Safe Haskell | Safe |
---|---|
Language | Haskell98 |
- data Variable w s a
- globalVariable :: (C w, Value w a, C s) => SimpleUpdater w s a -> s (Variable w s a)
- class C w => C w where
- update :: (C w, Value w a, C s) => Updater w s a
- simpleUpdate :: (C w, Value w a, C s) => SimpleUpdater w s a
- updateIfNew :: (C w, C s) => Updater w s a
- updateAndCheck :: (C w, C s) => (a -> a -> Wrap w s ()) -> Updater w s a
- class C t => Fragile t where
- class C w => Value w a where
- data ValueConstraint w a :: *
- valueConstraint :: Value w a => T s (Updates w s) -> T s (Maybe a) -> ValueConstraint w a
- data T w s a
- localVariable :: (C w, Value w a, C s) => T w s (Variable w s a)
- constant :: (C w, Value w a, C s) => a -> T w s (Variable w s a)
- assignment2 :: (C w, C s) => (a -> b) -> Variable w s a -> Variable w s b -> T w s ()
- assignment3 :: (C w, C s) => (a -> b -> c) -> Variable w s a -> Variable w s b -> Variable w s c -> T w s ()
- data Apply w s a
- arg :: Variable w s a -> Apply w s a
- runApply :: (C w, C s) => Apply w s a -> Variable w s a -> T w s ()
- runApplyMaybe :: (C w, C s) => Apply w s (Maybe a) -> Variable w s a -> T w s ()
- solve :: (C w, C s) => T w s a -> w s a
- solveDepthFirst :: (C w, C s) => T w s a -> w s a
- solveBreadthFirst :: (C w, C s) => T w s a -> w s a
- query :: Variable w s a -> s (Maybe a)
Preparation
Handle duplicates
updateIfNew :: (C w, C s) => Updater w s a Source #
class C w => Value w a where Source #
data ValueConstraint w a :: * Source #
valueConstraint :: T s (Updates w s) -> T s (Maybe a) -> ValueConstraint w a Source #
valueConstraint :: Value w a => T s (Updates w s) -> T s (Maybe a) -> ValueConstraint w a Source #
Posing statements
assignment3 :: (C w, C s) => (a -> b -> c) -> Variable w s a -> Variable w s b -> Variable w s c -> T w s () Source #
arg :: Variable w s a -> Apply w s a Source #
This function allows to generalize assignment2
and assignment3
to more arguments.
You could achieve the same with nested applications of assignment3 (,)
.