PETScWrappers::MatrixIterators::const_iterator Class Reference

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

Classes
class	Accessor

Public Types
using	size_type = types::global_dof_index

Public Member Functions
	const_iterator (const MatrixBase *matrix, const size_type row, const size_type index)
const_iterator &	operator++ ()
const_iterator	operator++ (int)
const Accessor &	operator* () const
const Accessor *	operator-> () const
bool	operator== (const const_iterator &) const
bool	operator!= (const const_iterator &) const
bool	operator< (const const_iterator &) const

Static Public Member Functions
static ::ExceptionBase &	ExcInvalidIndexWithinRow (int arg1, int arg2)

Private Attributes
Accessor	accessor

Detailed Description

This class acts as an iterator walking over the elements of PETSc matrices. Since PETSc offers a uniform interface for all types of matrices, this iterator can be used to access both sparse and full matrices.

Note that PETSc does not give any guarantees as to the order of elements within each row. Note also that accessing the elements of a full matrix surprisingly only shows the nonzero elements of the matrix, not all elements.

Author

Guido Kanschat, Roy Stogner, Wolfgang Bangerth, 2004

Definition at line 65 of file petsc_matrix_base.h.

Member Typedef Documentation

size_type

using PETScWrappers::MatrixIterators::const_iterator::size_type = types::global_dof_index

Declare type for container size.

Definition at line 180 of file petsc_matrix_base.h.

Constructor & Destructor Documentation

const_iterator()

PETScWrappers::MatrixIterators::const_iterator::const_iterator	(	const MatrixBase *	matrix,
		const size_type	row,
		const size_type	index
	)

Constructor. Create an iterator into the matrix matrix for the given row and the index within it.

Member Function Documentation

operator++() [1/2]

const_iterator& PETScWrappers::MatrixIterators::const_iterator::operator++

(

)

Prefix increment.

operator++() [2/2]

const_iterator PETScWrappers::MatrixIterators::const_iterator::operator++

(

int

)

Postfix increment.

operator*()

const Accessor& PETScWrappers::MatrixIterators::const_iterator::operator*

(

)

const

Dereferencing operator.

operator->()

const Accessor* PETScWrappers::MatrixIterators::const_iterator::operator->

(

)

const

Dereferencing operator.

operator==()

bool PETScWrappers::MatrixIterators::const_iterator::operator==

(

const const_iterator &

)

const

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

operator!=()

bool PETScWrappers::MatrixIterators::const_iterator::operator!=

(

const const_iterator &

)

const

Inverse of ==.

operator<()

bool PETScWrappers::MatrixIterators::const_iterator::operator<

(

const const_iterator &

)

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.

Member Data Documentation

accessor

Accessor PETScWrappers::MatrixIterators::const_iterator::accessor

private

Store an object of the accessor class.

Definition at line 245 of file petsc_matrix_base.h.

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

• deal.II/lac/petsc_matrix_base.h