Rust Introduction

• A nice alternative to C++
• Compiles to native programs 🚀
• Has the very nice package manager Cargo

Expecience

• 🎞 https://github.com/tgotwig/vidmerger
• 🏃 https://github.com/TGotwig/cardio/blob/master/rust-cardio/src/main.rs
• 📦 https://lib.rs/crates/rustscan
• 👷 rust-unofficial/patterns#90 (formated)

Motivation

• 🎉 1.0 released in 15.05.2015
• 🤩 Powerful extension for VSCode
• 🐧 In the Linux cernel is Rust code linus-torvalds-weighs-in-on-rust-language-in-the-linux-kernel
• 📚 Many high level functions available
• 👶 Cross compiling is more or less easy
• 😃 You can write an operating system with Rust https://www.redox-os.org
• 🤖 Automatic code generation from swagger file https://openapi-generator.tech/docs/generators
• 👮 Memory safety: Forces you to fix unsafe code
• 🚀 Can boost web applications via WebAssembly
• 📋 Very good documentation, always a code example
• 🤔 A very smooth and active forum where you can ask questions https://users.rust-lang.org
• 🤯 Metaprogramming (Macros) which are functions with additional powers: inline_python, serde_json

Naming differences

☕️ Java	🦀 Rust
Maven	Cargo
Checkstyle	Clippy
class	impl
List	Vec
interface	struct / trait
Lambda	Closure
switch case	match

Objects

Rust has no new keyword, you have to have a function which is called new inside of an impl thing:

• struct Sheep {/* bunch of field signatures */} // basically an interface for fields
• trait Animal {/* bunch of method signatures */} // basically an interface for methods, can also contain implementations
• impl Sheep {/* bunch of methods with the fields from struct */} // from that you can create an object:
  • Sheep::new("Dolly"); // would need implementation for new
• impl Animal for Sheep {/* implemented methods from Animal */} // Implements Animal trait for Sheep:
  • let mut dolly: Sheep = Animal::new("Dolly");

from https://doc.rust-lang.org/rust-by-example/trait.html

Borrowing

Drops say after calling print_out/1:

fn main() {
  let say = String::from("Cat");
  print_out(say);
  println!("Again: {}", say); // ERROR
}

fn print_out(to_print: String) {
  println!("{}", to_print);
}

Returns say after calling print_out/1:

fn main() {
  let say = String::from("Cat");
  print_out(&say);
  println!("Again: {}", say);
}

fn print_out(to_print: &String) {
  println!("{}", to_print);
}

Compiler

Sometimes the compiler says what to do to fix a problem:

24 |       let format_args: &str = match matches.value_of("format") {
   |  _____________________________^
25 | |         Some(x) => x,
26 | |         None => "avchd,avi,flv,mkv,mov,mp4,webm,wmv",
27 | |     };
   | |_____^ help: replace with: `matches.value_of("format").unwrap_or("avchd,avi,flv,mkv,mov,mp4,webm,wmv")`

Learning

• Videos
  • Hello Rust! // funny tutorial 😆
  • Beginner's Series to: Rust // 35 small videos from Microsoft from 06.2021
  • Programmieren in Rust // lectures from university
  • Jon Gjengset // Long and advanced videos, multiple hours long
  • Rust's Journey to Async/Await // Rust creator about Async/Await