Playpen
The Rust Playpen is a way to experiment with Rust code through a web interface. This project is now commonly referred to as Rust Playground.
Using it with mdbook
In mdbook, you can make code examples playable and editable.
fn main() { println!("Hello World!"); }
This allows the reader to both run your code sample, but also modify and tweak it. The key here is the adding the word editable to your codefence block separated by a comma.
```rust,editable
//...place your code here
```
Additionally, you can add ignore if you want mdbook to skip your code when it builds and tests.
```rust,editable,ignore
//...place your code here
```
Using it with docs
You may have noticed in some of the official Rust docs a button that says "Run", which opens the code sample up in a new tab in Rust Playground. This feature is enabled if you use the #[doc] attribute called html_playground_url.