Rust7.2 More About Cargo and Crates.io

news/2025/2/2 3:52:19/

Rust学习笔记

Rust编程语言入门教程课程笔记

参考教材: The Rust Programming Language (by Steve Klabnik and Carol Nichols, with contributions from the Rust Community)

Lecture 14: More About Cargo and Crates.io

main.rs

//Customizing Builds with Release Profiles
// cargo profile:
// 1. dev profile: cargo build
// 2. release profile: cargo build --release// customizing release profile
// cargo.toml: profile.release or profile.dev// Filename: Cargo.toml
// [profile.dev]
// opt-level = 0 // no optimization// [profile.release]
// opt-level = 3 // more optimization, slower compile time// use cargo_and_crateio::kinds::PrimaryColor;
// use cargo_and_crateio::utils::mix;use cargo_and_crateio::PrimaryColor;
use cargo_and_crateio::mix;fn main() {let red = PrimaryColor::Red;let yellow = PrimaryColor::Yellow;mix(red, yellow);
}

lib.rs

//Publishing a Crate to Crates.io
//Making Useful Documentation Comments//Commenting Contained Items
//! # cargo_and_crateio
//!
//! `cargo_and_crateio` is a collection of utilities to make performing certain
//! calculations more convenient./// Adds one to the number given.
///
/// # Examples
///
/// ```
/// let arg = 5;
/// let answer = cargo_and_crateio::add_one(arg);
///
/// assert_eq!(6, answer);
/// ```
pub fn add_one(x: i32) -> i32 {x + 1
}
//cargo doc
//run rustdoc tool to generate HTML documentation from the comments. (in the target/doc directory)
//cargo doc --open
//open documentation in browser//commonly used sections:
// 1. Examples
// 2. Panics
// 3. Errors
// 4. Safety//Documentation Comments as Tests
//cargo test//Exporting a Convenient Public API with pub use//Re-exporting Names with pub use// //! # Art
// //!
// //! A library for modeling artistic concepts.pub use self::kinds::PrimaryColor;
pub use self::kinds::SecondaryColor;
pub use self::utils::mix;pub mod kinds {/// The primary colors according to the RYB color model.pub enum PrimaryColor {Red,Yellow,Blue,}/// The secondary colors according to the RYB color model.pub enum SecondaryColor {Orange,Green,Purple,}
}pub mod utils {use crate::kinds::*;/// Combines two primary colors in equal amounts to create/// a secondary color.pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor {// --snip--SecondaryColor::Orange}
}

workplaces

add/Cargo.toml

[workspace]
members = ["adder", "add_one", "add_two"]

add/target/debug: the compliled files

add/adder

Cargo.toml

[package]
name = "adder"
version = "0.1.0"
edition = "2021"[dependencies]
add_one = {path = "../add_one"}

add/adder/src/main.rs

use add_one;fn main() {let num = 10;println!("Hello, world! {} plus one is {}!", num, add_one::add_one(num));
}

add/add_one/src/lib.rs

pub fn add(left: usize, right: usize) -> usize {left + right
}pub fn add_one(num: usize) -> usize {num + 1
}#[cfg(test)]
mod tests {use super::*;#[test]fn it_works() {let result = add(2, 2);assert_eq!(result, 4);}#[test]fn it_adds_one() {let result = add_one(2);assert_eq!(result, 3);}
}

add/add_two/src/lib.rs

pub fn add(left: usize, right: usize) -> usize {left + right
}pub fn add_two(num: usize) -> usize {num + 2
}#[cfg(test)]
mod tests {use super::*;#[test]fn it_works() {let result = add(2, 2);assert_eq!(result, 4);}#[test]fn it_adds_two() {let result = add_two(2);assert_eq!(result, 4);}
}