Merge pull request #49 from Thundernerd/feature/getting_value

Author: Thundernerd

Runtime/Extensions.cs

@@ -0,0 +1,45 @@
+using System.Collections.Generic;
+
+namespace TNRD
+{
+    public static class Extensions
+    {
+        /// <summary>
+        /// Checks to see if the containing value is valid and returns it through the out parameter if so
+        /// </summary>
+        /// <param name="serializableInterface"></param>
+        /// <param name="value">The containing value, if valid</param>
+        /// <returns>True if the containing value is valid, false if not</returns>
+        public static bool IsDefined<TInterface>(
+            this SerializableInterface<TInterface> serializableInterface,
+            out TInterface value
+        )
+            where TInterface : class
+        {
+            if (serializableInterface == null)
+            {
+                value = default;
+                return false;
+            }
+
+            if (EqualityComparer<TInterface>.Default.Equals(serializableInterface.Value, default))
+            {
+                value = default;
+                return false;
+            }
+
+            value = serializableInterface.Value;
+            return true;
+        }
+        
+        /// <inheritdoc cref="IsDefined{TInterface}"/>
+        public static bool TryGetValue<TInterface>(
+            this SerializableInterface<TInterface> serializableInterface,
+            out TInterface value
+        )
+            where TInterface : class
+        {
+            return IsDefined(serializableInterface, out value);
+        }
+    }
+}