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Rephrase awkward sentence in rc.md (#906)

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Martin Geisler 2023-07-06 15:03:06 +02:00 committed by GitHub
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src/std/rc.md
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@ -29,7 +29,7 @@ fn main() {
<details>
* `Rc`'s count ensures that its contained value is valid for as long as there are references.
* Like C++'s `std::shared_ptr`.
* `Rc` in Rust is like `std::shared_ptr` in C++.
* `Rc::clone` is cheap: it creates a pointer to the same allocation and increases the reference count. Does not make a deep clone and can generally be ignored when looking for performance issues in code.
* `make_mut` actually clones the inner value if necessary ("clone-on-write") and returns a mutable reference.
* Use `Rc::strong_count` to check the reference count.