[Haskell-cafe] Enumerating functions at runtime

[Brent Yorgey]

On Sat, Mar 23, 2013 at 08:26:52PM -0700, Luke Evans wrote:
> I'm curious about using Haskell for metaprogramming.
> 
> It looks like I can dynamically compile, load and run some Haskell with the plugins package.  Actually I've briefly tried this and it seems to work for some simple cases at least.
> Now I would like to be able to enumerate precompiled public functions in modules that I might use as building blocks in such dynamic compilation.  So far I'm not seeing anything that does this directly.
> Can anyone provide some pointers?
> 
> If it's just not possible to introspect on compiled modules, then I suppose I could use external metadata of my own, or even perhaps haddock info if it exists, to attempt to generate this info.  Clearly though, that's nowhere near as good as extracting the info from something the compiler built directly.

I have no idea how it works, but I'm pretty sure yi does this ---
e.g. if you hit M-x (when in emacs emulation mode) and then
tab-complete, you see a list of all the available functions.  Maybe
you want to take a look at the yi source code and see how they do it.

-Brent