elt_multiply.hpp

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#ifndef STAN_MATH_PRIM_FUN_ELT_MULTIPLY_HPP
#define STAN_MATH_PRIM_FUN_ELT_MULTIPLY_HPP
 
#include <stan/math/prim/fun/Eigen.hpp>
#include <stan/math/prim/meta.hpp>
#include <stan/math/prim/err.hpp>
#include <stan/math/prim/fun/multiply.hpp>
#include <stan/math/prim/fun/to_ref.hpp>
 
namespace stan {
namespace math {
 
template <typename Mat1, typename Mat2,
          require_all_eigen_t<Mat1, Mat2>* = nullptr,
          require_all_not_st_var<Mat1, Mat2>* = nullptr>
inline auto elt_multiply(Mat1&& m1, Mat2&& m2) {
  decltype(auto) m1_ref = to_ref(std::forward<Mat1>(m1));
  decltype(auto) m2_ref = to_ref(std::forward<Mat2>(m2));
  check_matching_dims("elt_multiply", "m1", m1_ref, "m2", m2_ref);
  return make_holder(
      [](auto&& m1_, auto&& m2_) { return m1_.cwiseProduct(m2_); },
      std::forward<decltype(m1_ref)>(m1_ref),
      std::forward<decltype(m2_ref)>(m2_ref));
}
 
template <typename Scalar1, typename Scalar2,
          require_all_stan_scalar_t<Scalar1, Scalar2>* = nullptr>
inline auto elt_multiply(const Scalar1& a, const Scalar2& b) {
  return a * b;
}
 
template <typename T1, typename T2, require_any_matrix_t<T1, T2>* = nullptr,
          require_any_stan_scalar_t<T1, T2>* = nullptr>
inline auto elt_multiply(T1&& A, T2&& B) {
  return multiply(std::forward<T1>(A), std::forward<T2>(B));
}
 
}  // namespace math
}  // namespace stan
 
#endif