Function invert

src/index.ts:169–179

(
  needle: {},
  iterable: ParseGenerator<Result>,
)

////////

export function invert<Result = void>(
  needle: {},
  iterable: ParseGenerator<Result>,
): string | null {
  const result =  invertInner(needle, iterable);
  if (result !== null && result.type === 'done') {
    return result.components.join('');
  }

  return null;
}

function invertInner<Result = void>(
  needle: {},