From 518ead2e2dd11ba3bcd19085c2c91178ba9e458c Mon Sep 17 00:00:00 2001
From: David Shah <dave@ds0.me>
Date: Mon, 12 Oct 2020 11:41:26 +0100
Subject: nexus: IO pre-packing

Signed-off-by: David Shah <dave@ds0.me>
---
 common/util.h | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'common')

diff --git a/common/util.h b/common/util.h
index 9512bd40..d82e984a 100644
--- a/common/util.h
+++ b/common/util.h
@@ -112,6 +112,15 @@ 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_set, and allow it to be iterated over sorted by key
 template <typename K> std::set<K> sorted(const std::unordered_set<K> &orig)
 {
-- 
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