/// <summary>
/// Parses the given VBA expression.
/// </summary>
/// <param name="expression">The expression to parse. NOTE: Call statements are not supported.</param>
/// <returns>The root of the parse tree.</returns>
public ParserRuleContext Parse(string expression)
{
var stream = new AntlrInputStream(expression);
var lexer = new VBALexer(stream);
var tokens = new CommonTokenStream(lexer);
var parser = new VBAParser(tokens);
parser.AddErrorListener(new ExceptionErrorListener());
ParserRuleContext tree = null;
try
{
parser.Interpreter.PredictionMode = PredictionMode.Sll;
tree = parser.expression();
}
catch (Exception ex)
{
Logger.Warn(ex, "SLL mode failed for {0}. Retrying using LL.", expression);
tokens.Reset();
parser.Reset();
parser.Interpreter.PredictionMode = PredictionMode.Ll;
tree = parser.expression();
}
return(tree);
}
public IParseTree Parse(string moduleName, string moduleCode, IParseTreeListener[] listeners, out ITokenStream outStream)
{
var stream = new AntlrInputStream(moduleCode);
var lexer = new VBALexer(stream);
var tokens = new CommonTokenStream(lexer);
var parser = new VBAParser(tokens);
parser.AddErrorListener(new ExceptionErrorListener());
ParserRuleContext tree = null;
try
{
parser.Interpreter.PredictionMode = PredictionMode.Sll;
tree = parser.startRule();
}
catch (Exception ex)
{
Logger.Warn(ex, "SLL mode failed in module {0}. Retrying using LL.", moduleName);
tokens.Reset();
parser.Reset();
parser.Interpreter.PredictionMode = PredictionMode.Ll;
tree = parser.startRule();
}
foreach (var listener in listeners)
{
ParseTreeWalker.Default.Walk(listener, tree);
}
outStream = tokens;
return(tree);
}
public IParseTree Parse(string moduleName, CommonTokenStream moduleTokens, IParseTreeListener[] listeners, BaseErrorListener errorListener, out ITokenStream outStream)
{
moduleTokens.Reset();
var parser = new VBAParser(moduleTokens);
parser.AddErrorListener(errorListener);
ParserRuleContext tree;
try
{
parser.Interpreter.PredictionMode = PredictionMode.Sll;
tree = parser.startRule();
}
catch (Exception ex)
{
Logger.Warn(ex, "SLL mode failed in module {0}. Retrying using LL.", moduleName);
moduleTokens.Reset();
parser.Reset();
parser.Interpreter.PredictionMode = PredictionMode.Ll;
tree = parser.startRule();
}
foreach (var listener in listeners)
{
ParseTreeWalker.Default.Walk(listener, tree);
}
outStream = moduleTokens;
return(tree);
}
protected override IParseTree Parse(ITokenStream tokenStream, PredictionMode predictionMode, IParserErrorListener errorListener)
{
var parser = new VBAParser(tokenStream);
parser.Interpreter.PredictionMode = predictionMode;
parser.AddErrorListener(errorListener);
return(parser.startRule());
}
private IParseTree Parse(string code, out TokenStreamRewriter outRewriter)
{
var input = new AntlrInputStream(code);
var lexer = new VBALexer(input);
var tokens = new CommonTokenStream(lexer);
var parser = new VBAParser(tokens);
parser.AddErrorListener(new ExceptionErrorListener());
outRewriter = new TokenStreamRewriter(tokens);
var result = parser.startRule();
return(result);
}
private Tuple <VBAParser, ParserRuleContext> Parse(string code)
{
var stream = new AntlrInputStream(code);
var lexer = new VBALexer(stream);
var tokens = new CommonTokenStream(lexer);
var parser = new VBAParser(tokens);
// Don't remove this line otherwise we won't get notified of parser failures.
parser.AddErrorListener(new ExceptionErrorListener());
// If SLL fails we want to get notified ASAP so we can fix it, that's why we don't retry using LL.
parser.Interpreter.PredictionMode = PredictionMode.Sll;
var tree = parser.startRule();
return(Tuple.Create <VBAParser, ParserRuleContext>(parser, tree));
}
private static IParseTree ParseInternal(string code, IParseTreeListener[] listeners, out ITokenStream outStream)
{
var stream = new AntlrInputStream(code);
var lexer = new VBALexer(stream);
var tokens = new CommonTokenStream(lexer);
var parser = new VBAParser(tokens);
parser.AddErrorListener(new ExceptionErrorListener());
foreach (var l in listeners)
{
parser.AddParseListener(l);
}
outStream = tokens;
return(parser.startRule());
}
public (IParseTree tree, ITokenStream tokenStream) Parse(string moduleName, CommonTokenStream moduleTokens, IParseTreeListener[] listeners, BaseErrorListener errorListener)
{
moduleTokens.Reset();
var parser = new VBAParser(moduleTokens);
parser.AddErrorListener(errorListener);
ParserRuleContext tree;
try
{
parser.Interpreter.PredictionMode = PredictionMode.Sll;
tree = parser.startRule();
}
catch (ParsePassSyntaxErrorException syntaxErrorException)
{
var parsePassText = syntaxErrorException.ParsePass == ParsePass.CodePanePass
? "code pane"
: "exported";
Logger.Warn($"SLL mode failed while parsing the {parsePassText} version of module {moduleName} at symbol {syntaxErrorException.OffendingSymbol.Text} at L{syntaxErrorException.LineNumber}C{syntaxErrorException.Position}. Retrying using LL.");
Logger.Debug(syntaxErrorException, "SLL mode exception");
moduleTokens.Reset();
parser.Reset();
parser.Interpreter.PredictionMode = PredictionMode.Ll;
tree = parser.startRule();
}
catch (Exception exception)
{
Logger.Warn($"SLL mode failed while parsing module {moduleName}. Retrying using LL.");
Logger.Debug(exception, "SLL mode exception");
moduleTokens.Reset();
parser.Reset();
parser.Interpreter.PredictionMode = PredictionMode.Ll;
tree = parser.startRule();
}
foreach (var listener in listeners)
{
ParseTreeWalker.Default.Walk(listener, tree);
}
return(tree, moduleTokens);
}
public IParseTree Parse(string code, out ITokenStream outStream)
{
var input = new AntlrInputStream(code);
var lexer = new VBALexer(input);
var tokens = new CommonTokenStream(lexer);
var parser = new VBAParser(tokens);
parser.AddErrorListener(new ExceptionErrorListener());
outStream = tokens;
var result = parser.startRule();
return result;
}
private static IParseTree ParseInternal(string code, IParseTreeListener[] listeners, out ITokenStream outStream)
{
var stream = new AntlrInputStream(code);
var lexer = new VBALexer(stream);
var tokens = new CommonTokenStream(lexer);
var parser = new VBAParser(tokens);
parser.AddErrorListener(new ExceptionErrorListener());
foreach (var l in listeners)
{
parser.AddParseListener(l);
}
outStream = tokens;
return parser.startRule();
}