_value_dict: weakref.WeakValueDictionary[object, int],
+67 |     awaitable: Awaitable[int],
+   |                ^^^^^^^^^^^^^^
+68 |     coroutine: Coroutine[int, None, str],
+69 |     async_iterable: AsyncIterable[int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:68:16
+   |
+66 |     weak_value_dict: weakref.WeakValueDictionary[object, int],
+67 |     awaitable: Awaitable[int],
+68 |     coroutine: Coroutine[int, None, str],
+   |                ^^^^^^^^^^^^^^^^^^^^^^^^^
+69 |     async_iterable: AsyncIterable[int],
+70 |     async_iterator: AsyncIterator[int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:69:21
+   |
+67 |     awaitable: Awaitable[int],
+68 |     coroutine: Coroutine[int, None, str],
+69 |     async_iterable: AsyncIterable[int],
+   |                     ^^^^^^^^^^^^^^^^^^
+70 |     async_iterator: AsyncIterator[int],
+71 |     async_generator: AsyncGenerator[int, None],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:70:21
+   |
+68 |     coroutine: Coroutine[int, None, str],
+69 |     async_iterable: AsyncIterable[int],
+70 |     async_iterator: AsyncIterator[int],
+   |                     ^^^^^^^^^^^^^^^^^^
+71 |     async_generator: AsyncGenerator[int, None],
+72 |     iterable: Iterable[int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:71:22
+   |
+69 |     async_iterable: AsyncIterable[int],
+70 |     async_iterator: AsyncIterator[int],
+71 |     async_generator: AsyncGenerator[int, None],
+   |                      ^^^^^^^^^^^^^^^^^^^^^^^^^
+72 |     iterable: Iterable[int],
+73 |     iterator: Iterator[int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:72:15
+   |
+70 |     async_iterator: AsyncIterator[int],
+71 |     async_generator: AsyncGenerator[int, None],
+72 |     iterable: Iterable[int],
+   |               ^^^^^^^^^^^^^
+73 |     iterator: Iterator[int],
+74 |     generator: Generator[int, None, None],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:73:15
+   |
+71 |     async_generator: AsyncGenerator[int, None],
+72 |     iterable: Iterable[int],
+73 |     iterator: Iterator[int],
+   |               ^^^^^^^^^^^^^
+74 |     generator: Generator[int, None, None],
+75 |     reversible: Reversible[int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:74:16
+   |
+72 |     iterable: Iterable[int],
+73 |     iterator: Iterator[int],
+74 |     generator: Generator[int, None, None],
+   |                ^^^^^^^^^^^^^^^^^^^^^^^^^^
+75 |     reversible: Reversible[int],
+76 |     container: Container[int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:75:17
+   |
+73 |     iterator: Iterator[int],
+74 |     generator: Generator[int, None, None],
+75 |     reversible: Reversible[int],
+   |                 ^^^^^^^^^^^^^^^
+76 |     container: Container[int],
+77 |     collection: Collection[int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:76:16
+   |
+74 |     generator: Generator[int, None, None],
+75 |     reversible: Reversible[int],
+76 |     container: Container[int],
+   |                ^^^^^^^^^^^^^^
+77 |     collection: Collection[int],
+78 |     callable_obj: Callable[[int], str],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:77:17
+   |
+75 |     reversible: Reversible[int],
+76 |     container: Container[int],
+77 |     collection: Collection[int],
+   |                 ^^^^^^^^^^^^^^^
+78 |     callable_obj: Callable[[int], str],
+79 |     set_obj: Set[int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:78:19
+   |
+76 |     container: Container[int],
+77 |     collection: Collection[int],
+78 |     callable_obj: Callable[[int], str],
+   |                   ^^^^^^^^^^^^^^^^^^^^
+79 |     set_obj: Set[int],
