size_mvt.hpp

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#ifndef STAN_MATH_PRIM_FUN_SIZE_MVT_HPP
#define STAN_MATH_PRIM_FUN_SIZE_MVT_HPP
 
#include <stan/math/prim/meta.hpp>
#include <stan/math/prim/fun/Eigen.hpp>
#include <stdexcept>
#include <vector>
 
namespace stan {
namespace math {
 
template <typename ScalarT, require_stan_scalar_t<ScalarT>* = nullptr>
size_t size_mvt(const ScalarT& /* unused */) {
  throw std::invalid_argument("size_mvt passed to an unrecognized type.");
}
 
template <typename MatrixT, require_matrix_t<MatrixT>* = nullptr>
size_t size_mvt(const MatrixT& /* unused */) {
  return 1U;
}
 
template <typename MatrixT, require_matrix_t<MatrixT>* = nullptr>
size_t size_mvt(const std::vector<MatrixT>& x) {
  return x.size();
}
 
}  // namespace math
}  // namespace stan
#endif