rust / beginner
Snippet
Creating Struct Instances
Structs group related data. The 'impl' block attaches methods to a struct. 'Self' refers to the struct type, 'self' refers to the instance. The 'new' constructor pattern is conventional. Instance fields are accessed using dot notation.
snippet.rs
rust
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struct Person {name: String,age: u32,active: bool,}impl Person {fn new(name: &str, age: u32) -> Self {Self { name: String::from(name), age, active: true }}fn introduce(&self) {println!("Hi, I'm {} and I'm {} years old", self.name, self.age);}}fn main() {let alice = Person::new("Alice", 30);let bob = Person { name: String::from("Bob"), age: 25, active: true };alice.introduce();println!("{} is active: {}", bob.name, bob.active);}
Breakdown
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struct Person { ... }
Struct definition with three fields of different types
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impl Person { fn new(...) -> Self { ... } }
Associated function as constructor returning Self
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let alice = Person::new("Alice", 30);
Call constructor using :: syntax
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alice.introduce();
Method call uses dot notation, self is borrowed