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In PHP 8.1 the class read-on syntax was added, which allows you to create
classes that are completely closed to changes. In addition, it allows you
to write less boilerplate when declaring a property in the constructor.
Before 8.1:
class A
{
public function __construct(
private readonly int $a,
private readonly int $b,
private readonly int $c,
) { }
}
After 8.1:
readonly class A
{
public function __construct(
private int $a,
private int $b,
private int $c,
) { }
}
But there are also scenarios where, for some reason, not all properties
need to be readonly. For example, when we inherit from a non-readonly class
or when our class has a state for some kind of memoization. In this case,
the class is not readonly, and as a result, you have to write an extra
boiler plate in the constructor. I would like to be able to declare many
readon properties in the constructor in a way similar to readon classes.
I suggest adding the ability to declare a constructor as a readonly. In
this case, all the properties declared in it will be automatically readonly.
class A extends NonReadonlyClass
{
public readonly function __construct(
private int $a,
private int $b,
private int $c,
) { }
}
Yes, it looks a bit strange, but maybe someone will have other suggestions.
Perhaps there is a more competent way to organize this idea.