[−][src]Function gluon_base::types::visit_type_opt
pub fn visit_type_opt<F: ?Sized, I, T>(typ: &T, f: &mut F) -> Option<T> where
F: TypeVisitor<I, T>,
T: TypePtr<Id = I> + Clone,
T::Types: Clone,
T::Generics: Clone,
T::Fields: Clone,
T::TypeFields: Clone,
T::SpannedId: Clone,
I: Clone,