[Haskell-cafe] Re: Language.Haskell and strings

Ed, thanks for your code. However, I need to use something that fits inside the whole pretty-print engine. I would like to call parseModule in some string of Haskell code and get it nicely typed, with those big strings inside. Best, Maurício

I'm not a Haskell expert but here the solution to your problem that I can think of.

import Data.List

prettyStr :: Int -> String -> IO () prettyStr maxlen str = do putStr ("\"" ++ head brokenStr) mapM_ (\str -> putStr ("\\\n\\" ++ str)) (tail brokenStr) putStr "\"\n" where brokenStr = map (snd.unzip) $ groupBy (\_ (i,_) -> i `mod` maxlen /= 0) $ zip [0..] str

Ed

On Sat, Sep 20, 2008 at 4:14 PM, Maurí­cio mailto:briqueabraque@yahoo.com> wrote:

Hi,

I'm using Language.Haskell.* and would like to know if it's possible to pretty-print big strings like this:

"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"

into something like this:

"aaaaaaaa\ \aaaaaaaa\ \aaaaaaaa\ \aaaaaaaa\ \aaaaaaaa\ \aaaaaaaa\ \aaaaaaaa"

to respect the limit on number of columns. Can you help me? Is it possible to do that?

Thanks, Maurício

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