Commits
Joe Groff committed 61f64f3323d
stdlib: Add a '??' nil-coalescing operator. Similar to nil-coalescing operators in other languages, this operator takes an optional on the left and a non-optional expression on the right, and if the optional is nil, evaluates the right side, otherwise returning the value from the optional itself. <rdar://problem/15247356> Swift SVN r20593