public void SyntaxError(IRecognizer recognizer, IToken offendingSymbol, int line, int charPositionInLine, string msg, RecognitionException e)
{
AnyErrors = true;
CrawlParser parser = (CrawlParser)recognizer;
IntervalSet set = parser.GetExpectedTokens();
string help =
$"Symbolet {CrawlLexer.ruleNames[offendingSymbol.Type]} er ikke tilladt på dette punkt. En af de følgende var forventet:\n\t" +
string.Join("\n\t", set.ToArray().Select(x => parser.Vocabulary.GetDisplayName(x)));
int intrestinglocation = offendingSymbol.TokenIndex;
//for (int i = intrestinglocation; i < offendingSymbol.TokenIndex + 20; i++)
//{
// if (parser.TokenStream.Get(i).Channel == Lexer.DefaultTokenChannel)
// {
// intrestinglocation = i;
// break;
// }
//}
Errors.Add(CompilationMessage.Create(
parser.TokenStream,
Interval.Of(intrestinglocation, intrestinglocation),
MessageCode.UnexpectedSymbol,
$"{_file}:{line},{charPositionInLine}",
help,
MessageSeverity.Error));
}
private static CrawlParser.Translation_unitContext ParseFile(Stream file)
{
//First we need to open specified file.
AntlrInputStream fs = new AntlrInputStream(file);
//An ITokenSource lets us get the tokens one at a time.
ITokenSource ts = new CrawlLexer(fs);
//An ITokenStream lets us go forwards and backwards in the token-series.
ITokenStream tstream = new CommonTokenStream(ts);
//That's what our parser wants.
CrawlParser parser = new CrawlParser(tstream);
return(parser.translation_unit());
}
public static ParseTreeData ReadFileToPt(string path, SideeffectHelper helper)
{
ICharStream charStream = new AntlrFileStream(path, Encoding.UTF8);
CrawlLexer tokenSource = new CrawlLexer(charStream);
ITokenStream tokenStream = new CommonTokenStream(tokenSource);
CompilationMessageErrorListner cm = new CompilationMessageErrorListner(helper.CompilationMessages, path);
CrawlParser parser = new CrawlParser(tokenStream);
parser.RemoveErrorListeners();
parser.AddErrorListener(cm);
CrawlParser.Translation_unitContext translationUnit = parser.translation_unit();
return(new ParseTreeData(tokenStream, translationUnit, path));
}
public static CrawlSyntaxTree ReadFile(string filename)
{
ICharStream charStream = new AntlrFileStream(filename, Encoding.UTF8);
CrawlLexer tokenSource = new CrawlLexer(charStream);
ITokenStream tokenStream = new CommonTokenStream(tokenSource);
CrawlParser parser = new CrawlParser(tokenStream);
//The translation_unit is the top rule in our grammar.
//Asking the parser to match that from the token stream leaves us at the top of the parse tree.
CrawlParser.Translation_unitContext rootContext = parser.translation_unit();
TranslationUnitNode node = ParseTreeParser.ParseTranslationUnit(rootContext);
node.OwningTree.CompilationUnitName = filename;
return(node.OwningTree);
}
