isOrCrash ()

isOrCrash<T>(guard, message?): ((x) => T)
Verify the given value passes the guard. If not, throw an exception.
Type Parameters
- T
Parameters
- guard: ((x) => x is T)
  - - (x): x is T
    - Parameters
      x: unknown
      Returns x is T
- Optional message: string
Returns ((x) => T)
- - (x): T
  - Parameters
    - x: unknown
    Returns T
Example
```
const a = isOrCrash(isNumber)(4 as unknown); // a is of type number, doesn't throw
const b: number = a; // ok
```
- Defined in Opt.ts:3332
isOrCrash<T>(guard, errorFactory): ((x) => T)
Type Parameters
- T
Parameters
- guard: ((x) => x is T)
  - - (x): x is T
    - Parameters
      x: unknown
      Returns x is T
- errorFactory: (() => unknown)
  - - (): unknown
    - Returns unknown
Returns ((x) => T)
- - (x): T
  - Parameters
    - x: unknown
    Returns T
- Defined in Opt.ts:3333