March 2004 - Hugs-Users

Re: [Haskell] Hugs Nov2003 X Nov2002
by Ross Paterson 17 Mar '04

17 Mar '04

[redirected to hugs-users] On Tue, Mar 16, 2004 at 11:46:50PM -0000, Stenio wrote: > It is strange because fromInt works in the hugs prompt But when I use it in my > haskell script it doesn´t work. > > Prelude>fromInt 5 :: Float (ok!) > > but > > average :: Int -> Float > average n = fromInt ( sum n ) :: Float / fromInt n :: Float > > doesn´t work... > > fromInteger works in hugs prompt and inside the haskell script too. It's an accident (and arguably a bug) that it works at the prompt. It happens because at the prompt you're inside the current module, and when you don't have any module loaded, the Prelude is the current module. It would be more consistent to make the default current module an empty one instead of the Prelude, so you wouldn't see fromInt there either. Bottom line: fromInt and other non-Haskell 98 things aren't supposed to be available.

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Re: [Haskell] Hugs Nov2003 X Nov2002
by Ross Paterson 16 Mar '04

16 Mar '04

[moved to hugs-users] On Tue, Mar 16, 2004 at 08:03:55AM -0000, Stenio wrote: > I was using Hugs November 2002 and the function fromInt works fine, > but in the version November 2003 the same function doesn´t work. The > same happens with the functions ord and chr. But in this case I find > the solution, chr and ord are in the module Char in version November > 2003 so I have to do : import Char in my Haskell script. Both these incompatibilities result from the Nov 2003 release being more strictly compliant with Haskell 98: - chr and ord are exported by Char, not (any longer) from Prelude. - fromInt, toInt, etc are no longer exported by the Prelude: use fromIntegral instead.

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[Hugs-users] Program code storage space exhausted - Hdoc, Hadockk...
by Thomas Anberree 12 Mar '04

12 Mar '04

here is what I get when trying to install: Hdoc after having typed: ./hdoc-hugs.sh in cygwin __ __ __ __ ____ ___ _______________________________________________ || || || || || || ||__ Hugs 98: Based on the Haskell 98 standard ||___|| ||__|| ||__|| __|| Copyright (c) 1994-2003 ||---|| ___|| World Wide Web: http://haskell.org/hugs || || Report bugs to: hugs-bugs(a)haskell.org || || Version: Nov 2003 _______________________________________________ Hugs mode: Restart with command line option +98 for Haskell 98 mode ERROR "Main.hs" - Program code storage space exhausted Version> --------------- I'd like to install either Hdoc or Hadock to document programs I write using Haskell but I've had a real hard time understanding how to install either of these. I tried both in Windows and Solaris, but I'd rather have these using Windows. I you know about this, or any way to document Haskell modules using Hugs98... Thank you for any help Thomas Anberree

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Error when opening Hugs for Windows
by Thomas Anberree 08 Mar '04

08 Mar '04

Hello, I've just installed WinHugs on a machine running Windows 2000, using: hugs98-Nov2003-2.msi When opening WinHugs, the GUI opens but prompt: Warning: unknown toggle `F'; ignoring. ERROR- a closing quote, '"', was expected then a message box pops, prompting: FATAL ERROR: Unable to load Prelude then it closes. I also installed the same version with the same installer on a machine running Windows XP and it worked perfectly. What should I do to fix this? Thanks Thomas

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