book/redirects/choosing-your-guarantees.md

% Choosing your Guarantees

There is a new edition of the book and this is an old link.

Smart pointers are data structures that act like a pointer, but they also have additional metadata and capabilities. The different smart pointers defined in Rust’s standard library provide extra functionality beyond what references provide.

let b = Box::new(5);
println!("b = {b}");

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Here are the relevant sections in the new and old books:

• In the current edition: Ch 15.00 — Smart Pointers
• In the first edition: Ch 4.8 — Choosing your Guarantees