Add hash function for ToolKey

... to support older compilers.
abau · Jun 10, 2018 · db5394e · db5394e
1 parent 62d0e48
commit db5394e
Showing 1 changed file with 10 additions and 0 deletions.
diff --git 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