A LearnerClassif for a classification tree implemented in rpart::rpart() in package rpart. Parameter xval is set to 0 in order to save some computation time.
rpart::rpart()
xval
LearnerClassifRpart
R6::R6Class inheriting from LearnerClassif.
Breiman, L. (1984). Classification and Regression Trees. New York: Routledge. https://doi.org/10.1201/9781315139470