Generate rust struct with documentation

gen.rs

macro_rules! generate_import_struct {
    ($doc:expr, name: $name:ident, $($element: ident: $ty: ty : $elem_doc: expr),*) => {
        #[doc=$doc]
        pub struct $name {
            pub id: i32,
            $(#[doc=$elem_doc]
              pub $element: $ty),*
        }
    }
}

generate_import_struct!("Documentation of struct",
                        name: import_test,
                        test_field: String: "Just a test field",
                        another_field: i32: "Make integers happen"
                        );