perhaps haskell: foreign export "foo_func" foo :: Int -> IO Int -- I forget the rest of the syntax here C++: extern "C" { int foo_func(int i); } int some_cplusplus_function() { int bat = 3; int blah = foo_func(bat); return blah; } Is that all you need to do? Miguel Lordelo wrote:
Hi all,
Well...somehow I'm a beginner in Haskell. But actually my interest in Haskell will increase if it is possible to call a haskell function in C++. Something like GreenCard ( http://www.haskell.org/greencard/ ) simplifying the task of interfacing Haskell programs to external libraries (usually). But is there also a task to interface a foreign language with Haskell, but calling Haskell functions. Or c2hs which is an interface generator that simplifies the development of Haskell bindings to C libraries.
I want to know this, because in my company some guys are doing some testing with Frotran and MatLab and I want to show them the power of haskell and the software which we are using is implemented in C++ (there is the reason to make Haskel -> C++).
I read somewhere that the only way for C++ calling a haskell function is to create a binding between Haskell and C and from C to C++, but a easy "Hello World" example was not there. Unfortunatelly I couldn't found anything usefull, like an complete example, or how to compile the code from haskell to C to C++.
Can sombody help me, please :P
Chears, Miguel Lordelo.
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