Perhaps I've not described the question quite clear. :-( What I mean is in the cases the specified stride > 1, will it cause undefined bahavior if I define the range of one dimention as range_t(first, last+stride-1, stride) (I know the correct form is range_t(first, last+stride, stride)) Thanks for any explanation. Max ----- Original Message ----- From: loadcom To: boost-users Subject: [Boost-users] [MultiArray] Bound Guarding Date: 2008-12-21 09:29:55 Hello, I'm using boost::multi_array for a while and find it very powerful except one point that I cannot specify an array_view's number of dimentions at runtime. But this pity is not the topic of this post. You know one can create an array_view with arbirary given start/bound indices as well as the stride as follows: typedef boost::multi_array array_t; array_t myarray; //... typedef array_t::index_range range_t; typename array_t::array_view::view myview = myarrray[boost::indices[range_t(0, 8, 2)][rang_t()][1]]; As I don't know in the internal of the lib how the dound guarding of iteration is done, either - in the 'standard' STL manner as i!=bound; or - in the 'conventional' C stale as ihttp://space.sina.com.cn/ ) ------------------------------------------------------------------- 新浪空间——与朋友开心分享网络新生活！(http://space.sina.com.cn/ )