Macro union_struct 

macro_rules! union_struct {
    (
        ($($vis:tt)*),
        $name: ident,
        $single: ty,
        $([$t: ident, $cons: ident, $c: expr, $x: ident]),*
    ) => { ... };
}

Defines unions.

Malachite provides Union2, but you can also define Union3, Union4, and so on, in your program using the code below. The documentation for Union2 and describes these other enums as well.

use malachite_base::union_struct;
use malachite_base::unions::UnionFromStrError;
use std::fmt::{self, Display, Formatter};
use std::str::FromStr;

union_struct!(
    (pub(crate)),
    Union3,
    Union3<T, T, T>,
    [A, A, 'A', a],
    [B, B, 'B', b],
    [C, C, 'C', c]
);
union_struct!(
    (pub(crate)),
    Union4,
    Union4<T, T, T, T>,
    [A, A, 'A', a],
    [B, B, 'B', b],
    [C, C, 'C', c],
    [D, D, 'D', d]
);
union_struct!(
    (pub(crate)),
    Union5,
    Union5<T, T, T, T, T>,
    [A, A, 'A', a],
    [B, B, 'B', b],
    [C, C, 'C', c],
    [D, D, 'D', d],
    [E, E, 'E', e]
);
union_struct!(
    (pub(crate)),
    Union6,
    Union6<T, T, T, T, T, T>,
    [A, A, 'A', a],
    [B, B, 'B', b],
    [C, C, 'C', c],
    [D, D, 'D', d],
    [E, E, 'E', e],
    [F, F, 'F', f]
);
union_struct!(
    (pub(crate)),
    Union7,
    Union7<T, T, T, T, T, T, T>,
    [A, A, 'A', a],
    [B, B, 'B', b],
    [C, C, 'C', c],
    [D, D, 'D', d],
    [E, E, 'E', e],
    [F, F, 'F', f],
    [G, G, 'G', g]
);
union_struct!(
    (pub(crate)),
    Union8,
    Union8<T, T, T, T, T, T, T, T>,
    [A, A, 'A', a],
    [B, B, 'B', b],
    [C, C, 'C', c],
    [D, D, 'D', d],
    [E, E, 'E', e],
    [F, F, 'F', f],
    [G, G, 'G', g],
    [H, H, 'H', h]
);