On 18.06.2019 at 17:10, Nikita Popov wrote:
> Hi internals,
>
> In PHP 8 it will be possible to add reflectible argument and return type
> information for internal functions (it was previously theoretically
> possible as well, but forbidden by policy for php-src for multiple reasons,
> which have now been resolved).
>
> It will take quite a bit of effort to add this information for hundreds of
> builtin functions. I would like to take this chance to improve the way in
> which arginfo structures are specified, and make it more ergonomic and
> future proof. Here is an example of a typed arginfo structure:
>
> ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_class_alias, 0, 2,
> _IS_BOOL, 0)
> ZEND_ARG_TYPE_INFO(0, user_class_name, IS_STRING, 0)
> ZEND_ARG_TYPE_INFO(0, alias_name, IS_STRING, 0)
> ZEND_ARG_TYPE_INFO(0, autoload, _IS_BOOL, 0)
> ZEND_END_ARG_INFO()
>
> Rather than writing this out by hand, I would like arginfo structures to be
> generated from PHP stub files that contain definitions like this:
>
> function class_alias(string $user_class_name, string $alias_name, bool
> $autoload = true): bool {}
>
> I've created a proof of concept implementation for this at
> https://github.com/php/php-src/pull/4284. Function signatures are specified
> in a xyz.stub.php file from which xyz_arginfo.h is generated. This file can
> then be included in the implementation. Nothing about the arginfo
> implementation itself changes.
>
> What do you think about providing this mechanism?
I like it. Thanks!
Christoph
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