Modern C++ Programming Cookbook

How to do it...

• To control the alignment of a type (both at the class level or data member level) or an object, use the alignas specifier:

        struct alignas(4) foo         {           char a;           char b;         };         struct bar         {           alignas(2) char a;           alignas(8) int  b;         };         alignas(8)   int a;         alignas(256) long b[4];

• To query the alignment of a type, use the alignof operator:

        auto align = alignof(foo);