Rust cargo commands and features

Initial the project

The information of how to setup and initial the project and how to use cargo command.

Contents

• Install
• Language features
• Cargo

Install

• Install the latest stable version of Rust using rustup

• Write and run a “Hello, world!” program using rustc directly

• Using a ! means that you’re calling a macro instead of a normal function

Language Feature

• Rust is an ahead-of-time compiled language
• Rust is a strong type check language
• Rust allows us to shadow the previous value with a new one
  • This feature is often used in situations in which you want to convert a value from one type to another type
• u32 seen here is an unsigned 32-bit integer

let guess: u32 = guess.trim().parse().expect("Need a number");

Cargo

• Cargo is Rust’s build system and package manager
  • building your code
  • downloading the libraries your code depends on
  • cargo check just check the code can be complies does not produce an executable
  • cargo build only build and produce an executable ./target/debug
  • cargo run build and run
  • cargo build --release build and optimizations for benchmark and production target/release
  • cargo test -- sub-mod name