Several answers to this challenge 1) It's doable http://smallcultfollowing.com/babysteps/blog/2015/04/06/modeling-graphs-in-rust-using-vector-indices/ http://s

Several answers to this challenge 1) It's doable http://smallcultfollowing.com/babysteps/blog/2015/04/06/modeling-graphs-in-rust-using-vector-indices/ http://smallcultfollowing.com/babysteps/blog/2015/04/06/mode... 2) Which attack surface would you rather deal with... the small fraction of your graph library that deals with mutability... or all of Adobe Flash? 3) The fact is that "unsafe" doesn't mean unsafe, it means "trust the programmer that this is safe". It's reasonable to assume that safety can be maintained in Rust libraries that use the unsafe keyword.