UniRx 에셋 추가

Gameton-06/Assets/Plugins/UniRx/Scripts/InternalUtil/ImmutableList.cs

@@ -0,0 +1,61 @@
+using System;
+
+namespace UniRx.InternalUtil
+{
+    // ImmutableList is sometimes useful, use for public.
+    public class ImmutableList<T>
+    {
+        public static readonly ImmutableList<T> Empty = new ImmutableList<T>();
+
+        T[] data;
+
+        public T[] Data
+        {
+            get { return data; }
+        }
+
+        ImmutableList()
+        {
+            data = new T[0];
+        }
+
+        public ImmutableList(T[] data)
+        {
+            this.data = data;
+        }
+
+        public ImmutableList<T> Add(T value)
+        {
+            var newData = new T[data.Length + 1];
+            Array.Copy(data, newData, data.Length);
+            newData[data.Length] = value;
+            return new ImmutableList<T>(newData);
+        }
+
+        public ImmutableList<T> Remove(T value)
+        {
+            var i = IndexOf(value);
+            if (i < 0) return this;
+
+            var length = data.Length;
+            if (length == 1) return Empty;
+
+            var newData = new T[length - 1];
+
+            Array.Copy(data, 0, newData, 0, i);
+            Array.Copy(data, i + 1, newData, i, length - i - 1);
+
+            return new ImmutableList<T>(newData);
+        }
+
+        public int IndexOf(T value)
+        {
+            for (var i = 0; i < data.Length; ++i)
+            {
+                // ImmutableList only use for IObserver(no worry for boxed)
+                if (object.Equals(data[i], value)) return i;
+            }
+            return -1;
+        }
+    }
+}