internal static SourceRange GetSignatureHelpSpan <TArgumentList>(
TArgumentList argumentList,
SourceLocation start,
Func <TArgumentList, SyntaxToken> getCloseToken)
where TArgumentList : SyntaxNode
{
var closeToken = getCloseToken(argumentList);
if (closeToken.RawKind != 0 && !closeToken.IsMissing)
{
return(SourceRange.FromBounds(start, closeToken.SourceRange.Start));
}
// Missing close paren, the span is up to the start of the next token.
var lastToken = argumentList.GetLastToken();
var nextToken = lastToken.GetNextToken();
if (nextToken == null)
{
nextToken = argumentList.AncestorsAndSelf().Last().GetLastToken(includeZeroLength: true);
}
return(SourceRange.FromBounds(start, nextToken.SourceRange.Start));
}
