CTASSERT(9) FreeBSD Kernel Developer's Manual CTASSERT(9)
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 <
[email protected]>.
FreeBSD 14.1-RELEASE-p8 August 1, 2015 FreeBSD 14.1-RELEASE-p8