For now, this reference is a best-effort document. We strive for validity and completeness, but are not yet there. In the future, the docs and lang teams will work together to figure out how best to do this. Until then, this is a best-effort attempt. If you find something wrong or missing, file an issue or send in a pull request.

The Deref trait

The Deref<Target = U> trait allows a type to implicitly implement all the methods of the type U. When attempting to resolve a method call, the compiler will search the top-level type for the implementation of the called method. If no such method is found, .deref() is called and the compiler continues to search for the method implementation in the returned type U.