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catch

The catch keyword introduces a handler for errors raised in a preceding try block. It binds the thrown error to a name so it can be inspected and handled.

Syntax & Example​

try {
    let n = "abc".parse_int().unwrap();
} catch (e: Error) {
    print(f"caught: {e}");
}

Use Cases​

  • Recovering from expected errors without crashing.
  • Inspecting and logging error details.
  • Translating an error into a fallback value or re-throwing a different one.

See also: try, throw.