Rust and C++ Interoperability in Chrome

Re:Rust and C++ Interoperability in Chrome by muizelaar on Wednesday August 19, 2020 @02:20PM (#24213962)

Mozilla's uses a combination of https://github.com/eqrion/cbindgen and https://github.com/rust-lang/rust-bindgen depending on the direction of interop. These tools don't provide the safety guarantees of https://github.com/dtolnay/cxx but the also both predate cxx and C++ doesn't have much in terms of safety guarantees to begin with so the bar is pretty low.

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Re:Rust and C++ Interoperability in Chrome by jcranmer on Wednesday August 19, 2020 @02:35PM (#24214234)

It's also worth mentioning that Mozilla tends not to use a lot of standard C++ types, using nsTArray instead of std::vector or nsA?C?String instead of std::string. This makes the porting of APIs using arrays or structs easier, since Mozilla owns the ABI rather than needing to worry about different standard libraries having different ABIs.

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Re:Rust and C++ Interoperability in Chrome by ChrisSD on Wednesday August 19, 2020 @02:51PM (#24214512)

C++ interop with C++ can be a pain. E.g. even with the same version of the same compiler, GCC can have different options enabled that affect the layout of some types.

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Re:Rust and C++ Interoperability in Chrome by ncmncm on Thursday August 20, 2020 @12:14AM (#24219820)

That is the same in all languages mature enough to have variant options. Rust included.

Therefore, a tendentious distraction from the topic. Chris, I shall expect better from you in the future.

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