Infer type param related nodes as themselves

Author: jacobtylerwalls

astroid/inference.py

@@ -92,6 +92,9 @@ def infer_end(
 nodes.Lambda._infer = infer_end  # type: ignore[assignment]
 nodes.Const._infer = infer_end  # type: ignore[assignment]
 nodes.Slice._infer = infer_end  # type: ignore[assignment]
+nodes.TypeAlias._infer = infer_end  # type: ignore[assignment]
+nodes.TypeVar._infer = infer_end  # type: ignore[assignment]
+nodes.ParamSpec._infer = infer_end  # type: ignore[assignment]
 
 
 def _infer_sequence_helper(

tests/test_type_params.py

@@ -22,14 +22,19 @@ def test_type_alias() -> None:
     assert node.value.slice.name == "tuple"
     assert all(elt.name == "float" for elt in node.value.slice.elts)
 
+    assert node.inferred()[0] is node
+    assert node.type_params[0].inferred()[0] is node.type_params[0]
+
 
 @pytest.mark.skipif(not PY312_PLUS, reason="Requires Python 3.12 or higher")
 def test_type_param_spec() -> None:
     node = extract_node("type Alias[**P] = Callable[P, int]")
     params = node.type_params[0]
     assert isinstance(params, ParamSpec)
     assert params.name == "P"
-    
+
+    assert node.inferred()[0] is node
+
 
 @pytest.mark.skipif(not PY312_PLUS, reason="Requires Python 3.12 or higher")
 def test_type_param() -> None: