From: haskell-cafe-bounces@haskell.org [mailto:haskell-cafe-bounces@haskell.org] On Behalf Of Radoslaw Grzanka
Hi, Is there any plugin system for haskell? For example, in Java, I can load all compiled classes from given directory, check their interfaces and run some methods through reflection etc. Is it possible in haskell, to load modules from given directory, and if in module there is instance of class then return instantiation of that class?
There are two libs that I'm aware of. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/plugins-1.0 http://hackage.haskell.org/cgi-bin/hackage-scripts/package/metaplug-0.1. 1 AFAICT, plugins is more mature and has a higher-level API, but the last time I looked it was not working on Windows under ghc >= 6.6 (can anyone refute or verify this?) It's more like dynamic linking than Java's reflection: you have to already know what functions are in the module (and their types) to be able to call them. I'm not sure about directly creating values of data types exported from the module. Alistair ***************************************************************** Confidentiality Note: The information contained in this message, and any attachments, may contain confidential and/or privileged material. It is intended solely for the person(s) or entity to which it is addressed. Any review, retransmission, dissemination, or taking of any action in reliance upon this information by persons or entities other than the intended recipient(s) is prohibited. If you received this in error, please contact the sender and delete the material from any computer. *****************************************************************