ole

// A heterogeneous dictionary with strong types in Swift, https://oleb.net/2022/heterogeneous-dictionary/
// Ole Begemann, April 2022

/// A key in a `HeterogeneousDictionary`.
public protocol HeterogeneousDictionaryKey {
  /// The "namespace" the key belongs to. Every `HeterogeneousDictionary` has its associated domain,
  /// and only keys belonging to that domain can be stored in the dictionary.
  associatedtype Domain
  /// The type of the values that can be stored under this key in the dictionary.
  associatedtype Value

erica

/// Exponentiation operator
infix operator **

extension IntegerArithmetic {
    /// Returns base ^^ exp
    /// - parameter base: the base value
    /// - parameter exp: the exponentiation value
    static func **(base: Self, exp: Int) -> Self {
        return repeatElement(base, count: exp).reduce(1 as! Self, *)
    }