Demo of how to use `mod math { mod mat; }`

gistfile1.txt

% cat math/mat.rs
pub struct Mat4<T> { x:T }
% cat main.rs
// // Don't do this:
// use math::mat::*;
// // Do this:
mod math { mod mat; }


fn main() {
    use math::mat::Mat4;
    let _m : Mat4<int>;
    io::println("Hello World");
}% 
% cat math/mat.rs
pub struct Mat4<T> { x:T }
% cat main.rs
// // Don't do this:
// use math::mat::*;
// // Do this:
mod math { mod mat; }

fn main() {
    use math::mat::Mat4;
    let _m : Mat4<int>;
    io::println("Hello World");
}
% rustc main.rs
warning: no debug symbols in executable (-arch x86_64)
% ./main
Hello World