Support AccessModifier for BindableDerivedList

src/ReactiveUI.SourceGenerator.Tests/DERIVEDLIST/BindableDerivedListGeneratorTests.FromReactiveProperties#ReactiveUI.SourceGenerators.BindableDerivedListAttribute.g.verified.cs

@@ -14,6 +14,15 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [global::System.AttributeUsage(global::System.AttributeTargets.Field, AllowMultiple = false, Inherited = false)]
-internal sealed class BindableDerivedListAttribute : global::System.Attribute;
+internal sealed class BindableDerivedListAttribute : global::System.Attribute
+{
+    /// <summary>
+    /// Gets the AccessModifier of the BindableDerivedList property.
+    /// </summary>
+    /// <value>
+    /// The AccessModifier of the property.
+    /// </value>
+    public PropertyAccessModifier AccessModifier { get; init; }
+}
 #nullable restore
 #pragma warning restore

src/ReactiveUI.SourceGenerator.Tests/DERIVEDLIST/DerivedListExtTests.AccessModifiers#ReactiveUI.SourceGenerators.BindableDerivedListAttribute.g.verified.cs

@@ -0,0 +1,28 @@
+//HintName: ReactiveUI.SourceGenerators.BindableDerivedListAttribute.g.cs
+// Copyright (c) 2026 .NET Foundation and Contributors. All rights reserved.
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for full license information.
+
+// <auto-generated/>
+#pragma warning disable
+#nullable enable
+namespace ReactiveUI.SourceGenerators;
+
+/// <summary>
+/// ReactiveAttribute.
+/// </summary>
+/// <seealso cref="Attribute" />
+[global::System.AttributeUsage(global::System.AttributeTargets.Field, AllowMultiple = false, Inherited = false)]
+internal sealed class BindableDerivedListAttribute : global::System.Attribute
+{
+    /// <summary>
+    /// Gets the AccessModifier of the BindableDerivedList property.
+    /// </summary>
+    /// <value>
+    /// The AccessModifier of the property.
+    /// </value>
+    public PropertyAccessModifier AccessModifier { get; init; }
+}
+#nullable restore
+#pragma warning restore

src/ReactiveUI.SourceGenerator.Tests/DERIVEDLIST/DerivedListExtTests.AccessModifiers#TestNs.TestVM.BindableDerivedList.g.verified.cs

@@ -0,0 +1,36 @@
+//HintName: TestNs.TestVM.BindableDerivedList.g.cs
+// <auto-generated/>
+using System.Collections.ObjectModel;
+using DynamicData;
+using ReactiveUI;
+
+#pragma warning disable
+#nullable enable
+
+namespace TestNs
+{
+
+    public partial class TestVM
+    {
+        /// <inheritdoc cref="_publicItems"/>
+        [global::System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+        public global::System.Collections.ObjectModel.ReadOnlyObservableCollection<string>? PublicItems => _publicItems;
+        /// <inheritdoc cref="_protectedItems"/>
+        [global::System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+        protected global::System.Collections.ObjectModel.ReadOnlyObservableCollection<string>? ProtectedItems => _protectedItems;
+        /// <inheritdoc cref="_internalItems"/>
+        [global::System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+        internal global::System.Collections.ObjectModel.ReadOnlyObservableCollection<string>? InternalItems => _internalItems;
+        /// <inheritdoc cref="_privateItems"/>
+        [global::System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+        private global::System.Collections.ObjectModel.ReadOnlyObservableCollection<string>? PrivateItems => _privateItems;
+        /// <inheritdoc cref="_internalProtectedItems"/>
+        [global::System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+        protected internal global::System.Collections.ObjectModel.ReadOnlyObservableCollection<string>? InternalProtectedItems => _internalProtectedItems;
+        /// <inheritdoc cref="_privateProtectedItems"/>
+        [global::System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+        private protected global::System.Collections.ObjectModel.ReadOnlyObservableCollection<string>? PrivateProtectedItems => _privateProtectedItems;
+    }
+}
+#nullable restore
+#pragma warning restore

src/ReactiveUI.SourceGenerator.Tests/DERIVEDLIST/DerivedListExtTests.ComplexGeneric#ReactiveUI.SourceGenerators.BindableDerivedListAttribute.g.verified.cs

