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Jamie Thompson

Freelancing, previously hacking compilers at the Scala Center.

I love to share ideas about programming, whether it is though speaking, producing video tutorials, or engaging in the learning process to deliver the best materials for newcomers.

As a software engineer, my passions are programming language design, and simplifying APIs.

Project 1 IconAdd method unrolling to Scala 3

Port Mill build.sc files to Scala 3

Project URL this project is still in progress...

Summary: Enhance the Scala language to support binary compatible addition of parameters.

About the Project

Implement the specification of SIP-61, which specifies code generation of forwarder methods that match the signature of a method, before a parameter was added.

Current Status

The PR is open, tracking the current progress.

The feature is implemented, and passing the automated tests. The PR is currently under review from the SIP committee and Scala 3 maintainers.

Done:

  • ✅ New annotation @scala.annotation.unroll to enable the feature.
  • ✅ New phase after typechecking, before pickling, to generate forwarder methods.
  • ✅ Detect correct usage of the annotation in prior "posttyper" phase.
  • ✅ Lazy transform - only run transform where the annotation is used.
  • ✅ Documentation page
  • ✅ Report errors with incorrect usage.
  • ✅ Detect problematic cases with transparent inline (where forwarders are not yet visible).
  • ✅ Test edge cases such as incremental compilation.
  • ✅ Test usage on case class, enum, class, trait and object.

Still to do:

  • 🚧 Potentially change implementation based on feedback.
Port Mill build.sc files to Scala 3