- Hugs-Users - Haskell.org

Re: WinHugs
by Neil Mitchell 04 Oct '10

04 Oct '10

Hi Han-Hing, I'm afraid I don't run WinHugs anymore, and have never run the OpenGL portions. Perhaps someone on the Hugs user list can help? Thanks, Neil On Mon, Oct 4, 2010 at 12:39 PM, Han-Hing Dang <h.dang(a)informatik.uni-augsburg.de> wrote: > Dear Neil Mitchell, > > i found your email address on the internet while trying to find someone who > can help me with getting WinHugs to run. I'm trying to get WinHugs to work > with the Graphics.HGL library included in the release of Sep 2006. I hope > you > might help me with the following problem: > > My problem is that WinHugs always crashes when I'm running the GTest.hs file > with the command "rg w3" or "rg w8". WinHugs crashes when the pop-up window > closes after finishing. Do you have any idea what can be done about that ? > > I think that problem should not depend on my machine since i am running a > Windows 7 OS, but the same occurs on other Windows XP systems. I hope that > problem has already occured to other users but if you have any further > question about my setting or the like please feel free to ask me. > > Thank you very much for any helpful comment in advance! > Best regards, > > Han-Hing > > -- > ******************************************************************* > Han-Hing Dang > Universität Augsburg > Fakultät für Angewandte Informatik > Universitätsstraße 14 > 86135 Augsburg, Germany > http://www.informatik.uni-augsburg.de/lehrstuehle/dbis/pmi/staff/dang/ > > Tel. +49 (0)821/598 3109 > Fax +49 (0)821/598 2274 > ******************************************************************* >

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unicode support
by Rustom Mody 27 Jul '10

27 Jul '10

Hello. How significant would the changes to hugs be if I want to incorporate unrestricted unicode in hugs source as in jhc and ghc -fglasgow-exts support? [See http://hackage.haskell.org/trac/haskell-prime/wiki/UnicodeInHaskellSource ] Thanks Rustom

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Anyone have hugs version of gofer modular-interpreter code?
by Larry Evans 30 Jun '10

30 Jun '10

Page 2 of: http://www.cs.yale.edu/~liang-sheng/popl95.ps.gz says the source code is at: nebula.cs.yale.edu/pub/yale-fp/modular-interpreter However, that's no longer present. Since Hugs is the successor to gofer, I was wondering if anyone could tell me how to get a copy of the corresponding hugs code. TIA. -Larry

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stack overflow in tail recursive function
by Bruno Schneider 24 Mar '10

24 Mar '10

Hi all, I have this tail recursive factorial function: factorial :: Integer -> Integer factorial 0 = 1 factorial n = fat' n 1 where fat' 1 fat = fat fat' n fat = fat' (n-1) (n*fat) Whenever I run it with a number of 20000 or more I get a stack overflow error. It doesn't seem a problem with the large resulting number because, if so, the message should be something like "Garbage collection fails to reclaim sufficient space". Other functions seem to able to handle a larger number of recursive calls. So, what is the problem with this particular function? -- Bruno Schneider http://www.dcc.ufla.br/~bruno/

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Scoping inconsistency in ghci
by Ahn, Ki Yung 24 Nov '09

24 Nov '09

Running ghci without any option or scripts to load, I've experienced some inconsistencies prelude List.\\ and List.(\\) . The former is in scope, but the latter is not. This seem strange. My expectation is that neither of them should be in scope unless we load the List module with with the :m command. I'm using Debian distribution of GHC 6.10.4, and here is an example run of ghci to show this issue. kyagrd@kyagrd:~/tmp$ ghci GHCi, version 6.10.4: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer ... linking ... done. Loading package base ... linking ... done. Prelude> [1,2,3,4] List.\\ [1,3] [2,4] Prelude> List.(\\) [1,2,3,4] [1,3] <interactive>:1:0: Not in scope: data constructor `List' <interactive>:1:5: Not in scope: `\\' Prelude> :q Leaving GHCi. kyagrd@kyagrd:~/tmp$ ghc --version The Glorious Glasgow Haskell Compilation System, version 6.10.4 kyagrd@kyagrd:~/tmp$ uname -a Linux kyagrd 2.6.30-2-686 #1 SMP Sat Sep 26 01:16:22 UTC 2009 i686 GNU/Linux

