Base class for multi-dimensional views. More...

#include <arccore/base/MDSpan.h>

Public Types
using	value_type = DataType
using	ExtentsType = Extents
using	LayoutPolicyType = LayoutPolicy
using	MDIndexType = typename Extents::MDIndexType
using	LoopIndexType = MDIndexType
using	ArrayExtentsWithOffsetType = ArrayExtentsWithOffset<Extents, LayoutPolicy>
using	DynamicDimsType = typename Extents::DynamicDimsType
using	RemovedFirstExtentsType = typename Extents::RemovedFirstExtentsType
using	ArrayBoundsIndexType = typename Extents::MDIndexType
using	IndexType = typename Extents::MDIndexType

Public Member Functions
constexpr __host__ __device__	MDSpan (DataType *ptr, ArrayExtentsWithOffsetType extents)
constexpr __host__ __device__	MDSpan (DataType *ptr, const DynamicDimsType &dims)
template<typename X, typename = std::enable_if_t<std::is_same_v<X, UnqualifiedValueType>>>
constexpr __host__ __device__	MDSpan (const MDSpan< X, Extents > &rhs)
constexpr __host__ __device__	MDSpan (SmallSpan< DataType > v)
constexpr __host__ __device__	MDSpan (SmallSpan< const DataType > v)
constexpr __host__ __device__ ThatClass &	operator= (SmallSpan< DataType > v)
constexpr __host__ __device__ ThatClass &	operator= (SmallSpan< const DataType > v)
constexpr __host__ __device__ DataType *	_internalData ()
constexpr __host__ __device__ const DataType *	_internalData () const
ArrayExtents< Extents >	extents () const
ArrayExtentsWithOffsetType	extentsWithOffset () const
constexpr __host__ __device__ Int32	extent0 () const
	Value of the first dimension.
constexpr __host__ __device__ Int32	extent1 () const
	Value of the second dimension.
constexpr __host__ __device__ Int32	extent2 () const
	Value of the third dimension.
constexpr __host__ __device__ Int32	extent3 () const
	Value of the fourth dimension.
constexpr __host__ __device__ Int64	offset (Int32 i, Int32 j, Int32 k, Int32 l) const
	Value for element i,j,k,l.
constexpr __host__ __device__ Int64	offset (Int32 i, Int32 j, Int32 k) const
	Value for element i,j,k.
constexpr __host__ __device__ Int64	offset (Int32 i, Int32 j) const
	Value for element i,j.
constexpr __host__ __device__ Int64	offset (Int32 i) const
	Value for element i.
constexpr __host__ __device__ Int64	offset (MDIndexType idx) const
	Value for element idx.
constexpr __host__ __device__ DataType &	operator() (Int32 i, Int32 j, Int32 k, Int32 l) const
	Value for element i,j,k,l.
__host__ __device__ DataType &	operator() (Int32 i, Int32 j, Int32 k) const
	Value for element i,j,k.
constexpr __host__ __device__ DataType &	operator() (Int32 i, Int32 j) const
	Value for element i,j.
constexpr __host__ __device__ DataType &	operator() (Int32 i) const
	Value for element i.
constexpr __host__ __device__ DataType	operator[] (Int32 i) const
	Value for element i.
constexpr __host__ __device__ DataType &	operator() (MDIndexType idx) const
	Value for element idx.
constexpr __host__ __device__ DataType *	ptrAt (Int32 i, Int32 j, Int32 k, Int32 l) const
	Pointer to the value for element i,j,k,l.
__host__ __device__ DataType *	ptrAt (Int32 i, Int32 j, Int32 k) const
	Pointer to the value for element i,j,k.
constexpr __host__ __device__ DataType *	ptrAt (Int32 i, Int32 j) const
	Pointer to the value for element i,j.
constexpr __host__ __device__ DataType *	ptrAt (Int32 i) const
	Pointer to the value for element i.
constexpr __host__ __device__ DataType *	ptrAt (MDIndexType idx) const
	Pointer to the value for element i.
__host__ __device__ MDSpan< DataType, RemovedFirstExtentsType, LayoutPolicy >	slice (Int32 i) const
	Returns a dimension (N-1) view starting from index element i.
constexpr __host__ __device__ MDSpan< const DataType, Extents, LayoutPolicy >	constSpan () const
constexpr __host__ __device__ MDSpan< const DataType, Extents, LayoutPolicy >	constMDSpan () const
constexpr __host__ __device__ Span< DataType >	to1DSpan () const
constexpr SmallSpan< DataType >	to1DSmallSpan ()
constexpr SmallSpan< const DataType >	to1DSmallSpan () const
constexpr SmallSpan< const DataType >	to1DConstSmallSpan () const

