Macro uint::construct_uint

macro_rules! construct_uint {
    ($(#[$attr : meta]) * $visibility : vis struct $name : ident(1) ;) => { ... };
    ($(#[$attr : meta]) * $visibility : vis struct $name : ident($n_words : tt) ;) => { ... };
    (@ construct $(#[$attr : meta]) * $visibility : vis struct $name :
 ident($n_words : tt) ;) => { ... };
}