[boost] Silent change in boost 1.36 alignment_of<> template with gcc 4.3

In boost 1.36, boost::alignment_of<> was changed to use the builtin __alignof__() if gcc version was 4.3 or greater rather than using calculating alignement using: template <typename T> struct alignment_of_hack { char c; T t; alignment_of_hack(); }; Unfortunately, this broke some code I had written that did structure introspection, because gcc's __alignof__() returns 8 for double on the x86 architecture, but actually only aligns doubles on 4 byte boundaries inside structures. What do people think about adding a struct_alignment_of<> template that uses the old logic to compute alignment inside a struct? -- Jon Biggar jon@floorboard.com jon@biggar.org jonbiggar@gmail.com