/*
1. Isolated name spaces
*/

// no name conflict
namespace foo{
    struct Foo{
        ...
    }
}
namespace bar{
    struct Foo{
        ...
    }
}


/*
2. Hide rarely used stuff
*/
namespace helpers{
    function i_am_rarely_used();
    struct Utility{
    }
    function work_with_utility();
}

struct MyType{
}

function do_something_with_mytype();


/*
3. Re-export stuff from other units/namespaces
*/
namespace facade{
    public import math_functions_1;
    public import math_functions_2;
    ...
}