ueval() and streval()

ueval([<object>/]<attribute>/<role>[, <arg0>[, ... , <argN>]])
streval(<string>, <role>[, <arg0>[, ... , <argN>]])

ueval() is u() with a privilege ceiling. The code runs with only what the roles at or below <role>’s priority grant, so a wizard can run code as if they were a player. The ceiling covers you, the object the attribute is on and both owners. It only takes permissions away. It never gives control over an object, and a role above your own changes nothing.

streval() evaluates <string> under the same ceiling. Its arguments are not evaluated; <string> reads them as %0 onwards.

<role> is a role’s name or one of RhostMUSH’s levels: see ueval levels. Any other name is #-1 NO SUCH ROLE. For ueval() only, the level subeval evaluates the attribute’s substitutions and calls no function.

These functions come from RhostMUSH. With no /<role>, ueval() is #-1 NO LEVEL SPECIFIED.

> &CHECK me=[controls(%#, *Alice)]
> think u(CHECK) [ueval(CHECK/wizard)] [ueval(CHECK/citizen)]
1 1 0
> think streval(%0,citizen,[add(1,1)])
[add(1,1)]
> &SHOW me=[add(1,2)] %0
> think ueval(SHOW/sub,x)
[add(1,2)] x

::: seealso

u()
roles :::

Levels

RhostMUSH’s levels can be shortened: citizen, guildmaster, architect, councilor, royalty (a full wizard), wizard, immortal and god. Each level uses the role of the same name when the game has one, as an imported RhostMUSH game does. Otherwise citizen and guildmaster mean player, architect means builder, councilor means royalty, and immortal means every role but not God’s own powers. god evaluates with no ceiling.