Template Numerical Library: TNL::Containers::VectorView< Real, Device, Index

VectorView extends ArrayView with algebraic operations. More...

#include <TNL/Containers/VectorView.h>

Inheritance diagram for TNL::Containers::VectorView< Real, Device, Index >:

Collaboration diagram for TNL::Containers::VectorView< Real, Device, Index >:

Public Types
using	ConstViewType = VectorView< std::add_const_t< Real >, Device, Index >
	Compatible constant VectorView type.

using	DeviceType = Device
	Device used to run operations on the vector.

using	IndexType = Index
	Type being used for the vector elements indexing.

using	RealType = Real
	Type of elements stored in this vector.

template<typename _Real , typename _Device = Device, typename _Index = Index>
using	Self = VectorView< _Real, _Device, _Index >
	A template which allows to quickly obtain a VectorView type with changed template parameters.

using	ViewType = VectorView< Real, Device, Index >
	Compatible VectorView type.

Public Types inherited from TNL::Containers::ArrayView< double, Devices::Host, int >
using	ConstViewType
	Compatible constant ArrayView type.

using	DeviceType
	Device used to run operations on the array.

using	IndexType
	Type being used for the array elements indexing.

using	Self
	A template which allows to quickly obtain an ArrayView type with changed template parameters.

using	ValueType
	Type of elements stored in this array.

using	ViewType
	Compatible ArrayView type.

Public Member Functions
__cuda_callable__	VectorView ()=default
	Constructs an empty vector view.

template<typename Real_ >
__cuda_callable__	VectorView (const ArrayView< Real_, Device, Index > &view)
	Constructor for the initialization by a base class object.

__cuda_callable__	VectorView (const VectorView &view)=default
	Shallow copy constructor.

__cuda_callable__	VectorView (RealType *data, IndexType size)
	Constructs a vector view by binding to the given data pointer and size.

__cuda_callable__	VectorView (VectorView &&view) noexcept=default
	Move constructor for initialization from rvalues.

__cuda_callable__ ConstViewType	getConstView (IndexType begin=0, IndexType end=0) const
	Returns a non-modifiable view of the vector view.

__cuda_callable__ ViewType	getView (IndexType begin=0, IndexType end=0)
	Returns a modifiable view of the vector view.

template<typename VectorExpression >
VectorView &	operator%= (const VectorExpression &expression)
	Modulo assignment operator for vector view and a vector expression.

template<typename VectorExpression >
VectorView< Real, Device, Index > &	operator%= (const VectorExpression &expression)

template<typename VectorExpression >
VectorView &	operator*= (const VectorExpression &expression)
	Multiplies elements of this vector view and a vector expression and stores the result in this vector view.

template<typename VectorExpression >
VectorView< Real, Device, Index > &	*operator=** (const VectorExpression &expression)

template<typename VectorExpression >
VectorView &	operator+= (const VectorExpression &expression)
	Adds elements of this vector view and a vector expression and stores the result in this vector view.

template<typename VectorExpression >
VectorView< Real, Device, Index > &	operator+= (const VectorExpression &expression)

template<typename VectorExpression >
VectorView &	operator-= (const VectorExpression &expression)
	Subtracts elements of this vector view and a vector expression and stores the result in this vector view.

template<typename VectorExpression >
VectorView< Real, Device, Index > &	operator-= (const VectorExpression &expression)

template<typename VectorExpression >
VectorView &	operator/= (const VectorExpression &expression)
	Divides elements of this vector view and a vector expression and stores the result in this vector view.

template<typename VectorExpression >
VectorView< Real, Device, Index > &	operator/= (const VectorExpression &expression)

template<typename T , typename... , typename = std::enable_if_t< std::is_convertible_v< T, Real > \|\| IsArrayType< T >::value >>
ArrayView< Real, Device, Index > &	operator= (const T &data)
	Assigns a value or an array - same as ArrayView::operator=.

template<typename VectorExpression , typename... , typename = std::enable_if_t< Expressions::HasEnabledExpressionTemplates< VectorExpression >::value && ! IsArrayType< VectorExpression >::value >>
VectorView &	operator= (const VectorExpression &expression)
	Assigns a vector expression to this vector view.

template<typename VectorExpression , typename... , typename >
VectorView< Real, Device, Index > &	operator= (const VectorExpression &expression)

VectorView &	operator= (const VectorView &view)=default
	Deep copy assignment operator - same as ArrayView::operator=.

