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module Frontend where
import Builtins
import Code (Interp(..))
import qualified Compiler as C
import Control.Monad.IO.Class
import Control.Monad.Trans.Class
import Control.Monad.Trans.State.Lazy
import Data.Foldable (traverse_)
import qualified Data.Map as M
import Env
import qualified IR
import qualified Interpreter as I
import qualified Parser as P
import System.Console.Haskeline
import qualified Text.Megaparsec as MP
import Text.Pretty.Simple
ppr :: Show a => a -> PrlgEnv ()
ppr x =
liftIO $
pPrintOpt
CheckColorTty
defaultOutputOptionsDarkBg
{ outputOptionsCompactParens = True
, outputOptionsIndentAmount = 2
, outputOptionsPageWidth = 80
}
x
interpret :: String -> PrlgEnv Bool
interpret = (>> return True) . lex
where
lex input = do
case MP.parse P.lexPrlg "-" input of
Left bundle -> liftIO $ putStr (MP.errorBundlePretty bundle)
Right toks -> parse toks
parse toks = do
case MP.parse P.parsePrlg "-" toks of
Left bundle -> liftIO $ putStr (MP.errorBundlePretty bundle)
Right asts -> traverse_ shunt asts
shunt ast = do
o <- gets ops
case P.shuntPrlg o ast of
Left err -> liftIO $ putStrLn $ "expression parsing: " ++ err
Right prlg -> intern prlg
intern prlgs = do
prlgi <- withStrTable $ \st -> C.internPrlg st prlgs
underscore <- findAtom "_"
prlgv <-
withStrTable $ \st ->
(st, C.variablizePrlg underscore (C.varIds st prlgi) prlgi)
compile prlgv
compile prlgv = do
commaId <- findStruct "," 2
-- TODO cut
let code = C.seqGoals $ C.compileGoals commaId prlgv
execute code
execute code = do
res <- I.prove code
case res of
Left err -> liftIO $ putStrLn err
Right res ->
liftIO $
putStrLn $
if res
then "yes."
else "no proof."
interpreterStart :: PrlgEnv ()
interpreterStart = do
addBuiltins
interpreterLoop
interpreterLoop :: PrlgEnv ()
interpreterLoop = do
minput <- lift $ getInputLine "prlg> "
case minput of
Nothing -> return ()
Just input -> do
continue <- interpret input
if continue
then interpreterLoop
else return ()
interpreter :: InputT IO ()
interpreter =
evalStateT
interpreterStart
(Interp {defs = M.empty, ops = [], strtable = IR.emptystrtable, cur=error "no cur", cho=[]})
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