- Nhc-users - Haskell.org

_apply1 and _apply2
by Saswat Anand 13 Apr '02

13 Apr '02

Hi, Could you explain when the compiler inserts _apply1 and _apply2. As _apply2 f a b = _apply1 (_apply1 f a) b, how is _apply2 useful? Thanks, Saswat

2 2

-b vs. -p
by Saswat Anand 12 Apr '02

12 Apr '02

Sorry. Here is my Program. module Main(main) where import IOExtras type Var = Int type Val = Int data Assignment = Var := Val deriving (Eq,Show) data Assgn = Tree Assignment [Assgn] deriving (Eq,Show) main = do putStrLn $ "Solutions = " ++ (show $ length $ results (bb [1..9] 9) 9) c <- readIORef counter putStrLn $ "Checks = " ++ show c cc :: [[Assignment]->Bool] -> Assgn -> [Assgn] cc cons t = fun [] 0 t where fun part var (Tree t cs) = let new_ass = part++[t] new_chi = concatMap (fun new_ass (var+1)) cs in if (cons!!var) new_ass then [Tree t new_chi] else [] bb :: [Var] -> Int -> [Assgn] bb vars n = let cons = take n $ (true : [ f a | a <- [2..]]) f a = foldl1 (&) [check a m | m <- [1..a-1]] in concatMap (cc cons) (fun vars) where fun (v:vs) = [Tree (v:=x) (fun vs) | x <- [1..n]] fun [] = [] check :: Int -> Int -> [Assignment] -> Bool check m n ass = safe (ass!!(m-1)) (ass!!(n-1)) true :: [Assignment] -> Bool true _ = True (&) :: ([Assignment]->Bool) -> ([Assignment]->Bool) -> ([Assignment]->Bool) f1 & f2 = \ints -> f1 ints && f2 ints safe :: Assignment -> Assignment -> Bool safe (i:=j) (m:=n) = unsafePerformIO $ do c <- readIORef counter writeIORef counter $! (c+1) return $ not (j==n || i+j==m+n || i-j==m-n) results :: [Assgn] -> Int -> [[Assignment]] results t no= concatMap ((filter (\l->length l == no)).flatten) t where flatten (Tree t []) = [[t]] flatten (Tree t cs) = map (t:) (concatMap flatten cs) counter :: IORef Integer counter = unsafePerformIO $ newIORef (0::Integer)

1 0

binary package for ix86-solaris2 available
by Malcolm Wallace 10 Apr '02

10 Apr '02

Dear nhc-users, Jon Bernard has kindly made a binary package of nhc98-1.12 for Solaris 2.8 on x86 machines. It is available from the usual download page, http://www.cs.york.ac.uk/fp/nhc98/download.html Regards, Malcolm

1 0

Mutable arrays in Haskell 98
by José Romildo Malaquias 27 Mar '02

27 Mar '02

Hello. I would like to use muttable arrays in Haskell 98, with the GHC _and_ NHC98 compilers. By muttable arrays I mean arrays with in-place updates, as with the MArray arrays (which are not Haskell 98 conformant) found in GHC. Is such array implmentation available? Regards. Romildo -- Prof. José Romildo Malaquias Departamento de Computação http://iceb.ufop.br/~romildo Universidade Federal de Ouro Preto romildo(a)iceb.ufop.br Brasil romildo(a)uber.com.br

2 1

Axis of Evil
by Wanted! 20 Mar '02

20 Mar '02

1 0

nhc98 1.12 FreeBSD Port and Packages
by Oliver Braun 20 Mar '02

20 Mar '02

Hi, I have built three FreeBSD nhc98 1.12 packages: Just the basic target: <URL:http://ist.unibw-muenchen.de/People/obraun/nhc98-1.12-basic-freebsd.tgz> Including the tracer: <URL:http://ist.unibw-muenchen.de/People/obraun/nhc98-1.12-with_tracer-freebsd.tgz> Including the tracer and the hat package for ghc: <URL:http://ist.unibw-muenchen.de/People/obraun/nhc98-1.12-with_tracer_ghc-freebsd.tgz> [The package including hat for ghc requires ghc 5.02.2 with packages going into ${PREFIX}/lib/ghc-5.02.2/imports/. The current ghc port in the FreeBSD ports tree fulfils this requirement.] Furthermore I have updated the port skeleton: <URL:http://ist.unibw-muenchen.de/People/obraun/nhc98.tgz> The update of the port has been already submitted to the FreeBSD project and is waiting for a committer to do his job. Regards, Olli -- Department of Computing Science Federal Armed Forces University Munich http://ist.unibw-muenchen.de/People/obraun/

