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Chromium exercise solutions (#1564)

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The main thing in this CL is a link to exercise solutions but there are
a couple of other very minor tweaks.
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Adrian Taylor 2023-12-06 19:26:41 +00:00 committed by GitHub
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src/SUMMARY.md
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@ -278,6 +278,7 @@
- [Keeping crates up to date](chromium/adding-third-party-crates/keeping-up-to-date.md) - [Keeping crates up to date](chromium/adding-third-party-crates/keeping-up-to-date.md)
- [Exercise](exercises/chromium/third-party.md) - [Exercise](exercises/chromium/third-party.md)
- [Bringing it together - Exercise](exercises/chromium/bringing-it-together.md) - [Bringing it together - Exercise](exercises/chromium/bringing-it-together.md)
- [Exercise Solutions](exercises/chromium/solutions.md)
# Bare Metal: Morning # Bare Metal: Morning

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src/chromium/interoperability-with-cpp/example-bindings.md
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@ -1,7 +1,7 @@
# Example bindings # Example bindings
CXX requires that the whole C++/Rust boundary is declared in `cxx::bridge` CXX requires that the whole C++/Rust boundary is declared in `cxx::bridge`
"modules" inside `.rs` source code. modules inside `.rs` source code.
```rust,ignore ```rust,ignore
{{#include ../../../third_party/cxx/book/snippets.rs:cxx_overview}} {{#include ../../../third_party/cxx/book/snippets.rs:cxx_overview}}
@ -11,6 +11,10 @@ CXX requires that the whole C++/Rust boundary is declared in `cxx::bridge`
Point out: Point out:
* Although this looks like a regular Rust `mod`, the `#[cxx::bridge]`
procedural macro does complex things to it. The generated code is quite
a bit more sophisticated - though this does still result in a `mod` called
`ffi` in your code.
* Native support for C++'s `std::unique_ptr` in Rust * Native support for C++'s `std::unique_ptr` in Rust
* Native support for Rust slices in C++ * Native support for Rust slices in C++
* Calls from C++ to Rust, and Rust types (in the top part) * Calls from C++ to Rust, and Rust types (in the top part)

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src/chromium/interoperability-with-cpp/using-cxx-in-chromium.md
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@ -33,7 +33,7 @@ compromise the safety of Rust's own data layouts. Presence of _too many_
such a keyword, and is [controversial][1], but strictly, bringing any foreign such a keyword, and is [controversial][1], but strictly, bringing any foreign
code into a Rust binary can cause unexpected behavior from Rust's perspective. code into a Rust binary can cause unexpected behavior from Rust's perspective.
The narrow answer lies in the diagram at the top of this page --- behind the The narrow answer lies in the diagram at the top of [this page][2] --- behind the
scenes, CXX generates Rust `unsafe` and `extern "C"` functions just like scenes, CXX generates Rust `unsafe` and `extern "C"` functions just like
we did manually in the previous section. we did manually in the previous section.
@ -41,3 +41,4 @@ we did manually in the previous section.
[0]: https://source.chromium.org/chromium/chromium/src/+/main:base/containers/span_rust.h;l=21 [0]: https://source.chromium.org/chromium/chromium/src/+/main:base/containers/span_rust.h;l=21
[1]: https://steveklabnik.com/writing/the-cxx-debate [1]: https://steveklabnik.com/writing/the-cxx-debate
[2]: ../interoperability-with-cpp.md

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src/exercises/chromium/solutions.md Normal file
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# Exercise Solutions
Solutions to the Chromium exercises can be found in
[this series of CLs][0].
[0]: https://chromium-review.googlesource.com/c/chromium/src/+/5096560