1 files changed, 0 insertions, 71 deletions
diff --git a/decoder/exp_semiring.h b/decoder/exp_semiring.h
deleted file mode 100644
index 2a9034bb..00000000
--- a/decoder/exp_semiring.h
+++ /dev/null
@@ -1,71 +0,0 @@
-#ifndef _EXP_SEMIRING_H_
-#define _EXP_SEMIRING_H_
-
-#include <iostream>
-
-// this file implements the first-order expectation semiring described
-// in Li & Eisner (EMNLP 2009)
-
-// requirements:
-//   RType * RType ==> RType
-//   PType * PType ==> PType
-//   RType * PType ==> RType
-// good examples:
-//   PType scalar, RType vector
-// BAD examples:
-//   PType vector, RType scalar
-template <class PType, class RType>
-struct PRPair {
-  PRPair() : p(), r() {}
-  // Inside algorithm requires that T(0) and T(1)
-  // return the 0 and 1 values of the semiring
-  explicit PRPair(double x) : p(x), r() {}
-  PRPair(const PType& p, const RType& r) : p(p), r(r) {}
-  PRPair& operator+=(const PRPair& o) {
-    p += o.p;
-    r += o.r;
-    return *this;
-  }
-  PRPair& operator*=(const PRPair& o) {
-    r = (o.r * p) + (o.p * r);
-    p *= o.p;
-    return *this;
-  }
-  PType p;
-  RType r;
-};
-
-template <class P, class R>
-std::ostream& operator<<(std::ostream& o, const PRPair<P,R>& x) {
-  return o << '<' << x.p << ", " << x.r << '>';
-}
-
-template <class P, class R>
-const PRPair<P,R> operator+(const PRPair<P,R>& a, const PRPair<P,R>& b) {
-  PRPair<P,R> result = a;
-  result += b;
-  return result;
-}
-
-template <class P, class R>
-const PRPair<P,R> operator*(const PRPair<P,R>& a, const PRPair<P,R>& b) {
-  PRPair<P,R> result = a;
-  result *= b;
-  return result;
-}
-
-template <class P, class PWeightFunction, class R, class RWeightFunction>
-struct PRWeightFunction {
-  explicit PRWeightFunction(const PWeightFunction& pwf = PWeightFunction(),
-                            const RWeightFunction& rwf = RWeightFunction()) :
-    pweight(pwf), rweight(rwf) {}
-  PRPair<P,R> operator()(const HG::Edge& e) const {
-    const P p = pweight(e);
-    const R r = rweight(e);
-    return PRPair<P,R>(p, r * p);
-  }
-  const PWeightFunction pweight;
-  const RWeightFunction rweight;
-};
-
-#endif