private AnchorData FindAnchorSpanOnSameLineAfterToken(TokenData tokenData)
{
// every token after given token on same line is implicitly dependent to the token.
// check whether one of them is an anchor token.
AnchorData lastBaseAnchorData = null;
while (tokenData.IndexInStream >= 0)
{
AnchorData tempAnchorData;
if (this.anchorBaseTokenMap.TryGetValue(tokenData.Token, out tempAnchorData))
{
lastBaseAnchorData = tempAnchorData;
}
// tokenPairIndex is always 0 <= ... < TokenCount - 1
var tokenPairIndex = tokenData.IndexInStream;
if (this.tokenStream.TokenCount - 1 <= tokenPairIndex ||
this.tokenStream.GetTriviaData(tokenPairIndex).SecondTokenIsFirstTokenOnLine)
{
return(lastBaseAnchorData);
}
tokenData = tokenData.GetNextTokenData();
}
return(lastBaseAnchorData);
}
// this can be called with tokens that are outside of token stream
private bool IsFirstTokenOnLine(TokenData tokenData1, TokenData tokenData2)
{
if (tokenData1.Token.RawKind == 0)
{
// reached first line inside of tree
return(true);
}
Contract.Requires(tokenData2 == tokenData1.GetNextTokenData());
// see if there are changes for a given token pair
return(this.GetTriviaData(tokenData1, tokenData2).SecondTokenIsFirstTokenOnLine);
}