Different compilers are not 100% compatible each to other, and even different versions of the same compilers may be incompatible. You should be ready either to stick yourself and your co-wokers to a certain version of the compiler or to spend some significal time to keep you programs working with any compiler.
Sorry to disagree. I ported an application that's about 6,000 lines of H'98 code from NHC to GHC. This took less than an hour. (I think the only problem had to do with import rules.) Both before and after it was compatible with HUGS. After I got it past the GHC compiler without errors, there were no subsequent problems with differing interpretations. Earlier ports from Gofer to NHC1.3 and from NHC1.3 to NHC98 where also fairly painless (mostly syntax fiddling). So I have to agree with SPJ, Haskell '98 is consistantly supported by multiple implementations. If you stray outside of Haskell '98, it can be expected that things will not be so smooth, since you will then be using features that range from nonstandard to experimental. -- Cheers, Theodore Norvell ---------------------------- Dr. Theodore Norvell theo@engr.mun.ca Electrical and Computer Engineering http://www.engr.mun.ca/~theo Engineering and Applied Science Memorial University of Newfoundland St. John's, NF, Canada, A1B 3X5 Currently visiting the Department of Computer Science and ICICS at the University of British Columbia. See my webpage for contact details.