Hi,
Why not just call it, say, Test.QuickCheck2?
I think module names should reflect only their functionality. I don't
see how External or Contrib or Chalmers would say anything
useful about the functionality of the modules.
A while ago I sent a proposal for package mounting, which I think
Hi,
This is quite a minor issue but I just wanted to point out that it
would be a little easier on the eye to use double quotes rather than
paired single quotes in error messages e.g.:
Couldn't match the rigid variable `d'' against `Bar a'
`d'' is bound by the polymorphic type `forall
Hi Ralf,
Thanks. I'm sorry, now I think that wasn't the source of my problem.
What I want to do is specialise not to a specific type like Bool but
to the class of all pairs (a,b). But this causes the compiler to
complain, even for simpler examples:
cast True :: (Typeable a, Typeable b) = Maybe
Hi Ralf,
I'm looking for a function like extT but with more general type:
(t a - s a) - (t b - s b) - (t a - s a)
Is there such a thing in the generics library?
Thanks,
Frederik
--
http://ofb.net/~frederik/
___
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Hi Alberto,
I'm sorry if this has been discussed before...
I'm reading your paper, at one point it says (re. the PCA example):
Octave achieves the same result, slightly faster. (In this experiment
we have not used optimized BLAS libraries which can improve efficiency
of the GSL)
That seems to
March 2006 23:01, Frederik Eaton wrote:
I'm trying to figure out how to use STUArray. Is it possible to let
it be polymorphic?
Hi Frederik
I think this thread (and the one it referres to) provide a solution:
http://www.mail-archive.com/haskell%40haskell.org/msg17081.html
Ben
Hi all,
I'm trying to figure out how to use STUArray. Is it possible to let it
be polymorphic?
Here is an excerpt from my program:
class (IArray UArray k, Ord k, Fractional k) = Elt k
class (Bounded a, Enum a, Ix a, Eq a, Show a) = IxB a
-- |like Array but uses IxB instead of Ix
Hi all,
What is the status of Rob Ennals' optimistic evaluation work? I'm told
that it has been removed from GHC. This is extremely depressing to me.
Without such a feature available, it becomes very difficult to write
programs that process large amounts of data in Haskell. In many such
an Integer value for the constructors.
Ralf
-Original Message-
From: [EMAIL PROTECTED]
[mailto:glasgow-haskell-
[EMAIL PROTECTED] On Behalf Of Frederik Eaton
Sent: Thursday, December 29, 2005 10:57 AM
To: glasgow-haskell-bugs@haskell.org
Subject: Constr and Eq
toConstr
These don't seem to have Data instances in 6.4.1:
Language.Haskell.TH.Exp
Data.Tree.Tree
I guess there are probably a lot more, I just ran into these today. Is
there anything which prevents proper 'deriving' clauses from being
added to their definitions?
Frederik
$ ghc --make Vector.hs -fth
Chasing modules from: Vector.hs
[1 of 2] Skipping Fu.Prepose ( Fu/Prepose.hs, Fu/Prepose.o )
[2 of 2] Compiling Fu.Vector( Vector.hs, Vector.o )
ghc-6.5.20051208: panic! (the `impossible' happened, GHC version 6.5.20051208):
Failed binder lookup:
By the way, the variable b which b{tv a1hL} seems to be referring
to is on the last line of vecQ. Help is much appreciated!
Thanks,
Frederik
On Fri, Dec 16, 2005 at 09:54:28PM +, Frederik Eaton wrote:
$ ghc --make Vector.hs -fth
Chasing modules from: Vector.hs
[1 of 2] Skipping
feature as
well.
Frederik
On Mon, Dec 12, 2005 at 02:28:34PM -, Simon Marlow wrote:
On 10 December 2005 05:08, Frederik Eaton wrote:
$ ghc -pgmc gcc --make Matrix.hs -o matrix
Chasing modules from: Matrix.hs
[1 of 2] Compiling Fu.Prepose ( Fu/Prepose.hs, Fu/Prepose.o )
ghc
That made it work, thanks.
