The old typemap crate is very out of date. It provided a bag multiple types, backed by HashMap<TypeId, Any>. There are other crates that provide similar functionality like anymap, with varying quality. Any opinions on which one to choose?
#Best AnyMap or TypeMap implementation?
junior crag
unreal coral
http::Extensions obviously
To be honest, if this is just for internal use then it’s not hard to make your own type
Other than that, just pick something that seems maintained, like https://docs.rs/type-map
junior crag
Oh, that one looks pretty well maintained... and gives me a less uncomfortable feeling than anymap10.