· Opsnull

Builder Pattern Derive

Rust macro to automatically implement the builder pattern for arbitrary structs. A simple #[derive(Builder)] will generate a FooBuilder for your struct Foo with all setter-methods and a build method.

How it Works

use derive_builder::Builder;

#[derive(Default, Builder, Debug)]
#[builder(setter(into))]
struct Channel {
    token: i32,
    special_info: i32,
    // .. a whole bunch of other fields ..
}

fn main() {
    // builder pattern, go, go, go!...
    let ch = ChannelBuilder::default()
        .special_info(42u8)
        .token(19124)
        .build()
        .unwrap();
    println!("{:?}", ch);
}