@@ -14,6 +14,15 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [global::System.AttributeUsage(global::System.AttributeTargets.Field, AllowMultiple = false, Inherited = false)]
-internal sealed class BindableDerivedListAttribute : global::System.Attribute;
+internal sealed class BindableDerivedListAttribute : global::System.Attribute
+{
+    /// <summary>
+    /// Gets the AccessModifier of the BindableDerivedList property.
+    /// </summary>
+    /// <value>
+    /// The AccessModifier of the property.
+    /// </value>
+    public PropertyAccessModifier AccessModifier { get; init; }
+}
 #nullable restore
 #pragma warning restore

src/ReactiveUI.SourceGenerator.Tests/DERIVEDLIST/DerivedListExtTests.DateTimeType#ReactiveUI.SourceGenerators.BindableDerivedListAttribute.g.verified.cs

@@ -14,6 +14,15 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [global::System.AttributeUsage(global::System.AttributeTargets.Field, AllowMultiple = false, Inherited = false)]
-internal sealed class BindableDerivedListAttribute : global::System.Attribute;
+internal sealed class BindableDerivedListAttribute : global::System.Attribute
+{
+    /// <summary>
+    /// Gets the AccessModifier of the BindableDerivedList property.
+    /// </summary>
+    /// <value>
+    /// The AccessModifier of the property.
+    /// </value>
+    public PropertyAccessModifier AccessModifier { get; init; }
+}
 #nullable restore
 #pragma warning restore

src/ReactiveUI.SourceGenerator.Tests/DERIVEDLIST/DerivedListExtTests.DiffNamespaces#ReactiveUI.SourceGenerators.BindableDerivedListAttribute.g.verified.cs

@@ -14,6 +14,15 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [global::System.AttributeUsage(global::System.AttributeTargets.Field, AllowMultiple = false, Inherited = false)]
-internal sealed class BindableDerivedListAttribute : global::System.Attribute;
+internal sealed class BindableDerivedListAttribute : global::System.Attribute
+{
+    /// <summary>
+    /// Gets the AccessModifier of the BindableDerivedList property.
+    /// </summary>
+    /// <value>
+    /// The AccessModifier of the property.
+    /// </value>
+    public PropertyAccessModifier AccessModifier { get; init; }
+}
 #nullable restore
-#pragma warning restore
+#pragma warning restore

src/ReactiveUI.SourceGenerator.Tests/DERIVEDLIST/DerivedListExtTests.EnumType#ReactiveUI.SourceGenerators.BindableDerivedListAttribute.g.verified.cs

@@ -14,6 +14,15 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [global::System.AttributeUsage(global::System.AttributeTargets.Field, AllowMultiple = false, Inherited = false)]
-internal sealed class BindableDerivedListAttribute : global::System.Attribute;
+internal sealed class BindableDerivedListAttribute : global::System.Attribute
+{
+    /// <summary>
+    /// Gets the AccessModifier of the BindableDerivedList property.
+    /// </summary>
+    /// <value>
+    /// The AccessModifier of the property.
+    /// </value>
+    public PropertyAccessModifier AccessModifier { get; init; }
+}
 #nullable restore
 #pragma warning restore

src/ReactiveUI.SourceGenerator.Tests/DERIVEDLIST/DerivedListExtTests.GenericClass#ReactiveUI.SourceGenerators.BindableDerivedListAttribute.g.verified.cs

@@ -14,6 +14,15 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [global::System.AttributeUsage(global::System.AttributeTargets.Field, AllowMultiple = false, Inherited = false)]
-internal sealed class BindableDerivedListAttribute : global::System.Attribute;
+internal sealed class BindableDerivedListAttribute : global::System.Attribute
+{
+    /// <summary>
+    /// Gets the AccessModifier of the BindableDerivedList property.
+    /// </summary>
+    /// <value>
+    /// The AccessModifier of the property.
+    /// </value>
+    public PropertyAccessModifier AccessModifier { get; init; }
+}
 #nullable restore
-#pragma warning restore
+#pragma warning restore

src/ReactiveUI.SourceGenerator.Tests/DERIVEDLIST/DerivedListExtTests.GuidType#ReactiveUI.SourceGenerators.BindableDerivedListAttribute.g.verified.cs

@@ -14,6 +14,15 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [global::System.AttributeUsage(global::System.AttributeTargets.Field, AllowMultiple = false, Inherited = false)]
-internal sealed class BindableDerivedListAttribute : global::System.Attribute;
+internal sealed class BindableDerivedListAttribute : global::System.Attribute
+{
+    /// <summary>
+    /// Gets the AccessModifier of the BindableDerivedList property.
+    /// </summary>
+    /// <value>
+    /// The AccessModifier of the property.
+    /// </value>
+    public PropertyAccessModifier AccessModifier { get; init; }
+}
 #nullable restore
 #pragma warning restore

src/ReactiveUI.SourceGenerator.Tests/DERIVEDLIST/DerivedListExtTests.InterfaceType#ReactiveUI.SourceGenerators.BindableDerivedListAttribute.g.verified.cs

