Re: [RFC] [DISCUSSION] Scalar Pseudo-type
| From: | Stephen Reay | Date: | Fri, 29 Dec 2017 14:20:14 +0000 |
| Subject: | Re: [RFC] [DISCUSSION] Scalar Pseudo-type | ||
| References: | 1 2 3 4 5 6 7 | Groups: | php.internals |
| Request: | Send a blank email to internals+get-101437@lists.php.net to get a copy of this message | ||
> On 29 Dec 2017, at 19:56, Fleshgrinder <php@fleshgrinder.com> wrote:
>
>> On 12/29/2017 1:26 PM, Rowan Collins wrote:
>> On 29 December 2017 12:08:16 GMT+00:00, Fleshgrinder
>> <php@fleshgrinder.com> wrote:
>>> What is the use case for
int|float? I mean, if f is
>>> able to
>>> process a float than f is able to process an
>>> int and since
>>> int is already automatically changed to a
>>> float, well, you're
>>> done.
>>
>> I think it is somewhat tedious if we discuss every possible pair of
>> types, just as it would be somewhat messy if we added a new keyword
>> for every combination we found a use case for. The beauty of a
>> general-purpose syntax is precisely that a user can use whatever
>> combination they need, and not use combinations they don't need. I'm
>> sure there are plenty of nonsensical or redundant checks that can be
>> expressed in other parts of the language, but that doesn't mean those
>> language constructs are useless or damaging.
>>
>> Regards,
>>
>
> I agree and I do not intend to do so, I actually am not even questioning
> the usefulness of union and intersection types. I am more curious in
> regards to providing a number type. Seems useless to me.
>
> --
> Richard "Fleshgrinder" Fussenegger
>
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>
I'm not sure "number" as a predefined type union is necessary but int|float would
allow a method to accept either in strict mode, and as you said it would also be useful for eg a
formatting function.