math/prim_2meta_2is__vari_8hpp_source.html

#ifndef STAN_MATH_PRIM_META_IS_VARI_HPP

#define STAN_MATH_PRIM_META_IS_VARI_HPP


#include <stan/math/prim/meta/require_helpers.hpp>

#include <type_traits>


namespace stan {

template <typename T, typename = void>

struct is_vari : std::false_type {};


template <typename T>

struct value_type<T, require_t<is_vari<T>>> {

  using type = typename std::decay_t<T>::value_type;

};


}  // namespace stan

#endif

stan::require_t
std::enable_if_t< Check::value > require_t
If condition is true, template is enabled.
Definition require_helpers.hpp:19

stan
The lgamma implementation in stan-math is based on either the reentrant safe lgamma_r implementation ...
Definition unit_vector_constrain.hpp:15

require_helpers.hpp

stan::is_vari
Specialization for checking if value of T minus cv qualifier and pointer is a vari.
Definition is_vari.hpp:13

stan::value_type< T, require_t< is_vari< T > > >::type
typename std::decay_t< T >::value_type type
Definition is_vari.hpp:17

stan::value_type
Primary template class for metaprogram to compute the type of values stored in a container.
Definition value_type.hpp:18