Friends
class	NumArray< UnqualifiedValueType, Extents, LayoutPolicy >
class	MDSpan< const UnqualifiedValueType, Extents, LayoutPolicy >

Detailed Description

template<typename DataType, typename Extents, typename LayoutPolicy>
class Arcane::MDSpan< DataType, Extents, LayoutPolicy >

Base class for multi-dimensional views.

This class is inspired by the std::mdspan class currently being defined (see http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p0009r12.html)

This class is used to manage views on arrays such as NumArray. The methods of this class are accessible on the accelerator.

For more information, refer to the page Usage of the NumArray class.

Definition at line 43 of file arccore/src/base/arccore/base/MDSpan.h.

Member Typedef Documentation

◆ ArrayBoundsIndexType

template<typename DataType, typename Extents, typename LayoutPolicy>

using Arcane::MDSpan< DataType, Extents, LayoutPolicy >::ArrayBoundsIndexType = typename Extents::MDIndexType

Definition at line 64 of file arccore/src/base/arccore/base/MDSpan.h.

◆ ArrayExtentsWithOffsetType

template<typename DataType, typename Extents, typename LayoutPolicy>

using Arcane::MDSpan< DataType, Extents, LayoutPolicy >::ArrayExtentsWithOffsetType = ArrayExtentsWithOffset<Extents, LayoutPolicy>

Definition at line 59 of file arccore/src/base/arccore/base/MDSpan.h.

◆ DynamicDimsType

template<typename DataType, typename Extents, typename LayoutPolicy>

using Arcane::MDSpan< DataType, Extents, LayoutPolicy >::DynamicDimsType = typename Extents::DynamicDimsType

Definition at line 60 of file arccore/src/base/arccore/base/MDSpan.h.

◆ ExtentsType

template<typename DataType, typename Extents, typename LayoutPolicy>

using Arcane::MDSpan< DataType, Extents, LayoutPolicy >::ExtentsType = Extents

Definition at line 55 of file arccore/src/base/arccore/base/MDSpan.h.

◆ IndexType

template<typename DataType, typename Extents, typename LayoutPolicy>

using Arcane::MDSpan< DataType, Extents, LayoutPolicy >::IndexType = typename Extents::MDIndexType

Definition at line 65 of file arccore/src/base/arccore/base/MDSpan.h.

◆ LayoutPolicyType

template<typename DataType, typename Extents, typename LayoutPolicy>

using Arcane::MDSpan< DataType, Extents, LayoutPolicy >::LayoutPolicyType = LayoutPolicy

Definition at line 56 of file arccore/src/base/arccore/base/MDSpan.h.

◆ LoopIndexType

template<typename DataType, typename Extents, typename LayoutPolicy>

using Arcane::MDSpan< DataType, Extents, LayoutPolicy >::LoopIndexType = MDIndexType

Definition at line 58 of file arccore/src/base/arccore/base/MDSpan.h.

◆ MDIndexType

template<typename DataType, typename Extents, typename LayoutPolicy>

using Arcane::MDSpan< DataType, Extents, LayoutPolicy >::MDIndexType = typename Extents::MDIndexType

Definition at line 57 of file arccore/src/base/arccore/base/MDSpan.h.

