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package Test::Stream::PackageUtil;
use strict;
use warnings;
sub confess { require Carp; goto &Carp::confess }
my @SLOTS = qw/HASH SCALAR ARRAY IO FORMAT CODE/;
my %SLOTS = map {($_ => 1)} @SLOTS;
my %SIGMAP = (
'&' => 'CODE',
'%' => 'HASH',
'$' => 'SCALAR',
'*' => 'IO',
);
sub import {
my $caller = caller;
no strict 'refs';
*{"$caller\::package_sym"} = \&package_sym;
*{"$caller\::package_purge_sym"} = \&package_purge_sym;
1;
}
sub package_sym {
my ($pkg, @parts) = @_;
confess "you must specify a package" unless $pkg;
my ($slot, $name);
if (@parts > 1) {
($slot, $name) = @parts;
}
elsif (@parts) {
my $sig;
($sig, $name) = $parts[0] =~ m/^(\W)?(\w+)$/;
$slot = $SIGMAP{$sig || '&'};
}
confess "you must specify a symbol type" unless $slot;
confess "you must specify a symbol name" unless $name;
confess "'$slot' is not a valid symbol type! Valid: " . join(", ", @SLOTS)
unless $SLOTS{$slot};
no warnings 'once';
no strict 'refs';
return *{"$pkg\::$name"}{$slot};
}
sub package_purge_sym {
my ($pkg, @pairs) = @_;
for(my $i = 0; $i < @pairs; $i += 2) {
my $purge = $pairs[$i];
my $name = $pairs[$i + 1];
confess "'$purge' is not a valid symbol type! Valid: " . join(", ", @SLOTS)
unless $SLOTS{$purge};
no strict 'refs';
local *GLOBCLONE = *{"$pkg\::$name"};
my $stash = \%{"${pkg}\::"};
delete $stash->{$name};
for my $slot (@SLOTS) {
next if $slot eq $purge;
*{"$pkg\::$name"} = *GLOBCLONE{$slot} if defined *GLOBCLONE{$slot};
}
}
}
1;
__END__
=pod
=encoding UTF-8
=head1 NAME
Test::Stream::PackageUtil - Utils for manipulating package symbol tables.
=head1 DESCRIPTION
Collection of utilities L<Test::Stream> and friends use to manipulate package
symbol tables. This is primarily useful when trackign things like C<$TODO>
vars. It is also used for exporting and meta-construction of object methods.
=head1 EXPORTS
Both exports are exported by default, you cannot pick and choose. These work
equally well as functions and class-methods. These will not work as object
methods.
=over 4
=item $ref = package_sym($PACKAGE, $SLOT => $NAME)
Get the reference to a symbol in the package. C<$PACKAGE> should be the package
name. C<$SLOT> should be a valid typeglob slot (Supported slots: HASH SCALAR ARRAY
IO FORMAT CODE). C<$NAME> should be the name of the symbol.
=item package_purge_sym($PACKAGE, $SLOT => $NAME, $SLOT2 => $NAME2, ...)
This is used to remove symbols from a package. The first argument, C<$PACKAGE>,
should be the name of the package. The remaining arguments should be key/value
pairs. The key in each pair should be the typeglob slot to clear (Supported
slots: HASH SCALAR ARRAY IO FORMAT CODE). The value in the pair should be the
name of the symbol to remove.
=back
=head1 SOURCE
The source code repository for Test::More can be found at
F<http://github.com/Test-More/test-more/>.
=head1 MAINTAINER
=over 4
=item Chad Granum E<lt>exodist@cpan.orgE<gt>
=back
=head1 AUTHORS
The following people have all contributed to the Test-More dist (sorted using
VIM's sort function).
=over 4
=item Chad Granum E<lt>exodist@cpan.orgE<gt>
=item Fergal Daly E<lt>fergal@esatclear.ie>E<gt>
=item Mark Fowler E<lt>mark@twoshortplanks.comE<gt>
=item Michael G Schwern E<lt>schwern@pobox.comE<gt>
=item 唐鳳
=back
=head1 COPYRIGHT
There has been a lot of code migration between modules,
here are all the original copyrights together:
=over 4
=item Test::Stream
=item Test::Stream::Tester
Copyright 2014 Chad Granum E<lt>exodist7@gmail.comE<gt>.
This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
See F<http://www.perl.com/perl/misc/Artistic.html>
=item Test::Simple
=item Test::More
=item Test::Builder
Originally authored by Michael G Schwern E<lt>schwern@pobox.comE<gt> with much
inspiration from Joshua Pritikin's Test module and lots of help from Barrie
Slaymaker, Tony Bowden, blackstar.co.uk, chromatic, Fergal Daly and the perl-qa
gang.
Idea by Tony Bowden and Paul Johnson, code by Michael G Schwern
E<lt>schwern@pobox.comE<gt>, wardrobe by Calvin Klein.
Copyright 2001-2008 by Michael G Schwern E<lt>schwern@pobox.comE<gt>.
This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
See F<http://www.perl.com/perl/misc/Artistic.html>
=item Test::use::ok
To the extent possible under law, 唐鳳 has waived all copyright and related
or neighboring rights to L<Test-use-ok>.
This work is published from Taiwan.
L<http://creativecommons.org/publicdomain/zero/1.0>
=item Test::Tester
This module is copyright 2005 Fergal Daly <fergal@esatclear.ie>, some parts
are based on other people's work.
Under the same license as Perl itself
See http://www.perl.com/perl/misc/Artistic.html
=item Test::Builder::Tester
Copyright Mark Fowler E<lt>mark@twoshortplanks.comE<gt> 2002, 2004.
This program is free software; you can redistribute it
and/or modify it under the same terms as Perl itself.
=back
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