Unfortunately since this is from 2015, it does not seem everything is still accurate. For example his demo of a list walk with match: https://play.rust-lang.org/?gist=613e13fd515bfca647ca&versio...

Seems to compile just fine even with the edition set to 2015.

Cute technique, but it looks too syntactically sugary and dangerous.

For instance, if I wanted to make an immutable mutable, I'd rather be explicit:

  let x = "foo".to_string();
  let mut x = x;