rust/comprehensive-rust
1
0
Fork 0
mirror of https://github.com/google/comprehensive-rust.git synced 2025-07-12 09:10:40 +02:00
Code Issues Releases Activity

Update box.md (#363)

Browse Source
This commit is contained in:
Charisee Chiw
2023-02-09 12:55:19 -08:00
committed by GitHub
parent 736de71c7c
commit e3b4b6a5c7
1 changed files with 5 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
src/std/box.md
View File

@ -33,5 +33,7 @@ from `T` directly on a `Box<T>`][2].
* `Box` is like `std::unique_ptr` in C++. * `Box` is like `std::unique_ptr` in C++.
* In the above example, you can even leave out the `*` in the `println!` statement thanks to `Deref`. * In the above example, you can even leave out the `*` in the `println!` statement thanks to `Deref`.
* A `Box` can be useful when you:
* have a type whose size that can't be known at compile time, but the Rust compiler wants to know an exact size.
* want to transfer ownership of a large amount of data. To avoid copying large amounts of data on the stack, instead store the data on the heap in a `Box` so only the pointer is moved.
</details> </details>