internal Variable ProcessTry(ParsingScript script)
{
int startTryCondition = script.Pointer - 1;
int currentStackLevel = ParserFunction.GetCurrentStackLevel();
Exception exception = null;
Variable result = null;
try {
result = ProcessBlock(script);
} catch (Exception exc) {
exception = exc;
}
if (exception != null || result.IsReturn ||
result.Type == Variable.VarType.BREAK ||
result.Type == Variable.VarType.CONTINUE)
{
// We are here from the middle of the try-block either because
// an exception was thrown or because of a Break/Continue. Skip it.
script.Pointer = startTryCondition;
SkipBlock(script);
}
string catchToken = Utils.GetNextToken(script);
script.Forward(); // skip opening parenthesis
// The next token after the try block must be a catch.
if (!Constants.CATCH_LIST.Contains(catchToken))
{
throw new ArgumentException("Expecting a 'catch()' but got [" +
catchToken + "]");
}
string exceptionName = Utils.GetNextToken(script);
script.Forward(); // skip closing parenthesis
if (exception != null)
{
string excStack = CreateExceptionStack(exceptionName,currentStackLevel);
ParserFunction.InvalidateStacksAfterLevel(currentStackLevel);
GetVarFunction excMsgFunc = new GetVarFunction(new Variable(exception.Message));
ParserFunction.AddGlobalOrLocalVariable(exceptionName,excMsgFunc);
GetVarFunction excStackFunc = new GetVarFunction(new Variable(excStack));
ParserFunction.AddGlobalOrLocalVariable(exceptionName + ".Stack",excStackFunc);
result = ProcessBlock(script);
ParserFunction.PopLocalVariable(exceptionName);
}
else
{
SkipBlock(script);
}
SkipRestBlocks(script);
return(result);
}
