OPTION SHORTCIRCUITは使わずに短絡評価したい場合はSelectが便利だよ
select FALSE
case func("条件1")
print "failed at 条件1"
case func("条件2")
print "failed at 条件2"
case func("条件3")
print "failed at 条件3"
default
print "succeed!"
selend
function func(m, r = FALSE)
print m
result = r
fend