Re: [RFC] Nullable intersection types

> Hi everyone, > > as proposed by Nikita and Joe, I'm submitting this late RFC for your > consideration for inclusion in PHP 8.1. Intersection types as currently > accepted are not nullable. This RFC proposes to make them so. > > I wrote everything down about the reasons why here: > https://wiki.php.net/rfc/nullable_intersection_types > > Please have a look and let me know what you think. > > Have a nice read, > > Nicolas > For the record, I was suggested to add a few more words about reflection in the RFC. In "Proposal", I added this: > On the reflection side, ''ReflectionIntersectionType::allowsNull()'' will return ''true''/''false'' depending on what the intersection type accepts. In "Rationale", I added this: > About reflection, one could imagine a more complex model based on a ''ReflectionIntersectionType'' nested inside a ''ReflectionUnionType''. This RFC proposes to rely on ''ReflectionIntersectionType::allowsNull()'' instead. This is consistent with how ''T|null'' is returned without ''ReflectionUnionType'' wrapper, and is also simpler for userland to deal with.