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{-# OPTIONS_GHC -Wno-missing-export-lists #-}
module Utils where
import Control.Monad.Except
import Control.Monad.Reader
import qualified Data.Map as M
import qualified Data.List as L
import qualified Data.Char as C
-- TYPES
type PositionString = String
type ErrorString = String
data LException = LException (Maybe PositionString) ErrorString
data Config = Config {
configScriptFileName :: Maybe String,
configVerboseMode :: Bool,
configShowHelp :: Bool,
configPrintEvaled :: Bool,
configPrintCallStack :: Bool,
configUseREPL :: Bool
}
type LContext a = ReaderT Config (ExceptT LException IO) a
runL :: Config -> LContext a -> IO (Either LException a)
runL config lc = runExceptT $ runReaderT lc config
data Token = Token {
tokenContent :: String,
tokenRow :: Int,
tokenColumn :: Int,
tokenFileName :: String
}
instance (Eq Token) where
Token { tokenContent = tc1 } == Token { tokenContent = tc2 } = tc1 == tc2
instance (Show Token) where
show token = show $ tokenContent token
type Env = M.Map String AST
type LFunction = (Env -> AST -> LContext AST)
data ASTNode
= ASTInteger Int
| ASTDouble Double
| ASTSymbol String
| ASTBoolean Bool
| ASTString String
| ASTVector [AST]
| ASTFunctionCall [AST]
| ASTHashMap (M.Map AST AST)
| ASTFunction LFunction
| ASTUnit
| ASTHole
data AST = AST {
astNode :: ASTNode,
astRow :: Int,
astColumn :: Int,
astFileName :: String
}
instance (Show AST) where
show (AST { astNode = node }) = show node
instance (Show ASTNode) where
show (ASTInteger n) = show n
show (ASTDouble n) = show n
show (ASTSymbol s) = s
show (ASTBoolean b) = show b $> map C.toLower
show (ASTString s) = show s
show (ASTVector v) = "[" ++ L.intercalate " " (map show v) ++ "]"
show (ASTFunctionCall v) = "(" ++ L.intercalate " " (map show v) ++ ")"
show (ASTHashMap m) =
let flattenMap = M.assocs .> L.concatMap (\(k, v) -> [k, v])
in "{" ++ L.intercalate " " (map show $ flattenMap m) ++ "}"
show (ASTFunction _) = "<fn>"
show ASTUnit = "<unit>"
show ASTHole = "<hole>"
instance (Eq AST) where
AST { astNode = node1 } == AST { astNode = node2 } = node1 == node2
instance (Eq ASTNode) where
ASTInteger a == ASTInteger b = a == b
ASTDouble a == ASTDouble b = a == b
ASTSymbol a == ASTSymbol b = a == b
ASTBoolean a == ASTBoolean b = a == b
ASTString a == ASTString b = a == b
ASTVector a == ASTVector b = a == b
ASTFunctionCall a == ASTFunctionCall b = a == b
ASTHashMap a == ASTHashMap b = a == b
ASTUnit == ASTUnit = True
ASTHole == _ = True
_ == ASTHole = True
_ == _ = False
instance (Ord AST) where
AST { astNode = node1 } <= AST { astNode = node2 } = node1 <= node2
instance (Ord ASTNode) where
ASTInteger a <= ASTInteger b = a <= b
ASTDouble a <= ASTDouble b = a <= b
ASTSymbol a <= ASTSymbol b = a <= b
ASTBoolean a <= ASTBoolean b = a <= b
ASTString a <= ASTString b = a <= b
ASTVector a <= ASTVector b = a <= b
ASTFunctionCall a <= ASTFunctionCall b = a <= b
ASTHashMap a <= ASTHashMap b = a <= b
ASTUnit <= ASTUnit = True
ASTHole <= _ = True
_ <= ASTHole = True
_ <= _ = False
assertIsASTFunction :: AST -> LContext AST
assertIsASTFunction ast@(AST { astNode = node }) = case node of
(ASTFunction _) -> return ast
_ -> throwL (astPos ast) $ show node ++ " is not a function"
assertIsASTInteger :: AST -> LContext AST
assertIsASTInteger ast@(AST { astNode = node }) = case node of
(ASTInteger _) -> return ast
_ -> throwL (astPos ast) $ show node ++ " is not an integer"
assertIsASTSymbol :: AST -> LContext AST
assertIsASTSymbol ast@(AST { astNode = node }) = case node of
(ASTSymbol _) -> return ast
_ -> throwL (astPos ast) $ show node ++ " is not a symbol"
assertIsASTVector :: AST -> LContext AST
assertIsASTVector ast@(AST { astNode = node }) = case node of
(ASTVector _) -> return ast
_ -> throwL (astPos ast) $ show node ++ " is not a vector"
assertIsASTString :: AST -> LContext AST
assertIsASTString ast@(AST { astNode = node }) = case node of
(ASTString _) -> return ast
_ -> throwL (astPos ast) $ show node ++ " is not a string"
assertIsASTFunctionCall :: AST -> LContext AST
assertIsASTFunctionCall ast@(AST { astNode = node }) = case node of
(ASTFunctionCall _) -> return ast
_ -> throwL (astPos ast) $ show node ++ " is not a function call or body"
-- UTILS
(.>) :: (a -> b) -> (b -> c) -> a -> c
(.>) = flip (.)
($>) :: b -> (b -> c) -> c
($>) = flip ($)
infixr 6 $>
oddElems :: [a] -> [a]
oddElems [] = []
oddElems (x:xs) = x:evenElems xs
evenElems :: [a] -> [a]
evenElems [] = []
evenElems (_:xs) = oddElems xs
throwL :: String -> String -> LContext a
throwL p s = throwError $ LException mp s
where mp = if p == "" then Nothing else Just p
asPairsM :: [a] -> LContext [(a, a)]
asPairsM [] = return []
asPairsM (a:b:rest) = do
restPaired <- asPairsM rest
return $ (a, b) : restPaired
asPairsM _ = throwL "" "odd number of elements to pair up"
asPairs :: [a] -> [(a, a)]
asPairs [] = []
asPairs (a:b:rest) =
let restPaired = asPairs rest
in (a, b) : restPaired
asPairs _ = error "odd number of elements to pair up"
makeNonsenseToken :: String -> Token
makeNonsenseToken content =
Token { tokenContent = content, tokenRow = -1, tokenColumn = -1, tokenFileName = "nonsense" }
makeNonsenseAST :: ASTNode -> AST
makeNonsenseAST node =
AST { astNode = node, astRow = -1, astColumn = -1, astFileName = "nonsense"}
astPos :: AST -> String
astPos AST { astRow = r, astColumn = c, astFileName = f } = f ++ ":" ++ show r ++ ":" ++ show c
tokenPos :: Token -> String
tokenPos Token { tokenRow = r, tokenColumn = c, tokenFileName = f } = f ++ ":" ++ show r ++ ":" ++ show c
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