Results

In Dyon, results are wrapped in ok(x) or err(x). The type is res which defaults to res[any]. The error type is always any.

fn main() {
    a := ok(5)
    if is_ok(a) {
        println(unwrap(a)) // prints `5`
    }
}

Result is used to handle errors explicitly. Dyon has an operator ? to make this easier. You can read more about this in the chapter "Error handling".

Some useful functions

• fn unwrap(any) -> any
• fn unwrap_err(any) -> any
• fn is_ok(res[any]) -> bool
• fn is_err(res[any]) -> bool
• fn ok(any) -> res[any]
• fn err(any) -> res[any]