2025-08-18 — Last Week in Carbon

[CelineausBerlin]

Updates on leads issues

• Decisions
  • #5930 How should modifiers for keyword operators be spelled?
    • We can use modifiers as separate keywords, e.g. unsafe as, specifically when they make sense as modifiers.
• New issues
  • (none)
• Active discussions
  • (none)

Updates on proposals

• Decisions
  • (none)
• New RFC proposals
  • (none)
• Active discussions
  • #5914 Updating Carbon's safety strategy
    • Review ongoing
  • #5913 Reworking unformed state
    • Review ongoing

Updates on moderation across our community spaces (Discord and GitHub)

• Moderation and conduct teams are still the same size, available in theory from UTC-7 until UTC-5.5: 10 trained members altogether + community lead (hands-off trainer, coach, guide)
  • WIP: Outreach for new interview round of C# community leaders about their community journey
• Activity in the past week:
  • In the last 7 days in our repo: 8 authors pushed 23 commits to trunk, we changed 475 files with 14,425 additions and 6,657 deletions, we merged 23 PRs, opened 8 PRs, we closed 1 issue and opened 1 new one.

Activity on C++ interop

• #interop Draft PR implements primitive interop with RE2. Compiles and links, but fails at runtime.

Other active discussions

These include Discord Chat, GitHub Discussions, or open discussion sessions.

• #language-questions auto as class template argument, vs. CTAD (see also issue #5092).
• #strategy Is it OK for a community member to make an unofficial YouTube channel about Carbon?
• #getting-started Are there any Carbon conference talks planned this year?
  • Yes, there will be one at RustConf.
• #safety What is the ^b syntax that's coming up in safety discussions
  • It's a way of referring to the lifetime of b. Not yet proposed.
• #contributing-help Is there still a list of pending TODOs in the toolchain?
  • Yes, here.
• #safety Trying to clarify the meaning of Send and Sync in Rust.
• #getting-started Is there a roadmap for when Carbon will be in a production state?
  • Not soon. See roadmap.
  • Follow-up discussion of whether memory safety is causing delays.
• #language-questions Is there a way to avoid mangling function names in object files?
  • We're intentionally not using the C/C++ ABI except for interop, so we have to use a non-overlapping mangling.
• #strategy Podcast interview with Chandler about Carbon was finally released.
• #strategy JetBrains is working on a "higher-abstraction programming language".
• #strategy We're now having weekly meetings about safety; see project calendar.
• #strategy Will safe Carbon and unsafe Carbon be different languages?
  • No, not really.
• #language-questions Where is the entry point for the main compiler logic?
  • toolchain/driver/compile_subcommand.cpp.
• #safety Where can we go to learn about Carbon's memory safety story?
  • Proposals #5913 and #5914 are probably the most up to date, but note they're still pending.
• #syntax Do we have a plan for modifier keyword order?
  • We try to have a single order for all modifiers. We already do this in declarations, and the implementation leverages it.
• Discussion topic
  • Any interesting points

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