Who has examples they like of ways to control Deep Copy operations so that they don't go crazy and copy too much stuff by accident, and it takes you a long time to notice (or maybe you never notice)?
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To be more specific you then don’t implement copy for certain language intrinsics. Like say list, stack, queue, ptr etc. that way if the user wants to copy them they must explicitly implement a copy function. At that point the developer has specified intent and is let them.
This is impractical and not really helpful .. basically the same as C++.
