Added support of boxed value reference

dotnet · Aug 17, 2024 · bd0a56e · bd0a56e
1 parent 29a3202
commit bd0a56e
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Showing 2 changed files with 18 additions and 0 deletions.
diff --git a/src/DotNext.Tests/Runtime/ValueReferenceTests.cs b/src/DotNext.Tests/Runtime/ValueReferenceTests.cs
@@ -147,6 +147,16 @@ public static void ReferenceSize()
         Equal(Unsafe.SizeOf<ValueReference<float>>(), nint.Size + nint.Size);
     }
 
+    [Fact]
+    public static void BoxedValueInterop()
+    {
+        var boxedInt = BoxedValue<int>.Box(42);
+        ValueReference<int> reference = boxedInt;
+
+        boxedInt.Value = 56;
+        Equal(boxedInt.Value, reference.Value);
+    }
+
     private record class MyClass : IResettable
     {
         internal static string StaticObject;

diff --git a/src/DotNext/Runtime/BoxedValue.cs b/src/DotNext/Runtime/BoxedValue.cs
@@ -101,6 +101,14 @@ namespace DotNext.Runtime;
     [return: NotNullIfNotNull(nameof(value))]
     public static explicit operator BoxedValue<T>?(in T? value) => TryBox(in value);
 
+    /// <summary>
+    /// Obtains a reference to the boxed value.
+    /// </summary>
+    /// <param name="boxedValue">Boxed value.</param>
+    /// <returns>Mutable reference to the boxed value.</returns>
+    public static implicit operator ValueReference<T>(BoxedValue<T> boxedValue)
+        => new(boxedValue, ref boxedValue.Value);
+
     /// <inheritdoc />
     public abstract override bool Equals([NotNullWhen(true)] object? obj);  // abstract to avoid inlining by AOT/JIT