Ketil Malde
I've recently run into a problem using the preprocessor (ghc -cpp). It seems it barfs on 's (apostrophe). Annoying, since naming variables something-prime is a fairly common idiom.
Is this something that has a workaround, or could be fixed?
The main workaround if using traditional cpp is to avoid apostrophes. :-( On the other hand, cpphs has a more liberal lexical policy, and permits both apostrophes and backticks within a token. So, your example
let w' = head ... -- breaks
would work fine in cpphs, and other tricks impossible with the original cpp are also possible, like this: #define `mplus` +++ The mismatch between C's and Haskell's lexical syntax was one important motivation for developing cpphs. Regards, Malcolm