CTASSERT(9)            NetBSD Kernel Developer's Manual            CTASSERT(9)


NAME
CTASSERT -- compile time assertion macro
SYNOPSIS
void CTASSERT(expression);
DESCRIPTION
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.
IMPLEMENTATION NOTES
The CTASSERT() macro should not be used in a header file. It is imple- mented 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
KASSERT(9)
AUTHORS
This manual page was written by Hiten M. Pandya <hmp@FreeBSD.org>. NetBSD 9.0 January 24, 2010 NetBSD 9.0

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