Add print

examples/test.lua

@@ -1 +1 @@
-global c = max(5, 7)
+global c = print(5, 7)

src/main.rs

@@ -31,6 +31,14 @@ impl RustFunction for Max {
         }
     }
 }
+#[derive(Debug)]
+pub struct Print;
+impl RustFunction for Print {
+    fn execute(&self, parameters: Vec<vm::Value>) -> Vec<vm::Value> {
+        println!("{:?}", parameters);
+        Vec::new()
+    }
+}
 
 fn main() {
     let file_path = PathBuf::from("../examples/test.lua");
@@ -68,6 +76,10 @@ fn main() {
         vm::Constant::String("max".to_owned()),
         vm::Value::RustFunction(Rc::new(RefCell::new(Max))),
     );
+    vm.environment.borrow_mut().globals.insert(
+        vm::Constant::String("print".to_owned()),
+        vm::Value::RustFunction(Rc::new(RefCell::new(Print))),
+    );
 
     let closure = vm.create_closure(0);