#include "tensorstore/util/span.h"
constexpr tensorstore::span<T, Extent>::span();

Constructs an empty/invalid array.

If Extent == dynamic_extent or Extent == 0, then this constructs a valid view of an empty array, with data() == nullptr and size() == 0.

If Extent > 0, then this constructs an invalid view of a non-empty array, with data() == nullptr and size() == Extent.