a634a9d...main · typeable/refined-containers

git.iko.soy/typeable/refined-containers

14 files changed+1755−105

since splitsnapshots

unifiedsplit

.github/workflows/ci.yaml+7−6 refined-containers.cabal+3−2 src/Data/HashMap/Common/Refined.hs+108−16 src/Data/HashMap/Refined.hs+226−9 src/Data/HashMap/Strict/Refined.hs+227−10 src/Data/HashSet/Refined.hs+1−1 src/Data/IntMap/Common/Refined.hs+134−15 src/Data/IntMap/Refined.hs+225−7 src/Data/IntMap/Strict/Refined.hs+229−9 src/Data/IntSet/Refined.hs+1−1 src/Data/Map/Common/Refined.hs+141−15 src/Data/Map/Refined.hs+226−7 src/Data/Map/Strict/Refined.hs+226−6 src/Data/Set/Refined.hs+1−1

.github/workflows/ci.yaml+7−6

@@ -27,18 +27,19 @@ jobs:

2727 - "9.6.6"

2828 - "9.8.2"

2929 - "9.10.1"

30+ - "9.12.1"

3031 fail-fast: false

3132 name: Build on Linux, GHC ${{ matrix.ghc_version }}

3233 runs-on: ${{ matrix.platform }}

3334 steps:

34− - uses: actions/checkout@v3

35− - uses: haskell/actions/setup@v2

35+ - uses: actions/checkout@v4

36+ - uses: haskell-actions/setup@v2

3637 id: setup-haskell

3738 with:

3839 ghc-version: ${{ matrix.ghc_version }}

3940 cabal-version: "3.10.1.0"

4041 - name: Cache

41− uses: actions/cache@v3

42+ uses: actions/cache@v4

4243 with:

4344 path: ${{ steps.setup-haskell.outputs.cabal-store }}

4445 key: ${{ runner.os }}-stack-${{ matrix.ghc_version }}

@@ -57,15 +58,15 @@ jobs:

5758 name: Build source tarball

5859 if: github.event_name == 'release'

5960 steps:

60− - uses: actions/checkout@v3

61− - uses: haskell/actions/setup@v2

61+ - uses: actions/checkout@v4

62+ - uses: haskell-actions/setup@v2

6263 with:

6364 cabal-version: "3.10.1.0"

6465 - name: cabal sdist

6566 run: |

6667 cabal sdist --output-dir "$GITHUB_WORKSPACE/sdist"

6768 echo "dist=$(find "$GITHUB_WORKSPACE/sdist" -maxdepth 1 -type f -name '*.tar.gz')" >> "$GITHUB_ENV"

68− - uses: actions/upload-artifact@v2

69+ - uses: actions/upload-artifact@v4

6970 with:

7071 name: Source tarball

7172 path: ${{ env.dist }}

refined-containers.cabal+3−2

@@ -23,10 +23,11 @@ license: MIT

2323license-file: LICENSE

2424author: mniip@typeable.io

2525maintainer: mniip@typeable.io

26−version: 0.1.0.2

26+version: 0.1.2.0

2727build-type: Simple

2828

2929tested-with:

30+ , GHC == 9.12.1

3031 , GHC == 9.10.1

3132 , GHC == 9.8.2

3233 , GHC == 9.6.6

@@ -42,7 +43,7 @@ source-repository head

4243

4344library

4445 build-depends:

45− , base >= 4.12 && < 4.21

46+ , base >= 4.12 && < 4.22

4647 , adjunctions >= 4.4 && < 4.5

4748 , constraints >= 0.11 && < 0.15

4849 , containers >= 0.5.7 && < 0.8

src/Data/HashMap/Common/Refined.hs+108−16

@@ -4,6 +4,7 @@ module Data.HashMap.Common.Refined where

55import Control.Monad.Reader

66import Control.DeepSeq

7+import Data.Bifoldable

78import Data.Coerce

89import Data.Constraint (Dict(..))

910import Data.Container.Refined.Hashable

@@ -11,6 +12,7 @@ import Data.Container.Refined.Proofs

1112import Data.Container.Refined.Unsafe

1213import Data.Distributive

1314import Data.Foldable.WithIndex

15+import Data.Functor.Classes

1416import Data.Functor.Rep

1517import Data.Functor.WithIndex

1618import qualified Data.Hashable as Hashable

@@ -22,6 +24,7 @@ import Data.Reflection

2224import Data.Traversable.WithIndex

2325import Data.Type.Coercion

2426import Data.Type.Equality ((:~:)(..))

27+import Prelude hiding (zipWith)

2528import Refined

2629import Refined.Unsafe

2730import Unsafe.Coerce

@@ -44,7 +47,10 @@ import Data.Monoid (All(..))

4447-- always derive @'KnownHashSet' s k@ by pattern matching on the 'Dict' returned

4548-- by 'keysSet'.

4649newtype HashMap s k a = HashMap (HashMap.HashMap k a)

47− deriving newtype (Eq, Ord, Show, Functor, Foldable, Hashable.Hashable, NFData)

50+ deriving newtype

51+ ( Eq, Eq1, Eq2, Ord, Ord1, Ord2, Show, Show1, Show2

52+ , Functor, Foldable, Bifoldable, Hashable.Hashable, NFData

53+ )

4854 deriving stock (Traversable)

4955type role HashMap nominal nominal representational

5056

@@ -90,7 +96,7 @@ data SomeHashMap k a where

9096--

9197-- @

9298-- 'withHashMap' ('fromHashMap' ...

93−-- $ \(m :: 'HashMap' s k a) -> doSomethingWith \@s

99+-- $ \\(m :: 'HashMap' s k a) -> doSomethingWith \@s

94100-- @

95101withHashMap

96102 :: forall k a r. SomeHashMap k a -> (forall s. HashMap s k a -> r) -> r

@@ -100,6 +106,26 @@ withHashMap (SomeHashMap m) k = k m

100106fromHashMap :: forall k a. HashMap.HashMap k a -> SomeHashMap k a

101107fromHashMap m = SomeHashMap (HashMap m)

102108

109+-- | Given a set of keys @s@ known ahead of time, verify whether a regular

110+-- 'Data.HashMap.Lazy.HashMap' has exactly that set of keys.

111+verifyHashMap

112+ :: forall s k a. (Hashable k, KnownHashSet s k)

113+ => HashMap.HashMap k a -> Maybe (HashMap s k a)

114+verifyHashMap m

115+#if MIN_VERSION_unordered_containers(0, 2, 12)

116+ | HashMap.isSubmapOfBy (\_ _ -> True) m (HashSet.toMap keys)

117+ , HashMap.isSubmapOfBy (\_ _ -> True) (HashSet.toMap keys) m

118+#else

119+ | All True <- flip HashMap.foldMapWithKey m \k _

120+ -> All $ k `HashSet.member` keys

121+ , All True <- flip foldMap keys \k

122+ -> All $ k `HashMap.member` m

123+#endif

124+ = Just (HashMap m)

125+ | otherwise = Nothing

126+ where

127+ keys = reflect $ Proxy @s

128+

103129-- | An existential wrapper for a 'HashMap' with an as-yet-unknown set of keys,

104130-- together with a proof of some fact @p@ about the set. Pattern matching on it

105131-- gives you a way to refer to the set (the parameter @s@). Functions that

@@ -214,11 +240,25 @@ disjoint (HashMap m1) (HashMap m2)

214240

215241-- | Given two maps proven to have the same keys, for each key apply the

216242-- function to the associated values, to obtain a new map with the same keys.

217−zipWithKey

243+zipWith

218244 :: forall s k a b c. Hashable k

219− => (Key s k -> a -> b -> c) -> HashMap s k a -> HashMap s k b -> HashMap s k c

220−zipWithKey f (HashMap m1) (HashMap m2) = HashMap

221− $ HashMap.intersectionWithKey (f . unsafeKey) m1 m2

245+ => (a -> b -> c) -> HashMap s k a -> HashMap s k b -> HashMap s k c

246+zipWith f (HashMap m1) (HashMap m2) = HashMap $ HashMap.intersectionWith f m1 m2

247+

248+-- | Return the union of two maps. For keys that exist in both maps, the value

249+-- is taken from the first map.

250+--

251+-- @

252+-- 'union' = unionWith 'const'

253+-- @

254+union

255+ :: forall s t k a. Hashable k

256+ => HashMap s k a

257+ -> HashMap t k a

258+ -> SomeHashMapWith (UnionProof 'Hashed s t) k a

259+union (HashMap m1) (HashMap m2) = SomeHashMapWith

260+ (HashMap $ HashMap.union m1 m2)

261+ $ UnionProof unsafeSubset unsafeSubsetWith2

222262

223263-- | Remove the keys that appear in the second map from the first map.

224264difference

@@ -230,6 +270,20 @@ difference (HashMap m1) (HashMap m2)

230270 = SomeHashMapWith (HashMap $ HashMap.difference m1 m2)

231271 $ DifferenceProof unsafeSubset (\f g -> unsafeSubsetWith2 f g) unsafeSubset

232272

273+-- | Return the intersection of two maps, taking values from the first map.

274+--

275+-- @

276+-- 'intersection' = intersectionWith 'const'

277+-- @

278+intersection

279+ :: forall s t k a b. Hashable k

280+ => HashMap s k a

281+ -> HashMap t k b

282+ -> SomeHashMapWith (IntersectionProof 'Hashed s t) k a

283+intersection (HashMap m1) (HashMap m2) = SomeHashMapWith

284+ (HashMap $ HashMap.intersection m1 m2)

285+ $ IntersectionProof unsafeSubset unsafeSubsetWith2

286+

233287-- | Apply a function to all values in a map, together with their corresponding

234288-- keys, that are proven to be in the map. The set of keys remains the same.

235289mapWithKey

@@ -288,6 +342,25 @@ keysSet (HashMap m) = reify (HashMap.keysSet m)

288342toList :: forall s k a. HashMap s k a -> [(Key s k, a)]

289343toList = gcoerceWith (unsafeCastKey @s @k) $ coerce $ HashMap.toList @k @a

290344

345+-- | Retain only the values that satisfy the predicate, returning a potentially

346+-- smaller map.

347+filter

348+ :: forall s k a. (a -> Bool)

349+ -> HashMap s k a

350+ -> SomeHashMapWith (SupersetProof 'Hashed s) k a

351+filter p (HashMap m) = SomeHashMapWith (HashMap $ HashMap.filter p m)

352+ $ SupersetProof unsafeSubset

353+

354+-- | Retain only the keys that satisfy the predicate, returning a potentially

355+-- smaller map.

356+filterKeys

357+ :: forall s k a. (Key s k -> Bool)

358+ -> HashMap s k a

359+ -> SomeHashMapWith (SupersetProof 'Hashed s) k a

360+filterKeys p (HashMap m) = SomeHashMapWith

361+ (HashMap $ HashMap.filterWithKey (\k _ -> p (unsafeKey k)) m)

362+ $ SupersetProof unsafeSubset

363+

291364-- | Retain only the key-value pairs that satisfy the predicate, returning a

292365-- potentially smaller map.

293366filterWithKey

@@ -315,6 +388,25 @@ withoutKeys (HashMap m) = SomeHashMapWith

315388 (HashMap $ HashMap.difference m $ HashSet.toMap $ reflect $ Proxy @t)

316389 $ DifferenceProof unsafeSubset (\f g -> unsafeSubsetWith2 f g) unsafeSubset

317390

391+-- | Partition a map into two disjoint submaps: those whose key-value pairs

392+-- satisfy the predicate, and those whose don't.

393+partition

394+ :: forall s k a. Hashable k -- TODO: this is only used in the proof

395+ => (a -> Bool)

396+ -> HashMap s k a

397+ -> Some2HashMapWith (PartitionProof 'Hashed s k) k a a

398+partition p (HashMap m) = Some2HashMapWith

399+ (HashMap $ HashMap.filter p m)

400+ (HashMap $ HashMap.filter (not . p) m)

401+ $ PartitionProof

402+ do \k -> case HashMap.lookup (unrefine k) m of

403+ Nothing -> error

404+ "partition: bug: Data.HashMap.Refined has been subverted"

405+ Just x -> if p x

406+ then Left $ unsafeKey $ unrefine k

407+ else Right $ unsafeKey $ unrefine k

408+ unsafeSubset unsafeSubsetWith2 \f g -> unsafeSubsetWith2 f g

409+

318410-- | Partition a map into two disjoint submaps: those whose key-value pairs

319411-- satisfy the predicate, and those whose don't.

320412partitionWithKey

@@ -349,15 +441,15 @@ castKey

349441castKey = castRefined

350442

351443-- | If keys can be interconverted (e.g. as proved by 'castKey'), then the maps

352−-- can be interconverted too. For example, 'zipWithKey' can be implemented via

353−-- 'Data.HashMap.Refined.intersectionWithKey' by proving that the set of keys

354−-- remains unchanged:

444+-- can be interconverted too. For example, 'Data.HashMap.Refined.zipWithKey' can

445+-- be implemented via 'Data.HashMap.Refined.intersectionWithKey' by proving that

446+-- the set of keys remains unchanged:

355447--

356448-- @

357−-- 'zipWithKey'

449+-- 'Data.HashMap.Refined.zipWithKey'

358450-- :: forall s k a b c. 'Hashable' k

359451-- => ('Key' s k -> a -> b -> c) -> 'HashMap' s k a -> 'HashMap' s k b -> 'HashMap' s k c

360−-- 'zipWithKey' f m1 m2

452+-- 'Data.HashMap.Refined.zipWithKey' f m1 m2

361453-- | v'SomeHashMapWith' @r m proof <- 'Data.HashMap.Refined.intersectionWithKey' (f . 'andLeft') m1 m2

362454-- , v'IntersectionProof' p1 p2 <- proof

363455-- , ( v'Coercion' :: t'Coercion' ('HashMap' r k c) ('HashMap' s k c))

@@ -382,10 +474,10 @@ instance TraversableWithIndex (Key s k) (HashMap s k) where

382474 itraverse = traverseWithKey

383475

384476-- | Similar to the instance for functions -- zip corresponding keys. To use

385−-- '<*>'/'Control.Applicative.liftA2' without 'KnownSet' see 'zipWithKey'.

477+-- '<*>'/'Control.Applicative.liftA2' without 'KnownHashSet' see 'zipWith'.

386478instance (Hashable k, KnownHashSet s k) => Applicative (HashMap s k) where

387479 pure x = fromSet \_ -> x

388− (<*>) = zipWithKey (const id)

480+ (<*>) = zipWith id

389481

390482-- | @'bind' m f@ is a map that for each key @k :: 'Key' s k@, contains the

391483-- value @f (m '!' k) '!' k@, similar to @'>>='@ for functions.

@@ -394,8 +486,8 @@ bind

394486 => HashMap s k a -> (a -> HashMap s k b) -> HashMap s k b

395487bind m f = mapWithKey (\k x -> f x ! k) m

396488

397−-- | Similar to the instance for functions. To use '>>=' without 'KnownSet' see

398−-- 'bind'.

489+-- | Similar to the instance for functions. To use '>>=' without 'KnownHashSet'

490+-- see 'bind'.

399491instance (Hashable k, KnownHashSet s k) => Monad (HashMap s k) where

400492 (>>=) = bind

401493

@@ -408,7 +500,7 @@ instance (Hashable k, KnownHashSet s k)

408500

409501-- | Append the values at the corresponding keys

410502instance (Hashable k, Semigroup a) => Semigroup (HashMap s k a) where

411− (<>) = zipWithKey (const (<>))

503+ (<>) = zipWith (<>)

412504

413505instance (Hashable k, KnownHashSet s k, Monoid a)

414506 => Monoid (HashMap s k a) where

src/Data/HashMap/Refined.hs+226−9

@@ -43,18 +43,26 @@ module Data.HashMap.Refined

4343 , SingletonProof(..)

4444 , fromSet

4545 , Common.fromHashMap

46+ , Common.verifyHashMap

47+ , fromTraversable

48+ , fromTraversableWith

4649 , fromTraversableWithKey

4750 , FromTraversableProof(..)

4851 -- * Insertion

4952 , insert

53+ , insertWith

54+ , insertWithKey

5055 , InsertProof(..)

5156 , reinsert

5257 , insertLookupWithKey

5358 -- * Deletion/Update

5459 , Common.delete

60+ , adjust'

5561 , adjust

5662 , adjustWithKey

63+ , update'

5764 , update

65+ , updateWithKey

5866 , updateLookupWithKey

5967 -- * Query

6068 , Common.lookup

@@ -66,21 +74,29 @@ module Data.HashMap.Refined

6674 , Common.disjoint

6775 , DisjointProof(..)

6876 -- * Combine

77+ , zipWith

6978 , zipWithKey

7079 , bind

80+ , Common.union

81+ , unionWith

7182 , unionWithKey

7283 , UnionProof(..)

7384 , Common.difference

7485 , DifferenceProof(..)

86+ , differenceWith

7587 , differenceWithKey

7688 , PartialDifferenceProof(..)

89+ , Common.intersection

90+ , intersectionWith

7791 , intersectionWithKey

7892 , IntersectionProof(..)

7993 -- * Traversal

94+ , map

8095 , mapWithKey

8196 , traverseWithKey

8297 , mapAccumLWithKey

8398 , mapAccumRWithKey

99+ , mapKeys

84100 , mapKeysWith

85101 , MapProof(..)

86102 , backpermuteKeys

@@ -97,10 +113,15 @@ module Data.HashMap.Refined

97113 -- * Filter

98114 , Common.restrictKeys

99115 , Common.withoutKeys

116+ , Common.filter

117+ , Common.filterKeys

100118 , Common.filterWithKey

119+ , Common.partition

101120 , Common.partitionWithKey

102121 , PartitionProof(..)

122+ , mapMaybe

103123 , mapMaybeWithKey

124+ , mapEither

104125 , mapEitherWithKey

105126 -- * Casts

106127 , Common.castKey

@@ -115,7 +136,7 @@ import Data.Container.Refined.Unsafe

115136import Data.Functor

116137import Data.HashMap.Common.Refined

117138 ( HashMap(..), Key, unsafeCastKey, unsafeKey, SomeHashMapWith(..)

118− , Some2HashMapWith(..), fromSet, (!), zipWithKey, mapWithKey, traverseWithKey

139+ , Some2HashMapWith(..), fromSet, (!), zipWith, mapWithKey, traverseWithKey

119140 , bind

120141 )

121142import qualified Data.HashMap.Common.Refined as Common

@@ -123,7 +144,7 @@ import qualified Data.HashMap.Lazy as HashMap

123144import Data.Traversable

124145import Data.Traversable.WithIndex

125146import Data.Type.Coercion

126−import Prelude hiding (lookup, null)

147+import Prelude hiding (lookup, map, null, zipWith)

127148import Refined

128149import Refined.Unsafe

129150

@@ -136,7 +157,42 @@ singleton

136157singleton k v = SomeHashMapWith (HashMap $ HashMap.singleton k v)

137158 $ SingletonProof (unsafeKey k)

138159

139−-- | Create a map from an arbitrary traversable of key-value pairs.

160+-- | Create a map from an arbitrary traversable of key-value pairs. If a key is

161+-- repeated, the retained value is the last one in traversal order. If you're

162+-- looking for @fromList@, this is the function you want.

