NoValue type

The absence of a value. This is an enum with no variants, so it is impossible to create a value of type NoValue.

This is useful when you have a function that never returns, such as throw().

You can also encounter NoValue on empty containers. For example, [] has type List<NoValue> and None has type Option<NoValue>.

This is sometimes called 'the bottom type'.

Source Codeenum NoValue {}