From 66ba27cb91b4f81625b8ab535f41bcf38a2aae99 Mon Sep 17 00:00:00 2001
From: Rider Linden <rider@lindenlab.com>
Date: Mon, 27 Nov 2017 10:19:43 -0800
Subject: Added boost::hash<> spec for LLSD

---
 indra/llcommon/lluuid.h | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'indra/llcommon/lluuid.h')

diff --git a/indra/llcommon/lluuid.h b/indra/llcommon/lluuid.h
index dd8660a3c8..fe7482ba29 100644
--- a/indra/llcommon/lluuid.h
+++ b/indra/llcommon/lluuid.h
@@ -31,6 +31,7 @@
 #include <vector>
 #include "stdtypes.h"
 #include "llpreprocessor.h"
+#include <boost/functional/hash.hpp>
 
 class LLMutex;
 
@@ -164,6 +165,25 @@ public:
 	LLAssetID makeAssetID(const LLUUID& session) const;
 };
 
+// Generate a hash of an LLUUID object using the boost hash templates. 
+template <>
+struct boost::hash<LLUUID>
+{
+    typedef LLUUID argument_type;
+    typedef std::size_t result_type;
+    result_type operator()(argument_type const& s) const
+    {
+        result_type seed(0);
+
+        for (S32 i = 0; i < UUID_BYTES; ++i)
+        {
+            boost::hash_combine(seed, s.mData[i]);
+        }
+
+        return seed;
+    }
+};
+
 #endif
 
 
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