Bang patterns

Earlier on the Haskell' list, I proposed bang patterns as a way to make it more convenient for Haskell programmers to make their programs stricter. E.g. f (!x, y) = .... I've documented the proposal here http://haskell.galois.com/cgi-bin/haskell-prime/trac.cgi/wiki/BangPatter ns I've implemented it in GHC, so you can try it out. Use -fbang-patterns to enable bang patterns. If you use -fglasgow-exts you get -fbang-patterns as well. If you don't want that, use -fglasgow-exts -fno-bang-patterns. I'd be interested to hear your experiences. (Committee members: do add notes to the Wiki page giving pros and cons.) Simon