An interactive fiction by Juhana Leinonen (2008) - the Inform 7 source text
|Book Testing commands
[locations of the things, for looking at a glance that everything is in proper place in the cell.]
Understand "locations" and "loc" as debug-locating.
Debug-locating is an action out of world.
Carry out debug-locating:
repeat with X running through things enclosed by the cell
say "[X]: [internal position of X][line break]";