private Reference <T> BuildAstTree <T>(string definition) where T : IAstNode
{
var stream = new AntlrInputStream(definition);
var lexer = new QLLexer(stream);
lexer.RemoveErrorListeners();
lexer.AddErrorListener(new QlErrorListener());
var tokens = new CommonTokenStream(lexer);
var parser = new QLParser(tokens);
parser.RemoveErrorListeners();
parser.AddErrorListener(new QlErrorListener());
var tree = parser.questionnaire();
var qlVisitor = new BuildAstVisitor(m_astFactory, m_domainItemLocator);
return(qlVisitor.Visit(tree).To <T>(m_domainItemLocator));
}
private void AddErrorListener(QLParser parser)
{
parser.RemoveErrorListeners();
parser.AddErrorListener(new AntlrErrorListener(Messages));
}