Public Member Functions inherited from TNL::Containers::ArrayView< double, Devices::Host, int >
__cuda_callable__	ArrayView ()=default
	Constructs an empty array view.

__cuda_callable__	ArrayView (ArrayView &&view) noexcept=default
	Move constructor for initialization from rvalues.

__cuda_callable__	ArrayView (const ArrayView &view)=default
	Shallow copy constructor.

__cuda_callable__	ArrayView (const ArrayView< Value_, Devices::Host, int > &view)
	"Templated" shallow copy constructor.

__cuda_callable__	ArrayView (ValueType *data, IndexType size)
	Constructs an array view by binding to the given data pointer and size.

__cuda_callable__ void	bind (ArrayView view)
	Method for rebinding (reinitialization) using another array view.

__cuda_callable__ void	bind (ValueType *data, IndexType size)
	Method for rebinding (reinitialization) using a raw pointer and size.

__cuda_callable__ bool	empty () const
	Returns true if the current array view size is zero.

void	forAllElements (Function &&f)
	Process the lambda function f for each array element.

void	forAllElements (Function &&f) const
	Process the lambda function f for each array element for constant instances.

void	forElements (IndexType begin, IndexType end, Function &&f)
	Process the lambda function f for each array element in interval [ begin, end).

void	forElements (IndexType begin, IndexType end, Function &&f) const
	Process the lambda function f for each array element in interval [ begin, end) for constant instances of the array.

__cuda_callable__ ValueType *	getArrayData ()
	Returns a raw pointer to the data.

__cuda_callable__ const ValueType *	getArrayData () const
	Returns a const-qualified raw pointer to the data.

__cuda_callable__ ConstViewType	getConstView (IndexType begin=0, IndexType end=0) const
	Returns a non-modifiable view of the array view.

__cuda_callable__ ValueType *	getData ()
	Returns a raw pointer to the data.

__cuda_callable__ const ValueType *	getData () const
	Returns a const-qualified raw pointer to the data.

__cuda_callable__ ValueType	getElement (IndexType i) const
	Returns the value of the i-th element.

__cuda_callable__ IndexType	getSize () const
	Returns the current size of the array view.

__cuda_callable__ ViewType	getView (IndexType begin=0, IndexType end=0)
	Returns a modifiable view of the array view.

void	load (const std::string &fileName)
	Method for loading the data from a binary file fileName.

bool	operator!= (const ArrayT &array) const
	Compares the array view with another array-like container.

__cuda_callable__ double &	operator() (IndexType i)
	Accesses the i-th element of the array.

__cuda_callable__ const double &	operator() (IndexType i) const
	Accesses the i-th element of the array.

ArrayView &	operator= (const ArrayView &view)
	Deep copy assignment operator for copying data from another array view.

ArrayView &	operator= (const T &data)
	Assigns either array-like container or a single value.

ArrayView< double, Devices::Host, int > &	operator= (const T &data)

bool	operator== (const ArrayT &array) const
	Compares the array view with another array-like container.

__cuda_callable__ double &	operator[] (IndexType i)
	Accesses the i-th element of the array view.

__cuda_callable__ const double &	operator[] (IndexType i) const
	Accesses the i-th element of the array view.

__cuda_callable__ void	reset ()

void	save (const std::string &fileName) const
	Method for saving the data to a binary file fileName.

__cuda_callable__ void	setElement (IndexType i, ValueType value)
	Sets the value of the i-th element to v.

void	setValue (ValueType value, IndexType begin=0, IndexType end=0)
	Sets elements of the array view to given value.

__cuda_callable__ void	swap (ArrayView &view)
	Swaps this array view with another.

Additional Inherited Members
Protected Attributes inherited from TNL::Containers::ArrayView< double, Devices::Host, int >
ValueType *	data
	Pointer to the data.

IndexType	size
	Array view size.

