anon func in struct

fn main() {
    let elf = dev::Developer::new_elf_dev("Legolas".to_string());
    let human = dev::Developer::new_human_dev("Not hobit".to_string());
    elf.Log();
    human.Log();
}

mod dev {
    pub struct Developer {
        pub name: String,
        pub get_age: fn() -> i32,
    }

    impl Developer {
        pub fn Log(&self) {
            println!("{}", self.name)
        }

        pub fn new_human_dev(s: String) -> Developer {
            Developer {
                name: s,
                get_age: || -> i32 { 18 },
            }
        }

        pub fn new_elf_dev(s: String) -> Developer {
            Developer {
                name: s,
                get_age: || -> i32 { 945 },
            }
        }
    }
}