Optional+isNilOrEmpty.swift

import Foundation

extension Optional where Wrapped: Collection {
    public var isNilOrEmpty: Bool {
        switch self {
        case .none:
            return true
        case .some(let collection):
            return collection.isEmpty
        }
    }
}

import Foundation

extension Optional where Wrapped: Collection {
    public var isNilOrEmpty: Bool {
        return self?.isEmpty ?? true
    }
}