FunctorCombo.StrictMemo

Functor-based memo tries (strict for now)

Documentation

class HasTrie k where

Domain types with associated memo tries

Associated Types

type Trie k :: * -> *

Representation of trie with domain type a

Methods

trie :: (k -> v) -> k :->: v

Create the trie for the entire domain of a function

untrie :: (k :->: v) -> k -> v

Convert k trie to k function, i.e., access k field of the trie

enumerate :: (k :->: v) -> [(k, v)]

List the trie elements. Order of keys (:: k) is always the same.

Instances

HasTrie Bool

HasTrie Int

HasTrie Integer

HasTrie ()

(HasTrie a, Functor (Trie a)) => HasTrie [a]

HasTrie a => HasTrie (Id a)

(HasTrie a, Functor (Trie a)) => HasTrie (Tree a)

(HasTrie a, HasTrie (:->: a b)) => HasTrie (a -> b)

(HasTrie a, HasTrie b) => HasTrie (Either a b)

(HasTrie a, Functor (Trie a), HasTrie b) => HasTrie (a, b)

HasTrie x => HasTrie (Const x a)

(HasTrie a, Functor (Trie a), HasTrie b, Functor (Trie b), HasTrie c) => HasTrie (a, b, c)

HasTrie (g (f a)) => HasTrie (:. g f a)

(HasTrie (f a), HasTrie (g a)) => HasTrie (:+: f g a)

(HasTrie (f a), Functor (Trie (f a)), HasTrie (g a)) => HasTrie (:*: f g a)

(HasTrie a, Functor (Trie a), HasTrie b, Functor (Trie b), HasTrie c, Functor (Trie c), HasTrie d) => HasTrie (a, b, c, d)

type :->: k v = Trie k v

Memo trie from k to v

memo :: HasTrie k => Unop (k -> v)

Trie-based function memoizer

memo2 :: (HasTrie s, HasTrie t) => Unop (s -> t -> a)

Memoize a binary function, on its first argument and then on its second. Take care to exploit any partial evaluation.

memo3 :: (HasTrie r, HasTrie s, HasTrie t) => Unop (r -> s -> t -> a)

Memoize a ternary function on successive arguments. Take care to exploit any partial evaluation.