1 files changed, 10 insertions, 0 deletions
diff --git a/common/util.h b/common/util.h
index c888c8b8..a9ad2172 100644
--- a/common/util.h
+++ b/common/util.h
@@ -21,6 +21,7 @@
 #define UTIL_H
 
 #include <map>
+#include <set>
 #include <string>
 #include "nextpnr.h"
 
@@ -65,6 +66,15 @@ template <typename K, typename V> std::map<K, V *> sorted(const std::unordered_m
     return retVal;
 };
 
+// Wrap an unordered_set, and allow it to be iterated over sorted by key
+template <typename K> std::set<K> sorted(const std::unordered_set<K> &orig)
+{
+    std::set<K> retVal;
+    for (auto &item : orig)
+        retVal.insert(item);
+    return retVal;
+};
+
 NEXTPNR_NAMESPACE_END
 
 #endif