is_stan_scalar_or_eigen.hpp

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#ifndef STAN_MATH_PRIM_META_IS_STAN_SCALAR_OR_EIGEN_HPP
#define STAN_MATH_PRIM_META_IS_STAN_SCALAR_OR_EIGEN_HPP
 
#include <stan/math/prim/meta/bool_constant.hpp>
#include <stan/math/prim/meta/is_stan_scalar.hpp>
#include <stan/math/prim/meta/is_eigen.hpp>
#include <stan/math/prim/meta/scalar_type.hpp>
#include <stan/math/prim/meta/conjunction.hpp>
#include <stan/math/prim/meta/require_helpers.hpp>
 
#include <type_traits>
 
namespace stan {
 
template <typename T>
using is_stan_scalar_or_eigen
    = bool_constant<is_stan_scalar<std::decay_t<T>>::value
                    || is_eigen<std::decay_t<T>>::value>;
 
template <typename T>
using require_stan_scalar_or_eigen_t
    = require_t<is_stan_scalar_or_eigen<std::decay_t<T>>>;
}  // namespace stan
#endif