1 0

Hat + GHC + -package util
by Jyrinx 18 Mar '02

18 Mar '02

My program uses the GetOpt module from the util package in ghc (thus I can't do this with nhc98). It builds just dandy (with ghc) with "hmake Dicedist -package util", but if I try to compile for Hat: --- snip --- [jyrinx@kryptonitespoon dicedist]$ hmake -T -hat -package util -package hat Dicedist # or any of several variations I've tried Fail: Can't find module GetOpt in . Or in standard libraries at /usr/lib/ghc-5.02.2/imports/std /usr/lib/ghc-5.02.2/imports/lang /usr/lib/ghc-5.02.2/imports/concurrent /usr/lib/ghc-5.02.2/imports/data /usr/lib/ghc-5.02.2/imports/net /usr/lib/ghc-5.02.2/imports/posix /usr/lib/ghc-5.02.2/imports/text /usr/lib/ghc-5.02.2/imports/util /usr/lib/ghc-5.02.2/imports/hssource /usr/lib/ghc-5.02.2/imports/greencard /usr/lib/ghc-5.02.2/imports/xlib /usr/lib/ghc-5.02.2/imports/HGL /usr/lib/ghc-5.02.2/imports/hat Asked for by: Dicedist.hs [Check settings of -I or -P flags?] Stop - hmake dependency error. --- snip --- This is a fresh build of nhc98; I haven't reconfigured anything except that the default compiler is ghc. What should I try next? Thanks for any suggestions! Jyrinx jyrinx_list(a)mindspring.com

2 1

ANNOUNCE: Hat 1.12
by Malcolm Wallace 15 Mar '02

15 Mar '02

------------------------------------ hat-1.12, nhc98-1.12, and hmake-3.02 ------------------------------------ We are pleased to announce a new release of Hat, the Haskell tracing (an debugging) system, together with supporting releases of the nhc98 compiler and the hmake compilation manager. This release of Hat is a major release. It incorporates new trace-browsing tools, and for the first time has support to compile programs for tracing with GHC in addition to nhc98. for information on hat: http://www.cs.york.ac.uk/fp/hat/ for information on nhc98: http://www.cs.york.ac.uk/fp/nhc98/ for information on hmake: http://www.cs.york.ac.uk/fp/hmake/ for downloads: http://www.cs.york.ac.uk/fp/nhc98/download.html (Hat and hmake are packaged together with nhc98 in a single download.) If you haven't already tried out the Hat tracing system, now is a good time to have a go! New features worth noting are: * There is a new tutorial introduction to Hat, showing how to generate program traces, how to explore them, and how they can help you to debug Haskell programs. * All the interactive trace browsing tools are implemented in Haskell, including a new, simpler, textual version of hat-trail. They all inter-operate, and use a similar command syntax. * The trace-generating machinery can now be used with GHC in addition to nhc98: just use `hmake -ghc -hat' instead of `hmake -nhc98 -T'. (However, for the moment, you still need to download and install the nhc98 distribution, even when you intend to trace programs only with GHC.) In addition there have also been many minor bugfixes to nhc98 and hmake. Bug reports should be sent to nhc-bugs(a)haskell.org. Discussion of the Hat system belongs on nhc-users(a)haskell.org. Regards, The Hat team at York

1 0

ANNOUNCE: hmake-3.00 RPM packages
by José Romildo Malaquias 22 Jan '02

22 Jan '02

I have built RPM packages for hmake-3.00, which are availabe at http://uber.com.br/romildo/ The packages were built in a RedHat Linux 7.2 system. It would be nice if these packages could be copied to the hmake site. Romildo On Mon, Jan 21, 2002 at 11:57:04AM +0000, Malcolm Wallace wrote: > hmake-3.00 > ---------- > We are pleased to announce the release of version 3.00 of 'hmake', > the Haskell program compilation manager. > > http://www.cs.york.ac.uk/fp/hmake/ > > Features of hmake: > * compiler independent > * aware of .hi files in re-compilation analysis > * respects cpp directives > * supplies an optional Hugs-like interactive environment (hi) > > New features in 3.00: > * improved detection and configuration of compilers > * multiple compilers of the same type are now permitted simultaneously > (e.g. ghc 4.08 + 5.02) > * you can refer to compilers by simple name or absolute paths > * a new separate tool 'hmake-config' manages hmakerc files > * various Haskell preprocessors are now recognised and invoked > (e.g. happy, hsc2hs, c2hs, greencard) if the corresponding file > extension is found (.ly/.y, .hsc, .chs, .gc) > * hooks for the forthcoming compiler-independent Haskell tracing > system ('portable' Hat) are included > > Bug reports: > Please send bug reports for 'hmake' to the mailing list > nhc-bugs(a)haskell.org -- Prof. José Romildo Malaquias Departamento de Computação http://iceb.ufop.br/~romildo Universidade Federal de Ouro Preto romildo(a)iceb.ufop.br Brasil romildo(a)uber.com.br

2 1

nhc98 1.10 FreeBSD Port and Packages
by Oliver Braun 03 Jan '02

03 Jan '02

Hello *, I have build two FreeBSD 4.4-Stable nhc98 1.10 packages: Build with the basic target: <URL:http://ist.unibw-muenchen.de/People/obraun/nhc98-1.10-basic-freebsd.tgz> Build including the tracer: <URL:http://ist.unibw-muenchen.de/People/obraun/nhc98-1.10-with_tracer-freebsd.tgz> I have also submitted the FreeBSD port for inclusion in the FreeBSD ports tree, but it hasn't been committed yet. Regards, Olli -- Dipl.-Inform. (Univ.) Oliver Braun Department of Computing Science Federal Armed Forces University Munich http://ist.unibw-muenchen.de/People/obraun/

1 1