blob: 5beb0e422d37563bcd5fcf06891a3953a861da62 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
module Main where
import Control.Monad
import Data.Either
import Data.Maybe
import System.Console.Readline
import Simplify
import Parser
import PrettyPrint
repl :: IO ()
repl = do
mline <- readline "> "
case mline of
Nothing -> return () -- EOF
Just "" -> repl
Just line -> do
addHistory line
let eexpr = parseExpression line
either (putStrLn . ("Error: "++)) handleExpression eexpr
repl
where
handleExpression expr = do
print expr
let sim = simplify expr
print sim
main :: IO ()
main = repl
|