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Message from discussion A12: Exporation
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Damian Conway  
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 More options Apr 23 2004, 7:52 pm
Newsgroups: perl.perl6.language
From: dam...@conway.org (Damian Conway)
Date: Sat, 24 Apr 2004 09:52:12 +1000
Local: Fri, Apr 23 2004 7:52 pm
Subject: Re: A12: Exporation
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Aaron Sherman wrote:
> At the end of A12, "Exportation" covered the idea that you will now say:

>    sub foo() is export {...}

> Rather than the P5:

>    @EXPORT=qw(foo);
>    sub foo;

> Which is fine, except that in P5 we could say:

>    use Foo qw(foo);
>    @EXPORT=qw(foo);

> Now, I know that the Apoc on modules has not been written, and by that
> time Larry will have thought of this, but I thought I'd point out that
> some mechanism will have to exist in modules to indicate not only that
> they acquire certain subroutines, variables, etc. of other modules, but
> that they re-export them as their own.

My proposal for that issue is just:

        module Bar;

        use Foo «foo»;

        sub foo is export {...}

This works perfectly in Perl 5 under the Perl6::Export module (now on the CPAN):

        package Bar;
        use Perl6::Export;

        use Foo qw(foo);

        sub foo is export;

Damian  


 
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