◆ RemovedFirstExtentsType

template<typename DataType, typename Extents, typename LayoutPolicy>

using Arcane::MDSpan< DataType, Extents, LayoutPolicy >::RemovedFirstExtentsType = typename Extents::RemovedFirstExtentsType

Definition at line 61 of file arccore/src/base/arccore/base/MDSpan.h.

◆ value_type

template<typename DataType, typename Extents, typename LayoutPolicy>

using Arcane::MDSpan< DataType, Extents, LayoutPolicy >::value_type = DataType

Definition at line 54 of file arccore/src/base/arccore/base/MDSpan.h.

Constructor & Destructor Documentation

◆ MDSpan() [1/5]

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ Arcane::MDSpan< DataType, Extents, LayoutPolicy >::MDSpan	(	DataType *	ptr,
		ArrayExtentsWithOffsetType	extents )

inlineconstexpr

Definition at line 70 of file arccore/src/base/arccore/base/MDSpan.h.

◆ MDSpan() [2/5]

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ Arcane::MDSpan< DataType, Extents, LayoutPolicy >::MDSpan	(	DataType *	ptr,
		const DynamicDimsType &	dims )

inlineconstexpr

Definition at line 75 of file arccore/src/base/arccore/base/MDSpan.h.

◆ MDSpan() [3/5]

template<typename DataType, typename Extents, typename LayoutPolicy>

template<typename X, typename = std::enable_if_t<std::is_same_v<X, UnqualifiedValueType>>>

__host__ __device__ Arcane::MDSpan< DataType, Extents, LayoutPolicy >::MDSpan ( const MDSpan< X, Extents > & rhs )

inlineconstexpr

Definition at line 81 of file arccore/src/base/arccore/base/MDSpan.h.

◆ MDSpan() [4/5]

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ Arcane::MDSpan< DataType, Extents, LayoutPolicy >::MDSpan ( SmallSpan< DataType > v )

inlineconstexpr

Definition at line 85 of file arccore/src/base/arccore/base/MDSpan.h.

◆ MDSpan() [5/5]

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ Arcane::MDSpan< DataType, Extents, LayoutPolicy >::MDSpan ( SmallSpan< const DataType > v )

inlineconstexpr

Definition at line 89 of file arccore/src/base/arccore/base/MDSpan.h.

Member Function Documentation

◆ _internalData() [1/2]

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ DataType * Arcane::MDSpan< DataType, Extents, LayoutPolicy >::_internalData ( )

inlineconstexpr

Definition at line 108 of file arccore/src/base/arccore/base/MDSpan.h.

◆ _internalData() [2/2]

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ const DataType * Arcane::MDSpan< DataType, Extents, LayoutPolicy >::_internalData ( ) const

inlineconstexpr

Definition at line 109 of file arccore/src/base/arccore/base/MDSpan.h.

◆ constMDSpan()

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ MDSpan< const DataType, Extents, LayoutPolicy > Arcane::MDSpan< DataType, Extents, LayoutPolicy >::constMDSpan ( ) const

inlineconstexpr

Definition at line 244 of file arccore/src/base/arccore/base/MDSpan.h.

◆ constSpan()

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ MDSpan< const DataType, Extents, LayoutPolicy > Arcane::MDSpan< DataType, Extents, LayoutPolicy >::constSpan ( ) const

inlineconstexpr

Definition at line 239 of file arccore/src/base/arccore/base/MDSpan.h.

◆ extent0()

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ Int32 Arcane::MDSpan< DataType, Extents, LayoutPolicy >::extent0 ( ) const

inlineconstexpr

Value of the first dimension.

Definition at line 125 of file arccore/src/base/arccore/base/MDSpan.h.

