Rust 2024: update Ch. 20 for new `unsafe` rules

rust-lang / book

The Rust Programming Language

https://doc.rust-lang.org/book/

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Closed chriskrycho closed 2 days ago

chriskrycho commented 6 days ago

extern now requires unsafe extern, but in turn allows functions within it to be marked as safe. Add examples to both effects within the text, and update listing numbers accordingly.
#[no_mangle] now requires #[unsafe(no_mangle)]

chriskrycho commented 2 days ago

GitHub is… confused. I am going to close and reopen this PR and see if that helps; if not I will simply recreate it.

Couldn't re-open it, so I recreated it as #4111.