Examples: var x:(Int where 1…10 ~= x) = 5 var y:(Double where trunc(y*2) == y*2) = 3.5
x = 11 // run-time error y = 3.6 // run-time error typealias T = Double(y) where trunc(y*2) == y*2 var y2:T = 4.5 // type for 10x10 grid of integers typealias Grid = [[Int]](g) where g.indices == 0..<10 && g[i].indices == 0..<10 for i in g.indices _______________________________________________ swift-evolution mailing list [email protected] https://lists.swift.org/mailman/listinfo/swift-evolution
