The equivalent in python-metaphor-land would be that python files clearly designate whether they are py2 or py3, and a single python interpreter can run both py2 and py3 scripts, as well as cross-include files of each version without issue.
Rust editions only (and rarely!) break your code when you decide to upgrade your project's edition. Your public API stays the same as well (IIRC), so upgrading edition doesn't break your dependents either -unless they don't have a new enough version of the compiler to support said newer edition.
Rust editions only (and rarely!) break your code when you decide to upgrade your project's edition. Your public API stays the same as well (IIRC), so upgrading edition doesn't break your dependents either -unless they don't have a new enough version of the compiler to support said newer edition.