Fix IDE suppression for new analyzer

Author: Sergio0694

CommunityToolkit.Mvvm.SourceGenerators/CommunityToolkit.Mvvm.SourceGenerators.projitems

@@ -55,6 +55,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)Diagnostics\Suppressors\ObservablePropertyAttributeWithPropertyTargetDiagnosticSuppressor.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Diagnostics\DiagnosticDescriptors.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Diagnostics\DiagnosticExtensions.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Diagnostics\SuppressionDescriptors.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Extensions\AttributeDataExtensions.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Extensions\CompilationExtensions.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Extensions\HashCodeExtensions.cs" />

CommunityToolkit.Mvvm.SourceGenerators/Diagnostics/SuppressionDescriptors.cs

@@ -0,0 +1,17 @@
+using Microsoft.CodeAnalysis;
+
+namespace CommunityToolkit.Mvvm.SourceGenerators.Diagnostics;
+
+/// <summary>
+/// A container for all <see cref="SuppressionDescriptors"/> instances for suppressed diagnostics by analyzers in this project.
+/// </summary>
+internal static class SuppressionDescriptors
+{
+    /// <summary>
+    /// Gets a <see cref="SuppressionDescriptor"/> for a field using [ObservableProperty] with on attribute list targeting a property.
+    /// </summary>
+    public static readonly SuppressionDescriptor PropertyAttributeListForObservablePropertyField = new(
+        id: "MVVMTKSPR0001",
+        suppressedDiagnosticId: "CS0657",
+        justification: "Fields using [ObservableProperty] can use [property:] attribute lists to forward attributes to the generated properties");
+}

CommunityToolkit.Mvvm.SourceGenerators/Diagnostics/Suppressors/ObservablePropertyAttributeWithPropertyTargetDiagnosticSuppressor.cs

@@ -8,6 +8,7 @@
 using Microsoft.CodeAnalysis.CSharp;
 using Microsoft.CodeAnalysis.CSharp.Syntax;
 using Microsoft.CodeAnalysis.Diagnostics;
+using static CommunityToolkit.Mvvm.SourceGenerators.Diagnostics.SuppressionDescriptors;
 
 namespace CommunityToolkit.Mvvm.SourceGenerators;
 
@@ -30,14 +31,6 @@ namespace CommunityToolkit.Mvvm.SourceGenerators;
 [DiagnosticAnalyzer(LanguageNames.CSharp)]
 public sealed class ObservablePropertyAttributeWithPropertyTargetDiagnosticSuppressor : DiagnosticSuppressor
 {
-    /// <summary>
-    /// Gets a <see cref="SuppressionDescriptor"/> for a field using [ObservableProperty] with on attribute list targeting a property.
-    /// </summary>
-    private static readonly SuppressionDescriptor PropertyAttributeListForObservablePropertyField = new(
-        id: "MVVMTKSPR0001",
-        suppressedDiagnosticId: "CS0657",
-        justification: "Fields using [ObservableProperty] can use [property:] attribute lists to forward attributes to the generated properties");
-
     /// <inheritdoc/>
     public override ImmutableArray<SuppressionDescriptor> SupportedSuppressions => ImmutableArray.Create(PropertyAttributeListForObservablePropertyField);