Passing a sub-range of a vector by reference

[nuzzle]

So I'm wondering if it is possible to directly pass a sub-range of my_vector by reference, without having to create a new vector and manually copy over all of the relevant elements?

You could pass a start-of-range iterator and a range length to the function. The function can then use the iterator for either sequential or random access to the elements within the range.

More ambitious would be to introduce a class called say Subrange which is used to access a vector subrange while hiding the details. A Subrange object would then be passed to the function. Clean, simple, safe and efficient (at least potentially ).