Rust

Documentation

Installing Rust

curl --proto '=https' --tlsv1.2 https://sh.rustup.rs -sSf | sh

Cargo Project Commands

Hello, Cargo!

  • cargo init: Initialize the current working directory as a Cargo project.

  • cargo new <path>: Create dir <path> and initialize it as a Cargo project.

  • cargo build: Build the project specified by Cargo.toml to target/.

    • Builds to target/debug by default. Specify --release to build to target/release.

  • cargo run: Build the project and run the main() entrypoint in one command.

  • cargo clean: Clean up any built targets and the target/ dir.

  • cargo check: Checks your code to make sure it compiles but doesn’t produce an executable.

  • cargo doc --open: Generates and opens documentation for the dependencies you’ve installed via Cargo.

Enums in Rust

Defining an enum:

enum IpAddrKind {
    V4,
    V6,
}

// Example usage:
fn main() {
    let four: IpAddrKind = IpAddrKind::V4;
    let four: IpAddrKind = IpAddrKind::V6;
}

Enums can hold values within them, by defining enums with parentheses after each variant.

enum IpAddrKind {
    V4(String),
    V6(String),
}

// Example usage:
fn main() {
    let four: IpAddrKind = IpAddrKind::V4("127.0.0.1");
    let four: IpAddrKind = IpAddrKind::V6("00:00:00:00:00:00");
}