I'd be happy with these changes.
| -----Original Message-----
| From: Ross Paterson [mailto:ross@soi.city.ac.uk]
| Sent: 04 November 2002 09:52
| To: Simon Peyton-Jones
| Cc: Simon Marlow; Alastair Reid; libraries(a)haskell.org
| Subject: Re: IOError vs. Exception vs. IOException
|
| On Mon, Nov 04, 2002 at 08:57:06AM -0000, Simon Peyton-Jones wrote:
| >
| > | FWIW, I agree with you, and I don't have any objections to
changing it
| > | (but Simon P.J. might).
| >
| > I doubt I'd have an objection. Want to make a concrete proposal to
the
| > libraries list? I didn't get exactly what it was from your
messages.
|
| [redirecting to libraries]
| Two (mostly) independent proposals:
|
| 1) Move bracket and bracket_ from System.IO (or GHC.Exception) to
| haskell98/IO.hs. These two should now never be used anyway (except
| in all-H98 programs), and this would save users of the new
libraries
| from having to hide them.
|
| 2) Define
|
| type IOError = IOException -- was Exception
|
| (or vice versa), leave the type of Prelude.ioError as IOError -> IO
a,
| but add to Control.Exception
|
| throwIO :: Exception -> IO a
|
| If both are done, the only overlap seen by users of the new libraries
| is Prelude.catch vs Control.Exception.catch and System.IO.try vs
| Control.Exception.try. In each case there's a type distinction
| reflecting the semantic distinction.
