FTensor::DiffSymmetrize< T > Class Template Reference

Fourth-order symmetrization tensor. More...

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

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 int N3) const
template<char i, char j, char k, char l, int Dim0, int Dim1, int Dim2, int Dim3>
Tensor4_Expr< DiffSymmetrize< T >, value_type, Dim0, Dim1, Dim2, Dim3, i, j, k, l >	operator() (const Index< i, Dim0 > &, const Index< j, Dim1 > &, const Index< k, Dim2 > &, const Index< l, Dim3 > &) const

Detailed Description

template<class T = int>
class FTensor::DiffSymmetrize< T >

Fourth-order symmetrization tensor.

Template Parameters

T

Definition at line 15 of file DiffSymmetrize.hpp.

Member Typedef Documentation

value_type

template<class T = int>

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

Definition at line 17 of file DiffSymmetrize.hpp.

Member Function Documentation

operator()() [1/2]

template<class T = int>

template<char i, char j, char k, char l, int Dim0, int Dim1, int Dim2, int Dim3>

Tensor4_Expr< DiffSymmetrize< T >, value_type, Dim0, Dim1, Dim2, Dim3, i, j, k, l > FTensor::DiffSymmetrize< T >::operator() ( const Index< i, Dim0 > &  , const Index< j, Dim1 > &  , const Index< k, Dim2 > &  , const Index< l, Dim3 > &    ) const

inline

Definition at line 32 of file DiffSymmetrize.hpp.

                                                                   {
    return Tensor4_Expr<DiffSymmetrize<T>, value_type, Dim0, Dim1, Dim2, Dim3,
                        i, j, k, l>(*this);
  };

operator()() [2/2]

template<class T = int>

constexpr value_type FTensor::DiffSymmetrize< T >::operator() ( const int  N0, const int  N1, const int  N2, const int  N3  ) const

inlineconstexpr

Definition at line 19 of file DiffSymmetrize.hpp.

                                                      {
    const auto first =
        (N0 == N2 && N1 == N3) ? value_type(1) : value_type(0);
    const auto second =
        (N0 == N3 && N1 == N2) ? value_type(1) : value_type(0);
    return (first + second) / value_type(2);
  }

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

• src/ftensor/src/FTensor/DiffSymmetrize.hpp