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the built-in function enumFrom
by Paqui Lucio 29 Oct '09

29 Oct '09

Hi, In Prelude.hs you can find the definition enumFrom x = map toEnum [ fromEnum x ..] Load a file.hs of just one line: data TBool = Falsity | Undefined |Truth deriving (Enum, Show) Then, I evaluate enumFrom Falsity and, as expected, it gives [Falsity,Undefined,Truth] However, the expression map toEnum [ fromEnum Falsity ..] gives first an ambiguity problem and then the problem I expected Main> map toEnum [ fromEnum Falsity ..] ERROR - Unresolved overloading *** Type : Enum a => [a] *** Expression : map toEnum (enumFrom (fromEnum Falsity)) Main> map toEnum [ fromEnum Falsity ..]::[TBool] [Falsity,Undefined,Truth, Program error: {_toEnum TBool_Falsity 3} (98 reductions, 301 cells) Why the function enumFrom works perfectly in spite of its erroneous definition? Thanks in advance, Paqui P.D. I am using the || || || || || || ||__ Hugs 98: Based on the Haskell 98 standard ||___|| ||__|| ||__|| __|| Copyright (c) 1994-2002 ||---|| ___|| World Wide Web: http://haskell.org/hugs || || Report bugs to: hugs-bugs(a)haskell.org || || Version: Nov 2002 --------------------------------- Paqui Lucio Dpto de LSI Facultad de Informática Paseo Manuel de Lardizabal, 1 20080-San Sebastián SPAIN --------------------------------- e-mail: paqui.lucio(a)ehu.es Tfn: (+34) (9)43 015049 Fax: (+34) (9)43 015590 Web: http://www.sc.ehu.es/paqui ---------------------------------

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Re: [Hugs-users] Opening text editor
by Irfon-Kim Ahmad 21 Oct '09

21 Oct '09

Daniel Fischer wrote: > Am Sonntag 27 September 2009 01:16:12 schrieb John Vitale: > >> I have downloaded and installed... and reinstalled winhugs to my computer.. >> it works fine but the text editor that opens up by default is notepad... >> does winhugs come with a text editor of it's own? If so what is it? if >> not what would you suggest? My university has a completely different text >> editor when i use it there and i would love to have that same thing for >> here. >> > > There must be a way to set the default editor. I don't know how WinHugs behaves, though > it's probably the same as Hugs. > The default default-editor there is what your EDITOR environment variable says (may be > called slightly differently on Windows). > You can change that by > > :set -E/usr/bin/myeditor > > (on Windows, more likely > :set -E"C:\Programs and Applications\ed") > > in (win)hugs. > That isn't permanent, however, so you'd want to put that line into your ~/.hugs > (~/.winhugs) file so that the editor is set on every startup. > Or change the environment variable to your preferred editor (a reasonable thing to do > anyway). > > In WinHugs, you set the editor by going to File | Options and on the "WinHugs" tab, there's a section called "Editor". It's actually really hard to miss. Given that the only built-in options it offers are "Notepad" and "Custom", it's safe to conclude that it doesn't ship with any other editor. I use Programmer's Notepad 2, which is available as freeware. Someone has posted a syntax highlighting definition set for PN2 here: http://compsci.ca/v3/viewtopic.php?t=14630 I have not tried it myself.

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Haskell Problem
by hitesh bindal 11 Oct '09

11 Oct '09

Hello Sir, This is hitesh, i am a final year student pursuing B.E IT, kindly help me with the solution for the haskell question mentioned on the following link http://www.haskell.org/pipermail/hugs-users/2009-June.txt waiting for ur positively repy Keep up with people you care about with Yahoo! India Mail. Learn how. http://in.overview.mail.yahoo.com/connectmore

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Query
by Ankit Bansal 11 Oct '09

11 Oct '09

Does Any one has a solution of " http://www.haskell.org/pipermail/hugs-users/2009-June.txt" Post...if u have can u please send me.... -- Read it carefully Warms Regards Ankit Bansal ankit.apiit(a)gmail.com 9996208000

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Opening text editor
by John Vitale 26 Sep '09

26 Sep '09

I have downloaded and installed... and reinstalled winhugs to my computer.. it works fine but the text editor that opens up by default is notepad... does winhugs come with a text editor of it's own? If so what is it? if not what would you suggest? My university has a completely different text editor when i use it there and i would love to have that same thing for here.

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