TensorView materialization over writable and read-only mdspec values. More...

#include <mdspec_tensor_view.hpp>

Inheritance diagram for uni20::MdspecTensorView< MutableMdspec, ConstMdspec, StoragePolicy >:

Collaboration diagram for uni20::MdspecTensorView< MutableMdspec, ConstMdspec, StoragePolicy >:

Public Types
using	backend_selector_type = std::remove_cvref_t< decltype(storage_policy::backend_selector())>

using	const_mdspec_type = ConstMdspec

using	element_type = typename mutable_mdspec_type::element_type

using	extents_type = typename mutable_mdspec_type::extents_type

using	index_type = typename extents_type::index_type

using	mutable_mdspec_type = MutableMdspec

using	storage_policy = StoragePolicy

using	value_type = std::remove_cv_t< element_type >

Public Member Functions
constexpr auto	extent (std::size_t axis) const noexcept -> index_type
	Return one dense-block extent.

constexpr auto	extents () const noexcept -> extents_type const &
	Return the dense-block extents.

constexpr auto	mdspan () &-> mutable_mdspec_type
	Return the writable mdspan when the metadata is immediate.

constexpr auto	mdspan () const &-> const_mdspec_type
	Return the read-only mdspan when the metadata is immediate.

constexpr auto	mdspec () &-> mutable_mdspec_type
	Return writable immediate or descriptor-backed metadata.

constexpr auto	mdspec () const &-> const_mdspec_type
	Return read-only immediate or descriptor-backed metadata.

constexpr	MdspecTensorView (mutable_mdspec_type mutable_mdspec, const_mdspec_type const_mdspec)
	Construct a tensor view from writable and read-only metadata.

template<class... Index> requires MdspanLike<mutable_mdspec_type> && (sizeof...(Index) == extents_type::rank())
constexpr decltype(auto)	operator[] (Index... indices)
	Evaluate or assign one element when writable metadata is immediate.

template<class... Index> requires MdspanLike<const_mdspec_type> && (sizeof...(Index) == extents_type::rank())
constexpr decltype(auto)	operator[] (Index... indices) const
	Evaluate one element when read-only metadata is immediate.

constexpr auto	stride (std::size_t axis) const -> index_type
	Return one dense-block stride when the mapping is strided.

Static Public Member Functions
static constexpr auto	backend_selector () noexcept -> backend_selector_type
	Return the dense storage policy's default backend selector.

static constexpr std::size_t	rank () noexcept
	Return the static dense-block rank.

Detailed Description

template<MdspecLike MutableMdspec, MdspecLike ConstMdspec, class StoragePolicy>
requires (std::same_as<typename MutableMdspec::extents_type, typename ConstMdspec::extents_type> && std::same_as<std::remove_const_t<typename MutableMdspec::element_type>, std::remove_const_t<typename ConstMdspec::element_type>> && std::is_const_v<typename ConstMdspec::element_type> && requires { StoragePolicy::backend_selector(); })
class uni20::MdspecTensorView< MutableMdspec, ConstMdspec, StoragePolicy >

TensorView materialization over writable and read-only mdspec values.

The view owns multidimensional metadata but not the described element storage. Its storage policy supplies tensor-level backend selection; access acquisition remains governed by the stored mdspec data descriptor.

Template Parameters

MutableMdspec	Metadata exposed through the mutable interface.
ConstMdspec	Read-only metadata exposed through the const interface.
StoragePolicy	Dense storage policy associated with the metadata.