CTASSERT — compile time assertion macro

       This manual page was written by Hiten M. Pandya <hmp@FreeBSD.org>.

Debian                                           August 1, 2015                                      CTASSERT(9)

       The  CTASSERT()  macro  is  deprecated and the C11 standard _Static_assert() should be used instead.  The
       header sys/cdefs.h should be included to provide compatibility for pre-C11 compilers.

       The CTASSERT() macro evaluates expression at compile time and causes a compiler error if it is false.

       The CTASSERT() macro is useful for asserting the size or  alignment  of  important  data  structures  and
       variables during compilation, which would otherwise cause the code to fail at run time.

       Assert that the size of the uuid structure is 16 bytes.

             CTASSERT(sizeof(structuuid)==16);

       CTASSERT — compile time assertion macro

KASSERT(9)

#include<sys/param.h>#include<sys/systm.h>CTASSERT(expression);