1 files changed, 37 insertions, 0 deletions
diff --git a/extractor/vocabulary.cc b/extractor/vocabulary.cc
new file mode 100644
index 00000000..15795d1e
--- /dev/null
+++ b/extractor/vocabulary.cc
@@ -0,0 +1,37 @@
+#include "vocabulary.h"
+
+namespace extractor {
+
+Vocabulary::~Vocabulary() {}
+
+int Vocabulary::GetTerminalIndex(const string& word) {
+  int word_id = -1;
+  #pragma omp critical (vocabulary)
+  {
+    if (!dictionary.count(word)) {
+      word_id = words.size();
+      dictionary[word] = word_id;
+      words.push_back(word);
+    } else {
+      word_id = dictionary[word];
+    }
+  }
+  return word_id;
+}
+
+int Vocabulary::GetNonterminalIndex(int position) {
+  return -position;
+}
+
+bool Vocabulary::IsTerminal(int symbol) {
+  return symbol >= 0;
+}
+
+string Vocabulary::GetTerminalValue(int symbol) {
+  string word;
+  #pragma omp critical (vocabulary)
+  word = words[symbol];
+  return word;
+}
+
+} // namespace extractor