private static void AnalyzeCatchClause(SyntaxNodeAnalysisContext context)
{
var catchClause = (CatchClauseSyntax)context.Node;
CatchDeclarationSyntax declaration = catchClause.Declaration;
if (declaration == null)
{
return;
}
SemanticModel semanticModel = context.SemanticModel;
CancellationToken cancellationToken = context.CancellationToken;
ILocalSymbol symbol = semanticModel.GetDeclaredSymbol(declaration, cancellationToken);
if (symbol?.IsErrorType() != false)
{
return;
}
ExpressionSyntax expression = null;
Walker walker = null;
try
{
walker = Walker.GetInstance();
walker.Symbol = symbol;
walker.SemanticModel = semanticModel;
walker.CancellationToken = cancellationToken;
walker.VisitBlock(catchClause.Block);
expression = walker.ThrowStatement?.Expression;
}
finally
{
if (walker != null)
{
Walker.Free(walker);
}
}
if (expression != null)
{
DiagnosticHelpers.ReportDiagnostic(
context,
DiagnosticRules.RemoveOriginalExceptionFromThrowStatement,
expression);
}
}