Incomplete API Docs (trait implementations)

[b-naber]

This is more of an issue, but since the issues section explicitly asks for bugs, I decided to post this here.

I noticed that the API docs are somewhat confusing in that it's not explicit that some types implement certain traits that are required in the public API. E.g. HttpServer requires an impl IntoServiceFactory to be returned in the closure parameter. App does implement IntoServiceFactory but this information is nowhere to be found in the docs. There are other such occurrences where the interdependence between the actix crates results in similar problems. Are there plans to improve this?

[robjtede]

I guess the answer to this is: we would appreciate specific examples (in issues would be good) of all cases where documentation is confusing to the folks who do not work on it day-to-day. HttpServer's IntoServiceFactory bound is a good example and can certainly be improved in the documentation.

There are still certain limitations of Rust's type system that make this sort of indirection necessary and helping newcomers understand this hurdle is definitely a goal of Actix Web.