InvalidAccessor< structdim, dim, spacedim > Class Template Reference

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

Inheritance diagram for InvalidAccessor< structdim, dim, spacedim >:

Public Types
using	AccessorData = typename TriaAccessorBase< structdim, dim, spacedim >::AccessorData
Public Types inherited from TriaAccessorBase< structdim, dim, spacedim >
using	LocalData = void *

Public Member Functions
	InvalidAccessor (const Triangulation< dim, spacedim > *parent=nullptr, const int level=-1, const int index=-1, const AccessorData *local_data=nullptr)
	InvalidAccessor (const InvalidAccessor &)
template<typename OtherAccessor >
	InvalidAccessor (const OtherAccessor &)
void	copy_from (const InvalidAccessor &)
bool	operator== (const InvalidAccessor &) const
void	operator++ () const
bool	used () const
bool	has_children () const
types::manifold_id	manifold_id () const
unsigned int	user_index () const
void	set_user_index (const unsigned int p) const
void	set_manifold_id (const types::manifold_id) const
Point< spacedim > &	vertex (const unsigned int i) const
typename ::internal::TriangulationImplementation::Iterators< dim, spacedim >::line_iterator	line (const unsigned int i) const
typename ::internal::TriangulationImplementation::Iterators< dim, spacedim >::quad_iterator	quad (const unsigned int i) const
Public Member Functions inherited from TriaAccessorBase< structdim, dim, spacedim >
void	operator= (const TriaAccessorBase *)=delete
int	level () const
int	index () const
IteratorState::IteratorStates	state () const
const Triangulation< dim, spacedim > &	get_triangulation () const

Additional Inherited Members
Static Public Attributes inherited from TriaAccessorBase< structdim, dim, spacedim >
static const unsigned int	space_dimension = spacedim
static const unsigned int	dimension = dim
static const unsigned int	structure_dimension = structdim
Protected Types inherited from TriaAccessorBase< structdim, dim, spacedim >
using	AccessorData = void
Protected Member Functions inherited from TriaAccessorBase< structdim, dim, spacedim >
	TriaAccessorBase (const Triangulation< dim, spacedim > *parent=nullptr, const int level=-1, const int index=-1, const AccessorData *=nullptr)
	TriaAccessorBase (const TriaAccessorBase &)
void	copy_from (const TriaAccessorBase &)
TriaAccessorBase &	operator= (const TriaAccessorBase &)
bool	operator< (const TriaAccessorBase &other) const
bool	operator== (const TriaAccessorBase &) const
bool	operator!= (const TriaAccessorBase &) const
::internal::TriangulationImplementation::TriaObjects< ::internal::TriangulationImplementation::TriaObject< structdim > > &	objects () const
void	operator++ ()
void	operator-- ()
Protected Attributes inherited from TriaAccessorBase< structdim, dim, spacedim >
typename ::internal::TriaAccessorImplementation::PresentLevelType< structdim, dim >::type	present_level
int	present_index
const Triangulation< dim, spacedim > *	tria

Detailed Description

template<int structdim, int dim, int spacedim = dim>
class InvalidAccessor< structdim, dim, spacedim >

A class that represents accessor objects to iterators that don't make sense such as quad iterators in on 1d meshes. This class can not be used to create objects (it will in fact throw an exception if this should ever be attempted but it sometimes allows code to be written in a simpler way in a dimension independent way. For example, it allows to write code that works on quad iterators that is dimension independent – i.e., also compiles in 1d – because quad iterators (via the current class) exist and are syntactically correct. You can not expect, however, to ever create an actual object of one of these iterators in 1d, meaning you need to expect to wrap the code block in which you use quad iterators into something like if (dim>1) – which makes eminent sense anyway.

This class provides the minimal interface necessary for Accessor classes to interact with Iterator classes. However, this is only for syntactic correctness, none of the functions do anything but generate errors.

Author

Wolfgang Bangerth, 2008

Definition at line 556 of file tria_accessor.h.

Member Typedef Documentation

AccessorData

template<int structdim, int dim, int spacedim = dim>

using InvalidAccessor< structdim, dim, spacedim >::AccessorData = typename TriaAccessorBase<structdim, dim, spacedim>::AccessorData

Propagate alias from base class to this class.

Definition at line 563 of file tria_accessor.h.

