Rust Result From Option. Whenever a binary result is to be returned from a function the choice is between using Result or OptionBoth can communicate a failed function callbut the former provides too much specificity while the latter may give too little. We understand enums and generics now so we can understand Option and Result.
To do this we have the Result enum. Okvalue which indicates that the operation succeeded and wraps the value returned by the operation. An element T was found.
Rust provides a robust way to deal with optional values.
As such in the case of jon since the middle name is None the get_nickname function will not be called at all and the above will print none found. Working with OptionResult can be tedious when you are just trying to write some quick code. Get the value inside OptionResult. Okvalue which indicates that the operation succeeded and wraps the value returned by the operation.