=for comment
Here we retain Juerd's nice readable curly-brace syntax, and we also
allow for reusable code (by assigning to global output string)
allow for paramaterized tags (by using array ref with prm_table)
allow for multiple-nested tags of any nesting-depth
=cut

### INIT
    ### ----------------------------------------------
    use strict;
    use warnings;
    ### INIT vars; global output string buffer; params for the parent table;
    my  $out;
    my  $set_prm_table   = [qw(red 1 100%)];

    sub prm_table (&@){
        my  $st = $_[1] || "";
        $out .= "<table bgcolor='$st->[0]' border='$st->[1]' width='$st->[2]'>";
        $_[0]->();
        $out .=  "</table>";
        }
    sub row  (&)    { $out .= "\n<tr>"; shift->(); $out .= "</tr>"; }
    sub cell (&)    { $out .= "\n<td>"; shift->(); $out .= "</td>";}

### DISPLAY OUTPUT
    ### ----------------------------------------------
    prm_table {

        for (1 .. 3){
            row {
                cell {$out .= "foo $_"}
            }
        }

    }$set_prm_table;
    print $out;
    print "\n---------------------------\n";