Steven Watanabe wrote:

In accumulate and fold I see

is_same< typename result_of::begin<Sequence const>::type , typename result_of::end<Sequence const>::type>()

shouldn't this be result_of::equal_to<...>()?

You're correct, that is a defect. Now fixed in CVS. Thanks for picking this up Cheers Dan Send instant messages to your online friends http://uk.messenger.yahoo.com