Computed paths example does not compile

[atacan]

Describe the bug

The Computed paths example in the Readme.md file does not compile.
There were typos with the argument names. I fixed them below and added the compiler errors.

To Reproduce

@CasePathable // 🔴 Circular reference resolving attached macro 'CasePathable'
enum Authentication { // 🔴 Circular reference
    case authenticated(accessToken: String)
    case unauthenticated
}

extension Authentication.AllCasePaths { // 🔴 'AllCasePaths' is not a member type of enum 'Authentication'
    var encrypted: AnyCasePath<Authentication, String> {
        AnyCasePath(
            embed: { decryptedToken in
                    .authenticated(accessToken: encrypt(decryptedToken))
            },
            extract: { authentication in
                guard
                    case let .authenticated(encryptedToken) = authentication,
                    let decryptedToken = decrypt(encryptedToken) // 🔴 Initializer for conditional binding must have Optional type, not 'String'
                else { return nil }
                return decryptedToken
            }
        )
    }
}

func encrypt(_ input: String) -> String {
    fatalError()
}
func decrypt(_ input: String) -> String {
    fatalError()
}

Expected behavior

The example demonstrates the computed paths properly.

Environment

• swift-case-paths 1.5.4
• Xcode 15.4
• Swift 5.10
• OS: macOS 14

Readme for easy reference

@CasePathable
enum Authentication {
  case authenticated(accessToken: String)
  case unauthenticated
}

extension Authentication.AllCasePaths {
  var encrypted: AnyCasePath<Authentication, String> {
    AnyCasePath(
      embed: { decryptedToken in
        .authenticated(token: encrypt(decryptedToken))
      },
      extract: { authentication in
        guard
          case let .authenticated(encryptedToken) = authentication,
          let decryptedToken = decrypt(token)
        else { return nil }
        return decryptedToken
      }
    )
  }
}

\Authentication.Cases.encrypted
// CaseKeyPath<Authentication, String>

[stephencelis]

@atacan This is a Swift bug that should be fixed in version 6. If you're in version 5.10 or below you need to define extensions of macro-generated types in a separate file to work around the bug.

Since this isn't an issue with the library I'm going to convert to a discussion, but let us know if we're missing something!