wip: Strict deserialization returns error on any unknown xml field

[jggc]

This is a feature request with some sample code to support the idea.

I am creating a strict parser that will deserialize a rather large configuration file from a running environment, modify it and write it back.

I need to be 100% sure that I won't be modifying anything else and I want complete type safety so I decided to go with yaserde.

However, I tried setting #[yaserde(deny_unknown_fields)] but it does nothing (or I don't understand what it should be doing).

Question 1 : Is this an existing feature that I missed ?

Question 2 : Is this catch all case of the event name the right place to return Err(...) ?

If so, I may very well try to make a cleaner implementation based on deny_unknown_fields if that sounds correct to you.