apply_scalar_binary.hpp

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#ifndef STAN_MATH_REV_FUNCTOR_APPLY_SCALAR_BINARY_HPP
#define STAN_MATH_REV_FUNCTOR_APPLY_SCALAR_BINARY_HPP
 
#include <stan/math/prim/fun/as_column_vector_or_scalar.hpp>
#include <stan/math/rev/meta.hpp>
#include <stan/math/prim/err/check_matching_dims.hpp>
#include <stan/math/prim/err/check_matching_sizes.hpp>
#include <stan/math/prim/fun/num_elements.hpp>
#include <vector>
 
namespace stan {
namespace math {
 
template <typename T1, typename T2, typename F,
          require_any_var_matrix_t<T1, T2>* = nullptr,
          require_all_matrix_t<T1, T2>* = nullptr>
inline auto apply_scalar_binary(const T1& x, const T2& y, const F& f) {
  check_matching_dims("Binary function", "x", x, "y", y);
  return f(x, y);
}
 
template <typename T1, typename T2, typename F,
          require_any_var_matrix_t<T1, T2>* = nullptr,
          require_any_std_vector_vt<std::is_integral, T1, T2>* = nullptr>
inline auto apply_scalar_binary(const T1& x, const T2& y, const F& f) {
  check_matching_sizes("Binary function", "x", x, "y", y);
  return f(x, y);
}
 
template <typename T1, typename T2, typename F,
          require_any_std_vector_vt<is_std_vector, T1, T2>* = nullptr,
          require_any_std_vector_st<std::is_integral, T1, T2>* = nullptr,
          require_any_var_matrix_t<T1, T2>* = nullptr>
inline auto apply_scalar_binary(const T1& x, const T2& y, const F& f) {
  return f(x, y);
}
 
template <typename T1, typename T2, typename F,
          require_any_stan_scalar_t<T1, T2>* = nullptr,
          require_any_var_matrix_t<T1, T2>* = nullptr>
inline auto apply_scalar_binary(const T1& x, const T2& y, const F& f) {
  return f(x, y);
}
 
}  // namespace math
}  // namespace stan
#endif