my $grammar = <<'EOGRAMMAR'; # The quotes are critical! export_line: stock_symbol COMMA # 1 stock_name COMMA2 # 2 stock_code COMMA3 # 3 trade_side COMMA4 # 4 trade_volume COMMA5 # 5 floating_point COMMA6 # 6 tc # 7 { print "got @item\n"; } | EOGRAMMAR