#[macro_use]
extern crate lazy_static;

use std::collections::HashSet;

lazy_static! {
    static ref cross_actions: HashSet<&'static str> =  {
        let h: HashSet<&str> = [
            "string 1",
            "string 2",
            "string 3",
            // etc
        ].iter().cloned().collect();
        h
    };
}

fn main() {
    for s in cross_actions.iter() {
        println!("string: {}", s);
    }
}