tomiis4 / Rust

Rust Cheatsheet

File

Setup project

Create project

cargo new <project-name>

Run file

cargo run

Generate exe file

• exe file is generated in ./target/debug cargo build

Hello world

fn main() {
    println!("Hello, world!");
}

Variables

// automatic type 
let var = "String";
 
// set mutability 
let mut var = <value>;
 
// set type
let var: <type> = <value>;
 
/* 
Type:  
        bool           = true, false 
        i, 16, 32, 64  = number in range of x bits, can be negative 
        u, 16, 32, 64  = number in range of x bits, can't be negative 
        f, 64          = decimal numbers 
        String         = string 
*/ 

Tuples

// automatic type
let t = (20, 10, 30);

// set type
let t: (i32, i32, i32) = (20, 10, 30);

let (x, y, z)= t;

t.0 // 20
x // 20

Arrays

// automatic type
let a = [20, 10, 30];

// set type
let a: [i32, 3] = [20, 10, 30];

a[0] // 20

Structs

struct Name {
    value1: <type>,
    value2: <type>,
}

impl Name {
    fn add(&self) -> i32 {
        self.value1 + self.value2
    }
}

let x = Name {
    value1 = 5,
    value2 = 10,
}

x.add() // 15

Functions

fn name() { 
    //... 
} 
 
// return 
fn name() -> <type> { return x } 
 
// parameters  
fn name(param1: <type>) { } 

Logic Statements

If/else

if x {
    // ...
} else if {
    // ...
} else {
    // ...
}

Loop

For-I

for i in 0..10 {
    // ...
}

For-In

for x in y {
    // ...
}

While

while x {
    // ...
}

Project ideas

• name