feat: Add multiple return values support

[nedanwr]

Summary

Add support for functions returning multiple values and unpacking assignments (return a, b and set x, y to call func).

Changes

• Add VAL_TUPLE type to runtime for immutable fixed-size value containers
• Add AST_TUPLE and AST_UNPACK_ASSIGN parser nodes for tuple expressions and unpacking
• Add OP_TUPLE_NEW and OP_UNPACK opcodes for tuple creation and unpacking in VM
• Update LSP with symbol creation, reference finding, and diagnostics for tuples and unpacking
• Add integration tests for multiple return values, unpacking, and variable swapping

Testing

• All existing tests pass
• New tests added (if applicable)
• Examples updated (if applicable)
• Memory leak checks pass (if applicable)

Documentation

• Examples updated (if applicable)
• README/docs updated (if applicable)

Breaking Changes

None

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Review	Updated (UTC)
kronos	Ready	Preview, Comment	Jan 28, 2026 9:25am

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on base/target branches other than the default branch.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

• 🔍 Trigger a full review

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}