163+fromTraversable

164+ :: forall t k a. (Traversable t, Hashable k)

165+ => t (k, a) -> SomeHashMapWith (FromTraversableProof 'Hashed t k) k a

166+fromTraversable xs = SomeHashMapWith (HashMap m) $ FromTraversableProof proof

167+ where

168+ (m, proof) = mapAccumL

169+ (\s (k, v) -> let !s' = HashMap.insert k v s in (s', unsafeKey k))

170+ HashMap.empty

171+ xs

172+

173+-- | Create a map from an arbitrary traversable of key-value pairs, with a

174+-- function for combining values for repeated keys. The function is called as if

175+-- by 'foldl1', but flipped:

176+--

177+-- @

178+-- 'fromTraversableWith' f [(k, x1), (k, x2), (k, x3)]

179+-- = 'singleton' k (f x3 (f x2 x1))

180+-- @

181+fromTraversableWith

182+ :: forall t k a. (Traversable t, Hashable k)

183+ => (a -> a -> a)

184+ -> t (k, a)

185+ -> SomeHashMapWith (FromTraversableProof 'Hashed t k) k a

186+fromTraversableWith f xs

187+ = SomeHashMapWith (HashMap m) $ FromTraversableProof proof

188+ where

189+ (m, proof) = mapAccumL

190+ (\s (k, v) -> let !s' = HashMap.insertWith f k v s in (s', unsafeKey k))

191+ HashMap.empty

192+ xs

193+

194+-- | Create a map from an arbitrary traversable of key-value pairs. Like

195+-- 'fromTraversableWith', but the combining function has access to the key.

140196fromTraversableWithKey

141197 :: forall t k a. (Traversable t, Hashable k)

142198 => (k -> a -> a -> a)

@@ -160,6 +216,35 @@ insert

160216insert k v (HashMap m) = SomeHashMapWith (HashMap $ HashMap.insert k v m)

161217 $ InsertProof (unsafeKey k) unsafeSubset

162218

219+-- | Insert a key-value pair into the map to obtain a potentially larger map,

220+-- guaranteed to contain the given key. If the key was already present, the

221+-- supplied function is used to combine the new value with the old (in that

222+-- order).

223+insertWith

224+ :: forall s k a. Hashable k

225+ => (a -> a -> a)

226+ -> k

227+ -> a

228+ -> HashMap s k a

229+ -> SomeHashMapWith (InsertProof 'Hashed k s) k a

230+insertWith f k v (HashMap m) = SomeHashMapWith

231+ (HashMap $ HashMap.insertWith f k v m)

232+ $ InsertProof (unsafeKey k) unsafeSubset

233+

234+-- | Insert a key-value pair into the map to obtain a potentially larger map,

235+-- guaranteed to contain the given key. Like 'insertWith', but the combining

236+-- function has access to the key, which is guaranteed to be in the old map.

237+insertWithKey

238+ :: forall s k a. Hashable k

239+ => (Key s k -> a -> a -> a)

240+ -> k

241+ -> a

242+ -> HashMap s k a

243+ -> SomeHashMapWith (InsertProof 'Hashed k s) k a

244+insertWithKey f k v (HashMap m) = SomeHashMapWith

245+ (HashMap $ HashMap.insertWith (f $ unsafeKey k) k v m)

246+ $ InsertProof (unsafeKey k) unsafeSubset

247+

163248-- | Overwrite a key-value pair that is known to already be in the map. The set

164249-- of keys remains the same.

165250reinsert

@@ -183,12 +268,22 @@ insertLookupWithKey f k v (HashMap m) =

183268 $ InsertProof (unsafeKey k) unsafeSubset

184269 )

185270

271+-- | If the given key is in the map, update the value at that key using the

272+-- given function. In any case, the set of keys remains the same.

273+adjust'

274+ :: forall s k a. Hashable k => (a -> a) -> k -> HashMap s k a -> HashMap s k a

275+adjust' = coerce $ HashMap.adjust @k @a

276+

186277-- | Update the value at a specific key known the be in the map using the given

187278-- function. The set of keys remains the same.

279+--

280+-- @

281+-- 'reinsert' k v = 'adjust (const v) k'

282+-- @

188283adjust

189284 :: forall s k a. Hashable k

190285 => (a -> a) -> Key s k -> HashMap s k a -> HashMap s k a

191−adjust = gcoerceWith (unsafeCastKey @s @k) $ coerce $ HashMap.adjust @k @a

286+adjust = gcoerceWith (unsafeCastKey @s @k) $ coerce $ adjust' @s @k @a

192287

193288-- | If the given key is in the map, update the associated value using the given

194289-- function with a proof that the key was in the map; otherwise return the map

@@ -198,6 +293,17 @@ adjustWithKey

198293 => (Key s k -> a -> a) -> k -> HashMap s k a -> HashMap s k a

199294adjustWithKey f k (HashMap m) = HashMap $ HashMap.adjust (f $ unsafeKey k) k m

200295

296+-- | If a key is present in the map, update its value or delete it using the

297+-- given function, returning a potentially smaller map.

298+update'

299+ :: forall s k a. Hashable k

300+ => (a -> Maybe a)

301+ -> k

302+ -> HashMap s k a

303+ -> SomeHashMapWith (SupersetProof 'Hashed s) k a

304+update' f k (HashMap m) = SomeHashMapWith (HashMap $ HashMap.update f k m)

305+ $ SupersetProof unsafeSubset

306+

201307-- | Update or delete a key known to be in the map using the given function,

202308-- returning a potentially smaller map.

203309update

@@ -206,9 +312,20 @@ update

206312 -> Key s k

207313 -> HashMap s k a

208314 -> SomeHashMapWith (SupersetProof 'Hashed s) k a

209−update f k (HashMap m)

210− = SomeHashMapWith (HashMap $ HashMap.update f (unrefine k) m)

211− $ SupersetProof unsafeSubset

315+update = gcoerceWith (unsafeCastKey @s @k) $ coerce $ update' @s @k @a

316+

317+-- | If a key is present in the map, update its value or delete it using the

318+-- given function with a proof that the key was in the map, returning a

319+-- potentially smaller map.

320+updateWithKey

321+ :: forall s k a. Hashable k

322+ => (Key s k -> a -> Maybe a)

323+ -> k

324+ -> HashMap s k a

325+ -> SomeHashMapWith (SupersetProof 'Hashed s) k a

326+updateWithKey f k (HashMap m) = SomeHashMapWith

327+ (HashMap $ HashMap.update (f $ unsafeKey k) k m)

328+ $ SupersetProof unsafeSubset

212329

213330-- | If the given key is in the map, update or delete it using the given

214331-- function with a proof that the key was in the map; otherwise the map is

@@ -226,6 +343,27 @@ updateLookupWithKey f k (HashMap m) =

226343 $ SupersetProof unsafeSubset

227344 )

228345

346+-- | Given two maps proven to have the same keys, for each key apply the

347+-- function to the associated values and the key, to obtain a new map with the

348+-- same keys.

349+zipWithKey

350+ :: forall s k a b c. Hashable k

351+ => (Key s k -> a -> b -> c) -> HashMap s k a -> HashMap s k b -> HashMap s k c

352+zipWithKey f (HashMap m1) (HashMap m2) = HashMap

353+ $ HashMap.intersectionWithKey (f . unsafeKey) m1 m2

354+

355+-- | Return the union of two maps, with a given combining function for keys that

356+-- exist in both maps simultaneously.

357+unionWith

358+ :: forall s t k a. Hashable k

359+ => (a -> a -> a)

360+ -> HashMap s k a

361+ -> HashMap t k a

362+ -> SomeHashMapWith (UnionProof 'Hashed s t) k a

363+unionWith f (HashMap m1) (HashMap m2) = SomeHashMapWith

364+ (HashMap $ HashMap.unionWith f m1 m2)

365+ $ UnionProof unsafeSubset unsafeSubsetWith2

366+

229367-- | Return the union of two maps, with a given combining function for keys that

230368-- exist in both maps simultaneously.

231369--

@@ -241,8 +379,20 @@ unionWithKey f (HashMap m1) (HashMap m2) = SomeHashMapWith

241379 (HashMap $ HashMap.unionWithKey (f . reallyUnsafeRefine) m1 m2)

242380 $ UnionProof unsafeSubset unsafeSubsetWith2

243381

244−-- | For keys that appear in both maps, the given function decides whether the

245−-- key is removed from the first map.

382+-- | Return the first map, but for keys that appear in both maps, the given

383+-- function decides whether the key is removed.

384+differenceWith

385+ :: forall s t k a b. Hashable k

386+ => (a -> b -> Maybe a)

387+ -> HashMap s k a

388+ -> HashMap t k b

389+ -> SomeHashMapWith (PartialDifferenceProof 'Hashed s t) k a

390+differenceWith f (HashMap m1) (HashMap m2) = SomeHashMapWith

391+ (HashMap $ HashMap.differenceWith f m1 m2)

392+ $ PartialDifferenceProof unsafeSubset unsafeSubset

393+

394+-- | Return the first map, but for keys that appear in both maps, the given

395+-- function decides whether the key is removed.

246396--

247397-- You can use 'andLeft' and 'andRight' to obtain @'Key' s k@ and @'Key' t k@

248398-- respectively.

@@ -259,6 +409,17 @@ differenceWithKey f (HashMap m1) (HashMap m2) = SomeHashMapWith

259409 (HashMap.mapWithKey (,) m2))

260410 $ PartialDifferenceProof unsafeSubset unsafeSubset

261411

412+-- | Return the intersection of two maps with the given combining function.

413+intersectionWith

414+ :: forall s t k a b c. Hashable k

415+ => (a -> b -> c)

416+ -> HashMap s k a

417+ -> HashMap t k b

418+ -> SomeHashMapWith (IntersectionProof 'Hashed s t) k c

419+intersectionWith f (HashMap m1) (HashMap m2) = SomeHashMapWith

420+ (HashMap $ HashMap.intersectionWith f m1 m2)

421+ $ IntersectionProof unsafeSubset unsafeSubsetWith2

422+

262423-- | Return the intersection of two maps with the given combining function.

263424--

264425-- You can use 'andLeft' and 'andRight' to obtain @'Key' s k@ and @'Key' t k@

@@ -273,6 +434,10 @@ intersectionWithKey f (HashMap m1) (HashMap m2) = SomeHashMapWith

273434 (HashMap $ HashMap.intersectionWithKey (f . reallyUnsafeRefine) m1 m2)

274435 $ IntersectionProof unsafeSubset unsafeSubsetWith2

275436

437+-- | Apply a function to all values in a map. The set of keys remains the same.

438+map :: forall s k a b. (a -> b) -> HashMap s k a -> HashMap s k b

439+map = coerce $ HashMap.map @a @b @k

440+

276441-- | Thread an accumularing argument through the map in ascending order of

277442-- hashes.

278443mapAccumLWithKey

@@ -291,6 +456,28 @@ mapAccumRWithKey

291456 -> (a, HashMap s k c)

292457mapAccumRWithKey f = imapAccumR (flip f)

293458

459+-- | @'mapKeys' f m@ applies @f@ to each key of @m@ and collects the results

460+-- into a new map. For keys that were mapped to the same new key, the value is

461+-- picked in an unspecified way.

462+mapKeys

463+ :: forall s k1 k2 a. Hashable k2

464+ => (Key s k1 -> k2)

465+ -> HashMap s k1 a

466+ -> SomeHashMapWith (MapProof 'Hashed s k1 k2) k2 a

467+mapKeys g (HashMap m) = SomeHashMapWith

468+ (HashMap $ HashMap.fromList

469+ $ HashMap.foldrWithKey (\k x xs -> (g $ unsafeKey k, x) : xs) [] m)

470+ $ MapProof (unsafeKey . g) \k2 ->

471+ case HashMap.lookup (unrefine k2) backMap of

472+ Nothing -> error "mapKeys: bug: Data.HashMap.Refined has been subverted"

473+ Just k1 -> k1

474+ where

475+ ~backMap = HashMap.fromList

476+ [ (k2, unsafeKey k1)

477+ | k1 <- HashMap.keys m

478+ , let !k2 = g $ unsafeKey k1

479+ ]

480+

294481-- | @'mapKeysWith' c f m@ applies @f@ to each key of @m@ and collects the

295482-- results into a new map. For keys that were mapped to the same new key, @c@

296483-- acts as the combining function for corresponding values.

@@ -315,6 +502,15 @@ mapKeysWith f g (HashMap m) = SomeHashMapWith

315502 , let !k2 = g $ unsafeKey k1

316503 ]

317504

505+-- | Apply a function to all values in a map and collect only the 'Just'

506+-- results, returning a potentially smaller map.

507+mapMaybe

508+ :: forall s k a b. (a -> Maybe b)

509+ -> HashMap s k a

510+ -> SomeHashMapWith (SupersetProof 'Hashed s) k b

511+mapMaybe f (HashMap m) = SomeHashMapWith (HashMap $ HashMap.mapMaybe f m)

512+ $ SupersetProof unsafeSubset

513+

318514-- | Apply a function to all values in a map, together with their corresponding

319515-- keys, and collect only the 'Just' results, returning a potentially smaller

320516-- map.

@@ -326,6 +522,27 @@ mapMaybeWithKey f (HashMap m)

326522 = SomeHashMapWith (HashMap $ HashMap.mapMaybeWithKey (f . unsafeKey) m)

327523 $ SupersetProof unsafeSubset

328524

525+-- | Apply a function to all values in a map and collect the 'Left' and 'Right'

526+-- results into separate (disjoint) maps.

527+mapEither

528+ :: forall s k a b c. Hashable k -- TODO: this is only used in the proof

529+ => (a -> Either b c)

530+ -> HashMap s k a

531+ -> Some2HashMapWith (PartitionProof 'Hashed s k) k b c

532+mapEither p (HashMap m)

533+ | m' <- HashMap.map p m

534+ = Some2HashMapWith

535+ (HashMap $ HashMap.mapMaybe (either Just (const Nothing)) m')

536+ (HashMap $ HashMap.mapMaybe (either (const Nothing) Just) m')

537+ $ PartitionProof

538+ do \k -> case HashMap.lookup (unrefine k) m of

539+ Nothing -> error

540+ "mapEither: bug: Data.HashMap.Refined has been subverted"

541+ Just x -> case p x of

542+ Left _ -> Left $ unsafeKey $ unrefine k

543+ Right _ -> Right $ unsafeKey $ unrefine k

544+ unsafeSubset unsafeSubsetWith2 \f g -> unsafeSubsetWith2 f g

545+

329546-- | Apply a function to all values in a map, together with their corresponding

330547-- keys, and collect the 'Left' and 'Right' results into separate (disjoint)

331548-- maps.

src/Data/HashMap/Strict/Refined.hs+227−10

@@ -43,18 +43,26 @@ module Data.HashMap.Strict.Refined

4343 , SingletonProof(..)

4444 , fromSet

4545 , Common.fromHashMap

46+ , Common.verifyHashMap

47+ , fromTraversable

48+ , fromTraversableWith

4649 , fromTraversableWithKey

4750 , FromTraversableProof(..)

4851 -- * Insertion

4952 , insert

53+ , insertWith

54+ , insertWithKey

5055 , InsertProof(..)

5156 , reinsert

5257 , insertLookupWithKey

5358 -- * Deletion/Update

5459 , Common.delete

60+ , adjust'

5561 , adjust

5662 , adjustWithKey

63+ , update'

5764 , update

65+ , updateWithKey

5866 , updateLookupWithKey

5967 -- * Query

6068 , Common.lookup

@@ -66,21 +74,29 @@ module Data.HashMap.Strict.Refined

6674 , Common.disjoint

6775 , DisjointProof(..)

6876 -- * Combine

77+ , zipWith

6978 , zipWithKey

7079 , bind

80+ , Common.union

81+ , unionWith

7182 , unionWithKey

7283 , UnionProof(..)

7384 , Common.difference

7485 , DifferenceProof(..)

86+ , differenceWith

7587 , differenceWithKey

7688 , PartialDifferenceProof(..)

89+ , Common.intersection

90+ , intersectionWith

7791 , intersectionWithKey

7892 , IntersectionProof(..)

7993 -- * Traversal

94+ , map

8095 , mapWithKey

8196 , traverseWithKey

8297 , mapAccumLWithKey

8398 , mapAccumRWithKey

99+ , mapKeys

84100 , mapKeysWith

85101 , MapProof(..)

86102 , backpermuteKeys

@@ -97,10 +113,15 @@ module Data.HashMap.Strict.Refined

97113 -- * Filter

98114 , Common.restrictKeys

99115 , Common.withoutKeys

116+ , Common.filter

117+ , Common.filterKeys

100118 , Common.filterWithKey

119+ , Common.partition

101120 , Common.partitionWithKey

102121 , PartitionProof(..)

122+ , mapMaybe

103123 , mapMaybeWithKey

124+ , mapEither

104125 , mapEitherWithKey

105126 -- * Casts

106127 , Common.castKey

@@ -125,7 +146,7 @@ import Data.Reflection

125146import Data.Traversable

126147import Data.Traversable.WithIndex

127148import Data.Type.Coercion

128−import Prelude hiding (lookup, null)

149+import Prelude hiding (lookup, map, null, zipWith)

129150import Refined

130151import Refined.Unsafe

131152

@@ -144,14 +165,49 @@ fromSet :: forall s k a. KnownHashSet s k => (Key s k -> a) -> HashMap s k a

144165fromSet f = HashMap $ HashMap.mapWithKey (\k _ -> f $ unsafeKey k)

145166 $ HashSet.toMap (reflect $ Proxy @s)

146167

147−-- | Create a map from an arbitrary traversable of key-value pairs.

168+-- | Create a map from an arbitrary traversable of key-value pairs. If a key is

169+-- repeated, the retained value is the last one in traversal order. If you're

170+-- looking for @fromList@, this is the function you want.

171+fromTraversable

172+ :: forall t k a. (Traversable t, Hashable k)

173+ => t (k, a) -> SomeHashMapWith (FromTraversableProof 'Hashed t k) k a

174+fromTraversable xs = SomeHashMapWith (HashMap m) $ FromTraversableProof proof

175+ where

176+ (m, proof) = mapAccumL

177+ (\s (k, v) -> let !s' = HashMap.insert k v s in (s', unsafeKey k))

178+ HashMap.empty

179+ xs

180+

181+-- | Create a map from an arbitrary traversable of key-value pairs, with a

182+-- function for combining values for repeated keys. The function is called as if

183+-- by 'foldl1', but flipped:

184+--

185+-- @

186+-- 'fromTraversableWith' f [(k, x1), (k, x2), (k, x3)]

187+-- = 'singleton' k (f x3 (f x2 x1))

188+-- @

189+fromTraversableWith

190+ :: forall t k a. (Traversable t, Hashable k)

191+ => (a -> a -> a)

192+ -> t (k, a)

193+ -> SomeHashMapWith (FromTraversableProof 'Hashed t k) k a

194+fromTraversableWith f xs

195+ = SomeHashMapWith (HashMap m) $ FromTraversableProof proof

196+ where

197+ (m, proof) = mapAccumL

198+ (\s (k, v) -> let !s' = HashMap.insertWith f k v s in (s', unsafeKey k))

199+ HashMap.empty

200+ xs

201+

202+-- | Create a map from an arbitrary traversable of key-value pairs. Like

203+-- 'fromTraversableWith', but the combining function has access to the key.

148204fromTraversableWithKey

149205 :: forall t k a. (Traversable t, Hashable k)

150206 => (k -> a -> a -> a)

151207 -> t (k, a)

152208 -> SomeHashMapWith (FromTraversableProof 'Hashed t k) k a

153−fromTraversableWithKey f xs = SomeHashMapWith (HashMap m)

154− $ FromTraversableProof proof

209+fromTraversableWithKey f xs

210+ = SomeHashMapWith (HashMap m) $ FromTraversableProof proof

155211 where

156212 (m, proof) = mapAccumL

157213 (\s (k, v)

@@ -168,8 +224,41 @@ insert

168224insert k v (HashMap m) = SomeHashMapWith (HashMap $ HashMap.insert k v m)

169225 $ InsertProof (unsafeKey k) unsafeSubset

170226

227+-- | Insert a key-value pair into the map to obtain a potentially larger map,

228+-- guaranteed to contain the given key. If the key was already present, the

229+-- supplied function is used to combine the new value with the old (in that

230+-- order).

231+insertWith

232+ :: forall s k a. Hashable k

233+ => (a -> a -> a)

234+ -> k

235+ -> a

236+ -> HashMap s k a

237+ -> SomeHashMapWith (InsertProof 'Hashed k s) k a

238+insertWith f k v (HashMap m) = SomeHashMapWith

239+ (HashMap $ HashMap.insertWith f k v m)

240+ $ InsertProof (unsafeKey k) unsafeSubset

241+

242+-- | Insert a key-value pair into the map to obtain a potentially larger map,

243+-- guaranteed to contain the given key. Like 'insertWith', but the combining

244+-- function has access to the key, which is guaranteed to be in the old map.

245+insertWithKey

246+ :: forall s k a. Hashable k

247+ => (Key s k -> a -> a -> a)

248+ -> k

249+ -> a

250+ -> HashMap s k a

251+ -> SomeHashMapWith (InsertProof 'Hashed k s) k a

252+insertWithKey f k v (HashMap m) = SomeHashMapWith

253+ (HashMap $ HashMap.insertWith (f $ unsafeKey k) k v m)

254+ $ InsertProof (unsafeKey k) unsafeSubset

255+

171256-- | Overwrite a key-value pair that is known to already be in the map. The set

172257-- of keys remains the same.

258+--

259+-- @

260+-- 'reinsert' k v = 'adjust (const v) k'

261+-- @

173262reinsert

174263 :: forall s k a. Hashable k

175264 => Key s k -> a -> HashMap s k a -> HashMap s k a

@@ -191,12 +280,18 @@ insertLookupWithKey f k v (HashMap m) =

191280 $ InsertProof (unsafeKey k) unsafeSubset

192281 )

193282

283+-- | If the given key is in the map, update the value at that key using the

284+-- given function. In any case, the set of keys remains the same.

285+adjust'

286+ :: forall s k a. Hashable k => (a -> a) -> k -> HashMap s k a -> HashMap s k a

287+adjust' = coerce $ HashMap.adjust @k @a

288+

194289-- | Update the value at a specific key known the be in the map using the given

195290-- function. The set of keys remains the same.

196291adjust

197292 :: forall s k a. Hashable k

198293 => (a -> a) -> Key s k -> HashMap s k a -> HashMap s k a

199−adjust = gcoerceWith (unsafeCastKey @s @k) $ coerce $ HashMap.adjust @k @a

294+adjust = gcoerceWith (unsafeCastKey @s @k) $ coerce $ adjust' @s @k @a

200295

201296-- | If the given key is in the map, update the associated value using the given

202297-- function with a proof that the key was in the map; otherwise return the map

@@ -206,6 +301,17 @@ adjustWithKey

206301 => (Key s k -> a -> a) -> k -> HashMap s k a -> HashMap s k a

207302adjustWithKey f k (HashMap m) = HashMap $ HashMap.adjust (f $ unsafeKey k) k m

208303

304+-- | If a key is present in the map, update its value or delete it using the

305+-- given function, returning a potentially smaller map.

306+update'

307+ :: forall s k a. Hashable k

308+ => (a -> Maybe a)

309+ -> k

310+ -> HashMap s k a

311+ -> SomeHashMapWith (SupersetProof 'Hashed s) k a

312+update' f k (HashMap m) = SomeHashMapWith (HashMap $ HashMap.update f k m)

313+ $ SupersetProof unsafeSubset

314+

209315-- | Update or delete a key known to be in the map using the given function,

210316-- returning a potentially smaller map.

211317update

@@ -214,9 +320,20 @@ update

214320 -> Key s k

215321 -> HashMap s k a

216322 -> SomeHashMapWith (SupersetProof 'Hashed s) k a

217−update f k (HashMap m)

218− = SomeHashMapWith (HashMap $ HashMap.update f (unrefine k) m)

219− $ SupersetProof unsafeSubset

323+update = gcoerceWith (unsafeCastKey @s @k) $ coerce $ update' @s @k @a

324+

325+-- | If a key is present in the map, update its value or delete it using the

326+-- given function with a proof that the key was in the map, returning a

327+-- potentially smaller map.

328+updateWithKey

329+ :: forall s k a. Hashable k

330+ => (Key s k -> a -> Maybe a)

331+ -> k

332+ -> HashMap s k a

333+ -> SomeHashMapWith (SupersetProof 'Hashed s) k a

334+updateWithKey f k (HashMap m) = SomeHashMapWith

335+ (HashMap $ HashMap.update (f $ unsafeKey k) k m)

336+ $ SupersetProof unsafeSubset

220337

221338-- | If the given key is in the map, update or delete it using the given

222339-- function with a proof that the key was in the map; otherwise the map is

@@ -236,12 +353,32 @@ updateLookupWithKey f k (HashMap m) =

236353

237354-- | Given two maps proven to have the same keys, for each key apply the

238355-- function to the associated values, to obtain a new map with the same keys.

356+zipWith

357+ :: forall s k a b c. Hashable k

358+ => (a -> b -> c) -> HashMap s k a -> HashMap s k b -> HashMap s k c

359+zipWith f (HashMap m1) (HashMap m2) = HashMap $ HashMap.intersectionWith f m1 m2

360+

361+-- | Given two maps proven to have the same keys, for each key apply the

362+-- function to the associated values and the key, to obtain a new map with the

363+-- same keys.

239364zipWithKey

240365 :: forall s k a b c. Hashable k

241366 => (Key s k -> a -> b -> c) -> HashMap s k a -> HashMap s k b -> HashMap s k c

242367zipWithKey = gcoerceWith (unsafeCastKey @s @k) $ coerce

243368 $ HashMap.intersectionWithKey @k @a @b @c

244369

370+-- | Return the union of two maps, with a given combining function for keys that

371+-- exist in both maps simultaneously.

372+unionWith

373+ :: forall s t k a. Hashable k

374+ => (a -> a -> a)

375+ -> HashMap s k a

376+ -> HashMap t k a

377+ -> SomeHashMapWith (UnionProof 'Hashed s t) k a

378+unionWith f (HashMap m1) (HashMap m2) = SomeHashMapWith

379+ (HashMap $ HashMap.unionWith f m1 m2)

380+ $ UnionProof unsafeSubset unsafeSubsetWith2

381+

245382-- | Return the union of two maps, with a given combining function for keys that

246383-- exist in both maps simultaneously.

247384--

@@ -257,8 +394,20 @@ unionWithKey f (HashMap m1) (HashMap m2) = SomeHashMapWith

257394 (HashMap $ HashMap.unionWithKey (f . reallyUnsafeRefine) m1 m2)

258395 $ UnionProof unsafeSubset unsafeSubsetWith2

259396

260−-- | For keys that appear in both maps, the given function decides whether the

261−-- key is removed from the first map.

397+-- | Return the first map, but for keys that appear in both maps, the given

398+-- function decides whether the key is removed.

399+differenceWith

400+ :: forall s t k a b. Hashable k

401+ => (a -> b -> Maybe a)

402+ -> HashMap s k a

403+ -> HashMap t k b

404+ -> SomeHashMapWith (PartialDifferenceProof 'Hashed s t) k a

405+differenceWith f (HashMap m1) (HashMap m2) = SomeHashMapWith

406+ (HashMap $ HashMap.differenceWith f m1 m2)

407+ $ PartialDifferenceProof unsafeSubset unsafeSubset

408+

409+-- | Return the first map, but for keys that appear in both maps, the given

410+-- function decides whether the key is removed.

262411--

263412-- You can use 'andLeft' and 'andRight' to obtain @'Key' s k@ and @'Key' t k@

264413-- respectively.

@@ -275,6 +424,17 @@ differenceWithKey f (HashMap m1) (HashMap m2) = SomeHashMapWith

275424 (HashMap.mapWithKey (,) m2))

276425 $ PartialDifferenceProof unsafeSubset unsafeSubset

277426

427+-- | Return the intersection of two maps with the given combining function.

428+intersectionWith

429+ :: forall s t k a b c. Hashable k

430+ => (a -> b -> c)

431+ -> HashMap s k a

432+ -> HashMap t k b

433+ -> SomeHashMapWith (IntersectionProof 'Hashed s t) k c

434+intersectionWith f (HashMap m1) (HashMap m2) = SomeHashMapWith

435+ (HashMap $ HashMap.intersectionWith f m1 m2)

436+ $ IntersectionProof unsafeSubset unsafeSubsetWith2

437+

278438-- | Return the intersection of two maps with the given combining function.

279439--

280440-- You can use 'andLeft' and 'andRight' to obtain @'Key' s k@ and @'Key' t k@

@@ -289,6 +449,10 @@ intersectionWithKey f (HashMap m1) (HashMap m2) = SomeHashMapWith

289449 (HashMap $ HashMap.intersectionWithKey (f . reallyUnsafeRefine) m1 m2)

290450 $ IntersectionProof unsafeSubset unsafeSubsetWith2

291451

452+-- | Apply a function to all values in a map. The set of keys remains the same.

453+map :: forall s k a b. (a -> b) -> HashMap s k a -> HashMap s k b

454+map = coerce $ HashMap.map @a @b @k

455+

292456-- | Apply a function to all values in a map, together with their corresponding

293457-- keys, that are proven to be in the map. The set of keys remains the same.

294458mapWithKey

@@ -323,6 +487,29 @@ mapAccumRWithKey

323487 -> (a, HashMap s k c)

324488mapAccumRWithKey f = imapAccumR (flip f)

325489

490+-- | @'mapKeys' f m@ applies @f@ to each key of @m@ and collects the results

491+-- into a new map. For keys that were mapped to the same new key, the value is

492+-- picked in an unspecified way.

493+mapKeys

494+ :: forall s k1 k2 a. Hashable k2

495+ => (Key s k1 -> k2)

496+ -> HashMap s k1 a

497+ -> SomeHashMapWith (MapProof 'Hashed s k1 k2) k2 a

498+mapKeys g (HashMap m) = SomeHashMapWith

499+ (HashMap $ HashMap.fromList

500+ $ HashMap.foldrWithKey (\k x xs -> (g $ unsafeKey k, x) : xs) [] m)

501+ $ MapProof (unsafeKey . g) \k2 ->

502+ case HashMap.lookup (unrefine k2) backMap of

503+ Nothing -> error

504+ "mapKeys: bug: Data.HashMap.Strict.Refined has been subverted"

505+ Just k1 -> k1

506+ where

507+ ~backMap = HashMap.fromList

508+ [ (k2, unsafeKey k1)

509+ | k1 <- HashMap.keys m

510+ , let !k2 = g $ unsafeKey k1

511+ ]

512+

326513-- | @'mapKeysWith' c f m@ applies @f@ to each key of @m@ and collects the

327514-- results into a new map. For keys that were mapped to the same new key, @c@

328515-- acts as the combining function for corresponding values.

@@ -347,6 +534,15 @@ mapKeysWith f g (HashMap m) = SomeHashMapWith

347534 , let !k2 = g $ unsafeKey k1

348535 ]

349536

537+-- | Apply a function to all values in a map and collect only the 'Just'

538+-- results, returning a potentially smaller map.

539+mapMaybe

540+ :: forall s k a b. (a -> Maybe b)

541+ -> HashMap s k a

542+ -> SomeHashMapWith (SupersetProof 'Hashed s) k b

543+mapMaybe f (HashMap m) = SomeHashMapWith (HashMap $ HashMap.mapMaybe f m)

544+ $ SupersetProof unsafeSubset

545+

350546-- | Apply a function to all values in a map, together with their corresponding

351547-- keys, and collect only the 'Just' results, returning a potentially smaller

352548-- map.

@@ -358,6 +554,27 @@ mapMaybeWithKey f (HashMap m)

358554 = SomeHashMapWith (HashMap $ HashMap.mapMaybeWithKey (f . unsafeKey) m)

359555 $ SupersetProof unsafeSubset

360556

557+-- | Apply a function to all values in a map and collect the 'Left' and 'Right'

558+-- results into separate (disjoint) maps.

559+mapEither

560+ :: forall s k a b c. Hashable k -- TODO: this is only used in the proof

561+ => (a -> Either b c)

562+ -> HashMap s k a

563+ -> Some2HashMapWith (PartitionProof 'Hashed s k) k b c

564+mapEither p (HashMap m)

565+ | m' <- HashMap.map p m

566+ = Some2HashMapWith

567+ (HashMap $ HashMap.mapMaybe (either Just (const Nothing)) m')

568+ (HashMap $ HashMap.mapMaybe (either (const Nothing) Just) m')

569+ $ PartitionProof

570+ do \k -> case HashMap.lookup (unrefine k) m of

571+ Nothing -> error

572+ "mapEither: bug: Data.HashMap.Refined has been subverted"

573+ Just x -> case p x of

574+ Left _ -> Left $ unsafeKey $ unrefine k

575+ Right _ -> Right $ unsafeKey $ unrefine k

576+ unsafeSubset unsafeSubsetWith2 \f g -> unsafeSubsetWith2 f g

577+

361578-- | Apply a function to all values in a map, together with their corresponding

362579-- keys, and collect the 'Left' and 'Right' results into separate (disjoint)

363580-- maps.

src/Data/HashSet/Refined.hs+1−1

@@ -165,7 +165,7 @@ data SomeHashSet a where

165165-- you a way to refer to the set (the parameter @s@), e.g.:

166166--

167167-- @

168−-- 'withHashSet' ('fromHashSet' ...) $ \(_ :: 'Proxy' s) -> doSomethingWith \@s

168+-- 'withHashSet' ('fromHashSet' ...) $ \\(_ :: 'Proxy' s) -> doSomethingWith \@s

169169-- @

170170withHashSet

171171 :: forall a r. SomeHashSet a

src/Data/IntMap/Common/Refined.hs+134−15

@@ -14,11 +14,13 @@ import Data.Functor.Rep

1414import Data.Functor.WithIndex

1515import qualified Data.Hashable as Hashable

1616import qualified Data.IntMap as IntMap

17+import qualified Data.IntSet as IntSet

1718import Data.Proxy

1819import Data.Reflection

1920import Data.Traversable.WithIndex

2021import Data.Type.Coercion

2122import Data.Type.Equality ((:~:)(..))

23+import Prelude hiding (zipWith)

2224import Refined

2325import Refined.Unsafe

2426import Unsafe.Coerce

@@ -36,6 +38,9 @@ import qualified Data.IntMap.Strict as IntMapStrict

3638import qualified Data.List as List

3739#endif

3840

41+#if MIN_VERSION_containers(0, 5, 9) || MIN_VERSION_hashable(1, 4, 0)

42+import Data.Functor.Classes

43+#endif

3944

4045-- | A wrapper around a regular 'Data.IntMap.IntMap' with a type parameter @s@

4146-- identifying the set of keys present in the map.

@@ -51,6 +56,9 @@ newtype IntMap s a = IntMap (IntMap.IntMap a)

5156 deriving newtype (Eq, Ord, Show, Functor, Foldable, NFData)

5257#if MIN_VERSION_hashable(1, 3, 4)

5358 deriving newtype (Hashable.Hashable)

59+#endif

60+#if MIN_VERSION_containers(0, 5, 9) || MIN_VERSION_hashable(1, 4, 0)

61+ deriving newtype (Eq1, Ord1, Show1)

5462#endif

5563 deriving stock (Traversable)

5664type role IntMap nominal representational

@@ -96,7 +104,8 @@ data SomeIntMap a where

96104-- parameter @s@), e.g.:

97105--

98106-- @

99−-- 'withIntMap' ('fromIntMap' ...) $ \(m :: 'IntMap' s a) -> doSomethingWith \@s

107+-- 'withIntMap' ('fromIntMap' ...)

108+-- $ \\(m :: 'IntMap' s a) -> doSomethingWith \@s

100109-- @

101110withIntMap :: forall a r. SomeIntMap a -> (forall s. IntMap s a -> r) -> r

102111withIntMap (SomeIntMap m) k = k m

@@ -105,6 +114,14 @@ withIntMap (SomeIntMap m) k = k m

105114fromIntMap :: forall a. IntMap.IntMap a -> SomeIntMap a

106115fromIntMap m = SomeIntMap (IntMap m)

107116

117+-- | Given a set of keys @s@ known ahead of time, verify whether a regular

118+-- 'Data.IntMap.IntMap' has exactly that set of keys.

119+verifyIntMap

120+ :: forall s a. KnownIntSet s => IntMap.IntMap a -> Maybe (IntMap s a)

121+verifyIntMap m

122+ | IntMap.keys m == IntSet.toList (reflect $ Proxy @s) = Just (IntMap m)

123+ | otherwise = Nothing

124+

108125-- | An existential wrapper for an 'IntMap' with an as-yet-unknown set of keys,

109126-- together with a proof of some fact @p@ about the set. Pattern matching on it

110127-- gives you a way to refer to the set (the parameter @s@). Functions that

@@ -234,23 +251,36 @@ disjoint (IntMap m1) (IntMap m2)

234251

235252-- | Given two maps proven to have the same keys, for each key apply the

236253-- function to the associated values, to obtain a new map with the same keys.

237−zipWithKey

238− :: forall s a b c. (Key s -> a -> b -> c)

254+zipWith

255+ :: forall s a b c. (a -> b -> c)

239256 -> IntMap s a

240257 -> IntMap s b

241258 -> IntMap s c

242−zipWithKey f (IntMap m1) (IntMap m2) = IntMap

243− $ IntMap.mergeWithKey (\k x y -> Just $ f (unsafeKey k) x y)

259+zipWith f (IntMap m1) (IntMap m2) = IntMap

260+ $ IntMap.mergeWithKey (\_ x y -> Just $ f x y)

244261 (\m -> if IntMap.null m

245262 then IntMap.empty

246− else error "zipWithKey: bug: Data.IntMap.Refined has been subverted")

263+ else error "zipWith: bug: Data.IntMap.Refined has been subverted")

247264 (\m -> if IntMap.null m

248265 then IntMap.empty

249− else error "zipWithKey: bug: Data.IntMap.Refined has been subverted")

266+ else error "zipWith: bug: Data.IntMap.Refined has been subverted")

250267 -- ^ Work around https://github.com/haskell/containers/issues/979

251268 m1

252269 m2

253270

271+-- | Return the union of two maps. For keys that exist in both maps, the value

272+-- is taken from the first map.

273+--

274+-- @

275+-- 'union' = unionWith 'const'

276+-- @

277+union

278+ :: forall s t a. IntMap s a

279+ -> IntMap t a

280+ -> SomeIntMapWith (UnionProof 'Int s t) a

281+union (IntMap m1) (IntMap m2) = SomeIntMapWith (IntMap $ IntMap.union m1 m2)

282+ $ UnionProof unsafeSubset unsafeSubsetWith2

283+

254284-- | Remove the keys that appear in the second map from the first map.

