Add stubs for type params and type aliases

crates/ruff/src/checkers/ast/mod.rs

@@ -590,6 +590,7 @@ where
                     keywords,
                     decorator_list,
                     body,
+                    type_params: _,
                     range: _,
                 },
             ) => {

crates/ruff/src/rules/pycodestyle/rules/lambda_assignment.rs

@@ -225,6 +225,7 @@ fn function(
                 decorator_list: vec![],
                 returns: Some(Box::new(return_type)),
                 type_comment: None,
+                type_params: vec![],
                 range: TextRange::default(),
             });
             return generator.stmt(&func);
@@ -237,6 +238,7 @@ fn function(
         decorator_list: vec![],
         returns: None,
         type_comment: None,
+        type_params: vec![],
         range: TextRange::default(),
     });
     generator.stmt(&func)

crates/ruff/src/rules/pyupgrade/rules/convert_named_tuple_functional_to_class.rs

@@ -171,6 +171,7 @@ fn create_class_def_stmt(typename: &str, body: Vec<Stmt>, base_class: &Expr) ->
         keywords: vec![],
         body,
         decorator_list: vec![],
+        type_params: vec![],
         range: TextRange::default(),
     }
     .into()

crates/ruff/src/rules/pyupgrade/rules/convert_typed_dict_functional_to_class.rs

@@ -128,6 +128,7 @@ fn create_class_def_stmt(
         keywords,
         body,
         decorator_list: vec![],
+        type_params: vec![],
         range: TextRange::default(),
     }
     .into()

crates/ruff_python_formatter/src/statement/mod.rs

@@ -42,6 +42,7 @@ impl FormatRule<Stmt, PyFormatContext<'_>> for FormatStmt {
             Stmt::ClassDef(x) => x.format().fmt(f),
             Stmt::Return(x) => x.format().fmt(f),
             Stmt::Delete(x) => x.format().fmt(f),
+            Stmt::TypeAlias(_) => todo!(),
             Stmt::Assign(x) => x.format().fmt(f),
             Stmt::AugAssign(x) => x.format().fmt(f),
             Stmt::AnnAssign(x) => x.format().fmt(f),