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diff --git a/kaldi_io/src/tools/openfst/include/fst/product-weight.h b/kaldi_io/src/tools/openfst/include/fst/product-weight.h
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--- a/kaldi_io/src/tools/openfst/include/fst/product-weight.h
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-// product-weight.h
-
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// Copyright 2005-2010 Google, Inc.
-// Author: riley@google.com (Michael Riley)
-//
-// \file
-// Product weight set and associated semiring operation definitions.
-
-#ifndef FST_LIB_PRODUCT_WEIGHT_H__
-#define FST_LIB_PRODUCT_WEIGHT_H__
-
-#include <stack>
-#include <string>
-
-#include <fst/pair-weight.h>
-#include <fst/weight.h>
-
-
-namespace fst {
-
-// Product semiring: W1 * W2
-template<class W1, class W2>
-class ProductWeight : public PairWeight<W1, W2> {
- public:
- using PairWeight<W1, W2>::Zero;
- using PairWeight<W1, W2>::One;
- using PairWeight<W1, W2>::NoWeight;
- using PairWeight<W1, W2>::Quantize;
- using PairWeight<W1, W2>::Reverse;
-
- typedef ProductWeight<typename W1::ReverseWeight, typename W2::ReverseWeight>
- ReverseWeight;
-
- ProductWeight() {}
-
- ProductWeight(const PairWeight<W1, W2>& w) : PairWeight<W1, W2>(w) {}
-
- ProductWeight(W1 w1, W2 w2) : PairWeight<W1, W2>(w1, w2) {}
-
- static const ProductWeight<W1, W2> &Zero() {
- static const ProductWeight<W1, W2> zero(PairWeight<W1, W2>::Zero());
- return zero;
- }
-
- static const ProductWeight<W1, W2> &One() {
- static const ProductWeight<W1, W2> one(PairWeight<W1, W2>::One());
- return one;
- }
-
- static const ProductWeight<W1, W2> &NoWeight() {
- static const ProductWeight<W1, W2> no_weight(
- PairWeight<W1, W2>::NoWeight());
- return no_weight;
- }
-
- static const string &Type() {
- static const string type = W1::Type() + "_X_" + W2::Type();
- return type;
- }
-
- static uint64 Properties() {
- uint64 props1 = W1::Properties();
- uint64 props2 = W2::Properties();
- return props1 & props2 & (kLeftSemiring | kRightSemiring |
- kCommutative | kIdempotent);
- }
-
- ProductWeight<W1, W2> Quantize(float delta = kDelta) const {
- return PairWeight<W1, W2>::Quantize(delta);
- }
-
- ReverseWeight Reverse() const {
- return PairWeight<W1, W2>::Reverse();
- }
-
-
-};
-
-template <class W1, class W2>
-inline ProductWeight<W1, W2> Plus(const ProductWeight<W1, W2> &w,
- const ProductWeight<W1, W2> &v) {
- return ProductWeight<W1, W2>(Plus(w.Value1(), v.Value1()),
- Plus(w.Value2(), v.Value2()));
-}
-
-template <class W1, class W2>
-inline ProductWeight<W1, W2> Times(const ProductWeight<W1, W2> &w,
- const ProductWeight<W1, W2> &v) {
- return ProductWeight<W1, W2>(Times(w.Value1(), v.Value1()),
- Times(w.Value2(), v.Value2()));
-}
-
-template <class W1, class W2>
-inline ProductWeight<W1, W2> Divide(const ProductWeight<W1, W2> &w,
- const ProductWeight<W1, W2> &v,
- DivideType typ = DIVIDE_ANY) {
- return ProductWeight<W1, W2>(Divide(w.Value1(), v.Value1(), typ),
- Divide(w.Value2(), v.Value2(), typ));
-}
-
-} // namespace fst
-
-#endif // FST_LIB_PRODUCT_WEIGHT_H__