| Copyright | (c) Luke Palmer 2010 |
|---|---|
| License | BSD3 |
| Maintainer | Luke Palmer <lrpalmer@gmail.com> |
| Stability | experimental |
| Portability | Haskell 2010 |
| Safe Haskell | Safe-Inferred |
| Language | Haskell98 |
Data.IntTrie
Description
Provides a minimal infinite, lazy trie for integral types. It intentionally leaves out ideas such as delete and emptiness so that it can be used lazily, eg. as the target of an infinite foldr. Essentially its purpose is to be an efficient implementation of a function from integral type, given point-at-a-time modifications.
- data IntTrie a
- identity :: (Num a, Bits a) => IntTrie a
- apply :: (Ord b, Num b, Bits b) => IntTrie a -> b -> a
- modify :: (Ord b, Num b, Bits b) => b -> (a -> a) -> IntTrie a -> IntTrie a
- modify' :: (Ord b, Num b, Bits b) => b -> (a -> a) -> IntTrie a -> IntTrie a
- overwrite :: (Ord b, Num b, Bits b) => b -> a -> IntTrie a -> IntTrie a
Documentation
A trie from integers to values of type a.
Semantics: [[IntTrie a]] = Integer -> a
apply :: (Ord b, Num b, Bits b) => IntTrie a -> b -> a Source
Apply the trie to an argument. This is the semantic map.
modify :: (Ord b, Num b, Bits b) => b -> (a -> a) -> IntTrie a -> IntTrie a Source
Modify the function at one point
apply (modify x f t) i | i == x = f (apply t i)
| otherwise = apply t i