NAME

     CTASSERT — compile time assertion macro

SYNOPSIS

     #include <sys/param.h>
     #include <sys/systm.h>

     CTASSERT(expression);

DESCRIPTION

     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.

EXAMPLES

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

           CTASSERT(sizeof(struct uuid) == 16);

SEE ALSO

     KASSERT(9)

AUTHORS

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