| commit | d829163143559aa8461e6f76685638f214dcabef | [log] [tgz] |
|---|---|---|
| author | Lukasz Anforowicz <lukasza@google.com> | Fri Jul 07 11:33:51 2023 -0700 |
| committer | Copybara-Service <copybara-worker@google.com> | Fri Jul 07 11:34:30 2023 -0700 |
| tree | 8441ff978e79f15b47d4b45486031e292469ac2c | |
| parent | aeb861f4d1eabf217107c80fb47e992407dffd4d [diff] |
Fix `offset_of` assertions for fields of types with interior mutability. Implementation of `memoffset::offset_of` (from the `memoffset` crate) ends up taking a reference to a struct. In `const` contexts (such as the context of the assertion) this runs into https://github.com/rust-lang/rust/issues/80384. This CL works around this by opting the generated code into `#![feature(const_refs_to_cell)]`. After this CL bindings generated by `cc_bindings_from_rs` will require a "nightly" version of the Rust compiler. This is unfortunate, but this dependency already exists on `rs_bindings_from_cc` side (e.g. requiring `impl_trait_in_assoc_type` and/or `type_alias_impl_trait` unstable features). This CL unblocks implementing `Drop` support. `Drop` support adds bindings for additional types, some of which run into this bug. PiperOrigin-RevId: 546337289 Change-Id: I1684b30a1ac096cc5115aabbe6e5c6504286947c
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