carbon-language/carbon-lang v0.0.0-0.nightly.2025.05.21

Nightly build 2025.05.21

on GitHub

What's Changed

Proposals accepted and merged 📜

• Updates to pattern matching for objects by @geoffromer in #5164
• Interface extension and final impl update by @josh11b in #5337

Toolchain and implementation changes 🛠️

• Refactor toolchain/check/testdata/interop/cpp/no_prelude/function_decl.carbon by @bricknerb in #5477
• Better diagnostic message in CHECK by @geoffromer in #5504
• Use TypeEnum for ScopeId to refactor call structure by @jonmeow in #5491
• Restructure FormatInstRhs to allow for better logic sharing by @jonmeow in #5494
• Improve lowering for global variables. by @zygoloid in #5492

Full Changelog: v0.0.0-0.nightly.2025.05.20...v0.0.0-0.nightly.2025.05.21