A printer callback function is a function can performs the actual
printing. It has a number of subcommands, that are called by
the printer
package, in a form
printer_callback("subcommand", argument1, argument2, ...)
See the examples below.
printer_callback(fun)
The function to use as a printer callback function.
The subcommands:
length
The length of the data to print, the number of items, in natural units. E.g. for a list of objects, it is the number of objects.
min_width
TODO
width
Width of one item, if no
items will be
printed. TODO
print
Argument: no
. Do the actual printing,
print no
items.
done
TODO
Other printer callbacks:
is_printer_callback()