The header /boost/type_traits/type_with_alignment.hpp specializes the template type_with_alignment only for 1, 2, 4, 8, 10, 16, 32 bytes. Unless there is a reason to not do so, I would like to ask for extension of the alignment to 64 and 128 bytes as well. (In my case, I need it for the cl_double16 vector type in OpenCL)

As workaround, I am currently using doing the specialization in my code:

...

namespace boost { namespace align { struct __attribute__((__aligned__(128))) a128 {};} template<> class type_with_alignment<128> { public: typedef align::a128 type; }; };

Nod, that's come up before, I believe it should be fixed in Trunk (and the next release). John.