on Sat Aug 16 2008, Zeljko Vrba <zvrba-AT-ifi.uio.no> wrote:
I get a warnings about type truncation, and obviously, I don't like them. But I like explicit casts and turning off warnings even less. No, I don't want to tie together size_type and task id type (unsigned int). One reason is "aesthetic", another reason is that I don't want the task id type to be larger than necessary (heck, even a 16-bit type would have been enough), because the task IDs will be copied verbatim into another std::vector<unsigned> for further processing (edge lists of a graph). Doubling the size of an integer type shall have bad effects on CPU caches, and I don't want to do it.
What to do? Encapsulate into "get_next_id()" function? Have a custom size() function/macro that just casts the result of vector::size and returns it?
Have you looked at boost::numeric_cast? -- Dave Abrahams BoostPro Computing http://www.boostpro.com