private Dictionary <TriviaLocation, SyntaxToken> GetTokensAtEdges(
SyntaxNode root,
TextSpan textSpan
)
{
var tokens = new Dictionary <TriviaLocation, SyntaxToken>();
tokens[TriviaLocation.AfterBeginningOfSpan] = _syntaxFacts.FindTokenOnRightOfPosition(
root,
textSpan.Start,
includeSkipped: false
);
tokens[TriviaLocation.BeforeBeginningOfSpan] = tokens[
TriviaLocation.AfterBeginningOfSpan
].GetPreviousToken(includeZeroWidth: true);
tokens[TriviaLocation.BeforeEndOfSpan] = _syntaxFacts.FindTokenOnLeftOfPosition(
root,
textSpan.End,
includeSkipped: false
);
tokens[TriviaLocation.AfterEndOfSpan] = tokens[
TriviaLocation.BeforeEndOfSpan
].GetNextToken(includeZeroWidth: true);
return(tokens);
}