size.hpp

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#ifndef STAN_MATH_PRIM_FUN_SIZE_HPP
#define STAN_MATH_PRIM_FUN_SIZE_HPP
 
#include <stan/math/prim/meta.hpp>
#include <stan/math/prim/fun/Eigen.hpp>
#include <cstdlib>
#include <vector>
 
namespace stan {
namespace math {
 
template <typename T, require_stan_scalar_t<T>* = nullptr>
inline size_t size(const T& /*x*/) {
  return 1U;
}
 
template <typename T, require_container_t<T>* = nullptr>
inline size_t size(const T& m) {
  return m.size();
}
 
template <typename T, require_var_matrix_t<T>* = nullptr>
inline size_t size(const T& m) {
  return m.size();
}
 
}  // namespace math
}  // namespace stan
#endif