StoppingAll-class: Stop based on fulfillment of all multiple stopping rules
In 0liver0815/onc-crmpack-test: Object-Oriented Implementation of CRM Designs

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

stopList contains all stopping rules, which are again objects of class Stopping. All stopping 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 'StoppingAll') which would then be
# summarized by the 'all' function, meaning that the study would be stopped only if
# 'all' the single stopping rules are TRUE
mystopping <- StoppingAll(stopList=c(myStopping1,myStopping2,myStopping3))