In several recent conference presentation I've heard Bjarne Stroustrup and others mention new coding guidelines for C++ and some types supporting them.
Specifically, I remember the example of span<T> instead of (T* p, int n) as a parameter to a function (at time about 32:00 into the talk); but I also remember the suggestion to use array_view<T>. Are they two alternatives but the same concept? Or am I confusing things and they're actually not so related?
I can't seem to find any authoritative definition of what they're both supposed to be about.
We talked with people in the library working group in the standards committee. They wanted the array_view they are trying to get into the standard to be read only. For the core guidelines, we needed an abstraction that was read and write. To avoid a clash between the (potential) standards and the guidelines support library (GSL), we renamed our (read and write) array_view to span: https://github.com/microsoft/gsl .