| commit | bcfef620ef71d6ebbacbc56472dd3add00ee46e6 | [log] [tgz] |
|---|---|---|
| author | Googler <no-reply@google.com> | Tue Oct 17 12:13:54 2023 -0700 |
| committer | Copybara-Service <copybara-worker@google.com> | Tue Oct 17 12:14:24 2023 -0700 |
| tree | b0d9d4f5f9654b74687260318c32a4da5bf095e4 | |
| parent | 5753445286b643fdfaa6ebf91a8911acabc411a5 [diff] |
Handle accessors that directly return a pointer member variable
This is to handle the common pattern where the return value of an accessor is tested to see if it is non-null and, if so, the accessor called again to dereference the pointer. For example (`get_const()` is annotated as nullable)
```
if (foo.get_const()) {
foo.get_const()->doThing(); // SAFE
}
```
Additionally, non-const member functions are treated as if they mutate the values of any non-static member variables of pointer type.
```
if (foo.get_const()) {
foo.nonconst_method();
foo.get_const()->doThing(); // UNSAFE
}
PiperOrigin-RevId: 574227988
Change-Id: Ie28fd056d576f0e41f01ffe7cbae198f60fe68e1
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