Domi::MDIterator< MDARRAY > Class Template Reference

Iterator class suitable for multi-dimensional arrays. More...

#include <Domi_MDIterator.hpp>

Inheritance diagram for Domi::MDIterator< MDARRAY >:

Public Types
MDARRAY typedefs
typedef MDARRAY::value_type	value_type
	Value type.
typedef MDARRAY::pointer	pointer
	Pointer type.

Public Member Functions
dim_type	index (int axis) const
	Return the current index value along the given axis. More...
Constructors and Destructor
	MDIterator (const MDARRAY &mdarray, bool end_index=false)
	MDIterator constructor. More...
	MDIterator (const MDARRAY &mdarray, const Teuchos::ArrayView< dim_type > &index)
	Index constructor. More...
	MDIterator (const MDIterator< MDARRAY > &source)
	Copy constructor. More...
	~MDIterator ()
	Destructor.
Standard Operators
MDIterator< MDARRAY > &	operator= (const MDIterator< MDARRAY > &source)
	Assignment operator. More...
bool	operator== (const MDIterator< MDARRAY > &other) const
	Equality operator. More...
bool	operator!= (const MDIterator< MDARRAY > &other) const
	Inequality operator. More...
value_type &	operator* ()
	Dereferencing operator.
pointer	operator-> () const
	Dereferencing arrow operator.
MDIterator< MDARRAY > &	operator++ ()
	Prefix increment operator.
MDIterator< MDARRAY >	operator++ (int)
	Postfix increment operator.
MDIterator< MDARRAY > &	operator-- ()
	Prefix decrement operator.
MDIterator< MDARRAY >	operator-- (int)
	Postfix decrement operator.

Friends
template<typename T2 >
std::ostream &	operator<< (std::ostream &os, const MDIterator< T2 > &a)
	Stream output operator.

Detailed Description

template<class MDARRAY>
class Domi::MDIterator< MDARRAY >

Iterator class suitable for multi-dimensional arrays.

This iterator is specialized for multi-dimensional arrays. It can be used like a standard iterator, without knowledge of the number of dimensions of the array. It is designed to iterate only over valid elements of the array. It is possible, especially with sliced views into a parent array, for the data buffer to have stride gaps that do not belong to the array. This iterator avoids those stride gaps by keeping an internal record of the multi- dimensional index, and only iterating over valid indexes.

To apply MDIterator to all three multi-dimensional array types (MDArray, MDArrayView and MDArrayRCP), the class is templated on parameter class MDARRAY, which is intended to be any one of the three MDArray types. The MDARRAY class is expected to support the the typedefs size_type, dim_type, and value_type, the numDims() method and the _ptr, _strides, _dimensions, and _layout attributes.

It is intended that the array class that will use the MDIterator will declare the MDIterator to be a friend and to typedef the fully qualified class. For example, within the MDArray< T > class:

friend class MDIterator< MDArray< T > >;
friend class MDIterator< MDArray< const T > >;

typedef MDIterator< MDArray< T > > iterator;
typedef MDIterator< MDArray< const T > > const_iterator;

and declare begin(), end() and cbegin(), cend() methods:

iterator begin() { return iterator(*this      ); }
iterator end()   { return iterator(*this, true); }

const_iterator begin() const { return const_iterator(*this      ); }
const_iterator end()   const { return const_iterator(*this, true); }

const_iterator cbegin() const { return const_iterator(*this      ); }
const_iterator cend()   const { return const_iterator(*this, true); }

Constructor & Destructor Documentation

template<class MDARRAY>

Domi::MDIterator< MDARRAY >::MDIterator	(	const MDARRAY &	mdarray,
		bool	end_index = false
	)

MDIterator constructor.

Parameters

mdarray	[in] The multi-dimensional array object on which the iterator will act upon
end_index	[in] If true, set the internal index to the MDARRAY end() index. If false, set the internal index to the MDARRAY begin() index. Default false.

Produces an iterator with index corresponding to either the MDARRAY begin() or end() methods, depending on the value of the end_index argument.

template<class MDARRAY>

Domi::MDIterator< MDARRAY >::MDIterator	(	const MDARRAY &	mdarray,
		const Teuchos::ArrayView< dim_type > &	index
	)

Index constructor.

Parameters

mdarray	[in] The multi-dimensional array object on which the iterator will act upon
index	[in] A Teuchos::ArrayView that specifies where the internal index of the iterator should start.

Produces an iterator with index corresponding to the given index.

template<class MDARRAY>

Domi::MDIterator< MDARRAY >::MDIterator

(

const MDIterator< MDARRAY > &

source

)

Copy constructor.

Parameters

source

[in] The source MDIterator to be copied

Member Function Documentation

template<class MDARRAY >

dim_type Domi::MDIterator< MDARRAY >::index ( int  axis ) const

inline

Return the current index value along the given axis.

Parameters

axis	[in] Requested axis for index value

template<class MDARRAY>

bool Domi::MDIterator< MDARRAY >::operator!=

(

const MDIterator< MDARRAY > &

other

)

const

Inequality operator.

Parameters

other

[in] Iterator to be compared to

template<class MDARRAY>

MDIterator< MDARRAY > & Domi::MDIterator< MDARRAY >::operator=

(

const MDIterator< MDARRAY > &

source

)

Assignment operator.

Parameters

source

[in] Source iterator for assignment

template<class MDARRAY>

bool Domi::MDIterator< MDARRAY >::operator==

(

const MDIterator< MDARRAY > &

other

)

const

Equality operator.

Parameters

other

[in] Iterator to be compared to

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

• http://docs.trilinos.org/r13.0/packages/domi/src/Domi_MDIterator.hpp