public object Evaluate(string expression)
{
AntlrInputStream stream = new AntlrInputStream(expression);
CalculatorLexer lexer = new CalculatorLexer(stream);
CommonTokenStream tokenStream = new CommonTokenStream(lexer);
CalculatorParser parser = new CalculatorParser(tokenStream);
var root = parser.expression();
object result = root.Accept(m_processor);
return(result);
}
private int EvaluateInput(string input)
{
CalculatorLexer lexer = new CalculatorLexer(new AntlrInputStream(input));
lexer.RemoveErrorListeners();
lexer.AddErrorListener(new ThrowingErrorListener <int>());
CalculatorParser parser = new CalculatorParser(new CommonTokenStream(lexer));
parser.RemoveErrorListeners();
parser.AddErrorListener(new ThrowingErrorListener <IToken>());
return(new CalculatorVisitor().Visit(parser.expression()));
}