On Sun, Sep 13, 2009 at 10:45 AM, Jerry D. Hedden <jdhed...@cpan.org> wrote:
>> package Workflow;
>> use Workflow::VERSION;
>> $Workflow::VERSION = $Workflow::VERSION::VERSION;
>
> This sort of strategy caused problems with the CPANPLUS module code
> awhile back in that the 'cpan->r' command showed its submodules to
> have no version numbers.  Not sure if that's all been fixed now, but
> it did illustrate to me that trying to set versions via a version
> module is not a robust scheme.

I suspect that to work correctly with ExtUtils::MM->parse_version (the
canonical way to get a module version without actually loading the
module), it would need to be like this:

    package Workflow;
    use Workflow::VERSION; $Workflow::VERSION=$Workflow::VERSION::VERSION;

parse_version() does an eval() on a single line.  This is why there is
the idiom for version.pm:

    use version; our $VERSION = version->new("v1.2.3");

-- David

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