| commit | 4ce51984b9d1bcf89f2a4201c058b61f3ae3c41b | [log] [tgz] |
|---|---|---|
| author | Jing Lu <lujin@google.com> | Thu Dec 28 05:09:37 2023 -0800 |
| committer | Copybara-Service <copybara-worker@google.com> | Thu Dec 28 05:11:40 2023 -0800 |
| tree | 3148a99ac9e5a4b6e998aaf5a1a170044c87b9d1 | |
| parent | 3a4dff20ddea40fbaeca96fce1b9260dec402557 [diff] |
rs_bindings_from_cc: Use a custom diagnoser when attempting to instantiate a class template specialization. So that the diagnostics (for the fallable attempt of instantiation) doesn't gets reported as true failure, which causes Crubit to exit with error, which in turn causes the compilation to fail. In short, Crubit attempts to instantiate class template specializations more eagerly than header parsing: e.g., `using A = MyTemplate<int>` in a header will cause Crubit to try to instantiate `MyTemplate<int>` while header parsing doesn't attempt to instantiate it. When `MyTemplate<int>` cannot be instantiated, Crubit will error out, while the cc_library target can still be built. PiperOrigin-RevId: 594233384 Change-Id: Ia1d5fd799a85aebc55cf7c2150729afca4fd969e
Crubit is a bidirectional bindings generator 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.
Crubit allows for C++ code and Rust code to call each other without manually wrapping the APIs in an FFI-friendly interop layer. For example, a C++ function like this:
bool IsAbsPath(std::string_view path);
... becomes callable from Rust as if it were defined as:
pub fn IsAbsPath(path: std::string_view) -> bool {...}
Crubit automatically generates ABI-compatible bindings for structs (which can be passed both by value and by reference), functions, and methods, for a large variety of types. (Trivial types, nontrivial types, templated types, etc.)
$ 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
$ 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