Frederik
On Mon, Dec 12, 2005 at 07:01:42PM -, Simon Marlow wrote:
On 12 December 2005 18:49, Frederik Eaton wrote:
$ ghc -pgml gcc -pgmP gcc -E -undef -traditional -pgmc gcc --make
Matrix.hs -o matrix Chasing modules from: Matrix.hs
[1 of 2] Compiling
working. I'll change it back to gcc. To workaround it
you can add '-pgmc gcc' to the command line.
Cheers,
Simon
On 09 December 2005 03:26, Frederik Eaton wrote:
Does this depend on a certain version of gcc?
$ ghc -M --make Matrix.hs -o matrix
Chasing modules from: Matrix.hs
On 09 December 2005 03:26, Frederik Eaton wrote:
Does this depend on a certain version of gcc?
$ ghc -M --make Matrix.hs -o matrix
Chasing modules from: Matrix.hs
[1 of 2] Compiling Fu.Prepose ( Fu/Prepose.hs, Fu/Prepose.o )
ghc-6.5.20051207: could not execute: gcc-3.4.3
Hi,
I've just looked through this discussion, since I'm working on my own
library, I wanted to see what people are doing.
It's something like this, using the Prepose (Implicit Configurations)
paper:
data L n = L Int deriving (Show, Eq, Ord)
-- singleton domain
type S = L Zero
class (Bounded
Shouldn't it work to pass -M --make? Or, hmm, maybe -M isn't
generating enough dependencies - like, it seems that it should
generate a dependency for the final output file specified with -o
but it isn't...
Frederik
On Wed, Dec 07, 2005 at 11:34:55AM -, Simon Marlow wrote:
On 04 December
: [EMAIL PROTECTED]
[mailto:glasgow-haskell-users-
| [EMAIL PROTECTED] On Behalf Of Frederik Eaton
| Sent: 04 December 2005 00:46
| To: glasgow-haskell-users@haskell.org
| Subject: recommended build system
|
| Hi all,
|
| I'm looking for a build system for my projects which will correctly
Go figure...
I suppose that fixes Cabal too, now.
Thanks,
Frederik
On Mon, Dec 05, 2005 at 10:51:19AM -, Simon Peyton-Jones wrote:
Simon fixed this recently. The GHC HEAD build will not re-link with
--make if none of the object files have changed.
Simon
Hi all,
I'm looking for a build system for my projects which will correctly
handle all of ghc's dependencies. I.e. every time I ask it to rebuild
an output file, it will only do the minimum amount of compilation
necessary. This is important to me because ghc --make and cabal
currently (AFAICT)
Is true that it is currently necessary to reinstall every
locally-installed package when I upgrade to a new version of ghc, even
if it is only a new patchlevel?
Maybe this should only be necessary when the major or minor version
number changes?
Frederik
On Wed, Oct 19, 2005 at 08:20:10PM +0200, Georg Martius wrote:
Hi folks,
I was really annoyed by the fact that for Data.Map and Data.Set are no Read
instances declared, but Show instances are! I believe there should be some
kind of unwritten rule that in the standart lib the Show and Read
be garbage
collected is a bit tricky (it can be done though; see our old Memo table
implementation in fptools/hslibs/util/Memo.hs).
Cheers,
Simon
On 16 October 2005 20:53, Frederik Eaton wrote:
John Meacham suggested that I should be a little more clear about the
semantics I'm
Hi,
I'm trying to get MonadReader-like functionality in the IO monad. It
doesn't appear possible implement it with the interfaces that
Haskell98 or GHC provide. I'm looking for something like thread-local
variables. The interface could be something like this:
newTLRef :: a - IO (TLRef a)
-0700, Frederik Eaton wrote:
Hi,
I'm trying to get MonadReader-like functionality in the IO monad. It
doesn't appear possible implement it with the interfaces that
Haskell98 or GHC provide. I'm looking for something like thread-local
variables. The interface could be something like
I've previously mentioned that I would like to see an 'instance
Bounded Double' etc., as part of the standard, which would use 1/0 for
maxBound, or the largest possible value (there must be one!) for
platforms where that is not possible. I don't see a problem with
looking at Double values as if
On Mon, Sep 19, 2005 at 02:22:10PM +0100, Glynn Clements wrote:
Frederik Eaton wrote:
In addition to the stack trace problems, I found: (1) a problem where
output freezes when it is being piped through 'tee' and the user
presses ^S and then ^Q
That's the terminal driver; use stty
Hi Ralf,
I'm revisiting this project and just have another question. The story
seems to be that GHC cannot derive Typeable1, or Typeable when
Typeable1 is available - so anyone who wants to use ext1Q must define
special instances for all of the datatypes they use, is this correct?