◆ extent1()

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ Int32 Arcane::MDSpan< DataType, Extents, LayoutPolicy >::extent1 ( ) const

inlineconstexpr

Value of the second dimension.

Definition at line 127 of file arccore/src/base/arccore/base/MDSpan.h.

◆ extent2()

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ Int32 Arcane::MDSpan< DataType, Extents, LayoutPolicy >::extent2 ( ) const

inlineconstexpr

Value of the third dimension.

Definition at line 129 of file arccore/src/base/arccore/base/MDSpan.h.

◆ extent3()

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ Int32 Arcane::MDSpan< DataType, Extents, LayoutPolicy >::extent3 ( ) const

inlineconstexpr

Value of the fourth dimension.

Definition at line 131 of file arccore/src/base/arccore/base/MDSpan.h.

◆ extents()

template<typename DataType, typename Extents, typename LayoutPolicy>

ArrayExtents< Extents > Arcane::MDSpan< DataType, Extents, LayoutPolicy >::extents ( ) const

inline

Definition at line 113 of file arccore/src/base/arccore/base/MDSpan.h.

◆ extentsWithOffset()

template<typename DataType, typename Extents, typename LayoutPolicy>

ArrayExtentsWithOffsetType Arcane::MDSpan< DataType, Extents, LayoutPolicy >::extentsWithOffset ( ) const

inline

Definition at line 117 of file arccore/src/base/arccore/base/MDSpan.h.

◆ offset() [1/5]

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ Int64 Arcane::MDSpan< DataType, Extents, LayoutPolicy >::offset ( Int32 i ) const

inlineconstexpr

Value for element i.

Definition at line 151 of file arccore/src/base/arccore/base/MDSpan.h.

◆ offset() [2/5]

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ Int64 Arcane::MDSpan< DataType, Extents, LayoutPolicy >::offset	(	Int32	i,
		Int32	j ) const

inlineconstexpr

Value for element i,j.

Definition at line 146 of file arccore/src/base/arccore/base/MDSpan.h.

◆ offset() [3/5]

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ Int64 Arcane::MDSpan< DataType, Extents, LayoutPolicy >::offset	(	Int32	i,
		Int32	j,
		Int32	k ) const

inlineconstexpr

Value for element i,j,k.

Definition at line 141 of file arccore/src/base/arccore/base/MDSpan.h.

◆ offset() [4/5]

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ Int64 Arcane::MDSpan< DataType, Extents, LayoutPolicy >::offset	(	Int32	i,
		Int32	j,
		Int32	k,
		Int32	l ) const

inlineconstexpr

Value for element i,j,k,l.

Definition at line 136 of file arccore/src/base/arccore/base/MDSpan.h.

◆ offset() [5/5]

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ Int64 Arcane::MDSpan< DataType, Extents, LayoutPolicy >::offset ( MDIndexType idx ) const

inlineconstexpr

Value for element idx.

Definition at line 154 of file arccore/src/base/arccore/base/MDSpan.h.

◆ operator()() [1/5]

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ DataType & Arcane::MDSpan< DataType, Extents, LayoutPolicy >::operator() ( Int32 i ) const

inlineconstexpr

Value for element i.

Definition at line 177 of file arccore/src/base/arccore/base/MDSpan.h.

◆ operator()() [2/5]

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ DataType & Arcane::MDSpan< DataType, Extents, LayoutPolicy >::operator()	(	Int32	i,
		Int32	j ) const

inlineconstexpr

Value for element i,j.

Definition at line 172 of file arccore/src/base/arccore/base/MDSpan.h.

◆ operator()() [3/5]

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ DataType & Arcane::MDSpan< DataType, Extents, LayoutPolicy >::operator()	(	Int32	i,
		Int32	j,
		Int32	k ) const

inline

Value for element i,j,k.

Definition at line 167 of file arccore/src/base/arccore/base/MDSpan.h.

