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Is there any way to get the index of an element from a pointer to the element? To be specific, what I need is the index (or iterator) to the element preceding or following the one I point. I know that when using vectors you can easily do the arithmetics but in a deque it is not so easy.
I have to use deque. Vectors are not an option.
I believe the answer is no. But why not use iterators rather than pointers throughout?