enum_methods.ko

// Enum methods — calling methods on Option and Result types.
//
// Demonstrates is_some, is_none, unwrap_or on Option,
// and is_ok, is_err, unwrap_or on Result.
//
// Compile and run:
//   kodoc build examples/enum_methods.ko -o enum_methods
//   ./enum_methods

module enum_methods {
    meta {
        purpose: "Demonstrate enum methods on Option and Result"
        version: "0.1.0"
    }

    fn main() -> Int {
        let opt: Option<Int> = Option::Some(42)
        let is_some: Bool = opt.is_some()
        let is_none: Bool = opt.is_none()
        let val: Int = opt.unwrap_or(0)

        let none_opt: Option<Int> = Option::None
        let none_is_some: Bool = none_opt.is_some()
        let none_val: Int = none_opt.unwrap_or(99)

        let ok_res: Result<Int, String> = Result::Ok(10)
        let is_ok: Bool = ok_res.is_ok()
        let is_err: Bool = ok_res.is_err()
        let ok_val: Int = ok_res.unwrap_or(0)

        return 0
    }
}