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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hi<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I am trying to write an XML file where the filename is created based on a timestamp. Simplified version below. This won’t compile – I get this error in doWrite2 <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><i>filepathtest.hs|24 col 17 error| Couldn't match expected type `system-filepath-0.4.7:Filesystem.Path.Internal.FilePath' <o:p></o:p></i></p><p class=MsoNormal><i>|| with actual type `String'<o:p></o:p></i></p><p class=MsoNormal><i>|| In the second argument of `writeFile', namely `t1'<o:p></o:p></i></p><p class=MsoNormal><i>|| In a stmt of a 'do' block: writeFile def t1 doc<o:p></o:p></i></p><p class=MsoNormal><i>|| In the expression:<o:p></o:p></i></p><p class=MsoNormal><i>|| do { t1 <- tsString;<o:p></o:p></i></p><p class=MsoNormal><i>|| writeFile def t1 doc }<o:p></o:p></i></p><p class=MsoNormal><i><o:p> </o:p></i></p><p class=MsoNormal>Somehow the String “text.xml” in doWrite1 is converted into a FilePath, but not the String t1 in doWrite2. What am I doing wrong?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal> {-# LANGUAGE OverloadedStrings #-}<o:p></o:p></p><p class=MsoNormal> module Filepathtest where<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal> import Text.XML<o:p></o:p></p><p class=MsoNormal> import Data.Time.Clock.POSIX (utcTimeToPOSIXSeconds)<o:p></o:p></p><p class=MsoNormal> import Data.Time.Clock (getCurrentTime)<o:p></o:p></p><p class=MsoNormal> import Prelude hiding (writeFile, FilePath)<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal> tsString :: IO String<o:p></o:p></p><p class=MsoNormal> tsString = do<o:p></o:p></p><p class=MsoNormal> x <- getCurrentTime<o:p></o:p></p><p class=MsoNormal> let x' = show $ floor $ utcTimeToPOSIXSeconds x<o:p></o:p></p><p class=MsoNormal> return x'<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal> doWrite1 :: Document -> IO ()<o:p></o:p></p><p class=MsoNormal> doWrite1 doc =<o:p></o:p></p><p class=MsoNormal> writeFile def "test1.xml" doc<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal> doWrite2 :: Document -> IO ()<o:p></o:p></p><p class=MsoNormal> doWrite2 doc = do<o:p></o:p></p><p class=MsoNormal> t1 <- tsString<o:p></o:p></p><p class=MsoNormal> writeFile def t1 doc<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>