Attribute Macro named_args 

#[named_args]

Change the function’s arguments to an anonymous struct object and unpack it.

use structz::*;

#[named_args]
fn print_person(name: &str, age: u8, tags: Vec<&str>) {
    println!("{} is {} years old and has tags {:?}", name, age, tags);
}

print_person(stru! {
    tags: vec!["programmer", "artist"],
    name: "Alice",
    age: 30,
});

The method receivers are not considered part of the anonymous struct object:

use structz::*;

struct Num(i32);
impl Num {
    #[named_args]
    fn add(&mut self, x: i32, y: i32) {
        self.0 += x;
        self.0 += y;
    }
}

let mut num = Num(1);
num.add(stru! { x: 2, y: 3 });
assert_eq!(num.0, 6);