private TNode InsertModifier(TNode node, SyntaxTokenList modifiers, SyntaxToken modifier, int index)
{
SyntaxToken token;
if (!modifiers.Any() ||
index == modifiers.Count)
{
if (modifiers.Any())
{
token = modifiers.Last().GetNextToken();
}
else
{
AttributeListSyntax attributeList = GetAttributeLists(node).LastOrDefault();
if (attributeList != null)
{
token = attributeList.GetLastToken().GetNextToken();
}
else
{
token = node.GetFirstToken();
}
}
}
else
{
token = modifiers[index];
}
if (token != default(SyntaxToken))
{
SyntaxTriviaList newLeadingTrivia = token.LeadingTrivia;
if (newLeadingTrivia.Any())
{
SyntaxTriviaList leadingTrivia = modifier.LeadingTrivia;
if (!leadingTrivia.IsSingleElasticMarker())
{
newLeadingTrivia = newLeadingTrivia.AddRange(leadingTrivia);
}
modifier = modifier.WithLeadingTrivia(newLeadingTrivia);
SyntaxToken newToken = token.WithoutLeadingTrivia();
if (!modifiers.Any() ||
index == modifiers.Count)
{
node = node.ReplaceToken(token, newToken);
}
else
{
modifiers = modifiers.ReplaceAt(index, newToken);
}
}
if (modifier.TrailingTrivia.IsSingleElasticMarker())
{
modifier = modifier.WithTrailingTrivia(TriviaList(Space));
}
}
modifiers = modifiers.Insert(index, modifier);
return(WithModifiers(node, modifiers));
}