diff --git a/src/interpreter.rs b/src/interpreter.rs
index e69de29..4f531c7 100644
--- a/src/interpreter.rs
+++ b/src/interpreter.rs
@@ -0,0 +1,8 @@
+/// A value being handled by the interpreter.
+#[derive(Debug, Clone)]
+pub enum Value {
+    Nil,
+    Boolean(bool),
+    String(String),
+    Number(f64),
+}