StoppingAny-class: Stop based on fulfillment of any stopping rule
In 0liver0815/onc-crmpack-test: Object-Oriented Implementation of CRM Designs

This class can be used to combine multiple stopping rules with an OR operator.

stopList contains all stopping rules, which are again objects of class Stopping. Any of these rules must be fulfilled in order that the result of this rule is to stop.

stopList: list of stopping rules

# Define some stopping rules
myStopping1 <- StoppingMinCohorts(nCohorts=3)
myStopping2 <- StoppingTargetProb(target=c(0.2, 0.35),
                                  prob=0.5)
myStopping3 <- StoppingMinPatients(nPatients=20)

# Create a list of stopping rules (of class 'StoppingAny') which will then be
# summarized with the 'any' function, meaning that the study would be stopped if
# 'any' of the single stopping rules is TRUE.
mystopping <- StoppingAny(stopList=c(myStopping1,myStopping2,myStopping3))