# bare return
    push @premiums, get_value( $_ ) for ( @xactions );
    if ( @premiums ) { }

    # return undef
    for ( @xactions ) {
        push @premiums, defined( my $val=get_value($_) ? $val : ();
    }
    if ( @premiums ) { }

    ###

    # bare return
    my %hash;
    $hash{name} = get_name();
    $hash{tag} = get_tag();

    # return undef
    my %hash = (
        name => get_name(),
        tag => get_tag()
    );

    ###

    # bare return
    ( $second, $first ) = ( seconding(), firsting() );
    if ( $first ) { }


    # return undef
    ( $first, $second ) = ( firsting(), seconding() );
    if ( $first ) { }