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[PHP-DEV] Proposal for new construct: nameof

Posted by Stan Vassilev | FM 
Stan Vassilev | FM
[PHP-DEV] Proposal for new construct: nameof
October 29, 2008 08:40AM
Hi,

With namespaces and "use" we'll be introducing a new kind of discrepancy between a string reference to a function, and the short "use"-enhanced name for the same function. This becomes very painful, when I want to load a function before I run it.

Today I would do (due to lack of function autoload.. hopefully one day..):

F::loadFunc('Foo_Bar_Baz');
echo Foo_Bar_Baz();

Tommorow I could attempt to do:

use Foo\Bar as B;
F::loadFunc('B\Baz'); <-- failure, strings are not resolved agains the use statements
echo B\Baz();

so it becomes:

use Foo\Bar as B;
F::loadFunc('Foo\Bar\Baz'); <-- works, but negates some of the use for "use"...
echo B\Baz();

I suggest we introduce a new construct which will return a string when passed any identifier to resolve against the current file's use clauses:

nameof Symbol\Name;

With this identifier, the above example can be "normalized" to the following code:

use Foo\Bar as B;
F::loadFunc(nameof B\Baz); <-- will send 'Foo\Bar\Baz' as the argument
echo B\Baz();

NOTE: As a side effect this means less direct writing of string function/class names, and less complaints about \ being the escape characters.

Regards,
Stan Vassilev
Edward Z. Yang
Re: [PHP-DEV] Proposal for new construct: nameof
October 29, 2008 08:55PM
Stan Vassilev | FM wrote:
> I suggest we introduce a new construct which will return a string when passed any identifier to resolve against the current file's use clauses:
>
> nameof Symbol\Name;
>
> With this identifier, the above example can be "normalized" to the following code:

I second this suggestion. One thing that would be awesome is if we could
drop nameof completely (i.e. all class/function names are first class
data) like F::loadFunc(B\Baz), but I doubt it would be possible with the
parser (at the very least, it wouldn't work for items without a
namespace separator, since it could be construed as a constant).

Cheers,
Edward


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Karsten Dambekalns
[PHP-DEV] Re: Proposal for new construct: nameof
October 30, 2008 01:35PM
Hi.

Stan Vassilev | FM wrote:
> I suggest we introduce a new construct which will return a string
> when passed any identifier to resolve against the current file's use
> clauses:
>
> nameof Symbol\Name;
....
> NOTE: As a side effect this means less direct writing of string
> function/class names, and less complaints about \ being the escape
> characters.

Oh, that sounds very good. We do a lot of getComponent($classname)
stuff, that would be awesome in that context.

Regards,
Karsten

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