std::extents<IndexType,Extents...>::fwd-prod-of-extents

constexpr std::size_t rank_type /*fwd-prod-of-extents*/( rank_type i ) const noexcept;

(since C++23)
(exposition only*)

Returns the product of the sizes of extents with index less than i. The behavior is undefined if i <= rank() is false.

Parameters

i

-

The end index of the range of extents to be multiplied together.

Return value

If i > 0 is true, return the product of extent(k) for all k in range [0, i), otherwise 1.

Example

See also

rev-prod-of-extents

returns the product of extents size in range [i + 1, rank())
(exposition-only member function*)

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