Function lateInit

Creates a container that holds a late initialized value.

There are three different types of behaviours for that container:

• mutable will only throw if the value is read before it has been set
• immutable:strict will throw an error if the value is set more than once
• immutable:ignore will simply ignore any set values after the first one

immutable:strict is the default behaviour.

Example

let current: number;

const container = lateInit<number>('mutable');
current = container.value;  // error, not initialized yet
container.value = 0;        // ok, value set to 0
current = container.value;  // ok, current === 0
container.value = 1;        // ok, value set to 1
current = container.value;  // ok, current === 1

const container = lateInit<number>('immutable:strict');
current = container.value;  // error, not initialized yet
container.value = 0;        // ok, value set to 0
current = container.value;  // ok, current === 0
container.value = 1;        // error, once set changes are not allowed
current = container.value;  // ok, current === 0

const container = lateInit<number>('immutable:ignore');
current = container.value;  // error, not initialized yet
container.value = 0;        // ok, value set to 0
current = container.value;  // ok, current === 0
container.value = 1;        // ok, but value is ignored without error!
current = container.value;  // ok, current === 0