1 #ifndef STAN_MATH_PRIM_MAT_FUN_AS_SCALAR_HPP 2 #define STAN_MATH_PRIM_MAT_FUN_AS_SCALAR_HPP 20 template <
typename Derived>
21 inline double as_scalar(
const Eigen::DenseBase<Derived>& a) {
22 throw std::runtime_error(
"A matrix can not be used as a scalar!");
double as_scalar(const std::vector< T > &a)
Converts input to a scalar.