Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:129282
Message-ID:
 <AM8P250MB017008AE323F366958B04B59E2C9A@AM8P250MB0170.EURP250.PROD.OUTLOOK.COM>
Date: Mon, 17 Nov 2025 17:26:53 +0100
User-Agent: Mozilla Thunderbird
Subject: Re: [PHP-DEV] [RFC] Partial Function Application v2
To: Larry Garfield <larry@garfieldtech.com>,
 php internals <internals@lists.php.net>
References: <b2f466e6-b9d8-4aec-a275-e7ae7c4b67ff@app.fastmail.com>
 <2d6318f2-bd79-4aeb-a5b2-9db9367a8f27@app.fastmail.com>
Content-Language: en-US
In-Reply-To: <2d6318f2-bd79-4aeb-a5b2-9db9367a8f27@app.fastmail.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Precedence: list
MIME-Version: 1.0
X-MS-Exchange-MessageSentRepresentingType: 1
X-MS-PublicTrafficType: Email
X-MS-TrafficTypeDiagnostic: AM8P250MB0170:EE_|AS8P250MB0937:EE_
X-MS-Office365-Filtering-Correlation-Id: 1cc8f656-d83e-4fe3-ad97-08de25f61eb4
X-Microsoft-Antispam:
	BCL:0;ARA:14566002|19110799012|8060799015|6090799003|5072599009|15080799012|41001999006|51005399006|23021999003|461199028|1602099012|40105399003|4302099013|3412199025|440099028|10035399007|26104999006;
X-Microsoft-Antispam-Message-Info:
	=?utf-8?B?c1BsK0FiaVRDM1M3aXhnR1ZsU3hXMklzYldQRWJybHg2dm9KbzJmNVcya2JJ?=
 =?utf-8?B?V08remRLZVozdTNPdDdpVll3NVhCYldwRHA4akppdHpIZ1VkdW9QdzdIWW1Y?=
 =?utf-8?B?bHgxVUdaVkZETEdnUThMSXhiUmFiVUlwS2k5dUhjczE0cDFiOGNkNGtyZ1Nu?=
 =?utf-8?B?R1huNE1acWhQaVExU0s3ZVppWGk1L0RKUEpWVXR5aHc2dmxkTmw1eFVqdGpG?=
 =?utf-8?B?eWxBUXRiSFBEL2doUzFUYTdsc0tTMlVndVdqenRpaGpzc3QrbzFtQmJPM1Vl?=
 =?utf-8?B?UmFCbDgwQmp2enZRNFA0cWVOKzFMWlVPdkpXTk54b3lZWVMwc1J1QXZQN3B0?=
 =?utf-8?B?bWtRUnFhQ2NOK0U3TzJUeUJuRFdDTWZ4ak5jNDdRRW1HVXZIU1pwTm91R3Fj?=
 =?utf-8?B?cGVXOGhjQ0kxcFBueXh3MmFhTkZXQUNkd3Jqcm51N255dURJRTEwdEs5OTNv?=
 =?utf-8?B?T2RHcUZGNmxWTXpTSXZMOTJIVjd2NUMwWWJ4dEQyTTF6b0pQdFJYVVQ0bDFy?=
 =?utf-8?B?d1hFb1FwRVlQUEJrbWRZVGdqMFlnWWNRNVk2aks4SHdEclFXVUZ0eTFDSDRS?=
 =?utf-8?B?OFpFaVl4NG9rQVM0U1BNeGRNVzdNUTVqS3BuQ3UyYUE1Sjh5cHJSaVRWb0Ra?=
 =?utf-8?B?dWkxUEJDZk9XbVBTcWNFTkNHRGRBOHF5Y0dDamdzbTdwa3VYOG5DN2J4UWRz?=
 =?utf-8?B?bmZ3aXNkMGtzQmVuRzBDRG1QZnYvakZraWxsTVRsNHZ5S09DYXpIcWhyRkEv?=
 =?utf-8?B?V3NNY3NLUEFFSFdSaGVNVDdXa1VjL2Jpam1YVk05UDdNZzJuNkI0SytCYjlj?=
 =?utf-8?B?TGJOL1dlWDRaMjVvMEZ2cmo2YnRKSzVMZ3ROQ2pFTldyUmdiZ3JjNkZCTXhK?=
 =?utf-8?B?b3lGRWFaVENqYnBiZGtBbEE2WURZSVo4czBLd09kVzRxSmd3Ty9QVWtVbjBJ?=
 =?utf-8?B?M1RlMktmLzU2djhVK3R3WUM2WE13NEJzdzVYQW1aK2pNTzNxT2ZRTDg0VEo5?=
 =?utf-8?B?NmN4VXBpVlZWWW01R05hZEhMdDdXRytKYlBZQzFkbDlIdWxCWUI1N3c2MGJ4?=
 =?utf-8?B?YzlDYmdnSzB5eUhPdEZiWTB4cXBVT0hhYnVYSC9MMlQxZ3AveTZlcmRUVWll?=
 =?utf-8?B?WVo2VTJaSkhaT05IQjZGTjlaZFN5OHYwZHFTUlR1N0xOb2VkMWF5SDdicmNM?=
 =?utf-8?B?ays1bE9ZWnJMUEN0ek5zSVNFaTZGQVI0MG55MXkwanRGdXZuaFlHS2xKUldO?=
 =?utf-8?B?L3IxV2pyRWw5VHlvbnVjOUtWTmlaelZPYjZKeC9pS2tuV003RWRncnp0N2lY?=
 =?utf-8?B?RVY3bGNXb0hmOTA4Q29iUFlnWjA0NkdOdWp2bHJVSlpGK053QXYxcEVGU3E4?=
 =?utf-8?B?NkM4dkN3Yjc4SnBGWXFvRXkzalVjYWVCRVJNbU0vT09PdERJOVhjanNQQ2Qr?=
 =?utf-8?B?WGYrcW1EeWpvbkhweWkxbm1VZ1drSlE4UWtDNFJhRldQK09BNEpyME9kanlL?=
 =?utf-8?B?SXFteUpqeTRWb1NvZXJVblJuVWtQWkNEZzNhNkd3SDVBS3JZUS9xZGtsejgx?=
 =?utf-8?B?NjI0YWVicnQ3V1l1RkdrVnI4WjdSTmM3eWR0Rm94N1kwS1cyNTAvWUppbHFI?=
 =?utf-8?B?K0N5WXg3QjROV05ncEo1bmxsUENWc1VSTmc3dHFyRkZjcGRLQjBWZ2VyQncy?=
 =?utf-8?B?dmY3VitmOWplY1FCTk1hOGlORG9kRmdEKzhjd2FJOUZnNnhpd3VVb3A1T1lS?=
 =?utf-8?B?UkxQVjhCME5VdmZZbFhPVlloZnloQXlTbnl5QitNUnBBbERJc0hTN1ZmNmo3?=
 =?utf-8?B?VFQxL2RrcU0xNzN2MjhYNHJxMXlXT2dHTXRaWEVzN3MveUFyTjY5VkpUOGFr?=
 =?utf-8?B?czl5VGp1aWIrZys0VjYvYWcxRG9SSDc4UFNRR3lSUkN6NGc9PQ==?=
X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1
X-MS-Exchange-AntiSpam-MessageData-0:
	=?utf-8?B?U0FpSFlZa28veWtMY3FBVjZGbkV4Zkc2UTAvbmFsM2FBUTRaWGxTSlVPbFZl?=
 =?utf-8?B?c3ZJUDZ0RFBTMkNLamlpUW51UUF4ZkVleEVXSlNpSEQ1ejlWd1FQN2tXMnB6?=
 =?utf-8?B?ZHdjejBzbndhMmxIVXBWdmVyZGNwMDVscUtmaXBMNmVYN3Ava2kzRm5FU3My?=
 =?utf-8?B?VVBnRnlkNmJMUi91ZExWVTQ5bG9TV255QVczRzFlN0w5UDlSamFMR0NBNFhy?=
 =?utf-8?B?d09MK1A3aXQ3VTFHeVFUeW9sRXRURkwwN0IyVGRrWFVTcnJEaDdmZnpUTlNa?=
 =?utf-8?B?SDFjaUhjOHhNeXN4Nit3MzRMYXpUN3FaVzZUa2lEelMrMVJtdmkyQ05QWlJm?=
 =?utf-8?B?UEEwL2xwS2YrWXFrMDJ2YUs3R1dHU2tRQ01CU05oVzNmM2phSTBnajdNMFNt?=
 =?utf-8?B?NW5OeS9oTFJqeWhUb2RZUWkwNXd6N3JmaGpwaytBRzBXL0NBczlzWHY5Y0xC?=
 =?utf-8?B?MllQNGVidExLMkIyYmRJMDJLOWx0eHJla0dZMUV6dkJkSXQ4ZHRkaGlvWUR2?=
 =?utf-8?B?WXREdGc4S01GVjFnVGN4c2IySE9oQTY2Y3BZdDVPMTJrZDhrcndoMUg1OE5k?=
 =?utf-8?B?SW1BRDNZblF3Z2w3aGJvaXVRT2hMeGdwbHFBN005cTlYWXRDNFVOeUpHZ0JK?=
 =?utf-8?B?Q2RBa09sSmEwcHU5a2I3NHlGVXZ2V1JZMTFWeFdxY0w2SDNGSjEwaGVhemZJ?=
 =?utf-8?B?TGExSmdrRHVoQzhLeTJtT0FVRUJ6S2UrdjkrUlZNTVIyK0c4QndNa1EzaE12?=
 =?utf-8?B?Tkc4RngveDgrNnhHYU82akFZU3NIZTRpL1pRMzR6a0Y1K3FGOFFUV044dGFS?=
 =?utf-8?B?eDNTZ0FjMzE0MnhvTTNlK211M3JwYlN6RXJwMVNFQ1U4QjBEZG9acTNnQ05x?=
 =?utf-8?B?NFNsL2RDUm5LbmxlaUQybllzRzZBWUlxVmhvVVFUbUdJa3hFc25ST01Sd2NM?=
 =?utf-8?B?RkxXZGxWWU03YklQcHZJc0VFR2J2T2RaNHdQNTA0WVE5dVhGNWN5bW9NRy8w?=
 =?utf-8?B?RG84em5MT2o3Q2xkWm5leEtqRVlGaCszZVlIYm1xbDdZZHdmYWsyUnFIVjZT?=
 =?utf-8?B?YlVvMldyQjUzcXVWY1hFdmRvSHI0MkI3dVR2ak5PMXNoT2FJbFJMbWIyZDJs?=
 =?utf-8?B?WnNONUxQUm55QzdBYXBVUkNOMEx4OStHM3hkbFM5QVFxWFM4aGxPcDQ1d3Jh?=
 =?utf-8?B?TUJZaWtpTGRRWXRIeGdtbGc4ZTdUZS9nQjAzc1RjNnExU1FoQVBFUzBVMU1K?=
 =?utf-8?B?R25jTDFEcmZuWUkrSFk5SzcrTlZ5aGU3N0ZieXBueFBiY0tUM1JLb0hLcXRL?=
 =?utf-8?B?UXJ4RjhwaTdrQkoxQW1UUG9ucGpWdmJDSFRqRW8zTlRmTWQ5R3Vvc3Q1VTJY?=
 =?utf-8?B?aDBFZ05jYU1Yam9jaFJOSnovT21ZOXJBNWZab0NSRTdvanpyR1AremZ2U0Vi?=
 =?utf-8?B?THFjOXpoR0hMTGFDVWRsZlZxYk1ZTnI5bGlSbkZVUERzc0ZJMS9KaEpjN09Y?=
 =?utf-8?B?TnR4dkMvODlTbHBhd0doY1ZUME1jZG5oUEZ5MWRoUTJvNnQyd25jYmdseUoy?=
 =?utf-8?B?NzFOOW1EODdZemlXZm91UHJDRE1JRmE1VEhPenprZmhYdURRbnd1L1dSSXpq?=
 =?utf-8?B?NUxXQ3RCbEJieDBwd3BaTXZNRGVqeFR2UEpILzJnMDloVDdVcHBIVzluTkxJ?=
 =?utf-8?B?YUlVclRXbUxrVitrM1NLL1NCUnVaZkpPN0g5Zjk5UjhZd1o1VFN4T1RLdmo1?=
 =?utf-8?Q?knYF1sb8MZlGi9Fahc=3D?=
X-OriginatorOrg: sct-15-20-8534-15-msonline-outlook-5f066.templateTenant
X-MS-Exchange-CrossTenant-Network-Message-Id: 1cc8f656-d83e-4fe3-ad97-08de25f61eb4
X-MS-Exchange-CrossTenant-AuthSource: AM8P250MB0170.EURP250.PROD.OUTLOOK.COM
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Nov 2025 16:26:54.5622
 (UTC)
X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted
X-MS-Exchange-CrossTenant-Id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa
X-MS-Exchange-CrossTenant-RMS-PersistedConsumerOrg:
	00000000-0000-0000-0000-000000000000
X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS8P250MB0937
From: bobwei9@hotmail.com (Bob Weinand)

