Re: [RFC] Lazy Objects

From: Date: Thu, 27 Jun 2024 10:47:11 +0000
Subject: Re: [RFC] Lazy Objects
References: 1 2 3 4  Groups: php.internals 
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On Thu, Jun 27, 2024, at 12:32, Marco Pivetta wrote:
> Hey Arnaud,
> 
> On Wed, 26 Jun 2024 at 21:06, Arnaud Le Blanc <[email protected]> wrote:
>> The proposed implementation is adding very little complexity as it's not adding any
>> special case outside of object handlers (except in json_encode() and serialize() because these
>> functions trade abstractions for speed). Furthermore all operations that may trigger an object
>> initialization are already effectful, due to magic methods or hooks (so we are not making pure
>> operations effectful). This means that we do not have to worry about lazy objects or to be aware of
>> them anywhere in the code base, outside of object handlers.
>> 
>> To give you an idea, it's implemented by hooking into the code path that handles
>> accesses to undefined properties. This code path may call __get or __set methods if any, or trigger
>> errors, and with this proposal, may trigger the initialization. Userland implementations achieve
>> this functionality in a very similar way (with unset() and a generated sub-class with magic
>> methods), but they have considerably more edge cases to handle due to being at a different
>> abstraction level.
> 
> Assuming this won't pass a vote (I hope it does, but I want to be optimistic): is this
> something that could be implemented in an extension, or is it only feasible in core?
> 
> Greets,
> 
> Marco Pivetta 
> 
> https://mastodon.social/@ocramius
> 
> https://ocramius.github.io/
>  

I really hope it passes, not just for your libraries but also for mine. I'm looking forward to
going on a deletion spree and having a nice standardized proxy API.

— Rob


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