Will this
It could be a bug - can you reduce the example and report it?
GHC's profiler tries to overlay a lexical call graph on to the dynamic
execution of the program. It does this more or less in the way you
described before: every function gets an extra argument describing the
call context.
Hi,
It seems like ghc 6.4 is using modules from installed packages in
preference to modules in the current source directory when I compile
something with --make. I can fix it with -hide-package PACKAGE;
but shouldn't the default behavior be to look in the source directory
first? Otherwise it
I have another proposal, though. Introduce a new keyword, which I'll
call borrow (the opposite of return), that behaves like a
function of type (Monad m) = m a - a inside of do statements. More
precisely, a do expression of the form
do { ... ; ... borrow E ... ; ... }
is transformed
On Wed, Sep 14, 2005 at 02:44:11PM +0100, Simon Marlow wrote:
On 10 September 2005 21:15, Frederik Eaton wrote:
On Fri, Sep 02, 2005 at 04:40:05PM +0400, Bulat Ziganshin wrote:
Hello Nils,
Friday, September 02, 2005, 10:47:05 AM, you wrote:
Compile your program with -prof
On Tue, Sep 13, 2005 at 10:15:39AM +0100, Simon Marlow wrote:
On 12 September 2005 16:34, Frederik Eaton wrote:
On Mon, Sep 12, 2005 at 12:41:32PM +0100, Simon Marlow wrote:
On 20 August 2005 22:38, Frederik Eaton wrote:
Hi,
It seems like it would be nice to have runghc not take
On Mon, Sep 12, 2005 at 12:46:22PM +0100, Simon Marlow wrote:
On 20 August 2005 22:41, Frederik Eaton wrote:
Here is my program:
#!/usr/bin/runghc -i./foo
main :: IO ()
main = do
print hi
$ runghc --version
The Glorious Glasgow Haskell Compilation System, version 6.4
On Mon, Sep 12, 2005 at 12:41:32PM +0100, Simon Marlow wrote:
On 20 August 2005 22:38, Frederik Eaton wrote:
Hi,
It seems like it would be nice to have runghc not take modules from
the current working directory in many cases since it breaks
abstraction. It looks like it may be only
.
(by the way, it would be nice if --version and --help were functional
in the newer versions of runghc)
Thanks,
Frederik Eaton
--
http://ofb.net/~frederik/
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that the importance of notation is underrated). I think
most such shorthand can be understood simply in terms of lifting, and
I hypothesize that we can find an automatic lifting rule along the
lines I've described which will not be as ambiguous as you suggest.
Frederik
On 09/09/05, Frederik Eaton [EMAIL PROTECTED
On Sat, Sep 10, 2005 at 12:55:15AM +0100, Claus Reinke wrote:
life is funny, isn't it? so many people so eagerly
lazily, in my case
discussing conversion between non-monadic and monadic code,
I'm trying to discuss a new syntax, not code transformations. I agree
that the two are related. I'm
On Thu, Sep 08, 2005 at 09:34:33AM +0100, Keean Schupke wrote:
Can't you do automatic lifting with a Runnable class:
class Runnable x y where
run :: x - y
instance Runnable (m a) (m a) where
run = id
instance Runnable (s - m a) (s - m a) where
run =
as in 'liftM', not 'lift'
from MonadTrans.
On Fri, Sep 09, 2005 at 01:17:57PM -0700, Frederik Eaton wrote:
On Thu, Sep 08, 2005 at 09:34:33AM +0100, Keean Schupke wrote:
Can't you do automatic lifting with a Runnable class:
class Runnable x y where
run :: x - y
instance Runnable
By the way, I thought it would be obvious, but a lot of people seem to
be missing the fact that I'm not (as Sean, I believe, isn't)
requesting limited support for 1 or 2 or 3 argument functions or
certain type classes to be applied to monads, or for certain
operations to defined on certain types.
It appears that the --global option to ghc-pkg causes the program to
forget all of the preceding package configuration options.
