Nightly build 2025.07.30

What's Changed

Toolchain and implementation changes 🛠️

• Add support for using C++ bool type in imported function declarations. by @bricknerb in #5860
• Add support for importing access from C++ to Carbon by @bricknerb in #5858
• Avoid vector copies when building dependent declarations list. by @zygoloid in #5862
• Migrate away from llvm::ArrayRef(std::nullopt_t) by @kazutakahirata in #5867
• Find cycles in rewrite constraints without performing the full exponential expansion of the RHS by @danakj in #5673
• Remove outdated piece of comment on SubstInst by @danakj in #5869
• Adjust ordering of EXTRA-ARGS to allow tests to override includes by @jonmeow in #5870
• Dedupe rewrite constraints without sorting by @danakj in #5864
• Import C++ class A final as Carbon final class. by @zygoloid in #5866

New Contributors

• @kazutakahirata made their first contribution in #5867

Full Changelog: v0.0.0-0.nightly.2025.07.29...v0.0.0-0.nightly.2025.07.30

Nightly build 2025.07.29

What's Changed

Proposals accepted and merged 📜

• Semantic Identity and Order-Dependent Resolution for Rewrite Constraints by @danakj in #5689

Toolchain and implementation changes 🛠️

• Add a dump command in lldb for dumping from ids by @danakj in #5824
• Make minor improvements to ErrorOr based on usage by @chandlerc in #5857
• Support C++ import for anonymous struct and union members. by @zygoloid in #5855
• Support for importing C++ base classes. by @zygoloid in #5856
• Ensure vtable entries for generics are attached constants by @dwblaikie in #5853

Documentation changes 📝

• Note we are using Clang 16+ in the contribution tools docs by @danakj in #5861

Full Changelog: v0.0.0-0.nightly.2025.07.26...v0.0.0-0.nightly.2025.07.29

Nightly build 2025.07.28

What's Changed

Toolchain and implementation changes 🛠️

• Remove location support from error by @jonmeow in #5837
• Factor out an impl declaration helper function by @jonmeow in #5851
• Initial support for interop with class/struct/union fields. by @zygoloid in #5849

Full Changelog: v0.0.0-0.nightly.2025.07.25...v0.0.0-0.nightly.2025.07.28

Nightly build 2025.07.27

What's Changed

Toolchain and implementation changes 🛠️

• Remove location support from error by @jonmeow in #5837
• Factor out an impl declaration helper function by @jonmeow in #5851
• Initial support for interop with class/struct/union fields. by @zygoloid in #5849

Full Changelog: v0.0.0-0.nightly.2025.07.25...v0.0.0-0.nightly.2025.07.27

Nightly build 2025.07.26

What's Changed

Toolchain and implementation changes 🛠️

• Remove location support from error by @jonmeow in #5837
• Factor out an impl declaration helper function by @jonmeow in #5851
• Initial support for interop with class/struct/union fields. by @zygoloid in #5849

Full Changelog: v0.0.0-0.nightly.2025.07.25...v0.0.0-0.nightly.2025.07.26

Nightly build 2025.07.25

What's Changed

Toolchain and implementation changes 🛠️

• Mark VtablePtr always constant by @jonmeow in #5843
• Update/clarify documentation of generic constants by @geoffromer in #5473
• Fix variadic arguments test to use the format that is not deprecated in C++26 and fix the call site to be valid by @bricknerb in #5842
• Make driver fuzzing more robust for clang flags by @jonmeow in #5845
• Change CodeGen to use a diagnostic consumer by @jonmeow in #5847
• Update prelude files to increase destroy dependencies by @jonmeow in #5848

Full Changelog: v0.0.0-0.nightly.2025.07.24...v0.0.0-0.nightly.2025.07.25

Nightly build 2025.07.24

What's Changed

Toolchain and implementation changes 🛠️

• Add comment to FindAssociatedImportIRs by @jonmeow in #5840
• Include the virtual modifier when importing functions by @jonmeow in #5841
• Add support for a custom error type in ErrorOr by @chandlerc in #5834

Full Changelog: v0.0.0-0.nightly.2025.07.23...v0.0.0-0.nightly.2025.07.24

Nightly build 2025.07.23

What's Changed

Toolchain and implementation changes 🛠️

• Interop: support all C++ integer types that map to intN_t or uintN_t. by @zygoloid in #5836
• Fix a crash when Core is poisoned by @jonmeow in #5838
• Allow formatting instructions with a missing name by @jonmeow in #5839

Utilities 📐

• Bump form-data from 4.0.1 to 4.0.4 in /utils/vscode in the npm_and_yarn group across 1 directory by @dependabot[bot] in #5835

Full Changelog: v0.0.0-0.nightly.2025.07.22...v0.0.0-0.nightly.2025.07.23

Nightly build 2025.07.22

What's Changed

Toolchain and implementation changes 🛠️

• Switch inst namer to queue entities when reached by @jonmeow in #5806
• Expand naming for impls and functions by @jonmeow in #5808
• Expand use of CheckIRId stores by @jonmeow in #5820

Full Changelog: v0.0.0-0.nightly.2025.07.20...v0.0.0-0.nightly.2025.07.22

Nightly build 2025.07.21

What's Changed

Toolchain and implementation changes 🛠️

• Use a none prelude instead of needing int.carbon just to name a return type by @danakj in #5819

Full Changelog: v0.0.0-0.nightly.2025.07.19...v0.0.0-0.nightly.2025.07.21