public static Rune FromUtf8(byte[] value, ref int index)
{
if (index >= value.Length)
{
throw new ArgumentOutOfRangeException("index", "Index out of bounds.");
}
var leading = value[index++];
if (!Utf8.ProcessLeading(leading, out var result, out var bytesRemaining))
{
while (Utf8.ProcessTrailing(leading, ref result, ref bytesRemaining))
{
;
}
}
return(new Rune(result));
}