Namespace collision with RxSwift

[damien-rivet]

Description

When both swift-perception & RxSwift are added as dependencies to a project, both packages are imported in a file and one class is decorated with @Perceptible it produces a compilation error.

Checklist

• I have determined that this bug is not reproducible using Swift's observation tools. If the bug is reproducible using the @Observable macro or another tool from the Observation framework, please file it directly with Apple.
• If possible, I've reproduced the issue using the main branch of this package.
• This issue hasn't been addressed in an existing GitHub issue or discussion.

Expected behavior

The generated code should look like the following:

extension DummyObject: Perception.Perceptible, Observation.Observable {
}

A very small change but it would negates all potential namespace collision for people that relies on both packages.

Actual behavior

The macro will generate the following code:

extension DummyObject: Perception.Perceptible, Observable {
}

Where Observable is not coming from Observation but from RxSwift (link) which causes a compilation issue as this class is generic but not the base object.

Steps to reproduce

1. Create a new App with Xcode
2. Add both swift-perception & RxSwift packages as SPM dependencies on the project (include them in the App dependencies)
3. Create a new empty file
4. Import both packages in the file
5. Add an empty class that is decorated with the @Perceptible macro
6. Build the App

The empty class:

import Perception
import RxSwift

@Perceptible
final class DummyObject { }

Fortunately, the workaround is to implement the perception macro manually.

extension DummyObject: Perception.Perceptible, Observation.Observable {
}

Here is a sample project: NamespaceCollisionWithRxSwift.zip

Perception version information

1.4.1

Destination operating system

iOS 18.2

Xcode version information

16.2

Swift Compiler version information

swift-driver version: 1.115.1
Apple Swift version 6.0.3 (swiftlang-6.0.3.1.10 clang-1600.0.30.1)
Target: arm64-apple-macosx15.0