Ruby's `%w(…)` as Rust macro. https://play.rust-lang.org/?gist=8b71c62ab51585b7e977d95601ba1a08&version=stable&backtrace=0

playground.rs

macro_rules! w {
    ($($x:ident)+) => {
        vec![$(stringify!($x),)*]
    }
}

#[test]
fn ident_vec() {
    assert_eq!(w![foo bar baz], vec!["foo", "bar", "baz"]);
}