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Date: Wed, 25 Jul 2012 10:43:33 +0800
To: Stas Malyshev <smalyshev@sugarcrm.com>
Cc: PHP Internals <internals@lists.php.net>
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 <500EEA67.8060100@sugarcrm.com>
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Subject: =?utf-8?Q?=E5=9B=9E=E5=A4=8D=EF=BC=9A_?=[PHP-DEV] [RFC]
 Proposal namespace importing with from syntax
From: reeze.xia@gmail.com (Reeze Xia)

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Hi Stas, =20

=E5=9C=A8 2012=E5=B9=B47=E6=9C=8825=E6=97=A5=E6=98=9F=E6=9C=9F=E4=B8=89=EF=
=BC=8C=E4=B8=8A=E5=8D=882:33=EF=BC=8CStas Malyshev =E5=86=99=E9=81=93=EF=BC=
=9A

> Hi=21
> =20
> > from GlobalNamespace=5CSubSpace=5CThirdSace use Class1, Class2 as Ali=
as2, =46orthSpace=5CClass3 as Alias3;
> =20
> I'm not sure it's necessary. If you import a real lot of the classes
> from the same namespace, just import the parent namespace. And this
> =20
> =20

No, we can not import namespace directly for now :
<=3Fphp
namespace A =7B
    class B =7B=7D
=7D

namespace =7B
use A;

var=5Fdump(new B());
=7D

Warning: The use statement with non-compound name 'A' has no effect in /U=
sers/reeze/Opensource/php-test/php-src-master/a.php on line 7

if we wan to archive the goal of import anything. the only way is to decl=
are the current namespace =20
as  =22the parent namespace=22 we want to import from, eg:

<=3Fphp
namespace Zend =7B
    class B =7B=7D
=7D

namespace *Zend* =7B

var=5Fdump(new B());
=7D

but this is not preferred for use code declared as the library we used.
> syntax makes less clear what is the true name of Class2 and also by
> similarity to python syntax would lead people to think it does the same=

> thing python one does - which it is not.
> =20
> =20

Sorry, I didn't make myself clear. the example I posted is not correct. I=
t didn't have to alias the imported classes.
'use' statement can alias the imported class too, the proposed 'from xx u=
se yy' is almost =20
the same as 'use'

The correct example should be:

<=3Fphp
// if we don't want to duplicated then the follow could be
use GlobalNamespace=5CSubSpace=5CThirdSpace=5CClass1;
use GlobalNamespace=5CSubSpace=5CThirdSpace=5CClass2;
use GlobalNamespace=5CSubSpace=5CThirdSpace=5CClass3;
// reduced to
from GlobalNamespace=5CSubSpace=5CThirdSace use Class1, Class2, Class3 ;
=3F>


and if we need alias we could=EF=BC=9A
<=3Fphp
// reduce =20
use GlobalNamespace=5CSubSpace=5CThirdSpace=5CClass1;
use GlobalNamespace=5CSubSpace=5CThirdSpace=5CClass2 as Alias2;
use GlobalNamespace=5CSubSpace=5CThirdSpace=5C=46orthSpace=5CClass3 as Al=
ias3;
// to
from GlobalNamespace=5CSubSpace=5CThirdSace use Class1, Class2 as Alias2,=
 =46orthSpace=5CClass3 as Alias3;
=3F>


Thanks stas.
> =20
> =20
> -- =20
> Stanislav Malyshev, Software Architect
> SugarCRM: http://www.sugarcrm.com/
> (408)454-6900 ext. 227
> =20
> =20



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