seperated builtins

object/builtin_exit.go

@@ -0,0 +1,17 @@
+package object
+
+import "os"
+
+// Exit ...
+func Exit(args ...Object) Object {
+	if len(args) == 1 {
+		if args[0].Type() != INTEGER_OBJ {
+			return newError("argument to `exit` must be INTEGER, got %s",
+				args[0].Type())
+		}
+		os.Exit(int(args[0].(*Integer).Value))
+	} else {
+		os.Exit(0)
+	}
+	return nil
+}