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Date: Mon, 11 Feb 2019 09:34:49 -0700
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To: Chase Peeler <chasepeeler@gmail.com>
Cc: "Woortmann, Enno" <enno.woortmann@web.de>, internals <internals@lists.php.net>
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Subject: Re: [PHP-DEV] Variadic is_*() functions
From: levim@php.net (Levi Morrison)

>> I recognize that there is one downside, which is that lazy evaluation
>> is lost, but generally don't see it to be an issue in these specific
>> cases.
>>
> Lazy evaluation doesn't have to be lost if the all_of and any_of functions are written correctly. all_of will return false as soon as one of them fails, and any_of will return true as soon as one of them passes.
>
> Unless you are talking about cases like this:
> if(is_numeric(reallyFastFunc($foo)) || is_numeric(reallySlowFunc($bar)))
> In that case, you might be able to short circuit the evaluation of reallySlowFunc($bar), which wouldn't be the case with
> if(any_of('is_numeric',reallyFastFunc($foo),reallySlowFunc($bar))){}

Yes, this is what I was referring to. As previously stated, I don't
think it's likely to be an issue. If it is, then as you stated the
normal boolean logic can be used in such places.

-----

In other words, nothing needs to be done in PHP itself. Just write or
use someone else's `all_of`, `any_of`, `none_of`, etc, functions.