Initial commit

Library/PackageCache/com.unity.timeline@7f8b2fb101b6/Runtime/ObjectId.cs

@@ -0,0 +1,54 @@
+using System;
+
+namespace UnityEngine.Timeline
+{
+    [Serializable]
+    struct ObjectId : IEquatable<ObjectId>, IComparable<ObjectId>
+    {
+        public static readonly ObjectId InvalidId = new ObjectId(-1);
+        public static readonly ObjectId DefaultId = new ObjectId(0);
+
+        [SerializeField]
+        private int m_Data;
+
+        internal ObjectId(int data) => m_Data = data;
+
+#if UNITY_6000_3_OR_NEWER
+        public static implicit operator ObjectId(EntityId entityId)
+        {
+            return new ObjectId() { m_Data = entityId };
+        }
+
+        public static implicit operator EntityId(ObjectId objectId) => objectId.m_Data;
+#else
+        public static implicit operator ObjectId(int instanceId)
+        {
+            return new ObjectId() { m_Data = instanceId };
+        }
+
+        public static implicit operator int(ObjectId objectId) => objectId.m_Data;
+#endif
+        public override bool Equals(object obj) => obj is ObjectId other && Equals(other);
+
+        public bool Equals(ObjectId other) => m_Data == other.m_Data;
+
+        public int CompareTo(ObjectId other) => this.m_Data.CompareTo(other.m_Data);
+
+        public static bool operator ==(ObjectId left, ObjectId right) => left.Equals(right);
+
+        public static bool operator !=(ObjectId left, ObjectId right) => !left.Equals(right);
+
+        public static bool operator <(ObjectId left, ObjectId right) => left.m_Data < right.m_Data;
+
+        public static bool operator >(ObjectId left, ObjectId right) => left.m_Data > right.m_Data;
+
+        public static bool operator <=(ObjectId left, ObjectId right) => left.m_Data <= right.m_Data;
+
+        public static bool operator >=(ObjectId left, ObjectId right) => left.m_Data >= right.m_Data;
+
+        public override int GetHashCode()
+        {
+            return m_Data;
+        }
+    }
+}