A custom derive implementation for #[derive(with)]

Get started

#[derive(with, Default)]
pub struct Foo {
    pub a: i32,
    pub b: String,
}

#[derive(with, Default)]
pub struct Bar (i32, String);

#[test]
fn test_struct() {
    let foo = Foo::default().with_a(1).with_b(1.to_string());
    assert_eq!(foo.a, 1);
    assert_eq!(foo.b, "1".to_string());
    
    let bar = Bar::default().with_0(1).with_1(1.to_string());
    assert_eq!(bar.0, 1);
    assert_eq!(bar.1, "1".to_string());
}

References

• nrc/derive-new