twitter/rsc

This system is a Scala compiler (RSC) that provides a modular, phase-based compilation pipeline alongside a Scalafix-based code transformation framework. It handles the full lifecycle of source code: parsing and scanning for both Scala and Java, generating semantic databases, and producing Scala signatures. Additionally, it includes utility scripts for benchmarking and CI, and offers rules to automatically infer types and manage imports for improved code compatibility.

This period focused on establishing the foundational architecture of the RSC compiler, including a modular phase-based execution model, new syntax and semantic data structures, and improved error reporting. Concurrently, the project set up its build system, CI infrastructure, and developer tooling scripts to support ongoing development.

15 changes

This period focused on a comprehensive architectural overhaul of the compiler's parsing and semantic analysis layers. The codebase introduced modular traits for the Scala and Java parsers, implemented a new Java parser, and refactored the semantic analysis and SemanticDB generation into distinct, manageable components. Additionally, infrastructure for Scala signature handling and output management was established to support these new structures.

27 changes

This period focused on supporting Scala 3.0.0-M3 by adding comprehensive example files for new language features and edge cases. Concurrently, the project improved Java classpath resolution by parsing classfile signatures directly, while also fixing classpath resolution for external module references.

8 changes

twitter/rsc was measured the same way every project in this corpus was: the same rubric, at a pinned commit, with the result published in full. Point the surveyor at a repository you know and see whether you agree with it.