RE: [nhc-bugs] Exporting class methods

On 15 April 2005 17:26, Malcolm Wallace wrote:

Yes, pretty-much all of these rely on significant extensions to Haskell'98.

Nah, many of these are implementable without changing the compiler:

Ian Lynagh writes:

...

Control.Exception (bracket_, catch, block, unblock catchJust, Exception(IOException) catchDyn, throwDynTo, bracket, ioErrors, finally )

Needs exception support, of course

...

Control.Concurrent ( ThreadId, myThreadId ) Control.Concurrent.MVar (MVar, modifyMVar_, swapMVar, newMVar)

Easy (no forkIO)

...

System.Posix.IO (fdToHandle)

nhc98 must have something like this already.

...

System.Posix.Types ( Fd(Fd) ) System.IO ( hPutBuf, hGetBuf, hIsTerminalDevice ) -- claims to be portable! System.Posix (getFileStatus, setFileMode, unionFileModes, ownerExecuteMode, groupExecuteMode, fileMode EpochTime, modificationTime, sleep, FileOffset, fileSize, setFileTimes, epochTime)

All implementable using the FFI only

...

Control.Monad.Reader (Reader, runReader, ask, local) Control.Monad.Error (instance MonadPlus IO)

These have H98 implementations, as far as I'm aware.

...

Also, unboxed arrays of Int32, Bool, Int and STUArrays of Int and Bool (plus runST, mutable array functions, unsafeFreeze, etc).

Ok, MArray and IArray need MPTC, but you don't actually need unboxed arrays (Hugs provides these). Cheers, Simon