rombok

boilerplate generation macros like lombok.

It automatically creates pattern implementations such as Getter, Setter, and Builder through attribute macros.

Getter

The Getter macro generates get_{fieldname} and get_{fieldname}_mut methods for each field of the structure.

use rombok::Getter;

#[Getter]
struct Person {
    name: String,
    age: u8,
}

fn main() {
    let person = Person {
        name: "John".to_string(),
        age: 30,
    };

    let name = person.get_name();
    let age = person.get_age();

    println!("Hello, world!: {name}, {age}");
}

Setter

The Setter macro generates a set_{fieldname} method for each field in the structure.

use rombok::Setter;

#[Setter]
struct Person {
    name: String,
    age: u8,
}

fn main() {
    let mut person = Person {
        name: "John".to_string(),
        age: 30,
    };

    person.set_name("Jane".to_string());
    person.set_age(31);

    println!("Hello, world!: {}, {}", person.name, person.age);
}

With

With macro generates a with_{fieldname} method for each field in the structure. Unlike Setter, it modifies the value through move and returns the changed object as the return value.

use rombok::With;

#[With]
struct Person {
    name: String,
    age: u8,
}

fn main() {
    let person = Person {
        name: "".to_string(),
        age: 0,
    }.with_name("Jane".to_string()).with_age(31);

    let person = person.with_name("tom".to_string()).with_age(44);

    println!("Hello, world!: {}, {}", person.name, person.age);
}

Builder

The Builder macro generates a Builder pattern object for the structure, and adds a builder static method to the structure. Each method in builder is implemented through the With pattern.

use rombok::Builder;

#[Builder]
struct Person {
    name: String,
    age: u8,
}

fn main() {
    let person = Person::builder()
        .name("Jane".to_string())
        .age(31)
        .build();

    println!("Hello, world!: {}, {}", person.name, person.age);
}