SparseMatrixIterators::Accessor< number, Constness > Class Template Reference

#include <deal.II/lac/sparse_matrix.h>

Inheritance diagram for SparseMatrixIterators::Accessor< number, Constness >:

Public Types
using	size_type = SparsityPatternIterators::size_type

Public Member Functions
number	value () const
number &	value ()
const SparseMatrix< number > &	get_matrix () const
size_type	row () const
size_type	index () const
size_type	global_index () const
size_type	column () const
bool	is_valid_entry () const
bool	operator== (const Accessor &) const
bool	operator< (const Accessor &) const

Protected Member Functions
void	advance ()

Static Protected Member Functions
static ::ExceptionBase &	DummyAccessor ()

Protected Attributes
const SparsityPattern *	container
std::size_t	linear_index

Detailed Description

template<typename number, bool Constness>
class SparseMatrixIterators::Accessor< number, Constness >

General template for sparse matrix accessors. The first template argument denotes the underlying numeric type, the second the constness of the matrix.

The general template is not implemented, only the specializations for the two possible values of the second template argument. Therefore, the interface listed here only serves as a template provided since doxygen does not link the specializations.

Definition at line 96 of file sparse_matrix.h.

Member Typedef Documentation

size_type

using SparsityPatternIterators::Accessor::size_type = SparsityPatternIterators::size_type

inherited

Size type of SparsityPattern.

Definition at line 138 of file sparsity_pattern.h.

Member Function Documentation

value() [1/2]

template<typename number , bool Constness>

number SparseMatrixIterators::Accessor< number, Constness >::value

(

)

const

Value of this matrix entry.

value() [2/2]

template<typename number , bool Constness>

number & SparseMatrixIterators::Accessor< number, Constness >::value

(

)

Value of this matrix entry.

get_matrix()

template<typename number , bool Constness>

const SparseMatrix< number > & SparseMatrixIterators::Accessor< number, Constness >::get_matrix

(

)

const

Return a reference to the matrix into which this accessor points. Note that in the present case, this is a constant reference.

row()

size_type SparsityPatternIterators::Accessor::row ( ) const

inherited

Row number of the element represented by this object. This function can only be called for entries for which is_valid_entry() is true.

index()

size_type SparsityPatternIterators::Accessor::index ( ) const

inherited

Index within the current row of the element represented by this object. This function can only be called for entries for which is_valid_entry() is true.

global_index()

size_type SparsityPatternIterators::Accessor::global_index ( ) const

inherited

This function returns the how-many'th entry within the entire sparsity pattern the current iterator points to. While the order of entries in a sparsity pattern is generally not important, this function allows indexing entries of the sparsity pattern using a linear index.

This function can only be called for entries for which is_valid_entry() is true.

column()

size_type SparsityPatternIterators::Accessor::column ( ) const

inherited

Column number of the element represented by this object. This function can only be called for entries for which is_valid_entry() is true.

is_valid_entry()

bool SparsityPatternIterators::Accessor::is_valid_entry ( ) const

inherited

Return whether the sparsity pattern entry pointed to by this iterator is valid or not. Note that after compressing the sparsity pattern, all entries are valid. However, before compression, the sparsity pattern allocated some memory to be used while still adding new nonzero entries; if you create iterators in this phase of the sparsity pattern's lifetime, you will iterate over elements that are not valid. If this is so, then this function will return false.

operator==()

bool SparsityPatternIterators::Accessor::operator== ( const Accessor &  ) const

inherited

Comparison. True, if both iterators point to the same matrix position.

operator<()

bool SparsityPatternIterators::Accessor::operator< ( const Accessor &  ) const

inherited

Comparison operator. Result is true if either the first row number is smaller or if the row numbers are equal and the first index is smaller.

This function is only valid if both iterators point into the same sparsity pattern.

advance()

void SparsityPatternIterators::Accessor::advance ( )

protectedinherited

Move the accessor to the next nonzero entry in the matrix.

Member Data Documentation

container

const SparsityPattern* SparsityPatternIterators::Accessor::container

protectedinherited

The sparsity pattern we operate on accessed.

Definition at line 229 of file sparsity_pattern.h.

linear_index

std::size_t SparsityPatternIterators::Accessor::linear_index

protectedinherited

Index in global sparsity pattern. This index represents the location the iterator/accessor points to within the array of the SparsityPattern class that stores the column numbers. It is also the index within the values array of a sparse matrix that stores the corresponding value of this site.

Definition at line 238 of file sparsity_pattern.h.

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

• include/deal.II/lac/sparse_matrix.h