I want to return a Result with my error type in the lookup function in the EvalNamespace object. For example, there can be recursion where a is dependent on value a, and I can tell this only when the lookup function is called. And I want to show in an error message that problem exactly in the recursion of user-defined formulas.
I believe this can be done by adding an Error associated type to EmptyNamespace and return something like Result<f64, Either<Self::Error, fasteval::Error>> from the lookup function.
Hi, thanks for the great crate!
I want to return a
Resultwith my error type in thelookupfunction in theEvalNamespaceobject. For example, there can be recursion whereais dependent on valuea, and I can tell this only when thelookupfunction is called. And I want to show in an error message that problem exactly in the recursion of user-defined formulas.I believe this can be done by adding an
Errorassociated type toEmptyNamespaceand return something likeResult<f64, Either<Self::Error, fasteval::Error>>from thelookupfunction.