TNL::Containers::Vector< Real, Device, Index, Allocator > Class Template Reference

Vector extends Array with algebraic operations. More...

#include <TNL/Containers/Vector.h>

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

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

Public Types
using	AllocatorType = Allocator
	Allocator type used for allocating this vector.
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, typename _Allocator = typename Allocators::Default< _Device >::template Allocator< _Real >>
using	Self = Vector< _Real, _Device, _Index, _Allocator >
	A template which allows to quickly obtain a Vector type with changed template parameters.
using	ViewType = VectorView< Real, Device, Index >
	Compatible VectorView type.
Public Types inherited from TNL::Containers::Array< double, Devices::Host, int, typename Allocators::Default< Devices::Host >::template Allocator< double > >
using	AllocatorType
	Allocator type used for allocating this array.
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 Array type with changed template parameters.
using	ValueType
	Type of elements stored in this array.
using	ViewType
	Compatible ArrayView type.

Public Member Functions
	Vector ()=default
	Constructs an empty array with zero size.
	Vector (const Vector &)=default
	Copy constructor (makes a deep copy).
	Vector (const Vector &vector, const AllocatorType &allocator)
	Copy constructor with a specific allocator (makes a deep copy).
template<typename VectorExpression, typename..., typename = std::enable_if_t< Expressions::HasEnabledExpressionTemplates< VectorExpression >::value && ! IsArrayType< VectorExpression >::value >>
	Vector (const VectorExpression &expression)
	Constructor from expression template.
	Vector (Vector &&) noexcept=default
	Default move constructor.
ConstViewType	getConstView (IndexType begin=0, IndexType end=0) const
	Returns a non-modifiable view of the vector.
ViewType	getView (IndexType begin=0, IndexType end=0)
	Returns a modifiable view of the vector.
	operator ConstViewType () const
	Conversion operator to a non-modifiable view of the vector.
	operator ViewType ()
	Conversion operator to a modifiable view of the vector.
template<typename VectorExpression>
Vector &	operator%= (const VectorExpression &expression)
	Modulo assignment operator for vector and a vector expression.
template<typename VectorExpression>
Vector &	operator*= (const VectorExpression &expression)
	Multiplies elements of this vector and a vector expression and stores the result in this vector.
template<typename VectorExpression>
Vector &	operator+= (const VectorExpression &expression)
	Adds elements of this vector and a vector expression and stores the result in this vector.
template<typename VectorExpression>
Vector &	operator-= (const VectorExpression &expression)
	Subtracts elements of this vector and a vector expression and stores the result in this vector.
template<typename VectorExpression>
Vector &	operator/= (const VectorExpression &expression)
	Divides elements of this vector and a vector expression and stores the result in this vector.
template<typename T, typename..., typename = std::enable_if_t< std::is_convertible_v< T, Real > || IsArrayType< T >::value >>
Array< Real, Device, Index, Allocator > &	operator= (const T &data)
	Assigns a value or an array - same as Array::operator=.
Vector &	operator= (const Vector &)=default
	Copy-assignment operator for copying data from another vector.
template<typename VectorExpression, typename..., typename = std::enable_if_t< Expressions::HasEnabledExpressionTemplates< VectorExpression >::value && ! IsArrayType< VectorExpression >::value >>
Vector &	operator= (const VectorExpression &expression)
	Assigns a vector expression to this vector.
Vector &	operator= (Vector &&) noexcept(false)=default
	Move-assignment operator for acquiring data from rvalues.
Public Member Functions inherited from TNL::Containers::Array< double, Devices::Host, int, typename Allocators::Default< Devices::Host >::template Allocator< double > >
	Array ()=default
	Constructs an empty array with zero size.
virtual	~Array ()
	Destructor.
__cuda_callable__ bool	empty () const
	Returns true if the current array size is zero.
void	forAllElements (Function &&f)
	Process the lambda function f for each array element.
void	forElements (IndexType begin, IndexType end, Function &&f)
	Process the lambda function f for each array element in interval [ begin, end).
AllocatorType	getAllocator () const
	Returns the allocator associated with the array.
__cuda_callable__ const double *	getArrayData () const
	Returns a const-qualified raw pointer to the data.
ConstViewType	getConstView (IndexType begin=0, IndexType end=0) const
	Returns a non-modifiable view of the array.
__cuda_callable__ const double *	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 array size.
ViewType	getView (IndexType begin=0, IndexType end=0)
	Returns a modifiable view of the array.
void	load (const String &fileName)
	Method for loading the array from a binary file fileName.
	operator ConstViewType () const
	Conversion operator to a non-modifiable view of the array.
	operator ViewType ()
	Conversion operator to a modifiable view of the array.
bool	operator!= (const ArrayT &array) const
	Compares the array with another array-like container.
__cuda_callable__ double &	operator() (IndexType i)
	Accesses the i-th element of the array.
Array &	operator= (const Array &array)
	Copy-assignment operator for copying data from another array.
bool	operator== (const ArrayT &array) const
	Compares the array with another array-like container.
__cuda_callable__ double &	operator[] (IndexType i)
	Accesses the i-th element of the array.
void	reset ()
	Resets the array to the empty state.
void	resize (IndexType size)
	Method for resizing the array.
void	save (const String &fileName) const
	Method for saving the array to a binary file fileName.
__cuda_callable__ void	setElement (IndexType i, ValueType value)
	Sets the value of the i-th element to v.
void	setLike (const ArrayT &array)
	Sets the same size as the size of an existing array.
void	setSize (IndexType size)
	Method for setting the array size.
void	setValue (ValueType value, IndexType begin=0, IndexType end=0)
	Sets elements of the array to given value.
void	swap (Array &array) noexcept
	Swaps this array with another.

