Hi Serge, I think what you are looking for is putStr:
ghci> putStr "Test\nhere" Test here Thanks Neil On 1/12/08, Serge D. Mechveliani <[EMAIL PROTECTED]> wrote: > People, > > I have a question about usage of `show' in the GHCi dialogue system. > > I introduce my user class DShow, trying to improve the class Show of > Haskell-98. For example, I program > > --------------------------- > class DShow a where dShow :: ShowOptions -> a -> String > ... > main = let listOfListPairs = [ ([1,2,3], [] ), > ([4,5,6], [7] ), > ([9,8,0], [0,0,0]) > ] :: [ ([Int], [Int]) ] > opts = ShowOptions {verbosity = 2, > listSepator = ", \n\n", > fieldSeparator = ", \n"} > in > putStr (dShow opts listOfListPairs) > --------------------------- > > Then, the command ./Main outputs > > ----------------------- > [([1, 2, 3], []), > > ([4, 5, 6], [7]), > > ([9, 8, 0], [0, 0, 0])] > ----------------------- > > This way of the output format control by dShow and ShowOptions is my goal. > But the command > > > main > > in the ghci interpreter outputs something like this: > > "[([1, 2, 3), []),\n\n([4, 5, 6), [7]),\n\n([9, 8, 0],\n\n[0, 0, 0])]" > > How can the user force ghci to output the same output format as in > the case of ./Main > (how to interprete '\n') ? > > 1. If we give to the interpreter the line > > > listOfListPairs > > , then the ghci dialogue system does interprete the NewLine > characters on output as needed -- > only for the value of (show listOfListPairs). > And I need it for the value of (dShow opts listOfListPairs). > Is there any way to substitute a user function instead of `show' in the > ghci output? (and dShow has additional argument ...). > > 2. Which function outputs a string in the ghci dialogue system? > Can the user make this function to interprete the NewLine character > in the argument string? > > Thank you in advance for your explanation. > > ----------------- > Serge Mechveliani > [EMAIL PROTECTED] > > _______________________________________________ > Glasgow-haskell-users mailing list > Glasgow-haskell-users@haskell.org > http://www.haskell.org/mailman/listinfo/glasgow-haskell-users > _______________________________________________ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users