0853bef..master · type-fun

CHANGELOG.md+7

since splitsnapshots

unifiedsplit

@@ -4,6 +4,13 @@

4

5# CHANGELOG

6

7+## 0.1.2

8+### Added KnownPeano

9+

10+## 0.1.1

11+### Fixed

12+* Compilable with ghc-8.0.1

13+

7## 0.1.0

14## 0.1.0

8### Added

15### Added

9* Type family `Substract` to remove elements of one list from another

16* Type family `Substract` to remove elements of one list from another

example/Main.hs+1

@@ -37,4 +37,5 @@ main = do

37 print $ prefixConstr p2

38 print $ prefixConstr p3

39 print $ uniqConstr p2

40+ print $ peanoVal (Proxy :: Proxy (FromNat 100))

40 -- print $ uniqConstr p3 -- < ElementIsNotUniqInList Int '[Int, Bool, Int]

41 -- print $ uniqConstr p3 -- < ElementIsNotUniqInList Int '[Int, Bool, Int]

src/TypeFun/Data/Peano.hs+14−3

@@ -1,5 +1,6 @@

1module TypeFun.Data.Peano

2 ( N(..)

3+ , KnownPeano(..)

3 , ToNat

4 , ToNat

4 , FromNat

5 , FromNat

5 , (:+:)

6 , (:+:)

@@ -7,14 +8,24 @@ module TypeFun.Data.Peano

7 , (:*:)

8 , (:*:)

8 ) where

9 ) where

9

10

10−import Data.Typeable

11+import Data.Typeable

11−import GHC.Generics (Generic)

12+import GHC.Generics (Generic)

12−import GHC.TypeLits

13+import GHC.TypeLits

13

14

14data N = Z | S N

15data N = Z | S N

15 deriving ( Eq, Ord, Read, Show

16 deriving ( Eq, Ord, Read, Show

16 , Generic, Typeable )

17 , Generic, Typeable )

17

18

19+-- | @since 0.1.2

20+class KnownPeano (p :: N) where

21+ peanoVal :: proxy p -> Integer

22+

23+instance KnownPeano Z where

24+ peanoVal _ = 0

25+

26+instance (KnownPeano n) => KnownPeano (S n) where

27+ peanoVal _ = succ $ peanoVal (Proxy :: Proxy n)

28+

18type family ToNat (a :: N) :: Nat where

29type family ToNat (a :: N) :: Nat where

19 ToNat Z = 0

30 ToNat Z = 0

20 ToNat (S a) = 1 + (ToNat a)

31 ToNat (S a) = 1 + (ToNat a)

stack.yamlnew file+9

@@ -0,0 +1,9 @@

1+nix:

2+ packages:

3+ - zlib

4+ - postgresql

5+

6+resolver: lts-13.21

7+

8+packages:

9+ - .

stack.yaml.locknew file+12

@@ -0,0 +1,12 @@

1+# This file was autogenerated by Stack.

2+# You should not edit this file by hand.

3+# For more information, please see the documentation at:

4+# https://docs.haskellstack.org/en/stable/lock_files

5+

6+packages: []

7+snapshots:

8+- completed:

9+ size: 498180

10+ url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/13/21.yaml

11+ sha256: eff2de19a6d4691ccbf6edc1fba858f1918683047dce0f09adede874bbd2a8f3

12+ original: lts-13.21

type-fun.cabal+2−2

@@ -1,5 +1,5 @@

1name: type-fun

2−version: 0.1.0

2+version: 0.1.2

3synopsis: Collection of widely reimplemented type families

4license: BSD3

5license-file: LICENSE

@@ -36,7 +36,7 @@ library

36 , TypeFun.Data.Maybe

37 , TypeFun.Data.Peano

38

39− build-depends: base >=4.7 && <4.9

39+ build-depends: base >= 4.7 && < 5

40

41test-suite example

42 type: exitcode-stdio-1.0