The asExit() macro can be used when we want more than one direction to point to the same destination, but we only want one of the directions to appear in the list of exits (the others effectively being synonyms). In the outsideCave room the cave entrance is described as lying to the south, so that the Player might type either SOUTH or IN to enter it. Here we'll make SOUTH the explicit way in and add handling for IN as a synonym using asExit:
outsideCave : OutdoorRoom 'Parser Valley' 'Parser Valley'
"To the north stretches the broad green Parser Valley under a clear blue sky,
past a small car park lying just off to the east. The main feature of
interest round here is the notorious Eerhtsdat Caves, the entrance to which
lies just to the south, marked by a large blue sign that proclaims, predictably
enough:\b<FONT FACE='TADS-Typewriter' BGCOLOR=BLUE COLOR=WHITE>
ENTRANCE TO THE\nEERHTSDAT CAVES</FONT>\n"
north : FakeConnector { "You start to stride off into the valley, but soon
decide it's not that interesting, so you wander back towards the cave
entrance. " }
south = entranceTunnel
in asExit(south)
east : FakeConnector { "You go and wander round the car park for a few
minutes, but decide you don't want to leave just yet, so you return
to the cave entrance. " }
atmosphereList : ShuffledEventList {
[
'A flight of birds disappears off to the west. ',
{: "\nA <<one of>>small<<or>>large<<at random>>
<<one of>>green<<or>>red<<or>>blue<<or>>black<<or>>white<<at random>> car
pulls out of the car park and drives off to the north. " },
'An aeroplane flies far overhead. ',
nil
]
}
;
Once again, the new properties to be added are shown in bold. Note that we point the south property not to another room, but to the previously defined RoomConnector, entranceTunnel.