Adding a REPL

app/Main.hs

@@ -1,6 +1,19 @@
 module Main where
 
 import Lib
+import System.Console.Haskeline
+    ( defaultSettings, getInputLine, outputStrLn, runInputT, InputT )
+import BasicParser
+import LispParser
 
 main :: IO ()
-main = someFunc
+main = runInputT defaultSettings loop
+   where
+       loop :: InputT IO ()
+       loop = do
+           minput <- getInputLine " > "
+           case minput of
+               Nothing -> return ()
+               Just "exit" -> return ()
+               Just "quit" -> return ()
+               Just input -> (outputStrLn . show $ parse pLisp input) >> loop

hal.cabal

@@ -35,6 +35,7 @@ library
       src
   build-depends:
       base >=4.7 && <5
+    , haskeline
   default-language: Haskell2010
 
 executable hal-exe
@@ -47,6 +48,7 @@ executable hal-exe
   build-depends:
       base >=4.7 && <5
     , hal
+    , haskeline
   default-language: Haskell2010
 
 test-suite hal-test
@@ -61,4 +63,5 @@ test-suite hal-test
       HUnit
     , base >=4.7 && <5
     , hal
+    , haskeline
   default-language: Haskell2010

package.yaml

@@ -21,6 +21,7 @@ description:         Please see the README on GitHub at <https://github.com/Anon
 
 dependencies:
 - base >= 4.7 && < 5
+- haskeline
 
 library:
   source-dirs: src

src/LispParser.hs

@@ -16,4 +16,4 @@ pSExpr :: Parser SExpr
 pSExpr = pCharIf (== '(') *> (SExpr <$> some (tokenify pAtom)) <* pCharIf (== ')')
 
 pLisp :: Parser [SExpr]
-pLisp = some $ tokenify pSExpr
+pLisp = some $ tokenify pSExpr