FTensor::SymmLTensor< T, Dim > Class Template Reference

Mapping from symmetric tensor indices to packed storage index. More...

#include "src/ftensor/src/FTensor/SymmLTensor.hpp"

Collaboration diagram for FTensor::SymmLTensor< T, Dim >:

Public Types
using	value_type = typename promote< T, double >::V

Public Member Functions
constexpr value_type	operator() (const int N0, const int N1, const int N2) const
template<char i, char j, char k, int Dim01, int Dim2>
std::enable_if<(Dim01==Dim &&Dim2==size_symm), Dg_Expr< SymmLTensor< T, Dim >, value_type, Dim01, Dim2, i, j, k > >::type	operator() (const Index< i, Dim01 > &, const Index< j, Dim01 > &, const Index< k, Dim2 > &) const

Static Public Attributes
static constexpr int	size_symm = (Dim * (Dim + 1)) / 2

Detailed Description

template<class T = int, int Dim = 3>
class FTensor::SymmLTensor< T, Dim >

Mapping from symmetric tensor indices to packed storage index.

Template Parameters

T
Dim

Definition at line 16 of file SymmLTensor.hpp.

Member Typedef Documentation

value_type

template<class T = int, int Dim = 3>

using FTensor::SymmLTensor< T, Dim >::value_type = typename promote<T, double>::V

Definition at line 18 of file SymmLTensor.hpp.

Member Function Documentation

operator()() [1/2]

template<class T = int, int Dim = 3>

template<char i, char j, char k, int Dim01, int Dim2>

std::enable_if<(Dim01==Dim &&Dim2==size_symm), Dg_Expr< SymmLTensor< T, Dim >, value_type, Dim01, Dim2, i, j, k > >::type FTensor::SymmLTensor< T, Dim >::operator() ( const Index< i, Dim01 > &  , const Index< j, Dim01 > &  , const Index< k, Dim2 > &    ) const

inline

Definition at line 33 of file SymmLTensor.hpp.

                                           {
    return Dg_Expr<SymmLTensor<T, Dim>, value_type, Dim01, Dim2, i, j, k>(
        *this);
  };

operator()() [2/2]

template<class T = int, int Dim = 3>

constexpr value_type FTensor::SymmLTensor< T, Dim >::operator() ( const int  N0, const int  N1, const int  N2  ) const

inlineconstexpr

Definition at line 21 of file SymmLTensor.hpp.

                                                      {
    const auto hi = N0 > N1 ? N0 : N1;
    const auto lo = N0 > N1 ? N1 : N0;
    const auto packed = hi + (lo * (2 * Dim - lo - 1)) / 2;
    return N2 == packed ? value_type(1) : value_type(0);
  }

Member Data Documentation

size_symm

template<class T = int, int Dim = 3>

constexpr int FTensor::SymmLTensor< T, Dim >::size_symm = (Dim * (Dim + 1)) / 2

staticconstexpr

Definition at line 19 of file SymmLTensor.hpp.

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

• src/ftensor/src/FTensor/SymmLTensor.hpp