maint: added livewatch asset

Assets/Plugins/LiveWatchLite/Scripts/WatchVariable/WatchValue.cs

@@ -0,0 +1,55 @@
+using System;
+
+namespace Ingvar.LiveWatch
+{
+    [Serializable]
+    public struct WatchValue<T> : IEquatable<WatchValue<T>> where T : IEquatable<T>
+    {
+        public T Value;
+        public bool IsEmpty;
+        public string ValueText { get; set; }
+        
+        public WatchValue(T value)
+        {
+            Value = value;
+            IsEmpty = false;
+            ValueText = null;
+        }
+        
+        public static WatchValue<T> Empty()
+        {
+            return new WatchValue<T>()
+            {
+                IsEmpty = true,
+            };
+        }
+        
+        public bool Equals(WatchValue<T> other)
+        {
+            return this == other;
+        }
+        
+        public static bool operator ==(WatchValue<T> left, WatchValue<T> right)
+        {
+            if (!left.IsEmpty && !right.IsEmpty)
+                return left.Value.Equals(right.Value);
+
+            return left.IsEmpty == right.IsEmpty;
+        }
+
+        public static bool operator !=(WatchValue<T> left, WatchValue<T> right)
+        {
+            return !(left == right);
+        }
+        
+        public override bool Equals(object obj)
+        {
+            return base.Equals(obj);
+        }
+
+        public override int GetHashCode()
+        {
+            return base.GetHashCode();
+        }
+    }
+}