object Process(ExpectedValueEnum expectedValueType)
{
object val = null;
AntlrInputStream input = new AntlrInputStream(paramExprContent);
ParamExprGrammarLexer lexer = new ParamExprGrammarLexer(input);
CommonTokenStream tokens = new CommonTokenStream(lexer);
ParamExprGrammarParser parser = new ParamExprGrammarParser(tokens);
parser.RemoveErrorListeners();
ParamExprLogger.resetStream();
parser.AddErrorListener(new ParamExprErrorListener());
IParseTree tree = parser.param_expr();
ParseTreeWalker walker = new ParseTreeWalker();
ParamExprListener eval = new ParamExprListener(tokens);
eval.RevitElement = _element;
eval.RevitParameterName = _paramName;
try
{
walker.Walk(eval, tree);
if (eval.HasValue)
{
val = eval.Value;
UnitType = eval.UnitType;
}
}
catch
{
}
return(val);
}
/// <summary>
/// Checking for syntax error
/// </summary>
/// <param name="recognizer">recognizer</param>
/// <param name="offendingSymbol">offending symbol</param>
/// <param name="line">line number of the statement</param>
/// <param name="charPositionInLine">position within the line</param>
/// <param name="msg">message</param>
/// <param name="e">recognizer exception</param>
public override void SyntaxError(IRecognizer recognizer, IToken offendingSymbol, int line, int charPositionInLine, string msg, RecognitionException e)
{
string stackList = null;
IList <string> stack = ((Parser)recognizer).GetRuleInvocationStack();
stack.Reverse();
for (int i = 0; i < stack.Count(); i++)
{
if (i == 0)
{
stackList = "[";
}
stackList = stackList + " " + stack[i];
}
stackList = stackList + "]";
ParamExprLogger.writeLog("\t\t-> rule stack: " + stackList + "\n");
ParamExprLogger.writeLog("\t\t-> line " + line + ":" + charPositionInLine + " at " + offendingSymbol + ": " + msg + "\n");
}
