Key Features of Rust Playground
- Cargo Compiler Diagnostics Check compiler warnings, type checking, borrow checkers, and lifetimes.
- Monaco Editor Integration Full syntax highlight, bracket matching, and format support.
- Judge0 Sandbox Execution Run Rust code within a secure isolated sandbox container.
Rust Playground Examples
Matching Option Types
Simple match execution on standard Option structure.
Input
fn main() {
let val = Some(10);
match val {
Some(n) => println!("Number: {}", n),
None => println!("Empty"),
}
}Output
Number: 10How to Use Rust Playground
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1. Write Rust Code
Type your Rust program with a fn main() entry point. Use the standard library freely.
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2. Compile and Run
Click Run or press ⌘↵. Your code is sent to the official Rust Playground API.
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3. View Output
Compiler errors, warnings, and println!() output appear in the Output panel.
Common Use Cases for Rust Playground
- Learning Rust Basics Practice match statements, let bindings, structures, enums, and ownership rules.
- Testing Lifetime Rules Observe compiler messages and borrow checker feedback with instant run.
- Prototyping Utilities Verify standard library types like Option, Result, and Vectors.
The Technical Details
The Rust Playground compiles source code using Judge0 running the official rustc compiler toolchain inside secure isolated environments, rendering all outputs client-side asynchronously.
Frequently Asked Questions
Does this use the official Rust Playground?
Yes. Code is executed on play.rust-lang.org, maintained by the Rust team.
Can I use external crates?
A curated set of popular crates (serde, rand, regex, etc.) is available on the Rust Playground.
Is there a time or memory limit?
Yes. The Rust Playground enforces execution time and memory limits.
Is my code private?
Code is submitted to the official Rust Playground API at play.rust-lang.org.