For context, some prior discussions on this topic: "Reconsidering SE-0003 Removing var from Function Parameters and Pattern Matching" (couldn't find one representative message — search it yourself https://lists.swift.org/pipermail/swift-evolution/Week-of-Mon-20160125/thread.html )
The bind thread <https://lists.swift.org/pipermail/swift-evolution/Week-of-Mon-20160201/008649.html> On Sun, Aug 28, 2016 at 12:54 PM, Nicholas Exner via swift-evolution < [email protected]> wrote: > Dear Swift Evolution Group Members, > Recently, as I was reviewing some code that I wrote, I was > wondering what the community’s thoughts are on the possible value of having > a special “if let” self-assignment operator added to the language (such as > =? ). A sort of syntactic sugar that allows for optional unwrapping into a > scoped variable of the same name as the variable in the larger scope. Here > is some before and after code of what I am contemplating: > > *Current:* > var str:String? > str = "Hello" > > if let str = str { > print(str) > } > > *Abbreviated:* > var str:String? > str = “Hello” // Output is Hello, not Optional(“Hello”) > > if let str =? { > print(str) // Output is also Hello, not Optional(“Hello”) > } > > The value that I perceive of adding this to the language would be to allow > a short-hand way to unwrap in a “if let" conditional and allowing > developers to reduce duplication when a unique variable name is not > needed. By the way, I’m a big fan of ternary operators which the community > already sees of value. > > Let me know your thoughts. Is this something that could be put into a > proposal? > > Cheers, > —Nick— > . > > > > _______________________________________________ > swift-evolution mailing list > [email protected] > https://lists.swift.org/mailman/listinfo/swift-evolution > >
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