stan::partials_return_type< T, T_pack > Struct Template Reference

Detailed Description

template<typename T, typename... T_pack>
struct stan::partials_return_type< T, T_pack >

Template metaprogram to calculate the partial derivative type resulting from promoting all the scalar types of the template parameters.

The metaprogram can take an arbitrary number of template parameters.

All C++ primitive types (except long double) are automatically promoted to double.

partials_return_type<...> is a class defining a single public typedef type that is var if there is a forward mode variable type and is double otherwise (this is the most common case). Example usage:

• return_type<int,double,var>::type is double
• The same thing with var replaced with a forward mode type like fvar<T> will return T.

Template Parameters

T	(required) A type
T_pack	(optional) A parameter pack containing further types.

Definition at line 33 of file partials_return_type.hpp.

#include <partials_return_type.hpp>

Public Types
using	type = promote_args_t< double, partials_type_t< scalar_type_t< T > >, typename partials_return_type< T_pack... >::type >

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

• stan/math/prim/meta/partials_return_type.hpp