Pull some init logic in enum property operator to static constructor.

Assets/Cryville/Crtr/PropOp.cs

@@ -103,12 +103,15 @@ namespace Cryville.Crtr {
 			readonly static Dictionary<int, int> _cache = new Dictionary<int, int>();
 			readonly Action<T> _cb;
 			readonly Func<int, T> _caster;
-			public Enum(Action<T> cb, Func<int, T> caster) {
+			static Enum() {
 				if (!typeof(T).IsEnum)
 					throw new ArgumentException("Type is not enum");
 				var names = typeof(T).GetFields(BindingFlags.Public | BindingFlags.Static);
 				for (int i = 0; i < names.Length; i++)
 					_cache[IdentifierManager.SharedInstance.Request(names[i].Name)] = Convert.ToInt32(names[i].GetValue(null));
+
+			}
+			public Enum(Action<T> cb, Func<int, T> caster) {
 				_cb = cb;
 				_caster = caster;
 			}