Deterministic and probabilistic generators

- type Change a = a -> a
- type T prob a = a -> T prob a
- id :: Num prob => T prob a
- map :: (Num prob, Ord a) => Change a -> T prob a -> T prob a
- unfold :: (Num prob, Ord a) => T prob (T prob a) -> T prob a
- compose :: (Num prob, Ord a) => [T prob a] -> T prob a
- type SpreadC prob a = [Change a] -> T prob a
- apply :: Num prob => Change a -> T prob a
- maybe :: Num prob => prob -> Change a -> T prob a
- lift :: Spread prob a -> SpreadC prob a
- uniform :: Fractional prob => SpreadC prob a
- linear :: Fractional prob => SpreadC prob a
- normal :: Floating prob => SpreadC prob a
- enum :: RealFloat prob => [Int] -> SpreadC prob a
- relative :: RealFloat prob => [prob] -> SpreadC prob a
- type SpreadT prob a = [T prob a] -> T prob a
- liftT :: (Num prob, Ord a) => Spread prob (T prob a) -> SpreadT prob a
- uniformT :: (Fractional prob, Ord a) => SpreadT prob a
- linearT :: (Fractional prob, Ord a) => SpreadT prob a
- normalT :: (Floating prob, Ord a) => SpreadT prob a
- enumT :: (RealFloat prob, Ord a) => [Int] -> SpreadT prob a
- relativeT :: (RealFloat prob, Ord a) => [prob] -> SpreadT prob a

# Transitions

unfold :: (Num prob, Ord a) => T prob (T prob a) -> T prob aSource

unfold a distribution of transitions into one transition

NOTE: The argument transitions must be independent

compose :: (Num prob, Ord a) => [T prob a] -> T prob aSource

Composition of transitions similar to `Numeric.Probability.Monad.compose`

but with intermediate duplicate elimination.

# Spreading changes into transitions

type SpreadC prob a = [Change a] -> T prob aSource

functions to convert a list of changes into a transition

uniform :: Fractional prob => SpreadC prob aSource

linear :: Fractional prob => SpreadC prob aSource

# Spreading transitions into transitions

type SpreadT prob a = [T prob a] -> T prob aSource

functions to convert a list of transitions into a transition

uniformT :: (Fractional prob, Ord a) => SpreadT prob aSource

linearT :: (Fractional prob, Ord a) => SpreadT prob aSource