Make Optional readonly.

grokys · grokys · commit 8b1efc53ca99 · 2019-11-21T11:56:46.000+01:00
diff --git a/src/Avalonia.Base/Data/Optional.cs b/src/Avalonia.Base/Data/Optional.cs
@@ -20,7 +20,7 @@ namespace Avalonia.Data
     ///   conversion from <typeparamref name="T"/>
     /// - For an missing value, use <see cref="Empty"/> or simply `default`
     /// </remarks>
-    public struct Optional<T>
+    public readonly struct Optional<T>
     {
         private readonly T _value;
 

Original file line number	Diff line number	Diff line change
`@@ -20,7 +20,7 @@ namespace Avalonia.Data`
`20`	`20`	`/// conversion from <typeparamref name="T"/>`
`21`	`21`	/// - For an missing value, use <see cref="Empty"/> or simply `default`
`22`	`22`	`/// </remarks>`
`23`		`- public struct Optional<T>`
	`23`	`+ public readonly struct Optional<T>`
`24`	`24`	`{`
`25`	`25`	`private readonly T _value;`
`26`	`26`