Gennadiy Rozental wrote: > Would it correct to state that following pseudo-code properly > reflect the essence of the appropriate algorithms: > > iter_fold( sequence s, state st, binary_operator op ) { > iterator it = s.begin(); > > while( it != s.end() ) > st = op( st, it );
return st; > } > fold( sequence s, state st, binary_operator op ) { > iterator it = s.begin(); > > while( it != s.end() ) > st = op( st, *it ); return st; > } > iter_fold_backward( sequence s, > state st, > binary_operator backward_op, > binary_operator forward_op = identity ) { > iterator it = s.begin(); > > while( it != s.end() ) > st = forward_op( st, it ); > > while( --it != s.begin() ) > st = forward_op( st, it ); > > st = forward_op( st, it ); return st; > } > > fold_backward( sequence s, > state st, > binary_operator backward_op, > binary_operator forward_op = identity ) { > iterator it = s.begin(); > > while( it != s.end() ) > st = forward_op( st, *it ); > > while( --it != s.begin() ) > st = forward_op( st, *it ); > > st = forward_op( st, *it ); return st; > } Yep, that's basically what they do. > P.S. MPL docs reference pages does not formatted for > printing. They does not fit the page width. See iter_fold or example. Yep, it's a known problem. The new revision will come in PDF (properly formatted) as well as HTML, so it won't be an issue then. Aleksey _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost