Re: RFC - Immutable classes

@Fred Thanks for taking interest. I still need to fully patch reflection extension for this. We had more important discussions in the past two weeks.. Cheers, Silvio 2016-09-09 21:46 GMT+02:00 Fred Emmott <fred@fredemmott.co.uk>: > I see Reflection is still todo; should there be a similar escape hatch to > ReflectionMethod::setAccessible()? > > This would allow things like: > https://gist.github.com/fredemmott/ > 01ad55c0c03c8d7ba62bbd6e9fb23686 (apologies for the hack-like syntax) - > the ‘every property must be a constructor parameter’ approach in the RFC > seems like it would rapidly become unwieldy for classes with a large number > of properties. > > Regards, > - Fred > > > On Aug 8, 2016, at 3:31 AM, Silvio Marijić <marijic.silvio@gmail.com> > wrote: > > > Hi, > > I would need your help with one idea. I'm working on one RFC that I'm would > like to submit. Idea is that after you initialize object eg. after > constructor returns, object would be locked, and you wouldn't be able to > change properties on that object anymore. It would like this: > > <?php > > immutable class Email { > > public $email; > public function __construct($email){ > $this->email = $email; > } > } > $email = new Email("example@email.com"); > > > > > After instance of class is created, object is "frozen" so call like this > > $email->email = "new@email.com"; > > > Would result in error. > > I have already implementation up to certain degree, but I need one advice > from more experienced developers. Where is the place where I could put > logic to lock object after the constructor has finished? Maybe in zend vm > on ZEND_NEW token? > > Some constraints are needed: > > 1. Child class that extends immutable class must be defined as immutable > also. > 2. If property on immutable class contains object, it must be instance > of immutable class. > 3. You can not have immutability per property, it either whole class or > none. > > Thank you all in advance. > > -- > Silvio Marijić > Software Engineer > 2e Systems > > > -- Silvio Marijić Software Engineer 2e Systems