255285difference

256286 :: forall s t a b. IntMap s a

@@ -260,6 +290,19 @@ difference (IntMap m1) (IntMap m2) = SomeIntMapWith

260290 (IntMap $ IntMap.difference m1 m2)

261291 $ DifferenceProof unsafeSubset (\f g -> unsafeSubsetWith2 f g) unsafeSubset

262292

293+-- | Return the intersection of two maps, taking values from the first map.

294+--

295+-- @

296+-- 'intersection' = intersectionWith 'const'

297+-- @

298+intersection

299+ :: forall s t a b. IntMap s a

300+ -> IntMap t b

301+ -> SomeIntMapWith (IntersectionProof 'Int s t) a

302+intersection (IntMap m1) (IntMap m2) = SomeIntMapWith

303+ (IntMap $ IntMap.intersection m1 m2)

304+ $ IntersectionProof unsafeSubset unsafeSubsetWith2

305+

263306-- | Apply a function to all values in a map, together with their corresponding

264307-- keys, that are proven to be in the map. The set of keys remains the same.

265308mapWithKey :: forall s a b. (Key s -> a -> b) -> IntMap s a -> IntMap s b

@@ -316,6 +359,29 @@ toList = gcoerceWith (unsafeCastKey @s) $ coerce $ IntMap.toAscList @a

316359toDescList :: forall s a. IntMap s a -> [(Key s, a)]

317360toDescList = gcoerceWith (unsafeCastKey @s) $ coerce $ IntMap.toDescList @a

318361

362+-- | Retain only the key-value pairs that satisfy the predicate, returning a

363+-- potentially smaller map.

364+filter

365+ :: forall s a. (a -> Bool)

366+ -> IntMap s a

367+ -> SomeIntMapWith (SupersetProof 'Int s) a

368+filter p (IntMap m) = SomeIntMapWith (IntMap $ IntMap.filter p m)

369+ $ SupersetProof unsafeSubset

370+

371+-- | Retain only the key-value pairs that satisfy the predicate, returning a

372+-- potentially smaller map.

373+filterKeys

374+ :: forall s a. (Key s -> Bool)

375+ -> IntMap s a

376+ -> SomeIntMapWith (SupersetProof 'Int s) a

377+filterKeys p (IntMap m) = SomeIntMapWith

378+#if MIN_VERSION_containers(0, 8, 0)

379+ (IntMap $ IntMap.filterKeys (p . unsafeKey) m)

380+#else

381+ (IntMap $ IntMap.filterWithKey (\k _ -> p (unsafeKey k)) m)

382+#endif

383+ $ SupersetProof unsafeSubset

384+

319385-- | Retain only the key-value pairs that satisfy the predicate, returning a

320386-- potentially smaller map.

321387filterWithKey

@@ -351,6 +417,22 @@ withoutKeys (IntMap m) = SomeIntMapWith

351417#endif

352418 $ DifferenceProof unsafeSubset (\f g -> unsafeSubsetWith2 f g) unsafeSubset

353419

420+-- | Partition a map into two disjoint submaps: those whose values satisfy the

421+-- predicate, and those whose don't.

422+partition

423+ :: forall s a. (a -> Bool)

424+ -> IntMap s a

425+ -> Some2IntMapWith (PartitionProof 'Int s Int) a a

426+partition p (IntMap m) = case IntMap.partition p m of

427+ (m1, m2) -> Some2IntMapWith (IntMap m1) (IntMap m2) $ PartitionProof

428+ do \k -> case IntMap.lookup (unrefine k) m of

429+ Nothing -> error

430+ "partition: bug: Data.IntMap.Refined has been subverted"

431+ Just x -> if p x

432+ then Left $ unsafeKey $ unrefine k

433+ else Right $ unsafeKey $ unrefine k

434+ unsafeSubset unsafeSubsetWith2 \f g -> unsafeSubsetWith2 f g

435+

354436-- | Partition a map into two disjoint submaps: those whose key-value pairs

355437-- satisfy the predicate, and those whose don't.

356438partitionWithKey

@@ -368,6 +450,43 @@ partitionWithKey p (IntMap m)

368450 else Right $ unsafeKey $ unrefine k

369451 unsafeSubset unsafeSubsetWith2 \f g -> unsafeSubsetWith2 f g

370452

453+-- | Take the a submap of keys up to a point where the predicate stops holding.

454+--

455+-- If @p@ is antitone ( $\forall x y, x < y \implies p(x) \ge p(y)$ ), then

456+-- this point is uniquely defined. If @p@ is not antitone, a splitting point is

457+-- chosen in an unspecified way.

458+takeWhileAntitone

459+ :: forall s a. (Key s -> Bool)

460+ -> IntMap s a

461+ -> SomeIntMapWith (SupersetProof 'Int s) a

462+takeWhileAntitone p (IntMap m) = SomeIntMapWith

463+#if MIN_VERSION_containers(0, 6, 7)

464+ (IntMap $ IntMap.takeWhileAntitone (p . unsafeKey) m)

465+#else

466+ (IntMap $ IntMap.fromDistinctAscList

467+ $ List.takeWhile (p . unsafeKey . fst) $ IntMap.toAscList m)

468+#endif

469+ $ SupersetProof unsafeSubset

470+

471+-- | Take the a submap of keys starting from a point where the predicate stops

472+-- holding.

473+--

474+-- If @p@ is antitone ( $\forall x y, x < y \implies p(x) \ge p(y)$ ), then

475+-- this point is uniquely defined. If @p@ is not antitone, a splitting point is

476+-- chosen in an unspecified way.

477+dropWhileAntitone

478+ :: forall s a. (Key s -> Bool)

479+ -> IntMap s a

480+ -> SomeIntMapWith (SupersetProof 'Int s) a

481+dropWhileAntitone p (IntMap m) = SomeIntMapWith

482+#if MIN_VERSION_containers(0, 6, 7)

483+ (IntMap $ IntMap.dropWhileAntitone (p . unsafeKey) m)

484+#else

485+ (IntMap $ IntMap.fromDistinctAscList

486+ $ List.dropWhile (p . unsafeKey . fst) $ IntMap.toAscList m)

487+#endif

488+ $ SupersetProof unsafeSubset

489+

371490-- | Divide a map into two disjoint submaps at a point where the predicate on

372491-- the keys stops holding.

373492--

@@ -442,17 +561,17 @@ castKey

442561castKey = castRefined

443562

444563-- | If keys can be interconverted (e.g. as proved by 'castKey'), then the maps

445−-- can be interconverted too. For example, 'zipWithKey' can be implemented via

446−-- 'Data.IntMap.Refined.intersectionWithKey' by proving that the set of keys

447−-- remains unchanged:

564+-- can be interconverted too. For example, 'Data.IntMap.Refined.zipWithKey' can

565+-- be implemented via 'Data.IntMap.Refined.intersectionWithKey' by proving that

566+-- the set of keys remains unchanged:

448567--

449568-- @

450−-- 'zipWithKey'

569+-- 'Data.IntMap.Refined.zipWithKey'

451570-- :: forall s a b c. ('Key' s -> a -> b -> c)

452571-- -> 'IntMap' s a

453572-- -> 'IntMap' s b

454573-- -> 'IntMap' s c

455−-- 'zipWithKey' f m1 m2

574+-- 'Data.IntMap.Refined.zipWithKey' f m1 m2

456575-- | v'SomeIntMapWith' @r m proof <- 'Data.IntMap.Refined.intersectionWithKey' (f . 'andLeft') m1 m2

457576-- , v'IntersectionProof' p1 p2 <- proof

458577-- , ( v'Coercion' :: t'Coercion' ('IntMap' r c) ('IntMap' s c))

@@ -479,10 +598,10 @@ instance TraversableWithIndex (Key s) (IntMap s) where

479598 itraverse = traverseWithKey

480599

481600-- | Similar to the instance for functions -- zip corresponding keys. To use

482−-- '<*>'/'Control.Applicative.liftA2' without 'KnownIntSet' see 'zipWithKey'.

601+-- '<*>'/'Control.Applicative.liftA2' without 'KnownIntSet' see 'zipWith'.

483602instance KnownIntSet s => Applicative (IntMap s) where

484603 pure x = fromSet \_ -> x

485− (<*>) = zipWithKey (const id)

604+ (<*>) = zipWith id

486605

487606-- | @'bind' m f@ is a map that for each key @k :: 'Key' s@, contains the

488607-- value @f (m '!' k) '!' k@, similar to @'>>='@ for functions.

@@ -502,7 +621,7 @@ instance KnownIntSet s => MonadReader (Key s) (IntMap s) where

502621

503622-- | Append the values at the corresponding keys

504623instance Semigroup a => Semigroup (IntMap s a) where

505− (<>) = zipWithKey (const (<>))

624+ (<>) = zipWith (<>)

506625

507626instance (KnownIntSet s, Monoid a) => Monoid (IntMap s a) where

508627 mempty = fromSet \_ -> mempty

src/Data/IntMap/Refined.hs+225−7

@@ -34,18 +34,26 @@ module Data.IntMap.Refined

3434 , SingletonProof(..)

3535 , fromSet

3636 , Common.fromIntMap

37+ , Common.verifyIntMap

38+ , fromTraversable

39+ , fromTraversableWith

3740 , fromTraversableWithKey

3841 , FromTraversableProof(..)

3942 -- * Insertion

4043 , insert

44+ , insertWith

45+ , insertWithKey

4146 , InsertProof(..)

4247 , reinsert

4348 , insertLookupWithKey

4449 -- * Deletion/Update

4550 , Common.delete

51+ , adjust'

4652 , adjust

4753 , adjustWithKey

54+ , update'

4855 , update

56+ , updateWithKey

4957 , updateLookupWithKey

5058 -- * Query

5159 , Common.lookup

@@ -61,21 +69,29 @@ module Data.IntMap.Refined

6169 , Common.disjoint

6270 , DisjointProof(..)

6371 -- * Combine

72+ , zipWith

6473 , zipWithKey

6574 , bind

75+ , Common.union

76+ , unionWith

6677 , unionWithKey

6778 , UnionProof(..)

6879 , Common.difference

6980 , DifferenceProof(..)

81+ , differenceWith

7082 , differenceWithKey

7183 , PartialDifferenceProof(..)

84+ , Common.intersection

85+ , intersectionWith

7286 , intersectionWithKey

7387 , IntersectionProof(..)

7488 -- * Traversal

89+ , map

7590 , mapWithKey

7691 , traverseWithKey

7792 , mapAccumLWithKey

7893 , mapAccumRWithKey

94+ , mapKeys

7995 , mapKeysWith

8096 , MapProof(..)

8197 , backpermuteKeys

@@ -93,12 +109,19 @@ module Data.IntMap.Refined

93109 -- * Filter

94110 , Common.restrictKeys

95111 , Common.withoutKeys

112+ , Common.filter

113+ , Common.filterKeys

96114 , Common.filterWithKey

115+ , Common.partition

97116 , Common.partitionWithKey

98117 , PartitionProof(..)

118+ , Common.takeWhileAntitone

119+ , Common.dropWhileAntitone

99120 , Common.spanAntitone

100121 , PartialPartitionProof(..)

122+ , mapMaybe

101123 , mapMaybeWithKey

124+ , mapEither

102125 , mapEitherWithKey

103126 , Common.splitLookup

104127 , SplitProof(..)

@@ -122,13 +145,13 @@ import Data.Functor

122145import qualified Data.IntMap as IntMap

123146import Data.IntMap.Common.Refined

124147 ( IntMap(..), Key, unsafeCastKey, unsafeKey, SomeIntMapWith(..)

125− , Some2IntMapWith(..), fromSet, (!), zipWithKey, mapWithKey, traverseWithKey

148+ , Some2IntMapWith(..), fromSet, (!), zipWith, mapWithKey, traverseWithKey

126149 , bind

127150 )

128151import qualified Data.IntMap.Common.Refined as Common

129152import Data.Traversable

130153import Data.Type.Coercion

131−import Prelude hiding (lookup, null)

154+import Prelude hiding (lookup, map, null, zipWith)

132155import Refined

133156import Refined.Unsafe

134157

@@ -139,7 +162,42 @@ singleton :: forall a. Int -> a -> SomeIntMapWith (SingletonProof 'Int Int) a

139162singleton k v = SomeIntMapWith (IntMap $ IntMap.singleton k v)

140163 $ SingletonProof (unsafeKey k)

141164

142−-- | Create a map from an arbitrary traversable of key-value pairs.

165+-- | Create a map from an arbitrary traversable of key-value pairs. If a key is

166+-- repeated, the retained value is the last one in traversal order. If you're

167+-- looking for @fromList@, this is the function you want.

168+fromTraversable

169+ :: forall t a. Traversable t

170+ => t (Int, a) -> SomeIntMapWith (FromTraversableProof 'Int t Int) a

171+fromTraversable xs = SomeIntMapWith (IntMap m) $ FromTraversableProof proof

172+ where

173+ (m, proof) = mapAccumL

174+ (\s (k, v) -> let !s' = IntMap.insert k v s in (s', unsafeKey k))

175+ IntMap.empty

176+ xs

177+

178+-- | Create a map from an arbitrary traversable of key-value pairs, with a

179+-- function for combining values for repeated keys. The function is called as if

180+-- by 'foldl1', but flipped:

181+--

182+-- @

183+-- 'fromTraversableWith' f [(k, x1), (k, x2), (k, x3)]

184+-- = 'singleton' k (f x3 (f x2 x1))

185+-- @

186+fromTraversableWith

187+ :: forall t a. Traversable t

188+ => (a -> a -> a)

189+ -> t (Int, a)

190+ -> SomeIntMapWith (FromTraversableProof 'Int t Int) a

191+fromTraversableWith f xs

192+ = SomeIntMapWith (IntMap m) $ FromTraversableProof proof

193+ where

194+ (m, proof) = mapAccumL

195+ (\s (k, v) -> let !s' = IntMap.insertWith f k v s in (s', unsafeKey k))

196+ IntMap.empty

197+ xs

198+

199+-- | Create a map from an arbitrary traversable of key-value pairs. Like

200+-- 'fromTraversableWith', but the combining function has access to the key.

143201fromTraversableWithKey

144202 :: forall t a. Traversable t

145203 => (Int -> a -> a -> a)

@@ -164,6 +222,33 @@ insert

164222insert k v (IntMap m) = SomeIntMapWith (IntMap $ IntMap.insert k v m)

165223 $ InsertProof (unsafeKey k) unsafeSubset

166224

225+-- | Insert a key-value pair into the map to obtain a potentially larger map,

226+-- guaranteed to contain the given key. If the key was already present, the

227+-- supplied function is used to combine the new value with the old (in that

228+-- order).

229+insertWith

230+ :: forall s a. (a -> a -> a)

231+ -> Int

232+ -> a

233+ -> IntMap s a

234+ -> SomeIntMapWith (InsertProof 'Int Int s) a

235+insertWith f k v (IntMap m) = SomeIntMapWith

236+ (IntMap $ IntMap.insertWith f k v m)

237+ $ InsertProof (unsafeKey k) unsafeSubset

238+

239+-- | Insert a key-value pair into the map to obtain a potentially larger map,

240+-- guaranteed to contain the given key. Like 'insertWith', but the combining

241+-- function has access to the key, which is guaranteed to be in the old map.

242+insertWithKey

243+ :: forall s a. (Key s -> a -> a -> a)

244+ -> Int

245+ -> a

246+ -> IntMap s a

247+ -> SomeIntMapWith (InsertProof 'Int Int s) a

248+insertWithKey f k v (IntMap m) = SomeIntMapWith

249+ (IntMap $ IntMap.insertWithKey (f . unsafeKey) k v m)

250+ $ InsertProof (unsafeKey k) unsafeSubset

251+

167252-- | Overwrite a key-value pair that is known to already be in the map. The set

168253-- of keys remains the same.

169254reinsert

@@ -184,10 +269,19 @@ insertLookupWithKey f k v (IntMap m)

184269 (v', !m') -> ((unsafeKey k,) <$> v',)

185270 $ SomeIntMapWith (IntMap m') $ InsertProof (unsafeKey k) unsafeSubset

186271

272+-- | If the given key is in the map, update the value at that key using the

273+-- given function. In any case, the set of keys remains the same.

274+adjust' :: forall s a. (a -> a) -> Int -> IntMap s a -> IntMap s a

275+adjust' = coerce $ IntMap.adjust @a

276+

187277-- | Update the value at a specific key known the be in the map using the given

188278-- function. The set of keys remains the same.

279+--

280+-- @

281+-- 'reinsert' k v = 'adjust (const v) k'

282+-- @

189283adjust :: forall s a. (a -> a) -> Key s -> IntMap s a -> IntMap s a

190−adjust = gcoerceWith (unsafeCastKey @s) $ coerce $ IntMap.adjust @a

284+adjust = gcoerceWith (unsafeCastKey @s) $ coerce $ adjust' @s @a

191285

192286-- | If the given key is in the map, update the associated value using the given

193287-- function with a proof that the key was in the map; otherwise return the map

@@ -197,6 +291,16 @@ adjustWithKey

197291adjustWithKey = gcoerceWith (unsafeCastKey @s) $ coerce

198292 $ IntMap.adjustWithKey @a

199293

294+-- | If a key is present in the map, update its value or delete it using the

295+-- given function, returning a potentially smaller map.

296+update'

297+ :: forall s a. (a -> Maybe a)

298+ -> Int

299+ -> IntMap s a

300+ -> SomeIntMapWith (SupersetProof 'Int s) a

301+update' f k (IntMap m) = SomeIntMapWith (IntMap $ IntMap.update f k m)

302+ $ SupersetProof unsafeSubset

303+

200304-- | Update or delete a key known to be in the map using the given function,

201305-- returning a potentially smaller map.

202306update

@@ -204,7 +308,18 @@ update

204308 -> Key s

205309 -> IntMap s a

206310 -> SomeIntMapWith (SupersetProof 'Int s) a

207−update f k (IntMap m) = SomeIntMapWith (IntMap $ IntMap.update f (unrefine k) m)

311+update = gcoerceWith (unsafeCastKey @s) $ coerce $ update' @s @a

312+

313+-- | If a key is present in the map, update its value or delete it using the

314+-- given function with a proof that the key was in the map, returning a

315+-- potentially smaller map.

316+updateWithKey

317+ :: forall s a. (Key s -> a -> Maybe a)

318+ -> Int

319+ -> IntMap s a

320+ -> SomeIntMapWith (SupersetProof 'Int s) a

321+updateWithKey f k (IntMap m) = SomeIntMapWith

322+ (IntMap $ IntMap.updateWithKey (f . unsafeKey) k m)

208323 $ SupersetProof unsafeSubset

209324

210325-- | If the given key is in the map, update or delete it using the given

@@ -221,6 +336,37 @@ updateLookupWithKey f k (IntMap m)

221336 (v', !m') -> ((unsafeKey k,) <$> v',)

222337 $ SomeIntMapWith (IntMap m') $ SupersetProof unsafeSubset

223338

339+-- | Given two maps proven to have the same keys, for each key apply the

340+-- function to the associated values and the key, to obtain a new map with the

341+-- same keys.