+80 |     mutable_set: MutableSet[int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:79:14
+   |
+77 |     collection: Collection[int],
+78 |     callable_obj: Callable[[int], str],
+79 |     set_obj: Set[int],
+   |              ^^^^^^^^
+80 |     mutable_set: MutableSet[int],
+81 |     mapping: Mapping[str, int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:80:18
+   |
+78 |     callable_obj: Callable[[int], str],
+79 |     set_obj: Set[int],
+80 |     mutable_set: MutableSet[int],
+   |                  ^^^^^^^^^^^^^^^
+81 |     mapping: Mapping[str, int],
+82 |     mutable_mapping: MutableMapping[str, int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:81:14
+   |
+79 |     set_obj: Set[int],
+80 |     mutable_set: MutableSet[int],
+81 |     mapping: Mapping[str, int],
+   |              ^^^^^^^^^^^^^^^^^
+82 |     mutable_mapping: MutableMapping[str, int],
+83 |     sequence: Sequence[int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:82:22
+   |
+80 |     mutable_set: MutableSet[int],
+81 |     mapping: Mapping[str, int],
+82 |     mutable_mapping: MutableMapping[str, int],
+   |                      ^^^^^^^^^^^^^^^^^^^^^^^^
+83 |     sequence: Sequence[int],
+84 |     mutable_sequence: MutableSequence[int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:83:15
+   |
+81 |     mapping: Mapping[str, int],
+82 |     mutable_mapping: MutableMapping[str, int],
+83 |     sequence: Sequence[int],
+   |               ^^^^^^^^^^^^^
+84 |     mutable_sequence: MutableSequence[int],
+85 |     byte_string: ByteString[int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:84:23
+   |
+82 |     mutable_mapping: MutableMapping[str, int],
+83 |     sequence: Sequence[int],
+84 |     mutable_sequence: MutableSequence[int],
+   |                       ^^^^^^^^^^^^^^^^^^^^
+85 |     byte_string: ByteString[int],
+86 |     mapping_view: MappingView[str, int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:85:18
+   |
+83 |     sequence: Sequence[int],
+84 |     mutable_sequence: MutableSequence[int],
+85 |     byte_string: ByteString[int],
+   |                  ^^^^^^^^^^^^^^^
+86 |     mapping_view: MappingView[str, int],
+87 |     keys_view: KeysView[str],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:86:19
+   |
+84 |     mutable_sequence: MutableSequence[int],
+85 |     byte_string: ByteString[int],
+86 |     mapping_view: MappingView[str, int],
+   |                   ^^^^^^^^^^^^^^^^^^^^^
+87 |     keys_view: KeysView[str],
+88 |     items_view: ItemsView[str, int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:87:16
+   |
+85 |     byte_string: ByteString[int],
+86 |     mapping_view: MappingView[str, int],
+87 |     keys_view: KeysView[str],
+   |                ^^^^^^^^^^^^^
+88 |     items_view: ItemsView[str, int],
+89 |     values_view: ValuesView[int],
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:88:17
+   |
+86 |     mapping_view: MappingView[str, int],
+87 |     keys_view: KeysView[str],
+88 |     items_view: ItemsView[str, int],
+   |                 ^^^^^^^^^^^^^^^^^^^
+89 |     values_view: ValuesView[int],
+90 | ) -> None:
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior
+
+FA102 [*] Missing `from __future__ import annotations`, but uses PEP 585 collection
+  --> no_future_import_uses_preview_generics.py:89:18
+   |
+87 |     keys_view: KeysView[str],
+88 |     items_view: ItemsView[str, int],
+89 |     values_view: ValuesView[int],
+   |                  ^^^^^^^^^^^^^^^
+90 | ) -> None:
+91 |     ...
+   |
+help: Add `from __future__ import annotations`
+1 + from __future__ import annotations
+2 | import asyncio
+3 | import collections
+4 | import contextlib
+note: This is an unsafe fix and may change runtime behavior

