TriaIterator< Accessor > Class Template Reference

#include <deal.II/grid/tria_iterator.h>

Inheritance diagram for TriaIterator< Accessor >:

Public Types
using	iterator_category = typename TriaRawIterator< Accessor >::iterator_category
Public Types inherited from TriaRawIterator< Accessor >
using	AccessorType = Accessor
using	iterator_category = std::bidirectional_iterator_tag

Public Member Functions
	TriaIterator ()
	TriaIterator (const TriaIterator< Accessor > &)
	TriaIterator (const TriaRawIterator< Accessor > &)
	TriaIterator (const Triangulation< Accessor::dimension, Accessor::space_dimension > *parent, const int level, const int index, const typename Accessor::AccessorData *local_data=nullptr)
template<typename OtherAccessor >
	TriaIterator (const OtherAccessor &a)
template<typename OtherAccessor >
	TriaIterator (const TriaIterator< OtherAccessor > &i)
	TriaIterator (const TriaAccessorBase< Accessor::structure_dimension, Accessor::dimension, Accessor::space_dimension > &tria_accessor, const typename Accessor::AccessorData *local_data)
template<typename OtherAccessor >
	TriaIterator (const TriaRawIterator< OtherAccessor > &i)
template<typename OtherAccessor >
	TriaIterator (const TriaActiveIterator< OtherAccessor > &i)
TriaIterator< Accessor > &	operator= (const TriaIterator< Accessor > &)
TriaIterator< Accessor > &	operator= (const TriaRawIterator< Accessor > &)
template<class OtherAccessor >
TriaIterator< Accessor > &	operator= (const TriaIterator< OtherAccessor > &)
template<class OtherAccessor >
TriaIterator< Accessor > &	operator= (const TriaRawIterator< OtherAccessor > &)
Advancement of iterators
TriaIterator< Accessor > &	operator++ ()
TriaIterator< Accessor >	operator++ (int)
TriaIterator< Accessor > &	operator-- ()
TriaIterator< Accessor >	operator-- (int)
Public Member Functions inherited from TriaRawIterator< Accessor >
	TriaRawIterator ()
	TriaRawIterator (const TriaRawIterator &)
	TriaRawIterator (const Accessor &a)
template<typename OtherAccessor >
	TriaRawIterator (const OtherAccessor &a)
	TriaRawIterator (const Triangulation< Accessor::dimension, Accessor::space_dimension > *parent, const int level, const int index, const typename AccessorType::AccessorData *local_data=nullptr)
template<typename OtherAccessor >
	TriaRawIterator (const TriaRawIterator< OtherAccessor > &i)
	TriaRawIterator (const TriaAccessorBase< Accessor::structure_dimension, Accessor::dimension, Accessor::space_dimension > &tria_accessor, const typename Accessor::AccessorData *local_data)
template<typename OtherAccessor >
	TriaRawIterator (const TriaIterator< OtherAccessor > &i)
template<typename OtherAccessor >
	TriaRawIterator (const TriaActiveIterator< OtherAccessor > &i)
TriaRawIterator &	operator= (const TriaRawIterator &)
bool	operator== (const TriaRawIterator &) const
bool	operator!= (const TriaRawIterator &) const
bool	operator< (const TriaRawIterator &) const
bool	operator> (const TriaRawIterator &) const
IteratorState::IteratorStates	state () const
template<class StreamType >
void	print (StreamType &out) const
std::size_t	memory_consumption () const
const Accessor &	operator* () const
Accessor &	operator* ()
const Accessor *	operator-> () const
Accessor *	operator-> ()
const Accessor &	access_any () const
TriaRawIterator &	operator++ ()
TriaRawIterator	operator++ (int)
TriaRawIterator &	operator-- ()
TriaRawIterator	operator-- (int)

Static Public Member Functions
static ::ExceptionBase &	ExcAssignmentOfUnusedObject ()
Static Public Member Functions inherited from TriaRawIterator< Accessor >
static ::ExceptionBase &	ExcDereferenceInvalidCell (Accessor arg1)
static ::ExceptionBase &	ExcDereferenceInvalidObject (Accessor arg1)
static ::ExceptionBase &	ExcAdvanceInvalidObject ()
static ::ExceptionBase &	ExcInvalidComparison ()

Additional Inherited Members
Protected Attributes inherited from TriaRawIterator< Accessor >
Accessor	accessor

Detailed Description

template<typename Accessor>
class TriaIterator< Accessor >

This specialization of TriaRawIterator provides access only to the used lines, quads, cells, etc.

Definition at line 35 of file dof_iterator_selector.h.

Member Typedef Documentation

iterator_category

template<typename Accessor>

using TriaIterator< Accessor >::iterator_category = typename TriaRawIterator<Accessor>::iterator_category

Declare some aliases which are standard for iterators and are used by algorithms to enquire about the specifics of the iterators they work on.

Definition at line 735 of file tria_iterator.h.

Constructor & Destructor Documentation

TriaIterator() [1/9]

template<typename Accessor>

TriaIterator< Accessor >::TriaIterator

(

)

Default constructor. This constructor creates an iterator pointing to an invalid object. The iterator is consequently not usable.

TriaIterator() [2/9]

template<typename Accessor>

TriaIterator< Accessor >::TriaIterator

(

const TriaIterator< Accessor > &

)

Copy constructor.

