From: *Simon Peyton-Jones* mailto:simonpj@microsoft.com>

Norman

| - Is there anything published about the implementation of GHCi? | Or perhaps something on the Developers' Wiki that explains how it works?

If you mean the details of bytecode compilation and the bytecode interpreter, I'm really not sure that there is. That's bad; there should be. I'm ccing Simon M in case he knows of something.

Julian Seward wrote some notes on the way GHCi works, which are in the commentary: http://hackage.haskell.org/trac/ghc/wiki/Commentary/Compiler/Backends/GHCi It's not much, but there are some technical details about stacks and suchlike there. The bytecode itself is a pretty simple stack machine, I can probably answer questions if there's anything you need some help with. Cheers, Simon