What's the difference between span and array_view in the gsl library?

Question

In several recent conference presentation I\'ve heard Bjarne Stroustrup and others mention new coding guidelines for C++ and some types supporting them.

Specificall

Answer 1

In the CppCoreGuidlines The original array_view was renamed to span.

See: https://github.com/isocpp/CppCoreGuidelines/pull/377

It is described thus:

span is a bounds-checked, safe alternative to using pointers to access arrays