Den 2020-10-21 kl. 01:30, skrev Larry Garfield:
On Tue, Oct 20, 2020, at 5:53 PM, tyson andre wrote:
Hi internals,
e.g. `$x = object{key: object{'escaped-literal': $v2 }};`
(equivalent to `$x = (object)['key' => (object)['escaped-literal' => $v2]];`)
For example, in JS, non-string key literals are surrounded in `[]` to
unambiguously reference them.
Here, that could be `object{[$key]: $value, [MY_CONST]: $other}` - but
`(MY_CONST)` would also work
- https://externals.io/message/52990 was mentioned 9 years ago but
would potentially conflict with future block expression RFCs
- `object{key: $value}` is suggested here for similarity to named
arguments
Benefits:
- Shorter and more readable code - casting an array to an object is an
unintuitive and potentially hard to remember
way to create an object literal
- Make it easier for users to use objects for generic associative data
instead of using arrays both for lists and associative data,
in situations where it may result in more usable APIs
For example,
```
$x = new stdClass{};
$x->prop = new stdClass{};
$x->prop->a = $a;
$x->prop->b = $b;
// Could be shortened to
$x = object{prop: object{a: $a, b: $b}}
// $x = (object)['prop' => (object)['a' => $a, 'b' => $b]]
```
This proposal is only for stdClass - there was not much interest in
https://wiki.php.net/rfc/compact-object-property-assignment
and the combination of named properties and constructor property
promotion helps with the readability of other classes.
Thanks,
- Tyson
The only data structure worse than an associative array -- from the point of
view of performance, self-documentation, or usability -- is stdClass. :-) I
can't recall using it in the last decade at least, and my code has been better
for it.
Especially now with constructor promotion and named properties, I'd prefer to
just forget that stdClass exists and encourage others to do so as well.
--Larry Garfield
Well, but for us with a legacy code base where this is heavily used
it would definitely be an improvement! It would enable a so called
stepwise refinement :-)
One typical usecase we have is populating an object with the result
from a DB query or using an object to write to a DB.
I'm also wondering how prevalent this feature is used in different
Open Source libraries.
r//Björn Larsson
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