rustHow to extend class in Rust lang

In Rust, you can extend a class by using the impl keyword. This allows you to add methods and fields to an existing class. Here is an example of extending a class in Rust:

struct Person {
    name: String,
    age: u8
}

impl Person {
    fn new(name: String, age: u8) -> Person {
        Person {
            name,
            age
        }
    }

    fn get_name(&self) -> &String {
        &self.name
    }
}

fn main() {
    let person = Person::new("John".to_string(), 30);
    println!("Name: {}", person.get_name());
}

Output

Name: John

Explanation:

• struct Person: This defines a struct called Person with two fields, name and age.
• impl Person: This is the impl block which allows us to extend the Person struct.
• fn new: This is a constructor method which takes two parameters, name and age, and returns a Person instance.
• fn get_name: This is a method which takes a &self parameter and returns a reference to the name field of the Person instance.
• let person: This creates a new Person instance using the new constructor method.
• println!: This prints out the name field of the Person instance.

Helpful links:

• Rust Documentation - Impl Blocks
• Rust Documentation - Structs

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