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by steveklabnik
167 days ago
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> what would be the difference with a binary that's has both a py2 and py3 interpreter and a flag --edition=2 or =3 redirects to either file? The difference is that it's not the entire compiler. Rust's editions are only allowed to change the frontend. At the middle part of the compiler, it's all the same thing, and the differences are completely gone. This is the core of how the interop works, and it also means that you can't just change anything in an edition, only smaller things. But completely changing the language every few years wouldn't be good either, so it's fine in practice. |
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