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To: "'Robert Stoll'" <php@tutteli.ch>,
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Date: Sun, 22 Feb 2015 23:05:51 +0100
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Subject: RE: [PHP-DEV] Coercive Scalar Type Hints RFC
From: francois@php.net (=?utf-8?Q?Fran=C3=A7ois_Laupretre?=)

Hi Robert,

> So what does that mean for scalar types?
> IMO it means that way more important than adding scalar type hints to =
PHP
> 7.0 is to agree on a new set of conversion rules for the long run. PHP =
should
> strive to have one consistent set of conversion rules which apply in =
all places
> where implicit or explicit conversion are used.

That's exactly what I mean. I think people should keep in mind, when =
talking about enabling/disabling a given conversion, that the implicit =
scope is every explicit or implicit conversion implemented in PHP.

In an ideal world, we would proceed in reverse order. We wouldn't start =
considering modifying the ZPP ruleset before having aligned every =
implicit/explicit conversions existing in PHP on a single ruleset. =
Unfortunately, if we want to keep a chance with STH in 7.0, we cannot do =
that. So, we will probably evaluate potential BC breaks on ZPP ruleset =
modifications only, meaning we'll make decision without a good =
evaluation of the BC breaks introduced by aligning other PHP conversions =
on the newly-proposed ruleset. So, we'll need to extrapolate from =
ZPP-only results.

Regards

Fran=C3=A7ois