Eve.Internal.States

Documentation

type States = Map TypeRep StateWrapper

A map of state types to their current value.

class HasStates s where

Represents a state which can itself store more states. states is a lens which points to a given state's States map.

Minimal complete definition

states

Methods

states :: Lens' s States

Instances

HasStates AppState

Methods

states :: Lens' AppState States

class (Typeable s, HasStates s) => HasEvents s

A typeclass to ensure people don't dispatch events to states which shouldn't accept them.

To allow dispatching events in an action over your state simply define the empty instance:

instance HasEvents MyState where

• - Don't need anything here.

Instances

HasEvents AppState

stateLens :: forall a e. (Show a, Typeable a, Default a, HasStates e) => Lens' e a

A polymorphic lens which accesses stored states. It returns the default value (def) if a state has not yet been set.