private void CheckParseRequest(ParseRequest req)
{
try
{
var lexer = new AphidLexer(req.Text);
var parser = new AphidParser(lexer.GetTokens());
parser.Parse();
}
catch (AphidParserException e)
{
var lineCol = TokenHelper.GetLineCol(req.Text, e.UnexpectedToken.Index);
var span = new TextSpan()
{
iStartLine = lineCol.Item1,
iEndLine = lineCol.Item1,
iStartIndex = lineCol.Item2,
iEndIndex = lineCol.Item2 + (e.UnexpectedToken.Lexeme != null ? e.UnexpectedToken.Lexeme.Length : 0)
};
var msg = string.Format(
"Unexpected {0}: {1}, expected {2}",
e.UnexpectedToken.TokenType.ToString(),
e.UnexpectedToken.Lexeme,
e.ExpectedToken);
req.Sink.AddError(req.FileName, msg, span, Severity.Error);
}
}
public override AuthoringScope ParseSource(ParseRequest req)
{
Debug.WriteLine("Parse reason: {0}", req.Reason);
var scope = new AphidAuthoringScope();
//scope.Identifiers = GetTokens(req.Text)
// .Where(x => x.TokenType == AphidTokenType.Identifier)
// .Select(x => x.Lexeme)
// .Distinct()
// .ToArray();
switch (req.Reason)
{
case ParseReason.QuickInfo:
break;
case ParseReason.MemberSelect:
break;
case ParseReason.DisplayMemberList:
break;
case ParseReason.CompleteWord:
break;
case ParseReason.MatchBraces:
case ParseReason.MemberSelectAndHighlightBraces:
case ParseReason.HighlightBraces:
var braces = TokenHelper.GetBraces(
req.Text,
req.Line,
req.Col - 1);
if (braces != null)
{
req.Sink.MatchPair(CreateSpan(braces[0][0], braces[0][1]), CreateSpan(braces[1][0], braces[1][1]), 1);
}
var index = TokenHelper.GetIndex(req.Text, req.Line, req.Col - 1);
var str = req.Text.Substring(index);
var tokens = new AphidLexer(str).GetAllTokens();
var depth = 1;
var rightBraceIndex = -1;
for (int i = 1; i < tokens.Count; i++)
{
switch (tokens[i].TokenType)
{
case AphidTokenType.LeftBrace:
depth++;
break;
case AphidTokenType.RightBrace:
depth--;
break;
}
if (depth == 0)
{
rightBraceIndex = index + tokens[i].Index;
break;
}
}
if (rightBraceIndex != -1)
{
var rightLineCol = TokenHelper.GetLineCol(req.Text, rightBraceIndex);
req.Sink.MatchPair(CreateSpan(req.Line, req.Col - 1), CreateSpan(rightLineCol.Item1, rightLineCol.Item2), 1);
}
break;
case ParseReason.Check:
CheckParseRequest(req);
break;
default:
break;
}
return(scope);
}