/**
* @inheritdoc
* Yet another deviation form description.
* While it keeps the contract, a Functor return, it requires $functor to be a MultipleStaticCreation implementor
* in order to stay true to the Functor Type. Otherwise it substitutes itself, which can be seen as a Group
* of Monads. In a strict language, it would make sense to only allow apply on its own kind, however
* because of PHP's poor typing system, and the implications of having needlessly nested items,
* the result is flattened.
* @return MultipleStaticCreation
*/
public function apply(FunctorInterface $functor)
{
$output = [];
foreach (I($this->hash) as $hof) {
foreach ($functor->map(__CONTRACT__::contentIsACallable($hof)) as $value) {
$output[] = $value;
}
}
return $functor instanceof MultipleStaticCreation ? $functor::from($output) : new static($output);
}
/**
* @covers ::contentIsACallable
* @dataProvider notCallableProvider
*/
public function test_contentIsACallable_exception($notCallable)
{
$this->expectException(invalidContent::class);
contract::contentIsACallable($notCallable);
}
