1*4882a593Smuzhiyun #ifndef _LINUX_CONST_H 2*4882a593Smuzhiyun #define _LINUX_CONST_H 3*4882a593Smuzhiyun 4*4882a593Smuzhiyun #include <vdso/const.h> 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun /* 7*4882a593Smuzhiyun * This returns a constant expression while determining if an argument is 8*4882a593Smuzhiyun * a constant expression, most importantly without evaluating the argument. 9*4882a593Smuzhiyun * Glory to Martin Uecker <Martin.Uecker@med.uni-goettingen.de> 10*4882a593Smuzhiyun */ 11*4882a593Smuzhiyun #define __is_constexpr(x) \ 12*4882a593Smuzhiyun (sizeof(int) == sizeof(*(8 ? ((void *)((long)(x) * 0l)) : (int *)8))) 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun #endif /* _LINUX_CONST_H */ 15