Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:35559
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Received-SPF: error (pb1.pair.com: domain geminisbs.com from 72.52.154.20 cause and error)
Message-ID: <47B9B1B9.7060601@geminisbs.com>
Date: Mon, 18 Feb 2008 11:26:33 -0500
User-Agent: Thunderbird 2.0.0.6 (X11/20071022)
MIME-Version: 1.0
To: KOYAMA Tetsuji <koyama@hoge.org>
CC: internals@lists.php.net
References: <cfac20c70801100209g58094bdfpd09fec6eac28abdb@mail.gmail.com> <bac8aeab0801291026r40a6b304ud0afba0c47113a37@mail.gmail.com>
In-Reply-To: <bac8aeab0801291026r40a6b304ud0afba0c47113a37@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Subject: Re: [PHP-DEV] [RFC] Anonymous functions
From: marye@geminisbs.com (Matvey Arye)

Hi All,

I second this. Can we please re-open the discussion on anonymous 
functions as well as closures. That would be an awesome feature. 
create_function is a bit ugly semantically to be sufficient for all 
anonymous function needs.

Thanks,
Mat

KOYAMA Tetsuji wrote:
> Hi lists,
>
> Is this discussion stopping?
>
> I want this feature in PHP. Please start to talk.
>
> On Jan 10, 2008 7:09 PM, Ryusuke SEKIYAMA <rsky0711@gmail.com> wrote:
>   
>> Hello, lists,
>>
>> We have discussed about implementing anonymous functions and
>> closures in PHP.
>> However, I consider that implementing anonymous functions and
>> implementing lexical scopes should be discussed separately.
>> # Even though I like closure. ;-)
>> So I wrote anonymous function patch for PHP 5.3 and 6.0.
>>
>>
>> Patches (inlcude tests):
>> for PHP 5.3: http://www.opendogs.org/pub/php-5.3dev-080109-anon.patch
>> for PHP 6.0: http://www.opendogs.org/pub/php-6.0dev-080109-anon.patch
>>
>>
>> Featues:
>> - Unlike create_function(), there is no need to take care of
>>  quotes, backslashes and dollars .
>> - Can be used in loop, but be compiled only once.
>> - Supports recursive call using __FUNCTION__.
>> - Supports inline execution. It works like a block scope.
>> - Works with opcode caches.
>>  Since I couldn't build APC against PHP 5.3, I have tested
>>  PHP 5.2.5 + anonymous function patch and APC 3.0.16.
>>
>>
>> Example:
>> <?php
>> // callback
>> $arr = array(5, 3, 6, 0);
>> usort($arr, function($a, $b){ return $a - $b; });
>> print_r($arr); // 0, 3, 5, 6
>>
>> // assign to a variable
>> $lambda = function(){
>>  echo "Hello, World!\n";
>> };
>> $lambda(); // "Hello, World!"
>>
>> // inline execution
>> $result = function($a, $b){
>>  return $a + $b;
>> }(1, 2);
>> var_dump($result); // "int(3)"
>> ?>
>>
>>
>> The anonymous function name is composed of '\0', "ZEND_ANON<#serial>",
>> filename and character position.
>> - Leading '\0' blocks to be displayed by get_defined_functions().
>> - "ZEND_ANON<" helps determine wheter the function is anonymous or not
>>  because '<' cannot be used for user-defined function name.
>> - Serial number and file informations make the name unique.
>> - char anon_key_buf[32] is long enough because
>>  `snprintf(anon_key_buf, 32, "ZEND_ANON<%llu>", (unsigned long
>> long)UINT64_MAX)'
>>  returns 31.
>>
>>
>> Regards,
>>
>>
>> 2008/1/6, Marcus Boerger <helly@php.net>:
>>     
>>> Hello Stanislav,
>>>
>>>   tha makesw three then already, how about we ask around again?
>>> Ryusuke, can you please start a new '[RFC] Square brackets shortcut' thread
>>> to collect opinions and pass along the patch for that?
>>>
>>> I like the anonymous function patch too. It is clean and simple. Maybe you
>>> want to start a second '[RFC] Anonymous functions' thread with that patch.
>>>
>>> Can you also please add tests for both?
>>>
>>> marcus
>>>
>>> Wednesday, January 2, 2008, 7:51:06 PM, you wrote:
>>>
>>>       
>>>>> the square bracket array syntax patch for PHP 5.3,
>>>>>   http://www.opendogs.org/pub/php-5.3dev-080101-sbar.patch
>>>>>           
>>>> I remember we discussed that already and it was rejected then (even
>>>> though myself and Andi liked it) - did the people that objected then
>>>> change their minds?
>>>>         
>>>
>>> Best regards,
>>>  Marcus
>>>
>>>
>>>       
>> --
>> /**
>>  * Ryusuke SEKIYAMA
>>  * rsky0711@gmail.com
>>  */
>>
>> --
>> PHP Internals - PHP Runtime Development Mailing List
>> To unsubscribe, visit: http://www.php.net/unsub.php
>>
>>
>>     
>
> -
> KOYAMA, Tetsuji
> koyama@hoge.org
>
>