Physical index. More...

#include <Index.h>

Public Member Functions
	Index ()

	Index (std::initializer_list< Subindex > i)

	Index (std::vector< Subindex > i)

	Index (const Index &index)

	Index (const Index &head, const Index &tail)

	Index (const std::vector< std::vector< Subindex >> &indexList)

	Index (std::initializer_list< Index > indexList)

	Index (std::vector< Index > indexList)

	Index (const std::string &indexString)

	Index (const std::string &serialization, Serializable::Mode mode)

bool	equals (const Index &index, bool allowWildcard=false) const

Subindex &	at (unsigned int n)

const Subindex &	at (unsigned int n) const

unsigned int	getSize () const

void	reserve (unsigned int size)

void	pushBack (Subindex subindex)

Subindex	popFront ()

Subindex	popBack ()

void	insert (unsigned int n, Subindex subindex)

Subindex	erase (unsigned int n)

Index	getUnitRange ()

Index	getSubIndex (int first, int last) const

std::vector< Index >	split () const

bool	isPatternIndex () const

void	print () const

std::string	toString () const

Subindex &	operator[] (unsigned int subindex)

const Subindex &	operator[] (unsigned int subindex) const

std::string	serialize (Serializable::Mode mode) const

unsigned int	getSizeInBytes () const

Friends
std::ostream &	operator<< (std::ostream &stream, const Index &index)

bool	operator< (const Index &i1, const Index &i2)

bool	operator> (const Index &i1, const Index &i2)

Detailed Description

Physical index.

An Index is a list of Subindices. For example, {x, y, spin}, {x, y, z, orbital, spin}, and {subsystem, x, y, z, orbital, spin}.

Example

#include "TBTK/Index.h"
#include "TBTK/Streams.h"
#include "TBTK/TBTK.h"
using namespace TBTK;
int main(){
    Initialize();
    Index index({1, 2, 3});
    for(unsigned int n = 0; n < index.getSize(); n++)
        Streams::out << index[n] << "\n";
}

Output

1
2
3

Constructor & Destructor Documentation

◆ Index() [1/10]

TBTK::Index::Index ( )

inline

Constructs an empty Index.

◆ Index() [2/10]

TBTK::Index::Index ( std::initializer_list< Subindex > i )

inline

Constructs an Index from an initializer list.

Parameters

i	Initializer list from which the Index is constructed.

◆ Index() [3/10]

TBTK::Index::Index ( std::vector< Subindex > i )

inline

Constructs an Index from an initializer list.

Parameters

i	Initializer list from which the Index is constructed. Constructs an Index from an std::vector<int>.
i	Vector from which the Index is constructed.

◆ Index() [4/10]

TBTK::Index::Index ( const Index & index )

inline

Constructs an Index from an std::vector<int>.

Parameters

i	Vector from which the Index is constructed. Copy constructor.
index	Index to copy.

◆ Index() [5/10]

TBTK::Index::Index	(	const Index &	head,
		const Index &	tail
	)

Constructs a new Index by concatenating two indices into one total index of the form {head, tail}.

Parameters

head	First part of the compund Index.
tail	Second part of the compund Index.

◆ Index() [6/10]

TBTK::Index::Index ( const std::vector< std::vector< Subindex >> & indexList )

Constructs a compound Index by concatenating a list of indices, adding IDX_SEPARATOR between every index.

Parameters

indexList	List of indices. Constructs a compund Index by concatenating a list of indices, adding IDX_SEPARATOR between every index.
indexList	List of indices.

◆ Index() [7/10]

TBTK::Index::Index ( std::initializer_list< Index > indexList )

Constructs a compound Index by Concatenating a list of indices, adding IDX_SEPARATOR between every index.

Parameters

indexList List of indices.

◆ Index() [8/10]

TBTK::Index::Index ( std::vector< Index > indexList )

Constructs a compound Index by Concatenating a list of indices, adding IDX_SEPARATOR between every index.

Parameters

indexList List of indices.

◆ Index() [9/10]

TBTK::Index::Index ( const std::string & indexString )

Constructs an Index from a string.

Parameters

indexString String such as "{1, 2, 3} from which the Index is constructed.

◆ Index() [10/10]

TBTK::Index::Index	(	const std::string &	serialization,
		Serializable::Mode	mode
	)

Constructs an Index from a serialization string.

Parameters

serialization	Serialization string from which to construct the Index.
mode	Mode with which the string has been serialized.

Member Function Documentation

◆ at() [1/2]

Subindex & TBTK::Index::at ( unsigned int n )

inline

Get subindex n.

Parameters

n Subindex.

Returns: Subindex at position n.

◆ at() [2/2]

const Subindex & TBTK::Index::at ( unsigned int n ) const

inline

Get subindex n. Constant version.

Parameters

n Subindex.

Returns: Subindex at position n.

◆ equals()

bool TBTK::Index::equals	(	const Index &	index,
		bool	allowWildcard = `false`
	)		const

inline

Compare this index with another index. Returns true if the indices have the same number of subindices and all subindices are equal.

Parameters

index	Index to compare with.
allowWildcard	IDX_ALL is interpreted as wildcard.

Returns: True if the indices are equal, otherwise false.

◆ erase()

Subindex TBTK::Index::erase ( unsigned int n )

inline

Remove and return the Subindex at a given position.