Detailed Description

template<typename Real = double, typename Device = Devices::Host, typename Index = int>
class TNL::Containers::VectorView< Real, Device, Index >

VectorView extends ArrayView with algebraic operations.

The template parameters have the same meaning as in ArrayView, with Real corresponding to ArrayView's Value parameter.

Template Parameters

Real	An arithmetic type for the vector values, e.g. `float` or `double`.
Device	The device to be used for the execution of vector operations.
Index	The indexing type.

Member Typedef Documentation

◆ DeviceType

template<typename Real = double, typename Device = Devices::Host, typename Index = int>

using TNL::Containers::VectorView< Real, Device, Index >::DeviceType = Device

Device used to run operations on the vector.

See TNL::Devices for the available options.

Constructor & Destructor Documentation

◆ VectorView() [1/4]

template<typename Real = double, typename Device = Devices::Host, typename Index = int>

__cuda_callable__ TNL::Containers::VectorView< Real, Device, Index >::VectorView	(	RealType *	data,
		IndexType	size )

inline

Constructs a vector view by binding to the given data pointer and size.

This method can be called from device kernels.

Parameters

data	The data pointer to be bound.
size	The number of elements in the vector view.

◆ VectorView() [2/4]

template<typename Real = double, typename Device = Devices::Host, typename Index = int>

__cuda_callable__ TNL::Containers::VectorView< Real, Device, Index >::VectorView ( )

default

Constructs an empty vector view.

This method can be called from device kernels.

◆ VectorView() [3/4]

template<typename Real = double, typename Device = Devices::Host, typename Index = int>

__cuda_callable__ TNL::Containers::VectorView< Real, Device, Index >::VectorView ( const VectorView< Real, Device, Index > & view )

default

Shallow copy constructor.

This method can be called from device kernels.

Parameters

view	The vector view to be copied.

◆ VectorView() [4/4]

template<typename Real = double, typename Device = Devices::Host, typename Index = int>

__cuda_callable__ TNL::Containers::VectorView< Real, Device, Index >::VectorView ( VectorView< Real, Device, Index > && view )

defaultnoexcept

Move constructor for initialization from rvalues.

This method can be called from device kernels.

Parameters

view	The vector view to be moved.

Member Function Documentation

◆ getConstView()

template<typename Real , typename Device , typename Index >

__cuda_callable__ VectorView< Real, Device, Index >::ConstViewType TNL::Containers::VectorView< Real, Device, Index >::getConstView	(	IndexType	begin = 0,
		IndexType	end = 0 ) const

nodiscard

Returns a non-modifiable view of the vector view.

By default, a view for the whole vector is returned. If begin or end is set to a non-zero value, a view only for the sub-interval [begin, end) is returned.

Parameters

begin	The beginning of the vector view sub-interval. It is 0 by default.
end	The end of the vector view sub-interval. The default value is 0 which is, however, replaced with the array size.

◆ getView()

template<typename Real , typename Device , typename Index >

__cuda_callable__ VectorView< Real, Device, Index >::ViewType TNL::Containers::VectorView< Real, Device, Index >::getView	(	IndexType	begin = 0,
		IndexType	end = 0 )

nodiscard

Returns a modifiable view of the vector view.

By default, a view for the whole vector is returned. If begin or end is set to a non-zero value, a view only for the sub-interval [begin, end) is returned.

Parameters

begin	The beginning of the vector view sub-interval. It is 0 by default.
end	The end of the vector view sub-interval. The default value is 0 which is, however, replaced with the array size.

◆ operator%=()

template<typename Real = double, typename Device = Devices::Host, typename Index = int>

template<typename VectorExpression >

VectorView & TNL::Containers::VectorView< Real, Device, Index >::operator%= ( const VectorExpression & expression )

Modulo assignment operator for vector view and a vector expression.

The division is evaluated element-wise. The vector expression must either evaluate to a scalar or a vector of the same size as this vector view.

Parameters

expression Reference to a vector expression.

Returns: Reference to this vector.

