From 1400adb9f5e8ebf8ea1658d658893f0731b6fc22 Mon Sep 17 00:00:00 2001
From: Chris Dyer <redpony@gmail.com>
Date: Fri, 25 Apr 2014 23:45:32 -0400
Subject: check for non-rescorable hypergraphs

---
 decoder/hg.cc | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'decoder/hg.cc')

diff --git a/decoder/hg.cc b/decoder/hg.cc
index e456fa7c..46543b01 100644
--- a/decoder/hg.cc
+++ b/decoder/hg.cc
@@ -28,6 +28,13 @@ bool Hypergraph::AreNodesUniquelyIdentified() const {
   return true;
 }
 
+bool Hypergraph::ArePreGoalEdgesArity1() const {
+  auto& n = nodes_.back();
+  for (auto eid : n.in_edges_)
+    if (edges_[eid].Arity() != 1) return false;
+  return true;
+}
+
 Hypergraph::Edge const* Hypergraph::ViterbiSortInEdges() {
   NodeProbs nv;
   ComputeNodeViterbi(&nv);
-- 
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