Additional Inherited Members
Static Public Member Functions inherited from TNL::Containers::Array< double, Devices::Host, int, typename Allocators::Default< Devices::Host >::template Allocator< double > >
static std::string	getSerializationType ()
	Returns a string representation of the array type in C++ style, with a placeholder in place of Device and Allocator.
Protected Member Functions inherited from TNL::Containers::Array< double, Devices::Host, int, typename Allocators::Default< Devices::Host >::template Allocator< double > >
void	reallocate (IndexType size)
	Internal method for reallocating array elements. Used only from the two overloads of resize.
void	releaseData ()
	Internal method for releasing (deallocating) array data.
Protected Attributes inherited from TNL::Containers::Array< double, Devices::Host, int, typename Allocators::Default< Devices::Host >::template Allocator< double > >
Allocator	allocator
	The internal allocator instance.
double *	data
	Pointer to the data.
IndexType	size
	Number of elements in the array.

Detailed Description

template<typename Real = double, typename Device = Devices::Host, typename Index = int, typename Allocator = typename Allocators::Default< Device >::template Allocator< Real >>
class TNL::Containers::Vector< Real, Device, Index, Allocator >

Vector extends Array with algebraic operations.

The template parameters have the same meaning as in Array, with Real corresponding to Array'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.
Allocator	The type of the allocator used for the allocation and deallocation of memory used by the array. By default, an appropriate allocator for the specified Device is selected with Allocators::Default.

Example

#include <iostream>
#include <TNL/Containers/Vector.h>
#include <TNL/Containers/Array.h>
#include <TNL/Devices/Host.h>
#include <TNL/Devices/Cuda.h>
 
using namespace TNL;
using namespace std;
 
template< typename Device >
void
VectorExample()
{
   Containers::Vector< int, Device > vector1( 5 );
   vector1 = 0;
 
   Containers::Vector< int, Device > vector2( 3 );
   vector2 = 1;
   vector2.swap( vector1 );
   vector2.setElement( 2, 4 );
 
   cout << "First vector:" << vector1.getData() << endl;
   cout << "Second vector:" << vector2.getData() << endl;
 
   vector2.reset();
   cout << "Second vector after reset:" << vector2.getData() << endl;
 
