private Form Build(AntlrInputStream input)
{
var lexer = new QLLexer(input);
var tokenStream = new CommonTokenStream(lexer);
var parser = new QLParser(tokenStream);
var visitor = new AstBuilderVisitor();
var root = parser.form().Accept(visitor);
return(root as Form);
}
public QuestionForm ParseQLStream(TextReader reader)
{
if (reader == null) { throw new ArgumentNullException("reader"); }
var inputStream = new AntlrInputStream(reader);
var lexer = new QLLexer(inputStream);
var tokens = new CommonTokenStream(lexer);
var parser = new QLParser(tokens);
var visitor = new QuestionFormBuilder();
return visitor.Visit(parser.form());
}
public ParsingTask Process(ParsingTask input)
{
if (string.IsNullOrEmpty(input.ParsingInput))
{
input.Errors.Add("Input string is empty");
_canContinue = false;
return(input);
}
QLParser parser = SetupParser(input.ParsingInput);
var errorListener = new ErrorListener();
parser.AddErrorListener(errorListener);
var visitor = new ParseTreeVisitor(new OperatorFactory(new ValueFactory()));
input.Ast = visitor.Visit(parser.form());
errorListener.Errors.ForEach(x => input.Errors.Add(x));
_canContinue = !errorListener.Errors.Any();
return(input);
}