Millal ja millistes olukordades on soovitatav kasutada tüüpi Option<Void> või sarnaseid konstruktsioone väärtuse puudumise tähistamiseks?

The type Option<Void> or similar constructs (for example, Optional<Void> in Java) are used to explicitly indicate the absence of a value, when a method or function should return either "nothing" or a success signal without a useful result.

It is recommended to use in the following situations:

• When you need to explicitly show that the result may be absent, instead of returning null.
• For methods that can complete successfully or with an error, but do not return data, such as operations with side effects.
• To improve code readability and safety, avoiding null and related errors.

Example in Kotlin:

fun performAction(): Option<Void> {
    return if (success) Option.empty() else Option.of(null) // or another way to indicate absence of value
}

Thus, Option<Void> serves as a semantic indicator of "no value", enhancing the handling of such cases.