CHANGELOG.md

@@ -20,10 +20,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Removed
 
-- X10D: Removed `DateOnly.Deconstruct` due to conflict with
-[`System.DateOnly.Deconstruct`](https://learn.microsoft.com/en-us/dotnet/api/system.datetime.deconstruct?view=net-8.0).
 - X10D: Removed `Span<T>.Split` for .NET 9.0 target due to conflicts with
-[`System.MemoryExtensions.Split`](https://learn.microsoft.com/en-us/dotnet/api/system.memoryextensions.split?view=net-9.0).
+[`System.MemoryExtensions.Split`](https://learn.microsoft.com/en-us/dotnet/api/system.memoryextensions.split?view=net-8.0).
 
 ## [4.0.0] - 2024-06-12
 

X10D.Tests/src/Time/DateOnlyTests.cs

@@ -39,6 +39,30 @@ internal class DateOnlyTests
         Assert.That(age, Is.EqualTo(18));
     }
 
+    [Test]
+    public void Deconstruct_ShouldDeconstruct_GivenDateOnly()
+    {
+        var date = new DateOnly(2017, 12, 31);
+
+        date.Deconstruct(out int year, out int month, out int day);
+
+        Assert.That(year, Is.EqualTo(2017));
+        Assert.That(month, Is.EqualTo(12));
+        Assert.That(day, Is.EqualTo(31));
+    }
+
+    [Test]
+    public void Deconstruct_ShouldDeconstructToTuple_GivenDateOnly()
+    {
+        var date = new DateOnly(2017, 12, 31);
+
+        (int year, int month, int day) = date;
+
+        Assert.That(year, Is.EqualTo(2017));
+        Assert.That(month, Is.EqualTo(12));
+        Assert.That(day, Is.EqualTo(31));
+    }
+
     [Test]
     public void First_ShouldBeSaturday_Given1Jan2000()
     {

X10D/src/IO/DoubleExtensions.cs

@@ -1,5 +1,6 @@
 using System.Buffers.Binary;
 using System.Diagnostics.Contracts;
+using System.Runtime.InteropServices;
 
 namespace X10D.IO;
 

X10D/src/Time/DateOnlyExtensions.cs

@@ -39,6 +39,20 @@ public static class DateOnlyExtensions
         return value.ToDateTime(default).Age(referenceDate.ToDateTime(default));
     }
 
+    /// <summary>
+    ///     Deconstructs the current <see cref="DateOnly" /> into its year, month, and day.
+    /// </summary>
+    /// <param name="value">The date to deconstruct.</param>
+    /// <param name="year">When this method returns, contains the year.</param>
+    /// <param name="month">When this method returns, contains the month.</param>
+    /// <param name="day">When this method returns, contains the day.</param>
+    public static void Deconstruct(this DateOnly value, out int year, out int month, out int day)
+    {
+        year = value.Year;
+        month = value.Month;
+        day = value.Day;
+    }
+
     /// <summary>
     ///     Gets a date representing the first occurence of a specified day of the week in the current month.
     /// </summary>

tools/SourceGenerator/OverloadSyntaxReceiver.cs

@@ -6,7 +6,7 @@ namespace SourceGenerator;
 
 public class OverloadSyntaxReceiver : ISyntaxReceiver
 {
-    private readonly List<MethodDeclarationSyntax> _candidateMethods = [];
+    private readonly List<MethodDeclarationSyntax> _candidateMethods = new();
 
     public IReadOnlyList<MethodDeclarationSyntax> CandidateMethods
     {