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Code Editor : InnerPackage.pm

package Devel::InnerPackage;

use strict;
use Exporter 5.57 'import';
use vars qw($VERSION @EXPORT_OK);

use if $] > 5.017, 'deprecate';

$VERSION = '0.4';
@EXPORT_OK = qw(list_packages);

=pod

=head1 NAME

Devel::InnerPackage - find all the inner packages of a package

=head1 SYNOPSIS

use Foo::Bar;
    use Devel::InnerPackage qw(list_packages);

my @inner_packages = list_packages('Foo::Bar');

=head1 DESCRIPTION

Given a file like this

package Foo::Bar;

sub foo {}

package Foo::Bar::Quux;

sub quux {}

package Foo::Bar::Quirka;

sub quirka {}

then

list_packages('Foo::Bar');

will return

Foo::Bar::Quux
    Foo::Bar::Quirka

=head1 METHODS

=head2 list_packages <package name>

Return a list of all inner packages of that package.

=cut

sub list_packages {
            my $pack = shift; $pack .= "::" unless $pack =~ m!::$!;

no strict 'refs';
            my @packs;
            my @stuff = grep !/^(main|)::$/, keys %{$pack};
            for my $cand (grep /::$/, @stuff)
            {
                $cand =~ s!::$!!;
                my @children = list_packages($pack.$cand);
    
                push @packs, "$pack$cand" unless $cand =~ /^::/ ||
                    !__PACKAGE__->_loaded($pack.$cand); # or @children;
                push @packs, @children;
            }
            return grep {$_ !~ /::(::ISA::CACHE|SUPER)/} @packs;
}

### XXX this is an inlining of the Class-Inspector->loaded()
### method, but inlined to remove the dependency.
sub _loaded {
       my ($class, $name) = @_;

no strict 'refs';

# Handle by far the two most common cases
       # This is very fast and handles 99% of cases.
       return 1 if defined ${"${name}::VERSION"};
       return 1 if @{"${name}::ISA"};

# Are there any symbol table entries other than other namespaces
       foreach ( keys %{"${name}::"} ) {
               next if substr($_, -2, 2) eq '::';
               return 1 if defined &{"${name}::$_"};
       }

# No functions, and it doesn't have a version, and isn't anything.
       # As an absolute last resort, check for an entry in %INC
       my $filename = join( '/', split /(?:'|::)/, $name ) . '.pm';
       return 1 if defined $INC{$filename};

'';
}

=head1 AUTHOR

Simon Wistow <simon@thegestalt.org>

=head1 COPYING

Distributed under the same terms as Perl itself.

=head1 BUGS

None known.

=cut

${this.title}

Code Editor : InnerPackage.pm