NAME
CTASSERT —
compile time assertion macro
SYNOPSIS
void
CTASSERT(expression);
DESCRIPTION
TheCTASSERT()
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.
IMPLEMENTATION NOTES
The CTASSERT() macro should not be used in
a header file. It is implemented using a dummy typedef, with a name (based
on line number) that may conflict with a CTASSERT()
in a source file including that header.
EXAMPLES
Assert that the size of the uuid structure is 16 bytes.
CTASSERT(sizeof(struct uuid) ==
16);SEE ALSO
AUTHORS
This manual page was written by Hiten M. Pandya ⟨hmp@FreeBSD.org⟩.