Hi, I tried to access C++ iterators from Haskell via the FFI. There are two example programs attached, in Haskell as well as in C++. Both utilise the same iterator wrapper example.cpp, but when running the Haskell program it prints an empty list, where it should print the contents of some vector. The C++ program meanwhile runs fine though. What does not seem to work is this part:
bool
finished (std::vector<int>::iterator *begin, std::vector<int>::iterator
*end)
{
return *begin == *end;
}
In Haskellland, "finished :: Ptr Iterator -> Ptr Iterator -> IO Bool" always
returns IO True. Is this a bug lurking in my program or is it a GHC issue?
Long
ffi_and_iterators.tar.gz
Description: GNU Zip compressed data
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