1 files changed, 31 insertions, 0 deletions
diff --git a/decoder/fdict.h b/decoder/fdict.h
new file mode 100644
index 00000000..c4236580
--- /dev/null
+++ b/decoder/fdict.h
@@ -0,0 +1,31 @@
+#ifndef _FDICT_H_
+#define _FDICT_H_
+
+#include <string>
+#include <vector>
+#include "dict.h"
+
+struct FD {
+  // once the FD is frozen, new features not already in the
+  // dictionary will return 0
+  static void Freeze() {
+    frozen_ = true;
+  }
+  static inline int NumFeats() {
+    return dict_.max() + 1;
+  }
+  static inline WordID Convert(const std::string& s) {
+    return dict_.Convert(s, frozen_);
+  }
+  static inline const std::string& Convert(const WordID& w) {
+    return dict_.Convert(w);
+  }
+  // Escape any string to a form that can be used as the name
+  // of a weight in a weights file
+  static std::string Escape(const std::string& s);
+  static Dict dict_;
+ private:
+  static bool frozen_;
+};
+
+#endif