Localized enums in Swift

Localizable.strings

"Test_a" = "AAAAA";
"Test_b" = "BBBBB";
"Test_c" = "CCCCC";
"Test_d" = "DDDDD";

LocalizedEnums.swift

enum Test: LocalizedStringConvertible {
    case a, b, c, d
}

print(Test.a, Test.b, Test.c, Test.d)
// a b c d

print(Test.a.resourceKey, Test.b.resourceKey, Test.c.resourceKey, Test.d.resourceKey)
// Test_a Test_b Test_c Test_d

print(Test.a.localizedDescription, Test.b.localizedDescription, Test.c.localizedDescription, Test.d.localizedDescription)
// AAAAA BBBBB CCCCC DDDDD

LocalizedStringConvertible.swift

import Foundation

protocol LocalizedStringConvertible {
    var resourceKey: String { get }
    var resourceComment: String { get }
    var localizedDescription: String { get }
}

extension LocalizedStringConvertible {
    var resourceKey: String {
        return "\(String(describing: type(of: self)))_\(String(describing: self))"
    }
    var resourceComment: String {
        return "Localization for value '\(String(describing: self))' in enum '\(String(describing: type(of: self)))'"
    }
    var localizedDescription: String {
        return NSLocalizedString(resourceKey, comment: resourceComment)
    }
}