Inline `Sum` into `format_crate`.

This CL should have no impact on behavior - it just shuffles/refactors
things around (hoping that the end result is "better": the CL removes
more lines of code than it adds - this seems "better";  after the CL
the code is contained in less methods while still being fairly easy to
read - this also seems "better").

This CL is somewhat motivated by reading "A Philosophy of Software
Design" which would probably highlight that the old code:

* Spread related code into various, distant methods
* Did some work unnecessarily (e.g. from `add_assign`
  perspective adding `CcPrerequisites::defs` makes sense, but
  `format_crate` doesn't care about it after `toposort` is done).
* Unnecessarily coupled adding `rs` and `cc` parts of `MixedSnippet`
  (as well as `prereqs` and `tokens` parts of `CcSnippet`).  Removing
  this coupling helps to refactor how namespaces are bound to C++ `tokens`
  in a follow-up CL: unknown commit).

PiperOrigin-RevId: 495879442
1 file changed
tree: d7c8a834e5896218a04b33eb18d7ad5f4d7b9635
  1. .bazelci/
  2. bazel/
  3. cc_bindings_from_rs/
  4. cc_import/
  5. cc_template/
  6. common/
  7. docs/
  8. lifetime_analysis/
  9. lifetime_annotations/
  10. migrator/
  11. nullability_verification/
  12. rs_bindings_from_cc/
  13. .bazelrc
  14. .gitignore
  15. BUILD
  16. Cargo.Bazel.lock
  17. CODE_OF_CONDUCT
  18. CONTRIBUTING
  19. LICENSE
  20. README.md
  21. WORKSPACE
README.md

Crubit: C++/Rust Bidirectional Interop Tool

Build status

Extremely experimental interop tooling for C++ and Rust.

Please don‘t use, this is an experiment and we don’t yet know where will it take us. There will be breaking changes without warning. Unfortunately, we can't take contributions at this point.

Building Crubit

$ apt install clang lld bazel
$ git clone git@github.com:google/crubit.git
$ cd crubit
$ bazel build --linkopt=-fuse-ld=/usr/bin/ld.lld //rs_bindings_from_cc:rs_bindings_from_cc_impl

Using a prebuilt LLVM tree

$ git clone https://github.com/llvm/llvm-project
$ cd llvm-project
$ CC=clang CXX=clang++ cmake -S llvm -B build -DLLVM_ENABLE_PROJECTS='clang' -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=install
$ cmake --build build -j
$ # wait...
$ cmake --install build
$ cd ../crubit
$ LLVM_INSTALL_PATH=../llvm-project/install bazel build //rs_bindings_from_cc:rs_bindings_from_cc_impl