Package transformers

Modules:

Control.Monad.IO.Class Control.Monad.Trans.Class Control.Monad.Trans.Cont Control.Monad.Trans.Except Control.Monad.Trans.Maybe Control.Monad.Trans.Reader Control.Monad.Trans.State Control.Monad.Trans.Writer

Explanations of the icons used in the documentation:

Deterministic   Operation is deterministic, i.e., defined by exclusive rules and depend only on deterministic operations
Non-deterministic   Operation might be non-deterministic, i.e., it is defined by overlapping rules or depend on non-deterministic operations