Error Handling

Aura provides a structured way to handle runtime errors using try, catch, finally, and throw.

The try...catch Block

You can wrap code that might throw an error in a try block. If an error occurs, the execution jumps to the catch block.

try {
    // Code that might fail
    let user = fetchUser(123);
    print user.name;
} catch (e: Error) {
    // Handle the error
    print "Error occurred: " + e.message;
}

Throwing Errors

Use the throw keyword to manually trigger an error. You can throw new Error objects or any custom error subclass.

function divide(a: number, b: number): number {
    if (b == 0) {
        throw new Error("Division by zero");
    }
    return a / b;
}

The finally Block

The finally block contains code that will always execute, regardless of whether an error was thrown or caught. This is ideal for cleaning up resources like file handles or network connections.

try {
    openFile();
    processFile();
} catch (e: Error) {
    print "Error processing file";
} finally {
    closeFile(); // This always runs
}