Re: Extending SplDoublyLinkedList with specific child types and avoiding strict notices

I don't believe this is possible due to not being able to narrow type hints for arguments in extended classes. However, you could just remove the typehint, and check yourself, something like: public class push($item) { if (!($item instanceof SpecificChildTypeClass::class)) throw new TypeError(sprintf( 'Argument 1 passed to %s::push() must be of the type %s, %s given', static::class, SpecificChildTypeClass::class, gettype($item) != 'object' ? gettype($item) : get_class($item) )); parent::push($item); } On Mon, Mar 20, 2017 at 12:57 PM, AshleySheridan <ash@ashleysheridan.co.uk> wrote: > Hopefully the title says it all. Basically I'm extending the > SplDoublyLinkedList as it's better on memory than arrays, is object > orientated, and it can be extended with additional functionality more > easily. It's that last part that is causing some issues. I'm extending > to create a list class that only takes specific children. This example > will throw PHP strict notices when run, which I ideally want to avoid: > > <?php > class SomeSpecificListClass extends \SplDoublyLinkedList > { > public class push(SpecificChildTypeClass $item) > { > parent::push($item); > } > } > > Has anyone else tried something like this before and found a better > way? > > > Thanks, > Ash > > http://www.ashleysheridan.co.uk > > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > >