module Main where

import Lambda.Par
import Lambda.Print
import Lambda.ErrM

import TypeChecker

main = do
    s <- getContents
    mapM_ action $ lines s

action s =
    case pExp $ myLexer s of
	Ok e	-> do
	    putStrLn ""
	    putStrLn $ printTree e
	    case runTC $ infer e of
		Left e	-> do
		    putStrLn $ "ERROR " ++ displayError e
		Right t ->
		    putStrLn $ "OK " ++ printTree t
	Bad err -> putStrLn err