From 27db9d8c05188f64c17d61c394d3dafe8b8e93d8 Mon Sep 17 00:00:00 2001
From: Chris Dyer <redpony@gmail.com>
Date: Sat, 19 Dec 2009 14:32:28 -0500
Subject: cool new alignment feature

---
 decoder/ff_wordalign.h | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'decoder/ff_wordalign.h')

diff --git a/decoder/ff_wordalign.h b/decoder/ff_wordalign.h
index 4a8b59c7..554dd23e 100644
--- a/decoder/ff_wordalign.h
+++ b/decoder/ff_wordalign.h
@@ -38,6 +38,26 @@ class MarkovJump : public FeatureFunction {
   std::string template_;
 };
 
+typedef std::map<WordID, int> Class2FID;
+typedef std::map<WordID, Class2FID> Class2Class2FID;
+class SourcePOSBigram : public FeatureFunction {
+ public:
+  SourcePOSBigram(const std::string& param);
+ protected:
+  virtual void TraversalFeaturesImpl(const SentenceMetadata& smeta,
+                                     const Hypergraph::Edge& edge,
+                                     const std::vector<const void*>& ant_contexts,
+                                     SparseVector<double>* features,
+                                     SparseVector<double>* estimated_features,
+                                     void* context) const;
+ private:
+  void FireFeature(WordID src,
+                   WordID trg,
+                   SparseVector<double>* features) const;
+  mutable Class2Class2FID fmap_;
+  std::vector<std::vector<WordID> > pos_;
+};
+
 class AlignerResults : public FeatureFunction {
  public:
   AlignerResults(const std::string& param);
-- 
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