Hey Larry,

On 16.11.2025 21:51:59, Larry Garfield wrote:
> On Sat, Jun 28, 2025, at 12:06 AM, Larry Garfield wrote:
>> Hi folks.  Arnaud and I would like to present take-2 at Partial
>> Function Application.
>>
>> https://wiki.php.net/rfc/partial_function_application_v2
>>
>> It is largely similar to the previous PFA proposal from 2021, though
>> there are a number of changes.  Most notably:
>>
>> * The implementation is simpler, because FCC already did part of the
>> work.  This RFC can build on it.
>> * Constructors are not supported.
>> * But optional arguments and named placeholders are supported.
>> * It includes pipe-based optimizations.
>>
>> Note: We realize that this is a non-trivial RFC coming late in the
>> cycle.  We are proposing it now because, well, it's ready now.  If the
>> discussion goes smoothly, we're OK calling a vote on it for 8.5,
>> especially as it would complement pipes so well.  If the discussion
>> runs longer, we're also OK with targeting 8.6 instead.  We'll see how
>> that goes.
>>
>> <floor opens for discussion, Larry falls through the trap door>
> It's been just over 2 weeks since the last comment in the thread, and the last change was made (allowing for parameter reordering).  Please consider this the Intent to Vote post; I'll be calling the vote sometime probably late Tuesday or on Wednesday, baring any new issues before then.
>
> --Larry Garfield

I've just gave the RFC another deep read, and found only mentions of 
pass-by-ref. But not return-by-ref, and neither does the implementation 
handle this case:

# ./sapi/cli/php -r 'function &r(&$a) { return $a; } $a = 1; $b = 
&r($a); ++$b; var_dump($a);'
int(2)
# ./sapi/cli/php -r 'function &r(&$a) { return $a; } $a = 1; $b = 
&r(?)($a); ++$b; var_dump($a);'

Notice: Only variables should be assigned by reference in Command line 
code on line 1
int(1)

Was this an oversight or intentionally omitted in the RFC? If it was, 
I'd like to hear the reasoning on this.


Thank you,

Bob