Stephen, You are right the proposal #0024 is very close. But in fact the logic is inverted.
When using «=? » the right item is optional. a =? b assigns « b » to « a » only if « b » is defined. So if an optional is defined =? will not erase its value. But my real questions was… Do you have such operators that you really use very often? Should we incorporate bunches of new operators / micro-syntactic sugar? Is swift evolution the good place to discuss such question? I don’t want to pollute your mail boxes. Best regards, B > Le 21 déc. 2017 à 19:12, Stephen Celis <stephen.ce...@gmail.com> a écrit : > > Such an operator was proposed here: > https://github.com/apple/swift-evolution/blob/60a8980a66a0a1341871ec323797c5547d0e0925/proposals/0024-optional-value-setter.md > > <https://github.com/apple/swift-evolution/blob/60a8980a66a0a1341871ec323797c5547d0e0925/proposals/0024-optional-value-setter.md> > > It was ultimately rejected: > https://lists.swift.org/pipermail/swift-evolution-announce/2016-February/000043.html > > <https://lists.swift.org/pipermail/swift-evolution-announce/2016-February/000043.html> > > Stephen > >> On Dec 21, 2017, at 11:44 AM, Benoit Pereira da silva via swift-evolution >> <swift-evolution@swift.org <mailto:swift-evolution@swift.org>> wrote: >> >> Dear all, >> >> That’s not ambitious but i think worth be explored. >> >> What do you think for example of this Infix operator? >> « =? » allows to express optional assignments in a very concise way. >> >> >> // The `=? operator allows simplify optional assignements : >> // `a = b ?? a` can be written : `a =? b` >> infix operator =?: AssignmentPrecedence >> >> public func =?<T> ( left:inout T?, right: T? ){ >> left = right ?? left >> } >> >> public func =?<T> ( left:inout T, right: T? ){ >> left = right ?? left >> } >> >> >> Do you have such operators that you really use very often? >> Benoit Pereira da Silva Ultra Mobile Developer & Movement Activist Développeur Ultra Mobile & Militant du mouvement https://pereira-da-silva.com <https://pereira-da-silva.com/> ✄ -------------------------------- This e-mail is confidential. Distribution, copy, publication or use of this information for any purpose is prohibited without agreement of the sender. Ce message est confidentiel. Toute distribution, copie, publication ou usage des informations contenues dans ce message sont interdits sans agrément préalable de l'expéditeur.
_______________________________________________ swift-evolution mailing list swift-evolution@swift.org https://lists.swift.org/mailman/listinfo/swift-evolution
