Zitat von John Maddock
I've check crtdefs.h on my system . It defined ptrdiff_t here but not under std namespace . Is the right place that ptrdiff_t got defined ? If not in which file should ptrdiff_t be defined . Maybe I should search the file where size_t got defined ? thanks in advance
This makes no sense to me, which VC++ version are you using, and what compiler options? Boost.Array works just fine for me under VC++ and always has.
most likely you fergot to close a namespace in one of your own headers, which was included before array.hpp (or some other header including <cstddef>). then something that's supposed to be in "std" can end up in "your_namespace::std". try to include all of your headers after standard and boost headers.