internal static AntlrParseResultEventArgs ParseSnapshot(ITextSnapshot snapshot)
{
Stopwatch timer = Stopwatch.StartNew();
ITokenSource tokenSource = new GrammarLexer(new AntlrInputStream(snapshot.GetText()));
CommonTokenStream tokenStream = new CommonTokenStream(tokenSource);
GrammarParser.GrammarSpecContext parseResult;
GrammarParser parser = new GrammarParser(tokenStream);
List<ParseErrorEventArgs> errors = new List<ParseErrorEventArgs>();
try
{
parser.Interpreter.PredictionMode = PredictionMode.Sll;
parser.RemoveErrorListeners();
parser.BuildParseTree = true;
parser.ErrorHandler = new BailErrorStrategy();
parseResult = parser.grammarSpec();
}
catch (ParseCanceledException ex)
{
if (!(ex.InnerException is RecognitionException))
throw;
tokenStream.Reset();
parser.Interpreter.PredictionMode = PredictionMode.Ll;
//parser.AddErrorListener(DescriptiveErrorListener.Default);
parser.SetInputStream(tokenStream);
parser.ErrorHandler = new DefaultErrorStrategy();
parseResult = parser.grammarSpec();
}
return new AntlrParseResultEventArgs(snapshot, errors, timer.Elapsed, tokenStream.GetTokens(), parseResult);
}
internal static AntlrParseResultEventArgs ParseSnapshot(ITextSnapshot snapshot)
{
Stopwatch timer = Stopwatch.StartNew();
ITokenSource tokenSource = new GrammarLexer(new AntlrInputStream(snapshot.GetText()));
CommonTokenStream tokenStream = new CommonTokenStream(tokenSource);
GrammarParser.GrammarSpecContext parseResult;
GrammarParser parser = new GrammarParser(tokenStream);
List <ParseErrorEventArgs> errors = new List <ParseErrorEventArgs>();
try
{
parser.Interpreter.PredictionMode = PredictionMode.Sll;
parser.RemoveErrorListeners();
parser.BuildParseTree = true;
parser.ErrorHandler = new BailErrorStrategy();
parseResult = parser.grammarSpec();
}
catch (ParseCanceledException ex) when(ex.InnerException is RecognitionException)
{
tokenStream.Reset();
parser.Interpreter.PredictionMode = PredictionMode.Ll;
//parser.AddErrorListener(DescriptiveErrorListener.Default);
parser.SetInputStream(tokenStream);
parser.ErrorHandler = new DefaultErrorStrategy();
parseResult = parser.grammarSpec();
}
return(new AntlrParseResultEventArgs(snapshot, errors, timer.Elapsed, tokenStream.GetTokens(), parseResult));
}
private IList<IAnchor> CreateReferenceAnchorPoints(ITextSnapshot snapshot, GrammarParser.GrammarSpecContext parseResult)
{
if (parseResult == null)
{
AntlrParseResultEventArgs resultEventArgs = Antlr4BackgroundParser.ParseSnapshot(snapshot);
parseResult = (GrammarParser.GrammarSpecContext)resultEventArgs.Result;
}
AnchorListener listener = new AnchorListener(snapshot);
ParseTreeWalker.Default.Walk(listener, parseResult);
return listener.Anchors;
}
public override void EnterGrammarType(GrammarParser.GrammarTypeContext context)
{
EnterAnchor(context);
}
public GrammarTypeAnchor(GrammarParser.GrammarTypeContext context, ITrackingSpan span)
: base(GrammarParser.RULE_grammarType, span)
{
if (context.LEXER() != null)
{
grammarType = GrammarParser.LEXER;
}
else if (context.PARSER() != null)
{
grammarType = GrammarParser.PARSER;
}
else
{
grammarType = GrammarParser.COMBINED;
}
}
public override void ExitRuleSpec(GrammarParser.RuleSpecContext context)
{
ExitAnchor(context, GrammarParser.RULE_ruleSpec);
}
public override void EnterRuleSpec(GrammarParser.RuleSpecContext context)
{
EnterAnchor(context);
}
public override void ExitGrammarType(GrammarParser.GrammarTypeContext context)
{
ExitAnchor(context, GrammarParser.RULE_grammarType);
}
