support dictionary literal TypedDict constructors

Author: ibraheemdev

crates/ty_python_semantic/resources/mdtest/typed_dict.md

@@ -315,6 +315,8 @@ Person(name="Alice", age=30, extra=True)  # type: ignore
 The positional dictionary constructor pattern (used by libraries like strawberry) should work
 correctly:
 
+`class.py`:
+
 ```py
 from typing import TypedDict
 
@@ -335,6 +337,26 @@ user3 = User({"name": None, "age": 25})
 user4 = User({"name": "Charlie", "age": 30, "extra": True})
 ```
 
+`functional.py`:
+
+```py
+from typing import TypedDict
+
+User = TypedDict("User", {"name": str, "age": int})
+
+# Valid usage - all required fields provided
+user1 = User({"name": "Alice", "age": 30})
+
+# error: [missing-typed-dict-key] "Missing required key 'age' in TypedDict `User` constructor"
+user2 = User({"name": "Bob"})
+
+# error: [invalid-argument-type] "Invalid argument to key "name" with declared type `str` on TypedDict `User`: value of type `None`"
+user3 = User({"name": None, "age": 25})
+
+# error: [invalid-key] "Invalid key access on TypedDict `User`: Unknown key "extra""
+user4 = User({"name": "Charlie", "age": 30, "extra": True})
+```
+
 ## Optional fields with `total=False`
 
 By default, all fields in a `TypedDict` are required (`total=True`). You can make all fields

crates/ty_python_semantic/src/types.rs

@@ -4865,16 +4865,21 @@ impl<'db> Type<'db> {
 
             Type::EnumLiteral(enum_literal) => enum_literal.enum_class_instance(db).bindings(db),
 
-            Type::KnownInstance(KnownInstanceType::TypedDictType(typed_dict)) => Binding::single(
-                self,
-                Signature::new(
-                    // TODO: List more specific parameter types here for better code completion.
-                    Parameters::new([Parameter::keyword_variadic(Name::new_static("kwargs"))
-                        .with_annotated_type(Type::any())]),
-                    Some(Type::TypedDict(TypedDictType::Synthesized(typed_dict))),
-                ),
-            )
-            .into(),
+            Type::KnownInstance(KnownInstanceType::TypedDictType(typed_dict)) => {
+                CallableBinding::from_overloads(
+                    self,
+                    [Signature::new(
+                        // TODO: List more specific parameter types here for better code completion.
+                        Parameters::new([
+                            Parameter::variadic(Name::new_static("args")),
+                            Parameter::keyword_variadic(Name::new_static("kwargs"))
+                                .with_annotated_type(Type::any()),
+                        ]),
+                        Some(Type::TypedDict(TypedDictType::Synthesized(typed_dict))),
+                    )],
+                )
+                .into()
+            }
 
             Type::KnownInstance(known_instance) => {
                 known_instance.instance_fallback(db).bindings(db)