message: Apply Debug to Evaluated enum
diff: @@ -27,6 +27,7 @@ use super::EvaluateError;
  /// * Similar with `Literal`, `Value` is also generated by any other operation with `ValueRef` or
  /// `Value`.
  /// e.g. `LiteralRef` + `ValueRef`, `LiteralRef` * `Value`, ...
  +#[derive(std::fmt::Debug)]
  pub enum Evaluated<'a> {
  LiteralRef(&'a AstValue),
  Literal(AstValue),
  