module Data.Graph.Class.VertexEnumerable
( VertexEnumerableGraph(..)
, module Data.Graph.Class
) where
import qualified Control.Monad.Trans.State.Strict as Strict
import qualified Control.Monad.Trans.State.Lazy as Lazy
import qualified Control.Monad.Trans.Writer.Strict as Strict
import qualified Control.Monad.Trans.Writer.Lazy as Lazy
import qualified Control.Monad.Trans.RWS.Strict as Strict
import qualified Control.Monad.Trans.RWS.Lazy as Lazy
import Control.Monad.Trans.Identity
import Control.Monad.Trans.Maybe
import Control.Monad.Trans.Error
import Control.Monad.Trans.Class
import Control.Monad.Trans.Reader
import Data.Monoid
import Data.Graph.Class
import Data.Functor.Identity
class Graph g => VertexEnumerableGraph g where
vertices :: g [Vertex g]
instance VertexEnumerableGraph g => VertexEnumerableGraph (Strict.StateT s g) where
vertices = lift vertices
instance VertexEnumerableGraph g => VertexEnumerableGraph (Lazy.StateT s g) where
vertices = lift vertices
instance (VertexEnumerableGraph g, Monoid m) => VertexEnumerableGraph (Strict.WriterT m g) where
vertices = lift vertices
instance (VertexEnumerableGraph g, Monoid m) => VertexEnumerableGraph (Lazy.WriterT m g) where
vertices = lift vertices
instance (VertexEnumerableGraph g, Monoid m) => VertexEnumerableGraph (Strict.RWST r m s g) where
vertices = lift vertices
instance (VertexEnumerableGraph g, Monoid m) => VertexEnumerableGraph (Lazy.RWST r m s g) where
vertices = lift vertices
instance VertexEnumerableGraph g => VertexEnumerableGraph (MaybeT g) where
vertices = lift vertices
instance VertexEnumerableGraph g => VertexEnumerableGraph (IdentityT g) where
vertices = lift vertices
instance (VertexEnumerableGraph g, Error e) => VertexEnumerableGraph (ErrorT e g) where
vertices = lift vertices
instance VertexEnumerableGraph g => VertexEnumerableGraph (ReaderT m g) where
vertices = lift vertices
instance VertexEnumerableGraph Identity where
vertices = Identity []