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Add speaker notes for rc.md

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Fabian Bornhofen 2023-01-11 14:04:30 +01:00
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src/std/rc.md
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@ -22,3 +22,11 @@ context.
[1]: https://doc.rust-lang.org/std/rc/struct.Rc.html [1]: https://doc.rust-lang.org/std/rc/struct.Rc.html
[2]: https://doc.rust-lang.org/std/cell/index.html [2]: https://doc.rust-lang.org/std/cell/index.html
[3]: ../concurrency/shared_state/arc.md [3]: ../concurrency/shared_state/arc.md
<details>
* Like C++'s `std::shared_ptr`.
* `clone` is cheap: creates a pointer to the same allocation and increases the reference count.
* `make_mut` actually clones the inner value if necessary ("clone-on-write") and returns a mutable reference.
</details>