public static TokenType[] GetExpectedTokens(int state)
{
var parser = new GherkinEditorParser(new GherkinTokenTagBuilder(null))
{
StopAtFirstError = true
};
try
{
parser.MatchToken(state, new Token(null, new Location()), new ParserContext()
{
//Builder = new NullAstBuilder(),
Errors = new List <ParserException>(),
TokenMatcher = new AllFalseTokenMatcher(),
TokenQueue = new Queue <Token>(),
TokenScanner = new NullTokenScanner()
});
}
catch (UnexpectedEOFException ex)
{
return(ex.ExpectedTokenTypes.Select(type => (TokenType)Enum.Parse(typeof(TokenType), type.TrimStart('#'))).ToArray());
}
return(new TokenType[0]);
}
private GherkinTokenTag[] Parse(ITextSnapshot snapshot)
{
var currentLastResult = lastResult;
if (currentLastResult != null && currentLastResult.SnapshotVersion == snapshot.Version.VersionNumber)
{
return(currentLastResult.Tags);
}
var fileContent = snapshot.GetText();
var stopwatch = new Stopwatch();
stopwatch.Start();
var parserErrors = new List <ParserException>();
var tokenTagBuilder = new GherkinTokenTagBuilder(snapshot);
var parser = new GherkinEditorParser(tokenTagBuilder);
var reader = new StringReader(fileContent);
try
{
parser.Parse(new TokenScanner(reader), new TokenMatcher(VsGherkinDialectProvider.Instance));
}
catch (CompositeParserException compositeParserException)
{
parserErrors.AddRange(compositeParserException.Errors);
}
catch (ParserException parserException)
{
parserErrors.Add(parserException);
}
catch (Exception ex)
{
//nop;
Debug.WriteLine(ex);
}
var tokenTags = new List <GherkinTokenTag>();
tokenTags.AddRange((GherkinTokenTag[])tokenTagBuilder.GetResult());
tokenTags.AddRange(parserErrors.Select(e => new GherkinTokenTag(e, snapshot)));
tokenTags.Sort((t1, t2) => t1.Span.Start.Position.CompareTo(t2.Span.Start.Position));
stopwatch.Stop();
Debug.WriteLine("Gherkin3: parsed v{0} on thread {1} in {2} ms", snapshot.Version.VersionNumber, Thread.CurrentThread.ManagedThreadId, stopwatch.ElapsedMilliseconds);
var result = new ParsingResult(snapshot.Version.VersionNumber, tokenTags.ToArray());
Thread.MemoryBarrier();
lastResult = result;
//TODO: only for the changed scope
if (TagsChanged != null)
{
TagsChanged(this, new SnapshotSpanEventArgs(new SnapshotSpan(snapshot, 0, snapshot.Length)));
}
return(result.Tags);
}