[Haskell-cafe] Re: calling haskell from C++

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"Vladimir" == Vladimir Portnykh writes:

Vladimir> Hello ALL, I am very new to Haskell and my question might Vladimir> appear very basic sorry about it in advance. I have a C++ Vladimir> application and I would like to be able to launch Haskell Vladimir> interpreter (lets say GHC) supplying the Haskell code (in a ghci - not ghc. Vladimir> file ) to be interpreted from it. The Haskell program Vladimir> generates some output and I would like to use this output in Vladimir> my C++ program. Do you have any simple example to help me, Vladimir> please? Hmm. That depends on what the output of the haskell program is. If I understand you corrrectly the output of the program is what it writes to the stdout. In this case you'll can do the job using popen(2) (or whatever is available in your OS) - you create process to run 'runhaskell file.hs' and redirect its stdout to a pipe. There is also an FFI which allows you to call functions written in Haskell from other languages. In this case your Haskell program must export C-level API to be used from C++. Or, and of cause you can use IPC to connect your programs. -- WBR, Max Vasin. NP: