{-# LANGUAGE CPP #-} #if !defined(TESTING) && defined(__GLASGOW_HASKELL__) {-# LANGUAGE Safe #-} #endif #include "containers.h" ----------------------------------------------------------------------------- -- | -- Module : Data.IntMap.Lazy -- Copyright : (c) Daan Leijen 2002 -- (c) Andriy Palamarchuk 2008 -- License : BSD-style -- Maintainer : libraries@haskell.org -- Portability : portable -- -- -- = Finite Int Maps (lazy interface) -- -- The @'IntMap' v@ type represents a finite map (sometimes called a dictionary) -- from keys of type @Int@ to values of type @v@. -- -- The functions in "Data.IntMap.Strict" are careful to force values before -- installing them in an 'IntMap'. This is usually more efficient in cases where -- laziness is not essential. The functions in this module do not do so. -- -- For a walkthrough of the most commonly used functions see the -- <https://haskell-containers.readthedocs.io/en/latest/map.html maps introduction>. -- -- This module is intended to be imported qualified, to avoid name clashes with -- Prelude functions: -- -- > import Data.IntMap.Lazy (IntMap) -- > import qualified Data.IntMap.Lazy as IntMap -- -- Note that the implementation is generally /left-biased/. Functions that take -- two maps as arguments and combine them, such as `union` and `intersection`, -- prefer the values in the first argument to those in the second. -- -- -- == Detailed performance information -- -- The amortized running time is given for each operation, with /n/ referring to -- the number of entries in the map and /W/ referring to the number of bits in -- an 'Int' (32 or 64). -- -- Benchmarks comparing "Data.IntMap.Lazy" with other dictionary -- implementations can be found at https://github.com/haskell-perf/dictionaries. -- -- -- == Implementation -- -- The implementation is based on /big-endian patricia trees/. This data -- structure performs especially well on binary operations like 'union' and -- 'intersection'. Additionally, benchmarks show that it is also (much) faster -- on insertions and deletions when compared to a generic size-balanced map -- implementation (see "Data.Map"). -- -- * Chris Okasaki and Andy Gill, \"/Fast Mergeable Integer Maps/\", -- Workshop on ML, September 1998, pages 77-86, -- <http://citeseer.ist.psu.edu/okasaki98fast.html> -- -- * D.R. Morrison, \"/PATRICIA -- Practical Algorithm To Retrieve -- Information Coded In Alphanumeric/\", Journal of the ACM, 15(4), -- October 1968, pages 514-534. -- ----------------------------------------------------------------------------- module Data.IntMap.Lazy ( -- * Map type #if !defined(TESTING) IntMap, Key -- instance Eq,Show #else IntMap(..), Key -- instance Eq,Show #endif -- * Construction , empty , singleton , fromSet -- ** From Unordered Lists , fromList , fromListWith , fromListWithKey -- ** From Ascending Lists , fromAscList , fromAscListWith , fromAscListWithKey , fromDistinctAscList -- * Insertion , insert , insertWith , insertWithKey , insertLookupWithKey -- * Deletion\/Update , delete , adjust , adjustWithKey , update , updateWithKey , updateLookupWithKey , alter , alterF -- * Query -- ** Lookup , IM.lookup , (!?) , (!) , findWithDefault , member , notMember , lookupLT , lookupGT , lookupLE , lookupGE -- ** Size , IM.null , size -- * Combine -- ** Union , union , unionWith , unionWithKey , unions , unionsWith -- ** Difference , difference , (\\) , differenceWith , differenceWithKey -- ** Intersection , intersection , intersectionWith , intersectionWithKey -- ** Universal combining function , mergeWithKey -- * Traversal -- ** Map , IM.map , mapWithKey , traverseWithKey , mapAccum , mapAccumWithKey , mapAccumRWithKey , mapKeys , mapKeysWith , mapKeysMonotonic -- * Folds , IM.foldr , IM.foldl , foldrWithKey , foldlWithKey , foldMapWithKey -- ** Strict folds , foldr' , foldl' , foldrWithKey' , foldlWithKey' -- * Conversion , elems , keys , assocs , keysSet -- ** Lists , toList -- ** Ordered lists , toAscList , toDescList -- * Filter , IM.filter , filterWithKey , restrictKeys , withoutKeys , partition , partitionWithKey , mapMaybe , mapMaybeWithKey , mapEither , mapEitherWithKey , split , splitLookup , splitRoot -- * Submap , isSubmapOf, isSubmapOfBy , isProperSubmapOf, isProperSubmapOfBy -- * Min\/Max , lookupMin , lookupMax , findMin , findMax , deleteMin , deleteMax , deleteFindMin , deleteFindMax , updateMin , updateMax , updateMinWithKey , updateMaxWithKey , minView , maxView , minViewWithKey , maxViewWithKey #ifdef __GLASGOW_HASKELL__ -- * Debugging , showTree , showTreeWith #endif ) where import Data.IntMap.Internal as IM hiding (showTree, showTreeWith) #ifdef __GLASGOW_HASKELL__ import Data.IntMap.Internal.DeprecatedDebug #endif