Multidimensional array views and associated utilities

#include <heyoka/mdspan.hpp>

In order to interact with and represent multidimensional array views, heyoka includes a reference implementation of the mdspan class from C++23/C++26, plus some of the associated utilities. The implementation in heyoka follows the standard API and, as an extension, it also supports indexing via the function call operator. Note that the classes and functions listed below are distinct from those in the std namespace, even if the compiler provides them.

Please refer to the documentation page on cppreference for the full API documentation.

template<typename T, typename Extents, typename LayoutPolicy = layout_right, typename AccessorPolicy = default_accessor<T>>
using mdspan

template<typename IndexType, std::size_t... Extents>
using extents

template<typename IndexType, std::size_t Rank>
using dextents

class layout_left

class layout_right

class layout_stride

template<typename ElementType>
using default_accessor

inline constexpr auto full_extent

template<typename T, typename Extents, typename LayoutPolicy, typename AccessorPolicy, typename ...SliceSpecifiers>
constexpr auto submdspan(const mdspan<T, Extents, LayoutPolicy, AccessorPolicy> &x, SliceSpecifiers... slices)