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Thread-Topic: [PHP-DEV] Re: RFC: CachedIterable (rewindable, allows any
 key&repeating keys)
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Date: Sat, 12 Jun 2021 15:20:05 +0000
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Subject: Re: [PHP-DEV] Re: RFC: CachedIterable (rewindable, allows any
 key&repeating keys)
From: tysonandre775@hotmail.com (tyson andre)

Hi internals,=0A=
=0A=
> > > So I'm probably changing this to `ImmutableTraversable` as a short na=
me for the functionality,=0A=
> > > to make it clear arguments are eagerly evaluated when it is created.=
=0A=
> > > (ImmutableSequence may be expected to only contain values, and would =
be confused with the ds PECL's https://www.php.net/manual/en/class.ds-seque=
nce.php)=0A=
> >=0A=
> > Hello,=0A=
> >=0A=
> > And why not simply RewindableIterator ? Isn't it the prominent feature=
=0A=
> > of it ?=0A=
> >=0A=
> > Agreed it's immutable, but a lot of traversable could be as well.=0A=
> =0A=
> All iterators are "rewindable", though of course not in practice. I=0A=
> would avoid such names because we may eventually add an interface=0A=
> which works as a "tag" to say "yes, I actually do support rewinding."=0A=
> =0A=
> The property of being rewindable comes from it being cached. Maybe=0A=
> `CachedAggregate`? Aggregates are data structures from which an=0A=
> external iterator can be obtained, so it makes a bit more sense if=0A=
> it's eager.=0A=
=0A=
I think CachedAggregate would have problems with an unclear meaning similar=
 to those that were raised previously in https://externals.io/message/11481=
9#114798=0A=
(Some developers would think it may refer to the act of lazily evaluating t=
he iterable(caching it on-demand to access later))=0A=
=0A=
https://en.wikipedia.org/wiki/Aggregate on its own refers to a collection o=
f objects/values=0A=
or in other contexts, functions such as count/sum/min/max https://en.wikipe=
dia.org/wiki/Aggregate_function =0A=
=0A=
- In other contexts such as set theory, there might not be keys associated =
with the values=0A=
  so aggregate on its own seems unclear.=0A=
=0A=
ImmutableIteratorAggregate or just ImmutableIterable/ImmutableTraversable m=
akes more sense than `Cached*` to me.=0A=
ImmutableKeyValueSequence is an even shorter name than ImmutableIteratorAgg=
regate and describes what the data structure is.=0A=
=0A=
Thanks,=0A=
Tysosn=0A=