On 08/20/10 16:21, Steven Watanabe wrote: [snip]
We already have reverse_fold, which makes 2/4.
fusion::reverse_fold takes the sequence as the first argument. In contrast, the haskell function takes the sequence as the last argument. That wouldn't be a big problem except if you plan to provide a variadic template: http://www.osl.iu.edu/~dgregor/cpp/variadic-templates.html version of these functions. The variadic template spec requires the parameter pack to be at the end, IOW: template<typename Op, typename State0, typename... Values) foldl(Op,State0,Values&... values); Which is exactly the way haskell orders the arguments. I know this is different than the way fusion and mpl do it; however, if arg packs (e.g. Values&... values) are to be used, then I don't see any workaround. -Larry