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Date: Thu, 12 Feb 2015 14:43:22 +0100
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Subject: Re: [PHP-DEV][RFC][VOTE] Group Use Declarations
From: ivan.enderlin@hoa-project.net ("Ivan Enderlin @ Hoa")

On 12/02/15 14:21, Marcio Almada wrote:
>> Thanks for the RFC!
>> We discussed a little bit with the Hoa [1]'s and fruux [2]'s community
> and we have a question.
>> Why not pretending we have an array of symbols, something like:
>>     use Foo\Bar\[Baz, Qux];
>> instead of
>>     use Foo\Bar\{Baz, Qux};
>> This is a list vs. block debate. While I personally would go for `{` and
> `}`, here we declare a list, so we guess the array syntax
>> would be more tailored.
>> Thoughts?
> Hi,
Hi :-),


> This is an interesting one. During research, the `[` and `]` syntax was
> considered for a while but it quickly felt apart for the following reasons:
>
> 1. Most people considered on PHP the array construct is a very important
> building block and therefore we should avoid to multiplex or reuse its
> syntax in multiple contexts. This becomes more clear in cases involving
> conflict resolutions:
>
> use Foo\Bar\[Baz *as* Buz, Qux\Quaz *as* Quiz];
+1.


> 2. Block syntax seemed more versatile and prone to reuse because we already
> have the traits conflict resolution syntax:
>
> http://php.net/manual/en/language.oop5.traits.php#language.oop5.traits.conflict
>
> The reasoning for using commas to delimit imported entities and not `;` is
> that current use declaration syntax is a comma separated list:
>
> use function foo\math\sin, foo\math\cos, foo\math\cosh;
>
> Hence the `{..., ...}` syntax seemed the most tailored to feel similar and
> obvious for most of the current PHP userbase, based on all experiments:
>
> use function foo\math\{ sin, cos, cosh };
> use function Foo\Bar\{ A, B as Baz, C };
>
> I hope that the given information is useful to your decision process. Good
> voting!
Yup sure. We are going to vote yes (behind my nickname).
However, while I agree with all your arguments, we have more syntax and 
more semantics, it's kind of confusing :-/. But it's a small one, so +1 
for us.

-- 
Ivan Enderlin
Developer of Hoa
http://hoa-project.net/

PhD. computer scientist
Hacker
http://mnt.io/