Good cross platform functional language for library use in a C++ application?

Question

What are my options in terms of a fast functional language for library use in a cross-platform Qt C++ application?

It seems almost all languages (functional or not) have some way of calling C/C++ code in an easy manner. I'd like to go the other way around - write an application in Qt using C++ for stateful business logic, GUIs and stuff but drop down and use a functional language for the core calculation library.

Which ones are easy to use in this manner? Can for instance OCaml code be compiled into a static library and then consumed by a C++ app?

Thanks, Rickard

Answer 1

Haskell has this capability, though the interaction with Qt/qmake and your build process with ghc may take a little trickery to get working:

http://www.haskell.org/haskellwiki/Calling_Haskell_from_C

There is also a project called HaskellDirect which seems similar to your purpose as well:

http://www.haskell.org/hdirect/