1 files changed, 12 insertions, 0 deletions
diff --git a/src/common/hash.cpp b/src/common/hash.cpp
new file mode 100644
index 00000000..57e5e914
--- /dev/null
+++ b/src/common/hash.cpp
@@ -0,0 +1,12 @@
+#include <string>
+
+#include "hash.h"
+#include "common/shape.h"
+
+namespace std {
+size_t hash<pair<string, marian::Shape>>::operator()(pair<string, marian::Shape> const& k) const {
+  size_t seed = hash<string>{}(k.first);
+  marian::util::hash_combine(seed, k.second.hash());
+  return seed;
+}
+}  // namespace std