1 files changed, 4 insertions, 0 deletions
diff --git a/src/type/mod.rs b/src/type/mod.rs
index 0cbcf83..9e0d9ec 100644
--- a/src/type/mod.rs
+++ b/src/type/mod.rs
@@ -25,6 +25,8 @@ pub enum Type {
     VecOf(Box<Type>),
     VecType, // constructor
 
+    LetType,
+
     /// Type for generics
     /// and also error messages
     /// with unknown types
@@ -102,6 +104,7 @@ impl Type {
             Boolean => Ok(()),
             QuoteTy => Ok(()),
             VecType => Ok(()),
+            LetType => Ok(()),
             Arrow(a, b) => b.is_concrete().and_then(|_ok| a.is_concrete()),
             List(v) => {
                 let mut res = Ok(());
@@ -114,4 +117,5 @@ impl Type {
             VarType(s) => Err(s.clone()),
         }
     }
+
 }