For those that don't know what it means for a data structure to be "intrusive", here's a link: http://stackoverflow.com/questions/5004162/what-does-it-mean-for

For those that don't know what it means for a data structure to be "intrusive", here's a link: http://stackoverflow.com/questions/5004162/what-does-it-mean-for-a-data-structure-to-be-intrusive http://stackoverflow.com/questions/5004162/what-does-it-mean...