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 */