Dune::MatrixImp::DenseMatrixBase< B, A > Class Template Reference

A Vector of blocks with different blocksizes. More...

#include <dune/istl/matrix.hh>

Classes
class	ConstIterator
	ConstIterator class for sequential access. More...
class	Iterator
	Iterator class for sequential access. More...

Public Types
using	field_type = typename Imp::BlockTraits< B >::field_type
	export the type representing the field
typedef A	allocator_type
	export the allocator type
typedef A::size_type	size_type
	The size type for the index access.
typedef BlockVector< B, A >	value_type
	Type of the elements of the outer vector, i.e., dynamic vectors of B. More...
typedef BlockVector< B, A >	block_type
	Same as value_type, here for historical reasons.
using	iterator = Iterator
	Export the iterator type using std naming rules.
using	const_iterator = ConstIterator
	Export the const iterator type using std naming rules.

Public Member Functions
	DenseMatrixBase ()
	DenseMatrixBase (size_type rows, size_type columns)
	DenseMatrixBase (const DenseMatrixBase &a)
	copy constructor, has copy semantics
	~DenseMatrixBase ()
	free dynamic memory
void	resize (size_type rows, size_type columns)
	same effect as constructor with same argument
DenseMatrixBase &	operator= (const DenseMatrixBase &a)
	assignment
DenseMatrixBase &	operator= (const field_type &k)
	assign from scalar
reference	operator[] (size_type i)
	random access to blocks
const_reference	operator[] (size_type i) const
	same for read only access
Iterator	begin ()
	begin Iterator
Iterator	end ()
	end Iterator
Iterator	beforeEnd ()
Iterator	beforeBegin () const
Iterator	find (size_type i)
	random access returning iterator (end if not contained)
ConstIterator	find (size_type i) const
	random access returning iterator (end if not contained)
ConstIterator	begin () const
	begin ConstIterator
ConstIterator	end () const
	end ConstIterator
ConstIterator	beforeEnd () const
ConstIterator	rend () const
	end ConstIterator
size_type	N () const
	number of blocks in the vector (are of variable size here)

Detailed Description

template<class B, class A = std::allocator<B>>
class Dune::MatrixImp::DenseMatrixBase< B, A >

A Vector of blocks with different blocksizes.

This class started as a copy of VariableBlockVector, which used to be used for the internal memory managerment of the 'Matrix' class. However, that mechanism stopped working when I started using the RandomAccessIteratorFacade in VariableBlockVector (308dd85483108f8baaa4051251e2c75e2a9aed32, to make VariableBlockVector pass a number of tightened interface compliance tests), and I couldn't quite figure out how to fix that. However, using VariableBlockVector in Matrix internally was a hack anyway, so I simply took the working version of VariableBlockVector and copied it here under the new name of DenseMatrixBase. This is still hacky, but one step closer to an elegant solution.

Member Typedef Documentation

value_type

template<class B , class A = std::allocator<B>>

typedef BlockVector<B,A> Dune::MatrixImp::DenseMatrixBase< B, A >::value_type

Type of the elements of the outer vector, i.e., dynamic vectors of B.

Note that this is not the type referred to by the iterators and random access operators, which return proxy objects.

Constructor & Destructor Documentation

DenseMatrixBase() [1/2]

template<class B , class A = std::allocator<B>>

Dune::MatrixImp::DenseMatrixBase< B, A >::DenseMatrixBase ( )

inline

constructor without arguments makes empty vector, object cannot be used yet

DenseMatrixBase() [2/2]

template<class B , class A = std::allocator<B>>

Dune::MatrixImp::DenseMatrixBase< B, A >::DenseMatrixBase ( size_type  rows, size_type  columns  )

inline

make vector with given number of blocks each having a constant size, object is fully usable then.

Parameters

_nblocks	Number of blocks
m	Number of elements in each block

Member Function Documentation

beforeBegin()

template<class B , class A = std::allocator<B>>

Iterator Dune::MatrixImp::DenseMatrixBase< B, A >::beforeBegin ( ) const

inline

Returns

an iterator that is positioned before the first entry of the vector.

beforeEnd() [1/2]

template<class B , class A = std::allocator<B>>

Iterator Dune::MatrixImp::DenseMatrixBase< B, A >::beforeEnd ( )

inline

Returns

an iterator that is positioned before the end iterator of the vector, i.e. at the last entry.

beforeEnd() [2/2]

template<class B , class A = std::allocator<B>>

ConstIterator Dune::MatrixImp::DenseMatrixBase< B, A >::beforeEnd ( ) const

inline

Returns

an iterator that is positioned before the end iterator of the vector. i.e. at the last element.

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

• dune/istl/matrix.hh