November 2001 - Hugs-Bugs

OSX
by Michel Schellekens 25 Oct '02

25 Oct '02

After downloading the OSX version, and typing "hugs" to start up the language, I obtain the following error: [schellekens:~] mpcs% hugs dyld: hugs can't open library: /usr/lib/libncurses.5.dylib (No such file or directory, errno = 2) Any suggestions? Michel.

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Type-checker bug
by John Hughes 07 Dec '01

07 Dec '01

The program below produces this error message (with -98 in the February 2001 version): ERROR Bug.hs:5 - Instance of Num Int required for definition of f Pardon? data T class C a b | b->a where m :: a -> (Bool, b) instance C Int T instance C a b => C [a] [b] f () = located :: [T] where (_,located) = m [0]

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Functional dependencies
by Josef Svenningsson 06 Dec '01

06 Dec '01

Hi! It seems as the functional dependencies are not working as well as they should. Suppose I have the following class: \begin{code} class A a b | a -> b where foo :: a b \end{code} and then I declare the following type: \begin{code} newtype Foo = Bar (forall a b. A a b => a Int) \end{code} Loading this in hugs gives the following error message: ERROR HugsBug.lhs:9 - Ambiguous type signature in type component *** ambiguous type : A a b => a Int But the type is clearly not ambiguous since the functional dependency determines b whenever a is known. /Josef

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Hugs feb 01
by Frank Dellaert 06 Dec '01

06 Dec '01

Hi I'm considering whether to use Hugs in a class this spring, but it would be significantly better if the graphics library would work. Is there an ETA on when that will work ? Cheers Frank -Frank Dellaert (dellaert(a)cc.gatech.edu)

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Hugs98 under Linux
by Nickolay Kolev 28 Nov '01

28 Nov '01

Dear Sirs, I installed HUGS98 under Suse 7.3 and was disapppointed to find out that the arrow keys are not functioning as they are supposed to. Instead pressing any of them displays a number of characters - usually [[A or [[B. I can´t navigate between characters, nor can i call up previously used prompts, which annoys me a lot scince i know it can be done (i had been using Hugs98 under Windows before i changed to Linux). Do you know asolutin to this problem. I am pretty new to Lnux so any help will be appreciated. Thanks a lot in advance, Nickolay kolev -- GMX - Die Kommunikationsplattform im Internet. http://www.gmx.net

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INFORMA��O
by imajina.ne 28 Nov '01

28 Nov '01

Caros Sr.s Como freelancer, gostaria de colocar a V/ disposição os meus conhecimentos no desenvolvimento de conteudos multimedia, quer paginas de internet, cd-cards ou mesmo cd's de apresentação, realizados sempre com recurso a novas tecnologias, tal como o FLASH da macromedia. Visitem o meu site, http://www.imajina.net , bem como os trabalhos ja realizados. Trabalho quer para agencias quer para particulares. Trabalhos sempre sujeitos a orçamento. Sempre ao V/ dispor, Helder Pereira Telef. - 256084579

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INFORMA��O
by imajina.ne 28 Nov '01

28 Nov '01

Caros Sr.s Como freelancer, gostaria de colocar a V/ disposição os meus conhecimentos no desenvolvimento de conteudos multimedia, quer paginas de internet, cd-cards ou mesmo cd's de apresentação, realizados sempre com recurso a novas tecnologias, tal como o FLASH da macromedia. Visitem o meu site, http://www.imajina.net , bem como os trabalhos ja realizados. Trabalho quer para agencias quer para particulares. Trabalhos sempre sujeitos a orçamento. Sempre ao V/ dispor, Helder Pereira Telef. - 256084579

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Re:
by Felix 28 Nov '01

28 Nov '01

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by FreeEmailSoftware1＠yahoo.com 25 Nov '01

25 Nov '01

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WWW.HASKELL.ORG
by Christine Hall 25 Nov '01

25 Nov '01

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