I'm using Alamofire and after I do the fetch request I'm handling the error with:

guard case let .failure(error) = response.result else { return }

if let error = error as? AFError {
    switch error {
            ...
    }
}

Problem:

In line if let error = error as? AFError { Xcode has a warning:

Conditional cast from 'AFError' to 'AFError' always succeeds

How can I Fix (preferred) or silence that warning?

I tried:

Removing it like this:

if let error = error {

but it says:

Initializer for conditional binding must have Optional type, not 'AFError'

Thanks

CodePudding user response：

You’ve already handled the case where you don’t have an error by returning. Thus, error is guaranteed to be a valid error object - it is not an optional, so you don’t need if let at all.