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@lock-evaluation

@lock-evaluation

Section titled “@lock-evaluation”

An evaluation lock is set using this format:

@lock <object>=<attribute>/<value>

The difference between this and an attribute lock is that the is taken from rather than from the person trying to pass the lock. When someone tries, is evaluated, and the result is compared to . If it matches, then the person passes the lock.

Evaluation context

Section titled “Evaluation context”

The person trying to pass the lock is %# and is %! when the evaluation takes place. The evaluation is done with the powers of . If you try to do something (like [get(%#/*<attribute>*)]) and doesn’t have permission to do that, the person will automatically fail to pass the lock.

::: seealso

Evaluation lock example

Section titled “Evaluation lock example”
@lock Thursday Cafe = whichday/Thu
&whichday Thursday Cafe = first(time())

This locks the object “Thursday Cafe” (probably an exit) unless today is Thursday.

Whenever someone tries to pass through the exit, the attribute “whichday” will be evaluated, extracting the first word returned from time() (the day of the week). The result is compared with the value in the lock (“Thu”), and the lock will only be passable when the strings match—Only on Thursdays.

If you have an evaluation lock that just does [hasflag(%#,FLAGNAME)], you should probably use a bit lock instead.

::: seealso