Constructor & Destructor Documentation

InvalidAccessor() [1/3]

template<int structdim, int dim, int spacedim = dim>

InvalidAccessor< structdim, dim, spacedim >::InvalidAccessor	(	const Triangulation< dim, spacedim > *	parent = nullptr,
		const int	level = -1,
		const int	index = -1,
		const AccessorData *	local_data = nullptr
	)

Constructor. This class is used for iterators that do not make sense in a given dimension, for example quads for 1d meshes. Consequently, while the creation of such objects is syntactically valid, they make no semantic sense, and we generate an exception when such an object is actually generated.

InvalidAccessor() [2/3]

template<int structdim, int dim, int spacedim = dim>

InvalidAccessor< structdim, dim, spacedim >::InvalidAccessor

(

const InvalidAccessor< structdim, dim, spacedim > &

)

Copy constructor. This class is used for iterators that do not make sense in a given dimension, for example quads for 1d meshes. Consequently, while the creation of such objects is syntactically valid, they make no semantic sense, and we generate an exception when such an object is actually generated.

InvalidAccessor() [3/3]

template<int structdim, int dim, int spacedim>

template<typename OtherAccessor >

InvalidAccessor< structdim, dim, spacedim >::InvalidAccessor

(

const OtherAccessor &

)

Conversion from other accessors to the current invalid one. This of course also leads to a run-time error.

Definition at line 3595 of file tria_accessor.h.

Member Function Documentation

copy_from()

template<int structdim, int dim, int spacedim = dim>

void InvalidAccessor< structdim, dim, spacedim >::copy_from

(

const InvalidAccessor< structdim, dim, spacedim > &

)

Dummy copy operation.

operator==()

template<int structdim, int dim, int spacedim = dim>

bool InvalidAccessor< structdim, dim, spacedim >::operator==

(

const InvalidAccessor< structdim, dim, spacedim > &

)

const

Dummy comparison operators.

operator++()

template<int structdim, int dim, int spacedim = dim>

void InvalidAccessor< structdim, dim, spacedim >::operator++

(

)

const

Dummy operators to make things compile. Does nothing.

used()

template<int structdim, int dim, int spacedim = dim>

bool InvalidAccessor< structdim, dim, spacedim >::used

(

)

const

Dummy function representing whether the accessor points to a used or an unused object.

has_children()

template<int structdim, int dim, int spacedim = dim>

bool InvalidAccessor< structdim, dim, spacedim >::has_children

(

)

const

Dummy function representing whether the accessor points to an object that has children.

manifold_id()

template<int structdim, int dim, int spacedim = dim>

types::manifold_id InvalidAccessor< structdim, dim, spacedim >::manifold_id

(

)

const

Dummy function that always returns numbers::flat_manifold_id.

user_index()

template<int structdim, int dim, int spacedim = dim>

unsigned int InvalidAccessor< structdim, dim, spacedim >::user_index

(

)

const

Dummy function that always returns numbers::invalid_unsigned_int.

set_user_index()

template<int structdim, int dim, int spacedim = dim>

void InvalidAccessor< structdim, dim, spacedim >::set_user_index

(

const unsigned int

p

)

const

Dummy function that always throws.

set_manifold_id()

template<int structdim, int dim, int spacedim = dim>

void InvalidAccessor< structdim, dim, spacedim >::set_manifold_id

(

const types::manifold_id

)

const

Dummy function that always throws.

vertex()

template<int structdim, int dim, int spacedim = dim>

Point<spacedim>& InvalidAccessor< structdim, dim, spacedim >::vertex

(

const unsigned int

i

)

const

Dummy function to extract vertices. Returns the origin.

line()

template<int structdim, int dim, int spacedim = dim>

typename ::internal::TriangulationImplementation:: Iterators<dim, spacedim>::line_iterator InvalidAccessor< structdim, dim, spacedim >::line

(

const unsigned int

i

)

const

Dummy function to extract lines. Returns a default-constructed line iterator.

quad()

template<int structdim, int dim, int spacedim = dim>

typename ::internal::TriangulationImplementation:: Iterators<dim, spacedim>::quad_iterator InvalidAccessor< structdim, dim, spacedim >::quad

(

const unsigned int

i

)

const

Dummy function to extract quads. Returns a default-constructed quad iterator.

---

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

• deal.II/grid/tria_accessor.h