I like to use undefined is the stub for unimplemented functions since it's nice and terse. Unfortunately, ghc doesn't give much information about where the undefined was called. It would be great if the message for undefined could include file name and line number (like hbc did :). -- Lennart On Oct 30, 2006, at 09:54 , Simon Peyton-Jones wrote:
| I don't like this idea because the necessary stub is different for different | numbers of arguments, and there's no way to tell how many arguments the | programmer intended.
Why? What's wrong with expanding foo :: Int -> Int -> Int into foo :: Int -> Int -> Int foo = error "foo is not yet implemented"
which is what I usually write by hand.
|I do like the idea of allowing empty case expressions, | though, and I don't think that even a warning would be necessary.
So how would you define foo? How would it be better than the above (even if written by hand)?
Simon _______________________________________________ Libraries mailing list Libraries@haskell.org http://www.haskell.org/mailman/listinfo/libraries