static void Try(string input, int server_version = 0)
{
//var str = new AntlrInputStream(input);
var str = new AntlrInputStream(input);
var lexer = new MySQLLexer(str);
lexer.serverVersion = server_version;
var tokens = new CommonTokenStream(lexer);
var parser = new MySQLParser(tokens);
parser.serverVersion = server_version;
var listener = new ErrorListener <IToken>(parser, lexer, tokens);
parser.AddErrorListener(listener);
var tree = parser.queries();
if (listener.had_error)
{
System.Console.WriteLine("error in parse.");
}
else
{
System.Console.WriteLine("parse completed.");
}
System.Console.WriteLine(tokens.OutputTokens());
System.Console.WriteLine(tree.OutputTree(tokens));
}
private int parseQuery(string query)
{
var t = string.Empty;
IMySQLRecognizerCommon mySQLRecognizerCommon = new MySQLRecognizerCommon(serverVersion, sqlMode);
var lastErrors = new StringBuilder();
var errorListener = new TestErrorListener(lastErrors);
var errorStrategy = new BailErrorStrategy();
var input = new AntlrInputStream(query);
var lexer = new MySQLLexer(input, mySQLRecognizerCommon);
lexer.RemoveErrorListeners();
lexer.AddErrorListener(errorListener);
lexer.serverVersion = serverVersion;
lexer.sqlMode = sqlMode;
lexer.charsets = charsets;
var tokens = new CommonTokenStream(lexer);
var parser = new MySQLParser(tokens, mySQLRecognizerCommon);
parser.serverVersion = serverVersion;
parser.sqlMode = sqlMode;
parser.BuildParseTree = buildParserTree;
parser.ErrorHandler = errorStrategy;
parser.Interpreter.PredictionMode = PredictionMode.SLL;
parser.RemoveParseListeners();
tokens.Fill();
ParserRuleContext tree = default;
try
{
tree = parser.query();
}
catch (Antlr4.Runtime.Misc.ParseCanceledException)
{
// If parsing was cancelled we either really have a syntax error or we need to do a second step,
// now with the default strategy and LL parsing.
tokens.Reset();
parser.Reset();
parser.ErrorHandler = new DefaultErrorStrategy();
parser.Interpreter.PredictionMode = PredictionMode.LL;
parser.AddErrorListener(errorListener);
tree = parser.query();
}
var toks = tokens.GetTokens();
t = input.GetText(new Antlr4.Runtime.Misc.Interval(toks[0].StartIndex, int.MaxValue));
if (dump && buildParserTree)
{
if (tree == null)
{
Trace.TraceInformation(@"No parse tree available");
}
else
{
t = tree.GetText();
parseTreeView = tree.ToStringTree(parser);
var text = $"Token count: {tokens.Size}{Environment.NewLine}{MySQLRecognizerCommon.dumpTree(tree, parser.Vocabulary)}";
Trace.TraceInformation(text.Trim());
}
}
return(parser.NumberOfSyntaxErrors);
}