| commit | 8574c9dd3ee90a7bda138ce094f1b40e0b79bc3e | [log] [tgz] |
|---|---|---|
| author | Lukasz Anforowicz <lukasza@google.com> | Thu Apr 13 15:11:20 2023 -0700 |
| committer | Copybara-Service <copybara-worker@google.com> | Thu Apr 13 15:11:57 2023 -0700 |
| tree | 6302be920fad9132020f7630f90033112c8f1243 | |
| parent | dcf5143a7aa540b24ebc430b386b904416f8bdb2 [diff] |
Add `TypeLocation` parameter to `format_ty_for_cc`. The new parameter replaces the old `format_ret_ty_for_cc` function. A new function (also named `format_ret_ty_for_cc`) has been introduced to deduplicate `format_fn` and `format_thunk_decl`. The refactoring is somewhat desirable on its own (consolidating all C++ type formatting decisions into `format_ty_for_cc`), but the real motivation is the desire to use the new parameter in follow-up CLs to use different formatting for top-level return types (covered in the current CL by the `TypeLocation` enum) and for top-level parameter types (not covered by the current CL). In particular, in future CLs we plan to format Rust references and Rust function pointers as 1) non-nullable C++ references (when used as top-level parameter types or top-level return types) or 2) nullable C++ pointers (in other locations). PiperOrigin-RevId: 524114700
Crubit is an experimental 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