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Tuple type containing only unique values
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| type ElementOf<T> = T extends (infer E)[] ? E : never; | |
| type TupleHead<Tuple extends readonly unknown[]> = | |
| Tuple extends [infer HeadElement, ...readonly unknown[]] ? HeadElement : never; | |
| type TupleTail<Tuple extends readonly unknown[]> = | |
| Tuple extends [unknown, ...infer TailElements] ? TailElements : never; | |
| type Unique<Tuple extends readonly unknown[]> | |
| = Tuple extends [] | |
| ? [] | |
| : (TupleHead<Tuple> extends ElementOf<TupleTail<Tuple>> | |
| ? never | |
| : [TupleHead<Tuple>, ...Unique<TupleTail<Tuple>>]) |
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