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Date: Thu, 7 Nov 2013 13:45:25 +0100
CC: List PHP Mailing List <internals@lists.php.net>,
 Dmitry Stogov <dmitry@zend.com>
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To: Lars Strojny <lars@strojny.net>
Subject: Re: [PHP-DEV] [RFC] Constant Scalar Expressions (with constants)
From: bobwei9@hotmail.com (Bob Weinand)

Hi Lars,

In what way is this ambiguous?

I just tested; FOO never equals self::FOO. FOO always is a global =
constant, while self::FOO (and Klass::FOO) is the only way to refer to =
the class constant.

const FOO =3D 2;

class Klass
{
  const FOO =3D 1;
  const BAR =3D FOO; // value two, global constant, and if FOO is not =
defined, Klass::Bar =3D=3D=3D "FOO".
}

Bob

Am 7.11.2013 um 13:31 schrieb Lars Strojny <lars@strojny.net>:

> Hi Bob,
>=20
> thanks for your work, it=92s awesome. One thing about constants:
>=20
> Take this example:
>=20
> const FOO =3D 2;
>=20
> class Klass
> {
>   const FOO =3D 1;
>   const BAR =3D FOO;
> }
>=20
> Here FOO is ambiguous, as it could resolve to 2 or to 1. If I =
understood it correctly, global constants are not yet implemented but I =
would suggest to always force prefixing the constant to get rid of the =
ambiguity and allow for future extension.
>=20
> const FOO =3D 2;
>=20
> class Klass
> {
>   const FOO =3D 1;
>   const BAR =3D self::FOO;
> }
>=20
> Does that make sense?
>=20
> cu,
> Lars
>=20
> On 07 Nov 2013, at 13:01, Bob Weinand <bobwei9@hotmail.com> wrote:
>=20
>> Hi!
>>=20
>> As you all know, Anthony Ferrara had withdrawn his RFC a few months =
ago, which was without support for constants in these expressions:
>>=20
>> const foo =3D 10;
>> const bar =3D 10 * foo;
>>=20
>> The use of a constant in a declaration of a constant was not yet =
possible with his patch.
>>=20
>> That's what I changed.
>>=20
>> Enjoy reading the RFC at:
>>=20
>> https://wiki.php.net/rfc/const_scalar_exprs
>>=20
>> Bob Weinand
>>=20
>> Special thanks go to Dmitry who had helped me a lot with feedback and =
a deep review of the patch.
>> --
>> PHP Internals - PHP Runtime Development Mailing List
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