Rust and systems programming

01Ownership model

Rust uses ownership and borrowing to prevent many memory-safety bugs at compile time. A value has an owner; references borrow access; lifetimes describe how long references may remain valid.

rustBorrow a slice instead of taking ownership

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fn total(values: &[i32]) -> i32 {
    values.iter().sum()
}

fn main() {
    let values = vec![10, 20, 30];
    println!("{}", total(&values));
}

02Explicit errors

rustResult-based failure

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use std::fs;

fn load_config(path: &str) -> Result<String, std::io::Error> {
    fs::read_to_string(path)
}

03Cargo workflow

bashQuality gates

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cargo fmt --check
cargo clippy --all-targets -- -D warnings
cargo test
cargo build --release