342+zipWithKey

343+ :: forall s a b c. (Key s -> a -> b -> c)

344+ -> IntMap s a

345+ -> IntMap s b

346+ -> IntMap s c

347+zipWithKey f (IntMap m1) (IntMap m2) = IntMap

348+ $ IntMap.mergeWithKey (\k x y -> Just $ f (unsafeKey k) x y)

349+ (\m -> if IntMap.null m

350+ then IntMap.empty

351+ else error "zipWithKey: bug: Data.IntMap.Refined has been subverted")

352+ (\m -> if IntMap.null m

353+ then IntMap.empty

354+ else error "zipWithKey: bug: Data.IntMap.Refined has been subverted")

355+ -- ^ Work around https://github.com/haskell/containers/issues/979

356+ m1

357+ m2

358+

359+-- | Return the union of two maps, with a given combining function for keys that

360+-- exist in both maps simultaneously.

361+unionWith

362+ :: forall s t a. (a -> a -> a)

363+ -> IntMap s a

364+ -> IntMap t a

365+ -> SomeIntMapWith (UnionProof 'Int s t) a

366+unionWith f (IntMap m1) (IntMap m2) = SomeIntMapWith

367+ (IntMap $ IntMap.unionWith f m1 m2)

368+ $ UnionProof unsafeSubset unsafeSubsetWith2

369+

224370-- | Return the union of two maps, with a given combining function for keys that

225371-- exist in both maps simultaneously.

226372--

@@ -235,8 +381,19 @@ unionWithKey f (IntMap m1) (IntMap m2)

235381 = SomeIntMapWith (IntMap $ IntMap.unionWithKey (f . reallyUnsafeRefine) m1 m2)

236382 $ UnionProof unsafeSubset unsafeSubsetWith2

237383

238−-- | For keys that appear in both maps, the given function decides whether the

239−-- key is removed from the first map.

384+-- | Return the first map, but for keys that appear in both maps, the given

385+-- function decides whether the key is removed.

386+differenceWith

387+ :: forall s t a b. (a -> b -> Maybe a)

388+ -> IntMap s a

389+ -> IntMap t b

390+ -> SomeIntMapWith (PartialDifferenceProof 'Int s t) a

391+differenceWith f (IntMap m1) (IntMap m2) = SomeIntMapWith

392+ (IntMap $ IntMap.differenceWith f m1 m2)

393+ $ PartialDifferenceProof unsafeSubset unsafeSubset

394+

395+-- | Return the first map, but for keys that appear in both maps, the given

396+-- function decides whether the key is removed.

240397--

241398-- You can use 'andLeft' and 'andRight' to obtain @'Key' s@ and @'Key' t@

242399-- respectively.

@@ -252,6 +409,16 @@ differenceWithKey f (IntMap m1) (IntMap m2) = SomeIntMapWith

252409 (IntMap $ IntMap.differenceWithKey (f . reallyUnsafeRefine) m1 m2)

253410 $ PartialDifferenceProof unsafeSubset unsafeSubset

254411

412+-- | Return the intersection of two maps with the given combining function.

413+intersectionWith

414+ :: forall s t a b c. (a -> b -> c)

415+ -> IntMap s a

416+ -> IntMap t b

417+ -> SomeIntMapWith (IntersectionProof 'Int s t) c

418+intersectionWith f (IntMap m1) (IntMap m2) = SomeIntMapWith

419+ (IntMap $ IntMap.intersectionWith f m1 m2)

420+ $ IntersectionProof unsafeSubset unsafeSubsetWith2

421+

255422-- | Return the intersection of two maps with the given combining function.

256423--

257424-- You can use 'andLeft' and 'andRight' to obtain @'Key' s@ and @'Key' t@

@@ -268,6 +435,10 @@ intersectionWithKey f (IntMap m1) (IntMap m2) = SomeIntMapWith

268435 (IntMap $ IntMap.intersectionWithKey (f . reallyUnsafeRefine) m1 m2)

269436 $ IntersectionProof unsafeSubset unsafeSubsetWith2

270437

438+-- | Apply a function to all values in a map. The set of keys remains the same.

439+map :: forall s a b. (a -> b) -> IntMap s a -> IntMap s b

440+map = coerce $ IntMap.map @a @b

441+

271442-- | Thread an accumularing argument through the map in ascending order of keys.

272443mapAccumLWithKey

273444 :: forall s a b c. (a -> Key s -> b -> (a, c))

@@ -287,6 +458,27 @@ mapAccumRWithKey

287458mapAccumRWithKey = gcoerceWith (unsafeCastKey @s) $ coerce

288459 $ IntMap.mapAccumRWithKey @a @b @c

289460

461+-- | @'mapKeys' f m@ applies @f@ to each key of @m@ and collects the results

462+-- into a new map. For keys that were mapped to the same new key, the value

463+-- corresponding to the greatest of the original keys is retained.

464+mapKeys

465+ :: forall s a. (Key s -> Int)

466+ -> IntMap s a

467+ -> SomeIntMapWith (MapProof 'Int s Int Int) a

468+mapKeys g (IntMap m)

469+ = SomeIntMapWith (IntMap $ IntMap.mapKeys (g . unsafeKey) m)

470+ $ MapProof (unsafeKey . g) \k2 ->

471+ case IntMap.lookup (unrefine k2) backMap of

472+ Nothing -> error

473+ "mapKeys: bug: Data.IntMap.Refined has been subverted"

474+ Just k1 -> k1

475+ where

476+ ~backMap = IntMap.fromList

477+ [ (k2, unsafeKey k1)

478+ | k1 <- IntMap.keys m

479+ , let !k2 = g $ unsafeKey k1

480+ ]

481+

290482-- | @'mapKeysWith' c f m@ applies @f@ to each key of @m@ and collects the

291483-- results into a new map. For keys that were mapped to the same new key, @c@

292484-- acts as the combining function for corresponding values.

@@ -309,6 +501,15 @@ mapKeysWith f g (IntMap m)

309501 , let !k2 = g $ unsafeKey k1

310502 ]

311503

504+-- | Apply a function to all values in a map and collect only the 'Just'

505+-- results, returning a potentially smaller map.

506+mapMaybe

507+ :: forall s a b. (a -> Maybe b)

508+ -> IntMap s a

509+ -> SomeIntMapWith (SupersetProof 'Int s) b

510+mapMaybe f (IntMap m) = SomeIntMapWith (IntMap $ IntMap.mapMaybe f m)

511+ $ SupersetProof unsafeSubset

512+

312513-- | Apply a function to all values in a map, together with their corresponding

313514-- keys, and collect only the 'Just' results, returning a potentially smaller

314515-- map.

@@ -320,6 +521,23 @@ mapMaybeWithKey f (IntMap m)

320521 = SomeIntMapWith (IntMap $ IntMap.mapMaybeWithKey (f . unsafeKey) m)

321522 $ SupersetProof unsafeSubset

322523

524+-- | Apply a function to all values in a map and collect the 'Left' and 'Right'

525+-- results into separate (disjoint) maps.

526+mapEither

527+ :: forall s a b c. (a -> Either b c)

528+ -> IntMap s a

529+ -> Some2IntMapWith (PartitionProof 'Int s Int) b c

530+mapEither p (IntMap m)

531+ = case IntMap.mapEither p m of

532+ (m1, m2) -> Some2IntMapWith (IntMap m1) (IntMap m2) $ PartitionProof

533+ do \k -> case IntMap.lookup (unrefine k) m of

534+ Nothing -> error

535+ "mapEither: bug: Data.IntMap.Refined has been subverted"

536+ Just x -> case p x of

537+ Left _ -> Left $ unsafeKey $ unrefine k

538+ Right _ -> Right $ unsafeKey $ unrefine k

539+ unsafeSubset unsafeSubsetWith2 \f g -> unsafeSubsetWith2 f g

540+

323541-- | Apply a function to all values in a map, together with their corresponding

324542-- keys, and collect the 'Left' and 'Right' results into separate (disjoint)

325543-- maps.

src/Data/IntMap/Strict/Refined.hs+229−9

@@ -34,18 +34,26 @@ module Data.IntMap.Strict.Refined

3434 , SingletonProof(..)

3535 , fromSet

3636 , Common.fromIntMap

37+ , Common.verifyIntMap

38+ , fromTraversable

39+ , fromTraversableWith

3740 , fromTraversableWithKey

3841 , FromTraversableProof(..)

3942 -- * Insertion

4043 , insert

44+ , insertWith

45+ , insertWithKey

4146 , InsertProof(..)

4247 , reinsert

4348 , insertLookupWithKey

4449 -- * Deletion/Update

4550 , Common.delete

51+ , adjust'

4652 , adjust

4753 , adjustWithKey

54+ , update'

4855 , update

56+ , updateWithKey

4957 , updateLookupWithKey

5058 -- * Query

5159 , Common.lookup

@@ -61,21 +69,29 @@ module Data.IntMap.Strict.Refined

6169 , Common.disjoint

6270 , DisjointProof(..)

6371 -- * Combine

72+ , zipWith

6473 , zipWithKey

6574 , bind

75+ , Common.union

76+ , unionWith

6677 , unionWithKey

6778 , UnionProof(..)

6879 , Common.difference

6980 , DifferenceProof(..)

81+ , differenceWith

7082 , differenceWithKey

7183 , PartialDifferenceProof(..)

84+ , Common.intersection

85+ , intersectionWith

7286 , intersectionWithKey

7387 , IntersectionProof(..)

7488 -- * Traversal

89+ , map

7590 , mapWithKey

7691 , traverseWithKey

7792 , mapAccumLWithKey

7893 , mapAccumRWithKey

94+ , mapKeys

7995 , mapKeysWith

8096 , MapProof(..)

8197 , backpermuteKeys

@@ -93,12 +109,19 @@ module Data.IntMap.Strict.Refined

93109 -- * Filter

94110 , Common.restrictKeys

95111 , Common.withoutKeys

112+ , Common.filter

113+ , Common.filterKeys

96114 , Common.filterWithKey

115+ , Common.partition

97116 , Common.partitionWithKey

98117 , PartitionProof(..)

118+ , Common.takeWhileAntitone

119+ , Common.dropWhileAntitone

99120 , Common.spanAntitone

100121 , PartialPartitionProof(..)

122+ , mapMaybe

101123 , mapMaybeWithKey

124+ , mapEither

102125 , mapEitherWithKey

103126 , Common.splitLookup

104127 , SplitProof(..)

@@ -129,7 +152,7 @@ import Data.Proxy

129152import Data.Reflection

130153import Data.Traversable

131154import Data.Type.Coercion

132−import Prelude hiding (lookup, null)

155+import Prelude hiding (lookup, map, null, zipWith)

133156import Refined

134157import Refined.Unsafe

135158

@@ -145,17 +168,52 @@ singleton k v = SomeIntMapWith (IntMap $ IntMap.singleton k v)

145168fromSet :: forall s a. KnownIntSet s => (Key s -> a) -> IntMap s a

146169fromSet f = IntMap $ IntMap.fromSet (f . unsafeKey) (reflect $ Proxy @s)

147170

148−-- | Create a map from an arbitrary traversable of key-value pairs.

171+-- | Create a map from an arbitrary traversable of key-value pairs. If a key is

172+-- repeated, the retained value is the last one in traversal order. If you're

173+-- looking for @fromList@, this is the function you want.

174+fromTraversable

175+ :: forall t a. Traversable t

176+ => t (Int, a) -> SomeIntMapWith (FromTraversableProof 'Int t Int) a

177+fromTraversable xs = SomeIntMapWith (IntMap m) $ FromTraversableProof proof

178+ where

179+ (m, proof) = mapAccumL

180+ (\s (k, v) -> let !s' = IntMap.insert k v s in (s', unsafeKey k))

181+ IntMap.empty

182+ xs

183+

184+-- | Create a map from an arbitrary traversable of key-value pairs, with a

185+-- function for combining values for repeated keys. The function is called as if

186+-- by 'foldl1', but flipped:

187+--

188+-- @

189+-- 'fromTraversableWith' f [(k, x1), (k, x2), (k, x3)]

190+-- = 'singleton' k (f x3 (f x2 x1))

191+-- @

192+fromTraversableWith

193+ :: forall t a. Traversable t

194+ => (a -> a -> a)

195+ -> t (Int, a)

196+ -> SomeIntMapWith (FromTraversableProof 'Int t Int) a

197+fromTraversableWith f xs

198+ = SomeIntMapWith (IntMap m) $ FromTraversableProof proof

199+ where

200+ (m, proof) = mapAccumL

201+ (\s (k, v) -> let !s' = IntMap.insertWith f k v s in (s', unsafeKey k))

202+ IntMap.empty

203+ xs

204+

205+-- | Create a map from an arbitrary traversable of key-value pairs. Like

206+-- 'fromTraversableWith', but the combining function has access to the key.

149207fromTraversableWithKey

150208 :: forall t a. Traversable t

151209 => (Int -> a -> a -> a)

152210 -> t (Int, a)

153211 -> SomeIntMapWith (FromTraversableProof 'Int t Int) a

154−fromTraversableWithKey f xs = SomeIntMapWith (IntMap m)

155− $ FromTraversableProof proof

212+fromTraversableWithKey f xs

213+ = SomeIntMapWith (IntMap m) $ FromTraversableProof proof

156214 where

157215 (m, proof) = mapAccumL

158− (\s (k, v) -> (IntMap.insertWithKey f k v s, unsafeKey k))

216+ (\s (k, v) -> let !s' = IntMap.insertWithKey f k v s in (s', unsafeKey k))

159217 IntMap.empty

160218 xs

161219

@@ -170,8 +228,39 @@ insert

170228insert k v (IntMap m) = SomeIntMapWith (IntMap $ IntMap.insert k v m)

171229 $ InsertProof (unsafeKey k) unsafeSubset

172230

231+-- | Insert a key-value pair into the map to obtain a potentially larger map,

232+-- guaranteed to contain the given key. If the key was already present, the

233+-- supplied function is used to combine the new value with the old (in that

234+-- order).

235+insertWith

236+ :: forall s a. (a -> a -> a)

237+ -> Int

238+ -> a

239+ -> IntMap s a

240+ -> SomeIntMapWith (InsertProof 'Int Int s) a

241+insertWith f k v (IntMap m) = SomeIntMapWith

242+ (IntMap $ IntMap.insertWith f k v m)

243+ $ InsertProof (unsafeKey k) unsafeSubset

244+

245+-- | Insert a key-value pair into the map to obtain a potentially larger map,

246+-- guaranteed to contain the given key. Like 'insertWith', but the combining

247+-- function has access to the key, which is guaranteed to be in the old map.

248+insertWithKey

249+ :: forall s a. (Key s -> a -> a -> a)

250+ -> Int

251+ -> a

252+ -> IntMap s a

253+ -> SomeIntMapWith (InsertProof 'Int Int s) a

254+insertWithKey f k v (IntMap m) = SomeIntMapWith

255+ (IntMap $ IntMap.insertWithKey (f . unsafeKey) k v m)

256+ $ InsertProof (unsafeKey k) unsafeSubset

257+

173258-- | Overwrite a key-value pair that is known to already be in the map. The set

174259-- of keys remains the same.

260+--

261+-- @

262+-- 'reinsert' k v = 'adjust (const v) k'

263+-- @

175264reinsert

176265 :: forall s a. Key s -> a -> IntMap s a -> IntMap s a

177266reinsert = gcoerceWith (unsafeCastKey @s) $ coerce $ IntMap.insert @a

@@ -190,10 +279,15 @@ insertLookupWithKey f k v (IntMap m)

190279 (v', !m') -> ((unsafeKey k,) <$> v',)

191280 $ SomeIntMapWith (IntMap m') $ InsertProof (unsafeKey k) unsafeSubset

192281

282+-- | If the given key is in the map, update the value at that key using the

283+-- given function. In any case, the set of keys remains the same.

284+adjust' :: forall s a. (a -> a) -> Int -> IntMap s a -> IntMap s a

285+adjust' = coerce $ IntMap.adjust @a

286+

193287-- | Update the value at a specific key known the be in the map using the given

194288-- function. The set of keys remains the same.

195289adjust :: forall s a. (a -> a) -> Key s -> IntMap s a -> IntMap s a

196−adjust = gcoerceWith (unsafeCastKey @s) $ coerce $ IntMap.adjust @a

290+adjust = gcoerceWith (unsafeCastKey @s) $ coerce $ adjust' @s @a

197291

198292-- | If the given key is in the map, update the associated value using the given

199293-- function with a proof that the key was in the map; otherwise return the map

@@ -203,6 +297,16 @@ adjustWithKey

203297adjustWithKey = gcoerceWith (unsafeCastKey @s) $ coerce

204298 $ IntMap.adjustWithKey @a

205299

300+-- | If a key is present in the map, update its value or delete it using the

301+-- given function, returning a potentially smaller map.

302+update'

303+ :: forall s a. (a -> Maybe a)

304+ -> Int

305+ -> IntMap s a

306+ -> SomeIntMapWith (SupersetProof 'Int s) a

307+update' f k (IntMap m) = SomeIntMapWith (IntMap $ IntMap.update f k m)

308+ $ SupersetProof unsafeSubset

309+

206310-- | Update or delete a key known to be in the map using the given function,

207311-- returning a potentially smaller map.

208312update

@@ -210,7 +314,18 @@ update

210314 -> Key s

211315 -> IntMap s a

212316 -> SomeIntMapWith (SupersetProof 'Int s) a

213−update f k (IntMap m) = SomeIntMapWith (IntMap $ IntMap.update f (unrefine k) m)

317+update = gcoerceWith (unsafeCastKey @s) $ coerce $ update' @s @a

318+

319+-- | If a key is present in the map, update its value or delete it using the

320+-- given function with a proof that the key was in the map, returning a

321+-- potentially smaller map.

322+updateWithKey

323+ :: forall s a. (Key s -> a -> Maybe a)

324+ -> Int

325+ -> IntMap s a

326+ -> SomeIntMapWith (SupersetProof 'Int s) a

327+updateWithKey f k (IntMap m) = SomeIntMapWith

328+ (IntMap $ IntMap.updateWithKey (f . unsafeKey) k m)

214329 $ SupersetProof unsafeSubset

215330

216331-- | If the given key is in the map, update or delete it using the given

@@ -229,6 +344,28 @@ updateLookupWithKey f k (IntMap m)

229344

230345-- | Given two maps proven to have the same keys, for each key apply the

231346-- function to the associated values, to obtain a new map with the same keys.

347+zipWith

348+ :: forall s a b c. (a -> b -> c)

349+ -> IntMap s a

350+ -> IntMap s b

351+ -> IntMap s c

352+zipWith f (IntMap m1) (IntMap m2) = IntMap

353+ $ IntMap.mergeWithKey (\_ x y -> Just $ f x y)

354+ (\m -> if IntMap.null m

355+ then IntMap.empty

356+ else

357+ error "zipWith: bug: Data.IntMap.Strict.Refined has been subverted")

358+ (\m -> if IntMap.null m

359+ then IntMap.empty

360+ else

361+ error "zipWith: bug: Data.IntMap.Strict.Refined has been subverted")

362+ -- ^ Work around https://github.com/haskell/containers/issues/979

363+ m1

364+ m2

365+

366+-- | Given two maps proven to have the same keys, for each key apply the

367+-- function to the associated values and the key, to obtain a new map with the

368+-- same keys.

232369zipWithKey

233370 :: forall s a b c. (Key s -> a -> b -> c)

234371 -> IntMap s a

@@ -248,6 +385,17 @@ zipWithKey f (IntMap m1) (IntMap m2) = IntMap

248385 m1

249386 m2

250387

388+-- | Return the union of two maps, with a given combining function for keys that

389+-- exist in both maps simultaneously.

390+unionWith

391+ :: forall s t a. (a -> a -> a)

392+ -> IntMap s a

393+ -> IntMap t a

394+ -> SomeIntMapWith (UnionProof 'Int s t) a

395+unionWith f (IntMap m1) (IntMap m2) = SomeIntMapWith

396+ (IntMap $ IntMap.unionWith f m1 m2)

397+ $ UnionProof unsafeSubset unsafeSubsetWith2

398+

251399-- | Return the union of two maps, with a given combining function for keys that

252400-- exist in both maps simultaneously.

253401--

@@ -262,8 +410,19 @@ unionWithKey f (IntMap m1) (IntMap m2)

262410 = SomeIntMapWith (IntMap $ IntMap.unionWithKey (f . reallyUnsafeRefine) m1 m2)

263411 $ UnionProof unsafeSubset unsafeSubsetWith2

264412

265−-- | For keys that appear in both maps, the given function decides whether the

266−-- key is removed from the first map.

413+-- | Return the first map, but for keys that appear in both maps, the given

414+-- function decides whether the key is removed.

415+differenceWith

416+ :: forall s t a b. (a -> b -> Maybe a)

417+ -> IntMap s a

418+ -> IntMap t b

419+ -> SomeIntMapWith (PartialDifferenceProof 'Int s t) a

420+differenceWith f (IntMap m1) (IntMap m2) = SomeIntMapWith

421+ (IntMap $ IntMap.differenceWith f m1 m2)

422+ $ PartialDifferenceProof unsafeSubset unsafeSubset

423+

424+-- | Return the first map, but for keys that appear in both maps, the given

425+-- function decides whether the key is removed.

267426--

268427-- You can use 'andLeft' and 'andRight' to obtain @'Key' s@ and @'Key' t@

269428-- respectively.

@@ -279,6 +438,16 @@ differenceWithKey f (IntMap m1) (IntMap m2) = SomeIntMapWith

279438 (IntMap $ IntMap.differenceWithKey (f . reallyUnsafeRefine) m1 m2)

280439 $ PartialDifferenceProof unsafeSubset unsafeSubset

281440

441+-- | Return the intersection of two maps with the given combining function.

442+intersectionWith

443+ :: forall s t a b c. (a -> b -> c)

444+ -> IntMap s a

445+ -> IntMap t b

446+ -> SomeIntMapWith (IntersectionProof 'Int s t) c

447+intersectionWith f (IntMap m1) (IntMap m2) = SomeIntMapWith

448+ (IntMap $ IntMap.intersectionWith f m1 m2)

449+ $ IntersectionProof unsafeSubset unsafeSubsetWith2

450+

282451-- | Return the intersection of two maps with the given combining function.

283452--

284453-- You can use 'andLeft' and 'andRight' to obtain @'Key' s@ and @'Key' t@

@@ -295,6 +464,10 @@ intersectionWithKey f (IntMap m1) (IntMap m2) = SomeIntMapWith

295464 (IntMap $ IntMap.intersectionWithKey (f . reallyUnsafeRefine) m1 m2)

296465 $ IntersectionProof unsafeSubset unsafeSubsetWith2

297466

467+-- | Apply a function to all values in a map. The set of keys remains the same.

468+map :: forall s a b. (a -> b) -> IntMap s a -> IntMap s b

469+map = coerce $ IntMap.map @a @b

470+

298471-- | Apply a function to all values in a map, together with their corresponding

299472-- keys, that are proven to be in the map. The set of keys remains the same.

300473mapWithKey :: forall s a b. (Key s -> a -> b) -> IntMap s a -> IntMap s b

@@ -328,6 +501,27 @@ mapAccumRWithKey

328501mapAccumRWithKey = gcoerceWith (unsafeCastKey @s) $ coerce

329502 $ IntMap.mapAccumRWithKey @a @b @c

330503

504+-- | @'mapKeys' f m@ applies @f@ to each key of @m@ and collects the results

505+-- into a new map. For keys that were mapped to the same new key, the value

506+-- corresponding to the greatest of the original keys is retained.

507+mapKeys

508+ :: forall s a. (Key s -> Int)

509+ -> IntMap s a

510+ -> SomeIntMapWith (MapProof 'Int s Int Int) a

511+mapKeys g (IntMap m)

512+ = SomeIntMapWith (IntMap $ IntMap.mapKeys (g . unsafeKey) m)

513+ $ MapProof (unsafeKey . g) \k2 ->

514+ case IntMap.lookup (unrefine k2) backMap of

515+ Nothing -> error

516+ "mapKeys: bug: Data.IntMap.Strict.Refined has been subverted"

517+ Just k1 -> k1

518+ where

519+ ~backMap = IntMap.fromList

520+ [ (k2, unsafeKey k1)

521+ | k1 <- IntMap.keys m

522+ , let !k2 = g $ unsafeKey k1

523+ ]

524+

331525-- | @'mapKeysWith' c f m@ applies @f@ to each key of @m@ and collects the

332526-- results into a new map. For keys that were mapped to the same new key, @c@

333527-- acts as the combining function for corresponding values.

@@ -350,6 +544,15 @@ mapKeysWith f g (IntMap m)

350544 , let !k2 = g $ unsafeKey k1

351545 ]

352546

547+-- | Apply a function to all values in a map and collect only the 'Just'

548+-- results, returning a potentially smaller map.

549+mapMaybe

550+ :: forall s a b. (a -> Maybe b)

551+ -> IntMap s a

552+ -> SomeIntMapWith (SupersetProof 'Int s) b

553+mapMaybe f (IntMap m) = SomeIntMapWith (IntMap $ IntMap.mapMaybe f m)

554+ $ SupersetProof unsafeSubset

555+

353556-- | Apply a function to all values in a map, together with their corresponding

354557-- keys, and collect only the 'Just' results, returning a potentially smaller

355558-- map.

@@ -361,6 +564,23 @@ mapMaybeWithKey f (IntMap m)

361564 = SomeIntMapWith (IntMap $ IntMap.mapMaybeWithKey (f . unsafeKey) m)

362565 $ SupersetProof unsafeSubset

363566

567+-- | Apply a function to all values in a map and collect the 'Left' and 'Right'

568+-- results into separate (disjoint) maps.

569+mapEither

570+ :: forall s a b c. (a -> Either b c)

571+ -> IntMap s a

572+ -> Some2IntMapWith (PartitionProof 'Int s Int) b c

573+mapEither p (IntMap m)

574+ = case IntMap.mapEither p m of

575+ (m1, m2) -> Some2IntMapWith (IntMap m1) (IntMap m2) $ PartitionProof

576+ do \k -> case IntMap.lookup (unrefine k) m of

577+ Nothing -> error

578+ "mapEither: bug: Data.IntMap.Refined has been subverted"

579+ Just x -> case p x of

580+ Left _ -> Left $ unsafeKey $ unrefine k

581+ Right _ -> Right $ unsafeKey $ unrefine k

582+ unsafeSubset unsafeSubsetWith2 \f g -> unsafeSubsetWith2 f g

583+

364584-- | Apply a function to all values in a map, together with their corresponding

365585-- keys, and collect the 'Left' and 'Right' results into separate (disjoint)

366586-- maps.

src/Data/IntSet/Refined.hs+1−1

@@ -169,7 +169,7 @@ data SomeIntSet where

169169-- you a way to refer to the set (the parameter @s@), e.g.:

170170--

171171-- @

172−-- 'withIntSet' ('fromIntSet' ...) $ \(_ :: 'Proxy' s) -> doSomethingWith \@s

172+-- 'withIntSet' ('fromIntSet' ...) $ \\(_ :: 'Proxy' s) -> doSomethingWith \@s

173173-- @

174174withIntSet

175175 :: forall r. SomeIntSet -> (forall s. KnownIntSet s => Proxy s -> r) -> r

src/Data/Map/Common/Refined.hs+141−15

@@ -16,13 +16,19 @@ import qualified Data.Hashable as Hashable

1616import qualified Data.Map as Map

1717import Data.Proxy

1818import Data.Reflection

19+import qualified Data.Set as Set

1920import Data.Traversable.WithIndex

2021import Data.Type.Coercion

2122import Data.Type.Equality ((:~:)(..))

23+import Prelude hiding (zipWith)

2224import Refined

2325import Refined.Unsafe

2426import Unsafe.Coerce

2527

28+#if MIN_VERSION_containers(0, 6, 3)

29+import Data.Bifoldable

30+#endif

31+

2632#if MIN_VERSION_containers(0, 6, 2)

2733#elif MIN_VERSION_containers(0, 5, 8)

2834import Data.Functor.Const (Const(..))

@@ -33,6 +39,10 @@ import qualified Data.List as List

3339import qualified Data.Map.Strict as MapStrict

3440#endif

3541

42+#if MIN_VERSION_containers(0, 5, 9) || MIN_VERSION_hashable(1, 4, 0)

43+import Data.Functor.Classes

44+#endif

45+

3646

3747-- | A wrapper around a regular 'Data.Map.Map' with a type parameter @s@

3848-- identifying the set of keys present in the map.

@@ -49,6 +59,12 @@ newtype Map s k a = Map (Map.Map k a)

4959 deriving newtype (Eq, Ord, Show, Functor, Foldable, NFData)

5060#if MIN_VERSION_hashable(1, 3, 4)

5161 deriving newtype (Hashable.Hashable)

62+#endif

63+#if MIN_VERSION_containers(0, 6, 3)

64+ deriving newtype (Bifoldable)

65+#endif

66+#if MIN_VERSION_containers(0, 5, 9) || MIN_VERSION_hashable(1, 4, 0)

67+ deriving newtype (Eq1, Eq2, Ord1, Ord2, Show1, Show2)

5268#endif

5369 deriving stock (Traversable)

5470type role Map nominal nominal representational

@@ -94,7 +110,7 @@ data SomeMap k a where

94110-- parameter @s@), e.g.:

95111--

96112-- @

97−-- 'withMap' ('fromMap' ...) $ \(m :: 'Map' s k a) -> doSomethingWith \@s

113+-- 'withMap' ('fromMap' ...) $ \\(m :: 'Map' s k a) -> doSomethingWith \@s

98114-- @

99115withMap :: forall k a r. SomeMap k a -> (forall s. Map s k a -> r) -> r

100116withMap (SomeMap m) k = k m

@@ -103,6 +119,14 @@ withMap (SomeMap m) k = k m

103119fromMap :: forall k a. Map.Map k a -> SomeMap k a

104120fromMap m = SomeMap (Map m)

105121

122+-- | Given a set of keys @s@ known ahead of time, verify whether a regular

123+-- 'Data.Map.Map' has exactly that set of keys.

124+verifyMap

125+ :: forall s k a. (Eq k, KnownSet s k) => Map.Map k a -> Maybe (Map s k a)

126+verifyMap m

127+ | Map.keys m == Set.toList (reflect $ Proxy @s) = Just (Map m)

128+ | otherwise = Nothing

129+

106130-- | An existential wrapper for a 'Map' with an as-yet-unknown set of keys,

107131-- together with a proof of some fact @p@ about the set. Pattern matching on it

108132-- gives you a way to refer to the set (the parameter @s@). Functions that

@@ -236,21 +260,33 @@ disjoint (Map m1) (Map m2)

236260

237261-- | Given two maps proven to have the same keys, for each key apply the

238262-- function to the associated values, to obtain a new map with the same keys.

239−zipWithKey

263+zipWith

240264 :: forall s k a b c. Ord k

241− => (Key s k -> a -> b -> c) -> Map s k a -> Map s k b -> Map s k c

242−zipWithKey f (Map m1) (Map m2) = Map

243− $ Map.mergeWithKey (\k x y -> Just $ f (unsafeKey k) x y)

265+ => (a -> b -> c) -> Map s k a -> Map s k b -> Map s k c

266+zipWith f (Map m1) (Map m2) = Map

267+ $ Map.mergeWithKey (\_ x y -> Just $ f x y)

244268 (\m -> if Map.null m

245269 then Map.empty

246− else error "zipWithKey: bug: Data.Map.Refined has been subverted")

270+ else error "zipWith: bug: Data.Map.Refined has been subverted")

247271 (\m -> if Map.null m

248272 then Map.empty

249− else error "zipWithKey: bug: Data.Map.Refined has been subverted")

273+ else error "zipWith: bug: Data.Map.Refined has been subverted")

250274 -- ^ Work around https://github.com/haskell/containers/issues/979

251275 m1

252276 m2

253277

278+-- | Return the union of two maps. For keys that exist in both maps, the value

279+-- is taken from the first map.

280+--

281+-- @

282+-- 'union' = unionWith 'const'

283+-- @

284+union

285+ :: forall s t k a. Ord k

286+ => Map s k a -> Map t k a -> SomeMapWith (UnionProof 'Regular s t) k a

287+union (Map m1) (Map m2) = SomeMapWith (Map $ Map.union m1 m2)

288+ $ UnionProof unsafeSubset unsafeSubsetWith2

289+

254290-- | Remove the keys that appear in the second map from the first map.

255291difference

256292 :: forall s t k a b. Ord k

@@ -258,6 +294,20 @@ difference

258294difference (Map m1) (Map m2) = SomeMapWith (Map $ Map.difference m1 m2)

259295 $ DifferenceProof unsafeSubset (\f g -> unsafeSubsetWith2 f g) unsafeSubset

260296

297+-- | Return the intersection of two maps, taking values from the first map.

298+--

299+-- @

300+-- 'intersection' = intersectionWith 'const'

301+-- @

302+intersection

303+ :: forall s t k a b. Ord k

304+ => Map s k a

305+ -> Map t k b

306+ -> SomeMapWith (IntersectionProof 'Regular s t) k a

307+intersection (Map m1) (Map m2)

308+ = SomeMapWith (Map $ Map.intersection m1 m2)

309+ $ IntersectionProof unsafeSubset unsafeSubsetWith2

310+

261311-- | Apply a function to all values in a map, together with their corresponding

262312-- keys, that are proven to be in the map. The set of keys remains the same.

263313mapWithKey :: forall s k a b. (Key s k -> a -> b) -> Map s k a -> Map s k b

@@ -314,6 +364,29 @@ toList = gcoerceWith (unsafeCastKey @s @k) $ coerce $ Map.toAscList @k @a

314364toDescList :: forall s k a. Map s k a -> [(Key s k, a)]

315365toDescList = gcoerceWith (unsafeCastKey @s @k) $ coerce $ Map.toDescList @k @a

316366

367+-- | Retain only the values that satisfy the predicate, returning a potentially

368+-- smaller map.

369+filter

370+ :: forall s k a. (a -> Bool)

371+ -> Map s k a

372+ -> SomeMapWith (SupersetProof 'Regular s) k a

373+filter p (Map m) = SomeMapWith (Map $ Map.filter p m)

374+ $ SupersetProof unsafeSubset

375+

376+-- | Retain only the keys that satisfy the predicate, returning a potentially

377+-- smaller map.

378+filterKeys

379+ :: forall s k a. (Key s k -> Bool)

380+ -> Map s k a

381+ -> SomeMapWith (SupersetProof 'Regular s) k a

382+filterKeys p (Map m) = SomeMapWith

383+#if MIN_VERSION_containers(0, 8, 0)

384+ (Map $ Map.filterKeys (p . unsafeKey) m)

385+#else

386+ (Map $ Map.filterWithKey (\k _ -> p (unsafeKey k)) m)

387+#endif

388+ $ SupersetProof unsafeSubset

389+

317390-- | Retain only the key-value pairs that satisfy the predicate, returning a

318391-- potentially smaller map.

319392filterWithKey

@@ -348,6 +421,22 @@ withoutKeys (Map m) = SomeMapWith

348421#endif

349422 $ DifferenceProof unsafeSubset (\f g -> unsafeSubsetWith2 f g) unsafeSubset

350423

424+-- | Partition a map into two disjoint submaps: those whose values satisfy the

425+-- predicate, and those whose don't.

426+partition

427+ :: forall s k a. Ord k -- TODO: this is only used in the proof

428+ => (a -> Bool)

429+ -> Map s k a

430+ -> Some2MapWith (PartitionProof 'Regular s k) k a a

431+partition p (Map m) = case Map.partition p m of

432+ (m1, m2) -> Some2MapWith (Map m1) (Map m2) $ PartitionProof

433+ do \k -> case Map.lookup (unrefine k) m of

434+ Nothing -> error "partition: bug: Data.Map.Refined has been subverted"

435+ Just x -> if p x

436+ then Left $ unsafeKey $ unrefine k

437+ else Right $ unsafeKey $ unrefine k

438+ unsafeSubset unsafeSubsetWith2 \f g -> unsafeSubsetWith2 f g

439+

351440-- | Partition a map into two disjoint submaps: those whose key-value pairs

352441-- satisfy the predicate, and those whose don't.

353442partitionWithKey

@@ -365,6 +454,43 @@ partitionWithKey p (Map m) = case Map.partitionWithKey (p . unsafeKey) m of

365454 else Right $ unsafeKey $ unrefine k

366455 unsafeSubset unsafeSubsetWith2 \f g -> unsafeSubsetWith2 f g

367456

457+-- | Take the a submap of keys up to a point where the predicate stops holding.

458+--

459+-- If @p@ is antitone ( $\forall x y, x < y \implies p(x) \ge p(y)$ ), then

460+-- this point is uniquely defined. If @p@ is not antitone, a splitting point is

461+-- chosen in an unspecified way.

462+takeWhileAntitone

463+ :: forall s k a. (Key s k -> Bool)

464+ -> Map s k a

465+ -> SomeMapWith (SupersetProof 'Regular s) k a

466+takeWhileAntitone p (Map m) = SomeMapWith

467+#if MIN_VERSION_containers(0, 5, 8)

468+ (Map $ Map.takeWhileAntitone (p . unsafeKey) m)

469+#else

470+ (Map $ Map.fromDistinctAscList

471+ $ List.takeWhile (p . unsafeKey . fst) $ Map.toAscList m)

472+#endif

473+ $ SupersetProof unsafeSubset

474+

475+-- | Take the a submap of keys starting from a point where the predicate stops

476+-- holding.

477+--

478+-- If @p@ is antitone ( $\forall x y, x < y \implies p(x) \ge p(y)$ ), then

479+-- this point is uniquely defined. If @p@ is not antitone, a splitting point is

480+-- chosen in an unspecified way.

481+dropWhileAntitone

482+ :: forall s k a. (Key s k -> Bool)

483+ -> Map s k a

484+ -> SomeMapWith (SupersetProof 'Regular s) k a

485+dropWhileAntitone p (Map m) = SomeMapWith

486+#if MIN_VERSION_containers(0, 5, 8)

487+ (Map $ Map.dropWhileAntitone (p . unsafeKey) m)

488+#else

489+ (Map $ Map.fromDistinctAscList

490+ $ List.dropWhile (p . unsafeKey . fst) $ Map.toAscList m)

491+#endif

492+ $ SupersetProof unsafeSubset

493+

368494-- | Divide a map into two disjoint submaps at a point where the predicate on

369495-- the keys stops holding.

370496--

@@ -437,15 +563,15 @@ castKey

437563castKey = castRefined

438564

439565-- | If keys can be interconverted (e.g. as proved by 'castKey'), then the maps

440−-- can be interconverted too. For example, 'zipWithKey' can be implemented via

441−-- 'Data.Map.Refined.intersectionWithKey' by proving that the set of keys

442−-- remains unchanged:

566+-- can be interconverted too. For example, 'Data.Map.Refined.zipWithKey' can be

567+-- implemented via 'Data.Map.Refined.intersectionWithKey' by proving that the

568+-- set of keys remains unchanged:

443569--

444570-- @

445−-- 'zipWithKey'

571+-- 'Data.Map.Refined.zipWithKey'

446572-- :: forall s k a b c. 'Ord' k

447573-- => ('Key' s k -> a -> b -> c) -> 'Map' s k a -> 'Map' s k b -> 'Map' s k c

448−-- 'zipWithKey' f m1 m2

574+-- 'Data.Map.Refined.zipWithKey' f m1 m2

449575-- | v'SomeMapWith' @r m proof <- 'Data.Map.Refined.intersectionWithKey' (f . 'andLeft') m1 m2

450576-- , v'IntersectionProof' p1 p2 <- proof

451577-- , ( v'Coercion' :: t'Coercion' ('Map' r k c) ('Map' s k c))

@@ -470,10 +596,10 @@ instance TraversableWithIndex (Key s k) (Map s k) where

470596 itraverse = traverseWithKey

471597

472598-- | Similar to the instance for functions -- zip corresponding keys. To use

473−-- '<*>'/'Control.Applicative.liftA2' without 'KnownSet' see 'zipWithKey'.

599+-- '<*>'/'Control.Applicative.liftA2' without 'KnownSet' see 'zipWith'.

474600instance (Ord k, KnownSet s k) => Applicative (Map s k) where

475601 pure x = fromSet \_ -> x

476− (<*>) = zipWithKey (const id)

602+ (<*>) = zipWith id

477603

478604-- | @'bind' m f@ is a map that for each key @k :: 'Key' s k@, contains the

479605-- value @f (m '!' k) '!' k@, similar to @'>>='@ for functions.

@@ -493,7 +619,7 @@ instance (Ord k, KnownSet s k) => MonadReader (Key s k) (Map s k) where

493619

494620-- | Append the values at the corresponding keys

495621instance (Ord k, Semigroup a) => Semigroup (Map s k a) where

496− (<>) = zipWithKey (const (<>))

622+ (<>) = zipWith (<>)

497623

498624instance (Ord k, KnownSet s k, Monoid a) => Monoid (Map s k a) where

499625 mempty = fromSet \_ -> mempty

src/Data/Map/Refined.hs+226−7

@@ -43,18 +43,26 @@ module Data.Map.Refined

4343 , SingletonProof(..)

4444 , fromSet

4545 , Common.fromMap

46+ , Common.verifyMap

47+ , fromTraversable

48+ , fromTraversableWith

4649 , fromTraversableWithKey

4750 , FromTraversableProof(..)

4851 -- * Insertion

4952 , insert

53+ , insertWith

54+ , insertWithKey

5055 , InsertProof(..)

5156 , reinsert

5257 , insertLookupWithKey

5358 -- * Deletion/Update

5459 , Common.delete

60+ , adjust'

5561 , adjust

5662 , adjustWithKey

63+ , update'

5764 , update

65+ , updateWithKey

5866 , updateLookupWithKey

5967 -- * Query

6068 , Common.lookup

@@ -70,21 +78,29 @@ module Data.Map.Refined

7078 , Common.disjoint

7179 , DisjointProof(..)

7280 -- * Combine

81+ , zipWith

7382 , zipWithKey

7483 , bind

84+ , Common.union

85+ , unionWith

7586 , unionWithKey

7687 , UnionProof(..)

7788 , Common.difference

7889 , DifferenceProof(..)

90+ , differenceWith

7991 , differenceWithKey

8092 , PartialDifferenceProof(..)

93+ , Common.intersection

94+ , intersectionWith

8195 , intersectionWithKey

8296 , IntersectionProof(..)

8397 -- * Traversal

98+ , map

8499 , mapWithKey

85100 , traverseWithKey

86101 , mapAccumLWithKey

87102 , mapAccumRWithKey

103+ , mapKeys

88104 , mapKeysWith

89105 , MapProof(..)

90106 , backpermuteKeys

@@ -102,12 +118,19 @@ module Data.Map.Refined

102118 -- * Filter

103119 , Common.restrictKeys

104120 , Common.withoutKeys

121+ , Common.filter

122+ , Common.filterKeys

105123 , Common.filterWithKey

124+ , Common.partition

106125 , Common.partitionWithKey

107126 , PartitionProof(..)

127+ , Common.takeWhileAntitone

128+ , Common.dropWhileAntitone

108129 , Common.spanAntitone

109130 , PartialPartitionProof(..)

131+ , mapMaybe

110132 , mapMaybeWithKey

133+ , mapEither

111134 , mapEitherWithKey

112135 , Common.splitLookup

113136 , SplitProof(..)

@@ -131,12 +154,12 @@ import Data.Functor

131154import qualified Data.Map as Map

132155import Data.Map.Common.Refined

133156 ( Map(..), Key, unsafeCastKey, unsafeKey, SomeMapWith(..), Some2MapWith(..)

134− , fromSet, (!), zipWithKey, mapWithKey, traverseWithKey, bind

157+ , fromSet, (!), zipWith, mapWithKey, traverseWithKey, bind

135158 )

136159import qualified Data.Map.Common.Refined as Common

137160import Data.Traversable

138161import Data.Type.Coercion

139−import Prelude hiding (lookup, null)

162+import Prelude hiding (lookup, map, null, zipWith)

140163import Refined

141164import Refined.Unsafe

142165

@@ -147,7 +170,41 @@ singleton :: forall k a. k -> a -> SomeMapWith (SingletonProof 'Regular k) k a

147170singleton k v = SomeMapWith (Map $ Map.singleton k v)

148171 $ SingletonProof (unsafeKey k)

149172

150−-- | Create a map from an arbitrary traversable of key-value pairs.

173+-- | Create a map from an arbitrary traversable of key-value pairs. If a key is

174+-- repeated, the retained value is the last one in traversal order. If you're

175+-- looking for @fromList@, this is the function you want.

176+fromTraversable

177+ :: forall t k a. (Traversable t, Ord k)

178+ => t (k, a) -> SomeMapWith (FromTraversableProof 'Regular t k) k a

179+fromTraversable xs = SomeMapWith (Map m) $ FromTraversableProof proof

180+ where

181+ (m, proof) = mapAccumL

182+ (\s (k, v) -> let !s' = Map.insert k v s in (s', unsafeKey k))

183+ Map.empty

184+ xs

185+

186+-- | Create a map from an arbitrary traversable of key-value pairs, with a

187+-- function for combining values for repeated keys. The function is called as if

188+-- by 'foldl1', but flipped:

189+--

190+-- @

191+-- 'fromTraversableWith' f [(k, x1), (k, x2), (k, x3)]

192+-- = 'singleton' k (f x3 (f x2 x1))

193+-- @

194+fromTraversableWith

195+ :: forall t k a. (Traversable t, Ord k)

196+ => (a -> a -> a)

197+ -> t (k, a)

198+ -> SomeMapWith (FromTraversableProof 'Regular t k) k a

199+fromTraversableWith f xs = SomeMapWith (Map m) $ FromTraversableProof proof

200+ where

201+ (m, proof) = mapAccumL

202+ (\s (k, v) -> let !s' = Map.insertWith f k v s in (s', unsafeKey k))

203+ Map.empty

204+ xs

205+

206+-- | Create a map from an arbitrary traversable of key-value pairs. Like

207+-- 'fromTraversableWith', but the combining function has access to the key.

151208fromTraversableWithKey

152209 :: forall t k a. (Traversable t, Ord k)

153210 => (k -> a -> a -> a)

@@ -169,8 +226,40 @@ insert

169226insert k v (Map m) = SomeMapWith (Map $ Map.insert k v m)

170227 $ InsertProof (unsafeKey k) unsafeSubset

171228

229+-- | Insert a key-value pair into the map to obtain a potentially larger map,

230+-- guaranteed to contain the given key. If the key was already present, the

231+-- supplied function is used to combine the new value with the old (in that

232+-- order).

233+insertWith

234+ :: forall s k a. Ord k

235+ => (a -> a -> a)

236+ -> k

237+ -> a

238+ -> Map s k a

239+ -> SomeMapWith (InsertProof 'Regular k s) k a

240+insertWith f k v (Map m) = SomeMapWith (Map $ Map.insertWith f k v m)

241+ $ InsertProof (unsafeKey k) unsafeSubset

242+

243+-- | Insert a key-value pair into the map to obtain a potentially larger map,

244+-- guaranteed to contain the given key. Like 'insertWith', but the combining

245+-- function has access to the key, which is guaranteed to be in the old map.

246+insertWithKey

247+ :: forall s k a. Ord k

248+ => (Key s k -> a -> a -> a)

249+ -> k

250+ -> a

251+ -> Map s k a

252+ -> SomeMapWith (InsertProof 'Regular k s) k a

253+insertWithKey f k v (Map m) = SomeMapWith

254+ (Map $ Map.insertWithKey (f . unsafeKey) k v m)

255+ $ InsertProof (unsafeKey k) unsafeSubset

256+

172257-- | Overwrite a key-value pair that is known to already be in the map. The set

173258-- of keys remains the same.

259+--

260+-- @

261+-- 'reinsert' k v = 'adjust (const v) k'

262+-- @

174263reinsert

175264 :: forall s k a. Ord k

176265 => Key s k -> a -> Map s k a -> Map s k a

@@ -191,10 +280,15 @@ insertLookupWithKey f k v (Map m)

191280 (v', !m') -> ((unsafeKey k,) <$> v',)

192281 $ SomeMapWith (Map m') $ InsertProof (unsafeKey k) unsafeSubset

193282

283+-- | If the given key is in the map, update the value at that key using the

284+-- given function. In any case, the set of keys remains the same.

285+adjust' :: forall s k a. Ord k => (a -> a) -> k -> Map s k a -> Map s k a

286+adjust' = coerce $ Map.adjust @k @a

287+

194288-- | Update the value at a specific key known the be in the map using the given

195289-- function. The set of keys remains the same.

196290adjust :: forall s k a. Ord k => (a -> a) -> Key s k -> Map s k a -> Map s k a

197−adjust = gcoerceWith (unsafeCastKey @s @k) $ coerce $ Map.adjust @k @a

291+adjust = gcoerceWith (unsafeCastKey @s @k) $ coerce $ adjust' @s @k @a

198292

199293-- | If the given key is in the map, update the associated value using the given

200294-- function with a proof that the key was in the map; otherwise return the map

@@ -204,6 +298,17 @@ adjustWithKey

204298adjustWithKey = gcoerceWith (unsafeCastKey @s @k) $ coerce

205299 $ Map.adjustWithKey @k @a

206300

301+-- | If a key is present in the map, update its value or delete it using the

302+-- given function, returning a potentially smaller map.

303+update'

304+ :: forall s k a. Ord k

305+ => (a -> Maybe a)

306+ -> k

307+ -> Map s k a

308+ -> SomeMapWith (SupersetProof 'Regular s) k a

309+update' f k (Map m) = SomeMapWith (Map $ Map.update f k m)

310+ $ SupersetProof unsafeSubset

311+

207312-- | Update or delete a key known to be in the map using the given function,

208313-- returning a potentially smaller map.

209314update

@@ -212,7 +317,19 @@ update

212317 -> Key s k

213318 -> Map s k a

214319 -> SomeMapWith (SupersetProof 'Regular s) k a

215−update f k (Map m) = SomeMapWith (Map $ Map.update f (unrefine k) m)

320+update = gcoerceWith (unsafeCastKey @s @k) $ coerce $ update' @s @k @a

321+

322+-- | If a key is present in the map, update its value or delete it using the

323+-- given function with a proof that the key was in the map, returning a

324+-- potentially smaller map.

325+updateWithKey

326+ :: forall s k a. Ord k

327+ => (Key s k -> a -> Maybe a)

328+ -> k

329+ -> Map s k a

330+ -> SomeMapWith (SupersetProof 'Regular s) k a

331+updateWithKey f k (Map m) = SomeMapWith

332+ (Map $ Map.updateWithKey (f . unsafeKey) k m)

216333 $ SupersetProof unsafeSubset

217334

218335-- | If the given key is in the map, update or delete it using the given

@@ -230,6 +347,35 @@ updateLookupWithKey f k (Map m)

230347 (v', !m') -> ((unsafeKey k,) <$> v',)

231348 $ SomeMapWith (Map m') $ SupersetProof unsafeSubset

232349

350+-- | Given two maps proven to have the same keys, for each key apply the

351+-- function to the associated values and the key, to obtain a new map with the

352+-- same keys.

353+zipWithKey

354+ :: forall s k a b c. Ord k

355+ => (Key s k -> a -> b -> c) -> Map s k a -> Map s k b -> Map s k c

356+zipWithKey f (Map m1) (Map m2) = Map

357+ $ Map.mergeWithKey (\k x y -> Just $ f (unsafeKey k) x y)

358+ (\m -> if Map.null m

359+ then Map.empty

360+ else error "zipWithKey: bug: Data.Map.Refined has been subverted")

361+ (\m -> if Map.null m

362+ then Map.empty

363+ else error "zipWithKey: bug: Data.Map.Refined has been subverted")

364+ -- ^ Work around https://github.com/haskell/containers/issues/979

365+ m1

366+ m2

367+

368+-- | Return the union of two maps, with a given combining function for keys that

369+-- exist in both maps simultaneously.

370+unionWith

371+ :: forall s t k a. Ord k

372+ => (a -> a -> a)

373+ -> Map s k a

374+ -> Map t k a

375+ -> SomeMapWith (UnionProof 'Regular s t) k a

376+unionWith f (Map m1) (Map m2) = SomeMapWith (Map $ Map.unionWith f m1 m2)

377+ $ UnionProof unsafeSubset unsafeSubsetWith2

378+

233379-- | Return the union of two maps, with a given combining function for keys that

234380-- exist in both maps simultaneously.

235381--

@@ -245,8 +391,20 @@ unionWithKey f (Map m1) (Map m2)

245391 = SomeMapWith (Map $ Map.unionWithKey (f . reallyUnsafeRefine) m1 m2)

246392 $ UnionProof unsafeSubset unsafeSubsetWith2

247393

248−-- | For keys that appear in both maps, the given function decides whether the

249−-- key is removed from the first map.

394+-- | Return the first map, but for keys that appear in both maps, the given

395+-- function decides whether the key is removed.

396+differenceWith

397+ :: forall s t k a b. Ord k

398+ => (a -> b -> Maybe a)

399+ -> Map s k a

400+ -> Map t k b

401+ -> SomeMapWith (PartialDifferenceProof 'Regular s t) k a

402+differenceWith f (Map m1) (Map m2)

403+ = SomeMapWith (Map $ Map.differenceWith f m1 m2)

404+ $ PartialDifferenceProof unsafeSubset unsafeSubset

405+

406+-- | Return the first map, but for keys that appear in both maps, the given

407+-- function decides whether the key is removed.

250408--

251409-- You can use 'andLeft' and 'andRight' to obtain @'Key' s k@ and @'Key' t k@

252410-- respectively.

@@ -260,6 +418,17 @@ differenceWithKey f (Map m1) (Map m2)

260418 = SomeMapWith (Map $ Map.differenceWithKey (f . reallyUnsafeRefine) m1 m2)

261419 $ PartialDifferenceProof unsafeSubset unsafeSubset

262420

421+-- | Return the intersection of two maps with the given combining function.

422+intersectionWith

423+ :: forall s t k a b c. Ord k

424+ => (a -> b -> c)

425+ -> Map s k a

426+ -> Map t k b

427+ -> SomeMapWith (IntersectionProof 'Regular s t) k c

428+intersectionWith f (Map m1) (Map m2)

429+ = SomeMapWith (Map $ Map.intersectionWith f m1 m2)

430+ $ IntersectionProof unsafeSubset unsafeSubsetWith2

431+

263432-- | Return the intersection of two maps with the given combining function.

264433--

265434-- You can use 'andLeft' and 'andRight' to obtain @'Key' s k@ and @'Key' t k@

@@ -274,6 +443,10 @@ intersectionWithKey f (Map m1) (Map m2)

274443 = SomeMapWith (Map $ Map.intersectionWithKey (f . reallyUnsafeRefine) m1 m2)

275444 $ IntersectionProof unsafeSubset unsafeSubsetWith2

276445

446+-- | Apply a function to all values in a map. The set of keys remains the same.

447+map :: forall s k a b. (a -> b) -> Map s k a -> Map s k b

448+map = coerce $ Map.map @a @b @k

449+

277450-- | Thread an accumularing argument through the map in ascending order of keys.

278451mapAccumLWithKey

279452 :: forall s k a b c. (a -> Key s k -> b -> (a, c))

@@ -293,6 +466,26 @@ mapAccumRWithKey

293466mapAccumRWithKey = gcoerceWith (unsafeCastKey @s @k) $ coerce

294467 $ Map.mapAccumRWithKey @a @k @b @c

295468

469+-- | @'mapKeys' f m@ applies @f@ to each key of @m@ and collects the results

470+-- into a new map. For keys that were mapped to the same new key, the value

471+-- corresponding to the greatest of the original keys is retained.

472+mapKeys

473+ :: forall s k1 k2 a. Ord k2

474+ => (Key s k1 -> k2)

475+ -> Map s k1 a

476+ -> SomeMapWith (MapProof 'Regular s k1 k2) k2 a

477+mapKeys g (Map m)

478+ = SomeMapWith (Map $ Map.mapKeys (g . unsafeKey) m)

479+ $ MapProof (unsafeKey . g) \k2 -> case Map.lookup (unrefine k2) backMap of

480+ Nothing -> error "mapKeys: bug: Data.Map.Refined has been subverted"

481+ Just k1 -> k1

482+ where

483+ ~backMap = Map.fromList

484+ [ (k2, unsafeKey k1)

485+ | k1 <- Map.keys m

486+ , let !k2 = g $ unsafeKey k1

487+ ]

488+

296489-- | @'mapKeysWith' c f m@ applies @f@ to each key of @m@ and collects the

297490-- results into a new map. For keys that were mapped to the same new key, @c@

298491-- acts as the combining function for corresponding values.

@@ -314,6 +507,15 @@ mapKeysWith f g (Map m)

314507 , let !k2 = g $ unsafeKey k1

315508 ]

316509

510+-- | Apply a function to all values in a map and collect only the 'Just'

511+-- results, returning a potentially smaller map.

512+mapMaybe

513+ :: forall s k a b. (a -> Maybe b)

514+ -> Map s k a

515+ -> SomeMapWith (SupersetProof 'Regular s) k b

516+mapMaybe f (Map m) = SomeMapWith (Map $ Map.mapMaybe f m)

517+ $ SupersetProof unsafeSubset

518+

317519-- | Apply a function to all values in a map, together with their corresponding

318520-- keys, and collect only the 'Just' results, returning a potentially smaller

319521-- map.

@@ -325,6 +527,23 @@ mapMaybeWithKey f (Map m)

325527 = SomeMapWith (Map $ Map.mapMaybeWithKey (f . unsafeKey) m)

326528 $ SupersetProof unsafeSubset

327529

530+-- | Apply a function to all values in a map and collect the 'Left' and 'Right'

531+-- results into separate (disjoint) maps.