Here we get results for all three options:
$ /usr/bin/ghc-pkg list --global --user --package-conf=testp.conf
/usr/lib/ghc-6.4/package.conf:
...
(util-1.0),
Frederik,
To do automatic lifting you need to do a (higher-order) effect analysis,
then make sure the
compiler doesn't rearrange applications which have conflicting effects.
Hrm, I disagree. I don't think this is what I was advocating in my
message.
What I'm advocating is a reasonably
On Thu, Sep 08, 2005 at 08:39:29AM +0200, Tomasz Zielonka wrote:
On Wed, Sep 07, 2005 at 12:46:42PM -0700, Frederik Eaton wrote:
Hi all,
Hi!
After some weeks of squinting, I've ended up settling with the
following partial solution in my configuration files (I use Mutt):
set
dependency, then compile the resulting code.
which sounds sort of the same as the semantics I'm envisioning.
Frederik
On Wed, Sep 07, 2005 at 11:41:41PM -0700, Frederik Eaton wrote:
Frederik,
To do automatic lifting you need to do a (higher-order) effect analysis,
then make sure the
compiler
On Thu, Sep 08, 2005 at 10:35:49AM +0200, Wolfgang Lux wrote:
Frederik Eaton wrote:
I want the type system to be able to do automatic lifting of monads,
i.e., since [] is a monad, I should be able to write the following:
and have it interpreted as do {a-[1,2]; b-[3,4]; return (a+b
On Thu, Sep 08, 2005 at 09:30:34AM -0700, Scherrer, Chad wrote:
One of Mark Jones's articles suggests something like
class Plus a b c | a b - c where
(+) :: a - b - c
Would
instance (Plus a b c, Monad m) = Plus (m a) (m b) (m c) where
mx + my = do x - mx
y - my
In an invocation of ghc-pkg describe PACKAGE, if a package PACKAGE
is found in multiple package.conf files (which are specified via the
--package-conf option on the ghc-pkg command line) then a description
for *each* such occurrence of that package is printed, one after the
other.
But since
Hi all,
I've been trying for some time to get threading to work properly on
this mailing list. The problem is that I don't want to thread by
subject in all of my folders, because then messages with short
subjects like hi, hey, etc., in my personal folders will end up
together. However, threading
Hi,
Sean's comment (yeah, it was like a billion years ago, just catching
up) is something that I've often thought myself.
I want the type system to be able to do automatic lifting of monads,
i.e., since [] is a monad, I should be able to write the following:
[1,2]+[3,4]
and have it
On Mon, Sep 05, 2005 at 11:48:12AM -0400, Stefan Monnier wrote:
Sorry if I've asked this before, but is version 2.0 of haskell-mode on
your website really the newest version?
It's the latest released version. There's newer code in the CVS, of course.
I ask because the file
On Mon, Sep 05, 2005 at 06:53:21PM -0400, Stefan Monnier wrote:
Hmm. I use font-lock, but I use xemacs (21.4). Maybe that's the cause
of the difference.
IIRC XEmacs's support for syntax-table text-properties (and more
specifically for font-lock-syntactic-keywords) has been generally fairly
Just more or less as an aside, at its origin in April (!) this thread
didn't mention any debugger - the question was just how to build ghc
so that a stack trace would come out. A real debugger is no replacement
for that (because you have to be on hand and know how to repeat the problem
to
On Thu, Sep 01, 2005 at 04:46:38PM +0100, Malcolm Wallace wrote:
Frederik Eaton [EMAIL PROTECTED] writes:
Is there a way to use Hat with GHC, without 'hmake'?
You could transform each module in your project individually with
hat-trans, before running ghc --make over the traced version
On Wed, Apr 27, 2005 at 05:15:30PM +1000, Bernard Pope wrote:
On Wed, 2005-04-27 at 07:45 +0200, Ketil Malde wrote:
[I want to know] who called who all the way from main to head,
because the key function is going to be one somewhere in the middle.
Perhaps. I am told stack backtraces
. Perhaps you
could look into the TH code for SYB3 (ICFP 2005) to see whether this can
be automated. This sort of discussion calls for kind polymorphism once
again.
