Macro carboxyl::lift

macro_rules! lift {
    ($f: expr) => { ... };
    ($f: expr, $a: expr) => { ... };
    ($f: expr, $a: expr, $b: expr) => { ... };
    ($f: expr, $a: expr, $b: expr, $c: expr) => { ... };
    ($f: expr, $a: expr, $b: expr, $c: expr, $d: expr) => { ... };
}