In this area of introspection, Perl is quite good. Each package has a hash that contains all global names ("globs"). If you iterate over the code slots of these globs, you find all code that is connected to a name in that package.

This approach will not find stuff that has been declared lexically, you can't get at it in a convenient way. For that, you have to look at PadWalker, or hit the module author until they make globally accessible what in fact is a variable with (module) global scope.

#!perl -wl
use strict;
use File::Basename;

print "Subroutines in File::Basename";

print $_
    for keys %File::Basename::;

[download]

If you want to make this more parametric, the easiest approach is to switch off strict for the section where you go through the namespace:

use strict;
use File::Basename;

sub dump_keys {
    my($package)= @_;
    print "Subroutines in $package";

    no strict 'refs';
    print $_
        for keys %{"$package\::"};
}

dump_keys('File::Basename');

[download]

I think you can also work your way down the namespace hierarchy by starting at the %:: hash and going to the File:: entry and then to the Basename:: entry, but I find this too much hassle compared to switching off strict for a small block.

In reply to Re: Optree for entire module by Corion
in thread Optree for entire module by wanna_code_perl

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