532+mapEither

533+ :: forall s k a b c. Ord k -- TODO: this is only used in the proof

534+ => (a -> Either b c)

535+ -> Map s k a

536+ -> Some2MapWith (PartitionProof 'Regular s k) k b c

537+mapEither p (Map m) = case Map.mapEither p m of

538+ (m1, m2) -> Some2MapWith (Map m1) (Map m2) $ PartitionProof

539+ do \k -> case Map.lookup (unrefine k) m of

540+ Nothing -> error

541+ "mapEither: bug: Data.Map.Refined has been subverted"

542+ Just x -> case p x of

543+ Left _ -> Left $ unsafeKey $ unrefine k

544+ Right _ -> Right $ unsafeKey $ unrefine k

545+ unsafeSubset unsafeSubsetWith2 \f g -> unsafeSubsetWith2 f g

546+

328547-- | Apply a function to all values in a map, together with their corresponding

329548-- keys, and collect the 'Left' and 'Right' results into separate (disjoint)

330549-- maps.

src/Data/Map/Strict/Refined.hs+226−6

@@ -43,18 +43,26 @@ module Data.Map.Strict.Refined

4343 , SingletonProof(..)

4444 , fromSet

4545 , Common.fromMap

46+ , Common.verifyMap

47+ , fromTraversable

48+ , fromTraversableWith

4649 , fromTraversableWithKey

4750 , FromTraversableProof(..)

4851 -- * Insertion

4952 , insert

53+ , insertWith

54+ , insertWithKey

5055 , InsertProof(..)

5156 , reinsert

5257 , insertLookupWithKey

5358 -- * Deletion/Update

5459 , Common.delete

60+ , adjust'

5561 , adjust

5662 , adjustWithKey

63+ , update'

5764 , update

65+ , updateWithKey

5866 , updateLookupWithKey

5967 -- * Query

6068 , Common.lookup

@@ -70,21 +78,29 @@ module Data.Map.Strict.Refined

7078 , Common.disjoint

7179 , DisjointProof(..)

7280 -- * Combine

81+ , zipWith

7382 , zipWithKey

7483 , bind

84+ , Common.union

85+ , unionWith

7586 , unionWithKey

7687 , UnionProof(..)

7788 , Common.difference

7889 , DifferenceProof(..)

90+ , differenceWith

7991 , differenceWithKey

8092 , PartialDifferenceProof(..)

93+ , Common.intersection

94+ , intersectionWith

8195 , intersectionWithKey

8296 , IntersectionProof(..)

8397 -- * Traversal

98+ , map

8499 , mapWithKey

85100 , traverseWithKey

86101 , mapAccumLWithKey

87102 , mapAccumRWithKey

103+ , mapKeys

88104 , mapKeysWith

89105 , MapProof(..)

90106 , backpermuteKeys

@@ -102,12 +118,19 @@ module Data.Map.Strict.Refined

102118 -- * Filter

103119 , Common.restrictKeys

104120 , Common.withoutKeys

121+ , Common.filter

122+ , Common.filterKeys

105123 , Common.filterWithKey

124+ , Common.partition

106125 , Common.partitionWithKey

107126 , PartitionProof(..)

127+ , Common.takeWhileAntitone

128+ , Common.dropWhileAntitone

108129 , Common.spanAntitone

109130 , PartialPartitionProof(..)

131+ , mapMaybe

110132 , mapMaybeWithKey

133+ , mapEither

111134 , mapEitherWithKey

112135 , Common.splitLookup

113136 , SplitProof(..)

@@ -138,7 +161,7 @@ import Data.Proxy

138161import Data.Reflection

139162import Data.Traversable

140163import Data.Type.Coercion

141−import Prelude hiding (lookup, null)

164+import Prelude hiding (lookup, map, null, zipWith)

142165import Refined

143166import Refined.Unsafe

144167

@@ -154,7 +177,41 @@ singleton k v = SomeMapWith (Map $ Map.singleton k v)

154177fromSet :: forall s k a. KnownSet s k => (Key s k -> a) -> Map s k a

155178fromSet f = Map $ Map.fromSet (f . unsafeKey) (reflect $ Proxy @s)

156179

157−-- | Create a map from an arbitrary traversable of key-value pairs.

180+-- | Create a map from an arbitrary traversable of key-value pairs. If a key is

181+-- repeated, the retained value is the last one in traversal order. If you're

182+-- looking for @fromList@, this is the function you want.

183+fromTraversable

184+ :: forall t k a. (Traversable t, Ord k)

185+ => t (k, a) -> SomeMapWith (FromTraversableProof 'Regular t k) k a

186+fromTraversable xs = SomeMapWith (Map m) $ FromTraversableProof proof

187+ where

188+ (m, proof) = mapAccumL

189+ (\s (k, v) -> let !s' = Map.insert k v s in (s', unsafeKey k))

190+ Map.empty

191+ xs

192+

193+-- | Create a map from an arbitrary traversable of key-value pairs, with a

194+-- function for combining values for repeated keys. The function is called as if

195+-- by 'foldl1', but flipped:

196+--

197+-- @

198+-- 'fromTraversableWith' f [(k, x1), (k, x2), (k, x3)]

199+-- = 'singleton' k (f x3 (f x2 x1))

200+-- @

201+fromTraversableWith

202+ :: forall t k a. (Traversable t, Ord k)

203+ => (a -> a -> a)

204+ -> t (k, a)

205+ -> SomeMapWith (FromTraversableProof 'Regular t k) k a

206+fromTraversableWith f xs = SomeMapWith (Map m) $ FromTraversableProof proof

207+ where

208+ (m, proof) = mapAccumL

209+ (\s (k, v) -> let !s' = Map.insertWith f k v s in (s', unsafeKey k))

210+ Map.empty

211+ xs

212+

213+-- | Create a map from an arbitrary traversable of key-value pairs. Like

214+-- 'fromTraversableWith', but the combining function has access to the key.

158215fromTraversableWithKey

159216 :: forall t k a. (Traversable t, Ord k)

160217 => (k -> a -> a -> a)

@@ -176,8 +233,40 @@ insert

176233insert k v (Map m) = SomeMapWith (Map $ Map.insert k v m)

177234 $ InsertProof (unsafeKey k) unsafeSubset

178235

236+-- | Insert a key-value pair into the map to obtain a potentially larger map,

237+-- guaranteed to contain the given key. If the key was already present, the

238+-- supplied function is used to combine the new value with the old (in that

239+-- order).

240+insertWith

241+ :: forall s k a. Ord k

242+ => (a -> a -> a)

243+ -> k

244+ -> a

245+ -> Map s k a

246+ -> SomeMapWith (InsertProof 'Regular k s) k a

247+insertWith f k v (Map m) = SomeMapWith (Map $ Map.insertWith f k v m)

248+ $ InsertProof (unsafeKey k) unsafeSubset

249+

250+-- | Insert a key-value pair into the map to obtain a potentially larger map,

251+-- guaranteed to contain the given key. Like 'insertWith', but the combining

252+-- function has access to the key, which is guaranteed to be in the old map.

253+insertWithKey

254+ :: forall s k a. Ord k

255+ => (Key s k -> a -> a -> a)

256+ -> k

257+ -> a

258+ -> Map s k a

259+ -> SomeMapWith (InsertProof 'Regular k s) k a

260+insertWithKey f k v (Map m) = SomeMapWith

261+ (Map $ Map.insertWithKey (f . unsafeKey) k v m)

262+ $ InsertProof (unsafeKey k) unsafeSubset

263+

179264-- | Overwrite a key-value pair that is known to already be in the map. The set

180265-- of keys remains the same.

266+--

267+-- @

268+-- 'reinsert' k v = 'adjust (const v) k'

269+-- @

181270reinsert

182271 :: forall s k a. Ord k

183272 => Key s k -> a -> Map s k a -> Map s k a

@@ -198,10 +287,15 @@ insertLookupWithKey f k v (Map m)

198287 (v', !m') -> ((unsafeKey k,) <$> v',)

199288 $ SomeMapWith (Map m') $ InsertProof (unsafeKey k) unsafeSubset

200289

290+-- | If the given key is in the map, update the value at that key using the

291+-- given function. In any case, the set of keys remains the same.

292+adjust' :: forall s k a. Ord k => (a -> a) -> k -> Map s k a -> Map s k a

293+adjust' = coerce $ Map.adjust @k @a

294+

201295-- | Update the value at a specific key known the be in the map using the given

202296-- function. The set of keys remains the same.

203297adjust :: forall s k a. Ord k => (a -> a) -> Key s k -> Map s k a -> Map s k a

204−adjust = gcoerceWith (unsafeCastKey @s @k) $ coerce $ Map.adjust @k @a

298+adjust = gcoerceWith (unsafeCastKey @s @k) $ coerce $ adjust' @s @k @a

205299

206300-- | If the given key is in the map, update the associated value using the given

207301-- function with a proof that the key was in the map; otherwise return the map

@@ -211,6 +305,17 @@ adjustWithKey

211305adjustWithKey = gcoerceWith (unsafeCastKey @s @k) $ coerce

212306 $ Map.adjustWithKey @k @a

213307

308+-- | If a key is present in the map, update its value or delete it using the

309+-- given function, returning a potentially smaller map.

310+update'

311+ :: forall s k a. Ord k

312+ => (a -> Maybe a)

313+ -> k

314+ -> Map s k a

315+ -> SomeMapWith (SupersetProof 'Regular s) k a

316+update' f k (Map m) = SomeMapWith (Map $ Map.update f k m)

317+ $ SupersetProof unsafeSubset

318+

214319-- | Update or delete a key known to be in the map using the given function,

215320-- returning a potentially smaller map.

216321update

@@ -219,7 +324,19 @@ update

219324 -> Key s k

220325 -> Map s k a

221326 -> SomeMapWith (SupersetProof 'Regular s) k a

222−update f k (Map m) = SomeMapWith (Map $ Map.update f (unrefine k) m)

327+update = gcoerceWith (unsafeCastKey @s @k) $ coerce $ update' @s @k @a

328+

329+-- | If a key is present in the map, update its value or delete it using the

330+-- given function with a proof that the key was in the map, returning a

331+-- potentially smaller map.

332+updateWithKey

333+ :: forall s k a. Ord k

334+ => (Key s k -> a -> Maybe a)

335+ -> k

336+ -> Map s k a

337+ -> SomeMapWith (SupersetProof 'Regular s) k a

338+updateWithKey f k (Map m) = SomeMapWith

339+ (Map $ Map.updateWithKey (f . unsafeKey) k m)

223340 $ SupersetProof unsafeSubset

224341

225342-- | If the given key is in the map, update or delete it using the given

@@ -239,6 +356,24 @@ updateLookupWithKey f k (Map m)

239356

240357-- | Given two maps proven to have the same keys, for each key apply the

241358-- function to the associated values, to obtain a new map with the same keys.

359+zipWith

360+ :: forall s k a b c. Ord k

361+ => (a -> b -> c) -> Map s k a -> Map s k b -> Map s k c

362+zipWith f (Map m1) (Map m2) = Map

363+ $ Map.mergeWithKey (\_ x y -> Just $ f x y)

364+ (\m -> if Map.null m

365+ then Map.empty

366+ else error "zipWith: bug: Data.Map.Strict.Refined has been subverted")

367+ (\m -> if Map.null m

368+ then Map.empty

369+ else error "zipWith: bug: Data.Map.Strict.Refined has been subverted")

370+ -- ^ Work around https://github.com/haskell/containers/issues/979

371+ m1

372+ m2

373+

374+-- | Given two maps proven to have the same keys, for each key apply the

375+-- function to the associated values and the key, to obtain a new map with the

376+-- same keys.

242377zipWithKey

243378 :: forall s k a b c. Ord k

244379 => (Key s k -> a -> b -> c) -> Map s k a -> Map s k b -> Map s k c

@@ -254,6 +389,17 @@ zipWithKey f (Map m1) (Map m2) = Map

254389 m1

255390 m2

256391

392+-- | Return the union of two maps, with a given combining function for keys that

393+-- exist in both maps simultaneously.

394+unionWith

395+ :: forall s t k a. Ord k

396+ => (a -> a -> a)

397+ -> Map s k a

398+ -> Map t k a

399+ -> SomeMapWith (UnionProof 'Regular s t) k a

400+unionWith f (Map m1) (Map m2) = SomeMapWith (Map $ Map.unionWith f m1 m2)

401+ $ UnionProof unsafeSubset unsafeSubsetWith2

402+

257403-- | Return the union of two maps, with a given combining function for keys that

258404-- exist in both maps simultaneously.

259405--

@@ -269,8 +415,20 @@ unionWithKey f (Map m1) (Map m2)

269415 = SomeMapWith (Map $ Map.unionWithKey (f . reallyUnsafeRefine) m1 m2)

270416 $ UnionProof unsafeSubset unsafeSubsetWith2

271417

272−-- | For keys that appear in both maps, the given function decides whether the

273−-- key is removed from the first map.

418+-- | Return the first map, but for keys that appear in both maps, the given

419+-- function decides whether the key is removed.

420+differenceWith

421+ :: forall s t k a b. Ord k

422+ => (a -> b -> Maybe a)

423+ -> Map s k a

424+ -> Map t k b

425+ -> SomeMapWith (PartialDifferenceProof 'Regular s t) k a

426+differenceWith f (Map m1) (Map m2)

427+ = SomeMapWith (Map $ Map.differenceWith f m1 m2)

428+ $ PartialDifferenceProof unsafeSubset unsafeSubset

429+

430+-- | Return the first map, but for keys that appear in both maps, the given

431+-- function decides whether the key is removed.

274432--

275433-- You can use 'andLeft' and 'andRight' to obtain @'Key' s k@ and @'Key' t k@

276434-- respectively.

@@ -284,6 +442,17 @@ differenceWithKey f (Map m1) (Map m2)

284442 = SomeMapWith (Map $ Map.differenceWithKey (f . reallyUnsafeRefine) m1 m2)

285443 $ PartialDifferenceProof unsafeSubset unsafeSubset

286444

445+-- | Return the intersection of two maps with the given combining function.

446+intersectionWith

447+ :: forall s t k a b c. Ord k

448+ => (a -> b -> c)

449+ -> Map s k a

450+ -> Map t k b

451+ -> SomeMapWith (IntersectionProof 'Regular s t) k c

452+intersectionWith f (Map m1) (Map m2)

453+ = SomeMapWith (Map $ Map.intersectionWith f m1 m2)

454+ $ IntersectionProof unsafeSubset unsafeSubsetWith2

455+

287456-- | Return the intersection of two maps with the given combining function.

288457--

289458-- You can use 'andLeft' and 'andRight' to obtain @'Key' s k@ and @'Key' t k@

@@ -298,6 +467,10 @@ intersectionWithKey f (Map m1) (Map m2)

298467 = SomeMapWith (Map $ Map.intersectionWithKey (f . reallyUnsafeRefine) m1 m2)

299468 $ IntersectionProof unsafeSubset unsafeSubsetWith2

300469

470+-- | Apply a function to all values in a map. The set of keys remains the same.

471+map :: forall s k a b. (a -> b) -> Map s k a -> Map s k b

472+map = coerce $ Map.map @a @b @k

473+

301474-- | Apply a function to all values in a map, together with their corresponding

302475-- keys, that are proven to be in the map. The set of keys remains the same.

303476mapWithKey :: forall s k a b. (Key s k -> a -> b) -> Map s k a -> Map s k b

@@ -331,6 +504,27 @@ mapAccumRWithKey

331504mapAccumRWithKey = gcoerceWith (unsafeCastKey @s @k) $ coerce

332505 $ Map.mapAccumRWithKey @a @k @b @c

333506

507+-- | @'mapKeys' f m@ applies @f@ to each key of @m@ and collects the results

508+-- into a new map. For keys that were mapped to the same new key, the value

509+-- corresponding to the greatest of the original keys is retained.

510+mapKeys

511+ :: forall s k1 k2 a. Ord k2

512+ => (Key s k1 -> k2)

513+ -> Map s k1 a

514+ -> SomeMapWith (MapProof 'Regular s k1 k2) k2 a

515+mapKeys g (Map m)

516+ = SomeMapWith (Map $ Map.mapKeys (g . unsafeKey) m)

517+ $ MapProof (unsafeKey . g) \k2 -> case Map.lookup (unrefine k2) backMap of

518+ Nothing -> error

519+ "mapKeys: bug: Data.Map.Strict.Refined has been subverted"

520+ Just k1 -> k1

521+ where

522+ ~backMap = Map.fromList

523+ [ (k2, unsafeKey k1)

524+ | k1 <- Map.keys m

525+ , let !k2 = g $ unsafeKey k1

526+ ]

527+

334528-- | @'mapKeysWith' c f m@ applies @f@ to each key of @m@ and collects the

335529-- results into a new map. For keys that were mapped to the same new key, @c@

336530-- acts as the combining function for corresponding values.

@@ -353,6 +547,15 @@ mapKeysWith f g (Map m)

353547 , let !k2 = g $ unsafeKey k1

354548 ]

355549

550+-- | Apply a function to all values in a map and collect only the 'Just'

551+-- results, returning a potentially smaller map.

552+mapMaybe

553+ :: forall s k a b. (a -> Maybe b)

554+ -> Map s k a

555+ -> SomeMapWith (SupersetProof 'Regular s) k b

556+mapMaybe f (Map m) = SomeMapWith (Map $ Map.mapMaybe f m)

557+ $ SupersetProof unsafeSubset

558+

356559-- | Apply a function to all values in a map, together with their corresponding

357560-- keys, and collect only the 'Just' results, returning a potentially smaller

358561-- map.

@@ -364,6 +567,23 @@ mapMaybeWithKey f (Map m)

364567 = SomeMapWith (Map $ Map.mapMaybeWithKey (f . unsafeKey) m)

365568 $ SupersetProof unsafeSubset

366569

570+-- | Apply a function to all values in a map and collect the 'Left' and 'Right'

571+-- results into separate (disjoint) maps.

572+mapEither

573+ :: forall s k a b c. Ord k -- TODO: this is only used in the proof

574+ => (a -> Either b c)

575+ -> Map s k a

576+ -> Some2MapWith (PartitionProof 'Regular s k) k b c

577+mapEither p (Map m) = case Map.mapEither p m of

578+ (m1, m2) -> Some2MapWith (Map m1) (Map m2) $ PartitionProof

579+ do \k -> case Map.lookup (unrefine k) m of

580+ Nothing -> error

581+ "mapEither: bug: Data.Map.Strict.Refined has been subverted"

582+ Just x -> case p x of

583+ Left _ -> Left $ unsafeKey $ unrefine k

584+ Right _ -> Right $ unsafeKey $ unrefine k

585+ unsafeSubset unsafeSubsetWith2 \f g -> unsafeSubsetWith2 f g

586+

367587-- | Apply a function to all values in a map, together with their corresponding

368588-- keys, and collect the 'Left' and 'Right' results into separate (disjoint)

369589-- maps.

src/Data/Set/Refined.hs+1−1

@@ -185,7 +185,7 @@ data SomeSet a where

185185-- you a way to refer to the set (the parameter @s@), e.g.:

186186--

187187-- @

188−-- 'withSet' ('fromSet' ...) $ \(_ :: 'Proxy' s) -> doSomethingWith \@s

188+-- 'withSet' ('fromSet' ...) $ \\(_ :: 'Proxy' s) -> doSomethingWith \@s

189189-- @

190190withSet

191191 :: forall a r. SomeSet a -> (forall s. KnownSet s a => Proxy s -> r) -> r