learning-rust

QoL

Cargo Watch

cargo install cargo-watch
cargo watch -q -c -w src/ -x 'run'
cargo watch -q -c -w src/ -x 'test'

Cargo Watch Alias

# Using notepad popup below, place script within
notepad $profile

function cargoWatchR {
    cargo watch -q -c -w src/ -x 'run'
}

function cargoWatchT {
    cargo watch -q -c -w src/ -x 'test'
}

function cargoWatchTP($a) {
    cargo watch -q -c -w src/ -x "test $a"
}

function cargoRun {
    cargo run
}

function wasmPackWeb {
    wasm-pack build --target web
}

Set-Alias cwr cargoWatchR
Set-Alias cwt cargoWatchT
Set-Alias cwtp cargoWatchTP
New-Alias cr cargoRun
New-Alias wpw wasmPackWeb

if (!(Get-Service ssh-agent | ? {$_.Status -eq 'Running'})) {
    Start-Service ssh-agent
}

ssh-add

# enable ps scripts in windows

Traits

Derive vs Impl traits

https://stackoverflow.com/questions/64393455/what-is-difference-between-derive-attribute-and-implementing-traits-for-structur
https://www.reddit.com/r/rust/comments/h8bpj6/a_very_basic_question_in_regard_to_derive_and_impl/

Explanation:

Derive is using a macro to implement trait into struct- cannot do it for Display because there is no one-way to display signed integers for example

Generics

struct MyBox<T>(T);

impl<T> MyBox<T> {
    fn new(x: T) -> MyBox<T> {
        MyBox(x)
    }
}

Explanation:

// Declaration of a struct that takes in a generic and creates a tuple with that particular generic type
// {} are missing because everything can be done in a single line declaration
struct MyBox<T>(T);

// impl<T> declares the use of generic parameter
//       here is where you can enter generics (either lifetimes or types, eg 'a, T, etc)
// MyBox<T> declares what type the below methods are implemented for
impl<T> MyBox<T> {
    fn new(x: T) -> MyBox<T> {
        MyBox(x)
    }
}

Parameters

Turbofish

fn main() {
    let s = "Hello, World!";
// ::<String> is called turbofish- used to tell rust what type this function should be converted into
    let string = s.into::<String>();
}

Windows + WSL

Need to install this before being able to build anything

sudo apt-get update
sudo apt install build-essential libssl-dev pkg-config