private static void Validate(SyntaxNodeOrTokenList list)
{
for (int i = 0; i < list.Count; i++)
{
var item = list[i];
if ((i & 1) == 0)
{
Debug.Assert(item.IsNode, "Node missing in separated list.");
}
else
{
Debug.Assert(item.IsToken, "Separator token missing in separated list.");
}
}
}
internal SeparatedSyntaxList(SyntaxNodeOrTokenList list)
: this()
{
Validate(list);
// calculating counts is very cheap when list interleaves nodes and tokens
// so lets just do it here.
int allCount = list.Count;
_count = (allCount + 1) >> 1;
_separatorCount = allCount >> 1;
_list = list;
}