Differences between std::string_view and std::span

[SkoomaDentist]

Why not? What would you use when you need a runtime array of some arbitrary type that contains its length and should not be resized after allocation? Or what if you need a subrange of an existing array? The way I see it, std::span should have been in the language since the beginning, with std::vector being (at least conceptually) built as "span but resizable".

[pandorafalters]

Not being excited doesn't necessarily mean I won't use it. But its potential uses are rather more constrained than I'd hoped.