Hello GHC people,
I'm having a lot of fun with GHC and wxHaskell, but at one point something
unwanted happened. I created a version of wxHaskell from source with extra
GHC options -prof -auto-all; I wanted to have a profiling version of
wxHaskell so I can get a stack trace when my program
Arjan van IJzendoorn wrote:
[...] Loading package wxcore ... linking ... WARNING: Overflown relocation field
(# re
locs found: 30765)
C:/cygwin/usr/local/lib/wxcore0.o: unknown symbol `_CC_LIST'
ghc.exe: panic! (the `impossible' happened, GHC version 6.2.1):
can't load package `wxcore'
Hello,
I'm having strange problems with binary file output. In my application I'm
preparing the [Word8], then doing just 4 operations:
1. openBinaryFile
2. newListArray from my list
3. hPutArray
4. file close
Everything works ok till I change one function deep in computational code.
The change
Bugs item #971327, was opened at 2004-06-11 18:02
Message generated for change (Tracker Item Submitted) made by Item Submitter
You can respond by visiting:
https://sourceforge.net/tracker/?func=detailatid=108032aid=971327group_id=8032
Category: None
Group: 6.0
Status: Open
Resolution: None
Bugs item #971327, was opened at 2004-06-11 20:02
Message generated for change (Comment added) made by wthaller
You can respond by visiting:
https://sourceforge.net/tracker/?func=detailatid=108032aid=971327group_id=8032
Category: None
Group: 6.0
Status: Closed
Resolution: Duplicate
Priority: 5
Arjan van IJzendoorn wrote:
I couldn't get finalisers to work either with the newForeignPtr from
this module. I didn't know how to create a proper FunPtr. In
Foreign.Concurrent there is a newForeignPtr that is easier to use:
[deleted]
I seem to remeber running in to this problem a
Krasimir Angelov wrote:
The problem here is that the external functions
(instances of type FunPtr) are always executed with
ccall convention regardless of stdcall declaration in
the foreign import. The workaround is to write simple
stub function in C with ccall convention.
You are right, I did
Niklas Sorensson wrote:
Arjan van IJzendoorn wrote:
I couldn't get finalisers to work either with the newForeignPtr from
this module. I didn't know how to create a proper FunPtr. In
Foreign.Concurrent there is a newForeignPtr that is easier to use:
[deleted]
I seem to remeber running in to
Arjan van IJzendoorn wrote:
foreign import ccall ... finaliserCreator :: IO (FunPtr (Ptr a -
IO ()))
and then
finaliser - finaliserCreator
AFAIK this creates some dynamic machine code in malloce'd area, so there
is need to free it afterward with freeHaskellFunPtr. Are you doing that?
Hi all,
I'd like to make some use of OpenGL with Haskell (under Win2000).
Here is some code:
module Main where
import Graphics.Rendering.OpenGL.GL
import Graphics.Rendering.OpenGL.GLU
import Graphics.UI.GLUT
main = do
ver - get gluVersion
putStrLn ver
getArgsAndInitialize
AFAIK this creates some dynamic machine code in malloce'd area, so there
is need to free it afterward with freeHaskellFunPtr. Are you doing that?
How? And when? I did not find any suitable place in my code to call
freeHaskellFunPtr.
Machine code is dynamically created when you turn a Haskell
A new version of the hs-plugins library has been released, v0.9.5.
hs-plugins provides dynamic loading, runtime compilation and an eval()
mechanism for Haskell plugins:
http://www.cse.unsw.edu.au/~dons/hs-plugins
New features:
* eval :: Typeable a = String - [Import] - IO (Maybe
Dear Jon,
Thanks for your remarks.
Jon Fairbairn writes:
Interesting. But why do you use Int rather than the Integer?
Ok, I admit that I should have used Integer. Moreover, in practice you
would like to use [a] when I use (Int - a), as you'll notice.
In particular
This gives some
Hi,
I have an question about the IO monad
I want to have a function that unpack an
IO.
I should have the type: IO a - a.
