[Haskell-cafe] Re: [Haskell] ANN: haskell-src-exts 1.0.0 rc1 (aka 0.5.2)

[Sebastian Fischer]

On Jun 17, 2009, at 12:43 AM, Niklas Broberg wrote:

> Testing it is
> really easy, four simple steps:
>
>> cabal install haskell-src-exts
> [...]
>> ghci
> [...]
> Prelude> :m Language.Haskell.Exts
> Prelude Language.Haskell.Exts> parseFile "YourFileHere.(l)hs"

This script may even simplify testing of large code bases:

-------
#! /usr/bin/env runhaskell

 > import System
 > import System.IO
 > import Data.Char
 > import Language.Haskell.Exts
 >
 > import Prelude hiding ( catch )
 > import Control.Exception ( catch, SomeException )
 >
 > main = getArgs >>= mapM_ parse
 >  where parse file = do hSetBuffering stdout NoBuffering
 >                        putStr $ file ++ ": "
 >                        catch (parseFile file >>= putStr . check) $
 >                         \e -> print (e :: SomeException)
 >         where check (ParseOk _)           = replicate (2+length  
file) '\b'
 >               check (ParseFailed loc msg) = unlines [err]
 >                where err = msg ++ " at " ++
 >                            show (srcLine loc) ++ ":" ++
 >                            show (srcColumn loc)
-------

After making it executable you can run it as shell script and pass  
names of Haskell files -- (something like) this will check all Haskell  
files (literate or not) in your home directory:

    find ~ -name "*hs" | xargs parse-haskell.lhs

Cheers,
Sebastian

-- 
Underestimating the novelty of the future is a time-honored tradition.
(D.G.)