is Neg Number Prompt

/*
  25747 - IsNegativeNumber
  -------
  by andrew jarrett (@ahrjarrett) #hard #number #template literal

  ### Question

  Sometimes when working with numeric literals, we need to rule out (or enforce) that the provided number is a positive integer.

  To do that, we first need a way to tell if the number is negative.

  Write a type-level function `IsNegativeNumber` that accepts a number `N` and returns:

  - `true` if `N` is negative
  - `false` if `N` is positive
  - `false` if `N` is `0`,
  - `never` if `N` is `number`
  - `never` if `N` is a union

  > View on GitHub: https://tsch.js.org/25747
*/

/* _____________ Your Code Here _____________ */

type IsNegativeNumber<T extends number> = any

/* _____________ Test Cases _____________ */
import type { Equal, Expect } from '@type-challenges/utils'

type cases = [
  Expect<Equal<IsNegativeNumber<0>, false>>,
  Expect<Equal<IsNegativeNumber<number>, never>>,
  Expect<Equal<IsNegativeNumber<-1 | -2>, never>>,
  Expect<Equal<IsNegativeNumber<-1>, true>>,
  Expect<Equal<IsNegativeNumber<-1.9>, true>>,
  Expect<Equal<IsNegativeNumber<-100_000_000>, true>>,
  Expect<Equal<IsNegativeNumber<1>, false>>,
  Expect<Equal<IsNegativeNumber<1.9>, false>>,
  Expect<Equal<IsNegativeNumber<100_000_000>, false>>,
]

/* _____________ Further Steps _____________ */
/*
  > Share your solutions: https://tsch.js.org/25747/answer
  > View solutions: https://tsch.js.org/25747/solutions
  > More Challenges: https://tsch.js.org
*/

Code of the type ONLY, no explanations.