On Sun, Jun 12 2016 at 02:01:17 AM, Andrey Fidrya via swift-evolution <swift-evolution@swift.org> wrote: > Nil coalescing operator has very low precedence and it's very easy to forget > the parentheses. > It's tempting to write something like this: > > let result = v1 ?? 0 + v2 ?? 0 > > Which will resolve to > > let result = v1 ?? (0 + v2 ?? 0)
This is how I would expected the operator to work. > This seems to be a source of errors in other languages as well, for example: > http://www.codeproject.com/Tips/721145/Beware-The-null-coalescing-operator-is-low-in-the > > I propose to consider raising it's precedence or requiring parentheses if ?? > is used with multiple statements. I like the idea of requiring parenthesis (or at least having a warning) on ambiguous lines with two `??`. -- Roth _______________________________________________ swift-evolution mailing list swift-evolution@swift.org https://lists.swift.org/mailman/listinfo/swift-evolution
