Type Alias Last<T>

Last: T extends readonly []
? never
: T extends readonly [unknown] ? Tuple.Head<T> : Tuple.Last<Tuple.Tail<T>>

Gets the type of the last element of a readonly tuple T. If the tuple is empty, it returns never.

Type Parameters

T extends readonly unknown[]
The readonly tuple type.

Returns

The type of the last element, or never if T is empty.

Example

type L1 = Tuple.Last<[1, 2, 3]>; // 3
type L2 = Tuple.Last<[]>; // never
type L3 = Tuple.Last<[1]>; // 1