hmm

src/ast/op.rs

@@ -0,0 +1,19 @@
+#[derive(Debug, Clone)]
+pub enum Op {
+    Add,
+    Subtract,
+    Multiply,
+    Divide,
+}
+
+impl Op {
+    pub fn eval(&self) -> String {
+        let text: &str = match self {
+           Op::Add => "+",
+           Op::Subtract => "-",
+           Op::Multiply => "*",
+           Op::Divide => "/",
+        };
+        text.to_string()
+    }
+}