Use System.IO.UTF8 only if ghc < 6.12.

GHC >= 6.12 (base >= 4.2) uses iconv to convert to unicode
Strings.

git-svn-id: https://pandoc.googlecode.com/svn/trunk@1748 788f1e2b-df1e-0410-8736-df70ead52e1b

src/Text/Pandoc.hs

@@ -36,14 +36,16 @@ inline links:
 
 > module Main where
 > import Text.Pandoc
-> import qualified System.IO.UTF8 as U
+> -- include the following two lines only if you're using ghc < 6.12:
+> import Prelude hiding (getContents, putStrLn)
+> import System.IO.UTF8
 >
 > markdownToRST :: String -> String
 > markdownToRST =
 >   (writeRST defaultWriterOptions {writerReferenceLinks = True}) .
 >   readMarkdown defaultParserState
 > 
-> main = U.getContents >>= U.putStrLn . markdownToRST
+> main = getContents >>= putStrLn . markdownToRST
 
 Note:  all of the readers assume that the input text has @'\n'@
 line endings.  So if you get your input text from a web form,

src/Text/Pandoc/Shared.hs

@@ -119,8 +119,13 @@ import Data.List ( find, isPrefixOf, intercalate )
 import Network.URI ( parseURI, URI (..), isAllowedInURI )
 import System.Directory
 import System.FilePath ( FilePath, (</>) )
-import Prelude hiding ( putStrLn, writeFile, readFile, getContents )
+-- Note: ghc >= 6.12 (base >=4.2) supports unicode through iconv
+-- So we use System.IO.UTF8 only if we have an earlier version
+#if MIN_VERSION_base(4,2,0)
+#else
+import Prelude hiding ( putStr, putStrLn, writeFile, readFile, getContents )
 import System.IO.UTF8
+#endif
 import Data.Generics
 import qualified Control.Monad.State as S
 import Control.Monad (join)

src/hsmarkdown.hs

@@ -29,8 +29,13 @@ Wrapper around pandoc that emulates Markdown.pl as closely as possible.
 module Main where
 import System.Process
 import System.Environment ( getArgs )
+-- Note: ghc >= 6.12 (base >=4.2) supports unicode through iconv
+-- So we use System.IO.UTF8 only if we have an earlier version
+#if MIN_VERSION_base(4,2,0)
+#else
 import Prelude hiding ( putStr, putStrLn, writeFile, readFile, getContents )
 import System.IO.UTF8
+#endif
 import Control.Monad (forM_)
 
 main :: IO ()

src/markdown2pdf.hs

@@ -9,8 +9,14 @@ import Control.Exception (tryJust, bracket)
 import System.IO (stderr)
 import System.IO.Error (isDoesNotExistError)
 import System.Environment ( getArgs, getProgName )
+-- Note: ghc >= 6.12 (base >=4.2) supports unicode through iconv
+-- So we use System.IO.UTF8 only if we have an earlier version
+#if MIN_VERSION_base(4,2,0)
+#else
 import Prelude hiding ( putStr, putStrLn, writeFile, readFile, getContents )
 import System.IO.UTF8
+#endif
+import System.IO (hPutStrLn)
 import System.Exit (ExitCode (..), exitWith)
 import System.FilePath
 import System.Directory

src/pandoc.hs

@@ -45,9 +45,14 @@ import System.Console.GetOpt
 import Data.Maybe ( fromMaybe )
 import Data.Char ( toLower )
 import Data.List ( intercalate, isSuffixOf )
+import System.IO ( stdout, stderr, hPutStrLn, hPutStr )
+-- Note: ghc >= 6.12 (base >=4.2) supports unicode through iconv
+-- So we use System.IO.UTF8 only if we have an earlier version
+#if MIN_VERSION_base(4,2,0)
+#else
 import Prelude hiding ( putStr, putStrLn, writeFile, readFile, getContents )
-import System.IO ( stdout, stderr )
 import System.IO.UTF8
+#endif
 #ifdef _CITEPROC
 import Text.CSL
 import Text.Pandoc.Biblio