Fix forwardref by making ProvideMultiple generic

src/dishka/dependency_source/make_factory.py

@@ -103,10 +103,10 @@ def _type_repr(hint: Any) -> str:
 
 
 def _async_generator_result(hint: Any) -> Any:
-    if isinstance(hint, ProvideMultiple):
-        return ProvideMultiple([
-            _async_generator_result(x) for x in hint.items
-        ])
+    if get_origin(hint) is ProvideMultiple:
+        return ProvideMultiple[tuple(  # type: ignore[misc]
+            _async_generator_result(x) for x in get_args(hint)
+        )]
     origin = get_origin(hint)
     if origin is AsyncIterable:
         return get_args(hint)[0]
@@ -136,10 +136,10 @@ def _async_generator_result(hint: Any) -> Any:
 
 
 def _generator_result(hint: Any) -> Any:
-    if isinstance(hint, ProvideMultiple):
-        return ProvideMultiple([
-            _generator_result(x) for x in hint.items
-        ])
+    if get_origin(hint) is ProvideMultiple:
+        return ProvideMultiple[tuple(  # type: ignore[misc]
+            _generator_result(x) for x in get_args(hint)
+        )]
     origin = get_origin(hint)
     if origin is Iterable:
         return get_args(hint)[0]

src/dishka/dependency_source/unpack_provides.py

@@ -1,4 +1,5 @@
 from collections.abc import Sequence
+from typing import get_args, get_origin
 
 from dishka.entities.key import DependencyKey
 from dishka.entities.provides_marker import ProvideMultiple
@@ -9,10 +10,10 @@
 
 
 def unpack_factory(factory: Factory) -> Sequence[DependencySource]:
-    if not isinstance(factory.provides.type_hint, ProvideMultiple):
+    if get_origin(factory.provides.type_hint) is not ProvideMultiple:
         return [factory]
 
-    provides_first, *provides_others = factory.provides.type_hint.items
+    provides_first, *provides_others = get_args(factory.provides.type_hint)
 
     res: list[DependencySource] = [
         Alias(
@@ -43,20 +44,20 @@ def unpack_factory(factory: Factory) -> Sequence[DependencySource]:
 
 
 def unpack_decorator(decorator: Decorator) -> Sequence[DependencySource]:
-    if not isinstance(decorator.provides.type_hint, ProvideMultiple):
+    if get_origin(decorator.provides.type_hint) is not ProvideMultiple:
         return [decorator]
 
     return [
         Decorator(
             factory=decorator.factory,
             provides=DependencyKey(provides, decorator.provides.component),
         )
-        for provides in decorator.provides.type_hint.items
+        for provides in get_args(decorator.provides.type_hint)
     ]
 
 
 def unpack_alias(alias: Alias) -> Sequence[DependencySource]:
-    if not isinstance(alias.provides.type_hint, ProvideMultiple):
+    if get_origin(alias.provides.type_hint) is not ProvideMultiple:
         return [alias]
 
     return [
@@ -66,5 +67,5 @@ def unpack_alias(alias: Alias) -> Sequence[DependencySource]:
             cache=alias.cache,
             override=alias.override,
         )
-        for provides in alias.provides.type_hint.items
+        for provides in get_args(alias.provides.type_hint)
     ]

src/dishka/entities/provides_marker.py

@@ -1,20 +1,30 @@
 from __future__ import annotations
 
-from collections.abc import Sequence
-from typing import TYPE_CHECKING, Any
+import sys
+import threading
+from typing import TYPE_CHECKING, Generic, TypeVar
 
 __all__ = ["AnyOf", "ProvideMultiple"]
 
-if TYPE_CHECKING:
-    from typing import Union as AnyOf
+
+if sys.version_info >= (3, 11):
+    from typing import TypeVarTuple, Unpack
+
+    Variants = TypeVarTuple("Variants")
+    class ProvideMultiple(Generic[Unpack[Variants]]):
+        pass
 else:
-    class AnyOf:
-        def __class_getitem__(cls, item: Any) -> Any:
-            if isinstance(item, tuple):
-                return ProvideMultiple(item)
-            return item
+    Variants = TypeVar("Variants")
+    provides_lock = threading.Lock()
 
+    class ProvideMultiple(Generic[Variants]):
+        def __class_getitem__(cls, item):
+            with provides_lock:
+                cls.__parameters__ = [Variants]*len(item)
+                return super().__class_getitem__(item)
 
-class ProvideMultiple:
-    def __init__(self, items: Sequence[Any]) -> None:
-        self.items = items
+
+if TYPE_CHECKING:
+    from typing import Union as AnyOf
+else:
+    AnyOf = ProvideMultiple

src/dishka/entities/with_parents.py

@@ -174,5 +174,5 @@ class WithParents:
         def __class_getitem__(cls, item: TypeHint) -> TypeHint:
             parents = ParentsResolver().get_parents(item)
             if len(parents) > 1:
-                return ProvideMultiple(parents)
+                return ProvideMultiple[tuple(parents)]
             return parents[0]

tests/unit/container/test_alias.py

@@ -100,7 +100,7 @@ class MyProvider(Provider):
         value = 0
 
         @provide(scope=Scope.APP)
-        async def foo(self) -> AsyncIterable[AnyOf[float, int]]:
+        async def foo(self) -> AsyncIterable[AnyOf[float, "int"]]:
             self.value += 1
             yield self.value