-Original Message-
From: [EMAIL PROTECTED] [mailto:haskell-cafe-
[EMAIL PROTECTED] On Behalf Of Frederik Eaton
Sent
Hi all,
I'm trying to write something like a generic fmap, or a generic
natural transformation. The application is this. I have a typed
logical variable library which produces arbitrary terms with values of
type Var a, which are references to a value of type Maybe a, and I
want to write a solve
Hi all,
If you execute the following commands:
$ wget http://ofb.net/~frederik/futility/futility-0.1.0.tar.gz
$ tar -xvzf futility-0.1.0.tar.gz
$ cd futility-0.1.0/
$ ./do-build conf=1
Then if all goes well you should see an error like this:
./Fu/MonadComp.hs:46:0:
Duplicate
Hi,
It seems like it would be nice to have runghc not take modules from
the current working directory in many cases since it breaks
abstraction. It looks like it may be only a real problem for
debugging, when modules are supposed to be in a package somewhere, but
aren't, and the current directory
Here is my program:
#!/usr/bin/runghc -i./foo
main :: IO ()
main = do
print hi
$ runghc --version
The Glorious Glasgow Haskell Compilation System, version 6.4
$ ls foo
$ ./test.hs
interactive:1:85:
Failed to load interface for `Main':
Could not find module `Main':
Hi,
Has runghc been fixed to not require scripts to have a .hs suffix?
It looks to me like it hasn't, in the recent 6.4.1 snapshot, but I may
be overlooking some option.
Frederik
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Compiling a module which imports the 14 smaller modules takes much
less time than compiling the monolithic module - it's almost 5 times
faster (see below).
We've found the cause of this, and committed a fix. The full
HTMLMonda98.hs now compiles in 27 seconds for me, without optimisation
# ghc --version
The Glorious Glasgow Haskell Compilation System, version 6.4
# uname -a
Linux fly 2.4.25-powerpc #1 mer avr 14 15:38:38 CEST 2004 ppc
GNU/Linux
Strange.. as far as I can tell, -split-objs is supposed to be supported
on powerpc-*-linux. Can any powerpc-*-linux
Hi,
I'm trying to compile (a modified version of) HSQL and the compilation
fails on the first ghc invocation:
...
rm -f build/libHSsql.a
cp src/HSQL/Types.hs build/Database/HSQL/Types.hs
mkdir -p build/Database/HSQL/Types_split
rm -f build/Database/HSQL/Types_split/*
/usr/bin/ghc
On Thu, Aug 04, 2005 at 12:27:45PM +0100, Simon Marlow wrote:
On 04 August 2005 10:47, Frederik Eaton wrote:
I'm trying to compile (a modified version of) HSQL and the compilation
fails on the first ghc invocation:
...
rm -f build/libHSsql.a
cp src/HSQL/Types.hs build/Database/HSQL
If you don't like that way, you can use {;} as you say.
-- Lennart
Frederik Eaton wrote:
Huh, that seems patronizing. Well at least I can override it with {}.
Thanks,
Frederik
On Thu, Jul 14, 2005 at 02:42:53AM +0200, Lennart Augustsson wrote:
That's how it is defined
Compiling the following module (with ghc) fails with error message
parse error (possibly incorrect indentation), pointing to the let
statement. The error goes away when I indent the lines marked --*.
But I don't understand how what I've written could be ambiguous. If I
am inside a parenthesized
it) is there to give visual cues. If you were allowed to override
these easily just because it's parsable in principle then your code
would no longer have these visual cues that make Haskell code fairly
easy to read.
-- Lennart
Frederik Eaton wrote:
Compiling the following module (with ghc
Hi Isaac,
Is there a way to specify a particular package.conf for use when
installing and registering packages with Cabal? I'm trying to
Cabal-ize WASH which has a number of packages which depend on each
other. The problem is that in order to build the next package, the
previous one has to be
Hi,
How do I install a package in the user package.conf with cabal? It is
not clear to me how to do this, looking at the output of 'configure
--help'. There is an option --user to get dependencies from the user
cabal file but this still, somewhat counterintuitively, tries to
install the package
Thanks for the quick reply!
