ChunkSparsityPatternIterators::Accessor Class Reference

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

Inheritance diagram for ChunkSparsityPatternIterators::Accessor:

Public Types
using	size_type = types::global_dof_index

Public Member Functions
	Accessor (const ChunkSparsityPattern *matrix, const size_type row)
	Accessor (const ChunkSparsityPattern *matrix)
size_type	row () const
std::size_t	reduced_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 ()

Protected Attributes
const ChunkSparsityPattern *	sparsity_pattern
SparsityPatternIterators::Accessor	reduced_accessor
size_type	chunk_row
size_type	chunk_col

Friends
class	Iterator

Detailed Description

Accessor class for iterators into sparsity patterns. This class is also the base class for both const and non-const accessor classes into sparse matrices.

Note that this class only allows read access to elements, providing their row and column number. It does not allow modifying the sparsity pattern itself.

Author

Martin Kronbichler

Date

2013

Definition at line 63 of file chunk_sparsity_pattern.h.

Member Typedef Documentation

size_type

using ChunkSparsityPatternIterators::Accessor::size_type = types::global_dof_index

Declare the type for container size.

Definition at line 69 of file chunk_sparsity_pattern.h.

Constructor & Destructor Documentation

Accessor() [1/2]

ChunkSparsityPatternIterators::Accessor::Accessor	(	const ChunkSparsityPattern *	matrix,
		const size_type	row
	)

Constructor.

Accessor() [2/2]

ChunkSparsityPatternIterators::Accessor::Accessor

(

const ChunkSparsityPattern *

matrix

)

Constructor. Construct the end accessor for the given sparsity pattern.

Member Function Documentation

row()

size_type ChunkSparsityPatternIterators::Accessor::row

(

)

const

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

reduced_index()

std::size_t ChunkSparsityPatternIterators::Accessor::reduced_index

(

)

const

Return the global index from the reduced sparsity pattern.

column()

size_type ChunkSparsityPatternIterators::Accessor::column

(

)

const

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 ChunkSparsityPatternIterators::Accessor::is_valid_entry

(

)

const

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 ChunkSparsityPatternIterators::Accessor::operator==

(

const Accessor &

)

const

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

operator<()

bool ChunkSparsityPatternIterators::Accessor::operator<

(

const Accessor &

)

const

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 ChunkSparsityPatternIterators::Accessor::advance ( )

protected

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

Friends And Related Function Documentation

Iterator

friend class Iterator

friend

Grant access to iterator class.

Mark all other instances of this template as friends.

Definition at line 161 of file chunk_sparsity_pattern.h.

Member Data Documentation

sparsity_pattern

const ChunkSparsityPattern* ChunkSparsityPatternIterators::Accessor::sparsity_pattern

protected

The sparsity pattern we operate on accessed.

Definition at line 135 of file chunk_sparsity_pattern.h.

reduced_accessor

SparsityPatternIterators::Accessor ChunkSparsityPatternIterators::Accessor::reduced_accessor

protected

The accessor of the (reduced) sparsity pattern.

Definition at line 140 of file chunk_sparsity_pattern.h.

chunk_row

size_type ChunkSparsityPatternIterators::Accessor::chunk_row

protected

Current chunk row number.

Definition at line 145 of file chunk_sparsity_pattern.h.

chunk_col

size_type ChunkSparsityPatternIterators::Accessor::chunk_col

protected

Current chunk col number.

Definition at line 150 of file chunk_sparsity_pattern.h.

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

• deal.II/lac/chunk_sparsity_pattern.h