Install

Felys offers various installation methods, and it can also be used on websites that support running code online.

Playground

Directly running on a website built with Next and Axum: exec.felys.dev

TIP

To protect the server, each execution is limited to 50 ms, and there is also rate limiting.

Command-line Interface

Similar to tools like python3, it can be used to run a file or enter an interactive interpreter.

First method: download releases on GitHub

Go to GitHub and pick the verison for your OS.

Second method: compile it on your own

A Rust compilation environment and the Cargo package manager are required. You can refer to the book for installation instructions. Personally, I recommend using a package manager like brew to install rustup, and then use the latter to install the Rust toolchain.

Pull the source code, or you can directly download the zip.

git clone https://github.com/felys-lang/felys-cli.git

Compile:

cargo build --release

The target file is located at:

./target/release/felys

Usage

Running felys directly will enter a English interactive environment; to run a specific file, simply include the filename:

felys filename.ely

More Parameters:

• -v: Whether to print relevant runtime information after execution (not effective in the interactive environment)
• -t <TIME>: Timeout setting, can be a decimal with seconds as the unit, default is 0.0, meaning no timeout setting
• -m <MAXC>: Maximum recursion depth setting, default is 100 calls
• -l <LANG>: Choose en or zh as the interactive language, default is en for the English environment

Build it yourself

Customize your own version of Felys through interfaces at the Rust level. For more details, refer to API.

Hello, World!

Once everything is set up, you can run this code to verify:

print("Hello, World!");