1 files changed, 2 insertions, 0 deletions
diff --git a/rust/src/ast.rs b/rust/src/ast.rs
index b179704..0493f59 100644
--- a/rust/src/ast.rs
+++ b/rust/src/ast.rs
@@ -5,6 +5,7 @@ pub enum Value {
     Num(i32),
     Bool(bool),
     Sym(String),
+    App(Box<Value>, Box<Value>),
 }
 
 impl Display for Value {
@@ -13,6 +14,7 @@ impl Display for Value {
             Value::Num(i) => write!(f, "{}", i),
             Value::Bool(b) => write!(f, "{}", b),
             Value::Sym(s) => write!(f, "{}", s),
+            Value::App(l, r) => write!(f, "({} {})", l, r),
         }
     }
 }