First i want to say I'm a newbie in Haskell. Here's my problem:
For a school project I need to be able to parse and interprate and execute a fucntion call. This call needs to be able to execute a function already defined in haskell.
Parsing the call works, but i have no idea how to execute the function because the amount of arguments and type is unkown.
Here is how i represent my data
type Name = String
type Cond = Expr
data Expr
= Num Int
| Boolean Bool
| BinOp Op Expr Expr
| Var Name
deriving (Eq, Ord, Show)
data Stmnt
= Call Name [Expr]
| If Cond [Stmnt] [Stmnt]
| While Cond [Stmnt]
| VarDef Name Expr
deriving (Eq, Ord, Show)
This is a part of my interpeter. And it is with the implementation of funcall that I need help.
data Value = FineInt Int
| FineBool Bool
| FineFun ([Value] -> Value)
-- The enviroment keeps track of variables in the program
type Env = [(Name,Value)]
-- A state that takes an enviroment
type StEnv = State Env
evalstm :: Stmnt -> StEnv ()
evalstm (Call name exprs) = funcall name exprs
-- funcall name exprs = ?