Parameters

n	Subindex position to remove.

Returns: The value of the removed Subindex.

◆ getSize()

unsigned int TBTK::Index::getSize ( ) const

inline

Get size.

Returns: Number of subindices for individual indices such as {1, 2, 3}. For compound indices such as {{1, 2}, {3,4}, {5, 6}}, the total number of subindices (here 6) plus the number of index separators (here 2) are returned (here 6+2=8).

◆ getSizeInBytes()

unsigned int TBTK::Index::getSizeInBytes ( ) const

inline

Get size in bytes.

Returns: Memory size required to store the Index.

◆ getSubIndex()

Index TBTK::Index::getSubIndex	(	int	first,
		int	last
	)		const

Returns an Index containing the subindices from position 'first' to 'last'.

first First index to include in range (inclusive). last Last index to include in range (inclusive).

Returns: An index containing the subindices in the range first to last (inclusive).

◆ getUnitRange()

Index TBTK::Index::getUnitRange ( )

Returns an index with the same number or subindices, and each subindex set to 1.

Returns: Index with all subindices set to 1.

◆ insert()

void TBTK::Index::insert	(	unsigned int	n,
		Subindex	subindex
	)

inline

Insert a Subindex at a given position.

Parameters

n	Subindex position to insert at.
subindex	Subindex to insert.

◆ isPatternIndex()

bool TBTK::Index::isPatternIndex ( ) const

inline

Returns true if the Index is a pattern index. That is, if it contains a negative subindex.

Returns: True if the Index is a pattern index, otherwise false.

◆ operator[]() [1/2]

Subindex & TBTK::Index::operator[] ( unsigned int subindex )

inline

Subscript operator.

Parameters

n Subindex.

Returns: Subindex at position n.

◆ operator[]() [2/2]

const Subindex & TBTK::Index::operator[] ( unsigned int subindex ) const

inline

Subscript operator.

Parameters

n Subindex.

Returns: Subindex at position n.

◆ popBack()

Subindex TBTK::Index::popBack ( )

inline

Removes and returns the last subindex.

Returns: The last subindex.

◆ popFront()

Subindex TBTK::Index::popFront ( )

inline

Removes and returns the first subindex.

Returns: The first subindex.

◆ print()

void TBTK::Index::print ( ) const

inline

Print index. Mainly for debuging.

◆ pushBack()

void TBTK::Index::pushBack ( Subindex subindex )

inline

Push subindex at the back of the index.

Parameters

subindex Subindex to append to the Index.

◆ reserve()

void TBTK::Index::reserve ( unsigned int size )

inline

Reserves memory for the Index.

Parameters

Number of subindices to reserve space for.

◆ serialize()

std::string TBTK::Index::serialize ( Serializable::Mode mode ) const

Serialize Index. Note that Index is pseudo-Serializable in that it implements the Serializable interface, but does so non-virtually.

Parameters

mode	Serialization mode to use.

Returns: Serialized string represenation of the Index.

◆ split()

std::vector< Index > TBTK::Index::split ( ) const

inline

Split a compound Index into its components.

Returns: An std::vector<Index> containing the individual Indices .

◆ toString()

std::string TBTK::Index::toString ( ) const

inline

Get string representation of the Index.

Returns: A string representation of the Index.

Friends And Related Function Documentation

◆ operator<

bool operator<	(	const Index &	i1,
		const Index &	i2
	)

friend

Comparison operator. Returns false if the TreeNode structure would generate a smaller Hilbert space index for i1 than for i2.

Returns: True if i1 would generate a smaller Hilbert space index than i2.

◆ operator<<

std::ostream& operator<<	(	std::ostream &	stream,
		const Index &	index
	)

friend

Writes the Index toString()-representation to a stream.

Parameters

stream	The stream to write to.
index	The Index to write.

Returns: Reference to the output stream just written to.

◆ operator>

bool operator>	(	const Index &	i1,
		const Index &	i2
	)

friend

Comparison operator. Returns false if the TreeNode structure would generate a larger Hilbert space index for i1 than for i2.

Returns: True if i1 would generate a larger Hilbert space index than i2.

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

/home/kristofer.bjornson/SecondQuantizationCom/TBTK/Lib/include/Core/TBTK/Index.h

Public Member Functions

Friends

Detailed Description

Example

Output

Constructor & Destructor Documentation

◆ Index() [1/10]

◆ Index() [2/10]

◆ Index() [3/10]

◆ Index() [4/10]

◆ Index() [5/10]

◆ Index() [6/10]

◆ Index() [7/10]

◆ Index() [8/10]

◆ Index() [9/10]

◆ Index() [10/10]

Member Function Documentation

◆ at() [1/2]

◆ at() [2/2]

◆ equals()

◆ erase()

◆ getSize()

◆ getSizeInBytes()

◆ getSubIndex()

◆ getUnitRange()

◆ insert()

◆ isPatternIndex()

◆ operator[]() [1/2]

◆ operator[]() [2/2]

◆ popBack()

◆ popFront()

◆ print()

◆ pushBack()

◆ reserve()

◆ serialize()

◆ split()

◆ toString()

Friends And Related Function Documentation

◆ operator<

◆ operator<<

◆ operator>