/usr/share/doc/happy/examples/glr/packing/Main.lhs is in happy 1.19.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | > module Main where
> import System(getArgs)
> import Data.Maybe(fromJust)
> import qualified Data.Map as Map
> import Expr
#include "DV_lhs"
This requires CPP / preprocessing; use Hugs.lhs for tests with Hugs
> main
> = do
> [s] <- getArgs
> case doParse $ map (:[]) $ lexer s of
> ParseOK r f -> do
> putStrLn $ "Ok " ++ show r ++ "\n"
> ++ unlines (map show $ Map.toList f)
> toDV $ Map.toList f
> ParseEOF f -> do
> putStrLn $ "Premature end of input:\n"
> ++ unlines (map show $ Map.toList f)
> toDV $ Map.toList f
> ParseError ts f -> do
> putStrLn $ "Error: " ++ show ts
> toDV $ Map.toList f
> forest_lookup f i
> = fromJust $ Map.lookup f i
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