std::extents<IndexType,Extents...>::index-cast

template< class OtherIndexType >
static constexpr auto /*index-cast*/( OtherIndexType&& i ) noexcept;

Casts the index i of type OtherIndexType into a certain integral type.

It is equivalent to:

• return i;, if OtherIndexType is an integral type other than bool and
• return static_cast<index_type>(i); otherwise.

Parameters

Return value

Cast index.

Notes

A call to this function will always return an integral type other than bool. Integer-class types can use the static_cast branch without loss of precision because this function's call sites are already constrained on the convertibility of OtherIndexType to index_type.