[elektronjunge]

You may also be interested in this post[1] by nrc for a couple of strategies for implementing graphs. And this companion[2] by Niko Matsakis.

[1] https://github.com/nrc/r4cppp/blob/master/graphs/README.md [2] http://smallcultfollowing.com/babysteps/blog/2015/04/06/mode...