A couple refactors for `RoslynUtils` and `DefaultSetterGenerator`

ExternalProjects/AnalyzersCommon/RoslynUtils.cs

@@ -6,12 +6,8 @@ using System.Threading;
 
 public static class RoslynUtils
 {
-	public static SyntaxNode? EnclosingTypeDeclarationSyntax(this CSharpSyntaxNode node)
-	{
-		var parent = node.Parent;
-		while (parent is not (null or TypeDeclarationSyntax)) parent = parent.Parent;
-		return parent;
-	}
+	public static TypeDeclarationSyntax? EnclosingTypeDeclarationSyntax(this CSharpSyntaxNode node)
+		=> node.NearestAncestorOfType<TypeDeclarationSyntax>();
 
 	public static string GetMethodName(this ConversionOperatorDeclarationSyntax cods)
 		=> cods.ImplicitOrExplicitKeyword.ToString() is "implicit"
@@ -132,9 +128,21 @@ public static class RoslynUtils
 		SyntaxNodeAnalysisContext snac)
 			=> list.Matching(targetAttrSym, snac.SemanticModel, snac.CancellationToken);
 
+	public static T? NearestAncestorOfType<T>(this CSharpSyntaxNode node)
+		where T : CSharpSyntaxNode
+		=> node.Parent?.FirstAncestorOrSelf<T>();
+
 	public static TextSpan Slice(this TextSpan span, int start)
 		=> TextSpan.FromBounds(start: span.Start + start, end: span.End);
 
 	public static TextSpan Slice(this TextSpan span, int start, int length)
 		=> new(start: span.Start + start, length: length);
+
+	public static string ToMetadataNameStr(this NameSyntax nameSyn)
+		=> nameSyn switch
+		{
+			QualifiedNameSyntax qual => $"{qual.Left.ToMetadataNameStr()}.{qual.Right.ToMetadataNameStr()}",
+			SimpleNameSyntax simple => simple.Identifier.ValueText,
+			_ => throw new InvalidOperationException(),
+		};
 }

ExternalProjects/BizHawk.SrcGen.ReflectionCache/ReflectionCacheGenerator.cs

@@ -4,6 +4,8 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 
+using BizHawk.Analyzers;
+
 [Generator]
 public sealed class ReflectionCacheGenerator : ISourceGenerator
 {
@@ -35,14 +37,8 @@ public sealed class ReflectionCacheGenerator : ISourceGenerator
 
 		public void OnVisitSyntaxNode(SyntaxNode syntaxNode)
 		{
-			static string Ser(NameSyntax nameSyn) => nameSyn switch
-			{
-				SimpleNameSyntax simple => simple.Identifier.ValueText,
-				QualifiedNameSyntax qual => $"{Ser(qual.Left)}.{Ser(qual.Right)}",
-				_ => throw new InvalidOperationException(),
-			};
 			if (_namespace != null || syntaxNode is not NamespaceDeclarationSyntax syn) return;
-			var newNS = Ser(syn.Name);
+			var newNS = syn.Name.ToMetadataNameStr();
 			if (!newNS.StartsWith("BizHawk.", StringComparison.Ordinal)) return;
 			_namespaces.Add(newNS);
 			if (_namespaces.Count == SAMPLE_SIZE) _namespace = CalcNamespace();

ExternalProjects/BizHawk.SrcGen.SettingsUtil/DefaultSetterGenerator.cs

@@ -5,12 +5,14 @@ using System.Collections.Immutable;
 using System.Linq;
 using System.Text;
 
+using BizHawk.Analyzers;
+
 [Generator]
 public class DefaultSetterGenerator : ISourceGenerator
 {
 	public class SyntaxReceiver : ISyntaxContextReceiver
 	{
-		public readonly List<(ClassDeclarationSyntax, SemanticModel)> ClassDeclarations = new();
+		public readonly List<(ClassDeclarationSyntax CDS, SemanticModel SemanticModel)> ClassDeclarations = new();
 
 		public void OnVisitSyntaxNode(GeneratorSyntaxContext context)
 		{
@@ -82,26 +84,26 @@ public class DefaultSetterGenerator : ISourceGenerator
 		{
 			return;
 		}
+		var consumerAttrSym = context.Compilation.GetTypeByMetadataName("BizHawk.Emulation.Common.CoreSettingsAttribute");
+		if (consumerAttrSym is null) return;
 
 		// Generated source code
 		var source = new StringBuilder(@"
-namespace BizHawk.Common
+namespace BizHawk.Emulation.Cores
 {
 	public static partial class SettingsUtil
 	{");
 
-		foreach (var (cds, semanticModel) in syntaxReceiver.ClassDeclarations)
-		{
-			if (cds.AttributeLists.SelectMany(e => e.Attributes)
-			    .Any(e => e.Name.NormalizeWhitespace().ToFullString() == "CoreSettings"))
+		foreach (var (cds, semanticModel) in syntaxReceiver.ClassDeclarations
+			.Where(tuple => tuple.CDS.AttributeLists.Matching(
+				consumerAttrSym,
+				tuple.SemanticModel,
+				context.CancellationToken).Any()))
 		{
 			var symbol = semanticModel.GetDeclaredSymbol(cds, context.CancellationToken);
-				if (symbol is not null) // probably never happens?
-				{
+			if (symbol is null) continue; // probably never happens?
 			CreateDefaultSetter(source, symbol);
 		}
-			}
-		}
 
 		source.Append(@"
 	}

src/BizHawk.Emulation.Cores/Computers/Commodore64/C64.ISettable.cs

@@ -1,6 +1,5 @@
 using System.ComponentModel;
 
-using BizHawk.Common;
 using BizHawk.Emulation.Common;
 
 namespace BizHawk.Emulation.Cores.Computers.Commodore64

src/BizHawk.Emulation.Cores/Computers/MSX/MSX.ISettable.cs

@@ -1,5 +1,5 @@
 using System.ComponentModel;
-using BizHawk.Common;
+
 using BizHawk.Emulation.Common;
 
 namespace BizHawk.Emulation.Cores.Computers.MSX