Function assert

assert<T>(value: unknown, guard: Guard<T>, message?: string): T
Validates a value against a type guard and returns it.

Applies the guard to the value: if it passes, returns the value; otherwise, throws a TypeError. When no custom message is provided, generates a descriptive message from the guard function name (e.g., isString produces "expected string").
Type Parameters
- T
Parameters
- value: unknown
  The value to validate
- guard: Guard<T>
  The type guard function to apply
- Optionalmessage: string
  Optional custom error message; defaults to a message derived from the guard function name
Returns T
The validated value

Throws
When the guard returns false
- Defined in src/basic/error.ts:102