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git-svn-id: https://ws10smt.googlecode.com/svn/trunk@710 ec762483-ff6d-05da-a07a-a48fb63a330f

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diff --git a/klm/lm/enumerate_vocab.hh b/klm/lm/enumerate_vocab.hh
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+++ b/klm/lm/enumerate_vocab.hh
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+#ifndef LM_ENUMERATE_VOCAB__
+#define LM_ENUMERATE_VOCAB__
+
+#include "lm/word_index.hh"
+#include "util/string_piece.hh"
+
+namespace lm {
+namespace ngram {
+
+/* If you need the actual strings in the vocabulary, inherit from this class
+ * and implement Add.  Then put a pointer in Config.enumerate_vocab.  
+ * Add is called once per n-gram.  index starts at 0 and increases by 1 each
+ * time.  
+ */
+class EnumerateVocab {
+  public:
+    virtual ~EnumerateVocab() {}
+
+    virtual void Add(WordIndex index, const StringPiece &str) = 0;
+
+  protected:
+    EnumerateVocab() {}
+};
+
+} // namespace ngram
+} // namespace lm
+
+#endif // LM_ENUMERATE_VOCAB__
+