Improve Optional Comparison model

src/core-taggeds-optional/Optional/Optional.T/Internal.Comparison/Optional.T.InternalComparer.cs

@@ -0,0 +1,13 @@
+using System.Collections.Generic;
+
+namespace System;
+
+partial struct Optional<T>
+{
+    internal sealed class InternalComparer(IComparer<T> comparer) : IComparer<Optional<T>>
+    {
+        public int Compare(Optional<T> x, Optional<T> y)
+            =>
+            x.InternalCompareTo(y, comparer);
+    }
+}

src/core-taggeds-optional/Optional/Optional.T/Optional.T.Comparison.cs

@@ -0,0 +1,11 @@
+using System.Collections.Generic;
+
+namespace System;
+
+partial struct Optional<T>
+{
+    // TODO: Add the tests and open the method
+    internal static IComparer<Optional<T>> CreateComparer(IComparer<T> comparer)
+        =>
+        new InternalComparer(comparer ?? throw new ArgumentNullException(nameof(comparer)));
+}

src/core-taggeds-optional/Optional/Optional/Optional.Comparison.cs

@@ -1,4 +1,6 @@
-namespace System;
+using System.Collections.Generic;
+
+namespace System;
 
 partial class Optional
 {
@@ -7,4 +9,9 @@ internal static int Compare<T>(Optional<T> left, Optional<T> right)
         where T : IComparable<T>
         =>
         left.CompareTo(right);
+
+    // TODO: Add the tests and open the method
+    internal static IComparer<Optional<T>> CreateComparer<T>(IComparer<T> comparer)
+        =>
+        new Optional<T>.InternalComparer(comparer ?? throw new ArgumentNullException(nameof(comparer)));
 }