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-rw-r--r--decoder/hg_io.cc5
1 files changed, 4 insertions, 1 deletions
diff --git a/decoder/hg_io.cc b/decoder/hg_io.cc
index 5161931d..6a5561e6 100644
--- a/decoder/hg_io.cc
+++ b/decoder/hg_io.cc
@@ -332,7 +332,10 @@ bool HypergraphIO::WriteToJSON(const Hypergraph& hg, bool remove_rules, ostream*
o << (j == 0 ? "" : ",") << mapped_edge;
}
o << "]";
- if (node.cat_ < 0) { o << ",\"cat\":\"" << TD::Convert(node.cat_ * -1) << '"'; }
+ if (node.cat_ < 0) {
+ o << ",\"cat\":";
+ JSONParser::WriteEscapedString(TD::Convert(node.cat_ * -1), &o);
+ }
o << "}";
}
o << "}\n";