Re: perl use syntax help


"nan li" <nan.li.g@xxxxxxxxx> wrote in message
news:1132472294.652684.116010@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Hello,
> I need some help to understand the following statement:
>
> use Apache::Const -compile => 'OK';
>
> It is from the program at
> http://modperlbook.org/html/ch25_02.html. I don't know what it is doing
> here.
> Thanks a lot.
>
> Nan
>

It allows the constant to be used, but it does not import it into the
current package. It allow the following line to work:
return Apache::OK;

had the line been simply:
use Apache::Const 'OK';

the constant (subroutine) OK would have been imported into the namespace
and:
return OK

would have worked. It is not recommended to import the constants in this
second manner as they may conflict with constants imported from other
modules.




.

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