◆ operator()() [4/5]

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ DataType & Arcane::MDSpan< DataType, Extents, LayoutPolicy >::operator()	(	Int32	i,
		Int32	j,
		Int32	k,
		Int32	l ) const

inlineconstexpr

Value for element i,j,k,l.

Definition at line 162 of file arccore/src/base/arccore/base/MDSpan.h.

◆ operator()() [5/5]

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ DataType & Arcane::MDSpan< DataType, Extents, LayoutPolicy >::operator() ( MDIndexType idx ) const

inlineconstexpr

Value for element idx.

Definition at line 182 of file arccore/src/base/arccore/base/MDSpan.h.

◆ operator=() [1/2]

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ ThatClass & Arcane::MDSpan< DataType, Extents, LayoutPolicy >::operator= ( SmallSpan< const DataType > v )

inlineconstexpr

Definition at line 99 of file arccore/src/base/arccore/base/MDSpan.h.

◆ operator=() [2/2]

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ ThatClass & Arcane::MDSpan< DataType, Extents, LayoutPolicy >::operator= ( SmallSpan< DataType > v )

inlineconstexpr

Definition at line 93 of file arccore/src/base/arccore/base/MDSpan.h.

◆ operator[]()

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ DataType Arcane::MDSpan< DataType, Extents, LayoutPolicy >::operator[] ( Int32 i ) const

inlineconstexpr

Value for element i.

Definition at line 179 of file arccore/src/base/arccore/base/MDSpan.h.

◆ ptrAt() [1/5]

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ DataType * Arcane::MDSpan< DataType, Extents, LayoutPolicy >::ptrAt ( Int32 i ) const

inlineconstexpr

Pointer to the value for element i.

Definition at line 205 of file arccore/src/base/arccore/base/MDSpan.h.

◆ ptrAt() [2/5]

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ DataType * Arcane::MDSpan< DataType, Extents, LayoutPolicy >::ptrAt	(	Int32	i,
		Int32	j ) const

inlineconstexpr

Pointer to the value for element i,j.

Definition at line 200 of file arccore/src/base/arccore/base/MDSpan.h.

◆ ptrAt() [3/5]

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ DataType * Arcane::MDSpan< DataType, Extents, LayoutPolicy >::ptrAt	(	Int32	i,
		Int32	j,
		Int32	k ) const

inline

Pointer to the value for element i,j,k.

Definition at line 195 of file arccore/src/base/arccore/base/MDSpan.h.

◆ ptrAt() [4/5]

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ DataType * Arcane::MDSpan< DataType, Extents, LayoutPolicy >::ptrAt	(	Int32	i,
		Int32	j,
		Int32	k,
		Int32	l ) const

inlineconstexpr

Pointer to the value for element i,j,k,l.

Definition at line 190 of file arccore/src/base/arccore/base/MDSpan.h.

Referenced by Arcane::MDSpan< DataType, Extents, RightLayout >::slice().

◆ ptrAt() [5/5]

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ DataType * Arcane::MDSpan< DataType, Extents, LayoutPolicy >::ptrAt ( MDIndexType idx ) const

inlineconstexpr

Pointer to the value for element i.

Definition at line 208 of file arccore/src/base/arccore/base/MDSpan.h.

◆ slice()

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ MDSpan< DataType, RemovedFirstExtentsType, LayoutPolicy > Arcane::MDSpan< DataType, Extents, LayoutPolicy >::slice ( Int32 i ) const

inline

Returns a dimension (N-1) view starting from index element i.

For example:

MDSpan<Real, MDDim3> span3 = ...;
MDSpan<Real, MDDim2> sliced_span = span3.slice(5);
// sliced_span(i,i) <=> span3(5,i,j);

Warning: This is only valid if LayoutPolicy is RightLayout.

Definition at line 228 of file arccore/src/base/arccore/base/MDSpan.h.

