std::extents<IndexType,Extents...>::rev-prod-of-extents
Min standard notice:
Returns the product of the sizes of extents with index greater than i. The behavior is undefined if i < rank() is false.
# Declarations
constexpr std::size_t /*rev-prod-of-extents*/( rank_type i ) const noexcept;
(since C++23) (exposition only*)
# Parameters
i: an index above which the sizes of corresponding extents will be multiplied together
# Return value
If i + 1 < rank() is true, return the product of extent(k) for all k in range [i + 1,rank()), otherwise 1.