Make a common `Item` -> `UnsupportedItem` path.

This removes the myriad ways to create an `UnsupportedItem`, and will make it easier to convert an item to "unsupported" for new reasons, as well. (In particular, I want to convert arbitrary items to unsupported in a followup CL if they are filtered out by the features flags checks.)

I was tempted to use a custom type implementing `Display`, rather than just `Rc<str>`, but it's actually an annoying amount of work and doesn't hide the type completely. (You end up with `type DebugName<'a> : Display; fn debug_name<'a>(&'a self, ir: &'a IR) -> Self::DebugName<'a>;` so that the Display impl can hold onto the two references.)

PiperOrigin-RevId: 518732262
4 files changed
tree: 29a0f862827cdb756ae24874ae1f43d36baa8cd6
  1. .bazelci/
  2. bazel/
  3. cc_bindings_from_rs/
  4. common/
  5. docs/
  6. lifetime_analysis/
  7. lifetime_annotations/
  8. migrator/
  9. nullability_verification/
  10. rs_bindings_from_cc/
  11. support/
  12. .bazelrc
  13. .gitignore
  14. BUILD
  15. Cargo.Bazel.lock
  16. CODE_OF_CONDUCT
  17. CONTRIBUTING
  18. LICENSE
  19. README.md
  20. 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