NSCoder.DecodingFailurePolicy.setErrorAndReturn
A failure policy that directs the coder to capture the failure as an error object.
Declaration
case setErrorAndReturnDiscussion
On decode failure, the NSCoder will capture the failure as an NSError, and prevent further decodes (by returning 0 / nil equivalent as appropriate).
Use this policy if you know that all encoded objects use failWithError(_:) to communicate decode failures and don’t raise exceptions for error propagation.