182 class LogWeight : public FloatWeight {
184   typedef LogWeight ReverseWeight;
186   LogWeight() : FloatWeight() {}  in LogWeight()  function
188   LogWeight(float f) : FloatWeight(f) {}  in LogWeight()  function
190   LogWeight(const LogWeight &w) : FloatWeight(w) {}  in LogWeight()  function
192   static const LogWeight Zero() {   return LogWeight(kPosInfinity); }  in Zero()
194   static const LogWeight One() { return LogWeight(0.0F); }  in One()
206   LogWeight Quantize(float delta = kDelta) const {
207     return LogWeight(floor(Value()/delta + 0.5F) * delta);
210   LogWeight Reverse() const { return *this; }  in Reverse()
219 inline LogWeight Plus(const LogWeight &w1, const LogWeight &w2) {  in Plus()
226     return LogWeight(f2 - LogExp(f1 - f2));  in Plus()
228     return LogWeight(f1 - LogExp(f2 - f1));  in Plus()
231 inline LogWeight Times(const LogWeight &w1, const LogWeight &w2) {  in Times()
238     return LogWeight(f1 + f2);  in Times()
241 inline LogWeight Divide(const LogWeight &w1,
242                              const LogWeight &w2,
250     return LogWeight(f1 - f2);