May 2026 monthly summary for swiftlang/swift. Focused on expanding compile-time constant extraction to support member function calls on instances, improving builder handling and constant evaluation, with a targeted commit and cross-team collaboration. This work increases reliability of compile-time evaluation, reduces runtime overhead, and contributes to faster builds and more predictable code generation.

December 2025 monthly summary for mrousavy/swift focusing on compile-time constant extraction improvements and variadic argument handling.

Month: 2025-10 — Feature delivered in mrousavy/swift: Swift Compile-time Constant Extraction: Support for Force-Unwrapped Optionals. Adds compile-time extraction for force unwraps, improving type safety and enabling early error detection by treating force unwraps as extractable compile-time constants. Example: let prop: MyType = MyType()! now extracts as a compile-time constant rather than a runtime value. Commit f515cd72c1d8e5abf4bf453831d92d5515ec443d (PR #85047); Co-authored-by: Deniz Dizman. Impact: stronger safety, earlier bug detection, and more reliable builds across CI by catching issues at compile time.