private static IEnumerable <SyntaxTrivia> ResolveTrivia(
TriviaLocation location,
PreviousNextTokenPair tokenPair,
Dictionary <SyntaxToken, LeadingTrailingTriviaPair> triviaMap)
{
var previousTriviaPair = triviaMap.ContainsKey(tokenPair.PreviousToken) ? triviaMap[tokenPair.PreviousToken] : default;
var nextTriviaPair = triviaMap.ContainsKey(tokenPair.NextToken) ? triviaMap[tokenPair.NextToken] : default;
var trailingTrivia = previousTriviaPair.TrailingTrivia ?? SpecializedCollections.EmptyEnumerable <SyntaxTrivia>();
var leadingTrivia = nextTriviaPair.LeadingTrivia ?? SpecializedCollections.EmptyEnumerable <SyntaxTrivia>();
return(tokenPair.PreviousToken.TrailingTrivia.Concat(trailingTrivia).Concat(leadingTrivia).Concat(tokenPair.NextToken.LeadingTrivia));
}
private LeadingTrailingTriviaPair CreateTriviaPairs(
TriviaLocation locationKind,
PreviousNextTokenPair tokenPair,
IEnumerable <SyntaxTrivia> trivia)
{
// beginning of the tree
if (tokenPair.PreviousToken.RawKind == 0)
{
return(new LeadingTrailingTriviaPair {
TrailingTrivia = SpecializedCollections.EmptyEnumerable <SyntaxTrivia>(), LeadingTrivia = trivia
});
}
return(GetTrailingAndLeadingTrivia(locationKind, tokenPair, trivia));
}
private LeadingTrailingTriviaPair GetTrailingAndLeadingTrivia(TriviaLocation locationKind, PreviousNextTokenPair tokenPair, IEnumerable <SyntaxTrivia> trivia)
{
var list = trivia.ToList();
// there are some noisy trivia
var index = GetFirstEndOfLineIndex(list);
return(new LeadingTrailingTriviaPair
{
TrailingTrivia = CreateTriviaListFromTo(list, 0, index),
LeadingTrivia = CreateTriviaListFromTo(list, index + 1, list.Count - 1)
});
}