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Assets/SteamVR/Scripts/SteamVR_EnumEqualityComparer.cs

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+//======= Copyright (c) Valve Corporation, All rights reserved. ===============
+
+using System;
+using System.Collections.Generic;
+using System.Linq.Expressions;
+
+namespace Valve.VR
+{
+    struct SteamVREnumEqualityComparer<TEnum> : IEqualityComparer<TEnum> where TEnum : struct
+    {
+        static class BoxAvoidance
+        {
+            static readonly Func<TEnum, int> _wrapper;
+
+            public static int ToInt(TEnum enu)
+            {
+                return _wrapper(enu);
+            }
+
+            static BoxAvoidance()
+            {
+                var p = Expression.Parameter(typeof(TEnum), null);
+                var c = Expression.ConvertChecked(p, typeof(int));
+
+                _wrapper = Expression.Lambda<Func<TEnum, int>>(c, p).Compile();
+            }
+        }
+
+        public bool Equals(TEnum firstEnum, TEnum secondEnum)
+        {
+            return BoxAvoidance.ToInt(firstEnum) == BoxAvoidance.ToInt(secondEnum);
+        }
+
+        public int GetHashCode(TEnum firstEnum)
+        {
+            return BoxAvoidance.ToInt(firstEnum);
+        }
+    }
+
+    public struct SteamVR_Input_Sources_Comparer : IEqualityComparer<SteamVR_Input_Sources>
+    {
+        public bool Equals(SteamVR_Input_Sources x, SteamVR_Input_Sources y)
+        {
+            return x == y;
+        }
+
+        public int GetHashCode(SteamVR_Input_Sources obj)
+        {
+            return (int)obj;
+        }
+    }
+}