{- FOURMOLU_DISABLE -}
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-- of this software and associated documentation files (the "Software"), to deal
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-- SOFTWARE.
{- FOURMOLU_ENABLE -}
module Language.EO.Phi (
  defaultMain,
  normalize,
  parseProgram,
  unsafeParseObject,
  unsafeParseProgram,
  module Language.EO.Phi.Syntax,
) where

import System.Exit (exitFailure)

import Language.EO.Phi.Syntax.Abs qualified as Phi
import Language.EO.Phi.Syntax.Par qualified as Phi

import Language.EO.Phi.Normalize
import Language.EO.Phi.Syntax

-- | Parse a 'Program' or return a parsing error.
parseProgram :: String -> Either String Phi.Program
parseProgram :: String -> Either String Program
parseProgram String
input = [Token] -> Either String Program
Phi.pProgram [Token]
tokens
 where
  tokens :: [Token]
tokens = String -> [Token]
Phi.myLexer String
input

-- | Parse an 'Object' or return a parsing error.
parseObject :: String -> Either String Phi.Object
parseObject :: String -> Either String Object
parseObject = [Token] -> Either String Object
Phi.pObject ([Token] -> Either String Object)
-> (String -> [Token]) -> String -> Either String Object
forall b c a. (b -> c) -> (a -> b) -> a -> c
. String -> [Token]
Phi.myLexer

-- | Parse a 'Program' from a 'String'.
-- May throw an 'error` if input has a syntactical or lexical errors.
unsafeParseProgram :: String -> Phi.Program
unsafeParseProgram :: String -> Program
unsafeParseProgram String
input =
  case String -> Either String Program
parseProgram String
input of
    Left String
parseError -> String -> Program
forall a. HasCallStack => String -> a
error String
parseError
    Right Program
program -> Program
program

-- | Parse an 'Object' from a 'String'.
-- May throw an 'error` if input has a syntactical or lexical errors.
unsafeParseObject :: String -> Phi.Object
unsafeParseObject :: String -> Object
unsafeParseObject = (String -> Object)
-> (Object -> Object) -> Either String Object -> Object
forall a c b. (a -> c) -> (b -> c) -> Either a b -> c
either String -> Object
forall a. HasCallStack => String -> a
error Object -> Object
forall a. a -> a
id (Either String Object -> Object)
-> (String -> Either String Object) -> String -> Object
forall b c a. (b -> c) -> (a -> b) -> a -> c
. String -> Either String Object
parseObject

-- | Default entry point.
-- Parses a 𝜑-program from standard input, normalizes,
-- then pretty-prints the result to standard output.
defaultMain :: IO ()
defaultMain :: IO ()
defaultMain = do
  String
input <- IO String
getContents -- read entire standard input
  let tokens :: [Token]
tokens = String -> [Token]
Phi.myLexer String
input
  case [Token] -> Either String Program
Phi.pProgram [Token]
tokens of
    Left String
parseError -> do
      String -> IO ()
putStrLn String
parseError
      IO ()
forall a. IO a
exitFailure
    Right Program
program -> do
      String -> IO ()
putStrLn (Program -> String
forall a. Print a => a -> String
printTree (Program -> Program
normalize Program
program))