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A comment on Guile also supports the web at the programming language level. Parent comment

Re:Guile also supports the web at the programming language l... by neutronicus on Friday December 17, 2010 @09:45PM (#2018735)
Debug.trace is the module for you, my friend.

Debug.trace a b = a

and b gets logged to the console. Or maybe it's backwards. I forget.

[ Parent | on HN ]
Re:Guile also supports the web at the programming language l... by lsb on Friday December 17, 2010 @10:55PM (#2018841)
It's the opposite way:

  Debug.Trace.trace :: String -> a -> a
and if you don't like debug.trace, you can make your own, via unsafePerformIO!

  hackyDebugTrace s v = unsafePerformIO (putStrLn s >>= \_ -> return v)
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