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August 29, 2015 14:10
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Upconverted function returning tuple of optionals corrupts on destructuring return value
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| func f()->(Int,Int) { | |
| return (1,1) | |
| } | |
| func g(f: ()->(Int?,Int?)) -> (Int,Int) { | |
| let (a,b) = f() | |
| return (a ?? 0, b ?? 0) | |
| } | |
| // ()->(Int,Int) is substitutable for | |
| // ()->(Int?,Int?) so this compiles | |
| let x = g(f) | |
| // but results are corrupted | |
| println(x) | |
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