↧
Answer by Thomas M. DuBuisson for Haskell expression data type
You could define a newtype wrapper Var or just use String. First the newtype wrapper example:newtype Var = V String-- ^ "Var" here is a type declaration. "V" is declaring a data constructor.data Exp =...
View ArticleHaskell expression data type
I want to have the following data type in Haskell :data Exp = Add Exp Exp | Var String | Let (Var String) Exp Exp | Int Int However, using (Var String) like that is not allowed. I could use Exp instead...
View Article