A fast, simple, integer power function for Swift. By default Swift does not ship with a `pow` function that takes two `Int` arguments.

intpow.swift

//
//  IntPow.swift
//
//  Created by Khan Winter on 5/1/25.
//

/// Raises an integer to a positive power.
@inlinable
public func pow(_ base: Int, _ exp: UInt) -> Int {
    var exp = exp
    var base = base
    var result = 1
    repeat {
        if exp & 1 != 0 {
            result *= base
        }
        exp >>= 1
        base *= base
    } while exp != 0
    return result
}