std::mdspan
<mdspan>
template< class CArray > requires(std::is_array_v<CArray> && std::rank_v<CArray> == 1) mdspan( CArray& ) -> mdspan<std::remove_all_extents_t<CArray>, std::extents<std::size_t, std::extent_v<CArray, 0>>>;
template< class Pointer > requires(std::is_pointer_v<std::remove_reference_t<Pointer>>) mdspan( Pointer&& ) -> mdspan<std::remove_pointer_t<std::remove_reference_t<Pointer>>, std::extents<size_t>>;
template< class ElementType, class... Integrals > requires((std::is_convertible_v<Integrals, std::size_t> && ...) && sizeof...(Integrals) > 0) explicit mdspan( ElementType*, Integrals... ) -> mdspan<ElementType, std::dextents<std::size_t, sizeof...(Integrals)>>;
template< class ElementType, class OtherIndexType, std::size_t N > mdspan( ElementType*, std::span<OtherIndexType, N> ) -> mdspan<ElementType, std::dextents<std::size_t, N>>;
template< class ElementType, class OtherIndexType, std::size_t N > mdspan( ElementType*, const std::array<OtherIndexType, N>& ) -> mdspan<ElementType, std::dextents<std::size_t, N>>;
template< class ElementType, class IndexType, std::size_t... ExtentsPack > mdspan( ElementType*, const std::extents<IndexType, ExtentsPack...>& ) -> mdspan<ElementType, std::extents<IndexType, ExtentsPack...>>;
template< class ElementType, class MappingType > mdspan( ElementType*, const MappingType& ) -> mdspan<ElementType, typename MappingType::extents_type, typename MappingType::layout_type>;
template< class MappingType, class AccessorType > mdspan( const typename AccessorType::data_handle_type&, const MappingType&, const AccessorType& ) -> mdspan<typename AccessorType::element_type, typename MappingType::extents_type, typename MappingType::layout_type, AccessorType>;