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Message-ID: <10845a340807220733y11e0396bwb8396cfeb222b005@mail.gmail.com>
Date: Tue, 22 Jul 2008 15:33:18 +0100
Reply-To: RQuadling@GoogleMail.com
To: "Rodrigo Saboya" <rodrigo.saboya@bolsademulher.com>
Cc: internals@lists.php.net
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Subject: Re: [PHP-DEV] Re: Modify language grammar to allow trailing commas in function/method calls
From: rquadling@googlemail.com ("Richard Quadling")

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2008/7/22 Rodrigo Saboya <rodrigo.saboya@bolsademulher.com>

> Evan Priestley escreveu:
>
>> This was floated in 2003 but had weak advocation and didn't seem to come
>> to a decisive resolution:
>>
>>    http://marc.info/?l=php-internals&m=106685833011253&w=2
>>
>> Basically, the proposal is to modify the grammar to allow trailing commas
>> in function and method calls, so this becomes a parseable PHP construct:
>>
>>    f(1, 2, 3,);
>>
>> This patch applies only to function and method calls; it does not apply to
>> function or method definitions. It also does not allow the degenerative case
>> of "f(,)".
>>
>> The real value of relaxing this rule is in nontrivial cases that span
>> across multiple lines:
>>        sprintf(
>>        'long example pattern with %d conversions: %s',
>>        $several,
>>        $conversions
>>    );
>>
>>
> You could just do this:
>
> sprintf(
>    'long example pattern with %d conversions: %s'
>    ,$several
>    ,$conversions
> );
>
> I really don't see a great benefit here, and as you pointed out it would
> make code written with trailing commas incompatible with previous versions
> of PHP.
>
> --
> Rodrigo Saboya
>
>
> --
> PHP Internals - PHP Runtime Development Mailing List
> To unsubscribe, visit: http://www.php.net/unsub.php
>
>
Just thinking of other languages that allow you to skip params simply by
using commas. Whilst this isn't supported in PHP, allowing a trailing comma
and skipped parameters could look quite interesting!

foo(,,,,,,,);


I must admit, I get stung with this in JS when I'm building AJAX option sets
through Prototype for IE (I think like arrays in PHP which allow trailing
,), but I soon learned to do it properly.

I don't see this as a huge advantage.

Regards,

Richard Quadling.
-- 
-----
Richard Quadling
Zend Certified Engineer : http://zend.com/zce.php?c=ZEND002498&r=213474731
"Standing on the shoulders of some very clever giants!"

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