@@ -14,6 +14,15 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [global::System.AttributeUsage(global::System.AttributeTargets.Field, AllowMultiple = false, Inherited = false)]
-internal sealed class BindableDerivedListAttribute : global::System.Attribute;
+internal sealed class BindableDerivedListAttribute : global::System.Attribute
+{
+    /// <summary>
+    /// Gets the AccessModifier of the BindableDerivedList property.
+    /// </summary>
+    /// <value>
+    /// The AccessModifier of the property.
+    /// </value>
+    public PropertyAccessModifier AccessModifier { get; init; }
+}
 #nullable restore
-#pragma warning restore
+#pragma warning restore

src/ReactiveUI.SourceGenerator.Tests/DERIVEDLIST/DerivedListExtTests.InternalClassGeneratesPublicProperty#ReactiveUI.SourceGenerators.BindableDerivedListAttribute.g.verified.cs

@@ -0,0 +1,28 @@
+//HintName: ReactiveUI.SourceGenerators.BindableDerivedListAttribute.g.cs
+// Copyright (c) 2026 .NET Foundation and Contributors. All rights reserved.
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for full license information.
+
+// <auto-generated/>
+#pragma warning disable
+#nullable enable
+namespace ReactiveUI.SourceGenerators;
+
+/// <summary>
+/// ReactiveAttribute.
+/// </summary>
+/// <seealso cref="Attribute" />
+[global::System.AttributeUsage(global::System.AttributeTargets.Field, AllowMultiple = false, Inherited = false)]
+internal sealed class BindableDerivedListAttribute : global::System.Attribute
+{
+    /// <summary>
+    /// Gets the AccessModifier of the BindableDerivedList property.
+    /// </summary>
+    /// <value>
+    /// The AccessModifier of the property.
+    /// </value>
+    public PropertyAccessModifier AccessModifier { get; init; }
+}
+#nullable restore
+#pragma warning restore

src/ReactiveUI.SourceGenerator.Tests/DERIVEDLIST/DerivedListExtTests.InternalClassGeneratesPublicProperty#TestNs.ViewModel.BindableDerivedList.g.verified.cs

@@ -0,0 +1,21 @@
+//HintName: TestNs.ViewModel.BindableDerivedList.g.cs
+// <auto-generated/>
+using System.Collections.ObjectModel;
+using DynamicData;
+using ReactiveUI;
+
+#pragma warning disable
+#nullable enable
+
+namespace TestNs
+{
+
+    internal partial class ViewModel
+    {
+        /// <inheritdoc cref="_theList"/>
+        [global::System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+        public global::System.Collections.ObjectModel.ReadOnlyObservableCollection<string>? TheList => _theList;
+    }
+}
+#nullable restore
+#pragma warning restore

src/ReactiveUI.SourceGenerator.Tests/DERIVEDLIST/DerivedListExtTests.MultipleLists#ReactiveUI.SourceGenerators.BindableDerivedListAttribute.g.verified.cs

@@ -14,6 +14,15 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [global::System.AttributeUsage(global::System.AttributeTargets.Field, AllowMultiple = false, Inherited = false)]
-internal sealed class BindableDerivedListAttribute : global::System.Attribute;
+internal sealed class BindableDerivedListAttribute : global::System.Attribute
+{
+    /// <summary>
+    /// Gets the AccessModifier of the BindableDerivedList property.
+    /// </summary>
+    /// <value>
+    /// The AccessModifier of the property.
+    /// </value>
+    public PropertyAccessModifier AccessModifier { get; init; }
+}
 #nullable restore
 #pragma warning restore

src/ReactiveUI.SourceGenerator.Tests/DERIVEDLIST/DerivedListExtTests.NestedClass#ReactiveUI.SourceGenerators.BindableDerivedListAttribute.g.verified.cs

