protected static IParseTree AntlrParse(string expression)
{
var inputStream = new AntlrInputStream(expression);
var lexer = new ExpressionLexer(inputStream);
var tokenStream = new CommonTokenStream(lexer);
var parser = new ExpressionParser(tokenStream);
parser.RemoveErrorListeners();
parser.AddErrorListener(ParserErrorListener.Instance);
parser.BuildParseTree = true;
return(parser.file()?.expression());
}
internal Result Execute(string formula, out IParseTree tree)
{
ErrorListener listener = new ErrorListener();
listener.Owner = Owner;
listener.ErrorOutput += ErrorOutput;
var stream = new AntlrInputStream(formula);
var lexer = new ExpressionLexer(stream);
var tokens = new CommonTokenStream(lexer);
var parser = new ExpressionParser(tokens);
parser.AddErrorListener(listener);
tree = parser.program();
return(Visit(tree));
}
