private static ITranslatable GetExceptionClauseOrNullFor(CatchBlock catchBlock, ITranslationContext context)
{
if (ExceptionUsageFinder.IsVariableUsed(catchBlock))
{
return((catchBlock.Filter != null)
? new FilteredExceptionClause(catchBlock, context)
: new NamedVariableExceptionClause(catchBlock, context));
}
return((catchBlock.Test != typeof(Exception))
? new AnonymousExceptionClause(catchBlock, context) : null);
}
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);
}
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);
}
