deal with alignments in tree to string grammars

1 files changed, 5 insertions, 4 deletions

diff --git a/decoder/tree2string_translator.cc b/decoder/tree2string_translator.cc
index 61a3aba5..9cf18268 100644
--- a/decoder/tree2string_translator.cc
+++ b/decoder/tree2string_translator.cc
@@ -32,12 +32,12 @@ static void ReadTree2StringGrammar(istream* in, Tree2StringGrammarNode* root, bo
     ++lc;
     if (line.size() == 0 || line[0] == '#') continue;
     std::vector<StringPiece> fields = TokenizeMultisep(line, " ||| ");
-    if (has_multiple_states && fields.size() != 4) {
-      cerr << "Expected 4 fields in rule file but line " << lc << " is:\n" << line << endl;
+    if (has_multiple_states && fields.size() < 5) {
+      cerr << "Expected at least 4 fields in rule file but line " << lc << " is:\n" << line << endl;
       abort();
     }
-    if (!has_multiple_states && fields.size() != 3) {
-      cerr << "Expected 3 fields in rule file but line " << lc << " is:\n" << line << endl;
+    if (!has_multiple_states && fields.size() < 4) {
+      cerr << "Expected at least 3 fields in rule file but line " << lc << " is:\n" << line << endl;
       abort();
     }
     
@@ -73,6 +73,7 @@ static void ReadTree2StringGrammar(istream* in, Tree2StringGrammarNode* root, bo
       cerr << "Not implemented...\n"; abort(); // TODO read in states
     } else {
       os << " ||| " << fields[1] << " ||| " << fields[2];
+      if (fields.size() > 3) os << " ||| " << fields[3];
       rule.reset(new TRule(os.str()));
     }
     cur->rules.push_back(rule);