multiply_log.hpp

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#ifndef STAN__MATH__FUNCTIONS__MULTIPLY_LOG_HPP
#define STAN__MATH__FUNCTIONS__MULTIPLY_LOG_HPP

#include <boost/math/tools/promotion.hpp>

namespace stan {
  namespace math {

    template <typename T_a, typename T_b>
    inline typename boost::math::tools::promote_args<T_a,T_b>::type
    multiply_log(const T_a a, const T_b b) {
      using std::log;
      if (b == 0.0 && a == 0.0)
        return 0.0;
      return a * log(b);
    }

  }
}

#endif