How do I install a package in the user package.conf with cabal? It is
not clear to me how to do this, looking at the output of 'configure
--help'. There is an option --user to get dependencies from the user
cabal file but this still, somewhat
I forgot to say, when I run configure like
runghc Setup.hs configure --with-hc-pkg=ghc-pkg --user --prefix=$HOME
and then run 'install', it exits with code 127 but displays no error
message. Maybe something to look into...
Frederik
On Sun, Jul 10, 2005 at 05:00:13PM -0700, Frederik Eaton wrote
When I compile WASH it takes forever for ghc to finish compiling
HTMLMonad98, and on my powerpc system with 151MB free RAM, gcc crashes
during the compile. Should some of the larger WASH modules maybe be
split into multiple files? I get the sense that ghc compilation
time/memory is
On Mon, Jun 27, 2005 at 01:08:07PM +0100, Simon Marlow wrote:
On 25 June 2005 21:09, Frederik Eaton wrote:
Skipping Version ( ./Version.hs,
dist/build/./fcq-www.cgi-tmp/Version.o ) Skipping ChangeLog(
./ChangeLog.hs, dist/build/./fcq-www.cgi-tmp/ChangeLog.o ) Compiling
On Sun, Jun 26, 2005 at 10:18:03AM +0200, Lemmih wrote:
On 6/26/05, Frederik Eaton [EMAIL PROTECTED] wrote:
This is kind of annoying:
$ ghc-pkg --version
GHC package manager version 6.4
$ ghc-pkg unregister WASHHTML
ghc-pkg: package WASHHTML matches multiple packages: WASHHTML
$ ghc-pkg describe WASHHTML\*
ghc-pkg: cannot parse 'WASHHTML*' as a package identifier
By the way, if I write it as 'WASHHTML-\*' it lists both packages as
per documentation. And I can use that to remove both, and then
reinstall one. Still, my goal was to remove only one.
Frederik
--
Skipping Version ( ./Version.hs,
dist/build/./fcq-www.cgi-tmp/Version.o )
Skipping ChangeLog( ./ChangeLog.hs,
dist/build/./fcq-www.cgi-tmp/ChangeLog.o )
Compiling Main ( fcq-www.hs, dist/build/./fcq-www.cgi-tmp/Main.o )
This is kind of annoying:
$ ghc-pkg --version
GHC package manager version 6.4
$ ghc-pkg unregister WASHHTML
ghc-pkg: package WASHHTML matches multiple packages: WASHHTML, WASHHTML-0.14.8
$ ghc-pkg describe WASHHTML
ghc-pkg: package WASHHTML matches multiple packages: WASHHTML, WASHHTML-0.14.8
$
(By the way, sorry about cross-posting again. People have already
replied to just 'haskell@' and just 'libraries@' but I'll try to stick
to 'libraries@' after this since it seems that some users' mail
clients show them two copies otherwise)
This idea has been raised before, but it was a while
Hi all,
It looks like there's been a bit of recent discussion regarding module
and package namespaces. There is a certain possible design feature
that I don't think has been mentioned yet, that I think would be very
helpful, so I thought I should at least bring it up.
What I want is to be able
-
| [EMAIL PROTECTED] On Behalf Of Frederik Eaton
| Sent: 21 May 2005 14:34
| To: glasgow-haskell-bugs@haskell.org
| Subject: ghci obscurity
|
| Often ghci will give me the following message instead of something
| helpful:
|
| Top level:
| No instance for (Show (IO
PROTECTED] On Behalf Of Frederik Eaton
| Sent: 21 May 2005 11:49
| To: glasgow-haskell-bugs@haskell.org
| Subject: the impossible happened
|
| ghc-6.4: panic! (the `impossible' happened, GHC version 6.4):
| Maybe.fromJust: Nothing
|
| Please report it as a compiler bug to
glasgow
ghc-6.4: panic! (the `impossible' happened, GHC version 6.4):
Maybe.fromJust: Nothing
Please report it as a compiler bug to glasgow-haskell-bugs@haskell.org,
or http://sourceforge.net/projects/ghc/.
I think this was the command line:
/home/frederik/arch/i386/bin/ghc -odir
Often ghci will give me the following message instead of something
helpful:
Top level:
No instance for (Show (IO ()))
arising from use of `print' at Top level
Probable fix: add an instance declaration for (Show (IO ()))
In a 'do' expression: print it
I don't know how hard it
implemented something similar to gcc's -x flag.
