> I know you're not proposing that feature right now, but want to understand > how you expect it to work. It looks to me like this starts to enter design > by contract territory. Would the predicate behave as if it was part of a > precondition?
I suppose I imagine it as equivalent to a precondition() placed at the call site, rather than inside the function. If the compiler can prove that the precondition will be violated, it can refuse to compile the call. But I haven't thought deeply about it, so I don't really know for sure. -- Brent Royal-Gordon Architechies _______________________________________________ swift-evolution mailing list swift-evolution@swift.org https://lists.swift.org/mailman/listinfo/swift-evolution
