Aleksey is correct here - a string, which may contain variables to be expanded, is interpreted as a class, and the promise is evaluated if the resulting classname is true.
So if the variable "foo" contains the 3 letters "baz", then ifvarclass => "foo$(foo)" will allow the promise to be executed if the class named "foobaz" is defined. -Dan On Jul 19, 2011, at 2:32 PM, Aleksey Tsalolikhin wrote: > Thanks for the correction, Seva, I certainly don't want to produce > a misunderstanding. > > Reference manual states: > > Cfengine 3 has a new class predicate ifvarclass > which is ANDed with the normal class expression, > and which is evaluated together with the promise. > It may contain variables as long as the resulting > expansion is a legal class expression. > > Most simply, it's a class expression that may contain > variables; whereas normal class expressions may not > contain variables. > > Thanks, > -at > > > > On Tue, Jul 19, 2011 at 10:57 AM, Seva Gluschenko > <seva.glusche...@gmail.com> wrote: >> Aleksey, >> >> your statement sounds very new to me. IMHO, it may produce severe >> misunderstanding. >> >> The "ifvarclass" attribute does NOT allows one to treat a variable as >> a class, it only allows to check whether different classes were >> defined using a variable. >> >> 2011/7/19 Aleksey Tsalolikhin <atsaloli.t...@gmail.com>: >>> Hi, jordy. Also check out "ifvarclass" promise attribute -- it's for >>> using variables as classes. >>> It's recommended to use it with the canonify function. >>> >>> Best, >>> -at >>> _______________________________________________ >>> Help-cfengine mailing list >>> Help-cfengine@cfengine.org >>> https://cfengine.org/mailman/listinfo/help-cfengine >>> >> >> >> >> -- >> SY, Seva Gluschenko. >> > _______________________________________________ > Help-cfengine mailing list > Help-cfengine@cfengine.org > https://cfengine.org/mailman/listinfo/help-cfengine _______________________________________________ Help-cfengine mailing list Help-cfengine@cfengine.org https://cfengine.org/mailman/listinfo/help-cfengine