TriaIterator() [3/9]

template<typename Accessor>

TriaIterator< Accessor >::TriaIterator

(

const TriaRawIterator< Accessor > &

)

Conversion constructor from iterators potentially pointing to non-active objects (i.e., for objects for which we can't tell that the object is used just by looking at its type).

Precondition

The argument passed to this constructor must either be (i) a past-the-end iterator; or (ii) it must point to a used object. All other cases will result in an exception.

TriaIterator() [4/9]

template<typename Accessor>

TriaIterator< Accessor >::TriaIterator	(	const Triangulation< Accessor::dimension, Accessor::space_dimension > *	parent,
		const int	level,
		const int	index,
		const typename Accessor::AccessorData *	local_data = nullptr
	)

Constructor, initialized with the triangulation, the level and index of the object pointed to. The last parameter is of a type declared by the accessor class.

Precondition

The argument passed to this constructor must either be (i) a past-the-end iterator; or (ii) it must point to a used object. All other cases will result in an exception.

TriaIterator() [5/9]

template<typename Accessor >

template<typename OtherAccessor >

TriaIterator< Accessor >::TriaIterator ( const OtherAccessor &  a )

explicit

Construct from an accessor of type OtherAccessor that is convertible to the type Accessor.

Definition at line 1175 of file tria_iterator.h.

TriaIterator() [6/9]

template<typename Accessor >

template<typename OtherAccessor >

TriaIterator< Accessor >::TriaIterator ( const TriaIterator< OtherAccessor > &  i )

inline

This is a conversion operator (constructor) which takes another iterator type and copies the data; this conversion works, if there is a conversion path from the OtherAccessor class to the Accessor class of this object. One such path would be derived class to base class, which for example may be used to get a Triangulation::cell_iterator from a DoFHandler::cell_iterator, since the DoFAccessor class is derived from the TriaAccessorBase class.

Definition at line 1139 of file tria_iterator.h.

TriaIterator() [7/9]

template<typename Accessor>

TriaIterator< Accessor >::TriaIterator	(	const TriaAccessorBase< Accessor::structure_dimension, Accessor::dimension, Accessor::space_dimension > &	tria_accessor,
		const typename Accessor::AccessorData *	local_data
	)

Another conversion operator, where we use the pointers to the Triangulation from a TriaAccessorBase object, while the additional data is used according to the actual type of Accessor.

TriaIterator() [8/9]

template<typename Accessor >

template<typename OtherAccessor >

TriaIterator< Accessor >::TriaIterator ( const TriaRawIterator< OtherAccessor > &  i )

inline

Similar conversion operator to the above one, but does a check whether the iterator points to a used element, which is necessary for raw iterators.

Definition at line 1157 of file tria_iterator.h.

TriaIterator() [9/9]

template<typename Accessor >

template<typename OtherAccessor >

TriaIterator< Accessor >::TriaIterator ( const TriaActiveIterator< OtherAccessor > &  i )

inline

Similar conversion operator to the above one, but for conversion from active iterators.

Definition at line 1148 of file tria_iterator.h.

Member Function Documentation

operator=() [1/4]

template<typename Accessor>

TriaIterator<Accessor>& TriaIterator< Accessor >::operator=

(

const TriaIterator< Accessor > &

)

Assignment operator.

operator=() [2/4]

template<typename Accessor>

TriaIterator<Accessor>& TriaIterator< Accessor >::operator=

(

const TriaRawIterator< Accessor > &

)

Cross assignment operator. This assignment is only valid if the given iterator points to a used element.

operator=() [3/4]

template<typename Accessor>

template<class OtherAccessor >

TriaIterator<Accessor>& TriaIterator< Accessor >::operator=

(

const TriaIterator< OtherAccessor > &

)

Assignment operator. Requires, that Accessor can be copied from OtherAccessor.

operator=() [4/4]

template<typename Accessor>

template<class OtherAccessor >

TriaIterator<Accessor>& TriaIterator< Accessor >::operator=

(

const TriaRawIterator< OtherAccessor > &

)

Cross assignment operator. This assignment is only valid if the given iterator points to a used element. Requires, that Accessor can be copied from OtherAccessor.

operator++() [1/2]

template<typename Accessor>

TriaIterator<Accessor>& TriaIterator< Accessor >::operator++

(

)

Prefix ++ operator: ++i. This operator advances the iterator to the next used element and returns a reference to *this.

operator++() [2/2]

template<typename Accessor>

TriaIterator<Accessor> TriaIterator< Accessor >::operator++

(

int

)

Postfix ++ operator: i++. This operator advances the iterator to the next used element, but returns an iterator to the element previously pointed to. Since this involves a temporary and a copy operation and since an active_iterator is quite a large object for a pointer, use the prefix operator ++i whenever possible, especially in the head of for loops (for (; i!=end; ++i)) since there you normally never need the returned value.

operator--() [1/2]

template<typename Accessor>

TriaIterator<Accessor>& TriaIterator< Accessor >::operator--

(

)

Prefix – operator: –i. This operator advances the iterator to the previous used element and returns a reference to *this.

operator--() [2/2]

template<typename Accessor>

TriaIterator<Accessor> TriaIterator< Accessor >::operator--

(

int

)

Postfix – operator: i–.

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

• deal.II/dofs/dof_iterator_selector.h
• deal.II/grid/tria_iterator.h