   Containers::Vector< int, Device > vect = { 1, 2, -3, 3 };
   cout << "The smallest element is:" << min( vect ) << endl;
   cout << "The absolute biggest element is:" << max( abs( vect ) ) << endl;
   cout << "Sum of all vector elements:" << sum( vect ) << endl;
   vect *= 2.0;
   cout << "Vector multiplied by 2:" << vect << endl;
}
 
int
main()
{
   std::cout << "Running vector example on the host system: " << std::endl;
   VectorExample< Devices::Host >();
 
#ifdef __CUDACC__
   std::cout << "Running vector example on the CUDA device: " << std::endl;
   VectorExample< Devices::Cuda >();
#endif
}

Output

Running vector example on the host system: 
First vector:0x55a12640d1f0
Second vector:0x55a12640d1d0
Second vector after reset:0
The smallest element is:-3
The absolute biggest element is:3
Sum of all vector elements:3
Vector multiplied by 2:[ 2, 4, -6, 6 ]
Running vector example on the CUDA device: 
First vector:0x7f146e200200
Second vector:0x7f146e200000
Second vector after reset:0
The smallest element is:-3
The absolute biggest element is:3
Sum of all vector elements:3
Vector multiplied by 2:[ 2, 4, -6, 6 ]

Member Typedef Documentation

AllocatorType

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

using TNL::Containers::Vector< Real, Device, Index, Allocator >::AllocatorType = Allocator

Allocator type used for allocating this vector.

See TNL::Allocators.

DeviceType

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

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

Device used to run operations on the vector.

See TNL::Devices for the available options.

Constructor & Destructor Documentation

Vector()

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

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

TNL::Containers::Vector< Real, Device, Index, Allocator >::Vector ( const VectorExpression & expression )

explicit

Constructor from expression template.

Parameters

expression

input expression template

Member Function Documentation

getConstView()

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

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

nodiscard

Returns a non-modifiable view of the vector.

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

getView()

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

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

nodiscard

Returns a modifiable view of the vector.

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 sub-interval. It is 0 by default.
end	The end of the vector 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, typename Allocator = typename Allocators::Default< Device >::template Allocator< Real >>

template<typename VectorExpression>

Vector & TNL::Containers::Vector< Real, Device, Index, Allocator >::operator%=

(

const VectorExpression &

expression

)

Modulo assignment operator for vector 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.

Parameters

expression

Reference to a vector expression.

Returns

Reference to this vector.

operator*=()

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

template<typename VectorExpression>

Vector & TNL::Containers::Vector< Real, Device, Index, Allocator >::operator*=

(

const VectorExpression &

expression

)

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

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.

Parameters

expression

Reference to a vector expression.

Returns

Reference to this vector.

operator+=()

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

template<typename VectorExpression>

Vector & TNL::Containers::Vector< Real, Device, Index, Allocator >::operator+=

(

const VectorExpression &

expression

)

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

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.

Parameters

expression

Reference to a vector expression.

Returns

Reference to this vector.

operator-=()

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

template<typename VectorExpression>

Vector & TNL::Containers::Vector< Real, Device, Index, Allocator >::operator-=

(

const VectorExpression &

expression

)

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

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.

Parameters

expression

Reference to a vector expression.

Returns

Reference to this vector.

operator/=()

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

template<typename VectorExpression>

Vector & TNL::Containers::Vector< Real, Device, Index, Allocator >::operator/=

(

const VectorExpression &

expression

)

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

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.

Parameters

expression

Reference to a vector expression.

Returns

Reference to this vector.

operator=() [1/2]

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

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

Array< Real, Device, Index, Allocator > & TNL::Containers::Vector< Real, Device, Index, Allocator >::operator= ( const T & data )

inline

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

Returns

Reference to this vector.

operator=() [2/2]

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

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

Vector & TNL::Containers::Vector< Real, Device, Index, Allocator >::operator=

(

const VectorExpression &

expression

)

Assigns a vector expression to this vector.

The assignment is evaluated element-wise. The vector expression must either evaluate to a scalar or a vector. If it evaluates to a vector with a different size than this vector, this vector is reallocated to match the size of the vector expression.

Parameters

expression

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

Returns

Reference to this vector.

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

• src/TNL/Containers/Vector.h