CoerceValueCallback

Author: JohanLarsson

WpfAnalyzers/Analyzers/PropertyMetadataAnalyzer.cs

@@ -84,7 +84,7 @@ context.Node is ObjectCreationExpressionSyntax objectCreation &&
                 }
 
                 if (propertyMetadata.CoerceValueArgument is { } coerceValueArgument &&
-                    Callback.Match(coerceValueArgument, KnownSymbols.CoerceValueCallback, context.SemanticModel, context.CancellationToken) is { Identifier: { } coerceNode, Target: { } coerce })
+                    CoerceValueCallback.Match(coerceValueArgument, context.SemanticModel, context.CancellationToken) is { Identifier: { } coerceNode, Target: { } coerce })
                 {
                     if (TypeSymbolComparer.Equal(coerce.ContainingType, context.ContainingSymbol.ContainingType) &&
                         !coerce.Name.IsParts("Coerce", registeredName))

WpfAnalyzers/Helpers/CoerceValueCallback.cs

@@ -0,0 +1,27 @@
+namespace WpfAnalyzers;
+
+using System.Threading;
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.CSharp.Syntax;
+
+internal readonly struct CoerceValueCallback
+{
+    internal readonly IdentifierNameSyntax Identifier;
+    internal readonly IMethodSymbol Target;
+
+    internal CoerceValueCallback(IdentifierNameSyntax identifier, IMethodSymbol target)
+    {
+        this.Identifier = identifier;
+        this.Target = target;
+    }
+
+    internal static CoerceValueCallback? Match(ArgumentSyntax callback, SemanticModel semanticModel, CancellationToken cancellationToken)
+    {
+        if (Callback.Match(callback, KnownSymbols.CoerceValueCallback, semanticModel, cancellationToken) is { } match)
+        {
+            return new CoerceValueCallback(match.Identifier, match.Target);
+        }
+
+        return null;
+    }
+}