in each of my 258 perl modules i have a line like the follwing, corresponding to the current CVS revision: 

our $CVS_REVISION = q!$Id: Action.pm,v 1.62 02/4/4 03:16:10 matt $!;

[download]

i'm trying to write a debugging routine which iterates over the keys of %INC (ie: to get the list of currently loaded modules), looking for the existence of this very $CVS_REVISION variable. I have been trying to use symbolic references (such as the code below) to achieve this, so far unsuccessfully. can anyone correct me? 

{
    no strict;
    local $^W = undef;

    my @versions = ();
    foreach my $class ( sort keys %INC ) {

        $class =~ s/\.pm$// or next;
        $class =~ s/\//::/g;

        my $version = ${"$class\::CVS_VERSION"} || next;
        push @versions, "$class -> $version";
    }
}

[download]

cheers, matt

In reply to 'reflection', aka traversing symbol tables by d_i_r_t_y

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