/usr/share/perl/5.14.2/if.pm is in perl-modules 5.14.2-6ubuntu2.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 | package if;
$VERSION = '0.0601';
sub work {
my $method = shift() ? 'import' : 'unimport';
die "Too few arguments to `use if' (some code returning an empty list in list context?)"
unless @_ >= 2;
return unless shift; # CONDITION
my $p = $_[0]; # PACKAGE
(my $file = "$p.pm") =~ s!::!/!g;
require $file; # Works even if $_[0] is a keyword (like open)
my $m = $p->can($method);
goto &$m if $m;
}
sub import { shift; unshift @_, 1; goto &work }
sub unimport { shift; unshift @_, 0; goto &work }
1;
__END__
=head1 NAME
if - C<use> a Perl module if a condition holds
=head1 SYNOPSIS
use if CONDITION, MODULE => ARGUMENTS;
=head1 DESCRIPTION
The construct
use if CONDITION, MODULE => ARGUMENTS;
has no effect unless C<CONDITION> is true. In this case the effect is
the same as of
use MODULE ARGUMENTS;
Above C<< => >> provides necessary quoting of C<MODULE>. If not used (e.g.,
no ARGUMENTS to give), you'd better quote C<MODULE> yourselves.
=head1 BUGS
The current implementation does not allow specification of the
required version of the module.
=head1 AUTHOR
Ilya Zakharevich L<mailto:ilyaz@cpan.org>.
=cut
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