Is this possible?
Kind regards
Tom Hofte
___
Haskell mailing list
[EMAIL PROTECTED]
On Fri, Jun 11, 2004 at 01:23:11PM +0200, Tom Hofte wrote:
I want to have a function that unpack an IO.
I should have the type: IO a - a.
Is this possible?
There is unsafePerformIO, but before you use it, think - do you
really, really want to use it and you really, really know what the
Tom Hofte writes (to the Haskell mailing list):
I want to have a function that unpack an IO.
I should have the type: IO a - a.
Is this possible?
Tomasz Zielonka replies:
There is unsafePerformIO, but before you use it, think [..]
See also http://www.haskell.org/hawiki/ThatAnnoyingIoType.
Cheers,
On Fri, Jun 11, 2004 at 01:23:11PM +0200, Tom Hofte wrote:
I want to have a function that unpack an IO.
I should have the type: IO a - a.
Is this possible?
There is unsafePerformIO, but before you use it, think - do you
really, really want to use it and you really, really know what the
On 11 Jun 2004, at 08:50, Keith Wansbrough wrote:
On Fri, Jun 11, 2004 at 01:23:11PM +0200, Tom Hofte wrote:
I want to have a function that unpack an IO.
I should have the type: IO a - a.
Is this possible?
There is unsafePerformIO, but before you use it, think - do you
really, really want to use
(and the ghost of Launchbury whispers in my ear that this is the
Haskell list, and unsafePerformIO is not Haskell!).
John is dead?!?!?!
Not to my knowledge, just not on the mailing list...
--KW 8-)
--
Keith Wansbrough [EMAIL PROTECTED]
http://www.cl.cam.ac.uk/users/kw217/
University of
At 13:23 11/06/04 +0200, Tom Hofte wrote:
Hi,
I have an question about the IO monad
I want to have a function that unpack an IO.
I should have the type: IO a - a.
Is this possible?
Possible, but... in addition to other responses, I'd also recommend looking
at this:
Gentle Haskellers
It's pleasing that there have been so few bug reports about the Revised
Haskell 98 report, which was published in January 2003. But there have
been some: see
http://research.microsoft.com/~simonpj/haskell98-revised/haskell98-revis
ed-bugs.html
and every now and again
Hi, when writing haskell code. It is so annoying that name clashes keep
happening.
I have to be careful about the data constructor names, about the class
names, about the class member names.
I understand that we can use class to achieve some overloading effect.
However, it does not help
While what I want to say has implicitly been said I'd just
like to suggest that there is a simple way to put the whole
matter less cryptically.
The obvious question that just about anyone starting with
the IO monad asks is how can I write (IO a - a)? The simple
answer is, you don't have to
[EMAIL PROTECTED] wrote:
Hi, when writing haskell code. It is so annoying that name clashes keep
happening.
I have to be careful about the data constructor names, about the class
names, about the class member names.
[...]
As a novice haskell programmer, I might be missing something here though.
If
On Jun 9, 2004, at 9:39 AM, Jerzy Karczmarczuk wrote:
I have *nothing* to add, just a question.
Do you /anybody/ know of any edible work on ADJUNCTIONS in the context
of Haskell structures? Perhaps instead of searching for 'inverses' one
should think more about adjoints?...
Yes, I think this is
First, concerning your question about monads and multiplication: a
monad on category C is exactly a monoid object in the category [C-C]
of endofunctors on C, and natural transformations between them. A
monoid in a category is, as you expect, an object X with arrows
m:X*X-X and u:1-X satisfying
Andre,
Thanks for paper pointers.
Hmm, what's the higher goal of what you're trying to achieve? I, like
you, came from a background of object-oriented programming, and I've
always managed to avoid making a list containing more than one type
after re-thinking about the problem. You can do
Greetings,
I need to call Haskell functions from a Java
program. In the Java side, I can use JNI, which
expects C-call functions exported from dynamically
linked libraries. So, a primitive way to get what I
want is to generate a dynamic library from Haskell
code with exported ccall
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