move dlist from core -> std #5634
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Closes #3549 The issue report has some reasoning, but I'd like to add that I don't think managed pointers belong in core. It's *possible* to write a safe doubly-linked list on top of `unsafe`, but it would be much more limited and I don't think there's much of a use case - it would lose a lot of flexibility. You're probably better off using a vector, hash table, tree, heap or ring buffer in almost every case.
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Closes #3549
The issue report has some reasoning, but I'd like to add that I don't think managed pointers belong in core. It's possible to write a safe doubly-linked list on top of
unsafe, but it would be much more limited and I don't think there's much of a use case - it would lose a lot of flexibility. You're probably better off using a vector, hash table, tree, heap or ring buffer in almost every case.