make_callback_vari()

template<typename T , typename F >

internal::callback_vari< plain_type_t< T >, F > * stan::math::make_callback_vari ( T &&  value, F &&  functor  )

inline

Creates a new vari with given value and a callback that implements the reverse pass (chain).

The callback needs to accept a referenct to the vari. If it needs any other data it should be implemented as a lambda capturing the variables it needs.

All captured values must be trivially destructible or they will leak memory! to_arena() function can be used to ensure that.

Template Parameters

T	type of value
F	type of callable

Parameters

value	value of the vari
functor	functor or other callable to call in the reverse pass

Definition at line 41 of file callback_vari.hpp.