module Data.HList.String
- (
+ ( HString
+ , hString
)
where
---import Data.HList.Prelude
+import Data.HList.Number
+import Data.HList.Prelude
+import Language.Haskell.TH
+import Language.Haskell.TH.Quote
+
+
+class HString s
+
+instance HString HNil
+
+instance HNat c => HString (HCons c s)
+
+hString :: QuasiQuoter
+hString = QuasiQuoter quoteStrExp quoteStrPat
+
+quoteStrExp :: String -> ExpQ
+quoteStrExp [] = varE (mkName "hNil")
+quoteStrExp (c:cs) = appsE [ varE (mkName "hCons")
+ , hNatLiteralE (fromEnum c)
+ , quoteStrExp cs
+ ]
+
+quoteStrPat :: String -> PatQ
+quoteStrPat [] = varP (mkName "HNil")
+quoteStrPat (c:cs) = conP (mkName "HCons") [ hNatLiteralP (fromEnum c)
+ , quoteStrPat cs
+ ]