Rust TutorialLesson 21Free preview

Rust Borrowing

This lesson is part of Rust · All levels

Summary

This lesson discusses the mechanism of borrowing through reference in Rust. Instead of transferring ownership, the function can lend access to the data using the '&' symbol. Rust applies a strict rule: You can have multiple immutable references, OR only one mutable reference at a time.

Key points

References are made using the ampersand symbol '&' without transferring ownership
By default, the reference is read-only (immutable reference)
The mutable reference is made with '&mut' to change the borrowed data
The rule of thumb: at one time, there can be multiple "&T" OR exactly one "&mut T"

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