Add Function to AST

src/ast.rs

@@ -31,6 +31,12 @@ pub enum Expression {
 		callee: Ident,
 		args: Vec<Expression>,
 	},
+	Function {
+		name: Option<Ident>,
+		args: Vec<Ident>,
+		body: Vec<Statement>,
+		ret: Option<Box<Expression>>,
+	},
 }
 
 #[derive(Debug, Clone, Default)]

src/run.rs

@@ -103,6 +103,7 @@ impl Eval for Expression {
 				let args = args.iter().map(|arg| arg.eval(scope)).collect();
 				(function.inner)(scope, args)
 			}
+			Expression::Function { .. } => todo!(),
 		}
 	}
 }