Macro impl_default_validation_on_set

macro_rules! impl_default_validation_on_set {
    ($({ $field:ident, $type:ty, $default:expr, $is_mutable:expr, $($rest:tt)* },)*) => { ... };
}

Define check rules when a field is changed. If you want custom rules, please override the default implementation in OverrideValidateOnSet below.