Function narrowOrCrash

narrowOrCrash<T, U>(guard, errorFactory): ((x) => Opt<U>)
Type Parameters
- T
- U
Parameters
- guard: ((value) => value is U)
  - - (value): value is U
    - Parameters
      value: any
      Returns value is U
- errorFactory: (() => unknown)
  - - (): unknown
    - Returns unknown
Returns ((x) => Opt<U>)
- - (x): Opt<U>
  - Parameters
    - x: Opt<T>
    Returns Opt<U>
See
Opt.narrowOrCrash
- Defined in Opt.ts:2684
narrowOrCrash<T, U>(guard, crashMessage?): ((x) => Opt<U>)
Type Parameters
- T
- U
Parameters
- guard: ((value) => value is U)
  - - (value): value is U
    - Parameters
      value: any
      Returns value is U
- Optional crashMessage: string
Returns ((x) => Opt<U>)
- - (x): Opt<U>
  - Parameters
    - x: Opt<T>
    Returns Opt<U>
- Defined in Opt.ts:2685

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