Differentiation::AD::internal::ExtractData< ADNumberType, T > Struct Template Reference

#include <deal.II/differentiation/ad/ad_number_traits.h>

Detailed Description

template<typename ADNumberType, typename T = void>
struct Differentiation::AD::internal::ExtractData< ADNumberType, T >

A struct to help extract certain information associated with auto-differentiable numbers.

The specializations of this class have to implement the following member data and type definitions:

// Extract the real scalar value.
static scalar_type
value (const ADNumberType &x);

// Extract the number of directional derivatives.
static unsigned int
n_directional_derivatives (const ADNumberType &x);

// Extract the directional derivative in the specified @p direction.
static derivative_type
directional_derivative (const ADNumberType &x,
                        const unsigned int  direction);

where ADNumberType is the auto-differentiable number type.

Template Parameters

ADNumberType	A type corresponding to a supported auto-differentiable number.
T	An arbitrary type resulting from the application of the SFINAE idiom to selectively specialize this class.

Author

Jean-Paul Pelteret, 2017

Definition at line 180 of file ad_number_traits.h.

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

• deal.II/differentiation/ad/ad_number_traits.h