37 template<class W1, class W2> class PairWeight;
38 template <class W1, class W2>
39 istream &operator>>(istream &strm, PairWeight<W1, W2> &w);
41 template<class W1, class W2>
44   friend istream &operator>><W1, W2>(istream&, PairWeight<W1, W2>&);
47                      typename W2::ReverseWeight>
54   PairWeight(W1 w1, W2 w2) : value1_(w1), value2_(w2) {}  in PairWeight()
56   static const PairWeight<W1, W2> &Zero() {  in Zero()
57     static const PairWeight<W1, W2> zero(W1::Zero(), W2::Zero());  in Zero()
61   static const PairWeight<W1, W2> &One() {  in One()
62     static const PairWeight<W1, W2> one(W1::One(), W2::One());  in One()
66   static const PairWeight<W1, W2> &NoWeight() {  in NoWeight()
67     static const PairWeight<W1, W2> no_weight(W1::NoWeight(), W2::NoWeight());  in NoWeight()
81   PairWeight<W1, W2> &operator=(const PairWeight<W1, W2> &w) {
97   PairWeight<W1, W2> Quantize(float delta = kDelta) const {
98     return PairWeight<W1, W2>(value1_.Quantize(delta),
108   const W2& Value2() const { return value2_; }  in Value2()
112   void SetValue2(const W2 &w) { value2_ = w; }  in SetValue2()
116       istream &strm, PairWeight<W1, W2>& w, char separator) {  in ReadNoParen()
136     W2 w2 = W2::Zero();  in ReadNoParen()
139     w = PairWeight<W1, W2>(w1, w2);  in ReadNoParen()
145       istream &strm, PairWeight<W1, W2>& w,  in ReadWithParen()
199     W2 w2 = W2::Zero();  in ReadWithParen()
202     w = PairWeight<W1, W2>(w1, w2);  in ReadWithParen()
208   W2 value2_;
212 template <class W1, class W2>
213 inline bool operator==(const PairWeight<W1, W2> &w,
214                        const PairWeight<W1, W2> &v) {
218 template <class W1, class W2>
219 inline bool operator!=(const PairWeight<W1, W2> &w1,
220                        const PairWeight<W1, W2> &w2) {
225 template <class W1, class W2>
226 inline bool ApproxEqual(const PairWeight<W1, W2> &w1,
227                         const PairWeight<W1, W2> &w2,
233 template <class W1, class W2>
234 inline ostream &operator<<(ostream &strm, const PairWeight<W1, W2> &w) {
255 template <class W1, class W2>
256 inline istream &operator>>(istream &strm, PairWeight<W1, W2> &w) {
270     return PairWeight<W1, W2>::ReadWithParen(
274     return PairWeight<W1, W2>::ReadNoParen(strm, w, separator);