X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=junction%2FMapTraits.h;h=a34a4bc4d5a24b6076206a8c363a3e9d28330744;hb=3ef92edd2bdb5084e12483b746a925ddc7e5fcc8;hp=de83d27dcdf72fa0bf85ec14f739d582cce4509f;hpb=b22562ec3d5ac59c3b3c5359592e9c37e0b16738;p=junction.git

diff --git a/junction/MapTraits.h b/junction/MapTraits.h
index de83d27..a34a4bc 100644
--- a/junction/MapTraits.h
+++ b/junction/MapTraits.h
@@ -22,6 +22,7 @@ template <class T>
 struct DefaultKeyTraits {
     typedef T Key;
     typedef typename turf::util::BestFit<T>::Unsigned Hash;
+    static const Key NullKey = Key(0);
     static const Hash NullHash = Hash(0);
     static Hash hash(T key) {
         return turf::util::avalanche(Hash(key));