Merge pull request #524 from daveshah1/nextpnr-nexus

Upstreaming basic support for Nexus devices

1 files changed, 18 insertions, 0 deletions

diff --git a/common/util.h b/common/util.h
index 9512bd40..07ebac75 100644
--- a/common/util.h
+++ b/common/util.h
@@ -112,6 +112,24 @@ template <typename K, typename V> std::map<K, V *> sorted(const std::unordered_m
     return retVal;
 };
 
+// Wrap an unordered_map, and allow it to be iterated over sorted by key
+template <typename K, typename V> std::map<K, V &> sorted_ref(std::unordered_map<K, V> &orig)
+{
+    std::map<K, V &> retVal;
+    for (auto &item : orig)
+        retVal.emplace(std::make_pair(item.first, std::ref(item.second)));
+    return retVal;
+};
+
+// Wrap an unordered_map, and allow it to be iterated over sorted by key
+template <typename K, typename V> std::map<K, const V &> sorted_cref(const std::unordered_map<K, V> &orig)
+{
+    std::map<K, const V &> retVal;
+    for (auto &item : orig)
+        retVal.emplace(std::make_pair(item.first, std::ref(item.second)));
+    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)
 {