Function Float16

cpp/src/arrow/util/float16.h:45–45

 public:
  Float16() = default;
  explicit Float16(float f) : Float16(FromFloat(f)) {}
  explicit Float16(double d) : Float16(FromDouble(d)) {}
  template <typename T,
            typename std::enable_if_t<std::is_convertible_v<T, double>>* = NULLPTR>