diff --git a/src/lib.rs b/src/lib.rs
index 95aee03..e8539aa 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -46,6 +46,7 @@ pub struct Instance {
 
 /// a Room can have many Exits in different positions,
 /// optionally with a transition and dialogue
+/// todo make a from_str() function for this
 #[derive(Clone, Debug, Eq, PartialEq)]
 pub struct ExitInstance {
     position: Position,