Levi Morrison wrote on 16/07/2015 16:23:
People have talked about creating types like so:
type Iterable = array | Traversable;
which could then be used as normal:
function foo(Iterable $f);
I kind of like this idea.
Why special case a pseudo-type if we can have a generic
way of making them in user-land?
Well, for the same reason as large amounts of the core library exist
(and PHP's is small compared to some): standardisation and ease of use.
I think "array | Traversable" is a common enough use-case that it
deserves a built-in name, even if a userland naming system is available.
Regards,
--
Rowan Collins
[IMSoP]
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