Understanding the Result Type in Swift
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Error handling when expecting a result out of an operation is a very common thing to do. For this reason, various high-level programming languages have introduced a Result type into their libraries, on top of their existing error-handling features. This feature was implemented in Swift 5.
A Result wraps a success or a failure. It is essentially an enum with two possible cases: .success and .failure. The .success case wraps the correct result of an operation, whereas a .failure wraps an Error. Its implementation uses generics, so you always know what you are going to get back.