swift - Catch multiple errorTypes? -

i'm looking way catch multiple types of errors in catch. i've tried fallthrough , comma separated style switch statement , neither works. docs nothing catching multiple pattern 1. it's not clear me of pattern syntaxes work here.

error definitions (sample):

enum apperrors {   case notfound(objecttype: string, id: int)   case alreadyused } 

works:

do {   //... } catch apperrors.notfound {   makenewone() } catch apperrors.alreadyused {   makenewone() } catch {   print("unhandled error: \(error)") } 

does not compile, possible this?

do {   //... } catch apperrors.notfound, apperrors.alreadyused {   makenewone() } catch {   print("unhandled error: \(error)") } 

if want catch apperrors, can use pattern:

catch apperrors 

if you're looking more specific matching, seems ugly.

this let catch specific cases of apperrors:

catch let error apperrors error == .notfound || error == .alreadyused 

there's syntax seems work:

catch let error apperrors [.notfound, .alreadyused].contains(error) 

for completeness sake, i'll add option, allows catch errors of 2 different types, doesn't allow specify case within types:

catch let error error apperrors || error nserror 

---

finally, based on fact anything catch conform errortype protocol, can clean second & third examples provided errortype extension , use in conjunction where clause in our catch:

extension errortype {     var isfooerror: bool {         guard let err = self as? apperrors else { return false }         return err == .notfound || err == .alreadyused     } } 

and catch this:

catch let error error.isfooerror