do/try/catch use the error handling mechanism, named exception. I think we should use it carefully , it will results convoluted code and the risk of exception safe.
Fernando Rodríguez <[email protected]>于2016年8月6日 周六07:50写道： > Hi, > > I do a lot of training and one of the features of Swift that seems more > confusing to students (and myself) is error handling. There are too many > ways of doing it, and none seems satisfactory. > > Let's take for example an initializer. There are 2 different ways of > handling errors within an init: > > a) Old School: return nil. This was very simple in Objective C, because > the uncommon case of an error could be easily ignored...until everything > crashed. > > In Swift it's not easy (nor advisable IMHO) to completely ignore the > possibility of an error. Besides, it has 2 complications. > > First of all, you return an Optional, and Optionals have a tendency to go > viral. Suddenly, all your code has to deal with optionals. > > Secondly, you have no information about the error itself. > > b) do/try/catch > > This allows you to have information about the error, but also causes the > newly created object to be "trapped" inside a do block. > > Are there any plans to address this situation? I believe there should be a > single, obvious and convenient way of handling errors in the language. > > What do you guys think? > > > > -- > > > * <http://keepcoding.io/es/>* > > > *Fernando Rodríguez* > > m. +34 610 965 332 > > t. +34 91 629 57 61 > > fernando@k <[email protected]>eepcoding.io > > [image: pastedGraphic.png] [image: pastedGraphic_1.png] [image: > pastedGraphic_2.png] > > *KeepCoding.io* > > 2120 University Avenue, Berkeley, CA > > > Avda. Fuencarral, 44, Ed. 8, Loft 30 > > 28108 Alcobendas (Madrid) Spain > > > _______________________________________________ > swift-evolution mailing list > [email protected] > https://lists.swift.org/mailman/listinfo/swift-evolution >
_______________________________________________ swift-evolution mailing list [email protected] https://lists.swift.org/mailman/listinfo/swift-evolution
