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module Main where
import Control.Monad
import Control.Monad.Except
import Data.Either
import System.Environment
import System.Exit
import qualified LLVM.General as General
import qualified LLVM.General.Context as General
-- import qualified LLVM.General.Target as General
import Check
import Codegen
import Parser
import PShow
fromLeft :: Either a b -> a
fromLeft (Left a) = a
fromLeft (Right _) = error "Either is not a Left"
fromRight :: Either a b -> b
fromRight (Right b) = b
fromRight (Left _) = error "Either is not a Right"
dieShow :: (Show a) => a -> IO ()
dieShow = die . show
assert :: ExceptT String IO a -> IO a
assert ex = do
e <- runExceptT ex
either die return e >> (return $ (\(Right r) -> r) e)
main :: IO ()
main = do
args <- getArgs
when (length args /= 1) $ die "Pass NL file name as a command-line parameter"
let fname = args !! 0
parseResult <- (\file -> parseProgram file fname) <$> readFile fname
when (isLeft parseResult) $ dieShow $ fromLeft parseResult
let ast = fromRight parseResult
putStrLn $ pshow ast
checked <- either die return $ checkProgram ast
putStrLn "After checking:"
putStrLn $ pshow checked
llvmMod <- either die return $ codegen checked "Module" fname
-- putStrLn "Module:"
-- print llvmMod
General.withContext $ \context -> do
assert $ General.withModuleFromAST context llvmMod $ \genmod -> do
llvmasm <- General.moduleLLVMAssembly genmod
putStr llvmasm
putStrLn ""
-- assert $ General.withHostTargetMachine $ \machine -> do
-- General.getTargetMachineTriple machine >>= putStrLn
-- putStrLn ""
-- assert (General.moduleTargetAssembly machine genmod)
-- >>= putStr
-- bs <- assert $ General.moduleObject machine genmod
-- BS.writeFile "output_gen.o" bs
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