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Beginner Joined: 20 Jun 2006 Posts: 24

So I thought I was getting the hang of things, but I attempted to write an alias this evening which fell flat on its face.

My goal is to type:
synch <arbitrary length string>

The result I desire is to have a trigger created:
#TRIGGER <specified string> <teleport to current room>

This basically creates a landmark which will automatically resynchronize my map. This is useful on the MUD I play as fleeing from combat while blind desynchronizes the map and this can be very dangerous for obvious reasons (PK MUD).

The syntax I attempted for a 'synch' alias was:
#CLASS MapSynch
#TRIG %0 {#TELEPORT %roomnum(,)}
#CLASS 0

I'm sure you veterans see the obvious errors here. Any advice to steer my newb butt in the right direction? It's taking the %roomnum(,) literally instead of expanding it to create the trigger. How do I get it to execute and have the RESULT placed in the trigger instead of having the function call itself become part of the new trigger?

Posted: Sat Jan 26, 2008 7:49 am

Try doing it this way:

#ALIAS synch {#CLASS MapSynch;$temp=%-1;#TRIGGER {$temp} {#TELEPORT %roomnum(,)};#CLASS 0}

What's happening is CMUD is taking the %0 in your example and making it the Trigger ID instead of the Trigger itself. I tested mine, and it works.

Charneus

Posted: Sat Jan 26, 2008 8:11 am

You shouldn't be using a comma inside the %roomnum's brackets - that looks like you're specifying both arguments and they're both null, which'll reset the current room's number to nothing. Just have empty brackets to return the current room's number.

If your problem continues after charneus' improvement, use another local variable for the room number:

#ALIAS synch {#CLASS MapSynch;$temp=%-1;$roomnum=%roomnum();#TRIGGER {$temp} {#TELEPORT $roomnum};#CLASS 0}

SubAdmin Joined: 18 Nov 2001 Posts: 5182

Both the above are not quite right because of the expansion rules for creating settings. The script portion of the trigger will be exactly "#TELEPORT %roomnum", which will teleport you to wherever you are at the time the trigger fires. You actually want to have a fixed number there that is set at the time of creation. In order to do this you have to bypass the expansion rules with the #EXECUTE trick.

Posted: Sat Jan 26, 2008 3:06 pm

The script I gave above works absolutely fine - the $roomnum variable is set when the synch alias is run, which is then expanded properly when the trigger's created (try it). Charbal's script, excluding the comma problem, does suffer from that, and it's one of the things I was trying to fix.