◆ operator*=()

template<typename Real = double, typename Device = Devices::Host, typename Index = int>

template<typename VectorExpression >

VectorView & TNL::Containers::VectorView< Real, Device, Index >::operator*= ( const VectorExpression & expression )

Multiplies elements of this vector view and a vector expression and stores the result in this vector view.

The multiplication is evaluated element-wise. The vector expression must either evaluate to a scalar or a vector of the same size as this vector view.

Parameters

expression Reference to a vector expression.

Returns: Reference to this vector view.

◆ operator+=()

template<typename Real = double, typename Device = Devices::Host, typename Index = int>

template<typename VectorExpression >

VectorView & TNL::Containers::VectorView< Real, Device, Index >::operator+= ( const VectorExpression & expression )

Adds elements of this vector view and a vector expression and stores the result in this vector view.

The addition is evaluated element-wise. The vector expression must either evaluate to a scalar or a vector of the same size as this vector view.

Parameters

expression Reference to a vector expression.

Returns: Reference to this vector view.

◆ operator-=()

template<typename Real = double, typename Device = Devices::Host, typename Index = int>

template<typename VectorExpression >

VectorView & TNL::Containers::VectorView< Real, Device, Index >::operator-= ( const VectorExpression & expression )

Subtracts elements of this vector view and a vector expression and stores the result in this vector view.

The subtraction is evaluated element-wise. The vector expression must either evaluate to a scalar or a vector of the same size as this vector view.

Parameters

expression Reference to a vector expression.

Returns: Reference to this vector view.

◆ operator/=()

template<typename Real = double, typename Device = Devices::Host, typename Index = int>

template<typename VectorExpression >

VectorView & TNL::Containers::VectorView< Real, Device, Index >::operator/= ( const VectorExpression & expression )

Divides elements of this vector view and a vector expression and stores the result in this vector view.

The division is evaluated element-wise. The vector expression must either evaluate to a scalar or a vector of the same size as this vector view.

Parameters

expression Reference to a vector expression.

Returns: Reference to this vector view.

◆ operator=() [1/3]

template<typename Real = double, typename Device = Devices::Host, typename Index = int>

template<typename T , typename... , typename = std::enable_if_t< std::is_convertible_v< T, Real > || IsArrayType< T >::value >>

ArrayView< Real, Device, Index > & TNL::Containers::VectorView< Real, Device, Index >::operator= ( const T & data )

inline

Assigns a value or an array - same as ArrayView::operator=.

Template Parameters

T	The type of the source array or value.

Parameters

data	Reference to the source array or value.

Returns: Reference to this vector view.

◆ operator=() [2/3]

template<typename Real = double, typename Device = Devices::Host, typename Index = int>

template<typename VectorExpression , typename... , typename = std::enable_if_t< Expressions::HasEnabledExpressionTemplates< VectorExpression >::value && ! IsArrayType< VectorExpression >::value >>

VectorView & TNL::Containers::VectorView< Real, Device, Index >::operator= ( const VectorExpression & expression )

Assigns a vector expression to this vector view.

The assignment is evaluated element-wise. The vector expression must either evaluate to a scalar or a vector of the same size as this vector view.

Parameters

expression The vector expression to be evaluated and assigned to this vector view.

Returns: Reference to this vector view.

◆ operator=() [3/3]

template<typename Real = double, typename Device = Devices::Host, typename Index = int>

VectorView & TNL::Containers::VectorView< Real, Device, Index >::operator= ( const VectorView< Real, Device, Index > & view )

default

Deep copy assignment operator - same as ArrayView::operator=.

Parameters

view	Reference to the source vector view.

Returns: Reference to this vector view.

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

src/TNL/Containers/VectorView.h
src/TNL/Containers/VectorView.hpp

Public Types

Public Member Functions

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ DeviceType

Constructor & Destructor Documentation

◆ VectorView() [1/4]

◆ VectorView() [2/4]

◆ VectorView() [3/4]

◆ VectorView() [4/4]

Member Function Documentation

◆ getConstView()

◆ getView()

◆ operator%=()

◆ operator*=()

◆ operator+=()

◆ operator-=()

◆ operator/=()

◆ operator=() [1/3]

◆ operator=() [2/3]

◆ operator=() [3/3]