Xcode-beta (6E14): Swift - switch statements should warn
| Originator: | owensd | ||
| Number: | rdar://21001503 | Date Originated: | 18-May-2015 10:57 AM |
| Status: | Closed | Resolved: | Fixed |
| Product: | Developer Tools | Product Version: | Xcode-beta (6E14) |
| Classification: | Enhancement | Reproducible: | Always |
Summary:
It would probably be good to have a warning when switch cases are not reachable:
let x = 5, y = 10
switch (x, y) {
case (_, _):
println("_, _")
case (5, _):
println("5, _")
case (_, 10):
println("_, 10")
case (5, 10):
println("5, 10")
}
All of the cases after _,_ are unreachable. This can lead to some subtle bugs if not careful.
Comments
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