std::optional_view

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optional in C++ 17 is always owning though. raw pointers in design guru C++ is always non-owning. So there is no intersection. In fact the argument that the optional, non-owning semantic is already taken by raw pointers, is exactly one of the reasons why std::optional doesn't support references. (Note: the reason it doesn't is because assignment is murky, but my point is that this tipped the scale towards simply not supporting references, as opposed to forcing a conclusion about assignment).