crates/ruff_python_semantic/src/analyze/typing.rs

@@ -8,11 +8,10 @@ use ruff_python_ast::{
     StmtAssign,
 };
 use ruff_python_stdlib::typing::{
-    as_pep_585_generic, has_pep_585_generic, is_immutable_generic_type,
-    is_immutable_non_generic_type, is_immutable_return_type, is_literal_member,
-    is_mutable_return_type, is_pep_593_generic_member, is_pep_593_generic_type,
-    is_standard_library_generic, is_standard_library_generic_member, is_standard_library_literal,
-    is_typed_dict, is_typed_dict_member,
+    as_pep_585_generic, is_immutable_generic_type, is_immutable_non_generic_type,
+    is_immutable_return_type, is_literal_member, is_mutable_return_type, is_pep_593_generic_member,
+    is_pep_593_generic_type, is_standard_library_generic, is_standard_library_generic_member,
+    is_standard_library_literal, is_typed_dict, is_typed_dict_member,
 };
 use ruff_text_size::Ranged;
 use smallvec::{SmallVec, smallvec};
@@ -148,14 +147,46 @@ pub fn to_pep585_generic(expr: &Expr, semantic: &SemanticModel) -> Option<Module
 }
 
 /// Return whether a given expression uses a PEP 585 standard library generic.
-pub fn is_pep585_generic(expr: &Expr, semantic: &SemanticModel) -> bool {
+pub fn is_pep585_generic(
+    expr: &Expr,
+    semantic: &SemanticModel,
+    include_preview_generics: bool,
+) -> bool {
     semantic
         .resolve_qualified_name(expr)
-        .is_some_and(|qualified_name| {
-            let [module, name] = qualified_name.segments() else {
-                return false;
-            };
-            has_pep_585_generic(module, name)
+        .is_some_and(|qualified_name| match qualified_name.segments() {
+            ["", "dict" | "frozenset" | "list" | "set" | "tuple" | "type"]
+            | ["collections", "deque" | "defaultdict"] => true,
+            ["asyncio", "Future" | "Task"]
+            | ["collections", "ChainMap" | "Counter" | "OrderedDict"]
+            | [
+                "contextlib",
+                "AbstractAsyncContextManager" | "AbstractContextManager",
+            ]
+            | ["dataclasses", "Field"]
+            | ["functools", "cached_property" | "partialmethod"]
+            | ["os", "PathLike"]
+            | [
+                "queue",
+                "LifoQueue" | "PriorityQueue" | "Queue" | "SimpleQueue",
+            ]
+            | ["re", "Match" | "Pattern"]
+            | ["shelve", "BsdDbShelf" | "DbfilenameShelf" | "Shelf"]
+            | ["types", "MappingProxyType"]
+            | [
+                "weakref",
+                "WeakKeyDictionary" | "WeakMethod" | "WeakSet" | "WeakValueDictionary",
+            ]
+            | [
+                "collections",
+                "abc",
+                "AsyncGenerator" | "AsyncIterable" | "AsyncIterator" | "Awaitable" | "ByteString"
+                | "Callable" | "Collection" | "Container" | "Coroutine" | "Generator" | "ItemsView"
+                | "Iterable" | "Iterator" | "KeysView" | "Mapping" | "MappingView"
+                | "MutableMapping" | "MutableSequence" | "MutableSet" | "Reversible" | "Sequence"
+                | "Set" | "ValuesView",
+            ] => include_preview_generics,
+            _ => false,
         })
 }
 

crates/ruff_python_stdlib/src/typing.rs

@@ -354,20 +354,6 @@ pub fn as_pep_585_generic(module: &str, member: &str) -> Option<ModuleMember> {
     }
 }
 
-/// Given a typing member, returns `true` if a generic equivalent exists in the Python standard
-/// library (e.g., `list` for `typing.List`), as introduced by [PEP 585].
-///
-/// [PEP 585]: https://peps.python.org/pep-0585/
-pub fn has_pep_585_generic(module: &str, member: &str) -> bool {
-    // Constructed by taking every pattern from `as_pep_585_generic`, removing all but
-    // the last element in each pattern, and de-duplicating the values.
-    matches!(
-        (module, member),
-        ("", "dict" | "frozenset" | "list" | "set" | "tuple" | "type")
-            | ("collections", "deque" | "defaultdict")
-    )
-}
-
 /// Returns the expected return type for a magic method.
 ///
 /// See: <https://github.com/JelleZijlstra/autotyping/blob/0adba5ba0eee33c1de4ad9d0c79acfd737321dd9/autotyping/autotyping.py#L69-L91>