qugar::TensorIndexTP< dim > Class Template Reference

Class representing a dim-dimensional tensor-product indices. More...

#include <tensor_index_tp.hpp>

Inheritance diagram for qugar::TensorIndexTP< dim >:

Collaboration diagram for qugar::TensorIndexTP< dim >:

Public Member Functions
Constructors
template<int aux_dim = dim> requires (aux_dim == dim && dim > 0)
	TensorIndexTP ()
	Default constructor. Initializes indices to zero.
template<int aux_dim = dim> requires (aux_dim == dim && dim == 0)
	TensorIndexTP ()
template<int aux_dim = dim> requires (aux_dim == dim && dim > 0)
	TensorIndexTP (int ind)
	Constructs a new TensorIndexTP object from an index.
	TensorIndexTP (const Vector< int, dim > &indices)
	Constructs a new TensorIndexTP object from its indices.
	TensorIndexTP (const TensorSizeTP< dim > &indices)
	Constructs a new TensorIndexTP object from its indices.
template<int aux_dim = dim> requires (aux_dim == dim && dim > 0)
	TensorIndexTP (std::int64_t flat_index, const TensorIndexTP< dim > &size)
	Constructs a new TensorIndexTP object from a flat index and an associated tensor size following the lexicographical ordering convention (i.e., lower indices run faster than higher ones).
template<int aux_dim = dim> requires (aux_dim == dim && dim > 0)
	TensorIndexTP (std::int64_t flat_index, const TensorSizeTP< dim > &size)
	Constructs a new TensorIndexTP object from a flat index and an associated tensor size following the lexicographical ordering convention (i.e., lower indices run faster than higher ones).
template<typename... T> requires (dim > 1 && sizeof...(T) == dim && std::conjunction_v<std::is_same<int, T>...>)
	TensorIndexTP (T... indices)
	Constructs the tensor index from an argument list.
const Vector< int, dim > &	as_Vector () const
	Returns the tensor index casted as a Vector.
Vector< int, dim > &	as_Vector ()
	Returns the tensor index casted as a Vector.
template<typename S >
std::int64_t	flat (const S &size) const
	Gets the flat index associated to the current tensor index for a given tensor size.
bool	operator== (const TensorIndexTP< dim > &rhs) const
	Checks if two tensor indices are equal by comparing all its components. They are equal if all the components are equal.
bool	operator!= (const TensorIndexTP< dim > &rhs) const
	Checks if two tensor indices are different by comparing all its components. They are different if at least one component is different.
bool	operator< (const TensorIndexTP< dim > &rhs) const
	Checks if the current tensor index is smaller than rhs. To determine if one is smaller than the other, all the componets are compared starting from the last one.
template<int aux_dim = dim> requires (aux_dim == dim && dim > 1)
TensorIndexTP< dim - 1 >	remove_component (int comp) const
	Creates a new index by removing one of its component.
std::size_t	hash () const
	Computes a hash value for the tensor index.

Detailed Description

template<int dim>
class qugar::TensorIndexTP< dim >

Class representing a dim-dimensional tensor-product indices.

Template Parameters

dim	Dimension of the indices.

Constructor & Destructor Documentation

TensorIndexTP() [1/8]

template<int dim>

template<int aux_dim = dim>
requires (aux_dim == dim && dim > 0)

qugar::TensorIndexTP< dim >::TensorIndexTP ( )

inline

Default constructor. Initializes indices to zero.

TensorIndexTP() [2/8]

template<int dim>

template<int aux_dim = dim>
requires (aux_dim == dim && dim == 0)

qugar::TensorIndexTP< dim >::TensorIndexTP ( )

inline

TensorIndexTP() [3/8]

template<int dim>

template<int aux_dim = dim>
requires (aux_dim == dim && dim > 0)

qugar::TensorIndexTP< dim >::TensorIndexTP ( int ind )

inlineexplicit

Constructs a new TensorIndexTP object from an index.

Parameters

ind	All the indices are set to this values.

Note

Not available for 0-dimensional case.

TensorIndexTP() [4/8]

template<int dim>

qugar::TensorIndexTP< dim >::TensorIndexTP ( const Vector< int, dim > & indices )

explicit

Constructs a new TensorIndexTP object from its indices.

Parameters

indices

Indices along the parametric directions.

