Function integer_max 

pub const fn integer_max<T>(a: T, b: T) -> T
where
    T: IntegerPrimitive,

🔬This is a nightly-only experimental API. (core_intrinsics)

Integer maximum, signed or unsigned depending on T.

Allowed only on uN, iN, usize, and isize. (Not on bool nor on char.)

Stabilized as u16::max and i64::max and similar.