actually use -n feature_name in LanguageModel. FF factory usage facility, FF feature ids facility (not used yet)

git-svn-id: https://ws10smt.googlecode.com/svn/trunk@186 ec762483-ff6d-05da-a07a-a48fb63a330f

1 files changed, 8 insertions, 0 deletions

diff --git a/decoder/ff_factory.h b/decoder/ff_factory.h
index bc586567..75911f38 100644
--- a/decoder/ff_factory.h
+++ b/decoder/ff_factory.h
@@ -17,8 +17,10 @@ class FFRegistry {
   friend class FFFactoryBase;
  public:
   boost::shared_ptr<FeatureFunction> Create(const std::string& ffname, const std::string& param) const;
+  std::string usage(std::string const& ffname,bool params=true,bool verbose=true) const;
   void DisplayList() const;
   void Register(const std::string& ffname, FFFactoryBase* factory);
+  void Register(FFFactoryBase* factory);
  private:
   FFRegistry() {}
   std::map<std::string, boost::shared_ptr<FFFactoryBase> > reg_;
@@ -27,6 +29,7 @@ class FFRegistry {
 struct FFFactoryBase {
   virtual ~FFFactoryBase();
   virtual boost::shared_ptr<FeatureFunction> Create(const std::string& param) const = 0;
+  virtual std::string usage(bool params,bool verbose) const = 0;
 };
 
 template<class FF>
@@ -34,6 +37,11 @@ class FFFactory : public FFFactoryBase {
   boost::shared_ptr<FeatureFunction> Create(const std::string& param) const {
     return boost::shared_ptr<FeatureFunction>(new FF(param));
   }
+  // called with false,false just gives feature name
+  virtual std::string usage(bool params,bool verbose) const {
+    return FF::usage(params,verbose);
+  }
+
 };
 
 #endif