TensorIndexTP() [5/8]

template<int dim>

qugar::TensorIndexTP< dim >::TensorIndexTP ( const TensorSizeTP< dim > & indices )

explicit

Constructs a new TensorIndexTP object from its indices.

Parameters

indices

Indices along the parametric directions.

TensorIndexTP() [6/8]

template<int dim>

template<int aux_dim = dim>
requires (aux_dim == dim && dim > 0)

qugar::TensorIndexTP< dim >::TensorIndexTP ( std::int64_t flat_index, const TensorIndexTP< dim > & size )

inline

Constructs a new TensorIndexTP object from a flat index and an associated tensor size following the lexicographical ordering convention (i.e., lower indices run faster than higher ones).

Parameters

flat_index	Flat index.
size	Tensor size the flat_index is associated to.

Note

Not available for 0-dimensional case.

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TensorIndexTP() [7/8]

template<int dim>

template<int aux_dim = dim>
requires (aux_dim == dim && dim > 0)

qugar::TensorIndexTP< dim >::TensorIndexTP ( std::int64_t flat_index, const TensorSizeTP< dim > & size )

inline

Constructs a new TensorIndexTP object from a flat index and an associated tensor size following the lexicographical ordering convention (i.e., lower indices run faster than higher ones).

Parameters

flat_index	Flat index.
size	Tensor size the flat_index is associated to.

Note

Not available for 0-dimensional case.

TensorIndexTP() [8/8]

template<int dim>

template<typename... T>
requires (dim > 1 && sizeof...(T) == dim && std::conjunction_v<std::is_same<int, T>...>)

qugar::TensorIndexTP< dim >::TensorIndexTP ( T... indices )

inlineexplicit

Constructs the tensor index from an argument list.

Parameters

indices

Input arguments for the indices.

Member Function Documentation

as_Vector() [1/2]

template<int dim>

Vector< int, dim > & qugar::TensorIndexTP< dim >::as_Vector

(

)

Returns the tensor index casted as a Vector.

Returns

A constant reference to a Vector.

Note

Non-constant version.

as_Vector() [2/2]

template<int dim>

const Vector< int, dim > & qugar::TensorIndexTP< dim >::as_Vector ( ) const

inline

Returns the tensor index casted as a Vector.

Returns

A constant reference to a Vector.

Note

Constant version.

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flat()

template<int dim>

template<typename S >

std::int64_t qugar::TensorIndexTP< dim >::flat ( const S & size ) const

nodiscard

Gets the flat index associated to the current tensor index for a given tensor size.

Parameters

size	Tensor size the current index is associated to.

Returns

Computed flat index.

Template Parameters

S	Size type.

hash()

template<int dim>

std::size_t qugar::TensorIndexTP< dim >::hash ( ) const

nodiscard

Computes a hash value for the tensor index.

This function generates a hash value that uniquely identifies the tensor index. The hash value can be used for efficient lookups and comparisons.

Returns

A std::size_t value representing the hash of the tensor index.

operator!=()

template<int dim>

bool qugar::TensorIndexTP< dim >::operator!= ( const TensorIndexTP< dim > & rhs ) const

nodiscard

Checks if two tensor indices are different by comparing all its components. They are different if at least one component is different.

Returns

Whether they are different or not.

operator<()

template<int dim>

bool qugar::TensorIndexTP< dim >::operator< ( const TensorIndexTP< dim > & rhs ) const

nodiscard

Checks if the current tensor index is smaller than rhs. To determine if one is smaller than the other, all the componets are compared starting from the last one.

Returns

Whether the current tensor is smaller than rhs.

operator==()

template<int dim>

bool qugar::TensorIndexTP< dim >::operator== ( const TensorIndexTP< dim > & rhs ) const

nodiscard

Checks if two tensor indices are equal by comparing all its components. They are equal if all the components are equal.

Returns

Whether they are equal or not.

remove_component()

template<int dim>

template<int aux_dim = dim>
requires (aux_dim == dim && dim > 1)

TensorIndexTP< dim - 1 > qugar::TensorIndexTP< dim >::remove_component

(

int

comp

)

const

Creates a new index by removing one of its component.

Parameters

comp	Index of the component to be removed.

Returns

New generated index.

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

• /__w/qugar/qugar/cpp/include/qugar/tensor_index_tp.hpp