/usr/include/fst/product-weight.h is in libfst-dev 1.6.3-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 | // See www.openfst.org for extensive documentation on this weighted
// finite-state transducer library.
//
// Product weight set and associated semiring operation definitions.
#ifndef FST_LIB_PRODUCT_WEIGHT_H_
#define FST_LIB_PRODUCT_WEIGHT_H_
#include <string>
#include <utility>
#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 ReverseWeight =
ProductWeight<typename W1::ReverseWeight, typename W2::ReverseWeight>;
ProductWeight() {}
explicit ProductWeight(const PairWeight<W1, W2> &weight)
: PairWeight<W1, W2>(weight) {}
ProductWeight(W1 w1, W2 w2)
: PairWeight<W1, W2>(std::move(w1), std::move(w2)) {}
static const ProductWeight &Zero() {
static const ProductWeight zero(PairWeight<W1, W2>::Zero());
return zero;
}
static const ProductWeight &One() {
static const ProductWeight one(PairWeight<W1, W2>::One());
return one;
}
static const ProductWeight &NoWeight() {
static const ProductWeight no_weight(PairWeight<W1, W2>::NoWeight());
return no_weight;
}
static const string &Type() {
static const string *const type =
new string(W1::Type() + "_X_" + W2::Type());
return *type;
}
static constexpr uint64 Properties() {
return W1::Properties() & W2::Properties() &
(kLeftSemiring | kRightSemiring | kCommutative | kIdempotent);
}
ProductWeight Quantize(float delta = kDelta) const {
return ProductWeight(PairWeight<W1, W2>::Quantize(delta));
}
ReverseWeight Reverse() const {
return ReverseWeight(PairWeight<W1, W2>::Reverse());
}
};
template <class W1, class W2>
inline ProductWeight<W1, W2> Plus(const ProductWeight<W1, W2> &w1,
const ProductWeight<W1, W2> &w2) {
return ProductWeight<W1, W2>(Plus(w1.Value1(), w2.Value1()),
Plus(w1.Value2(), w2.Value2()));
}
template <class W1, class W2>
inline ProductWeight<W1, W2> Times(const ProductWeight<W1, W2> &w1,
const ProductWeight<W1, W2> &w2) {
return ProductWeight<W1, W2>(Times(w1.Value1(), w2.Value1()),
Times(w1.Value2(), w2.Value2()));
}
template <class W1, class W2>
inline ProductWeight<W1, W2> Divide(const ProductWeight<W1, W2> &w1,
const ProductWeight<W1, W2> &w2,
DivideType typ = DIVIDE_ANY) {
return ProductWeight<W1, W2>(Divide(w1.Value1(), w2.Value1(), typ),
Divide(w1.Value2(), w2.Value2(), typ));
}
// This function object generates weights by calling the underlying generators
// for the template weight types, like all other pair weight types. This is
// intended primarily for testing.
template <class W1, class W2>
class WeightGenerate<ProductWeight<W1, W2>> :
public WeightGenerate<PairWeight<W1, W2>> {
public:
using Weight = ProductWeight<W1, W2>;
using Generate = WeightGenerate<PairWeight<W1, W2>>;
explicit WeightGenerate(bool allow_zero = true) : Generate(allow_zero) {}
Weight operator()() const { return Weight(Generate::operator()()); }
};
} // namespace fst
#endif // FST_LIB_PRODUCT_WEIGHT_H_
|