Somehow last night I ended up getting stuck in a black hole of blog post reading. One of the topics I started reading about was CPS (continuation-passing style), i.e. call/cc. Here are some of the docs I found on the subject, though I need to actually read them:

• https://www.haskell.org/haskellwiki/Continuation
• http://www.madore.org/~david/computers/callcc.html
• http://www.haskellforall.com/2012/12/the-continuation-monad.html
• http://www.amazon.com/dp/052103311X/
• http://hackage.haskell.org/package/mtl-2.2.1/docs/Control-Monad-Cont.html
• https://www.haskell.org/haskellwiki/Library/CC-delcont
• http://okmij.org/ftp/continuations/index.html#zipper-fs
• http://www.haskellforall.com/2012/12/the-continuation-monad.html