> On 2017-10-12, at 12:03 PM, Xiaodi Wu <xiaodi...@gmail.com> wrote: > > Single elements can legally span multiple lines; this would be hugely source > breaking. What problem are you trying to solve?
The same problem that is solved by the precedent of semicolons being optional (clutter). I don’t see anything substantive about the analogy that does not hold. Plus there is the meta-problem of inconsistency, where the analogy is apt but not expressed in the language. > On Thu, Oct 12, 2017 at 13:50 Dave Yost via swift-evolution > <swift-evolution@swift.org <mailto:swift-evolution@swift.org>> wrote: > > Speaking as a huge fan of optional semicolons... > > > This seems clear: > > semicolon : sequence of statements > :: comma : sequence of elements in an array literal > > and so it occurred to me that this should hold: > > A semicolon : the last statement on a line. > :: A comma : the last array element on a line. > > ∴ A comma after the last array element on a line should be optional. > > and these should be legal Swift: > > let list = [ > 1 > 2 > ] > > let dict = [ > 1 : 2 > 2 : 3 > ] > > equivalent to: > > let list = [ 1, 2 ] ; let dict = [ 1 : 2, 2 : 3 ] > > > Or, as the Language Reference would say: > > A semicolon (;) can optionally appear after any statement and is used to > separate multiple statements if they appear on the same line. > > A comma (,) can optionally appear after any element of an array literal and > is used to separate multiple elements if they appear on the same line. > > Or: > > A semicolon (;) separates statements but is optional after the last statement > on a line. > > A comma (,) separates elements of an array literal but is optional after the > last element on a line. > > > _______________________________________________ > swift-evolution mailing list > swift-evolution@swift.org <mailto:swift-evolution@swift.org> > https://lists.swift.org/mailman/listinfo/swift-evolution > <https://lists.swift.org/mailman/listinfo/swift-evolution>
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