@@ -14,6 +14,15 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [global::System.AttributeUsage(global::System.AttributeTargets.Field, AllowMultiple = false, Inherited = false)]
-internal sealed class BindableDerivedListAttribute : global::System.Attribute;
+internal sealed class BindableDerivedListAttribute : global::System.Attribute
+{
+    /// <summary>
+    /// Gets the AccessModifier of the BindableDerivedList property.
+    /// </summary>
+    /// <value>
+    /// The AccessModifier of the property.
+    /// </value>
+    public PropertyAccessModifier AccessModifier { get; init; }
+}
 #nullable restore
 #pragma warning restore

src/ReactiveUI.SourceGenerator.Tests/DERIVEDLIST/DerivedListExtTests.NullableElements#ReactiveUI.SourceGenerators.BindableDerivedListAttribute.g.verified.cs

@@ -14,6 +14,15 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [global::System.AttributeUsage(global::System.AttributeTargets.Field, AllowMultiple = false, Inherited = false)]
-internal sealed class BindableDerivedListAttribute : global::System.Attribute;
+internal sealed class BindableDerivedListAttribute : global::System.Attribute
+{
+    /// <summary>
+    /// Gets the AccessModifier of the BindableDerivedList property.
+    /// </summary>
+    /// <value>
+    /// The AccessModifier of the property.
+    /// </value>
+    public PropertyAccessModifier AccessModifier { get; init; }
+}
 #nullable restore
 #pragma warning restore

src/ReactiveUI.SourceGenerator.Tests/DERIVEDLIST/DerivedListExtTests.RecordClass#ReactiveUI.SourceGenerators.BindableDerivedListAttribute.g.verified.cs

@@ -14,6 +14,15 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [global::System.AttributeUsage(global::System.AttributeTargets.Field, AllowMultiple = false, Inherited = false)]
-internal sealed class BindableDerivedListAttribute : global::System.Attribute;
+internal sealed class BindableDerivedListAttribute : global::System.Attribute
+{
+    /// <summary>
+    /// Gets the AccessModifier of the BindableDerivedList property.
+    /// </summary>
+    /// <value>
+    /// The AccessModifier of the property.
+    /// </value>
+    public PropertyAccessModifier AccessModifier { get; init; }
+}
 #nullable restore
 #pragma warning restore

src/ReactiveUI.SourceGenerator.Tests/DERIVEDLIST/DerivedListExtTests.StructType#ReactiveUI.SourceGenerators.BindableDerivedListAttribute.g.verified.cs

@@ -14,6 +14,15 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [global::System.AttributeUsage(global::System.AttributeTargets.Field, AllowMultiple = false, Inherited = false)]
-internal sealed class BindableDerivedListAttribute : global::System.Attribute;
+internal sealed class BindableDerivedListAttribute : global::System.Attribute
+{
+    /// <summary>
+    /// Gets the AccessModifier of the BindableDerivedList property.
+    /// </summary>
+    /// <value>
+    /// The AccessModifier of the property.
+    /// </value>
+    public PropertyAccessModifier AccessModifier { get; init; }
+}
 #nullable restore
-#pragma warning restore
+#pragma warning restore

src/ReactiveUI.SourceGenerator.Tests/DERIVEDLIST/DerivedListExtTests.TupleType#ReactiveUI.SourceGenerators.BindableDerivedListAttribute.g.verified.cs

@@ -14,6 +14,15 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [global::System.AttributeUsage(global::System.AttributeTargets.Field, AllowMultiple = false, Inherited = false)]
-internal sealed class BindableDerivedListAttribute : global::System.Attribute;
+internal sealed class BindableDerivedListAttribute : global::System.Attribute
+{
+    /// <summary>
+    /// Gets the AccessModifier of the BindableDerivedList property.
+    /// </summary>
+    /// <value>
+    /// The AccessModifier of the property.
+    /// </value>
+    public PropertyAccessModifier AccessModifier { get; init; }
+}
 #nullable restore
 #pragma warning restore

src/ReactiveUI.SourceGenerator.Tests/DERIVEDLIST/DerivedListExtTests.WithReactive#ReactiveUI.SourceGenerators.BindableDerivedListAttribute.g.verified.cs

@@ -14,6 +14,15 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [global::System.AttributeUsage(global::System.AttributeTargets.Field, AllowMultiple = false, Inherited = false)]
-internal sealed class BindableDerivedListAttribute : global::System.Attribute;
+internal sealed class BindableDerivedListAttribute : global::System.Attribute
+{
+    /// <summary>
+    /// Gets the AccessModifier of the BindableDerivedList property.
+    /// </summary>
+    /// <value>
+    /// The AccessModifier of the property.
+    /// </value>
+    public PropertyAccessModifier AccessModifier { get; init; }
+}
 #nullable restore
 #pragma warning restore