LXR linux/include/linux/const.h

   1#ifndef _LINUX_CONST_H
   2#define _LINUX_CONST_H
   3
   4#include <vdso/const.h>
   5
   6/*
   7 * This returns a constant expression while determining if an argument is
   8 * a constant expression, most importantly without evaluating the argument.
   9 * Glory to Martin Uecker <Martin.Uecker@med.uni-goettingen.de>
  10 */
  11#define __is_constexpr(x) \
  12        (sizeof(int) == sizeof(*(8 ? ((void *)((long)(x) * 0l)) : (int *)8)))
  13
  14#endif /* _LINUX_CONST_H */
  15