From 9d2a9d727380649310fd1d26b1918e88b8e284d6 Mon Sep 17 00:00:00 2001
From: armatthews <armatthe@cmu.edu>
Date: Thu, 9 Apr 2015 00:44:09 -0400
Subject: added WER as a possible tuning metric

---
 mteval/CMakeLists.txt | 1 +
 mteval/scorer.cc      | 8 +++++++-
 mteval/scorer.h       | 2 +-
 3 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/mteval/CMakeLists.txt b/mteval/CMakeLists.txt
index 8217c116..7398f01c 100644
--- a/mteval/CMakeLists.txt
+++ b/mteval/CMakeLists.txt
@@ -52,6 +52,7 @@ set(mteval_STAT_SRCS
     comb_scorer.cc
     external_scorer.cc
     meteor_jar.cc
+    wer.cc
     ns.cc
     ns_cer.cc
     ns_comb.cc
diff --git a/mteval/scorer.cc b/mteval/scorer.cc
index fedbca91..4c05dbd8 100644
--- a/mteval/scorer.cc
+++ b/mteval/scorer.cc
@@ -14,6 +14,7 @@
 #include "filelib.h"
 #include "ter.h"
 #include "aer_scorer.h"
+#include "wer.h"
 #include "comb_scorer.h"
 #include "tdict.h"
 #include "stringlib.h"
@@ -46,12 +47,14 @@ ScoreType ScoreTypeFromString(const string& st) {
     return BLEU_minus_TER_over_2;
   if (sl == "meteor")
     return METEOR;
+  if (sl == "wer")
+    return WER;
   cerr << "Don't understand score type '" << st << "', defaulting to ibm_bleu.\n";
   return IBM_BLEU;
 }
 
 static char const* score_names[]={
-  "IBM_BLEU", "NIST_BLEU", "Koehn_BLEU", "TER", "BLEU_minus_TER_over_2", "SER", "AER", "IBM_BLEU_3", "METEOR"
+  "IBM_BLEU", "NIST_BLEU", "Koehn_BLEU", "TER", "BLEU_minus_TER_over_2", "SER", "AER", "IBM_BLEU_3", "METEOR", "WER"
 };
 
 std::string StringFromScoreType(ScoreType st) {
@@ -360,6 +363,7 @@ ScorerP SentenceScorer::CreateSentenceScorer(const ScoreType type,
     case SER: r = new SERScorer(refs);break;
     case BLEU_minus_TER_over_2: r = new BLEUTERCombinationScorer(refs);break;
     case METEOR: r = new ExternalSentenceScorer(ScoreServerManager::Instance("meteor"), refs); break;
+    case WER: r = new WERScorer(refs);break;
     default:
       assert(!"Not implemented!");
   }
@@ -404,6 +408,8 @@ ScoreP SentenceScorer::CreateScoreFromString(const ScoreType type, const string&
       return BLEUTERCombinationScorer::ScoreFromString(in);
     case METEOR:
       return ExternalSentenceScorer::ScoreFromString(ScoreServerManager::Instance("meteor"), in);
+    case WER:
+      return WERScorer::ScoreFromString(in);
     default:
       assert(!"Not implemented!");
   }
diff --git a/mteval/scorer.h b/mteval/scorer.h
index 8d986612..a411f14b 100644
--- a/mteval/scorer.h
+++ b/mteval/scorer.h
@@ -17,7 +17,7 @@ class ErrorSurface;
 class Hypergraph;  // needed for alignment
 
 //TODO: BLEU N (N separate arg, not part of enum)?
-enum ScoreType { IBM_BLEU, NIST_BLEU, Koehn_BLEU, TER, BLEU_minus_TER_over_2, SER, AER, IBM_BLEU_3, METEOR };
+enum ScoreType { IBM_BLEU, NIST_BLEU, Koehn_BLEU, TER, BLEU_minus_TER_over_2, SER, AER, IBM_BLEU_3, METEOR, WER };
 ScoreType ScoreTypeFromString(const std::string& st);
 std::string StringFromScoreType(ScoreType st);
 
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