public string TryParse(string source, ref int index, ref JsonPath path)
{
if (path == null)
{
return("Start token not found.");
}
index++;
if (source[index] == '*')
{
path = path.Name();
index++;
return(null);
}
var error = source.GetKey(ref index, out var key);
if (error != null)
{
return(error);
}
path = path.Name(key);
return(null);
}