- Glasgow-haskell-users

Re: Congrats to Mandrake
by Ashley Yakeley 20 Feb '02

20 Feb '02

At 2002-02-20 00:19, Ketil Z. Malde wrote: >I'm not sure what the point would be, if they are in the >distributions anyway? Actually for me I'm more interested in someone keeping up with the GHC versions with debs. I'm not so worried about where they put them. But actually I just noticed that 5.02.2 is in Debian sid. Thanks to Michael Weber for doing this... -- Ashley Yakeley, Seattle WA

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Re: Congrats to Mandrake
by Ashley Yakeley 20 Feb '02

20 Feb '02

At 2002-02-19 14:13, Duncan Coutts wrote: >So what I mean is, can we have links to more binaries than just Red Hat? >Debian, Mandrake, FreeBSD. (I know these's SuSE) Seconded. If someone would do a 5.02.2 deb, that would be very useful... -- Ashley Yakeley, Seattle WA

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Congrats to Mandrake
by Duncan Coutts 20 Feb '02

20 Feb '02

All, I think that Mandrake deserve thanks for (reasonably) consistently including both hugs and ghc in their Linux distro *as standard*. This could significantly help Haskell takeup amongst the unwashed masses. :-) There should probably be a link on the ghc download page to the mdk binaries. The hugs download page just links directly to the mdk rpmfind pages. http://rpmfind.net/linux/rpm2html/search.php?query=ghc&submit=Search+...&sy… http://rpmfind.net//linux/RPM/cooker/contrib/RPMS/ghc-5.02.2-2mdk.i586.html Duncan

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RE: Strictness information?
by Ashley Yakeley 20 Feb '02

20 Feb '02

At 2002-02-19 09:21, Simon Peyton-Jones wrote: >'V' means 'eValuates'. So your function is strict in both arguments. >It's intended to be internal compiler stuff which is while it's not >properly documented, I'm afraid. I'd quite like to see intelligible .hi files that look like Haskell, even if they are autogenerated... -- Ashley Yakeley, Seattle WA

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Data constructors and pattern matching
by David Feuer 19 Feb '02

19 Feb '02

It seems to me that it might be very useful for a module to export the pattern matching operators for a datatype without exporting the constructors. Suppose we have data A = X {a::Int, b::Float} And we want to maintain the invariant that b is a floating-point representation of a. So normally we would have to use a completely abstract datatype, and provide constructors and destructors. But in this case, it would actually make sense to provide the pattern-matching operator X, but not the data constructor X. So I think it would be good to separate these in the module export syntax. Note: You can get this with views, but it's more clunky that way. David Feuer

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Importing a reference to a non-function entity.
by George Russell 19 Feb '02

19 Feb '02

What is the politically correct way using the FFI and ghc5.03 (which I have just managed to compile from CVS) to import an externally defined object (not a function)? I have a source file containing the line foreign label "default_options" defaultOptions :: CString.CString for which ghc5.03 complains about "Warning: foreign declaration uses deprecated non-standard syntax", but which works anyway. However in my attempt to be a good little ghc user, I try instead foreign import "default_options" defaultOptions :: CString.CString (after deciphering with difficulty the Postscript version of the FFI document on this screen) but still get the deprecated warning. Then I try foreign import ccall "default_options" defaultOptions :: CString.CString and praise be, the deprecated message goes away. Only problem is, I now get a segmentation fault when I run the code . . .

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setFileTimes
by Markus Lauer 19 Feb '02

19 Feb '02

Hi, as the posix module isn't avalible under windows, is there any function to set the modification time of a file or directory under windows with ghc? Thanks, Markus Lauer

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RE: i368-pc-os2-emx port
by Russell O'Connor 19 Feb '02

19 Feb '02

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 One thing I could try would be to see if I can get a version of GHC to run under ODIN (ODIN is a Win32 API implementation under OS/2). Do you think this would be helpful? Or would it lead me down the path of making an OS/2 complier that produced Windows Executables (that would be bad). - -- Russell O'Connor roconnor(a)math.berkeley.edu <http://www.math.berkeley.edu/~roconnor/> ``This is not a time, as it is never a time, to seek vengeance, but a time to seek the courage to forgive'' -- George W. Bush -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (SunOS) Comment: For info see http://www.gnupg.org iD8DBQE8cpifuZUa0PWVyWQRAu2RAKCXVoKOKLLX9Qd2cmSjWgMT/qyFxwCfSH2A dc5wBP4lUe3lTzmb/sknNW4= =63XF -----END PGP SIGNATURE-----

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RE: Strictness information?
by Simon Peyton-Jones 19 Feb '02

19 Feb '02

'V' means 'eValuates'. So your function is strict in both arguments. It's intended to be internal compiler stuff which is while it's not properly documented, I'm afraid. Simon | -----Original Message----- | From: Till Dörges [mailto:mai00dqr@informatik.uni-leipzig.de] | Sent: 17 February 2002 12:44 | To: Glasgow-haskell-users(a)haskell.org | Subject: Strictness information? | | | Hi folks, | | during the struggle for speed of my program, I've tried to | check the strictness of my functions, where most of the time | is consumed. Unluckily the ghc documentation doesn't mention | the strictness-types I found for the most part. :-( | | For the particular function in question it reads in the *.hi file: | | --- snip --- | isSubPosnOf :: Posn -> Posn -> PrelBase.Bool {-## __A 2 __C | __S VV __U (__inline_me (\ a2 :: Posn b :: Posn -> | PrelBase.zaza (zddmzsze1 a2 b) (isPrefixOf b a2))) ##-}; | --- snap --- | | If I understand it correctly I must look at '__S VV', but | what does V mean? (The doc only talks about L,S,E,P,U,A). | | Thanks -- Till | _______________________________________________ | Glasgow-haskell-users mailing list | Glasgow-haskell-users(a)haskell.org | http://www.haskell.org/mailman/listinfo/glasgow-| haskell-users |

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fyi: haskell.org/ghc and Netscape win32 users
by Sigbjorn Finne 18 Feb '02

18 Feb '02

Hi, if you've run into problems installing haskell.org/ghc Windows Installers (.msi files) that you've downloaded with Netscape Navigator in the past couple of weeks, this is to let you know that the (new) web server setup has now been fixed, so downloading with Netscape should again work OK. Thanks to Christian Mann for pointing this out. --sigbjorn

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