Replace FindReferences with LocalReferenceFinder in VariableNotUsedIssue.

ICSharpCode.NRefactory.CSharp/Refactoring/CodeIssues/VariableNotUsedIssues/LocalVariableNotUsedIssue.cs

@@ -35,19 +35,22 @@ namespace ICSharpCode.NRefactory.CSharp.Refactoring
 					   IssueMarker = IssueMarker.GrayOut)]
 	public class LocalVariableNotUsedIssue : VariableNotUsedIssue
 	{
-		internal override GatherVisitorBase GetGatherVisitor (BaseRefactoringContext context, SyntaxTree unit)
+		internal override GatherVisitorBase GetGatherVisitor (BaseRefactoringContext context)
 		{
-			return new GatherVisitor (context, unit);
+			return new GatherVisitor (context, this);
 		}
 
 		class GatherVisitor : GatherVisitorBase
 		{
-			SyntaxTree unit;
+			LocalReferenceFinder referenceFinder;
 
-			public GatherVisitor (BaseRefactoringContext ctx, SyntaxTree unit)
+			VariableNotUsedIssue inspector;
+
+			public GatherVisitor (BaseRefactoringContext ctx, VariableNotUsedIssue inspector)
 				: base (ctx)
 			{
-				this.unit = unit;
+				this.inspector = inspector;
+				this.referenceFinder = new LocalReferenceFinder(ctx);
 			}
 
 			public override void VisitVariableInitializer (VariableInitializer variableInitializer)
@@ -65,7 +68,8 @@ namespace ICSharpCode.NRefactory.CSharp.Refactoring
 				if (resolveResult == null)
 					return;
 
-				if (FindUsage (ctx, unit, resolveResult.Variable, variableInitializer))
+				var b = inspector.FindUsage(referenceFinder, decl.Parent, resolveResult.Variable, variableInitializer);
+				if (b)
 					return;
 
 				AddIssue (variableInitializer.NameToken, ctx.TranslateString ("Remove unused local variable"),
@@ -90,7 +94,7 @@ namespace ICSharpCode.NRefactory.CSharp.Refactoring
 				if (resolveResult == null)
 					return;
 
-				if (FindUsage (ctx, unit, resolveResult.Variable, foreachStatement.VariableNameToken))
+				if (inspector.FindUsage (referenceFinder, foreachStatement, resolveResult.Variable, foreachStatement.VariableNameToken))
 					return;
 
 				AddIssue (foreachStatement.VariableNameToken, ctx.TranslateString ("Local variable is never used"));

ICSharpCode.NRefactory.CSharp/Refactoring/CodeIssues/VariableNotUsedIssues/ParameterNotUsedIssue.cs

@@ -38,19 +38,22 @@ namespace ICSharpCode.NRefactory.CSharp.Refactoring
 	public class ParameterNotUsedIssue : VariableNotUsedIssue
 	{
 
-		internal override GatherVisitorBase GetGatherVisitor (BaseRefactoringContext context, SyntaxTree unit)
+		internal override GatherVisitorBase GetGatherVisitor (BaseRefactoringContext context)
 		{
-			return new GatherVisitor (context, unit);
+			return new GatherVisitor (context, this);
 		}
 
 		class GatherVisitor : GatherVisitorBase
 		{
-			SyntaxTree unit;
+			VariableNotUsedIssue inspector;
 
-			public GatherVisitor (BaseRefactoringContext ctx, SyntaxTree unit)
+			LocalReferenceFinder referenceFinder;
+
+			public GatherVisitor (BaseRefactoringContext ctx, VariableNotUsedIssue inspector)
 				: base (ctx)
 			{
-				this.unit = unit;
+				this.inspector = inspector;
+				this.referenceFinder = new LocalReferenceFinder(ctx);
 			}
 
 			public override void VisitMethodDeclaration(MethodDeclaration methodDeclaration)
@@ -81,7 +84,8 @@ namespace ICSharpCode.NRefactory.CSharp.Refactoring
 				var resolveResult = ctx.Resolve (parameterDeclaration) as LocalResolveResult;
 				if (resolveResult == null)
 					return;
-				if (FindUsage (ctx, unit, resolveResult.Variable, parameterDeclaration))
+
+				if (inspector.FindUsage (referenceFinder, parameterDeclaration.Parent, resolveResult.Variable, parameterDeclaration))
 					return;
 
 				AddIssue (parameterDeclaration.NameToken, ctx.TranslateString ("Parameter is never used"));

ICSharpCode.NRefactory.CSharp/Refactoring/CodeIssues/VariableNotUsedIssues/VariableNotUsedIssue.cs

@@ -26,35 +26,29 @@
 
 using System.Collections.Generic;
 using System.Linq;
-using ICSharpCode.NRefactory.CSharp.Resolver;
 using ICSharpCode.NRefactory.TypeSystem;
 
 namespace ICSharpCode.NRefactory.CSharp.Refactoring
 {
 	public abstract class VariableNotUsedIssue : ICodeIssueProvider
 	{
-		static FindReferences refFinder = new FindReferences ();
-
 		public IEnumerable<CodeIssue> GetIssues (BaseRefactoringContext context)
 		{
 			var unit = context.RootNode as SyntaxTree;
 			if (unit == null)
 				return Enumerable.Empty<CodeIssue> ();
-			return GetGatherVisitor(context, unit).GetIssues ();
+			return GetGatherVisitor(context).GetIssues ();
 		}
 
-		protected static bool FindUsage (BaseRefactoringContext context, SyntaxTree unit, IVariable variable,
-										 AstNode declaration)
+		public bool FindUsage (LocalReferenceFinder referenceFinder, AstNode rootNode, IVariable variable, AstNode declaration)
 		{
 			var found = false;
-			refFinder.FindLocalReferences (variable, context.UnresolvedFile, unit, context.Compilation,
-				(node, resolveResult) =>
-				{
-					found = found || node != declaration;
-				}, context.CancellationToken);
+			referenceFinder.FindReferences (rootNode, variable,	(node, resolveResult) => {
+				found |= node != declaration;
+			});
 			return found;
 		}
 
-		internal abstract GatherVisitorBase GetGatherVisitor (BaseRefactoringContext context, SyntaxTree unit);
+		internal abstract GatherVisitorBase GetGatherVisitor (BaseRefactoringContext context);
 	}
 }