This piece of code introduces ..? operator which lets you handle unexpected nil found in an optional just like you would with any other Swift errors - with do/try/catch.

ThrowingUnwrapOperator.swift

postfix operator ..?

extension Optional {
    static postfix func ..? (optional: Optional<Wrapped>) throws -> Wrapped {
        if let value = optional {
            return value
        } else {
            throw OptionalUnwrapError.nilFound
        }
    }
}

enum OptionalUnwrapError: Error {
    case nilFound
}