Add the ability to have a tree_type when we send method info metadata

func_adl_xAOD/common/meta_data.py

@@ -99,7 +99,11 @@ def process_metadata(
             if "return_type" in md:
                 # Single return type
                 type_info = parse_type(md["return_type"])
-                term = terminal(type_info.name, p_depth=type_info.pointer_depth)
+                term = terminal(
+                    type_info.name,
+                    p_depth=type_info.pointer_depth,
+                    tree_type=md.get("tree_type", None),
+                )
             else:
                 type_info_element = parse_type(md["return_type_element"])
                 type_info_collection = (

tests/common/test_meta_data.py

@@ -82,6 +82,25 @@ def test_md_method_type_double():
     assert t.deref_depth == 0
 
 
+def test_md_method_type_double_tree_type():
+    "Make sure a double can be set"
+    metadata = [
+        {
+            "metadata_type": "add_method_type_info",
+            "type_string": "my_namespace::obj",
+            "method_name": "pT",
+            "return_type": "double",
+            "tree_type": "int",
+        }
+    ]
+
+    process_metadata(metadata)
+
+    t = method_type_info("my_namespace::obj", "pT")
+    assert t is not None
+    assert t.r_type.tree_type.type == "int"
+
+
 def test_md_method_type_double_deref():
     "Make sure a double can be set"
     metadata = [