private static string GetExceptionClause(CatchBlock catchBlock, TranslationContext context)
{
var exceptionTypeName = catchBlock.Test.GetFriendlyName();
if (ExceptionUsageFinder.IsVariableUsed(catchBlock))
{
var filter = (catchBlock.Filter != null)
? " when " + context.Translate(catchBlock.Filter)
: null;
return($" ({exceptionTypeName} {catchBlock.Variable.Name})" + filter);
}
return((catchBlock.Test != typeof(Exception))
? $" ({exceptionTypeName})"
: null);
}
private static string GetCatchBlock(CatchBlock catchBlock, TranslationContext context)
{
var catchBody = context.TranslateCodeBlock(catchBlock.Body);
var exceptionClause = GetExceptionClause(catchBlock, context);
var catchBodyBlock = catchBody.WithCurlyBraces();
if (catchBlock.Variable != null)
{
catchBodyBlock = catchBodyBlock
.Replace($"throw {catchBlock.Variable.Name};", "throw;");
}
return($@"catch{exceptionClause}{catchBodyBlock}
");
}
public static bool IsVariableUsed(CatchBlock catchHandler)
{
if (catchHandler.Variable == null)
{
return(false);
}
var visitor = new ExceptionUsageFinder(catchHandler);
visitor.Visit(catchHandler.Filter);
if (!visitor._usageFound)
{
visitor.Visit(catchHandler.Body);
}
return(visitor._usageFound);
}
private ExceptionUsageFinder(CatchBlock catchHandler)
{
_catchHandler = catchHandler;
}
protected override CatchBlock VisitCatchBlock(CatchBlock @catch)
{
return(VisitConstruct(@catch, base.VisitCatchBlock));
}
