rustdoc: Searching for types with generics

[hargoniX]

Over here rust-lang/rfcs#658 I read that rustdoc is able to search for type signatures which works okay-ish when looking for rather primitive type signatures. However I think it would be cool if one could search for generic types (which is also possible in the "role model" of this feature, hoogle). For example on Result<T> and Option<T> there are lots of conversion functions into other types that aren't searchable at the moment due to their generic nature.

For example on Option<T> there are

• map function and variants
• ok function and variants
• unwrap function and variants

and more that are not searchable at the moment by a type signature but all named very similarly so an inexperienced user could easily end up looking around for the proper variant for quite a bit. If the type signature search would support generics the user could just type out the more precise signature they are looking for and easily find the proper variant.

[notriddle]

Should be closed now what these are merged. The feature is in no way “finished,” but going farther could use more detailed requests:

#112725

#116085