AnyEquatable.swift

struct AnyEquatable: Equatable {
    let base: Any
    let isEqual: (_ other: AnyEquatable) -> Bool
    
    init<T: Equatable>(_ base: T) {
        self.base = base
        self.isEqual = { base == $0.base as? T }
    }
  
    public static func ==(lhs: AnyEquatable, rhs: AnyEquatable) -> Bool {
        return lhs.isEqual(rhs)
    }
}