◆ to1DConstSmallSpan()

template<typename DataType, typename Extents, typename LayoutPolicy>

SmallSpan< const DataType > Arcane::MDSpan< DataType, Extents, LayoutPolicy >::to1DConstSmallSpan ( ) const

inlineconstexpr

Definition at line 262 of file arccore/src/base/arccore/base/MDSpan.h.

◆ to1DSmallSpan() [1/2]

template<typename DataType, typename Extents, typename LayoutPolicy>

SmallSpan< DataType > Arcane::MDSpan< DataType, Extents, LayoutPolicy >::to1DSmallSpan ( )

inlineconstexpr

Definition at line 254 of file arccore/src/base/arccore/base/MDSpan.h.

◆ to1DSmallSpan() [2/2]

template<typename DataType, typename Extents, typename LayoutPolicy>

SmallSpan< const DataType > Arcane::MDSpan< DataType, Extents, LayoutPolicy >::to1DSmallSpan ( ) const

inlineconstexpr

Definition at line 258 of file arccore/src/base/arccore/base/MDSpan.h.

◆ to1DSpan()

template<typename DataType, typename Extents, typename LayoutPolicy>

__host__ __device__ Span< DataType > Arcane::MDSpan< DataType, Extents, LayoutPolicy >::to1DSpan ( ) const

inlineconstexpr

Definition at line 249 of file arccore/src/base/arccore/base/MDSpan.h.

◆ MDSpan< const UnqualifiedValueType, Extents, LayoutPolicy >

template<typename DataType, typename Extents, typename LayoutPolicy>

friend class MDSpan< const UnqualifiedValueType, Extents, LayoutPolicy >

friend

Definition at line 1 of file arccore/src/base/arccore/base/MDSpan.h.

◆ NumArray< UnqualifiedValueType, Extents, LayoutPolicy >

template<typename DataType, typename Extents, typename LayoutPolicy>

friend class NumArray< UnqualifiedValueType, Extents, LayoutPolicy >

friend

Definition at line 1 of file arccore/src/base/arccore/base/MDSpan.h.

The documentation for this class was generated from the following files:

Public Types

Public Member Functions

Friends

Detailed Description

Member Typedef Documentation

◆ ArrayBoundsIndexType

◆ ArrayExtentsWithOffsetType

◆ DynamicDimsType

◆ ExtentsType

◆ IndexType

◆ LayoutPolicyType

◆ LoopIndexType

◆ MDIndexType

◆ RemovedFirstExtentsType

◆ value_type

Constructor & Destructor Documentation

◆ MDSpan() [1/5]

◆ MDSpan() [2/5]

◆ MDSpan() [3/5]

◆ MDSpan() [4/5]

◆ MDSpan() [5/5]

Member Function Documentation

◆ _internalData() [1/2]

◆ _internalData() [2/2]

◆ constMDSpan()

◆ constSpan()

◆ extent0()

◆ extent1()

◆ extent2()

◆ extent3()

◆ extents()

◆ extentsWithOffset()

◆ offset() [1/5]

◆ offset() [2/5]

◆ offset() [3/5]

◆ offset() [4/5]

◆ offset() [5/5]

◆ operator()() [1/5]

◆ operator()() [2/5]

◆ operator()() [3/5]

◆ operator()() [4/5]

◆ operator()() [5/5]

◆ operator=() [1/2]

◆ operator=() [2/2]

◆ operator[]()

◆ ptrAt() [1/5]

◆ ptrAt() [2/5]

◆ ptrAt() [3/5]

◆ ptrAt() [4/5]

◆ ptrAt() [5/5]

◆ slice()

◆ to1DConstSmallSpan()

◆ to1DSmallSpan() [1/2]

◆ to1DSmallSpan() [2/2]

◆ to1DSpan()

Friends And Related Symbol Documentation

◆ MDSpan< const UnqualifiedValueType, Extents, LayoutPolicy >

◆ NumArray< UnqualifiedValueType, Extents, LayoutPolicy >