private static void AnalyzeMethodDeclaration(SyntaxNodeAnalysisContext context)
{
var methodDeclaration = (MethodDeclarationSyntax)context.Node;
if (methodDeclaration.ContainsDiagnostics)
{
return;
}
if (!methodDeclaration.IsParentKind(SyntaxKind.ClassDeclaration, SyntaxKind.StructDeclaration, SyntaxKind.RecordDeclaration, SyntaxKind.RecordStructDeclaration))
{
return;
}
if (methodDeclaration.Modifiers.ContainsAny(
SyntaxKind.AbstractKeyword,
SyntaxKind.VirtualKeyword,
SyntaxKind.OverrideKeyword,
SyntaxKind.PartialKeyword))
{
return;
}
ParameterInfo parameterInfo = SyntaxInfo.ParameterInfo(methodDeclaration);
if (!parameterInfo.Success)
{
return;
}
if (ContainsOnlyThrowNewExpression(parameterInfo.Body))
{
return;
}
IMethodSymbol methodSymbol = context.SemanticModel.GetDeclaredSymbol(methodDeclaration, context.CancellationToken);
if (methodSymbol == null)
{
return;
}
if (SymbolUtility.IsEventHandlerMethod(methodSymbol))
{
return;
}
if (!methodSymbol.ExplicitInterfaceImplementations.IsDefaultOrEmpty)
{
return;
}
if (methodSymbol.ImplementsInterfaceMember(allInterfaces: true))
{
return;
}
UnusedParameterWalker walker = null;
try
{
walker = UnusedParameterWalker.GetInstance();
walker.SetValues(context.SemanticModel, context.CancellationToken);
FindUnusedNodes(parameterInfo, walker);
if (walker.Nodes.Count > 0 &&
!MethodReferencedAsMethodGroupWalker.IsReferencedAsMethodGroup(methodDeclaration, methodSymbol, context.SemanticModel, context.CancellationToken))
{
foreach (KeyValuePair <string, NodeSymbolInfo> kvp in walker.Nodes)
{
ReportDiagnostic(context, kvp.Value.Node);
}
}
}
finally
{
if (walker != null)
{
UnusedParameterWalker.Free(walker);
}
}
}
public static void Free(UnusedParameterWalker walker)
{
walker.SetValues(default(SemanticModel), default(CancellationToken));
_cachedInstance = walker;
}