public void AnalyzeNode(SyntaxNode node, SemanticModel semanticModel, Action <Diagnostic> addDiagnostic, AnalyzerOptions options, CancellationToken cancellationToken)
{
var expr = (PrefixUnaryExpressionSyntax)node;
var info = semanticModel.GetAwaitExpressionInfo(expr);
if (!info.IsDynamic)
{
var operand = semanticModel.GetTypeInfo(expr.Operand);
var namedType = operand.Type as INamedTypeSymbol;
if (namedType != null)
{
if (namedType.IsGenericType)
{
var symbol = semanticModel.Compilation.GetTypeByMetadataName("System.Threading.Tasks.Task`1");
if (namedType.ConstructedFrom == symbol)
{
addDiagnostic(Diagnostic.Create(desc, expr.GetLocation()));
}
}
else
{
var symbol = semanticModel.Compilation.GetTypeByMetadataName("System.Threading.Tasks.Task");
if (namedType == symbol)
{
addDiagnostic(Diagnostic.Create(desc, expr.GetLocation()));
}
}
}
}
}