From 907623732651b22111d116948a2a1be4be2175f8 Mon Sep 17 00:00:00 2001
From: Andreas Stöckel <astoecke@techfak.uni-bielefeld.de>
Date: Sun, 25 Jan 2015 18:49:27 +0100
Subject: Added EnumHash hash functino for use with enum classes and unordered
 containers

---
 src/core/common/Utils.hpp | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'src')

diff --git a/src/core/common/Utils.hpp b/src/core/common/Utils.hpp
index 564c5e6..a88c716 100644
--- a/src/core/common/Utils.hpp
+++ b/src/core/common/Utils.hpp
@@ -179,6 +179,18 @@ public:
 	 * lowercase.
 	 */
 	static std::string extractFileExtension(const std::string &filename);
+
+	/**
+	 * Hash functional to be used for enum classes.
+	 * See http://stackoverflow.com/a/24847480/2188211
+	 */
+	struct EnumHash {
+		template <typename T>
+		std::size_t operator()(T t) const
+		{
+			return static_cast<std::size_t>(t);
+		}
+	};
 };
 }
 
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