2026-08-03 — Last Week in Carbon #7604

geoffromer · 2026-08-03T20:51:25Z

geoffromer
Aug 3, 2026
Maintainer

Decisions
- (none)
New issues
- (none)
Active discussions
- #5896 C++ interop: Using C++ constructors syntax
  - #interop 07-30 (summary) Carbon syntax to map to/from constructors
    - Leaning toward introducing a constructor interface Core.Make.

#interop Can/should we export interfaces to C++?
#contributing-help How to put literal { and } inside a diagnostic string?
#interop Mapping between C++ and Carbon integer types on darwin
#toolchain Interest in using box-drawing characters to pretty-print the parse tree?
#toolchain How to give lowering access to info about destructor triviality?
#interop Migration target for function pointers
PRs:
- Reuse C++ state across compilations in #7567, #7579, #7593, #7594
- Generics and .Self in #7582, #7564, #7584, #7590, #7592
- Class template interop in #7586, #7583, #7588
- Bazel improvements in #7585
- Struct patterns in #7446
- Others in #7573, #7591, #7581
- Miscellaneous reverse-interop support in #7563, #7577, #7578
New contributors:
- @arhwx made their first contribution in #7573

#getting-started extern library and the orphan rule (continued from last week)
#generics-and-templates TODO
#infra Trouble with our binary cache on x86
#7571 #typesystem Interest in numeric range types?
#language-questions Does Carbon have tools for writing tests?
- Not yet.
#getting-started Non-mutating Carbon methods are getting exported as non-const C++ methods
#error-handling ABI issues with multiple return paths
#getting-started How hard is it to get the compiler running?
#proposals-prs-and-process Has there been a proposal or leads issue for Core.Copy?
#contributing-help Is Carbon using formal methods to validate the memory safety approach?
#generics-and-templates Optimizing impl lookup
#generics-and-templates Crash due to symbolic inst in non-generic context
#generics-and-templates Another crash
#syntax What syntax would we use for annotations?
#generics-and-templates TODO
#getting-started Can use Core.PrintChar but not Core.PrintStr.
#language-questions Interest in Exercism track for Carbon?
#infra How to deal with "Warning: Also contains changes from dependent PRs due to non-linear history" on stacked PRs?
#infra clangd-tidy failing presubmit on GitHub
- Fixed in #7598. Affected PRs will need to push a new commit to trigger a re-run with the fix.
#generics-and-templates Are we able to specialize generic functions?
- Closed overloading is planned, but design is still WIP.