gamma_p.hpp

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#ifndef STAN_MATH_PRIM_FUN_GAMMA_P_HPP
#define STAN_MATH_PRIM_FUN_GAMMA_P_HPP
 
#include <stan/math/prim/err.hpp>
#include <stan/math/prim/fun/boost_policy.hpp>
#include <stan/math/prim/fun/constants.hpp>
#include <stan/math/prim/fun/is_nan.hpp>
#include <stan/math/prim/functor/apply_scalar_binary.hpp>
#include <boost/math/special_functions/gamma.hpp>
 
namespace stan {
namespace math {
 
inline double gamma_p(double z, double a) {
  if (is_nan(z)) {
    return not_a_number();
  }
  if (is_nan(a)) {
    return not_a_number();
  }
  check_positive("gamma_p", "first argument (z)", z);
  check_nonnegative("gamma_p", "second argument (a)", a);
  return boost::math::gamma_p(z, a, boost_policy_t<>());
}
 
template <typename T1, typename T2, require_any_container_t<T1, T2>* = nullptr>
inline auto gamma_p(T1&& a, T2&& b) {
  return apply_scalar_binary(
      [](auto&& c, auto&& d) {
        return gamma_p(std::forward<decltype(c)>(c),
                       std::forward<decltype(d)>(d));
      },
      std::forward<T1>(a), std::forward<T2>(b));
}
 
}  // namespace math
}  // namespace stan
#endif