package if;

use vars qw($VERSION);
$VERSION = '0.01';

sub work {
    my $method = shift() ? 'import' : 'unimport';
    return unless shift;    # CONDITION
    my $p = shift;          # PACKAGE
    eval "require $p" or die;    # Adds .pm etc if needed
    $p->$method(@_) if $p->can($method);
}

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;

=head1 BUGS

The current implementation does not allow specification of the
required version of the module.

=head1 AUTHOR

Ilya Zakharevich L<mailto:perl-module-if@ilyaz.org>.

=cut