error_action/[2,3]

Under ProXL, if the ProXL error handler is installed, it is possible to select a per-Display action using:

     error_action(+Displayable, -Old, +New)
     error_action(-Old, +New)
     

If Displayable is omitted, the default Display is used.

Old is unified with the previous action for the Display and the new value is set from New.

The available options for error_action are:

user

If the user is installing her own C error handler.

xhandler

If the user wants the X11 default error handler.

continue

If the user wants the ProXL error handler installed in 'continue' mode for the given Display.

trace

If the user wants the ProXL error handler installed in trace mode for the given Display.

debug

If the user wants the ProXL error handler installed in debug mode for the given Display.

abort

If the user wants the ProXL error handler installed in abort mode for the given Display.

exit

If the user wants the ProXL error handler installed in exit mode for the given Display.

menu

If the user wants the ProXL error handler installed and the show menu mode set for the given Display.

default

Same as menu.