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feat(typescript-types): Add IsNever<T>

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T. R. Bernstein
2025-07-12 02:43:41 +02:00
parent 5454e903b8
commit afe7bee342
3 changed files with 20 additions and 3 deletions
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11
packages/typescript-types/test/is-never.tst.ts Normal file
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@@ -0,0 +1,11 @@
import type { IsNever } from '@/is-never.js'
import { expect } from 'tstyche'
expect<IsNever<never>>().type.toBe<true>()
expect<IsNever<1>>().type.toBe<false>()
expect<IsNever<'somestring'>>().type.toBe<false>()
expect<IsNever<null>>().type.toBe<false>()
expect<IsNever<undefined>>().type.toBe<false>()
expect<IsNever<unknown>>().type.toBe<false>()
expect<IsNever<any>>().type.toBe<false>()