From db5394ea002de879ad2c1251127a547fe7d6aeac Mon Sep 17 00:00:00 2001
From: abau <dev@abau.org>
Date: Sun, 10 Jun 2018 15:43:57 +0200
Subject: [PATCH] Add hash function for ToolKey

... to support older compilers.
---
 lib/src/tool/key.hpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/lib/src/tool/key.hpp b/lib/src/tool/key.hpp
index 0264e3c2..a7c57872 100644
--- a/lib/src/tool/key.hpp
+++ b/lib/src/tool/key.hpp
@@ -5,6 +5,8 @@
 #ifndef DILAY_TOOL_KEY
 #define DILAY_TOOL_KEY
 
+#include <functional>
+
 enum class ToolKey
 {
   TransformMesh,
@@ -26,4 +28,12 @@ enum class ToolKey
   MoveCamera
 };
 
+namespace std
+{
+  template <> struct hash<ToolKey>
+  {
+    size_t operator() (const ToolKey& key) const { return std::hash<int> () (int(key)); }
+  };
+}
+
 #endif