public static bool Lex(string sourceText, string fileName, CSharpParseOptions options, IErrorListener listener,
out ITokenStream tokens)
{
tokens = null;
var parseErrors = ParseErrorData.NewBag();
try
{
var lexer = XSharpLexer.Create(sourceText, fileName, options);
lexer.Options = options;
var tokenStream = lexer.GetTokenStream();
tokenStream.Fill();
tokens = tokenStream;
GetLexerErrors(lexer, tokenStream, parseErrors);
#region Determine if we need to preprocess
bool mustPreprocess = true;
if (options.NoStdDef)
{
mustPreprocess = lexer.MustBeProcessed || lexer.HasPreprocessorTokens;
}
#endregion
XSharpPreprocessor pp = null;
BufferedTokenStream ppStream = null;
pp = new XSharpPreprocessor(lexer, tokenStream, options, fileName, Encoding.Unicode, SourceHashAlgorithm.None, parseErrors);
if (mustPreprocess)
{
var ppTokens = pp.PreProcess();
ppStream = new CommonTokenStream(new XSharpListTokenSource(lexer, ppTokens));
}
else
{
// No Standard Defs and no preprocessor tokens in the lexer
// so we bypass the preprocessor and use the lexer token stream
ppStream = new CommonTokenStream(new XSharpListTokenSource(lexer, tokenStream.GetTokens()));
}
ppStream.Fill();
}
catch (Exception)
{
}
ReportErrors(parseErrors, listener);
return(tokens != null);
}
public static bool Parse(string sourceText, string fileName, CSharpParseOptions options, IErrorListener listener,
out ITokenStream tokens, out XSharpParser.SourceContext tree)
{
tree = null;
tokens = null;
var parseErrors = ParseErrorData.NewBag();
try
{
var lexer = XSharpLexer.Create(sourceText, fileName, options);
lexer.Options = options;
BufferedTokenStream tokenStream = lexer.GetTokenStream();
tokenStream.Fill();
tokens = (ITokenStream)tokenStream;
GetLexerErrors(lexer, tokenStream, parseErrors);
// do we need to preprocess
#region Determine if we really need the preprocessor
bool mustPreprocess = true;
if (lexer.HasPreprocessorTokens || !options.NoStdDef)
{
// no need to pre process in partial compilation
// if lexer does not contain UDCs, Messages or Includes
mustPreprocess = lexer.MustBeProcessed;
}
else
{
mustPreprocess = false;
}
#endregion
XSharpPreprocessor pp = null;
BufferedTokenStream ppStream = null;
pp = new XSharpPreprocessor(lexer, tokenStream, options, fileName, Encoding.Unicode, SourceHashAlgorithm.None, parseErrors);
if (mustPreprocess)
{
var ppTokens = pp.PreProcess();
ppStream = new CommonTokenStream(new XSharpListTokenSource(lexer, ppTokens));
}
else
{
// No Standard Defs and no preprocessor tokens in the lexer
// so we bypass the preprocessor and use the lexer token stream
ppStream = new CommonTokenStream(new XSharpListTokenSource(lexer, tokenStream.GetTokens()));
}
ppStream.Fill();
var parser = new XSharpParser(ppStream);
parser.Interpreter.tail_call_preserves_sll = false; // default = true Setting to FALSE will reduce memory used by parser
parser.Options = options;
tree = null;
parser.RemoveErrorListeners();
parser.Interpreter.PredictionMode = PredictionMode.Sll;
parser.ErrorHandler = new BailErrorStrategy();
try
{
tree = parser.source();
}
catch (Exception)
{
var errorListener = new XSharpErrorListener(fileName, parseErrors);
parser.AddErrorListener(errorListener);
parser.ErrorHandler = new XSharpErrorStrategy();
parser.Interpreter.PredictionMode = PredictionMode.Ll;
ppStream.Reset();
parser.Reset();
try
{
tree = parser.source();
}
catch (Exception)
{
tree = null;
}
}
}
catch (Exception)
{
tree = null;
}
ReportErrors(parseErrors, listener);
return(tree != null);
}
