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import Pipes
import Pipes.Text.IO (fromHandle)
import Pipes.Attoparsec (parsed)
import qualified System.IO as IO
import Data.Attoparsec.Text
import Control.Applicative
data Test = Test {
a :: Int,
b :: Int
} deriving (Show)
testParser :: Parser Test
testParser = do
a <- decimal
space
b <- decimal
endOfLine
return $ Test a b
main = IO.withFile "./testfile" IO.ReadMode $ \handle -> runEffect $
for (parsed testParser (fromHandle handle))
(lift . print)
-- >>> :! cat testfile
-- 1 1
-- 2 2
-- 3 3
-- 4 4
-- 5 5
-- 6 6
-- 7 7
-- 8 8
-- 9 9
-- 10 10
-- >>> main
-- Test {a = 1, b = 1}
-- Test {a = 2, b = 2}
-- Test {a = 3, b = 3}
-- Test {a = 4, b = 4}
-- Test {a = 5, b = 5}
-- Test {a = 6, b = 6}
-- Test {a = 7, b = 7}
-- Test {a = 8, b = 8}
-- Test {a = 9, b = 9}
-- Test {a = 10, b = 10}
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