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use crate::natural::Natural;
use malachite_base::num::arithmetic::traits::PowerOf2;
use malachite_base::num::basic::traits::One;
impl PowerOf2<u64> for Natural {
/// Raises 2 to an integer power.
///
/// $f(k) = 2^k$.
///
/// # Worst-case complexity
/// $T(n) = O(n)$
///
/// $M(n) = O(n)$
///
/// where $T$ is time, $M$ is additional memory, and $n$ is `pow`.
///
/// # Examples
/// ```
/// extern crate malachite_base;
///
/// use malachite_base::num::arithmetic::traits::PowerOf2;
/// use malachite_nz::natural::Natural;
///
/// assert_eq!(Natural::power_of_2(0), 1);
/// assert_eq!(Natural::power_of_2(3), 8);
/// assert_eq!(Natural::power_of_2(100).to_string(), "1267650600228229401496703205376");
/// ```
#[inline]
fn power_of_2(pow: u64) -> Natural {
Natural::ONE << pow
}
}