Cheers,
Simon
On 14 May 2005 20:04, Frederik Eaton wrote:
(moving to a separate thread)
Also, how hard would it be to make it so that runghc doesn't require
script file names to end with .hs? Some people like to keep their
executable
Hi,
When I run the following line in ghci:
Prelude System.Process Control.Concurrent System.IO do { (inp, out, err, ph)
- runInteractiveProcess cat [] Nothing Nothing; forkIO (do hPutStr inp
this\nis\na\ntest\n; hClose inp); waitForProcess ph }
... it doesn't terminate. I'm following the
implemented something similar to gcc's -x flag.
Cheers,
Simon
On 14 May 2005 20:04, Frederik Eaton wrote:
(moving to a separate thread)
Also, how hard would it be to make it so that runghc doesn't require
script file names to end with .hs? Some people like to keep their
executable
Hi,
When I run the following line in ghci:
Prelude System.Process Control.Concurrent System.IO do { (inp, out, err, ph)
- runInteractiveProcess cat [] Nothing Nothing; forkIO (do hPutStr inp
this\nis\na\ntest\n; hClose inp); waitForProcess ph }
... it doesn't terminate. I'm following the
implemented something similar to gcc's -x flag.
Cheers,
Simon
On 14 May 2005 20:04, Frederik Eaton wrote:
(moving to a separate thread)
Also, how hard would it be to make it so that runghc doesn't require
script file names to end with .hs? Some people like to keep their
executable
/home/frederik/arch/i386/bin/ghc -odir dist/build/../pp-web.cgi-tmp -hidir
dist/build/../pp-web.cgi-tmp -o dist/build/../pp-web.cgi --make -i.. -O3
-fignore-asserts -fglasgow-exts -package base-1.0 -package WASH-CGI
../maint/webpage.hs -v
Glasgow Haskell Compiler, Version 6.4, for Haskell 98,
It looks like CTime (Foreign.C.Types) used to be an Integral but isn't
anymore, why? Isn't it just an integer?
Frederik
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, Frederik Eaton wrote:
It looks like runghc is exiting with status 0 if there is a problem.
Shouldn't this be non-zero?
$ runghc -V
The Glorious Glasgow Haskell Compilation System, version 6.4
$ runghc /dev/null; echo $?
Could not find module `/dev/null':
use -v to see a list
It looks like runghc is exiting with status 0 if there is a problem.
Shouldn't this be non-zero?
$ runghc -V
The Glorious Glasgow Haskell Compilation System, version 6.4
$ runghc /dev/null; echo $?
Could not find module `/dev/null':
use -v to see a list of the files searched for
Hi,
Hmm, have the new xlib bindings been tested? For instance, when I run
the following program:
module Main where
import Graphics.X11.Xlib
import Graphics.X11.Xlib.Display
main :: IO ()
main = do
display - openDisplay
the Status issue or have I
described the problem well enough?
Frederik
On Sat, May 07, 2005 at 01:05:12PM -0700, Frederik Eaton wrote:
Hi,
Hmm, have the new xlib bindings been tested? For instance, when I run
the following program
the Status issue or have I
described the problem well enough?
Frederik
On Sat, May 07, 2005 at 01:05:12PM -0700, Frederik Eaton wrote:
Hi,
Hmm, have the new xlib bindings been tested? For instance, when I run
the following program
Hi,
Hmm, have the new xlib bindings been tested? For instance, when I run
the following program:
module Main where
import Graphics.X11.Xlib
import Graphics.X11.Xlib.Display
main :: IO ()
main = do
display - openDisplay
On Wed, Mar 09, 2005 at 10:40:03PM -, Simon Marlow wrote:
On 09 March 2005 21:13, Frederik Eaton wrote:
I agree that the case you're presenting is indeed more difficult,
but I don't think you're doing the estimations right for the one at
hand. The cost and annoyance of perhaps tens
You need to swap the arguments to TCons...
data TCons l a = TCons !l a
Then:
instance Functor (TCons (TCons HNil a)) where
fmap f (TCons (TCons HNil x) y) = TCons (TCons HNil (f x)) y)
How does one solve this problem in general, i.e. when the arguments to
a type are in the wrong
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