Re: [Haskell-cafe] createProcess running non-existent programs

Quoth Alexander Kjeldaas , > See access(2) ... a classic "code smell" in UNIX programming, for the same reasons. We can solve this problem in an efficient way that works well, and equally well, on any POSIX platform that supports F_CLOEXEC on pipes, and I can't think of anything that doesn't. T

Re: [Haskell-cafe] For consistency; it would be better if the import statement matched the cabal install statement or :m form.

On Tue, Aug 14, 2012 at 11:04 PM, KC wrote: > :m +Data.Array.Repa.Algorithms.Randomish > > cabal install repa.algrothms > > would be more consistent. > What do you do when multiple modules use the same namespace? (monads-{fd,tf} and the regex modules being cases in point) -- brandon s allbery

[Haskell-cafe] For consistency; it would be better if the import statement matched the cabal install statement or :m form.

:m +Data.Array.Repa.Algorithms.Randomish cabal install repa.algrothms would be more consistent. -- -- Regards, KC ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: [Haskell-cafe] Debian 6.0.5: 'cabal install curl' problem

On Tue, Aug 14, 2012 at 10:23 AM, dokondr wrote: > Anyway, then I did: > -> apt-get install curl > -> cabal install curl > Cabal fails to install 'curl' because it can not find curl library. Please > see detailed cabal output at the end of this message. > Just as a general thing, almost all Linu

Re: [Haskell-cafe] I use "cabal install repa" but then WinGHCi says module Data.Array.Rep.Algorithms.Ramdomish not found.

On 14/08/2012 7:17 AM, "KC" wrote: > > The install of repa-algorithms fails saying it can't cannot find an llvm. > > > In any case why can't the install syntax be > "cabal install repa.algorithms" > then it would be more consistent with the import statement. Because the name of the package is rep

Re: [Haskell-cafe] createProcess running non-existent programs

On 14 August 2012 17:22, Niklas Larsson wrote: > 2012/8/14 Alexander Kjeldaas : > > > > > > On 13 August 2012 23:49, Richard O'Keefe wrote: > >> > >> > >> On 13/08/2012, at 11:26 PM, Alexander Kjeldaas wrote: > >> > >> > > >> > This isn't that hard - a pipe shouldn't be needed anymore. Just > r

Re: [Haskell-cafe] Debian 6.0.5: 'cabal install curl' problem

Marcot, Thanks for the detailed info! Looks like "aptitude install libcurl4-gnutls-dev" solved the problem. cheers, Dmitri On Tue, Aug 14, 2012 at 6:29 PM, Marco Túlio Pimenta Gontijo < marcotmar...@gmail.com> wrote: > Hi dokondr. > > On Tue, Aug 14, 2012 at 11:23 AM, dokondr wrote: > (...) > >

Re: [Haskell-cafe] createProcess running non-existent programs

2012/8/14 Alexander Kjeldaas : > > > On 13 August 2012 23:49, Richard O'Keefe wrote: >> >> >> On 13/08/2012, at 11:26 PM, Alexander Kjeldaas wrote: >> >> > >> > This isn't that hard - a pipe shouldn't be needed anymore. Just require >> > a post-2003 glibc. >> > >> > fexecve is a system call in mo

Re: [Haskell-cafe] Fixity declaration extension

On 14/08/12 13:46, Ketil Malde wrote: AntC writes: I agree. I don't declare operators very often, and when I do I always struggle to remember which way round the precedence numbers go. [...] (Anything else we can bikeshed about while we're at it?) infixl * before + Perhaps "before"

Re: [Haskell-cafe] Debian 6.0.5: 'cabal install curl' problem

Hi dokondr. On Tue, Aug 14, 2012 at 11:23 AM, dokondr wrote: (...) > Cabal fails to install 'curl' because it can not find curl library. Please > see detailed cabal output at the end of this message. Cabal means the curl C library, which must be installed by either the packages libcurl4-openssl-

[Haskell-cafe] Debian 6.0.5: 'cabal install curl' problem

Please help to solve a problem installing curl package ( http://hackage.haskell.org/package/curl/) on Debian 6.0.5. I am running the most recent Debian Haskell platform with GHC 6.12.1. I did: -> cabal update -> cabal install cabal-install It is interesting that in case you do again 'cabal update"

[Haskell-cafe] Lost global Contents of haddock

Hi. I just noticed that my global Contents of the haddock documentation of modules ( file:///home/marcot/.cabal/share/doc/index.html ) lost most of the modules. My workflow is fairly straightforward, but I do some --reinstall --force-reinstalls with cabal install. For instance, the link for Prel

Re: [Haskell-cafe] Fixity declaration extension

AntC writes: > I agree. I don't declare operators very often, and when I do I always > struggle > to remember which way round the precedence numbers go. [...] > (Anything else we can bikeshed about while we're at it?) infixl * before + Perhaps "before" and "after" clearer than "higher" a

Re: [Haskell-cafe] Data structure containing elements which are instances of the same type class

On Mon, Aug 13, 2012 at 6:53 PM, Alexander Solla wrote: > In a classical logic, the duality is expressed by !E! = A, and !A! = E, > where E and A are backwards/upsidedown and ! represents negation. In > particular, for a proposition P, > > Ex Px <=> !Ax! Px (not all x's are not P) > and > Ax Px <

Re: [Haskell-cafe] Fixity declaration extension

On 08/14/2012 02:52 PM, Ryan Ingram wrote: On Tue, Aug 14, 2012 at 1:04 AM, Евгений Пермяков > wrote: Your idea looks _much_ better from code clarity point of view, but it's unclear to me, how to deal with it internally and in error messages. I'm not a

Re: [Haskell-cafe] Fixity declaration extension

On Tue, Aug 14, 2012 at 1:04 AM, Евгений Пермяков wrote: > Your idea looks _much_ better from code clarity point of view, but it's > unclear to me, how to deal with it internally and in error messages. I'm > not a compiler guy, though. > How to deal with it internally: It's pretty easy, actually

Re: [Haskell-cafe] createProcess running non-existent programs

On 13 August 2012 23:49, Richard O'Keefe wrote: > > On 13/08/2012, at 11:26 PM, Alexander Kjeldaas wrote: > > > > > This isn't that hard - a pipe shouldn't be needed anymore. Just require > a post-2003 glibc. > > > > fexecve is a system call in most BSDs. It is also implemented in glibc > using

[Haskell-cafe] overloading integer literals

During development some toy base library I found impossible to use Numeric literals. Quick search showed, that one need both fromInteger in scope (reasonable) and, as I understand, access to Integer type from 'base' package ('base' for clarity later). It is perfectly reasonable if we assume tha

Re: [Haskell-cafe] Fixity declaration extension

Your idea looks _much_ better from code clarity point of view, but it's unclear to me, how to deal with it internally and in error messages. I'm not a compiler guy, though. Worse, it does not allow to set up fixity relative to operator that is not in scope and it will create unnecessary interm

Re: [Haskell-cafe] Data structure containing elements which are instances of the

> It's only a test case. The real thing is for a game and will be > something like: > class EntityT e where >update :: e -> e >render :: e -> IO () >handleEvent :: e -> Event -> e >getBound:: e -> Maybe Bound > data Entity = forall e. (EntityT e) => Entity e > data