Hi -
I've got a Haskell module with the following ffi import:
foreign import ccall duma_init :: Int - IO Int
However my problem is that I've got no idea what the type signature for the
corresponding C function should be, and when I compile the above module with
ghc -fglasgow-exts -fffi --make
Hello Brian,
Tuesday, March 7, 2006, 7:35:27 PM, you wrote:
BH foreign import ccall duma_init :: Int - IO Int
int duma_init(int);
BH I've tried looking at the wiki but that only seems to give specific
BH examples. I'm trying to find what the mapping is between Haskell function
BH signatures
Hi -
I've set up my Visual Studio environment so that ghc is an external tool,
where the output from ghc appears on the VS output pane. However when I use
this to compile and link a Haskell program (I'm just using the plain text
editor that comes with VC++ not the Haskell plugin because of its
On Tue, Mar 07, 2006 at 06:45:52PM -, Brian Hulley wrote:
Is there any flag to get ghc or the ghc linker to print Done or something
when it's finished?
In unix you could wrap ghc in a script that would print Done if ghc
finished successfully. I am sure you can do it somehow in windows.
In unix you could wrap ghc in a script that would print Done if ghc
finished successfully. I am sure you can do it somehow in windows.
ghc --make Whatever
if errorfail 1 goto failed
echo Success :-)
goto end
:failed
echo Failure :-(
:end
Thanks
Neil
On Tue, Mar 07, 2006 at 04:35:27PM -, Brian Hulley wrote:
A third point is, how would I pass an arbitrary monad instead of just using
IO?
What for? IO is the monad that most closely matches the imperative, C
semantics. That's why FFI only supports the IO monad (and pure
functions). Other
On Tue, Mar 07, 2006 at 06:54:50PM +, Neil Mitchell wrote:
In unix you could wrap ghc in a script that would print Done if ghc
finished successfully. I am sure you can do it somehow in windows.
ghc --make Whatever
if errorfail 1 goto failed
echo Success :-)
goto end
:failed
echo
On Tue, Mar 07, 2006 at 07:57:50PM +0100, Tomasz Zielonka wrote:
On Tue, Mar 07, 2006 at 04:35:27PM -, Brian Hulley wrote:
A third point is, how would I pass an arbitrary monad instead of just using
IO?
What for? IO is the monad that most closely matches the imperative, C
semantics.
Neil Mitchell wrote:
In unix you could wrap ghc in a script that would print Done if ghc
finished successfully. I am sure you can do it somehow in windows.
ghc --make Whatever
if errorfail 1 goto failed
echo Success :-)
goto end
failed
echo Failure :-(
end
Thanks Neil - the script below,
Bulat Ziganshin wrote:
Hello Brian,
Tuesday, March 7, 2006, 7:35:27 PM, you wrote:
foreign import ccall duma_init :: Int - IO Int
int duma_init(int);
Also, I really wanted to be able to use () - IO () but () doesn't
seem to be allowed in FFI...
void f(void);
foreign import ccall f :: IO
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