private static SyntaxNode CreateNode(IEnumerable<SyntaxNodeOrToken> nodesAndTokens)
{
if (nodesAndTokens == null)
{
throw new ArgumentNullException(nameof(nodesAndTokens));
}
var builder = new SyntaxNodeOrTokenListBuilder(8);
builder.Add(nodesAndTokens);
return builder.ToList().Node;
}
// deal with separated lists and removal of associated separators
public override SeparatedSyntaxList <TNode> VisitList <TNode>(SeparatedSyntaxList <TNode> list)
{
var eolKind = Language.SyntaxFacts.DefaultEndOfLineKind;
var withSeps = list.GetWithSeparators();
bool removeNextSeparator = false;
SyntaxNodeOrTokenListBuilder alternate = null;
for (int i = 0, n = withSeps.Count; i < n; i++)
{
var item = withSeps[i];
SyntaxNodeOrToken visited;
if (item.IsToken) // separator
{
if (removeNextSeparator)
{
removeNextSeparator = false;
visited = default(SyntaxNodeOrToken);
}
else
{
visited = this.VisitListSeparator(item.AsToken());
}
}
else
{
var node = (TNode)item.AsNode();
if (this.IsForRemoval(node))
{
if (alternate == null)
{
alternate = new SyntaxNodeOrTokenListBuilder(n);
alternate.Add(withSeps, 0, i);
}
CommonSyntaxNodeRemover.GetSeparatorInfo(
withSeps, i, eolKind.GetValue(),
out bool nextTokenIsSeparator, out bool nextSeparatorBelongsToNode);
if (!nextSeparatorBelongsToNode &&
alternate.Count > 0 &&
alternate[alternate.Count - 1].IsToken)
{
var separator = alternate[alternate.Count - 1].AsToken();
this.AddTrivia(separator, node);
alternate.RemoveLast();
}
else if (nextTokenIsSeparator)
{
var separator = withSeps[i + 1].AsToken();
this.AddTrivia(node, separator);
removeNextSeparator = true;
}
else
{
this.AddTrivia(node);
}
visited = default;
}
else
{
visited = this.VisitListElement((TNode)item.AsNode());
}
}
if (item != visited && alternate == null)
{
alternate = new SyntaxNodeOrTokenListBuilder(n);
alternate.Add(withSeps, 0, i);
}
if (alternate != null && visited.GetKind() != SyntaxKind.None)
{
alternate.Add(visited);
}
}
if (alternate != null)
{
return(alternate.ToList().AsSeparatedList <TNode>());
}
return(list);
}